CALVERT TAX FREE RESERVES
485BPOS, 1999-04-27
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SEC Registration Nos.
2-69565 and 811-3101

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM N-1A

REGISTRATION STATEMENT UNDER THE
SECURITIES ACT OF 1933

Post-Effective Amendment No. 48             XX

                                     and/or

REGISTRATION STATEMENT UNDER THE
INVESTMENT COMPANY ACT OF 1940

Amendment No. 48                            XX

                           Calvert Tax-Free Reserves
               (Exact Name of Registrant as Specified in Charter)

                             4550 Montgomery Avenue
                                  Suite 1000N
                            Bethesda, Maryland 20814
                    (Address of Principal Executive Offices)

                 Registrant's Telephone Number: (301) 951-4881

                           William M. Tartikoff, Esq.
                             4550 Montgomery Avenue
                                  Suite 1000N
                            Bethesda, Maryland 20814
                    (Name and Address of Agent for Service)

It is proposed that this filing will become effective

__ Immediately upon filing                  XX on April 30, 1999
pursuant to paragraph (b)                   pursuant to paragraph (b)

__ 60 days after filing                     __ on (date)
pursuant to paragraph (a)                   pursuant to paragraph (a)

of Rule 485.
<PAGE>
PROSPECTUS
April 30, 1999

CALVERT TAX-FREE RESERVES FUND
CTFR Money Market Portfolio
CTFR Limited-Term Portfolio
CTFR Long-Term Portfolio



About the Fund
2        Investment Objective, Strategy, Past Performance
8        Fees and Expenses
10       Principal Investment Practices and Risks

About Your Investment
14       Calvert Group and the Portfolio Management Team
14       Advisory Fees
15       How to Buy Shares (Sales charges, etc.)
17       Important - How Shares are Priced
18       Other Calvert Group Features
         (Exchanges, Minimum Account Balance, etc.)
21       Dividends, Capital Gains and Taxes
23       How to Sell Shares
25       Financial Highlights
28       Exhibit A - Reduced Sales Charges
30       Exhibit B - Service Fees and
         Other Arrangements with Dealers



These securities have not been approved or disapproved by the Securities and
Exchange Commission ("SEC") or any state securities commission nor has the
SEC or any state securities commission passed upon the accuracy or adequacy
of this prospectus. Any representation to the contrary is a criminal offense.

CTFR MONEY MARKET

Objective
CTFR Money Market (the "Fund") seeks to earn the highest level of interest
income, exempt from federal income taxes, as is consistent with prudent
investment management, preservation of capital, and the quality and maturity
characteristics of the Fund.

Principal Investment Strategies and Related Risks

CTFR Money Market invests in fixed and floating rate municipal bonds and
notes, variable rate demand notes, tax-exempt commercial paper, and other
high quality, short-term municipal obligations. The Advisor looks for
securities with strong credit quality that are attractively priced. This may
include investments with unusual features or privately placed issues that
are not widely followed in the fixed income marketplace. All investments
must comply with the SEC money market fund requirements.

Many of the instruments held by the Fund are supported by letters of credit
issued by banks; thus, the Fund has a wide exposure to the banking industry.

The Fund may purchase securities that have not been rated by a rating
agency, so long as the Advisor determines they are of comparable credit
quality.

Unrated and privately placed securities may be less liquid than those that
are rated or have an active trading market.

CTFR Money Market's yield will change in response to market interest rates.
In general, as market rates go up so will the Fund's yield, and vice versa.
Although the Fund tries to keep the value of its shares constant at $1.00
per share, extreme changes in market rates, and or sudden credit
deterioration of a holding could cause the value to decrease. The Fund
limits the amount it invests in any one issuer to try to lessen its exposure.

An investment in the Fund is not a bank deposit and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other
government agency. Although the Fund seeks to preserve the value of your
investment at $1.00 per share, it is possible to lose money by investing in
the Fund.


CTFR Money Market Performance
The bar chart and table below show the Fund's annual returns and its
long-term performance. The chart and table provide some indication of the
risks of investing in the Fund. The chart shows how the performance has
varied from year to year. The table compares the Fund's returns over time to
the Lipper Tax-Exempt Money Market Funds Index, a composite index of the
annual return of mutual funds that have an investment goal similar to that
of the Fund. The Fund's past performance does not necessarily indicate how
the Fund will perform in the future.

CTFR Money Market
Year-by-Year Total Return

[BAR CHART]
1989     6.47%        1994     2.81%
1990     6.04%        1995     4.02%
1991     4.96%        1996     3.33%
1992     3.17%        1997     3.38%
1993     2.41%        1998     3.32%

Best Quarter (of periods shown)     Q2 '89  1.67%
Worst Quarter (of periods shown)    Q1 '93  0.56%


Average Annual Total Returns (as of 12.31.98)

                               1 year       5 years       10 years
CTFR Money Market              3.22%        3.35%         3.97%
Lipper Tax-Exempt
Money Market Funds Index       3.04%        3.06%         3.58%

For current yield information call 800-368-2745, or visit Calvert Group's
website at www.calvertgroup.com

CTFR LIMITED-TERM

Objective
CTFR Limited-Term (the "Fund") seeks to earn the highest level of interest
income exempt from federal income taxes as is consistent with prudent
investment management, preservation of capital, and the quality and maturity
characteristics of the Fund.

Principal Investment Strategies
While seeking to achieve its objective, CTFR Limited-Term strives to
minimize volatility in the net asset value (NAV) per share. The Advisor
intends under normal circumstances to maintain an average portfolio maturity
of three years or less. The Fund typically invests at least 85% of its net
assets in investment grade debt securities. The Advisor looks for securities
with strong credit quality within their rating category that are
attractively priced. This may include investments with unusual features or
privately placed issues that are not widely followed in the fixed income
marketplace.

The Fund may invest in a variety of  tax-exempt obligations including
tax-supported debt (general obligation bonds and notes of state and local
issuers), various types of revenue debt (transportation, housing, utilities,
hospital), special tax obligations, and qualified private activity bonds and
other state and local government authorities, tax and revenue anticipation
notes and bond anticipation notes, municipal leases, and certificates of
participation in such investments. The obligations may be structured as
variable rate or adjustable rate obligations and are often supported by a
third party letter of credit.

CTFR Limited-Term may purchase unrated securities, so long as the Advisor
determines they are of comparable credit quality. Unrated securities may be
less liquid than those that are rated.

PRINCIPAL RISKS
You could lose money on your investment in the Fund, or the Fund could
underperform, most likely for any of the following reasons:

o        The bond market goes down
o        The individual bonds in the Fund do not perform as well as expected
o        The Advisor's forecast as to interest rates is not correct
o        The Advisor's allocation among different sectors of the bond market
does not perform as well as expected

An investment in the Fund is not a bank deposit and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other
government agency.

CTFR Limited-Term Performance
The bar chart and table below show the Fund's annual returns and its
long-term performance. The chart and table provide some indication of the
risks of investing in the Fund. The chart shows how the performance has
varied from year to year. The table compares the Fund's performance over
time to that of the Lehman Municipal Bond Index. This is a widely
recognized, unmanaged index of bond prices. It also shows the Fund's returns
compared to the Lipper Short Municipal Debt Funds Index, a composite index
of the annual return of mutual funds that have an investment goal similar to
that of the Fund. The Fund's past performance does not necessarily indicate
how the Fund will perform in the future.

The bar chart does not reflect any sales charge that you may be required to
pay upon purchase or redemption of the Fund's shares. Any sales charge will
reduce your return. The average total return table shows returns with the
maximum sales charge deducted. No sales charge has been applied to the index
used for comparison in the table.

CTFR Limited-Term
Year-by-Year Total Return (at NAV)

[BAR CHART]
1989     7.13%        1994     2.42%
1990     6.50%        1995     5.55%
1991     6.46%        1996     3.94%
1992     4.99%        1997     4.07%
1993     4.02%        1998     3.87%

Best Quarter (of periods shown)     Q2 '89  2.20%
Worst Quarter (of periods shown)    Q1 '93  0.39%

Average Annual Total Returns (as of 12.31.98)
(with maximum sales charge deducted)
                                      1 year       5 years      10 years
CTFR Limited-Term                     2.82%        3.70%        4.75%
Lehman Municipal Bond Index TR        5.84%        6.10%        8.15%
Lipper Short Municipal Debt
     Funds Index                      4.58%        N/A          N/A


CTFR LONG-TERM
Objective
CTFR Long-Term (the "Fund") seeks to earn the highest level of interest
income exempt from federal income taxes as is consistent with prudent
investment management, preservation of capital, and the quality and maturity
characteristics of the Fund.

Principal Investment Strategies
The Fund typically invests at least 65% of its net assets in investment
grade debt securities. The Advisor looks for securities with strong credit
quality within their rating category that are attractively priced. This may
include investments with unusual features or privately placed issues, that
are not widely followed in the fixed income marketplace. To the extent it
may do so consistent with its investment objective, the Fund follows a
strategy to also seek to provide a competitive rate of total return. There
is no limit on the Fund's average portfolio maturity.

The Fund may invest in a variety of  tax-exempt obligations including
tax-supported debt (general obligation bonds of state and local issuers),
various types of revenue debt (transportation, housing, utilities,
hospital), special tax obligations, and qualified private activity bonds and
other state and local government authorities, municipal leases, and
certificates of participation in such investments. The obligations may be
structured as variable rate or adjustable rate obligations and are often
supported by a third party letter of credit.

CTFR Long-Term may purchase unrated securities, so long as the Advisor
determines they are of comparable credit quality. Unrated securities may be
less liquid than those that are rated.

PRINCIPAL RISKS
You could lose money on your investment in the Fund, or the Fund could
underperform, most likely for any of the following reasons:
o        The bond market goes down
o        The individual bonds in the Fund do not perform as well as expected
o        The Advisor's forecast as to interest rates is not correct
o        The Advisor's allocation among different sectors of the bond market
does not perform as well as expected
o        The Fund is non-diversified. Compared to other funds, the Fund may
invest more of its assets in a smaller number of bonds. Gains or losses on a
single bond may have greater impact on the Fund.

An investment in the Fund is not a bank deposit and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other
government agency.

CTFR Long-Term Performance
The bar chart and table below show the Fund's annual returns and its
long-term performance. The chart and table provide some indication of the
risks of investing in the Fund. The chart shows how the performance of the
shares has varied from year to year. The table compares the Fund's
performance over time to that of the Lehman Municipal Bond Index . This is a
widely recognized, unmanaged index of bond prices. It also shows the Fund's
returns compared to the Lipper General Municipal Debt Funds Index, a
composite index of the annual return of mutual funds that have an investment
goal similar to that of the Fund. The Fund's past performance does not
necessarily indicate how the Fund will perform in the future.

The bar chart does not reflect any sales charge that you may be required to
pay upon purchase or redemption of the Fund's shares. Any sales charge will
reduce your return. The average total return table shows returns with the
maximum sales charge deducted. No sales charge has been applied to the index
used for comparison in the table.

CTFR Long-Term
Year-by-Year Total Return (at NAV)

[BAR CHART]
1989     9.82%        1994     -2.30%
1990     4.75%        1995     16.05%
1991     11.77%       1996     2.89%
1992     7.60%        1997     8.35%
1993     11.11%       1998     5.07%

Best Quarter (of periods shown)     Q1 '95  5.99%
Worst Quarter (of periods shown)    Q1 '94  -3.59%

Average Annual Total Returns (as of 12.31.98)
(with maximum sales charge deducted)
                                      1 year       5 years      10 years
CTFR Long-Term                        1.15%        4.94%        6.94%
Lehman Municipal Bond Index TR        5.84%        6.10%        8.15%
Lipper General Municipal Debt
     Funds Index                      5.64%        5.70%        7.75%


FEES AND EXPENSES

This table describes the fees and expenses that you may pay if you buy and
hold shares of a Fund. Shareholder fees are paid directly from your account;
annual Fund operating expenses are deducted from Fund assets.

                                            Money      Limited-   Long-
                                            Mkt.       Term       Term

Maximum sales charge (load)                 None       1.00%      3.75%
imposed on purchases
(as a percentage of offering price)

Maximum deferred sales charge (load)        None       None       None1
(as a percentage of purchase or
redemption proceeds, whichever is lower)

Maximum Account Fee                         2          None       None

Annual fund operating expenses

Management fees                             .46%       .61%       .61%

Distribution and service (12b-1) fees       None       None       .09%

Other expenses3                             .20%       .12%       .19%

Total annual fund operating expenses        .66%       .73%       .89%

1 Purchases of Long-Term shares for accounts with $1 million or more are not
subject to front-end sales charges, but may be subject to a 1.0% contingent
deferred sales charge on shares redeemed within 1 year of purchase. (See
"How to Buy Shares)
2 For each account with a balance of less than $1000, the Fund charges a
monthly account maintenance fee of $3.00.
3 Expenses have been restated to reflect expenses expected to be incurred in
1999.


Annual Fund Operating Expenses
Expenses are based on expenses for the Fund's most recent fiscal year,
unless otherwise indicated. Management fees include the administrative fee
paid by the Fund to Calvert Administrative Services Company, an affiliate of
the Advisor, Calvert Asset Management Company, Inc. ("CAMCO").

Rule 12b-1 fees include an asset-based sales charge. Thus, long-term
shareholders in those Funds with such fees may pay more in total sales
charges than the economic equivalent of the maximum front-end sales charge
permitted by rules of the National Association of Securities Dealers, Inc.

Example
This example is intended to help you compare the cost of investing in a Fund
with the cost of investing in other mutual funds. The example assumes that:
o        You invest $10,000 in the Fund for the time periods indicated;
o        Your investment has a 5% return each year; and
o        The Fund's operating expenses remain the same.

Although your actual costs may be higher or lower, under these assumptions
your costs would be:

Portfolio         Number of Years Investment is Held
                  1 Year       3 Years      5 Years       10 Years
Money Market      $67          $211         $368          $822
Limited-Term      $174         $331         $502          $997
Long-Term         $462         $648         $850          $1,430

Principal Investment Practices and Risks
The most concise description of the principal investment strategies and
associated risks is under the earlier summary for each Fund. CTFR
Limited-Term and Long-Term are also permitted to invest in certain other
investments and to use certain investment techniques that have higher risks
associated with them. On the following pages are brief descriptions of the
investments and techniques, summarized earlier along with certain additional
investment techniques and their risks.

For each of the investment practices listed, the table below shows the
limitations for Limited -Term and Long-Term as a percentage of assets and
the principal types of risk involved. (See the pages following the table for
a description of the types of risks). Numbers in this table show maximum
allowable amount only; for actual usage, consult the annual/semi-annual
reports.


Key to Table
@        Fund currently uses
0        Permitted, but not typically used
(% of assets allowable, if restricted)
- --       Not permitted
xN       Allowed up to x% of fund's net assets
xT       Allowed up to x% of Fund's total assets
NA       Not applicable to this type of fund

Investment Practices
- ------------------------------------------ -------- --------
Temporary Defensive Positions.             0        0
During adverse market, economic or
political conditions, the Fund may
depart from its principal investment
strategies by increasing its investment
in U.S. government securities and other
short-term interest-bearing securities.
During times of any temporary defensive
positions, a Fund may not be able to
achieve its investment objective Risks:
Opportunity.
- ------------------------------------------ -------- --------

Conventional Securities:

- ------------------------------------------ -------- --------
Investment grade bonds. Bonds rated        @        @
BBB/Baa or higher or comparable unrated
bonds. Risks: Interest Rate, Market ,
Credit and Information.
- ------------------------------------------ -------- --------

<PAGE>

- ------------------------------------------ -------- --------
Below-investment grade bonds. Bonds        @        @
rated below BBB/Baa or comparable          15N      35N
unrated bonds, also known as high-yield
bonds. They are subject to greater
credit risk than investment grade bonds.
Risks: Credit, Market, Interest Rate,
Liquidity and Information.
- ------------------------------------------ -------- --------

- ------------------------------------------ -------- --------
Unrated debt securities. Bonds that have   @        @
not been rated by a recognized rating
agency; the Advisor has determined the
credit quality based on its own
research. Risks: Credit, Market,
Interest Rate, Liquidity and
Information.
- ------------------------------------------ -------- --------

- ------------------------------------------ -------- --------
Illiquid securities. Securities which      15N      15N
cannot be readily sold because there is
no active market. Risks: Liquidity,
Market and Transaction.
- ------------------------------------------ -------- --------

Unleveraged derivative securities

- ------------------------------------------ -------- --------
Asset-backed securities. Securities are    @        @
issued by a special purpose entity and
are backed by fixed-income or other
interest bearing assets.  Risks: Credit,
Interest Rate and Liquidity.
- ------------------------------------------ -------- --------

- ------------------------------------------ -------- --------
Mortgage-backed securities (typically,     @        @
single-family mortgage bonds).
Securities are backed by pools of
mortgages, including passthrough
certificates.  Risks: Credit, Extension,
Prepayment, Liquidity and Interest Rate.
- ------------------------------------------ -------- --------

Leveraged derivative instruments

- ------------------------------------------ -------- --------
Options on securities and indices.         NA       5N
Contracts giving the holder the right
but not the obligation to purchase or
sell a security (or the cash value, in
the case of an option on an index) at a
specified price within a specified time.
Any options written by the Fund must be
"covered". The limitation is based on
net premium payments. Risks: Interest
Rate, Market, Leverage, Correlation,
Liquidity, Credit and Opportunity.
- ------------------------------------------ -------- --------

<PAGE>

- ------------------------------------------ -------- --------
Futures contract. Agreement to buy or      NA       5N
sell a specific amount of a commodity or
financial instrument at a particular
price on a specific future date. Risks:
Interest Rate, Market, Leverage,
Correlation, Liquidity and Opportunity.
- ------------------------------------------ -------- --------

- ------------------------------------------ -------- --------
Structured securities. Inverse floating    NA       @
rate municipal notes and bonds.  These
securities tend to be highly sensitive
to interest rate movements.  Risks:
Credit, Interest Rate, Market, Leverage,
Liquidity and Correlation.
- ------------------------------------------ -------- --------

The Funds have additional investment policies and restrictions that are not
principal to their investment strategies (for example, repurchase
agreements, reverse repurchase agreements, borrowing, pledging, and
securities lending, and when-issued securities.) These policies and
restrictions are discussed in the SAI.


Types of Investment Risk

Correlation risk
This occurs when a Fund "hedges"- uses one investment to offset the Fund's
position in another. If the two investments do not behave in relation to one
another the way Fund managers expect them to, then unexpected or undesired
results may occur. For example, a hedge may eliminate or reduce gains as
well as offset losses.

Credit risk
The risk that the issuer of a security or the counterparty to an investment
contract may default or become unable to pay its obligations when due.

Extension risk
The risk that an unexpected rise in interest rates will extend the life of a
mortgage-backed security beyond the expected prepayment time, typically
reducing the security's value.

Information risk
The risk that information about a security or issuer or the market might not
be available, complete, accurate or comparable.

Interest rate risk
The risk that changes in interest rates will adversely affect the value of
an investor's securities. When interest rates rise, the value of
fixed-income securities will generally fall. Conversely, a drop in interest
rates will generally cause an increase in the value of fixed-income
securities. Longer-term securities and zero coupon/"stripped" coupon
securities ("strips") are subject to greater interest rate risk.

Leverage risk
The risk that occurs in some securities or techniques which tend to magnify
the effect of small changes in an index or a market. This can result in a
loss that exceeds the amount actually invested.

Liquidity risk
The risk that occurs when investments cannot be readily sold. A Fund may
have to accept a less-than-desirable price to complete the sale of an
illiquid security or may not be able to sell it at all.

Management risk
The risk that a Fund's portfolio management practices might not work to
achieve their desired result.

Market risk
The risk that securities prices in a market, a sector or an industry will
fluctuate, and that such movements might reduce an investment's value.

Opportunity risk
The risk of missing out on an investment opportunity because the assets
needed to take advantage of it are committed to less advantageous
investments or strategies.

Political risk
The risk that may occur with foreign investments, and means that the value
of an investment may be adversely affected by nationalization, taxation,
war, government instability or other economic or political actions or
factors.

Prepayment risk
The risk that unanticipated prepayments may occur, reducing the value of a
mortgage-backed security. The Fund must then reinvest those assets at the
current, market rate which may be lower.

Transaction risk
The risk that a Fund may be delayed or unable to settle a transaction or
that commissions and settlement expenses may be higher than usual.

CALVERT GROUP AND THE PORTFOLIO MANAGEMENT TEAM
Calvert Asset Management Company, Inc. (4550 Montgomery Avenue, Suite 1000N,
Bethesda, MD 20814) ("CAMCO") is the Funds' investment advisor and provides
day-to-day investment management services to the Funds. It has been managing
mutual funds since 1976. CAMCO is the investment advisor for over 25 mutual
funds, including the first and largest family of socially screened funds. As
of December 31, 1998, CAMCO had $6 billion in assets under management.

CAMCO uses a team approach to its management of the Fund. Since inception,
investment selections for the Fund have been made by a committee of the
Advisor's fixed-income portfolio managers. Reno J. Martini, Senior Vice
President and Chief Investment Officer of CAMCO, heads this team and
oversees the management of all Calvert Funds for CAMCO. Mr. Martini has over
18 years of experience in evaluating and purchasing municipal securities and
has been the head of CAMCO's asset management team since 1985.

ADVISORY FEES

The following table shows the aggregate annual advisory fee paid to CAMCO by
each Fund for the most recent fiscal year as a percentage of that Fund's
average daily net assets.

Fund                           Advisory Fee
CTFR Money Market              .20%
CTFR Limited-Term              .60%
CTFR Long Term                 .60%

A Word About the Year 2000 (Y2K) and Our Computer Systems
Like other mutual funds, CAMCO and its service providers use computer
systems for all aspects of our business -- processing shareholder and fund
transactions, fund accounting, executing trades, and pricing securities just
to name a few. Many current software programs cannot distinguish between the
year 2000 and the year 1900. This can cause problems with retirement plan
distributions, dividend payment software, transaction software, and numerous
other areas that could impact the Funds. Calvert Group has been reviewing
all of its computer systems for Y2K compliance. Although, at this time,
there can be no assurance that there will be no negative impact on the
Funds, the Advisor, the underwriter, transfer agent and custodian have
advised the Funds that they have been actively working on any necessary
changes to their computer systems to prepare for Y2K and expect that their
systems, and those of their outside service providers, will be adapted in
time for that event. For more information, please visit our website at
www.calvertgroup.com

HOW TO BUY SHARES

Getting Started - Before You Open an Account
You have a few decisions to make before you open an account in a mutual fund.

First, decide which fund or funds best suits your needs and your goals.

Second, decide what kind of account you want to open. Calvert offers
individual, joint, trust, Uniform Gifts/Transfers to Minor Accounts, and
several other types of accounts.

CTFR Money Market offers three classes of shares, all of which are sold
without a sales charge. Only CTFR Money Market Class O is offered by this
prospectus.

Shares of CTFR Limited-Term and Long-Term are sold with a front-end sales
charge.

Investors pay a sales charge at the time of each purchase. This table shows
the charges both as a percentage of offering price and as a percentage of
the amount you invest. The term "offering price" includes the front-end
sales charge. If you invest more, the sales charge will be lower. For
example, if you invest more than $50,000 in Limited-Term, or if your
cumulative purchases or the value in your account is more than $50,000,4
then the sales charge is reduced to .75%.

Limited-Term

Your investment                       Sales Charge as       % of Amount
                                      % of offering price   Invested
Less than $50,000                     1.00%                 1.01%
$50,000 but less than $100,000        0.75%                 0.76%
$100,000 but less than $250,000       0.50%                 0.50%
$250,000 and over                     None                  None

Long-Term

Your investment                       Sales Charge %        % of Amount
                                      of offering price     Invested
Less than $50,000                     3.75%                 3.90%
$50,000 but less than $100,000        3.00%                 3.09%
$100,000 but less than $250,000       2.25%                 2.30%
$250,000 but less than $500,000       1.75%                 1.78%
$500,000 but less than $1,000,000     1.00%                 1.01%
$1,000,000 and over                   None*                 None*



4 This is called "Rights of Accumulation." The sales charge is calculated by
taking into account not only the dollar amount of the new purchase of
shares, but also the higher of cost or current value of shares you have
previously purchased in Calvert Group Funds that impose sales charges. This
automatically applies to your account for each new purchase of shares.

* Purchases of CTFR Long-Term shares at NAV for accounts with $1,000,000 or
more are subject to a one year CDSC of 1.00%. See the "Calculation of
Contingent Deferred Sales Charge."

The front-end sales charge may be waived for certain purchases or investors,
such as participants in certain group retirement plans or other qualified
groups and clients of registered investment advisers. For details on these
and other purchases that may qualify for a reduced sales charge, see Exhibit
A.

Calculation of Contingent Deferred Sales Charge
The CDSC will not be charged on shares you received as dividends or from
capital gains distributions or on any capital appreciation (gain in the
value) of shares that are sold.

Shares that are not subject to the CDSC will be redeemed first, followed by
shares you have held the longest. The CDSC is calculated by determining the
share value at both the time of purchase and redemption and then multiplying
whichever value is less by the percentage that applies as shown above. If
you choose to sell only part of your shares, the capital appreciation for
those shares only is included in the calculation, rather than the capital
appreciation for the entire account.

Distribution and Service Fees
CTFR Long-Term has adopted a plan under Rule 12b-1 of the Investment Company
Act of 1940 that allows the Fund to pay distribution fees for the sale and
distribution of its shares. The distribution plan also pays service fees to
persons (such as your financial professional) for services provided to
shareholders. Because these fees are paid out of a Fund's assets on an
ongoing basis, over time, these fees will increase the cost of your
investment and may cost you more than paying other types of sales charges.
Please see Exhibit B for more service fee information.

The table below shows the maximum annual percentage payable under the
distribution plan, and the amount actually paid by each Fund for the most
recent fiscal year. The fees are based on average daily net assets.

 
Maximum Payable under Plan/Amount Actually Paid

CTFR Money Market              None/None
CTFR Limited-Term              None/None
CTFR Long-Term                 0.35%/0.09%

Next Step- Account Application
Complete and sign an application for each new account. For more information,
contact your broker or our shareholder services department at 800-368-2748.

Minimum To Open an Account                  Minimum additional
         $2,000                             investments -$250

Please make your check payable
to the Fund and mail it to:
         New Accounts                       Subsequent Investments
         (include application)              (include investment slip)
         Calvert Group                      Calvert Group
         P.O. Box 419544                    P.O. Box 419739
         Kansas, City MO                    Kansas City, MO
         64141-6544                         64141-6739

         Certified or          c/o NFDS
         Overnight Mail        330 West 9th St.
                               Kansas City, MO
                               64105-1807

         At the Calvert Office      Visit the Calvert Office to make
investments by check. See the back cover page for the address.

IMPORTANT - HOW SHARES ARE PRICED
The price of shares is based on each Fund's net asset value ("NAV"). NAV is
computed by adding the value of a Fund's holdings plus other assets,
subtracting liabilities, and then dividing the result by the number of
shares outstanding. If a Fund has more than one class of shares, the NAV of
each class will be different, depending on the number of shares outstanding
for each class.

Portfolio securities and other assets are valued based on market quotations,
except that securities maturing within 60 days are valued at amortized cost.
If market quotations are not readily available, securities are valued by a
method that the Fund's Board of Trustees/Directors believes accurately
reflects fair value. CTFR Money Market is valued according to the "amortized
cost" method, which is intended to stabilize the NAV at $1 per share.


The NAV is calculated as of the close of each business day, which coincides
with the closing of the regular session of the New York Stock Exchange
("NYSE") (normally 4 p.m. ET). Each Fund is open for business each day the
NYSE is open. Please note that there are some federal holidays, however,
such as Columbus Day and Veterans' Day, when the NYSE is open and the Fund
is open but purchases cannot be received because the banks are closed.

WHEN YOUR ACCOUNT WILL BE CREDITED
Your purchase will be processed at the NAV next calculated after your order
is received in good order. All of your purchases must be made in US dollars.
No cash will be accepted. No credit card or credit loan checks will be
accepted. Each Fund reserves the right to suspend the offering of shares for
a period of time or to reject any specific purchase order. As a convenience,
check purchases received at Calvert's office in Bethesda, Maryland will be
sent by overnight delivery to the Transfer Agent and will be credited the
next business day upon receipt. Any check purchase received without an
investment slip may cause delayed crediting. If your check does not clear
your bank, your purchase will be canceled and you will be charged a $25 fee
plus any costs incurred. All purchases will be confirmed and credited to
your account in full and fractional shares (rounded to the nearest 1/1000th
of a share).

CTFR Money Market
Your purchase will be credited at the net asset value calculated after your
order is received and accepted. If the Transfer Agent receives your wire
purchase by 5 p.m. ET, your account will begin earning dividends on the next
business day. Exchanges begin earning dividends the next business day after
the exchange request is received by mail or telephone. Purchases received by
check will begin earning dividends the next business day after they are
credited to the account.

OTHER CALVERT GROUP FEATURES

Calvert Information Network
For 24 hour performance and account information call 800-368-2745 or visit
http://www.calvertgroup.com

You can obtain current performance and pricing information, verify account
balances, and authorize certain transactions with the convenience of one
phone call, 24 hours a day.

Account Services
By signing up for services when you open your account, you avoid having to
obtain a signature guarantee. If you wish to add services at a later date, a
signature guarantee to verify your signature may be obtained from any bank,
trust company and savings and loan association, credit union, broker-dealer
firm or member of a domestic stock exchange. A notary public cannot provide
a signature guarantee.

Calvert Money Controller
Calvert Money Controller allows you to purchase or sell shares by electronic
funds transfer without the time delay of mailing a check or the added
expense of a wire. Use this service to transfer up to $300,000
electronically. Allow one or two business days after you place your request
for the transfer to take place. Money transferred to purchase new shares
will be subject to a hold of up to 10 business days before redemption
requests will be honored. Transaction requests must be received by 4 p.m.
ET. You may request this service on your initial account application.
Calvert Money Controller transactions returned for insufficient funds will
incur a $25 charge.

Telephone Transactions
You may purchase, redeem, or exchange shares, wire funds and use Calvert
Money Controller by telephone if you have pre-authorized service
instructions. You receive telephone privileges automatically when you open
your account unless you elect otherwise. For our mutual protection, the
Fund, the shareholder servicing agent and their affiliates use precautions
such as verifying shareholder identity and recording telephone calls to
confirm instructions given by phone. A confirmation statement is sent for
most transactions; please review this statement and verify the accuracy of
your transaction immediately.

Exchanges
Calvert Group offers a wide variety of investment options that includes
common stock funds, tax-exempt and corporate bond funds, and money market
funds (call your broker or Calvert representative for more information). We
make it easy for you to purchase shares in other Calvert funds if your
investment goals change. The exchange privilege offers flexibility by
allowing you to exchange shares on which you have already paid a sales
charge from one mutual fund to another at no additional charge.

Complete and sign an account application, taking care to register your new
account in the same name and taxpayer identification number as your existing
Calvert account(s). Exchange instructions may then be given by telephone if
telephone redemptions have been authorized and the shares are not in
certificate form.

Before you make an exchange, please note the following:
Each exchange represents the sale of shares of one Fund and the purchase of
shares of another. Therefore, you could realize a taxable gain or loss.


You may exchange shares acquired by reinvestment of dividends or
distributions into another Calvert Fund at no additional charge.

Shares may only be exchanged for shares of the same class of another Calvert
Fund.

No CDSC is imposed on exchanges of shares subject to a CDSC at the time of
the exchange. The applicable CDSC is imposed at the time the shares acquired
by the exchange are redeemed.

Shareholders (and those managing multiple accounts) who make two purchases
and two redemptions of shares of the same Fund during any six-month period
will be given written notice and may be prohibited from placing additional
investments. This policy does not prohibit a shareholder from redeeming
shares of any Fund, and does not apply to trades solely between money market
funds.

Each Fund reserves the right to terminate or modify the exchange privilege
with 60 days' written notice.

Combined General Mailings (Householding)
Multiple accounts with the same social security number will receive one
mailing per household of information such as prospectuses and semi-annual
and annual reports. You may request further grouping of accounts to receive
fewer mailings. Separate statements will be generated for each separate
account and will be mailed in one envelope for each combination above.

Special Services and Charges
Each Fund pays for shareholder services but not for special services that
are required by a few shareholders, such as a request for a historical
transcript of an account or a stop payment on a draft. You may be required
to pay a fee for these special services; for example, the fee for stop
payments is $25.

If you are purchasing shares through a program of services offered by a
broker/dealer or financial institution, you should read the program
materials together with this Prospectus. Certain features may be modified in
these programs. Investors may be charged a fee if they effect transactions
in Fund shares through a broker or agent.

Minimum Account Balance
Please maintain a balance in each of your accounts of at least $1,000 per
class. If the balance in your CTFR Money Market account falls below the
minimum during a month, a $3.00 monthly fee may be charged to your account.
If the balance in any of your accounts falls below the minimum during a
month, your account may be closed and the proceeds mailed to the address of
record. You will receive notice that your account is below the minimum, and
will be closed if the balance is not brought up to the required minimum
amount within 30 days.


DIVIDENDS, CAPITAL GAINS AND TAXES

Each Fund pays dividends from its net investment income as shown below. Net
investment income consists of interest income, net short-term capital gains,
if any, and dividends declared and paid on investments, less expenses.
Distributions of net short-term capital gains (treated as dividends for tax
purposes) and net long-term capital gains, if any, are normally paid once a
year; however, the Funds do not anticipate making any such distributions
unless available capital loss carryovers have been used or have expired.
Dividend and distribution payments will vary between classes.

CTFR Money Market          Accrued daily, paid monthly
CTFR Limited-Term          Paid monthly
CTFR Long-Term             Paid monthly

Dividend payment options
Dividends and any distributions are automatically reinvested in the same
Fund at NAV (without sales charge), unless you elect to have amounts of $10
or more paid in cash (by check or by Calvert Money Controller). Dividends
and distributions from any Calvert Group Fund may be automatically invested
in an identically registered account in any other Calvert Group Fund at NAV.
If reinvested in the same account, new shares will be purchased at NAV on
the reinvestment date, which is generally 1 to 3 days prior to the payment
date. You must notify the Funds in writing to change your payment options.
If you elect to have dividends and/or distributions paid in cash, and the US
Postal Service returns the check as undeliverable, it, as well as future
dividends and distributions, will be reinvested in additional shares. No
dividends will accrue on amounts represented by uncashed distribution or
redemption checks.

Buying a Dividend (Not Applicable to CTFR Money Market)
At the time of purchase, the share price of each class may reflect
undistributed income, capital gains or unrealized appreciation of
securities. Any income or capital gains from these amounts which are later
distributed to you are fully taxable. On the record date for a distribution,
share value is reduced by the amount of the distribution. If you buy shares
just before the record date ("buying a dividend") you will pay the full
price for the shares and then receive a portion of the price back as a
taxable distribution.


Federal Taxes
Dividends derived from interest on municipal obligations constitute
exempt-interest dividends, on which you are not subject to federal income
tax. However, dividends which are from taxable interest and any
distributions of short term capital gain are taxable to you as ordinary
income. If the Fund makes any distributions of long-term capital gains, then
these are taxable to you as long-term capital gains, regardless of how long
you held your shares of the Fund. Dividends attributable to interest on
certain private activity bonds must be included in federal alternative
minimum tax for individuals and for corporations. The Fund may invest in and
derive up to 20% of its income from taxable  investments, for liquidity
purposes or pending investment. Interest earned from taxable investments
will be taxable as ordinary income.

If any taxable income or gains are paid, in January, the Fund will mail you
Form 1099-DIV indicating the federal tax status of dividends and any capital
gain distributions paid to you during the past year. Generally, dividends
and distributions are taxable in the year they are paid. However, any
dividends and distributions paid in January but declared during the prior
three months are taxable in the year declared. Dividends and distributions
are taxable to you regardless of whether they are taken in cash or
reinvested.

CTFR Limited-Term and Long-Term Only:
You may realize a capital gain or loss when you sell or exchange shares.
This capital gain or loss will be short- or long-term, depending on how long
you have owned the shares which were sold. In January, these Funds will mail
you Form 1099-B indicating the total amount of all sales, including
exchanges. You should keep your annual year-end account statements to
determine the cost (basis) of the shares to report on your tax returns.

Other Tax Information
You may be subject to state or local taxes on your investment, depending on
the laws in your area. A letter will be mailed to you in January detailing
the percentage invested in your state the previous tax year. Such dividends
may be exempt from certain state income taxes.

Taxpayer Identification Number
If we do not have your correct Social Security or Taxpayer Identification
Number ("TIN") and a signed certified application or Form W-9, Federal law
requires us to withhold 31% of your reportable dividends, and possibly 31%
of certain redemptions. In addition, you may be subject to a fine by the
Internal Revenue Service. You will also be prohibited from opening another
account by exchange. If this TIN information is not received within 60 days
after your account is established, your account may be redeemed (closed) at
the current NAV on the date of redemption. Calvert Group reserves the right
to reject any new account or any purchase order for failure to supply a
certified TIN.
HOW TO SELL SHARES

You may redeem all or a portion of your shares on any day your Fund is open
for business, provided the amount requested is not on hold. When you
purchase by check or with Calvert Money Controller (electronic funds
transfer), the purchase will be on hold for up to 10 business days from the
date of receipt. During the hold period, redemptions proceeds will not be
sent until the Transfer Agent is reasonably satisfied that the purchase
payment has been collected. Drafts written on CTFR Money Market during the
hold period will be returned for uncollected funds.

Your shares will be redeemed at the next NAV calculated after your
redemption request is received (less any applicable CDSC). The proceeds will
normally be sent to you on the next business day, but if making immediate
payment could adversely affect your Fund, it may take up to seven (7) days
to make payment. Calvert Money Controller redemptions generally will be
credited to your bank account by the second business day after your phone
call. The Funds have the right to redeem shares in assets other than cash
for redemption amounts exceeding, in any 90-day period, $250,000 or 1% of
the net asset value of the affected Fund, whichever is less. When the NYSE
is closed (or when trading is restricted) for any reason other than its
customary weekend or holiday closings, or under any emergency circumstances
as determined by the Securities and Exchange Commission, redemptions may be
suspended or payment dates postponed. Please note that there are some
federal holidays, however, such as Columbus Day and Veterans' Day, when the
NYSE is open and the Fund is open but redemptions cannot be mailed or wired
because the post offices and banks are closed.

Follow these suggestions to ensure timely processing of your redemption
request:

By Telephone
You may redeem shares from your account by telephone and have your money
mailed to your address of record or electronically transferred or wired to a
bank you have previously authorized. A charge of $5 may be imposed on wire
transfers of less than $1,000.

Written Requests
Calvert Group, P.O. Box 419544, Kansas City, MO 64141-6544
Your letter should include your account number and fund and the number of
shares or the dollar amount you are redeeming. Please provide a daytime
telephone number, if possible, for us to call if we have questions. If the
money is being sent to a new bank, person, or address other than the address
of record, your letter must be signature guaranteed.


Draftwriting (CTFR Money Market only)
You may redeem shares in your CTFR Money Market account by writing a draft
for at least $250. If you complete and return the signature card for
Draftwriting, the Fund will mail bank drafts to you, printed with your name
and address. Drafts may not be ordered until your initial purchase has
cleared. Calvert will provide printed drafts (checks). You may not print
your own. Any customer-printed checks will not be honored and will be
returned without notice. The Fund will charge a service fee for drafts
returned for insufficient funds. The Fund will charge $25 for any stop
payment on drafts. The Fund will charge a $25 fee on drafts returned for any
reason. As a service to shareholders, shares may be automatically
transferred between your Calvert accounts to cover drafts you have written.
The signature of only one authorized signer is required to honor a draft.

Systematic Check Redemptions
If you maintain an account with a balance of $10,000 or more, you may have
up to two (2) redemption checks for a fixed amount sent to you on the 15th
of the month, simply by sending a letter with all information, including
your account number, and the dollar amount ($100 minimum). If you would like
a regular check mailed to another person or place, your letter must be
signature guaranteed. Shares subject to the one-year CDSC which are redeemed
by  Systematic Check Redemption will be charged the CDSC.

Corporations and Associations
Your letter of instruction and corporate resolution should be signed by
person(s) authorized to act on the account, accompanied by signature
guarantee(s).

Trusts
Your letter of instruction should be signed by the Trustee(s) (as
Trustee(s)), with a signature guarantee. (If the Trustee's name is not
registered on your account, please provide a copy of the trust document,
certified within the last 60 days.)

Through your Dealer
Your dealer must receive your request before the close of regular trading on
the NYSE to receive that day's NAV. Your dealer will be responsible for
furnishing all necessary documentation to Calvert Group and may charge you
for services provided.

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the Funds'
financial performance for the past 5 years (or if shorter, the period of the
Fund's operations). Certain information reflects financial results for a
single share, by Fund and Class. The total returns in the table represent
the rate that an investor would have earned (or lost) on an investment in a
Fund (assuming reinvestment of all dividends and distributions), and does
not reflect any applicable front- or back-end sales charge. This information
has been audited by PricewaterhouseCoopers LLP whose report, along with a
Fund's financial statements, are included in the Fund's annual report, which
is available upon request.

MONEY MARKET PORTFOLIO
FINANCIAL HIGHLIGHTS

                                             Years Ended
                            December 31,      December 31,     December 31,
Class O Shares                      1998              1997             1996
Net asset value, beginning         $1.00             $1.00            $1.00
Income from investment operations
     Net investment income          .032              .033             .033
Distributions from
     Net investment income        (.032)            (.033)           (.033)
Net asset value, ending            $1.00             $1.00            $1.00

Total return*                      3.22%             3.38%            3.33%
Ratios to average net assets:
     Net investment income         3.17%             3.32%            3.28%
     Total expenses +               .65%              .65%             .65%
     Net expenses                   .64%              .64%             .64%
Net assets, ending
     (in thousands)           $1,355,322        $1,405,350       $1,550,731
Number of shares outstanding,
     ending (in thousands)     1,355,203         1,405,404        1,550,724


                                      Years Ended
                            December 31,      December 31,
Class O Shares                      1995              1994
Net asset value, beginning         $1.00             $1.00
Income from investment operations
     Net investment income          .040              .028
Distributions from
     Net investment income        (.040)            (.028)
Net asset value, ending            $1.00             $1.00

Total return*                      4.02%             2.81%
Ratios to average net assets:
     Net investment income         3.93%             2.75%
     Total expenses +               .62%                --
     Net expenses                   .61%              .62%
Net assets, ending
     (in thousands)           $1,740,839        $1,344,595
Number of shares outstanding,
     ending (in thousands)     1,740,948         1,344,668

<PAGE>

LIMITED-TERM PORTFOLIO
FINANCIAL HIGHLIGHTS

                                             Years Ended
                            December 31,      December 31,     December 31,
                                    1998              1997             1996
Net asset value, beginning        $10.70            $10.69           $10.72
Income from investment operations
    Net investment income            .40               .42              .44
    Net realized and unrealized
    gain (loss)                      .01               .01            (.03)
       Total from investment
       operations                    .41               .43              .41
Distributions from
    Net investment income          (.40)             (.42)            (.44)
Total increase (decrease)
    in net asset value               .01               .01            (.03)
Net asset value, ending           $10.71            $10.70           $10.69

Total return*                      3.87%             4.07%            3.94%
Ratios to average net assets:
    Net investment income          3.70%             3.91%            4.12%
    Total expenses +                .71%              .70%             .71%
    Net expenses                    .70%              .69%             .70%
Portfolio turnover                   45%               52%              45%
Net assets, ending
    (in thousands)              $547,212          $490,180         $512,342
Number of shares outstanding,
    ending (in thousands)         51,073            45,808           47,922


                                     Years Ended
                            December 31,      December 31,
                                    1995              1994
Net asset value, beginning        $10.59            $10.72
Income from investment operations
    Net investment income            .45               .39
    Net realized and unrealized
    gain (loss)                      .13             (.13)
        Total from investment
        operations                   .58               .26
Distributions from
    Net investment income          (.45)             (.39)
Total increase (decrease) in
    net asset value                  .13             (.13)
Net asset value, ending           $10.72            $10.59

Total return*                      5.55%             2.42%
Ratios to average net assets:
    Net investment income          4.21%             3.60%
    Total expenses +                .71%                --
    Net expenses                    .70%              .66%
Portfolio turnover                   33%               27%
Net assets, ending
    (in thousands)              $457,707          $544,822
Number of shares outstanding,
    ending (in thousands)         42,690            51,424

<PAGE>

LONG-TERM PORTFOLIO
FINANCIAL HIGHLIGHTS

                                             Years Ended
                            December 31,      December 31,     December 31,
                                    1998              1997             1996
Net asset value, beginning        $17.28            $16.81           $17.31
Income from investment operations
    Net investment income            .78               .87              .93
    Net realized and unrealized
    gain (loss)                      .06               .50            (.46)
        Total from investment
        operations                   .84              1.37              .47
Distributions from
    Net investment income          (.80)             (.87)            (.95)
    Net realized gains             (.51)             (.03)            (.02)
        Total distributions       (1.31)             (.90)            (.97)
Total increase (decrease) in
    net asset value                (.47)               .47            (.50)
Net asset value, ending           $16.81            $17.28           $16.81

Total return *                     5.01%             8.41%            2.89%
Ratios to average net assets:
    Net investment income          4.58%             5.16%            5.50%
    Total expenses +                .87%              .87%             .89%
    Net expenses                    .84%              .85%             .86%
Portfolio turnover                   72%               41%              41%
Net assets, ending
    (in thousands)               $57,677           $50,966          $52,945
Number of shares outstanding,
    ending (in thousands)          3,431             2,950            3,149

                                      Years Ended
                            December 31,      December 31,
                                    1995              1994
Net asset value, beginning        $15.83            $17.15
Income from investment operations
    Net investment income            .95               .93
    Net realized and unrealized
    gain (loss)                     1.53            (1.33)
        Total from investments      2.48             (.40)
Distributions from
    Net investment income          (.91)             (.92)
    Net realized gains             (.09)                --
        Total distributions       (1.00)             (.92)
Total increase (decrease) in
    net asset value                 1.48            (1.32)
Net asset value, ending           $17.31            $15.83

Total return *                    16.05%           (2.30%)
Ratios to average net assets:
    Net investment income          5.71%             5.73%
    Total expenses +                .87%                --
    Net expenses                    .85%              .81%
Portfolio turnover                   58%               98%
Net assets, ending (in thousands)$57,359           $47,267
Number of shares outstanding,
    ending (in thousands)          3,314             2,985

(a)      Annualized
*        Total return does not reflect deduction of Class A front-end sales
charge.
+        Effective December 31, 1995, this ratio reflects total expenses
before reduction for fees paid indirectly; such reductions are included in
the ratio of net expenses. Total expenses are presented net of expense
waivers and reimbursements.
^        From October 2, 1995 inception.


EXHIBIT A
REDUCED SALES CHARGES -- (CTFR Limited-Term and CTFR Long-Term)

You may qualify for a reduced sales charge through several purchase plans
available. You must notify the Fund at the time of purchase to take
advantage of the reduced sales charge.

Rights of Accumulation can be applied to several accounts
The sales charge breakpoints are automatically calculated for each account
based on the higher of cost or current value of shares previously purchased.
This privilege can be applied to a family group or other qualified group*
upon request. Shares could then be purchased at the reduced sales charge
which applies to the entire group; that is, based on the higher of cost or
current value of shares previously purchased and currently held by all the
members of the group.

Letter of Intent
If you (or your group, as described above) plan to purchase $50,000 or more
of Calvert Fund shares over the next 13 months, your sales charge may be
reduced through a "Letter of Intent." You pay the lower sales charge
applicable to the total amount you plan to invest over the 13-month period,
excluding any money market portfolio purchases. Part of your shares will be
held in escrow, so that if you do not invest the amount indicated, you will
have to pay the sales charge applicable to the smaller investment actually
made. For more information, see the SAI.

Neither the Funds, nor Calvert Distributors, Inc. ("CDI"), nor any affiliate
thereof will reimburse a plan or participant for any sales charges paid
prior to receipt of such written communication and confirmation by Calvert
Group. Plan administrators should send requests for the waiver of sales
charges based on the above conditions to: Calvert Group Retirement Plans,
4550 Montgomery Avenue, Suite 1000N, Bethesda, Maryland 20814.

* A "qualified group" is one which:
1. has been in existence for more than six months, and
2. has a purpose other than acquiring shares at a discount, and
3. satisfies uniform criteria which enable CDI and brokers offering shares
to realize economies of scale in distributing such shares.

A qualified group must have more than 10 members, must be available to
arrange for group meetings between representatives of CDI or brokers
distributing shares, must agree to include sales and other materials related
to the Funds in its publications and mailings to members at reduced or no
cost to CDI or brokers. A pension plan is not a qualified group for rights
of accumulation.
Other Circumstances
There is no sales charge on shares of any Fund of the Calvert Group of Funds
sold to (i) current or retired Directors, Trustees, or Officers of the
Calvert Group of Funds, employees of Calvert Group, Ltd. and its affiliates,
or their family members; (ii) CSIF Advisory Council Members, directors,
officers, and employees of any subadvisor for the Calvert Group of Funds,
employees of broker/dealers distributing the Fund's shares and immediate
family members of the Council, subadvisor, or broker/dealer; (iii) Purchases
made through a Registered Investment Advisor; (iv) Trust departments of
banks or savings institutions for trust clients of such bank or institution,
(v) Purchases through a broker maintaining an omnibus account with the Fund,
provided the purchases are made by (a) investment advisors or financial
planners placing trades for their own accounts (or the accounts of their
clients) and who charge a management, consulting, or other fee for their
services; or (b) clients of such investment advisors or financial planners
who place trades for their own accounts if such accounts are linked to the
master account of such investment advisor or financial planner on the books
and records of the broker or agent; or (c) retirement and deferred
compensation plans and trusts, including, but not limited to, those defined
in section 401(a) or section 403(b) of the I.R.C., and "rabbi trusts."

Established Accounts
Shares of the Long-Term Portfolio may be sold at net asset value to you if
your account was established on or before September 15, 1987, or April 30,
1988, for the Limited-Term Portfolio.

Dividends and Capital Gain Distributions from other Calvert Group Funds
You may prearrange to have your dividends and capital gain distributions
from another Calvert Group Fund automatically invested in another account
with no additional sales charge.

Purchases made at NAV
Except for money market funds, if you make a purchase at NAV, you may
exchange that amount to another Calvert Group Fund at no additional sales
charge.

Reinstatement Privilege
If you redeem shares and then within 30 days decide to reinvest in the same
Fund, you may do so at the net asset value next computed after the
reinvestment order is received, without a sales charge. You may use the
reinstatement privilege only once. The Funds reserve the right to modify or
eliminate this privilege.
EXHIBIT B
Service Fees and Arrangements With Dealers

Calvert Distributors, Inc., each Fund's underwriter, pays dealers a
commission, or reallowance (expressed as a percentage of the offering price)
when you purchase shares. CDI also pays dealers an ongoing service fee while
you own shares of a Fund (expressed as an annual percentage rate of average
daily net assets held in Calvert accounts by that dealer). The table below
shows the amount of payment which differs depending on the Class.

                               Maximum Commission/Service Fees

CTFR Money Market              None/0.25%
CTFR Limited-Term              1.00%/0.15%
CTFR Long-Term                 3.00%/0.25%**

**If finder's fee is paid (see below), CTFR Long-Term Service fee begins
13th month after purchase.

Occasionally, CDI may reallow to dealers the full front-end sales charge.
CDI may also pay additional concessions, including non-cash promotional
incentives, such as merchandise or trips, to brokers employing registered
representatives who have sold or are expected to sell a minimum dollar
amount of shares of the Funds and/or shares of other Funds underwritten by
CDI. CDI may make expense reimbursements for special training of a broker's
registered representatives, advertising or equipment, or to defray the
expenses of sales contests. CAMCO, CDI, or their affiliates may pay certain
broker-dealers and/or other persons, for the sale and distribution of the
securities or for services to the Fund. Payments may include additional
compensation based on assets held through that firm beyond the regularly
scheduled rates, and finder's fees. CDI pays dealers a finder's fee on CTFR
Long-Term shares purchased at NAV in accounts with $1 million or more. The
CTFR Long-Term finder's fee is 1% of the NAV purchase amount on the first $2
million, .80% on $2 to $3 million, .50% on $3 to $50 million, .25% on $50 to
$100 million, and .15 over $100 million. CDI also pays dealers a finder's
fee on CTFR Limited-Term shares purchased at NAV in accounts with $250,000
or more. The CTFR Limited-Term Finder's fee is 0.10% of the NAV purchase
amount. CDI reserves the right to recoup any portion of the amount paid to
the dealer if the investor redeems some or all of the shares from the Funds
within 12 months of the date of purchase. All payments will be in compliance
with the rules of the National Association of Securities Dealers, Inc.


To Open an Account:
800-368-2748
Performance and Prices:
Calvert Information Network
24 hours, 7 days a week
800-368-2745

Service for Existing Accounts:
Shareholders 800-368-2745
Brokers 800-368-2746

TDD for Hearing-Impaired:
800-541-1524

Branch Office:
4550 Montgomery Avenue
Suite 1000N
Bethesda, Maryland 20814

Registered, Certified or
Overnight Mail:
Calvert Group
c/o NFDS
330 West 9th Street
Kansas City, MO 64105

Calvert Group Web-Site
Address: http://www.calvertgroup.com

PRINCIPAL UNDERWRITER
Calvert Distributors, Inc.
4550 Montgomery Avenue
Suite 1000N
Bethesda, Maryland 20814
For investors who want more information about the Funds, the following
documents are available free upon request:

Annual/Semi-Annual Reports: Additional information about each Fund's
investments is available in the Fund's Annual and Semi-Annual reports to
shareholders. In each Fund's annual report, you will find a discussion of
the market conditions and investment strategies that significantly affected
the Fund's performance during its last fiscal year.

Statement of Additional Information (SAI): The SAI for each Fund provides
more detailed information about the Fund and is incorporated into this
prospectus by reference.

You can get free copies of reports and SAIs, request other information and
discuss your questions about the Funds by contacting your broker, or the
Funds at:

Calvert Group
4550 Montgomery Ave, Suite 1000N
Bethesda, Md. 20814

Telephone: 1-800-368-2745

Calvert Group Web-Site
Address: http://www.calvertgroup.com

You can review the Funds' reports and SAIs at the public Reference Room of
the Securities and Exchange Commission. You can get text only copies:

o        For a fee, by writing to or calling the Public Reference Room of
the Commission, Washington, D.C. 20549-6009, Telephone: 1-800-SEC-0330.

o        Free from the Commission's Internet website at http://www.sec.gov.

Investment Company Act file:        no. 811-3101 (CTFR)



<PAGE>
PROSPECTUS
April 30, 1999

CALVERT TAX-FREE RESERVES (CTFR)
Money Market Portfolio Institutional Class






About the Fund
2        Investment objective, strategy, past performance
3        Fees and Expenses

About Your Investment
3        Calvert Group
3        Advisory Fees
4        How to Buy Shares
4        Other Calvert Group Features
         (Exchanges, Minimum Account Balance, etc.)
5        Dividends, Capital Gains and Taxes
6        How to Sell Shares
7        Financial Highlights







These securities have not been approved or disapproved by the Securities and
Exchange Commission (SEC) or any State Securities Commission, nor has the
SEC or any State Securities Commission passed on the accuracy or adequacy of
this prospectus. Any representation to the contrary is a criminal offense.

Investment Objective, Strategy and Past Performance

Objective
CTFR Money Market (the "Fund") seeks to earn the highest level of interest
income, exempt from federal income taxes, as is consistent with prudent
investment management, preservation of capital, and the quality and maturity
characteristics of the Fund.

Principal Investment Strategies and Related Risks
The Fund invests in fixed and floating rate municipal bonds and notes,
variable rate demand notes, tax-exempt commercial paper, and other high
quality, short-term municipal obligations. The Advisor looks for securities
with strong credit quality that are attractively priced. This may include
investments with unusual features or privately placed issues that are not
widely followed in the fixed income marketplace. All investments must comply
with the SEC money market fund (Rule 2a-7) requirements.

Many of the instruments held by the Fund are supported by letters of credit
issued by banks; thus, the Fund has a wide exposure to the banking industry.

The Fund may purchase securities that have not been rated by a rating
agency, so long as the Advisor determines they are of comparable credit
quality.

Unrated and privately placed securities may be less liquid than those that
are rated or have an active trading market.

The Fund's yield will change in response to market interest rates. In
general, as market rates go up so will the Fund's yield, and vice versa.
Although the Fund tries to keep the value of its shares constant at $1.00
per share, extreme changes in market rates, and or sudden credit
deterioration of a holding could cause the value to decrease. The Fund
limits the amount it invests in any one issuer to try to lessen its exposure.

An investment in the Fund is not a bank deposit and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other
government agency. Although the Fund seeks to preserve the value of your
investment at $ 1.00 per share, it is possible to lose money by investing in
the Fund.


CTFR Money Market Institutional Class Performance
The bar chart and table below show the Institutional Class' annual returns
and its long-term performance. The chart and table provide some indication
of the risks of investing in the Fund. The chart shows how the performance
has varied from year to year. The table compares its returns over time to
the Lipper Institutional Tax-Exempt Money Market Funds Index, a composite
index of the annual return of mutual funds that have an investment goal
similar to that of the Fund. The Fund's past performance does not
necessarily indicate how the Fund will perform in the future.

[BAR CHART]
1998              3.58%


Average Annual Total Returns (as of 12.31.98)

                                    1 year       5 years      Since
                                                              Inception*
CTFR Money Market
Institutional                       3.58%        N/A          3.63%
Lipper Institutional Tax-Exempt
Money Market Funds Index            3.24%        N/A          3.31%



Best Quarter (of periods shown)     Q2 '98  0.95%
Worst Quarter (of periods shown)    Q4 '98  0.85%

*Fund inception 8/31/97.

For current yield information on the Institutional Class call 800-317-2274,
or
visit Calvert Group's website at www.calvertgroup.com/institutional


FEES AND EXPENSES
This table describes the fees and expenses that you may pay if you buy and
hold shares of a Fund. Shareholder fees are paid directly from your account;
annual Fund operating expenses are deducted from Fund assets.

     Maximum sales charge (load)                 None
     imposed on purchases

     Maximum deferred sales charge (load)        None

     Annual fund operating expenses
     Management fees                             .25
     Distribution and service (12b-1) fees       None
     Other expenses 1                            .06
     Total annual fund operating expenses        .31

1 Expenses have been restated to reflect expenses expected to be incurred in
1999.

Annual Fund Operating Expenses
Expenses are based on expenses for the Fund's most recent fiscal year,
unless otherwise indicated. Management fees include the administrative fee
paid by the Fund to Calvert Administrative Services Company, an affiliate of
the Advisor, Calvert Asset Management Company, Inc. ("CAMCO").

Example
This example is intended to help you compare the cost of investing in a Fund
with the cost of investing in other mutual funds. The example assumes that:

o        You invest $1,000,000 in the Fund for the time periods indicated;
o        Your investment has a 5% return each year; and
o        The Fund's operating expenses remain the same.

Although your actual costs may be higher or lower, under these assumptions
your costs would be:

                           Number of Years Investment is Held

                           1 Year       3 Years      5 Years      10 Years
CTFR Money Market
Institutional Class        $3,173       $9,971       $17,423      $39,333


About Calvert Group
CAMCO (4550 Montgomery Avenue, Suite 1000N, Bethesda, MD 20814) is the
Funds' investment advisor and provides day-to-day investment management
services to the Funds. It has been managing mutual funds since 1976. CAMCO
is the investment advisor for over 25 mutual funds. As of December 31, 1998,
CAMCO had $6 billion in assets under management.

Advisory Fees
The aggregate annual advisory fee paid to CAMCO by the Fund for the most
recent fiscal year as a percentage of that Fund's average daily net assets
was 20%.

A Word About the Year 2000 (Y2K) and Our Computer Systems
Like other mutual funds, Calvert and its service providers use computer
systems for all aspects of our business -- processing shareholder and fund
transactions, fund accounting, executing trades, and pricing securities,
just to name a few. Many current software programs cannot distinguish
between the year 2000 and the year 1900. This can cause problems with
retirement plan distributions, dividend payment software, transaction
software, and numerous other areas that could impact the Funds. Calvert has
been reviewing all of its computer systems for Y2K compliance. Although, at
this time, there can be no assurance that there will be no negative impact
on the Funds, the Advisor, the underwriter, transfer agent and custodian
have advised the Funds that they have been actively working on any necessary
changes to their computer systems to prepare for Y2K and expect that their
systems, and those of their outside service providers, will be adapted in
time for that event. For more information, please visit our website at
www.calvertgroup.com


SHAREHOLDER GUIDE

HOW TO BUY SHARES
Complete and sign an application for each new account. For more information,
please contact the Calvert Institutional Marketing Group at 800-317-2274.

The minimum initial investment and minimum balance required is $1,000,000.
The minimum for subsequent investments is $25,000. Investments may be made
by wire or by exchange from another Calvert Group account.

Send your wire to:

ABA#011000028
FBO: CTFR Money Market Instit. Fund 718
Wire Account #9903-765-7
Insert your name and account number here
State Street Bank & Trust Company
Boston, Massachusetts

Important - How Shares are Priced
The price of shares is based on the Fund's net asset value ("NAV"). NAV is
computed by adding the value of the Fund's holdings plus other assets,
subtracting liabilities, and then dividing the result by the number of
shares outstanding.

The Fund is valued according to the "amortized cost" method, which is
intended to stabilize the NAV at $1 per share.

The NAV is calculated as of the close of each business day, which coincides
with the closing of the regular session of the New York Stock Exchange
("NYSE") (normally 4 p.m. ET). The Fund is open for business each day the
NYSE is open. Please note that there are some federal holidays, however,
such as Columbus Day and Veterans' Day, when the NYSE is open and the Fund
is open but purchases cannot be received because the banks are closed.

When Your Account Will Be Credited
Your purchase will be processed at the NAV calculated after your order is
received and accepted. A telephone order placed to Calvert Institutional
Marketing Group by 11:00 a.m. Eastern time will receive the dividend on Fund
shares declared that day if federal funds are received by the custodian by 5
p.m. Eastern time. Telephone orders placed after 11:00 a.m. will begin
earning dividends on Fund shares the next business day. If no telephone
order is placed, investments begin earning dividends the next business day.
Exchanges begin earning dividends the next business day after the exchange
request is received by mail or telephone.

All of your purchases must be made by wire. No cash or checks will be
accepted. The Fund reserves the right to suspend the offering of shares for
a period of time or to reject any specific purchase order.

OTHER CALVERT GROUP FEATURES

Calvert Information Network
For 24 hour performance and account information or visit
http://www.calvertgroup.com /institutional
You can obtain current performance and pricing information, verify account
balances, and authorize certain transactions with the convenience of one
phone call, 24 hours a day.

Account Services
By signing up for services when you open your account, you avoid having to
obtain a signature guarantee. If you wish to add services at a later date, a
signature guarantee to verify your signature may be obtained from any bank,
trust company and savings and loan association, credit union, broker-dealer
firm or member of a domestic stock exchange. A notary public cannot provide
a signature guarantee.

Telephone Transactions
You may redeem by exchange of shares or by wire. Institutional Class
accountholders receive telephone privileges automatically when you open your
account. For our mutual protection, the Fund, the shareholder servicing
agent and their affiliates use precautions such as verifying shareholder
identity and recording telephone calls to confirm instructions given by
phone. A confirmation statement is sent for most transactions; please review
this statement and verify the accuracy of your transaction immediately.

Calvert Money Controller
Calvert Money Controller allows you to purchase or sell shares by electronic
funds transfer without the time delay of mailing a check or the added
expense of a wire. Use this service to transfer up to $300,000
electronically. Allow one or two business days after you place your request
for the transfer to take place. Money transferred to purchase new shares
will be subject to a hold of up to 10 business days before redemption
requests will be honored. Transaction requests must be received by 4 p.m.
ET. You may request this service on your initial account application.
Calvert Money Controller transactions returned for insufficient funds will
incur A $25 charge.

Exchanges
Calvert Group offers a wide variety of investment options that includes
common stock funds, tax-exempt and corporate bond funds, and money market
funds. We make it easy for you to purchase shares in other Calvert funds if
your investment goals change. The exchange privilege offers flexibility by
allowing you to exchange shares on which you have already paid a sales
charge from one mutual fund to another at no additional charge.

Complete and sign an account application, taking care to register your new
account in the same name and taxpayer identification number as your existing
Calvert account(s). Exchange instructions may then be given by telephone if
telephone redemptions have been authorized.

Before you make an exchange, please note the following: Each exchange
represents the sale of shares of one Fund and the purchase of shares of
another.

You may exchange shares acquired by reinvestment of dividends or
distributions into another Calvert Fund at no additional charge.

Shares may only be exchanged for shares of the same class of another Calvert
Fund.

The Fund reserves the right to terminate or modify the exchange privilege
with 60 days' written notice.

Combined General Mailings (Householding)
Multiple accounts with the same tax identification number will receive one
mailing per household of information such as prospectuses and semi-annual
and annual reports. You may request further grouping of accounts to receive
fewer mailings. Separate statements will be generated for each separate
account and will be mailed in one envelope for each combination above.

Special Services and Charges
The Fund pays for shareholder services but not for special services that are
required by a few shareholders, such as a request for a historical
transcript of an account . You may be required to pay a fee for these
special services.

If you are purchasing shares through a program of services offered by a
broker/dealer or financial institution, you should read the program
materials together with this Prospectus. Certain features may be modified in
these programs, and the broker/dealer or financial institution may impose
charges for their services.

Minimum Account Balance
Please maintain a balance in your account of at least $1,000,000 per Fund.
If the account falls below the minimum you may be given a notice that your
account is below the minimum and will be moved to Class O if the balance is
not brought up to the required minimum amount.

DIVIDENDS, CAPITAL GAINS AND TAXES

The Fund accrues dividends daily from its net investment income, and pays
the dividends monthly. Net investment income consists of interest income,
net short-term capital gains, if any, and dividends declared and paid on
investments, less expenses. Distributions of net short-term capital gains
(treated as dividends for tax purposes) and net long-term capital gains, if
any, are normally paid once a year; however, the Fund does not anticipate
making any such distributions unless available capital loss carryovers have
been used or have expired.

Dividend Payment Options
Dividends and any distributions are automatically reinvested in the same
Fund at NAV (without sales charge), unless you elect to have amounts of $10
or more paid in cash by wire to a predesignated bank account. Dividends and
distributions from any Calvert Group Fund may be automatically invested in
an identically registered account in any other Calvert Group Fund at NAV. If
reinvested in the same account, new shares will be purchased at NAV on the
reinvestment date, which is generally I to 3 days prior to the payment date.
You must notify the Fund in writing to change your payment options.

Federal Taxes
Dividends derived from interest on municipal obligations constitute
exempt-interest dividends, on which you are not subject to federal income
tax. However, dividends which are from taxable interest and any
distributions of short term capital gain are taxable to you as ordinary
income. If the Fund makes any distributions of long-term capital gains, then
these are taxable to you as long-term capital gains, regardless of how long
you held your shares of the Fund. Dividends attributable to interest on
certain private activity bonds must be included in federal alternative
minimum tax for individuals and for corporations. The Fund may invest in and
derive up to 20% of its income from taxable short-term money market
investments, for liquidity purposes or pending investment. Interest earned
from taxable investments will be taxable as ordinary income.

If any taxable income or gains are paid, in January, the Fund will mail you
Form 1 099-DIV indicating the federal tax status of dividends and any
capital gain distributions paid to you during the past year. Generally,
dividends and distributions are taxable in the year they are paid. However,
any dividends and distributions paid in January but declared during the
prior three months are taxable in the year declared. Dividends and
distributions are taxable to you regardless of whether they are taken in
cash or reinvested.

Other Tax Information
You may be subject to state or local taxes on your investment, depending on
the laws in your area. A letter will be mailed to you in January detailing
the percentage invested in your state the previous tax year. Such dividends
may be exempt from certain state income taxes.

Taxpayer Identification Number
If we do not have your correct Social Security or Taxpayer Identification
Number ("TIN") and a signed certified application or Form W-9, Federal law
requires us to withhold 31% of your reportable dividends, and possibly 31%
of certain redemptions. In addition, you may be subject to a fine by the
Internal Revenue Service. You will also be prohibited from opening another
account by exchange. If this TIN information is not received within 60 days
after your account is established, your account may be redeemed (closed) at
the current NAV on the date of redemption. Calvert Group reserves the right
to reject any new account or any purchase order for failure to supply a
certified TIN.

HOW TO SELL SHARES

You may redeem all or a portion of your shares on any day the Fund is open
for business. Your shares will be redeemed at the next NAV calculated after
your redemption request is received and accepted in good order (see below).
You will receive dividends through the date the request is received and
processed. A telephone order for a redemption must be received by the
Calvert Institutional Marketing Group by 11:00 a.m. Eastern time in order
for the proceeds to be sent to you on the same business day. If making
immediate payment could adversely affect the Fund, it may take up to seven
(7) days to make payment. The Fund has the right to redeem shares in assets
other than cash for redemption amounts exceeding, in any 90-day period,
$250,000 or 1% of the net asset value of the Fund, whichever is less. When
the NYSE is closed (or when trading is restricted) for any reason other than
its customary weekend or holiday closings, or under any emergency
circumstances as determined by the Securities and Exchange Commission,
redemptions may be suspended or payment dates postponed. Please note that
there are some federal holidays, however, such as Columbus Day and Veterans'
Day, when the NYSE is open and the Fund is open but redemptions cannot be
wired because the banks are closed.

Follow these suggestions to ensure timely processing of your redemption
request:

By Telephone
Institutional Marketing Group 800.317.2274
You may redeem shares from your account by telephone and have your money
electronically transferred or wired to a bank you have previously
authorized. To better enable CAMCO to keep the Fund fully invested, Calvert
requests that you notify the Institutional Marketing Group at least 24 hours
in advance for any redemption over $10 million per day. A charge of $5 may
be imposed on wire transfers of less than $50,000.

Written Requests
Calvert Group, P.O. Box 419544, Kansas City, MO 64141-6544

Your letter should include your account number and fund and the number of
shares or the dollar amount you are redeeming. Please provide a daytime
telephone number, if possible, for us to call if we have questions. If the
money is being sent to a new bank, person, or address other than the address
of record, your letter must be signature guaranteed.

Corporations and Associations
Your letter of instruction and corporate resolution should be signed by
person(s) authorized to act on the account, accompanied by signature
guarantee(s).

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the Fund's
financial performance for the past 5 years. Certain information reflects
financial results for a single share. The total returns in the table
represent the rate that an investor would have earned (or lost) on an
investment in the Fund, assuming reinvestment of all dividends and
distributions. Prior to July 1, 1997, the Fund was not an institutional
fund, but was known as Class MMP. This information has been audited by
PricewaterhouseCoopers, LLP, whose report and the Fund's financial
statements are included in the Fund's annual report, available upon request.

                                      Years Ended
                            December 31,      December 31,
Institutional Class/MMP             1998              1997
Net asset value, beginning         $1.00             $1.00
Income from investment operations
     Net investment income          .035              .031
Distributions from
     Net investment income        (.035)            (.031)
Net asset value, ending            $1.00             $1.00

Total return                       3.58%             3.12%
Ratios to average net assets:
     Net investment income         3.54%             3.37%
     Total expenses +               .30%              .63%
     Net expenses                   .29%              .62%
     Expenses reimbursed              --            (.04%)
Net assets, ending
     (in thousands)             $246,967           $51,087
Number of shares outstanding,
     ending (in thousands)       246,941            51,084


                                    Periods Ended
                            December 31,      December 31,
Institutional Class/MMP             1996             1995^
Net asset value, beginning         $1.00             $1.00
Income from investment operations
     Net investment income          .030              .008
Distributions from
     Net investment income        (.030)            (.008)
Net asset value, ending            $1.00             $1.00

Total return                       2.68%              .79%
Ratios to average net assets:
     Net investment income         2.65%          3.19%(a)
     Total expenses +              1.29%          1.35%(a)
     Net expenses                  1.28%          1.34%(a)
Net assets, ending
     (in thousands)              $33,160           $41,736
Number of shares outstanding,
     ending (in thousands)        33,153            41,732


(a)      Annualized
+        Effective December 31, 1995, this ratio reflects total expenses
before reduction for fees paid indirectly; such reductions are included in
the ratio of net expenses. Total expenses are presented net of expense
waivers and reimbursements.
^        From October 2, 1995 inception.


To Open an Account:
800-317-2274

Service for Existing Accounts:
800-317-2274

TDD for Hearing-Impaired:
800-541  1524

Branch Office:
4550 Montgomery Avenue
Suite 1000N
Bethesda, Maryland 20814

Registered, Certified or
Overnight Mail:
Calvert Group
c/o Institutional Marketing Group
4550 Montgomery Avenue
Suite 1000N
Bethesda, MD 20814
Calvert Group Web-Site
Address: http://www.calvertgroup.com/institutional

PRINCIPAL UNDERWRITER
Calvert Distributors, Inc.
4550 Montgomery Avenue
Suite 1000N
Bethesda, Maryland 20814


For investors who want more information about the Funds, the following
documents are available free upon request:

Annual/Semi-Annual Reports: Additional information about each Fund's
investments is available in the Fund's Annual and Semi-Annual reports to
shareholders. In each Fund's annual report, you will find a discussion of the
market conditions and investment strategies that significantly affected the
Fund's performance during its last fiscal year.

Statement of Additional Information (SAI): The SAI for each Fund provides
more detailed information about the Fund and is incorporated into this
prospectus by reference.

You can get free copies of reports and SAIs, request other information and
discuss your questions about the Funds at:

Calvert Group
Attn: Institutional Marketing Group
4550 Montgomery Ave. Suite 1000N
Bethesda, Md. 20814
Telephone: 1-800-317-2274

Calvert Group Web-Site
Address: http://www.calvertgroup.com

You can review the Funds' reports and SAIs at the public Reference Room of
the Securities and Exchange Commission. You can get text only copies:

o        For a fee, by writing to or calling the Public Reference Room of
the Commission, Washington, D.C. 20549-6009,
         Telephone: 1-800-SEC-0330.

o        Free from the Commission's Internet website at http://www.sec.gov

Investment Company Act file:        no. 81 1-3101 (CTFR)

<PAGE>

PROSPECTUS
April 30, 1999

CALVERT TAX-FREE RESERVES (CTFR)
California Money Market Portfolio


About the Fund
2        Investment Objective, Strategy, Past Performance
5        Fees and Expenses

About Your Investment
6        Management and Advisory Fees
7        How to Buy Shares
7        Important - How Shares are Priced
8        When Your Account Will be Credited
8        Other Calvert Group Features
         (Exchanges, Minimum Account Balance, etc.)
10       Dividends, Capital Gains and Taxes
12       How to Sell Shares
14       Financial Highlights
15       Service Fees and Arrangements
         with Dealers


These securities have not been approved or disapproved by the Securities and
Exchange Commission ("SEC") or any state securities commission nor has the
SEC or any state securities commission passed upon the accuracy or adequacy
of this prospectus. Any representation to the contrary is a criminal offense.


<PAGE>

INVESTMENT OBJECTIVE, STRATEGY AND PAST PERFORMANCE

Objective
CTFR California Money Market (the "Fund") seeks to earn the highest level of
interest income, exempt from federal and California state income taxes, as
is consistent with prudent investment management, preservation of capital,
and the quality and maturity characteristics of the Fund.

Principal Investment Strategies and Related Risks
CTFR California Money Market invests in fixed and floating rate municipal
bonds and notes, variable rate demand notes, tax exempt commercial paper,
and other high quality, short term municipal obligations. The Advisor looks
for securities with strong credit quality that are attractively priced. This
may include investments with unusual features or privately placed issues,
that are not widely followed in the fixed income marketplace. All
investments must comply with the SEC money market fund requirements.

Under normal market conditions, the Fund will invest at least 80% of its
total assets in municipal obligations whose interest is exempt from federal
and California state income tax. The Fund will also attempt to invest the
remaining 20% of its total assets in such obligations, but may invest it in
municipal obligations of other states, territories and possessions of the
United States, the District of Columbia and their respective authorities,
agencies, instrumentalities and political subdivisions or in short term
taxable money market type instruments. Dividends paid by the Fund which are
derived from interest attributable to California municipal obligations will
be exempt from federal and California state personal income taxes. Dividends
derived from interest on tax exempt obligations of other governmental
issuers will be exempt from federal income tax, but will be subject to
California state income taxes.

Because the Fund invests primarily in California municipal obligations, the
economy and political climate in that state have a great impact on the Fund.
The Fund may invest up to 25% of its assets in a single issuer.

Many of the instruments held by the Fund are supported by letters of credit
issued by banks; thus, the Fund has a wide exposure to the banking industry.

The Fund may purchase securities that have not been rated by a rating
agency, so long as the Advisor determines they are of comparable credit
quality.

Unrated and privately placed securities may be less liquid than those that
are rated or have an active trading market.

The Fund's yield will change in response to market interest rates. In
general, as market rates go up so will the Fund's yield, and vice versa.
Although the Fund tries to keep the value of its shares constant at $1.00
per share, extreme changes in market rates, and or sudden credit
deterioration of a holding could cause the value to decrease. The Fund
limits the amount it invests in any one issuer to try to lessen its exposure.

An investment in the Fund is not a bank deposit and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other
government agency. Although the Fund seeks to preserve the value of your
investment at $1.00 per share, it is possible to lose money by investing in
the Fund.

<PAGE>

CTFR California Money Market Performance
The bar chart and table below show the Fund's annual returns and its long
term performance. The chart and table provide some indication of the risks
of investing in the Fund. The chart shows how the performance has varied
from year to year. The table compares the Fund's returns over time to the
Lipper California Tax Exempt Money Market Funds Index, a composite index of
the annual return of mutual funds that have an investment goal similar to
that of the Fund. The Fund's past performance does not necessarily indicate
how the Fund will perform in the future.

CTFR California Money Market
Year-by-Year Total Return

[BAR CHART]
1990              6.04%
1991              4.64%
1992              3.07%
1993              2.26%
1994              2.62%
1995              3.78%
1996              3.17%
1997              3.28%
1998              3.19%

Best Quarter (of periods shown)     Q2 '90  1.52%
Worst Quarter (of periods shown)    Q1 '93  0.53%

Average Annual Total Returns (as of 12.31.98)
                                    1 year       5 years      Since
                                                              Inception*
CTFR California Money Market        3.19%        3.21%        3.61%
Lipper California Tax Exempt
     Money Market Funds Index       2.77%        3.00%        3.25%

*The month end date of 10/31/89 is used for comparison purposes only; actual
fund inception is 10/16/89

For current yield information call 800-368-2745, or visit Calvert Group's web
site at www.calvertgroup.com

<PAGE>

FEES AND EXPENSES

This table describes the fees and expenses that you may pay if you buy and
hold shares of the Fund. Shareholder fees are paid directly from your
account; annual Fund operating expenses are deducted from Fund assets.

     Maximum sales charge (load)                     None
     Maximum deferred sales charge (load)            None
     Maximum Account Fee                             1

Annual Fund Operating Expenses

     Management fees                                 .51%
     Distribution and service (12b-1) fees           None
     Other expenses2                                 .18%
     Total annual fund operating expenses            .69%

Expenses are based on expenses for the Fund's most recent fiscal year,
unless otherwise indicated. Management fees include the administrative fee
paid by the Fund to Calvert Administrative Services Company, an affiliate of
the Advisor, Calvert Asset Management Company, Inc. ("CAMCO").

1 For each account with a balance of less than $1000, the Fund charges a
monthly account maintenance fee of $3.00.
2 Expenses have been restated to reflect expenses expected to be incurred in
1999.

Example
This example is intended to help you compare the cost of investing in a Fund
with the cost of investing in other mutual funds. The example assumes that:
        You invest $10,000 in the Fund for the time periods indicated;
        Your investment has a 5% return each year; and
        The Fund's operating expenses remain the same.

Although your actual costs may be higher or lower, under these assumptions
your costs would be:
                      1 Year        3 Years      5 Years      10 Years
CTFR California
Money Market          $70           $221         $384         $859

Management and Advisory Fees

About Calvert Group
CAMCO (4550 Montgomery Avenue, Suite 1000N, Bethesda, MD 20814) is the
Funds' investment advisor and provides day to day investment management
services to the Funds. It has been managing mutual funds since 1976. CAMCO
is the investment advisor for over 25 mutual funds, including the first and
largest family of socially screened funds. As of December 31, 1998, CAMCO
had $6 billion in assets under management.

Advisory Fees
The following table shows the aggregate annual advisory fee paid to CAMCO by
the Fund for the most recent fiscal year as a percentage of the Fund's
average daily net assets.

Fund                                        Advisory Fee
CTFR California Money Market                .50%

A Word About the Year 2000 (Y2K) and Our Computer Systems
Like other mutual funds, CAMCO and its service providers use computer
systems for all aspects of our business - processing shareholder and fund
transactions, fund accounting, executing trades, and pricing securities,
just to name a few. Many current software programs cannot distinguish
between the year 2000 and the year 1900. This can cause problems with
retirement plan distributions, dividend payment software, transaction
software, and numerous other areas that could impact the Funds. Calvert
Group has been reviewing all of its computer systems for Y2K compliance.
Although, at this time, there can be no assurance that there will be no
negative impact on the Funds, the Advisor, the underwriter, transfer agent
and custodian have advised the Funds that they have been actively working on
any necessary changes to their computer systems to prepare for Y2K and
expect that their systems, and those of their outside service providers,
will be adapted in time for that event. For more information, please visit
our web site at www.calvertgroup.com

How to Buy Shares
Complete and sign an application for each new account. For more information,
contact your broker or our shareholder services department at 800 368 2748.

Minimum To Open an Account              Minimum additional investments
     $2,000                             $250

Please make your check payable
to the Fund and mail it to:
     New Accounts                       Subsequent Investments
     (include application)              (include investment slip)
     Calvert Group                      Calvert Group
     P.O. Box 419544                    P.O. Box 419739
     Kansas City, MO                    Kansas City, MO
     64141-6544                         64141-6739

By Registered,             Calvert Group
Certified, or              c/o NFDS,
Overnight Mail             330 West 9th St.
                           Kansas City, MO 64105-1807

At the Calvert Office: Visit the Calvert Office to make investments by check.

IMPORTANT - HOW SHARES ARE PRICED
The price of shares is based on the Fund's net asset value ("NAV"). NAV is
computed by adding the value of the Fund's holdings plus other assets,
subtracting liabilities, and then dividing the result by the number of
shares outstanding.

CTFR California Money Market is valued according to the "amortized cost"
method, which is intended to stabilize the NAV at $1 per share.

The NAV is calculated as of the close of each business day, which coincides
with the closing of the regular session of the New York Stock Exchange
("NYSE") (normally 4 p.m. ET). The Fund is open for business each day the
NYSE is open. Please note that there are some federal holidays, however,
such as Columbus Day and Veterans' Day, when the NYSE is open and the Fund
is open but purchases cannot be received because the banks are closed.

WHEN YOUR ACCOUNT WILL BE CREDITED
All of your purchases must be made in US dollars. No cash will be accepted.
No credit card or credit loan checks will be accepted. The Fund reserves the
right to suspend the offering of shares for a period of time or to reject
any specific purchase order. As a convenience, check purchases received at
Calvert's office in Bethesda, Maryland will be sent by overnight delivery to
the Transfer Agent and will be credited the next business day upon receipt.
Any check purchase received without an investment slip may cause delayed
crediting. If your check does not clear your bank, your purchase will be
canceled and you will be charged a $25 fee plus any costs incurred.

Your purchase will be credited at the net asset value next calculated after
your order is received and accepted. If the Transfer Agent receives your
wire purchase by 5 p.m. ET, your account will begin earning dividends on the
next business day. Exchanges begin earning dividends the next business day
after the exchange request is received by mail or telephone. Purchases
received by check will begin earning dividends the next business day after
they are credited to the account.

OTHER CALVERT GROUP FEATURES

Calvert Information Network
For 24 hour performance and account information call 800 368 2745 or visit
http://www.calvertgroup.com
You can obtain current performance and pricing information, verify account
balances, and authorize certain transactions with the convenience of one
phone call, 24 hours a day.

Account Services
By signing up for services when you open your account, you avoid having to
obtain a signature guarantee. If you wish to add services at a later date, a
signature guarantee to verify your signature may be obtained from any bank,
trust company and savings and loan association, credit union, broker dealer
firm or member of a domestic stock exchange. A notary public cannot provide
a signature guarantee.

Calvert Money Controller
Calvert Money Controller allows you to purchase or sell shares by electronic
funds transfer without the time delay of mailing a check or the added
expense of a wire. Use this service to transfer up to $300,000
electronically. Allow one or two business days after you place your request
for the transfer to take place. Money transferred to purchase new shares
will be subject to a hold of up to 10 business days before redemption
requests will be honored. Transaction requests must be received by 4 p.m.
ET. You may request this service on your initial account application.
Calvert Money Controller transactions returned for insufficient funds will
incur a $25 charge.

Telephone Transactions
You may purchase, redeem, or exchange shares, wire funds and use Calvert
Money Controller by telephone if you have pre authorized service
instructions. You receive telephone privileges automatically when you open
your account unless you elect otherwise. For our mutual protection, the
Fund, the shareholder servicing agent and their affiliates use precautions
such as verifying shareholder identity and recording telephone calls to
confirm instructions given by phone. A confirmation statement is sent for
most transactions; please review this statement and verify the accuracy of
your transaction immediately.

Exchanges
Calvert Group offers a wide variety of investment options that includes
common stock funds, tax exempt and corporate bond funds, and money market
funds (call your broker or Calvert representative for more information). We
make it easy for you to purchase shares in other Calvert funds if your
investment goals change. The exchange privilege offers flexibility by
allowing you to exchange shares on which you have already paid a sales
charge from one mutual fund to another at no additional charge.

Complete and sign an account application, taking care to register your new
account in the same name and taxpayer identification number as your existing
Calvert account(s). Exchange instructions may then be given by telephone if
telephone redemptions have been authorized and the shares are not in
certificate form.

Before you make an exchange, please note the following:
Each exchange represents the sale of shares of one Fund and the purchase of
shares of another. Therefore, you could realize a taxable gain or loss.

You may exchange shares acquired by reinvestment of dividends or
distributions into another Calvert Fund at no additional charge.

Shares may only be exchanged for shares of the same class of another Calvert
Fund.

The Fund reserves the right to terminate or modify the exchange privilege
with 60 days' written notice.

Combined General Mailings (Householding)
Multiple accounts with the same social security number will receive one
mailing per household of information such as prospectuses and semi annual
and annual reports. You may request further grouping of accounts to receive
fewer mailings.

Separate statements will be generated for each separate account and will be
mailed in one envelope for each combination above.

Special Services and Charges
The Fund pays for shareholder services but not for special services that are
required by a few shareholders, such as a request for a historical
transcript of an account or a stop payment on a draft. You may be required
to pay a fee for these special services; for example, the fee for stop
payments is $25.

If you are purchasing shares through a program of services offered by a
broker/dealer or financial institution, you should read the program
materials together with this Prospectus. Certain features may be modified in
these programs. Investors may be charged a fee if they effect transactions
in Fund shares through a broker or agent.

Minimum Account Balance
Please maintain a balance in your account of at least $1,000. If the balance
in your account falls below the minimum during a month, a $3.00 monthly fee
may be charged to your account.

DIVIDENDS, CAPITAL GAINS AND TAXES
The Fund pays dividends from its net investment income as shown below. Net
investment income consists of interest income, net short term capital gains,
if any, and dividends declared and paid on investments, less expenses.
Distributions of net short term capital gains (treated as dividends for tax
purposes) and net long term capital gains, if any, are normally paid once a
year; however, the Fund does not anticipate making any such distributions
unless available capital loss carryovers have been used or have expired.
Dividends in CTFR California Money Market are accrued daily and paid monthly.

Dividend Payment Options
Dividends and any distributions are automatically reinvested in the same
Fund at NAV (without sales charge), unless you elect to have amounts of $10
or more paid in cash (by check or by Calvert Money Controller). Dividends
and distributions from any Calvert Group Fund may be automatically invested
in an identically registered account in any other Calvert Group Fund at NAV.
If reinvested in the same account, new shares will be purchased at NAV on
the reinvestment date, which is generally 1 to 3 days prior to the payment
date. You must notify the Fund in writing to change your payment options. If
you elect to have dividends and/or distributions paid in cash, and the US
Postal Service returns the check as undeliverable, it, as well as future
dividends and distributions, will be reinvested in additional shares.

Federal Taxes
Dividends derived from interest on municipal obligations constitute exempt
interest dividends, on which you are not subject to federal income tax.
However, dividends which are from taxable interest and any distributions of
short term capital gain are taxable to you as ordinary income. If the Fund
makes any distributions of long term capital gains, then these are taxable
to you as long term capital gains, regardless of how long you held your
shares of the Fund. Dividends attributable to interest on certain private
activity bonds must be included in federal alternative minimum tax for
individuals and for corporations. The Fund may invest in and derive up to
20% of its income from taxable short term money market investments, for
liquidity purposes or pending investment. Interest earned from taxable
investments will be taxable as ordinary income.

If any taxable income or gains are paid, in January, the Fund will mail you
Form 1099-DIV indicating the federal tax status of dividends and any capital
gain distributions paid to you during the past year. Generally, dividends
and distributions are taxable in the year they are paid. However, any
dividends and distributions paid in January but declared during the prior
three months are taxable in the year declared. Dividends and distributions
are taxable to you regardless of whether they are taken in cash or
reinvested.

Other Tax Information
To the extent that exempt interest dividends are derived from earnings
attributable to California Municipal Obligations, they will also be exempt
from state and local personal income tax in California. The dividends may be
subject to California franchise taxes and corporate income taxes if received
by a corporation subject to such taxes. A letter will be mailed to you in
January detailing the percentage invested in California during the previous
tax year.

Taxpayer Identification Number
If we do not have your correct Social Security or Taxpayer Identification
Number ("TIN") and a signed certified application or Form W-9, Federal law
requires us to withhold 31% of your reportable dividends, and possibly 31%
of certain redemptions. In addition, you may be subject to a fine by the
Internal Revenue Service. You will also be prohibited from opening another
account by exchange. If this TIN information is not received within 60 days
after your account is established, your account may be redeemed (closed) at
the current NAV on the date of redemption. Calvert Group reserves the right
to reject any new account or any purchase order for failure to supply a
certified TIN.

HOW TO SELL SHARES

You may redeem all or a portion of your shares on any day the Fund is open
for business, provided the amount requested is not on hold. When you
purchase by check or with Calvert Money Controller (electronic funds
transfer), the purchase will be on hold for up to 10 business days from the
date of receipt. During the hold period, redemptions proceeds will not be
sent until the Transfer Agent is reasonably satisfied that the purchase
payment has been collected. Drafts written during the hold period will be
returned for uncollected funds.

Your shares will be redeemed at the next NAV calculated after your
redemption request is received. The proceeds will normally be sent to you on
the next business day, but if making immediate payment could adversely
affect your Fund, it may take up to seven (7) days to make payment. Calvert
Money Controller redemptions generally will be credited to your bank account
by the second business day after your phone call. The Funds have the right
to redeem shares in assets other than cash for redemption amounts exceeding,
in any 90 day period, $250,000 or 1% of the net asset value of the affected
Fund, whichever is less. When the NYSE is closed (or when trading is
restricted) for any reason other than its customary weekend or holiday
closings, or under any emergency circumstances as determined by the
Securities and Exchange Commission, redemptions may be suspended or payment
dates postponed. Please note that there are some federal holidays, however,
such as Columbus Day and Veterans' Day, when the NYSE is open and the Fund
is open but redemptions cannot be mailed or wired because the post offices
and banks are closed.

Follow these suggestions to ensure timely processing of your redemption
request:

By Telephone
You may redeem shares from your account by telephone and have your money
mailed to your address of record or electronically transferred or wired to a
bank you have previously authorized. A charge of $5 may be imposed on wire
transfers of less than $1,000.

Written Requests
Calvert Group, P.O. Box 419544, Kansas City, MO 64141 6544
Your letter should include your account number and fund and the number of
shares or the dollar amount you are redeeming. Please provide a daytime
telephone number, if possible, for us to call if we have questions. If the
money is being sent to a new bank, person, or address other than the address
of record, your letter must be signature guaranteed.

Draftwriting
You may redeem shares in your account by writing a draft for at least $250.
If you complete and return the signature card for Draftwriting, the Fund
will mail bank drafts to you, printed with your name and address. Drafts may
not be ordered until your initial purchase has cleared. Calvert will provide
printed drafts (checks). You may not print your own. Any customer-printed
checks will not be honored and will be returned without notice. The Fund
will charge a service fee for drafts returned for insufficient funds. The
Fund will charge $25 for any stop payment on drafts or for drafts returned
for any reason. As a service to shareholders, shares may be automatically
transferred between your Calvert accounts to cover drafts you have written.
The signature of only one authorized signer is required to honor a draft.

Systematic Check Redemptions
If you maintain an account with a balance of $10,000 or more, you may have
up to two (2) redemption checks for a fixed amount sent to you on the 15th
of the month, simply by sending a letter with all information, including
your account number, and the dollar amount ($100 minimum). If you would like
a regular check mailed to another person or place, your letter must be
signature guaranteed.

Corporations and Associations
Your letter of instruction and corporate resolution should be signed by
person(s) authorized to act on the account, accompanied by signature
guarantee(s).

Trusts
Your letter of instruction should be signed by the Trustee(s) (as
Trustee(s)), with a signature guarantee. (If the Trustee's name is not
registered on your account, please provide a copy of the trust document,
certified within the last 60 days.)

Through your Dealer
Your dealer must receive your request before the close of regular trading on
the NYSE to receive that day's NAV. Your dealer will be responsible for
furnishing all necessary documentation to Calvert Group and may charge you
for services provided.

<PAGE>

FINANCIAL HIGHLIGHTS
The financial highlights table is intended to help you understand the Fund's
financial performance for the past 5 years (or if shorter, the period of the
Fund's operations). Certain information reflects financial results for a
single share. The total returns in the table represent the rate that an
investor would have earned (or lost) on an investment in a Fund (assuming
reinvestment of all dividends and distributions). This information has been
audited by PricewaterhouseCoopers LLP whose report, along with a Fund's
financial statements, are included in the Fund's annual report, which is
available upon request.

                                             Years Ended
                            December 31,      December 31,     December 31,
                                    1998              1997             1996
Net asset value, beginning         $1.00             $1.00            $1.00
Income from investment operations
     Net investment income          .031              .032             .031
Distributions from
     Net investment income        (.031)            (.032)           (.031)
Net asset value, ending            $1.00             $1.00            $1.00

Total return                       3.19%             3.28%            3.17%
Ratios to average net assets:
     Net investment income         3.13%             3.22%            3.14%
     Total expenses +               .67%              .66%             .69%
     Net expenses                   .65%              .65%             .68%
     Expenses reimbursed            .02%              .05%             .03%
Net assets, ending
     (in thousands)             $437,575          $321,001         $346,008
Number of shares outstanding,
     ending (in thousands)       437,673           321,126          346,124

                                                     Years Ended
                                              December 31,     December 31,
                                                      1995             1994
Net asset value, beginning                           $1.00            $1.00
Income from investment operations
     Net investment income                            .037             .026
Distributions from
     Net investment income                          (.037)           (.026)
Net asset value, ending                              $1.00            $1.00
Total return                                        3.78%*          2.62% *
Ratios to average net assets:
     Net investment income                           3.69%            2.55%
     Total expenses +                                 .76%               -
     Net expenses                                     .75%             .69%
Net assets, ending (in thousands)                 $300,351         $260,719
Number of shares outstanding,
     ending (in thousands)                         300,544          260,716

*        Total return numbers do not reflect the Tender Option Agreement. On
December 15, 1994, the Portfolio entered into a Tendered Option Agreement
with the Advisor valued at $600,000 to secure payment of an "at risk"
investment. On June 30, 1995, the investment paid the Portfolio in full and
the Option expired unused. The expiration loss was applied against the
Advisor's capital contribution of the Option.
+        Effective December 31, 1995, this ratio reflects total expenses
before reduction of fees paid indirectly; such reductions are included in
the ratio of net expenses. Total expenses are presented net of expense
waivers and reimbursements.

<PAGE>

SERVICE FEES AND ARRANGEMENTS WITH DEALERS
Calvert Distributors, Inc., the Fund's underwriter, pays dealers an ongoing
service fee of up to 0.20% while you own shares of a Fund (expressed as an
annual percentage rate of average daily net assets held in Calvert accounts
by that dealer).


To Open an Account:
800-368-2748

Performance and Prices:
Calvert Information Network
24 hours, 7 days a week
800-368-2745

Service for Existing Accounts:
Shareholders 800-368-2745
Brokers 800-368-2746

TDD for Hearing Impaired:
800-541-1524

Calvert Office:
4550 Montgomery Avenue
Suite 1000N
Bethesda, Maryland 20814
Registered, Certified or
Overnight Mail:
Calvert Group
c/o NFDS
330 West 9th Street
Kansas City, MO 64105

Calvert Group Web Site
Address: http://www.calvertgroup.com

PRINCIPAL UNDERWRITER
Calvert Distributors, Inc.
4550 Montgomery Avenue
Suite 1000N
Bethesda, Maryland 20814

<PAGE>

For investors who want more information about the Funds, the following
documents are available free upon request:

Annual/Semi Annual Reports: Additional information about the Fund's
investments is available in the Fund's Annual and Semi Annual reports to
shareholders. In the Fund's annual report, you will find a discussion of the
market conditions and investment strategies that significantly affected the
Fund's performance during its last fiscal year.

Statement of Additional Information (SAI): The SAI for the Fund provides
more detailed information about the Fund and is incorporated into this
prospectus by reference.

You can get free copies of reports and SAIs, request other information and
discuss your questions about the Funds by contacting your broker, or the
Funds at:

Calvert Group
4550 Montgomery Ave, Suite 1000N
Bethesda, Md. 20814

Telephone: 800-368-2745

Calvert Group Web Site
Address: http://www.calvertgroup.com

You can review the Funds' reports and SAIs at the public Reference Room of
the Securities and Exchange Commission. You can get text only copies:

o    For a fee, by writing to or calling the Public Reference Room of the
Commission, Washington, D.C. 20549 6009, Telephone: 800-SEC-0330.

o    Free from the Commission's Internet web site at http://www.sec.gov.

Investment Company Act file:        no. 811-3101 (CTFR)

<PAGE>
PROSPECTUS
April 30, 1999

CALVERT TAX-FREE RESERVES FUND
Vermont Municipal Portfolio



About the Fund
2        Investment objective, strategy, past performance
5        Fees and Expenses
6        Principal Investment Practices and Risks

About Your Investment
10       Calvert Group and the Portfolio Management Team
10       Advisory Fees
11       How to Buy Shares (Sales charges, etc.)
13       Important - How Shares are Priced
14       Other Calvert Group Features
                  (Exchanges, Minimum Account Balance, etc.)
16       Dividends, Capital Gains and Taxes
18       How to Sell Shares
20       Financial Highlights
21       Exhibit A- Reduced Sales Charges
22       Exhibit B- Service Fees and
         Arrangements with Dealers









These securities have not been approved or disapproved by the Securities and
Exchange Commission ("SEC") or any state securities commission nor has the
SEC or any state securities commission passed upon the accuracy or adequacy
of this prospectus. Any representation to the contrary is a criminal offense.

<PAGE>

Objective
CTFR Vermont Municipal (the "Fund") seeks to earn the highest level of
interest income exempt from federal and Vermont state income taxes as is
consistent with prudent investment management, preservation of capital, and
the quality and maturity characteristics of the Fund.

Principal Investment Strategies
The Fund typically invests at least 65% of its net assets in investment
grade debt securities. The Advisor looks for securities with strong credit
quality within their rating category that are attractively priced. This may
include investments with unusual features or privately placed issues, that
are not widely followed in the fixed income marketplace. To the extent it
may do so consistent with its investment objective, the Fund follows a
strategy to also seek to provide a competitive rate of total return. There
is no limit on the Fund's average portfolio maturity or duration (another
measure of the Fund's interest rate sensitivity), although the average
portfolio duration is expected to be between four and nine years.

The Fund may invest in a variety of tax-exempt obligations including
tax-supported debt (general obligation bonds of state and local issuers),
various types of revenue debt (transportation, housing, utilities,
hospital), special tax obligations, and qualified private activity bonds and
other state and local government authorities, municipal leases, and
certificates of participation in such investments. The obligations may be
structured as variable rate or adjustable rate obligations and are often
supported by a third party letter of credit.

Under normal market conditions, the Fund will invest at least 65% of its
total assets in municipal obligations whose interest is exempt from federal
and Vermont state income tax. The Fund will also attempt to invest the
remaining 35% of its total assets in such obligations, but may invest it in
municipal obligations of other states, territories and possessions of the
United States, the District of Columbia and their respective authorities,
agencies, instrumentalities and political subdivisions or in short-term
taxable money market-type instruments. Dividends paid by the Fund which are
derived from interest attributable to Vermont municipal obligations will be
exempt from federal and Vermont state personal income taxes. Dividends
derived from interest on tax-exempt obligations of other governmental
issuers will be exempt from federal income tax, but will be subject to
Vermont state income taxes.

Because the Fund invests primarily in Vermont municipal obligations, the
economy and political climate in that state have a great impact on the Fund.



The Fund may purchase unrated securities, so long as the Advisor determines
they are of comparable credit quality. Unrated securities may be less liquid
than those that are rated.

Principal Risks
You could lose money on your investment in the Fund, or the Fund could
underperform, most likely for any of the following reasons:

o        The bond market goes down
o        The individual bonds in the Fund do not perform as well as expected
o        The Advisor's forecast as to interest rates is not correct
o        The Advisor's allocation among different sectors of the bond market
does not perform as well as expected
o        The Fund is non-diversified. Compared to other funds, the Fund may
invest more of its assets in a smaller number of bonds. Gains or losses on a
single bond may have greater impact on the Fund.

An investment in the Fund is not a bank deposit and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other
government agency.

CTFR Vermont Municipal Performance
The bar chart and table below show the Fund's annual returns and its
long-term performance. The chart and table provide some indication of the
risks of investing in the Fund. The chart shows how the performance of the
shares has varied from year to year. The table compares the Fund's
performance over time to that of the Lehman Municipal Bond Index . This is a
widely recognized, unmanaged index of bond prices. It also shows the Fund's
returns compared to the Lipper Other States Municipal Debt Funds Average, a
composite average of the annual return of mutual funds that have an
investment goal similar to that of the Fund. The Fund's past performance
does not necessarily indicate how the Fund will perform in the future.

The bar chart does not reflect any sales charge that you may be required to
pay upon purchase or redemption of the Fund's shares. Any sales charge will
reduce your return. The average total return table shows returns with the
maximum sales charge deducted. No sales charge has been applied to the index
and average used for comparison in the table.


CTFR Vermont Municipal
Year-by-Year Total Return (at NAV)

[BAR CHART]

1992              7.62%
1993              10.85%
1994              -2.87%
1995              14.87%
1996              3.98%
1997              6.90%
1998              5.67%

Best Quarter (of periods shown)     Q1 '95  4.90%
Worst Quarter (of periods shown)    Q1 '94  -3.55%


Average Annual Total Returns (as of 12.31.98)
(with maximum sales charge deducted)

                                      1 year       5 years      Since
                                                                Inception*
CTFR Vermont                          1.71%        4.66%        6.36%
Lehman Municipal Bond Index TR        5.84%        6.10%        8.50%
Lipper Other States Municipal
Debt Funds Average                    5.18%        5.19%        6.73%

*The month end date of 4/30/91 is used for comparison purposes only, actual
fund inception is 4/1/91

FEES AND EXPENSES

This table describes the fees and expenses that you may pay if you buy and
hold shares of a Fund. Shareholder fees are paid directly from your account;
annual Fund operating expenses are deducted from Fund assets.

     Maximum sales charge (load)                     3.75%
         (as a percentage of offering price)
     Maximum deferred sales charge (load)            None1
         (as a percentage of purchase or
         redemption proceeds, whichever is lower)

Annual Fund Operating Expenses
 
     Management fees                                 .61%
     Distribution and service (12b-1) fees           None
     Other expenses2                                 .16%
     Total annual fund operating expenses            .77%

1 Purchases of shares for accounts with $1 million or more are not subject
to front-end sales charges, but may be subject to a 1.0% contingent deferred
sales charge on shares redeemed within 1 year of purchase. (See "How to Buy
Shares)
2 Expenses have been restated to reflect expenses expected to be incurred in
1999.

Annual Fund Operating Expenses
Expenses are based on expenses for the Fund's most recent fiscal year,
unless otherwise indicated. Management fees include the administrative fee
paid by the Fund to Calvert Administrative Services Company, an affiliate of
the Advisor, Calvert Asset Management Company, Inc. ("CAMCO").

Example
This example is intended to help you compare the cost of investing in a Fund
with the cost of investing in other mutual funds. The example assumes that:
You invest $10,000 in the Fund for the time periods indicated;
Your investment has a 5% return each year; and
The Fund's operating expenses remain the same.

Although your actual costs may be higher or lower, under these assumptions
your costs would be:

                      1 Year        3 Years      5 Years      10 Years
CTFR Vermont
Municipal             $451          $612         $787         $1,293


Principal Investment Practices and Risks
The most concise description of the principal investment strategies and
associated risks is under the earlier summary. The Fund is also permitted to
invest in certain other investments and to use certain investment techniques
that have higher risks associated with them. On the following pages are
brief descriptions of the investments and techniques, summarized earlier
along with certain additional investment techniques and their risks.

For each of the investment practices listed, the table below shows the
Fund's limitations as a percentage of its assets and the principal types of
risk involved. (See the pages following the table for a description of the
types of risks). Numbers in this table show maximum allowable amount only;
for actual usage, consult the annual/semi-annual reports.

Key to Table
@        Fund currently uses
0        Permitted, but not typically used
(% of assets allowable, if restricted)
- --       Not permitted
xN       Allowed up to x% of fund's net assets
xT       Allowed up to x% of Fund's total assets
NA       Not applicable to this type of fund

Investment Practices
- ------------------------------------------ --------
Temporary Defensive Positions.             0
During adverse market, economic or
political conditions, the Fund may
depart from its principal investment
strategies by increasing its investment
in U.S. government securities and other
short-term interest-bearing securities.
During times of any temporary defensive
positions, a Fund may not be able to
achieve its investment objective Risks:
Opportunity.
- ------------------------------------------ --------

Conventional Securities:
- ------------------------------------------ --------
Investment grade bonds. Bonds rated        @
BBB/Baa or higher or comparable unrated
bonds. Risks: Interest Rate, Market ,
Credit and Information.
- ------------------------------------------ --------

<PAGE>

- ------------------------------------------ --------
Below-investment grade bonds. Bonds        @
rated below BBB/Baa or comparable          35N
unrated bonds, also known as high-yield
bonds. They are subject to greater
credit risk than investment grade bonds.
Risks: Credit, Market, Interest Rate,
Liquidity and Information.
- ------------------------------------------ --------

- ------------------------------------------ --------
Unrated debt securities. Bonds that have   @
not been rated by a recognized rating
agency; the Advisor has determined the
credit quality based on its own
research. Risks: Credit, Market,
Interest Rate, Liquidity and
Information.
- ------------------------------------------ --------

- ------------------------------------------ --------
Illiquid securities. Securities which      15N
cannot be readily sold because there is
no active market. Risks: Liquidity,
Market and Transaction.
- ------------------------------------------ --------

Unleveraged derivative securities

- ------------------------------------------ --------
Asset-backed securities. Securities are    @
issued by a special purpose entity and
are backed by fixed-income or other
interest bearing assets. Risks: Credit,
Interest Rate and Liquidity.
- ------------------------------------------ --------

- ------------------------------------------ --------
Mortgage-backed securities (typically,
single-family mortgage bonds).             @
Securities are backed by pools of
mortgages, including passthrough
certificates. Risks: Credit, Extension,
Prepayment, Liquidity and Interest Rate.
- ------------------------------------------ --------

Leveraged derivative instruments

- ------------------------------------------ --------
Options on securities and indices.         5N
Contracts giving the holder the right
but not the obligation to purchase or
sell a security (or the cash value, in
the case of an option on an index) at a
specified price within a specified time.
Any options written by the Fund must be
"covered". The limitation is based on
net premium payments. Risks: Interest
Rate, Market, Leverage, Correlation,
Liquidity, Credit and Opportunity.
- ------------------------------------------ --------

<PAGE>

- ------------------------------------------ --------
Futures contract. Agreement to buy or      5N
sell a specific amount of a commodity or
financial instrument at a particular
price on a specific future date. Risks:
Interest Rate, Market, Leverage,
Correlation, Liquidity and Opportunity.
- ------------------------------------------ --------

- ------------------------------------------ --------
Structured securities. Inverse floating    @
rate municipal notes and bonds. These
securities tend to be highly sensitive
to interest rate movements. Risks:
Credit, Interest Rate, Market, Leverage,
Liquidity and Correlation.
- ------------------------------------------ --------

The Fund has additional investment policies and restrictions that are not
principal to its investment strategies (for example, repurchase agreements,
reverse repurchase agreements, borrowing, pledging, and securities lending,
and when-issued securities.) These policies and restrictions are discussed
in the SAI.

Types of Investment Risk
Correlation risk
This occurs when a Fund "hedges"- uses one investment to offset the Fund's
position in another. If the two investments do not behave in relation to one
another the way Fund managers expect them to, then unexpected or undesired
results may occur. For example, a hedge may eliminate or reduce gains as
well as offset losses.

Credit risk
The risk that the issuer of a security or the counterparty to an investment
contract may default or become unable to pay its obligations when due.

Extension risk
The risk that an unexpected rise in interest rates will extend the life of a
mortgage-backed security beyond the expected prepayment time, typically
reducing the security's value.

Information risk
The risk that information about a security or issuer or the market might not
be available, complete, accurate or comparable.

Interest rate risk
The risk that changes in interest rates will adversely affect the value of
an investor's securities. When interest rates rise, the value of
fixed-income securities will generally fall. Conversely, a drop in interest
rates will generally cause an increase in the value of fixed-income
securities. Longer-term securities and zero coupon/"stripped" coupon
securities ("strips") are subject to greater interest rate risk.

<PAGE>

Leverage risk
The risk that occurs in some securities or techniques which tend to magnify
the effect of small changes in an index or a market. This can result in a
loss that exceeds the amount actually invested.

Liquidity risk
The risk that occurs when investments cannot be readily sold. A Fund may
have to accept a less-than-desirable price to complete the sale of an
illiquid security or may not be able to sell it at all.

Management risk
The risk that a Fund's portfolio management practices might not work to
achieve their desired result.

Market risk
The risk that securities prices in a market, a sector or an industry will
fluctuate, and that such movements might reduce an investment's value.

Opportunity risk
The risk of missing out on an investment opportunity because the assets
needed to take advantage of it are committed to less advantageous
investments or strategies.

Political risk
The risk that may occur with foreign investments, and means that the value
of an investment may be adversely affected by nationalization, taxation,
war, government instability or other economic or political actions or
factors.

Prepayment risk
The risk that unanticipated prepayments may occur, reducing the value of a
mortgage-backed security. The Fund must then reinvest those assets at the
current, market rate which may be lower.

Transaction risk
The risk that a Fund may be delayed or unable to settle a transaction or
that commissions and settlement expenses may be higher than usual.


About Calvert Group
CAMCO (4550 Montgomery Avenue, Suite 1000N, Bethesda, MD 20814) is the
Fund's investment advisor and provides day-to-day investment management
services to the Fund. It has been managing mutual funds since 1976. CAMCO is
the investment advisor for over 25 mutual funds. As of December 31, 1998,
CAMCO had $6 billion in assets under management.

CAMCO uses a team approach to its management of the Fund. Since inception,
investment selections for the Fund have been made by David R. Rochat and
Reno J. Martini. Mr. Rochat is a Director and Senior Vice President of
Calvert Asset Management Company, Inc. He is a Trustee/Director and Senior
Vice President of First Variable Rate Fund, Calvert Tax-Free Reserves, Money
Management Plus, The Calvert Fund, and Calvert Municipal Fund, Inc., and is
primarily responsible for setting the investment strategy of the trading
department, utilizing over 20 years' experience in the securities and
investment community. Mr. Rochat joined Calvert Group in 1981 after
establishing and managing the municipal bond department at Donaldson,
Lufkin, & Jenrette Securities Corporation. Reno J. Martini, Senior Vice
President and Chief Investment Officer of CAMCO, oversees the management of
all Calvert Funds for CAMCO. Mr. Martini has over 18 years of experience in
evaluating and purchasing municipal securities and has been the head of
CAMCO's asset management team since 1985.

Advisory Fees
The following table shows the aggregate annual advisory fee paid to CAMCO by
the Fund for the most recent fiscal year as a percentage of average daily
net assets.

     Fund                 Advisory Fee
     CTFR Vermont         .60%

A Word About the Year 2000 (Y2K) and Our Computer Systems
Like other mutual funds, CAMCO and its service providers use computer
systems for all aspects of our business -- processing shareholder and fund
transactions, fund accounting, executing trades, and pricing securities just
to name a few. Many current software programs cannot distinguish between the
year 2000 and the year 1900. This can cause problems with retirement plan
distributions, dividend payment software, transaction software, and numerous
other areas that could impact the Funds. Calvert Group has been reviewing
all of its computer systems for Y2K compliance. Although, at this time,
there can be no assurance that there will be no negative impact on the
Funds, the Advisor, the underwriter, transfer agent and custodian have
advised the Funds that they have been actively working on any necessary
changes to their computer systems to prepare for Y2K and expect that their
systems, and those of their outside service providers, will be adapted in
time for that event. For more information, please visit our website at
www.calvertgroup.com.

HOW TO BUY SHARES

Getting Started - Before You Open an Account
You have a few decisions to make before you open an account in a mutual fund.

First, decide which fund or funds best suits your needs and your goals.

Second, decide what kind of account you want to open. Calvert offers
individual, joint, trust, Uniform Gifts/Transfers to Minor Accounts, and
several other types of accounts.

Shares of CTFR Vermont are sold with a front-end sales charge.

You will pay a sales charge at the time of each purchase. This table shows
the charges both as a percentage of offering price and as a percentage of
the amount you invest. The term "offering price" includes the front-end
sales charge. If you invest more, the sales charge will be lower. For
example, if you invest more than $50,000, or if your cumulative purchases or
the value in your account is more than $50,000,4 then the sales charge is
reduced to 3.00%.

Your investment in                      Sales Charge %      % of Amt.
                                        of offering price   Invested
Less than $50,000                       3.75%               3.90%
$50,000 but less than $100,000          3.00%               3.09%
$100,000 but less than $250,000         2.25%               2.30%
$250,000 but less than $500,000         1.75%               1.78%
$500,000 but less than $1,000,000       1.00%               1.01%
$1,000,000 and over                     None*               None*

4 This is called "Rights of Accumulation." The sales charge is calculated by
taking into account not only the dollar amount of the new purchase of
shares, but also the higher of cost or current value of shares you have
previously purchased in Calvert Group Funds that impose sales charges. This
automatically applies to your account for each new purchase of shares.

* Purchases of shares at NAV for accounts with $1,000,000 or more are
subject to a one year CDSC of 1.00%. See the "Calculation of Contingent
Deferred Sales Charge."

The front-end sales charge may be waived for certain purchases or investors,
such as participants in certain group retirement plans or other qualified
groups and clients of registered investment advisers. For details on these
and other purchases that may qualify for a reduced sales charge, see Exhibit
A.

Calculation of Contingent Deferred Sales Charge
The CDSC will not be charged on shares you received as dividends or from
capital gains distributions or on any capital appreciation (gain in the
value) of shares that are sold.

Shares that are not subject to the CDSC will be redeemed first, followed by
shares you have held the longest. The CDSC is calculated by determining the
share value at both the time of purchase and redemption and then multiplying
whichever value is less by the percentage that applies as shown above. If
you choose to sell only part of your shares, the capital appreciation for
those shares only is included in the calculation, rather than the capital
appreciation for the entire account.


Next Step - Account Application

Complete and sign an application for each new account. For more information,
contact your broker or our shareholder services department at 800-368-2748.

Minimum To Open an Account          Minimum additional
         $2,000                     investments -$250
Please make your check payable
to the Fund and mail it to:

         New Accounts:              Subsequent Investments:
         (include application)      (include investment slip)
         Calvert Group              Calvert Group
         P.O. Box 419544            P.O. Box 419739
         Kansas, City MO            Kansas City, MO
         64141-6544                 64141-6739

         By Registered,    Calvert Group
         Certified, or     c/o NFDS,
         Overnight Mail    330 West 9th St.
                           Kansas City, MO 64105-1807

         At the Calvert Office      Visit the Calvert Office to make
investments by check. See the back cover page for the address.

Important - How Shares are Priced
The price of shares is based on the Fund's net asset value ("NAV"). NAV is
computed by adding the value of a Fund's holdings plus other assets,
subtracting liabilities, and then dividing the result by the number of
shares outstanding.

Portfolio securities and other assets are valued based on market quotations,
except that securities maturing within 60 days are valued at amortized cost.
If market quotations are not readily available, securities are valued by a
method that the Fund's Board of Trustees/Directors believes accurately
reflects fair value.

The NAV is calculated as of the close of each business day, which coincides
with the closing of the regular session of the New York Stock Exchange
("NYSE") (normally 4 p.m. ET). The Fund is open for business each day the
NYSE is open. Please note that there are some federal holidays, however,
such as Columbus Day and Veterans' Day, when the NYSE is open and the Fund
is open but purchases cannot be received because the banks are closed.

When Your Account Will Be Credited
Your purchase will be processed at the NAV next calculated after your order
is received in good order. All of your purchases must be made in US dollars.
No cash will be accepted. No credit card or credit loan checks will be
accepted. The Fund reserves the right to suspend the offering of shares for
a period of time or to reject any specific purchase order. As a convenience,
check purchases received at Calvert's office in Bethesda, Maryland will be
sent by overnight delivery to the Transfer Agent and will be credited the
next business day upon receipt. Any check purchase received without an
investment slip may cause delayed crediting. If your check does not clear
your bank, your purchase will be canceled and you will be charged a $25 fee
plus any costs incurred. All purchases will be confirmed and credited to
your account in full and fractional shares (rounded to the nearest 1/1000th
of a share).

OTHER CALVERT GROUP FEATURES

Calvert Information Network
For 24 hour performance and account information call 800-368-2745 or visit
http://www.calvertgroup.com
You can obtain current performance and pricing information, verify account
balances, and authorize certain transactions with the convenience of one
phone call, 24 hours a day.

Account Services
By signing up for services when you open your account, you avoid having to
obtain a signature guarantee. If you wish to add services at a later date, a
signature guarantee to verify your signature may be obtained from any bank,
trust company and savings and loan association, credit union, broker-dealer
firm or member of a domestic stock exchange. A notary public cannot provide
a signature guarantee.

Calvert Money Controller
Calvert Money Controller allows you to purchase or sell shares by electronic
funds transfer without the time delay of mailing a check or the added
expense of a wire. Use this service to transfer up to $300,000
electronically. Allow one or two business days after you place your request
for the transfer to take place. Money transferred to purchase new shares
will be subject to a hold of up to 10 business days before redemption
requests will be honored. Transaction requests must be received by 4 p.m.
ET. You may request this service on your initial account application.
Calvert Money Controller transactions returned for insufficient funds will
incur a $25 charge.

Telephone Transactions
You may purchase, redeem, or exchange shares, wire funds and use Calvert
Money Controller by telephone if you have pre-authorized service
instructions. You receive telephone privileges automatically when you open
your account unless you elect otherwise. For our mutual protection, the
Fund, the shareholder servicing agent and their affiliates use precautions
such as verifying shareholder identity and recording telephone calls to
confirm instructions given by phone. A confirmation statement is sent for
most transactions; please review this statement and verify the accuracy of
your transaction immediately.

Exchanges
Calvert Group offers a wide variety of investment options that includes
common stock funds, tax-exempt and corporate bond funds, and money market
funds (call your broker or Calvert representative for more information). We
make it easy for you to purchase shares in other Calvert funds if your
investment goals change. The exchange privilege offers flexibility by
allowing you to exchange shares on which you have already paid a sales
charge from one mutual fund to another at no additional charge.

Complete and sign an account application, taking care to register your new
account in the same name and taxpayer identification number as your existing
Calvert account(s). Exchange instructions may then be given by telephone if
telephone redemptions have been authorized and the shares are not in
certificate form.

Before you make an exchange, please note the following:
Each exchange represents the sale of shares of one Fund and the purchase of
shares of another. Therefore, you could realize a taxable gain or loss.

You may exchange shares acquired by reinvestment of dividends or
distributions into another Calvert Fund at no additional charge.

Shares may only be exchanged for shares of the same class of another Calvert
Fund.

No CDSC is imposed on exchanges of shares subject to a CDSC at the time of
the exchange. The applicable CDSC is imposed at the time the shares acquired
by the exchange are redeemed.

Shareholders (and those managing multiple accounts) who make two purchases
and two redemptions of shares of the same Fund during any six-month period
will be given written notice and may be prohibited from placing additional
investments. This policy does not prohibit a shareholder from redeeming
shares of any Fund, and does not apply to trades solely between money market
funds.
The Fund reserves the right to terminate or modify the exchange privilege
with 60 days' written notice.

Combined General Mailings (Householding)
Multiple accounts with the same social security number will receive one
mailing per household of information such as prospectuses and semi-annual
and annual reports. You may request further grouping of accounts to receive
fewer mailings. Separate statements will be generated for each separate
account and will be mailed in one envelope for each combination above.

Special Services and Charges
The Fund pays for shareholder services but not for special services that are
required by a few shareholders, such as a request for a historical
transcript of an account. You may be required to pay a fee for these special
services.

If you are purchasing shares through a program of services offered by a
broker/dealer or financial institution, you should read the program
materials together with this Prospectus. Certain features may be modified in
these programs. Investors may be charged a fee if they effect transactions
in Fund shares through a broker or agent.

Minimum Account Balance
Please maintain a balance in each of your accounts of at least $1,000 per
class. If the balance in any of your accounts falls below the minimum during
a month, your account may be closed and the proceeds mailed to the address
of record. You will receive notice that your account is below the minimum,
and will be closed if the balance is not brought up to the required minimum
amount within 30 days.

Dividends, Capital Gains, and Taxes
The Fund pays dividends from its net investment income as shown below. Net
investment income consists of interest income, net short-term capital gains,
if any, and dividends declared and paid on investments, less expenses.
Distributions of net short-term capital gains (treated as dividends for tax
purposes) and net long-term capital gains, if any, are normally paid once a
year; however, the Fund does not anticipate making any such distributions
unless available capital loss carryovers have been used or have expired.

CTFR Vermont:              paid monthly

Dividend Payment Options
Dividends and any distributions are automatically reinvested in the same
Fund at NAV (without sales charge), unless you elect to have amounts of $10
or more paid in cash (by check or by Calvert Money Controller). Dividends
and distributions from any Calvert Group Fund may be automatically invested
in an identically registered account in any other Calvert Group Fund at NAV.
If reinvested in the same account, new shares will be purchased at NAV on
the reinvestment date, which is generally 1 to 3 days prior to the payment
date. You must notify the Fund in writing to change your payment options. If
you elect to have dividends and/or distributions paid in cash, and the US
Postal Service returns the check as undeliverable, it, as well as future
dividends and distributions, will be reinvested in additional shares. No
dividends will accrue on amounts represented by uncashed distribution or
redemption checks.

Buying a Dividend
At the time of purchase, the share price of each class may reflect
undistributed income, capital gains or unrealized appreciation of
securities. Any income or capital gains from these amounts which are later
distributed to you are fully taxable. On the record date for a distribution,
share value is reduced by the amount of the distribution. If you buy shares
just before the record date ("buying a dividend") you will pay the full
price for the shares and then receive a portion of the price back as a
taxable distribution.

Federal Taxes
Dividends derived from interest on municipal obligations constitute
exempt-interest dividends, on which you are not subject to federal income
tax. However, dividends which are from taxable interest and any
distributions of short term capital gain are taxable to you as ordinary
income. If the Fund makes any distributions of long-term capital gains, then
these are taxable to you as long-term capital gains, regardless of how long
you held your shares of the Fund. Dividends attributable to interest on
certain private activity bonds must be included in federal alternative
minimum tax for individuals and for corporations. The Fund may invest in and
derive up to 20% of its income from taxable short-term money market
investments, for liquidity purposes or pending investment. Interest earned
from taxable investments will be taxable as ordinary income.

If any taxable income or gains are paid, in January, the Fund will mail you
Form 1099-DIV indicating the federal tax status of dividends and any capital
gain distributions paid to you during the past year. Generally, dividends
and distributions are taxable in the year they are paid. However, any
dividends and distributions paid in January but declared during the prior
three months are taxable in the year declared. Dividends and distributions
are taxable to you regardless of whether they are taken in cash or
reinvested.

You may realize a capital gain or loss when you sell or exchange shares.
This capital gain or loss will be short- or long-term, depending on how long
you have owned the shares which were sold. In January, the Fund will mail
you Form 1099-B indicating the total amount of all sales, including
exchanges. You should keep your annual year-end account statements to
determine the cost (basis) of the shares to report on your tax returns.

Other Tax Information
Dividends derived from interest on Vermont state or local obligations are
exempt from Vermont personal income tax, as are dividends from obligations
issued by certain territories, such as Puerto Rico. The Fund will advise you
each January of the percent of dividends qualifying for this exemption. You
should consult your tax advisor with regard to how certain dividends affect
you.

Taxpayer Identification Number
If we do not have your correct Social Security or Taxpayer Identification
Number ("TIN") and a signed certified application or Form W-9, Federal law
requires us to withhold 31% of your reportable dividends, and possibly 31%
of certain redemptions. In addition, you may be subject to a fine by the
Internal Revenue Service. You will also be prohibited from opening another
account by exchange. If this TIN information is not received within 60 days
after your account is established, your account may be redeemed (closed) at
the current NAV on the date of redemption. Calvert Group reserves the right
to reject any new account or any purchase order for failure to supply a
certified TIN.

HOW TO SELL SHARES

You may redeem all or a portion of your shares on any day the Fund is open
for business, provided the amount requested is not on hold. When you
purchase by check or with Calvert Money Controller (electronic funds
transfer), the purchase will be on hold for up to 10 business days from the
date of receipt. During the hold period, redemptions proceeds will not be
sent until the Transfer Agent is reasonably satisfied that the purchase
payment has been
collected.

Your shares will be redeemed at the next NAV calculated after your
redemption request is received (less any applicable CDSC). The proceeds will
normally be sent to you on the next business day, but if making immediate
payment could adversely affect your Fund, it may take up to seven (7) days
to make payment. Calvert Money Controller redemptions generally will be
credited to your bank account by the second business day after your phone
call. The Funds have the right to redeem shares in assets other than cash
for redemption amounts exceeding, in any 90-day period, $250,000 or 1% of
the net asset value of the affected Fund, whichever is less. When the NYSE
is closed (or when trading is restricted) for any reason other than its
customary weekend or holiday closings, or under any emergency circumstances
as determined by the Securities and Exchange Commission, redemptions may be
suspended or payment dates postponed. Please note that there are some
federal holidays, however, such as Columbus Day and Veterans' Day, when the
NYSE is open and the Fund is open but redemptions cannot be mailed or wired
because the post offices and banks are closed.
Follow these suggestions to ensure timely processing of your redemption
request:

By Telephone
You may redeem shares from your account by telephone and have your money
mailed to your address of record or electronically transferred or wired to a
bank you have previously authorized. A charge of $5 may be imposed on wire
transfers of less than $1,000.

Written Requests
Calvert Group, P.O. Box 419544, Kansas City, MO 64141-6544
Your letter should include your account number and fund and the number of
shares or the dollar amount you are redeeming. Please provide a daytime
telephone number, if possible, for us to call if we have questions. If the
money is being sent to a new bank, person, or address other than the address
of record, your letter must be signature guaranteed.

Systematic Check Redemptions
If you maintain an account with a balance of $10,000 or more, you may have
up to two (2) redemption checks for a fixed amount sent to you on the 15th
of the month, simply by sending a letter with all information, including
your account number, and the dollar amount ($100 minimum). If you would like
a regular check mailed to another person or place, your letter must be
signature guaranteed. Shares subject to the one-year CDSC which are redeemed
by Systematic Check Redemption will be charged the CDSC.

Corporations and Associations
Your letter of instruction and corporate resolution should be signed by
person(s) authorized to act on the account, accompanied by signature
guarantee(s).

Trusts
Your letter of instruction should be signed by the Trustee(s) (as
Trustee(s)), with a signature guarantee. (If the Trustee's name is not
registered on your account, please provide a copy of the trust document,
certified within the last 60 days.)

Through your Dealer
Your dealer must receive your request before the close of regular trading on
the NYSE to receive that day's NAV. Your dealer will be responsible for
furnishing all necessary documentation to Calvert Group and may charge you
for services provided.


FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the Fund's
financial performance for the past 5 years. Certain information reflects
financial results for a single share. The total returns in the table
represent the rate that an investor would have earned (or lost) on an
investment in the Fund (assuming reinvestment of all dividends and
distributions), and does not reflect any applicable front- or back-end sales
charge. This information has been audited by PricewaterhouseCoopers LLP,
whose report, along with the Fund's financial statements, are included in
the Fund's annual report, which is available upon request.

                                             Years Ended
                            December 31,      December 31,     December 31,
Class A Shares                      1998              1997             1996
Net asset value, beginning        $16.45            $16.33           $16.62
Income from investment operations
     Net investment income           .78               .82              .88
     Net realized and unrealized
       gain (loss)                   .13               .26            (.25)
         Total from investment
           operations                .91              1.08              .63
Distributions from
     Net investment income         (.77)             (.82)            (.85)
     Net realized gains            (.31)             (.14)            (.07)
         Total distributions      (1.08)             (.96)            (.92)
Total increase (decrease) in
     net asset value               (.17)               .12            (.29)
Net asset value, ending           $16.28            $16.45           $16.33

Total return *                     5.67%             6.90%            3.98%
Ratios to average net assets:
     Net investment income         4.73%             5.11%            5.27%
     Total expenses +               .75%              .76%             .77%
     Net expenses                   .72%              .73%             .73%
Portfolio turnover                   32%               14%              24%
Net assets, ending
     (in thousands)              $51,292           $50,194          $49,774
Number of shares outstanding,
     ending (in thousands)         3,150             3,052            3,048

                                                      Years Ended
                                              December 31,     December 31,
Class A Shares                                        1995             1994
Net asset value, beginning                          $15.34           $16.66
Income from investment operations
     Net investment income                             .87              .87
     Net realized and unrealized gain (loss)          1.35           (1.35)
         Total from investment operations             2.22            (.48)
Distributions from
     Net investment income                           (.85)            (.84)
     Net realized gains                              (.09)               --
         Total distributions                         (.94)            (.84)
Total increase (decrease) in net asset value          1.28           (1.32)
Net asset value, ending                             $16.62           $15.34

Total return *                                      14.86%          (2.88%)
Ratios to average net assets:
     Net investment income                           5.35%            5.47%
     Total expenses +                                 .76%               --
     Net expenses                                     .75%             .73%
Portfolio turnover                                     12%              11%
Net assets, ending (in thousands)                  $60,203          $64,215
Number of shares outstanding,
     ending (in thousands)                           3,621            4,185

*        Total return does not reflect deduction of Class A front-end sales
charge.
+        Effective December 31, 1995, this ratio reflects total expenses
before reduction for fees paid indirectly; such reductions are included in
the ratio of net expenses. Total expenses are presented net of expense
waivers and reimbursements.

<PAGE>

EXHIBIT A

Reduced Sales Charges

You may qualify for a reduced sales charge through several purchase plans
available. You must notify the Fund at the time of purchase to take
advantage of the reduced sales charge.

Rights of Accumulation can be applied to several accounts
The sales charge breakpoints are automatically calculated for each account
based on the higher of cost or current value of shares previously purchased.
This privilege can be applied to a family group or other qualified group*
upon request. Shares could then be purchased at the reduced sales charge
which applies to the entire group; that is, based on the higher of cost or
current value of shares previously purchased and currently held by all the
members of the group.

Letter of Intent
If you (or your group, as described above) plan to purchase $50,000 or more
of Calvert Fund shares over the next 13 months, your sales charge may be
reduced through a "Letter of Intent." You pay the lower sales charge
applicable to the total amount you plan to invest over the 13-month period,
excluding any money market portfolio purchases. Part of your shares will be
held in escrow, so that if you do not invest the amount indicated, you will
have to pay the sales charge applicable to the smaller investment actually
made. For more information, see the SAI.

Neither the Funds, nor Calvert Distributors, Inc. ("CDI"), nor any affiliate
thereof will reimburse a plan or participant for any sales charges paid
prior to receipt of such written communication and confirmation by Calvert
Group. Plan administrators should send requests for the waiver of sales
charges based on the above conditions to: Calvert Group Retirement Plans,
4550 Montgomery Avenue, Suite 1000N, Bethesda, Maryland 20814.

* A "qualified group" is one which:
has been in existence for more than six months, and
has a purpose other than acquiring shares at a discount, and
satisfies uniform criteria which enable CDI and brokers offering shares to
realize economies of scale in distributing such shares.

A qualified group must have more than 10 members, must be available to
arrange for group meetings between representatives of CDI or brokers
distributing shares, must agree to include sales and other materials related
to the Funds in its publications and mailings to members at reduced or no
cost to CDI or brokers. A pension plan is not a qualified group for rights
of accumulation.

Other Circumstances
There is no sales charge on shares of any Fund of the Calvert Group of Funds
sold to (i) current or retired Directors, Trustees, or Officers of the
Calvert Group of Funds, employees of Calvert Group, Ltd. and its affiliates,
or their family members; (ii) CSIF Advisory Council Members, directors,
officers, and employees of any subadvisor for the Calvert Group of Funds,
employees of broker/dealers distributing the Fund's shares and immediate
family members of the Council, subadvisor, or broker/dealer; (iii) Purchases
made through a Registered Investment Advisor; (iv) Trust departments of
banks or savings institutions for trust clients of such bank or institution,
(v) Purchases through a broker maintaining an omnibus account with the Fund,
provided the purchases are made by (a) investment advisors or financial
planners placing trades for their own accounts (or the accounts of their
clients) and who charge a management, consulting, or other fee for their
services; or (b) clients of such investment advisors or financial planners
who place trades for their own accounts if such accounts are linked to the
master account of such investment advisor or financial planner on the books
and records of the broker or agent; or (c) retirement and deferred
compensation plans and trusts, including, but not limited to, those defined
in section 401(a) or section 403(b) of the I.R.C., and "rabbi trusts."

Dividends and Capital Gain Distributions from other Calvert Group Funds
You may prearrange to have your dividends and capital gain distributions
from another Calvert Group Fund automatically invested in another account
with no additional sales charge.

Purchases made at NAV
Except for money market funds, if you make a purchase at NAV, you may
exchange that amount to another Calvert Group Fund at no additional sales
charge.

Reinstatement Privilege
If you redeem shares and then within 30 days decide to reinvest in the same
Fund, you may do so at the net asset value next computed after the
reinvestment order is received, without a sales charge. You may use the
reinstatement privilege only once. The Funds reserve the right to modify or
eliminate this privilege.

EXHIBIT B

Service Fees and Arrangements with Dealers
Calvert Distributors, Inc., the Fund's underwriter, pays dealers a
commission, or reallowance (expressed as a percentage of the offering price)
when you purchase shares. CDI also pays dealers an ongoing service fee while
you own shares of a Fund (expressed as an annual percentage rate of average
daily net assets held in Calvert accounts by that dealer). The table below
shows the amount of
payment.

     Maximum Commission/Service Fees
     CTFR Vermont          3.00%/0.15%**

**If finder's fee is paid (see below), the service fee begins 13th month
after purchase.

Occasionally, CDI may reallow to dealers the full front-end sales charge.
CDI may also pay additional concessions, including non-cash promotional
incentives, such as merchandise or trips, to brokers employing registered
representatives who have sold or are expected to sell a minimum dollar
amount of shares of the Funds and/or shares of other Funds underwritten by
CDI. CDI may make expense reimbursements for special training of a broker's
registered representatives, advertising or equipment, or to defray the
expenses of sales contests. CAMCO, CDI, or their affiliates may pay certain
broker-dealers and/or other persons, for the sale and distribution of the
securities or for services to the Fund. Payments may include additional
compensation based on assets held through that firm beyond the regularly
scheduled rates, and finder's fees. CDI pays dealers a finder's fee on CTFR
Vermont shares purchased at NAV in accounts with $1 million or more. The
CTFR Vermont finder's fee is 1% of the NAV purchase amount on the first $2
million, .80% on $2 to $3 million, .50% on $3 to $50 million, .25% on $50 to
$100 million, and .15 over $100 million. All payments will be in compliance
with the rules of the National Association of Securities Dealers, Inc.

To Open an Account:
800-368-2748

Performance and Prices:
Calvert Information Network
24 hours, 7 days a week
800-368-2745

Service for Existing Accounts:
Shareholders 800-368-2745
Brokers 800-368-2746

TDD for Hearing-Impaired:
800-541-1524

Branch Office:
4550 Montgomery Avenue
Suite 1000N
Bethesda, Maryland 20814
Registered, Certified or
Overnight Mail:
Calvert Group
c/o NFDS
330 West 9th Street
Kansas City, MO 64105

Calvert Group Web-Site
Address: http://www.calvertgroup.com

PRINCIPAL UNDERWRITER
Calvert Distributors, Inc.
4550 Montgomery Avenue
Suite 1000N
Bethesda, Maryland 20814

<PAGE>

For investors who want more information about the Funds, the following
documents are available free upon request:

Annual/Semi-Annual Reports: Additional information about each Fund's
investments is available in the Fund's Annual and Semi-Annual reports to
shareholders. In each Fund's annual report, you will find a discussion of
the market conditions and investment strategies that significantly affected
the Fund's performance during its last fiscal year.

Statement of Additional Information (SAI): The SAI for each Fund provides
more detailed information about the Fund and is incorporated into this
prospectus by reference.

You can get free copies of reports and SAIs, request other information and
discuss your questions about the Funds by contacting your broker, or the
Funds at:

Calvert Group
4550 Montgomery Ave, Suite 1000N
Bethesda, Md. 20814

Telephone: 1-800-368-2745

Calvert Group Web-Site
Address: http://www.calvertgroup.com

You can review the Funds' reports and SAIs at the public Reference Room of
the Securities and Exchange Commission. You can get text only copies:

o        For a fee, by writing to or calling the Public Reference Room of
the Commission, Washington, D.C. 20549-6009, Telephone: 1-800-SEC-0330.

o        Free from the Commission's Internet website at http://www.sec.gov.

Investment Company Act file:        no. 811-3101 (CTFR)

<PAGE>


CALVERT TAX-FREE RESERVES
Money Market Portfolio
Limited-Term Portfolio
4550 Montgomery Avenue, Bethesda, Maryland 20814

Statement of Additional Information
                                April 30, 1999

TABLE OF CONTENTS

Investment Policies                                            1
Investment Restrictions                                        4
Purchases and Redemptions of Shares                            5
Dividends and Distributions                                    5
Tax Matters                                                    6
Valuation of Shares                                            6
Calculation of Yield and Total Return                          7
Advertising                                                    8
Trustees and Officers                                          9
Investment Advisor                                            11
Administrative Services                                       12
Transfer and Shareholder Servicing Agents                     12
Independent Accountants and Custodians                        12
Method of Distribution                                        13
Portfolio Transactions                                        13
General Information                                           13
Control Persons and Principal Holders of Securities           14
Appendix                                                      14

New Account Information
         (800) 368-2748
         (301) 951-4820

Shareholder Services
         (800) 368-2745

Broker Services
         (800) 368-2746
         (301) 951-4850

TDD for the Hearing- Impaired
         (800) 541-1524

         This  Statement  of  Additional  Information  is  not  a  prospectus.
Investors  should read the Statement of Additional  Information in conjunction
with the  Calvert  Tax-Free  Reserves  Prospectus,  dated  April 30,  1999 for
Class O and I, and February  28, 1999 for Class T, which may be obtained  free
of charge by writing the Fund at the above  address or calling  the  telephone
numbers listed above.

         The audited  financial  statements in the  Portfolios'  Annual Report
to  Shareholders  dated  December  31, 1998,  are  expressly  incorporated  by
reference  and made a part of this  Statement  of  Additional  Information.  A
copy of the  Annual  Report  may be  obtained  free of  charge by  writing  or
calling the Portfolios.

INVESTMENT POLICIES

         The Money Market  Portfolio and  Limited-Term  Portfolio  each invest
primarily in a diversified  portfolio of municipal  obligations whose interest
is  exempt  from  federal   income  tax.  The   Portfolios   differ  in  their
anticipated income yields,  quality,  length of average weighted maturity, and
capital value volatility.  The investment  objectives may only be changed with
shareholder  approval.  A complete  explanation of municipal  obligations  and
municipal bond and note ratings is set forth in the Appendix.
         The credit  rating of each  Portfolio's  assets as of its most recent
fiscal  year-end  appears in the Annual Report to  Shareholders,  incorporated
by reference herein.



Variable Rate Obligations and Demand Notes
         Each  Portfolio  may invest in variable  rate  obligations.  Variable
rate obligations have a yield that is adjusted  periodically  based on changes
in the level of prevailing  interest rates.  Floating rate obligations have an
interest rate fixed to a known lending rate,  such as the prime rate,  and are
automatically   adjusted   when  the  known  rate   changes.   Variable   rate
obligations lessen the capital  fluctuations  usually inherent in fixed income
investments.  This  diminishes the risk of capital  depreciation of investment
securities in a Portfolio and,  consequently,  of Portfolio  shares.  However,
if interest rates decline,  the yield of the invested  Portfolio will decline,
causing the  Portfolio  and its  shareholders  to forego the  opportunity  for
capital appreciation of the Portfolio's investments and of their shares.
         Each  Portfolio  may invest in floating rate and variable rate demand
notes.  Demand notes  provide  that the holder may demand  payment of the note
at its par value plus  accrued  interest by giving  notice to the  issuer.  To
ensure the ability of the issuer to make  payment on demand,  a bank letter of
credit or other liquidity facility may support the note.
         The Board of Trustees  has approved  investments  by the Money Market
Portfolio  in  floating  and  variable  rate demand  notes upon the  following
conditions:  the  Portfolio  has right of  demand,  upon  notice not to exceed
thirty days,  against the issuer to receive  payment;  the issuer will be able
to make  payment upon such  demand,  either from its own  resources or through
an  unqualified  commitment  from a  third  party;  and the  rate of  interest
payable  is  calculated  to ensure  that the  market  value of such notes will
approximate  par value on the  adjustment  dates.  The  remaining  maturity of
such  demand  notes is deemed  the  period  remaining  until  such time as the
Portfolio can recover the principal through demand.

Municipal Leases (Limited Term only)
         The   Portfolio   may  invest  in  municipal   leases  or  structured
instruments  where the underlying  security is a municipal  lease. A municipal
lease  is  an  obligation  of a  government  or  governmental  authority,  not
subject to voter  approval,  used to finance  capital  projects  or  equipment
acquisitions and payable through  periodic rental payments.  The Portfolio may
purchase  unrated leases.  There are additional risks inherent in investing in
this type of municipal  security.  Unlike  municipal notes and bonds,  where a
municipality  is obligated  by law to make  interest  and  principal  payments
when due,  funding for lease  payments  needs to be  appropriated  each fiscal
year in the budget.  It is possible that a municipality  will not  appropriate
funds for lease  payments.  The Advisor  considers risk of cancellation in its
investment  analysis.  The Fund's Advisor,  under the supervision of the Board
of  Trustees/Directors,  is responsible  for determining the credit quality of
such leases on an ongoing  basis,  including an assessment  of the  likelihood
that  the  lease  will  not  be  canceled.  Certain  municipal  leases  may be
considered   illiquid  and  subject  to  the  Portfolio's  limit  on  illiquid
securities.  The Board of  Trustees/Directors  has  directed  the  Advisor  to
treat a municipal  lease as a liquid  security if it satisfies  the  following
conditions:  (A)  such  treatment  must be  consistent  with  the  Portfolio's
investment  restrictions;  (B) the Advisor should be able to conclude that the
obligation  will maintain its liquidity  throughout the time it is held by the
Portfolio,  based on the  following  factors:  (1)  whether  the  lease may be
terminated by the lessee; (2) the potential  recovery,  if any, from a sale of
the leased property upon  termination of the lease;  (3) the lessee's  general
credit  strength  (e.g.,  its debt,  administrative,  economic  and  financial
characteristics  and  prospects);  (4) the  likelihood  that the  lessee  will
discontinue   appropriating  funding  for  the  leased  property  because  the
property  is  no  longer  deemed  essential  to  its  operations   (e.g.,  the
potential   for  an  "event  of   nonappropriation"),   and  (5)  any   credit
enhancement or legal recourse  provided upon an event of  nonappropriation  or
other  termination of the lease; and (C) the Advisor should determine  whether
the  obligation  can be disposed of within seven days in the  ordinary  course
of business at  approximately  the amount at which the Portfolio has valued it
for purposes of  calculating  the  Portfolio's  net asset  value,  taking into
account the following  factors:  (1) the  frequency of trades and quotes;  (2)
the  volatility  of  quotations  and trade  prices;  (3) the number of dealers
willing  to  purchase  or sell  the  security  and  the  number  of  potential
purchasers;  (4) dealer  undertakings  to make a market in the  security;  (5)
the nature of the security  and the nature of the  marketplace  trades  (e.g.,
the time needed to dispose of the security,  the method of soliciting  offers,
and the  mechanics  of the  transfer);  (6) the rating of the security and the
financial  condition  and  prospects  of the  issuer;  and (7)  other  factors
relevant to the Portfolio's ability to dispose of the security.


Obligations with Puts Attached
         The  Portfolios  have  authority  to purchase  securities  at a price
which would result in a yield to maturity  lower than that  generally  offered
by the  seller at the time of  purchase  when it can  acquire at the same time
the right to sell the  securities  back to the seller at an agreed  upon price
at any time  during a stated  period  or on a  certain  date.  Such a right is
generally denoted as a "put."  Unconditional  puts are readily  exercisable in
the event of a default in payment of principal  or interest on the  underlying
securities.  The Money Market Portfolio must limit its portfolio  investments,
including  puts, to  instruments of high quality as determined by a nationally
recognized statistical rating organization.

Temporary Investments
         Short-term money market type investments  consist of:  obligations of
the U.S.  Government,  its agencies  and  instrumentalities;  certificates  of
deposit  of banks  with  assets of one  billion  dollars  or more;  commercial
paper or other  corporate notes of investment  grade quality;  and any of such
items subject to short-term repurchase agreements.
         The Fund  intends to  minimize  taxable  income  through  investment,
when  possible,  in  short-term  tax-exempt  securities.  To minimize  taxable
income, the Fund may also hold cash which is not earning income.

Repurchase Agreements
         The  Portfolios  may purchase debt  securities  subject to repurchase
agreements,   which  are  arrangements  under  which  the  Portfolios  buys  a
security,  and the seller  simultaneously agrees to repurchase the security at
a  specified  time  and  price  reflecting  a  market  rate of  interest.  The
Portfolios  engages in  repurchase  agreements  in order to earn a higher rate
of return than they could earn simply by  investing  in the  obligation  which
is the subject of the  repurchase  agreement.  Repurchase  agreements are not,
however,  without risk. In the event of the  bankruptcy of a seller during the
term of a  repurchase  agreement,  a legal  question  exists as to whether the
Portfolios  would be deemed the owner of the  underlying  security or would be
deemed only to have a security  interest in and lien upon such  security.  The
Portfolios   will  only  engage  in  repurchase   agreements  with  recognized
securities  dealers and banks  determined  to present  minimal  credit risk by
the Advisor under the direction and  supervision of the  Portfolios'  Board of
Trustees.  In  addition,   the  Portfolios  will  only  engage  in  repurchase
agreements  reasonably  designed  to  secure  fully  during  the  term  of the
agreement the seller's  obligation to repurchase the  underlying  security and
will monitor the market value of the  underlying  security  during the term of
the  agreement.  If the value of the underlying  security  declines and is not
at least  equal to the  repurchase  price due the  Portfolios  pursuant to the
agreement,  the  Portfolios  will  require  the  seller to  pledge  additional
securities  or  cash  to  secure  the  seller's  obligations  pursuant  to the
agreement.  If the seller  defaults on its  obligation to  repurchase  and the
value of the  underlying  security  declines,  the Portfolios may incur a loss
and  may  incur  expenses  in  selling  the  underlying  security.  Repurchase
agreements  are  always  for  periods  of  less  than  one  year.   Repurchase
agreements not terminable within seven days are considered illiquid.

Reverse Repurchase Agreements
         The  Portfolios  may also  engage in reverse  repurchase  agreements.
Under a reverse  repurchase  agreement,  the Portfolios  sells securities to a
bank or  securities  dealer and agrees to  repurchase  those  securities  from
such  party at an  agreed  upon  date and price  reflecting  a market  rate of
interest.  The  Portfolios  invests the proceeds from each reverse  repurchase
agreement in obligations  in which it is authorized to invest.  The Portfolios
intends to enter into a reverse  repurchase  agreement  only when the interest
income  provided for in the  obligation  in which the  Portfolios  invests the
proceeds  is  expected  to  exceed  the  amount  the  Portfolios  will  pay in
interest to the other party to the agreement  plus all costs  associated  with
the  transactions.  The  Portfolios  does not  intend to borrow  for  leverage
purposes.  The  Portfolios  will only be  permitted  to  pledge  assets to the
extent necessary to secure borrowings and reverse repurchase agreements.
         During the time a reverse  repurchase  agreement is outstanding,  the
Portfolios  will  maintain  in a  segregated  account  an amount  of cash,  US
Government  securities or other liquid,  high-quality debt securities equal in
value to the repurchase  price.  The Portfolios  will mark to market the value
of assets held in the segregated  account,  and will place  additional  assets
in the  account  whenever  the  total  value of the  account  falls  below the
amount required under applicable regulations.
         The Portfolios'  use of reverse  repurchase  agreements  involves the
risk  that  the  other  party  to  the  agreements  could  become  subject  to
bankruptcy or  liquidation  proceedings  during the period the  agreements are
outstanding.  In such event,  the Portfolios may not be able to repurchase the
securities it has sold to that other party. Under those  circumstances,  if at
the  expiration of the  agreement  such  securities  are of greater value than
the proceeds  obtained by the Portfolios under the agreements,  the Portfolios
may have been better off had they not  entered  into the  agreement.  However,
the Portfolios will enter into reverse  repurchase  agreements only with banks
and dealers  which the Advisor  believes  present  minimal  credit risks under
guidelines  adopted by the  Portfolios'  Board of Trustees.  In addition,  the
Portfolios  bear the risk that the market  value of the  securities  they sold
may decline below the agreed-upon  repurchase  price, in which case the dealer
may request the Portfolios to post additional collateral.

When-Issued Purchases (Limited-Term only)
         New issues of  municipal  obligations  are  offered on a  when-issued
basis;  that is,  delivery and payment for the securities  normally take place
15 to 45 days after the date of the  transaction.  The payment  obligation and
the yield that will be received on the  securities  are each fixed at the time
the  buyer  enters  into  the   commitment.   The  Portfolio  will  only  make
commitments  to  purchase  these  securities  with the  intention  of actually
acquiring  them, but may sell these  securities  before the settlement date if
it is deemed advisable as a matter of investment strategy.
         Securities  purchased on a when-issued  basis and the securities held
in the Fund's  Portfolios  are  subject to changes in market  value based upon
the public's  perception of the  creditworthiness of the issuer and changes in
the level of interest rates (which will  generally  result in both changing in
value in the same way,  i.e.,  both  experiencing  appreciation  when interest
rates decline and  depreciation  when interest rates rise).  Therefore,  if in
order to  achieve  higher  interest  income,  the Fund  remains  substantially
fully  invested  at the  same  time  that  it has  purchased  securities  on a
when-issued basis,  there will be a greater  possibility that the market value
of the Fund's assets may vary.
         When  the  time  comes to pay for  when-issued  securities,  the Fund
will meet its  obligations  from then available cash flow,  sale of securities
or,  although  it  would  not  normally  expect  to do so,  from  sale  of the
when-issued  securities  themselves  (which may have a market value greater or
less than the Fund's  payment  obligation).  Sale of  securities  to meet such
obligations  carries  with  it a  greater  potential  for the  realization  of
capital  losses and capital  gains which are not exempt  from  federal  income
tax.  When issued  securities  do not earn income until they have in fact been
issued.
         When  the  Portfolio  purchases  a  when-issued   security,  it  will
maintain an amount of cash, cash  equivalents  (for example,  commercial paper
and daily  tender  adjustable  notes) or  short-term  high-grade  fixed income
securities  in a segregated  account so that the amount so  segregated  equals
the  market  value  of  the  when-issued   purchase,   thereby   ensuring  the
transaction is unleveraged.

Non-Investment Grade Debt Securities (Limited-Term only)
         Non-investment   grade  debt   securities   are  lower  quality  debt
securities  (generally  those  rated  BB or  lower  by S&P or Ba or  lower  by
Moody's,  known  as "junk  bonds."  These  securities  have  moderate  to poor
protection   of  principal   and  interest   payments  and  have   speculative
characteristics.  (See  Appendix  for a  description  of the  ratings.)  These
securities  involve  greater risk of default or price  declines due to changes
in  the  issuer's  creditworthiness  than  investment-grade  debt  securities.
Because the market for  lower-rated  securities may be thinner and less active
than for  higher-rated  securities,  there may be market price  volatility for
these  securities and limited  liquidity in the resale  market.  Market prices
for  these  securities  may  decline   significantly  in  periods  of  general
economic difficulty or rising interest rates.
         The  quality  limitation  set  forth  in the  Portfolio's  investment
policy is  determined  immediately  after  the  Portfolio's  acquisition  of a
given  security.  Accordingly,  any  later  change  in  ratings  will  not  be
considered  when   determining   whether  an  investment   complies  with  the
Portfolio's investment policy.
         When  purchasing  non-investment  grade  debt  securities,  rated  or
unrated,  the Advisor  prepare their own careful credit analysis to attempt to
identify  those issuers whose  financial  condition is adequate to meet future
obligations  or is expected to be  adequate in the future.  Through  portfolio
diversification   and  credit  analysis,   investment  risk  can  be  reduced,
although there can be no assurance that losses will not occur.

INVESTMENT RESTRICTIONS

Fundamental Investment Restrictions
         The  Portfolios  have adopted the  following  fundamental  investment
restrictions.  These  restrictions  cannot be changed  without the approval of
the holders of a majority of the outstanding shares of the Portfolios.

         (1)   Each   Portfolio   may   not   make   any   investment
         inconsistent  with  its   classification  as  a  diversified
         investment company under the 1940 Act.
         (2) Each Portfolio may not  concentrate  its  investments in
         the   securities  of  issuers   primarily   engaged  in  any
         particular   industry  (other  than  securities   issued  or
         guaranteed  by  the  U.S.  Government  or  its  agencies  or
         instrumentalities    and   repurchase   agreements   secured
         thereby or domestic bank money market instruments.)
         (3)  Each  Portfolio  may not  issue  senior  securities  or
         borrow  money,  except from banks for temporary or emergency
         purposes  and then  only in an  amount  up to 33 1/3% of the
         value  of  the  affected  Portfolio's  total  assets  or  as
         permitted   by  law  and  except  by   engaging  in  reverse
         repurchase  agreements,  where  allowed.  In order to secure
         any permitted  borrowings and reverse repurchase  agreements
         under this section,  each Portfolio may pledge,  mortgage or
         hypothecate its assets.
         (4) Each  Portfolio  may not  underwrite  the  securities of
         other  issuers,  except as  allowed  by law or to the extent
         that the purchase of  municipal  obligations  in  accordance
         with  a  Portfolio's   investment  objective  and  policies,
         either  directly  from the  issuer,  or from an  underwriter
         for an issuer, may be deemed an underwriting.
         (5) Each  Portfolio may not invest  directly in  commodities
         or  real  estate,   although  a  Portfolio   may  invest  in
         securities  which are  secured by real estate or real estate
         mortgages  and  securities  of issuers  which invest or deal
         in  commodities,  commodity  futures,  real  estate  or real
         estate mortgages.
         (6) Each  Portfolio  may not make loans,  other than through
         the  purchase of money  market  instruments  and  repurchase
         agreements  or by  the  purchase  of  bonds,  debentures  or
         other  debt   securities,   or  as  permitted  by  law.  The
         purchase  of all or a  portion  of an issue of  publicly  or
         privately  distributed  debt  obligations in accordance with
         each   Portfolio's   investment   objective,   policies  and
         restrictions, shall not constitute the making of a loan.

Nonfundamental Investment Restrictions
         The  Board of  Trustees  has  adopted  the  following  nonfundamental
investment  restrictions.  A  nonfundamental  investment  restriction  can  be
changed by the Board at any time without a shareholder vote.

         (1) Each Portfolio may not purchase common stocks, preferred
             stocks, warrants, or other equity securities.
         (2) Each Portfolio does not intend to make any purchases of
             securities if borrowing exceeds 5% of the affected Portfolio's
             total assets.
         (3) Each Portfolio may not sell securities short, purchase
             securities on margin, or write or purchase put or call options.
             The Funds reserve the right to purchase securities with puts
             attached or with demand features.
         (4) The Limited-Term Portfolio may not invest more than 15% of net
assets in non-investment grade debt                           securities and
the Portfolio does not intend to purchase more than 5% of non-investment
grade             securities.
         (5) The Limited-Term Portfolio may not maintain an average maturity
             of more than three years and the Portfolio does not intend to
             maintain an average maturity of more than one year.
         (6) The Portfolios may not purchase  illiquid  securities if
more than 10% of the value of that
              Portfolio's  net  assets  would  be  invested  in  such
securities.

PURCHASES AND REDEMPTIONS OF SHARES

         Share  certificates  will not be issued  unless  requested in writing
by the investor.  No charge will be made for share  certificate  requests.  No
certificates will be issued for fractional shares.
         Draft   writing  is  available   for  the  Money  Market   Portfolio.
Shareholders  wishing to use the draft  writing  service  should  complete the
signature  card enclosed with the  Investment  Application.  This service will
be  subject  to  the  customary  rules  and  regulations   governing  checking
accounts  and the  Portfolio  reserves  the  right to change  or  suspend  the
service.  Generally,  there is no  charge to you for the  maintenance  of this
service or the clearance of drafts,  but the  Portfolio  reserves the right to
charge  a  service  fee for  drafts  returned  for  insufficient  funds.  As a
service to shareholders,  the Portfolio may automatically  transfer the dollar
amount  necessary to cover  drafts you have  written on the  Portfolio to your
account  from any other of your  identically  registered  accounts  in Calvert
money market funds or Calvert  Insured  Plus.  The  Portfolio may charge a fee
for this service.
         Drafts  presented to the  Custodian  for payment  which would require
the  redemption  of shares  purchased by check or  electronic  funds  transfer
within the previous 10 business days will not be honored.
         When a payable  through draft  ("check") is presented for payment,  a
sufficient  number  of full  and  fractional  shares  from  the  shareholder's
account  to cover the amount of the draft  will be  redeemed  at the net asset
value next determined.  If there are insufficient  shares in the shareholder's
account, the draft will be returned.
         To change redemption  instructions  already given,  shareholders must
send a written notice to Calvert Group,  c/o NFDS, 6th Floor,  1004 Baltimore,
Kansas  City,  MO 64105,  with a voided  copy of a check  for the bank  wiring
instructions  to be added.  If a voided check does not  accompany the request,
then the request must be signature  guaranteed by a commercial  bank,  savings
and loan association,  trust company,  member firm of any national  securities
exchange,  or  credit  union.  Further  documentation  may  be  required  from
corporations, fiduciaries, and institutional investors.
         The  right of  redemption  may be  suspended  or the date of  payment
postponed  for any period  during which the New York Stock  Exchange is closed
(other than customary weekend and holiday  closings),  when trading on the New
York Stock Exchange is restricted,  or an emergency  exists,  as determined by
the  SEC,  or if  the  Commission  has  ordered  such  a  suspension  for  the
protection of shareholders.  Redemption  proceeds are normally mailed or wired
the next  business day after a proper  redemption  request has been  received,
unless redemptions have been suspended or postponed as described above.
         Redemption  proceeds  are  normally  paid  in  cash.   However,   the
Portfolio  has the  right to  redeem  shares  in  assets  other  than cash for
redemption  amounts  exceeding,  in any 90-day  period,  $250,000 or 1% of the
net asset value of the Portfolio, whichever is less.

DIVIDENDS AND DISTRIBUTIONS

         The  Money  Market   Portfolio   declares   daily  and  pays  monthly
dividends  of its daily net income to  shareholders  of record as of the close
of business each business day, thus allowing  daily  compounding of dividends.
The  Limited-Term  Portfolio  declares and pays  monthly  dividends of its net
income  to  shareholders  of  record  as of the  close  of  business  on  each
designated  monthly  record date.  Dividends  and  distributions  paid by each
Portfolio  may differ among the classes.  Net  investment  income  consists of
the interest  income  earned on  investments  (adjusted  for  amortization  of
original  issue  discounts  or premiums or market  premiums),  less  estimated
expenses.  Capital  gains,  if any, are normally  paid once a year and will be
automatically  reinvested at net asset value in additional  shares.  Dividends
and any  distributions  are  automatically  reinvested in additional shares of
the Fund,  unless you elect to have the  dividends of $10 or more paid in cash
(by check or by Calvert Money  Controller).  You may also request to have your
dividends  and  distributions  from the  Portfolio  invested  in shares of any
other  Calvert  Group Fund,  subject to the  applicable  sales charge for that
Fund or Portfolio.
         Purchasers  of  shares  of the  Money  Market  Portfolio  will  begin
receiving  dividends  upon the date  federal  funds are  received by the Fund.
Shareholders  redeeming  shares by  telephone  electronic  funds  transfer  or
written  request will receive  dividends  through the date that the redemption
request is received;  Money Market Portfolio  shareholders redeeming shares by
draft will  receive  dividends  up to the date such draft is  presented to the
Portfolio for payment.


                                 TAX MATTERS

         The   Portfolios   intend  to  continue   to  qualify  as   regulated
investment  companies under  Subchapter M of the Internal Revenue Code. If for
any reason one of the  Portfolios  should fail to  qualify,  it would be taxed
as a  corporation  at the fund level,  rather than passing  through its income
and gains to shareholders.
         The  Portfolio's   dividends  of  net  investment  income  constitute
exempt-interest  dividends on which  shareholders are not generally subject to
federal  income  tax;  however  under  the  Act,  dividends   attributable  to
interest  on  certain  private  activity  bonds  must be  included  in federal
alternative  minimum  taxable income for the purpose of determining  liability
(if any) for  individuals and for  corporations.  Each  Portfolio's  dividends
derived from taxable  interest and  distributions  of net  short-term  capital
gains,  whether taken in cash or reinvested in additional  shares, are taxable
to  shareholders  as  ordinary  income and do not  qualify  for the  dividends
received deduction for corporations.
         A  shareholder  may also be  subject  to  state  and  local  taxes on
dividends and distributions  from the Fund. The Fund will notify  shareholders
annually about the federal tax status of dividends and  distributions  paid by
the Fund and the amount of  dividends  withheld,  if any,  during the previous
year.
         The  Code  provides  that  interest  on   indebtedness   incurred  or
continued  in order to  purchase  or carry  shares of a  regulated  investment
company which  distributes  exempt-interest  dividends  during the year is not
deductible.  Furthermore,  entities or persons who are "substantial users" (or
persons  related to  "substantial  users") of  facilities  financed by private
activity bonds should consult their tax advisors before  purchasing  shares of
the Fund.  "Substantial  user" is generally defined as including a "non-exempt
person"  who  regularly  uses  in  trade  or  business  a part  of a  facility
financed from the proceeds of private activity bonds.
         Investors  should  note  that  the  Code  may  require  investors  to
exclude  the  initial  sales   charge,   if  any,  paid  on  the  purchase  of
Limited-Term  Portfolio  shares  from the tax  basis of  those  shares  if the
shares are exchanged  for shares of another  Calvert Group Fund within 90 days
of purchase.  This requirement  applies only to the extent that the payment of
the original  sales charge on the shares of the  Portfolio  causes a reduction
in the sales  charge  otherwise  payable  on the shares of the  Calvert  Group
Fund  acquired  in  the  exchange,  and  investors  may  treat  sales  charges
excluded  from the basis of the original  sales as incurred to acquire the new
shares.
         The Fund is required to withhold  31% of any  long-term  capital gain
dividends   and  31%  of  each   redemption   transaction   occurring  in  the
Limited-Term  Portfolio if: (a) the  shareholder's  social  security number or
other taxpayer  identification  number ("TIN") is not provided or an obviously
incorrect  TIN is  provided;  (b)  the  shareholder  does  not  certify  under
penalties of perjury that the TIN  provided is the  shareholder's  correct TIN
and that the  shareholder is not subject to backup  withholding  under section
3406(a)(1)(C)  of the Code  because  of  underreporting  (however,  failure to
provide  certification  as to the  application of section  3406(a)(1)(C)  will
result  only  in  backup  withholding  on  capital  gain  dividends,   not  on
redemptions);  or (c) the Fund is notified  by the  Internal  Revenue  Service
that the TIN provided by the  shareholder  is incorrect or that there has been
underreporting   of  interest  or  dividends  by  the  shareholder.   Affected
shareholders will receive  statements at least annually  specifying the amount
withheld.
         In  addition,  the  Limited-Term  Portfolio  is required to report to
the  Internal  Revenue  Service  the  following  information  with  respect to
redemption  transactions  in  the  Portfolio:   (a)  the  shareholder's  name,
address,  account number and taxpayer  identification  number;  (b) the dollar
value of the redemptions; and (c) the Portfolio's identifying CUSIP number.
         Certain   shareholders   are,   however,   exempt   from  the  backup
withholding and broker reporting  requirements.  Exempt shareholders  include:
corporations;  financial institutions;  tax-exempt  organizations;  individual
retirement  plans;  the  U.S.,  a State,  the  District  of  Columbia,  a U.S.
possession,  a  foreign  government,  an  international  organization,  or any
political  subdivision,  agency, or  instrumentality  of any of the foregoing;
U.S.  registered  commodities or securities  dealers;  real estate  investment
trusts;  registered  investment  companies;  bank common trust funds;  certain
charitable  trusts;  and foreign central banks of issue.  Non-resident  aliens
also are generally not subject to either  requirement  but, along with certain
foreign  partnerships  and  foreign  corporations,  may  instead be subject to
withholding under section 1441 of the Code.  Shareholders  claiming  exemption
from backup  withholding  and broker  reporting  should call or write the Fund
for further information.

                             VALUATION OF SHARES

Money Market Portfolio
         The Money  Market  Portfolio's  assets are  normally  valued at their
amortized cost, which does not take into account  unrealized  capital gains or
losses.  This  involves  valuing  an  instrument  at its cost  and  thereafter
assuming a constant  amortization  to  maturity  of any  discount  or premium,
regardless  of the impact of  fluctuating  interest  rates on the market value
of the instrument.  While this method provides certainty in valuation,  it may
result in periods  during which value,  as  determined  by amortized  cost, is
higher  or lower  than the  price  that  would be  received  upon  sale of the
instrument.


Limited-Term Portfolio
         The  Limited-Term   Portfolio's  assets  are  valued,  utilizing  the
average bid dealer  market  quotation as furnished by an  independent  pricing
service.  Securities  and other  assets for which  market  quotations  are not
readily  available  are  valued  based  on  the  current  market  for  similar
securities  or assets,  as  determined  in good  faith by the  Fund's  Advisor
under the supervision of the Board of Trustees.
         Each  Portfolio  determines  the net asset value of its shares  every
business  day at the  close  of the  regular  session  of the New  York  Stock
Exchange  (generally,  4:00 p.m. Eastern time), and at such other times as may
be necessary or  appropriate.  The Portfolios do not determine net asset value
on  certain  national  holidays  or  other  days on which  the New York  Stock
Exchange is closed:  New Year's Day, Martin Luther King Day,  Presidents' Day,
Good Friday,  Memorial Day,  Independence  Day, Labor Day,  Thanksgiving  Day,
and Christmas Day.

Net Asset Value and Offering Price Per Share, 12/31/98
Money Market Portfolio
         Class O ($1,355,321,661/1,355,203,424 shares)            $1.00

         Institutional Class ($246,966,868/246,940,916 shares)    $1.00
         Class T not available on 12/31/98

Limited-Term Portfolio
         Net asset value per share
         ($547,212,080/51,073,163 shares)                        $10.71
         Maximum sales charge
         (1.00% of offering price)                                 0.11
         Offering price per share                                $10.82




CALCULATION OF YIELD AND TOTAL RETURN

Money Market Portfolio
         From time to time the Money Market  Portfolio  advertises its "yield"
and  "effective  yield." Both yield figures are based on  historical  earnings
and are not  intended  to indicate  future  performance.  Yield is  calculated
separately by class.  The "yield" of the Money Market  Portfolio refers to the
income  generated by an  investment in the  Portfolio  over a particular  base
period  of time.  The  length  and  closing  date of the base  period  will be
stated in the  advertisement.  If the base  period is less than one year,  the
yield is then  "annualized."  That is, the net  change,  exclusive  of capital
changes,  in the value of a share  during  the base  period is  divided by the
net asset value per share at the  beginning  of the period,  and the result is
multiplied  by 365 and  divided  by the  number  of days in the  base  period.
Capital  changes  excluded  from the  calculation  of yield are:  (1) realized
gains  and  losses   from  the  sale  of   securities,   and  (2)   unrealized
appreciation  and  depreciation.   The  Money  Market  Portfolio's  "effective
yield" for a seven-day  period is its annualized  compounded  yield during the
period calculated according to the following formula:

Effective yield = (base period return + 1)365/7 - 1

For  the  seven-day   period  ended   December  31,  1998,  the  Money  Market
Portfolio's  yield for Class O shares  was 3.46% and its  effective  yield was
3.52%.  For the  seven-day  period ended  December 31, 1998,  the Money Market
Portfolio's  yield for the  Institutional  Class of  shares  was 3.78% and its
effective  yield was 3.86%.  Class T was not  available  on December 31, 1998;
therefore, no yield is presented.

         The Money Market  Portfolio  also may  advertise,  from time to time,
its  "tax  equivalent  yield."  The  tax  equivalent  yield  is the  yield  an
investor  would be required to obtain from  taxable  investments  to equal the
Portfolio's  yield,  all or a  portion  of which may be  exempt  from  federal
income taxes.  The tax  equivalent  yield is computed by taking the portion of
the  Portfolio's  effective  yield exempt from regular  federal income tax and
multiplying  the  exempt  yield by a factor  based  upon a stated  income  tax
rate,  then adding the  portion of the yield that is not exempt  from  regular
federal  income tax. The factor which is used to calculate the tax  equivalent
yield  is the  reciprocal  of the  difference  between  1 and  the  applicable
income  tax  rate,  which  will  be  stated  in  the  advertisement.  For  the
seven-day period ended December 31, 1998, the Money Market  Portfolio's  Class
O tax  equivalent  yield,  for an  investor  in the  36%  federal  income  tax
bracket was 5.50% and, for the 39.6% federal  income tax bracket,  5.83%.  For
the  seven-day  period ended  December 31,  1998,  the Money Market  Portfolio
Institutional  Class'  tax  equivalent  yield,  for an  investor  in  the  36%
federal  income tax bracket was 6.03% and,  for the 39.6%  federal  income tax
bracket, 6.39%. Class T was not available on December 31, 1998.


Limited-Term Portfolio
         From time to time, the Limited-Term  Portfolio  advertises its "total
return." Total return is calculated  separately  for each class.  Total return
is  historical in nature and is not intended to indicate  future  performance.
Total  return will be quoted for the most recent  one-year  period,  five-year
period,  and period  from  inception  of the  Portfolio's  offering of shares.
Total  return  quotations  for  periods  in excess of one year  represent  the
average  annual  total  return  for  the  period  included  in the  particular
quotation.  Total return is a computation of the  Portfolio's  dividend yield,
plus or minus realized or unrealized  capital  appreciation  or  depreciation,
less fees and expenses.  All total return quotations  reflect the deduction of
the  Portfolio's  maximum sales charge,  except  quotations of "return without
maximum  load"  which do not deduct  the sales  charge  and  "actual  return,"
which  reflect  deduction  of the sales  charge only for those  periods when a
sales charge was actually  imposed.  Thus,  in the formula  below,  for return
without maximum load, P = the entire $1,000  hypothetical  initial  investment
and does not reflect the deduction of any sales charge;  for actual return,  P
= a hypothetical  initial  payment of $1,000.  Note:  "Total Return" as quoted
in the  Financial  Highlights  section  of the  Fund's  Prospectus  and Annual
Report to Shareholders,  per SEC  instructions,  does not reflect deduction of
the  sales  charge,  and  corresponds  to  "return  without  maximum  load" as
referred to herein.  Return without  maximum load should be considered only by
investors,  such as  participants  in certain pension plans, to whom the sales
charge does not apply,  or for  purposes of  comparison  only with  comparable
figures  which also do not reflect  sales  charges,  such as Lipper  averages.
Total return is computed according to the following formula:

                               P(1 + T)n = ERV

where P = a  hypothetical  initial  payment of $1,000;  T = total return;  n =
number of  years;  and ERV = the  ending  redeemable  value of a  hypothetical
$1,000  payment  made at the  beginning  of the 1, 5 or 10 year periods at the
end of such periods (or portions thereof, if applicable).
         Returns for the periods indicated (ended 12/31/98) are as follows:



                  With Max. Load        W/O Max. Load

One Year          2.82%                 3.87%
Five Years        3.70%                 3.91%
Ten Years         4.75%                 4.86%

         The Limited-Term  Portfolio also  advertises,  from time to time, its
"yield" and "tax equivalent  yield." As with total return,  both yield figures
are historical and are not intended to indicate future performance.
         Unlike the yield quotations for the Money Market  Portfolio,  "yield"
quotations  for the  Limited-Term  Portfolio  refer to the  aggregate  imputed
yield-to-maturity  of each of the Portfolio's  investments based on the market
value  as of the last  day of a given  thirty-day  or  one-month  period  less
accrued expenses (net of  reimbursement),  divided by the average daily number
of  outstanding  shares  entitled  to  receive  dividends  times  the  maximum
offering  price on the  last day of the  period  (so  that the  effect  of the
sales  charge  is  included  in  the  calculation),   compounded  on  a  "bond
equivalent," or semi-annual,  basis.  The  Limited-Term  Portfolio's  yield is
computed according to the following formula:

                         Yield = 2[(a-b/cd)+1)6 - 1]
 
where a =  dividends  and  interest  earned  during the  period;  b = expenses
accrued for the period (net of  reimbursement);  c = the average  daily number
of shares  outstanding  during  the  period  that  were  entitled  to  receive
dividends;  and d = the  maximum  offering  price per share on the last day of
the period.  Using this  calculation,  the Limited-Term  Portfolio's yield for
the month ended December 31, 1998 was 3.07%.
         The tax  equivalent  yield is the yield an investor would be required
to obtain  from  taxable  investments  to equal the  Limited-Term  Portfolio's
yield,  all or a portion of which may be exempt  from  federal  income  taxes.
The tax  equivalent  yield is computed for each class by taking the portion of
the yield exempt from regular  federal income tax and  multiplying  the exempt
yield by a factor  based  upon a stated  income  tax  rate,  then  adding  the
portion of the yield that is not exempt from regular  federal  income tax. The
factor which is used to calculate the tax  equivalent  yield is the reciprocal
of the  difference  between 1 and the applicable  income tax rate,  which will
be stated in the  advertisement.  For the thirty-day period ended December 31,
1998, the  Portfolio's  tax equivalent  yield was 4.80% for an investor in the
36%  federal  income  tax  bracket,  and  5.08% for an  investor  in the 39.6%
federal income tax bracket.

                                 ADVERTISING

         The Fund or its affiliates may provide  information  such as, but not
limited  to,  the  economy,   investment   climate,   investment   principles,
sociological  conditions  and  political  ambiance.   Discussion  may  include
hypothetical  scenarios  or  lists of  relevant  factors  designed  to aid the
investor in  determining  whether the Fund is compatible  with the  investor's
goals.  The Fund may list  portfolio  holdings or give  examples or securities
that may have been  considered  for inclusion in the  Portfolio,  whether held
or not.
         The Fund or its affiliates may supply  comparative  performance  data
and rankings from  independent  sources such as Donoghue's  Money Fund Report,
Bank Rate Monitor,  Money,  Forbes,  Lipper  Analytical  Services,  Inc.,  CDA
Investment  Technologies,  Inc.,  Wiesenberger  Investment  Companies Service,
Russell  2000/Small  Stock  Index,  Mutual  Fund Values  Morningstar  Ratings,
Mutual Fund  Forecaster,  Barron's,  The Wall Street  Journal,  and Schabacker
Investment  Management,  Inc.  Such  averages  generally  do not  reflect  any
front-  or  back-end  sales  charges  that  may be  charged  by  Funds in that
grouping.  The Fund may also cite to any source,  whether in print or on-line,
such as Bloomberg,  in order to acknowledge  origin of  information.  The Fund
may compare  itself or its portfolio  holdings to other  investments,  whether
or not issued or  regulated by the  securities  industry,  including,  but not
limited  to,  certificates  of  deposit  and  Treasury  notes.  The Fund,  its
Advisor,  and its affiliates reserve the right to update performance  rankings
as new rankings become available.
         Calvert   Group  is  the   nation's   leading   family  of   socially
responsible  mutual funds, both in terms of socially  responsible  mutual fund
assets  under  management,  and number of  socially  responsible  mutual  fund
portfolios  offered  (source:  Social  Investment  Forum,  December 31, 1998).
Calvert  Group was also the first to offer a family  of  socially  responsible
mutual fund portfolios.

                            TRUSTEES AND OFFICERS

         The Fund's Board of Trustees/Directors supervises the Fund's
activities and reviews its contracts with companies that provide it with
services.
         RICHARD  L.  BAIRD,  JR.,  Trustee.   Mr.  Baird  is  Executive  Vice
President for the Family Health Council, Inc. in Pittsburgh,  Pennsylvania,  a
non-profit  corporation  which provides family planning  services,  nutrition,
maternal/child  health care, and various health screening services.  Mr. Baird
is a  trustee/director  of each of the  investment  companies  in the  Calvert
Group of Funds,  except for Calvert Variable Series,  Inc.,  Calvert New World
Fund, Inc. and Calvert World Values Fund,  Inc. DOB:  05/09/48.  Address:  211
Overlook Drive, Pittsburgh, Pennsylvania 15216.
         FRANK H. BLATZ,  JR.,  Esq.,  Trustee.  Mr. Blatz is a partner in the
law firm of Snevily,  Ely,  Williams & Blatz.  He was  formerly a partner with
Abrams,  Blatz,  Gran,  Hendricks  &  Reina,  P.A.  He is also a  director  of
Calvert Variable Series, Inc. DOB: 10/29/35.  Address:  308 East Broad Street,
Westfield, New Jersey 07091.
         FREDERICK T. BORTS, M.D., Trustee. Dr. Borts is a radiologist with
Kaiser Permanente. Prior to that, he was a radiologist at Bethlehem Medical
Imaging in Allentown, Pennsylvania. DOB: 07/23/49. Address: 16 Iliahi
Street, Honolulu, Hawaii, 96817.
         CHARLES E. DIEHL,  Trustee.  Mr. Diehl is a self-employed  consultant
and  is  Vice  President  and  Treasurer  Emeritus  of the  George  Washington
University.   He  has  retired  from  University  Support  Services,  Inc.  of
Herndon,  Virginia.  Formerly,  he  was  a  Director  of  Acacia  Mutual  Life
Insurance   Company,   and  is  currently  a  Director  of  Servus   Financial
Corporation.   DOB:  10/13/22.  Address:  1658  Quail  Hollow  Court,  McLean,
Virginia 22101.
         DOUGLAS E. FELDMAN,  M.D.,  Trustee.  Dr. Feldman is managing partner
of  Feldman  Otolaryngology,  Head and Neck  Surgery  in  Washington,  D.C.  A
graduate  of  Harvard   Medical   School,   he  is   Associate   Professor  of
Otolaryngology,  Head and Neck  Surgery at  Georgetown  University  and George
Washington  University  Medical School, and past Chairman of the Department of
Otolaryngology,  Head and Neck Surgery at the Washington  Hospital Center.  He
is  included in The Best  Doctors in America.  DOB:  05/23/48.  Address:  7536
Pepperell Drive, Bethesda, Maryland 20817.
         PETER W. GAVIAN,  CFA, Trustee.  Mr. Gavian is President of Corporate
Finance of  Washington,  Inc.  Formerly,  he was a principal of Gavian De Vaux
Associates,  an  investment  banking  firm.  He is also a Chartered  Financial
Analyst and an accredited senior business appraiser.  DOB: 12/08/32.  Address:
3005 Franklin Road North, Arlington, Virginia 22201.
         JOHN G. GUFFEY,  JR., Trustee.  Mr. Guffey is organizing  director of
the Community Capital Bank in Brooklyn,  New York, and a financial  consultant
to various  organizations.  In  addition,  he is a director  of the  Community
Bankers Mutual Fund of Denver,  Colorado,  a director of Ariel Funds,  and the
Treasurer  and Director of Silby,  Guffey,  and Co.,  Inc., a venture  capital
firm.  Mr.  Guffey  is a  trustee/director  of  each of the  other  investment
companies in the Calvert Group of Funds,  except for Calvert  Variable Series,
Inc. and Calvert New World Fund, Inc.
        Mr.  Guffey  has  been  advised  that  the   Securities  and  Exchange
Commission  ("SEC")  has entered an order  against him  relating to his former
service as a director of  Community  Bankers  Mutual Fund,  Inc.  This fund is
not  connected  with  any  Calvert  Fund  or  the  Calvert  Group  and  ceased
operations  in  September,  1994.  Mr.  Guffey  consented  to the entry of the
order  without  admitting  or denying  the  findings  in the order.  The order
contains  findings (1) that the Community  Bankers  Mutual  Fund's  prospectus
and statement of additional  information  were materially false and misleading
because  they  misstated  or failed to state  material  facts  concerning  the
pricing of fund  shares  and the  percentage  of  illiquid  securities  in the
fund's  portfolio  and  that Mr.  Guffey,  as a member  of the  fund's  board,
should  have  known  of  these   misstatements  and  therefore   violated  the
Securities  Act of 1933;  (2) that the price of the fund's  shares sold to the
public  was not  based  on the  current  net  asset  value of the  shares,  in
violation  of the  Investment  Company  Act of 1940 (the  "Investment  Company
Act");  and (3) that the board of the fund,  including  Mr.  Guffey,  violated
the  Investment  Company Act by  directing  the filing of a  materially  false
registration  statement.  The order  directed  Mr.  Guffey to cease and desist
from  committing or causing  future  violations  and to pay a civil penalty of
$5,000.  The SEC placed no restrictions  on Mr.  Guffey's  continuing to serve
as a Trustee or Director of mutual funds. DOB:  05/15/48.  Address:  388 Calli
Calina, Santa Fe, New Mexico 87501.
         *BARBARA J. KRUMSIEK,  President and Trustee.  Ms. Krumsiek serves as
President,  Chief Executive  Officer and Vice Chairman of Calvert Group,  Ltd.
and as an officer and director of each of its affiliated  companies.  She is a
director of Calvert-Sloan  Advisers,  L.L.C., and a  trustee/director  of each
of the  investment  companies in the Calvert Group of Funds.  Ms.  Krumsiek is
the President of each of the investment  companies,  except for Calvert Social
Investment  Fund, of which she is the Senior Vice President.  Prior to joining
Calvert Group,  Ms.  Krumsiek  served as a Managing  Director of Alliance Fund
Distributors, Inc. DOB: 08/09/52.
         M. CHARITO  KRUVANT,  Trustee.  Ms.  Kruvant is President  and CEO of
Creative  Associates  International,  Inc., a firm that  specializes  in human
resources  development,  information  management,  public  affairs and private
enterprise  development.  She is also a Director of Calvert  Variable  Series,
Inc.,  and  Acacia  Federal  Savings  Bank.  DOB:  12/08/45.   Address:   5301
Wisconsin Avenue, N.W., Washington, D.C. 20015.
         ARTHUR J. PUGH,  Trustee.  Mr. Pugh is a Director of Calvert Variable
Series,  Inc., and serves as a director of Acacia Federal  Savings Bank.  DOB:
09/24/37. Address: 4823 Prestwick Drive, Fairfax, Virginia 22030.
         *DAVID R. ROCHAT,  Senior Vice  President and Trustee.  Mr. Rochat is
Executive Vice President of Calvert Asset Management  Company,  Inc., Director
and Secretary of Grady,  Berwald and Co.,  Inc., and Director and President of
Chelsea  Securities,  Inc. He is the Senior Vice  President of First  Variable
Rate Fund,  Calvert Tax-Free  Reserves,  Calvert Municipal Fund, Inc., Calvert
Cash  Reserves,  and  The  Calvert  Fund.  DOB:  10/07/37.  Address:  Box  93,
Chelsea, Vermont 05038.
         *D. WAYNE SILBY, Esq.,  Trustee.  Mr. Silby is a trustee/director  of
each of the  investment  companies in the Calvert  Group of Funds,  except for
Calvert  Variable  Series,  Inc.  and  Calvert New World  Fund.  Mr.  Silby is
Executive  Chairman  of Group  Serve,  Inc.,  an internet  company  focused on
community  building   collaborative  tools,  and  an  officer,   director  and
shareholder  of  Silby,  Guffey &  Company,  Inc.,  which  serves  as  general
partner  of  Calvert  Social  Venture  Partners  ("CSVP").  CSVP is a  venture
capital firm investing in socially  responsible small companies.  He is also a
Director of Acacia Mutual Life  Insurance  Company.  DOB:  07/20/48.  Address:
1715 18th Street, N.W., Washington, D.C. 20009.
         RENO J. MARTINI,  Senior Vice  President.  Mr.  Martini is a director
and Senior Vice  President of Calvert  Group,  Ltd., and Senior Vice President
and Chief  Investment  Officer of Calvert Asset Management  Company,  Inc. Mr.
Martini is also a director and President of  Calvert-Sloan  Advisers,  L.L.C.,
and a director and officer of Calvert New World Fund. DOB: 1/13/50.
         RONALD M.  WOLFSHEIMER,  CPA,  Treasurer.  Mr.  Wolfsheimer is Senior
Vice  President and Chief  Financial  Officer of Calvert  Group,  Ltd. and its
subsidiaries and an officer of each of the other  investment  companies in the
Calvert Group of Funds.  Mr.  Wolfsheimer  is Vice  President and Treasurer of
Calvert-Sloan Advisers,  L.L.C., and a director of Calvert Distributors,  Inc.
DOB: 07/24/47.
         WILLIAM  M.  TARTIKOFF,  Esq.,  Vice  President  and  Secretary.  Mr.
Tartikoff  is an officer of each of the  investment  companies  in the Calvert
Group of Funds, and is Senior Vice President,  Secretary,  and General Counsel
of Calvert Group,  Ltd., and each of its  subsidiaries.  Mr. Tartikoff is also
Vice President and Secretary of  Calvert-Sloan  Advisers,  L.L.C.,  a director
of Calvert  Distributors,  Inc.,  and is an officer  of Acacia  National  Life
Insurance Company. DOB: 08/12/47.
         DANIEL K. HAYES,  Vice  President.  Mr.  Hayes is Vice  President  of
Calvert  Asset  Management  Company,  Inc.,  and is an  officer of each of the
other investment  companies in the Calvert Group of Funds,  except for Calvert
New World Fund, Inc. DOB: 09/09/50.
         SUSAN  WALKER  BENDER,  Esq.,  Assistant  Secretary.  Ms.  Bender  is
Associate  General  Counsel of Calvert  Group,  Ltd. and an officer of each of
its subsidiaries  and  Calvert-Sloan  Advisers,  L.L.C. She is also an officer
of each of the  other  investment  companies  in the  Calvert  Group of Funds.
DOB: 01/29/59.
         KATHERINE STONER, Esq., Assistant Secretary. Ms. Stoner is
Associate General Counsel of Calvert Group and an officer of each of its
subsidiaries and Calvert-Sloan Advisers, L.L.C. She is also an officer of
each of the other investment companies in the Calvert Group of Funds. DOB:
10/21/56.
         IVY WAFFORD DUKE, Esq.,  Assistant  Secretary.  Ms. Duke is Associate
General  Counsel of Calvert  Group and an officer of each of its  subsidiaries
and  Calvert-Sloan  Advisers,  L.L.C.  She is also an  officer  of each of the
other  investment  companies in the Calvert  Group of Funds and  Secretary and
provides  counsel  to the  Calvert  Social  Investment  Foundation.  Prior  to
working  at  Calvert  Group,  Ms.  Duke  was an  Associate  in the  Investment
Management  Group of the Business and Finance  Department at Drinker  Biddle &
Reath. DOB: 09/07/68.
         VICTOR FRYE, Esq.,  Assistant Secretary and Compliance  Officer.  Mr.
Frye is Counsel  and  Compliance  Officer  of Calvert  Group and an officer of
each of its  subsidiaries  and  Calvert-Sloan  Advisers,  L.L.C. He is also an
officer of each of the other  investment  companies  in the  Calvert  Group of
Funds.  Prior to working at Calvert  Group,  Mr.  Frye was Counsel and Manager
of the Compliance Department at The Advisors Group. DOB: 10/15/58.

         The address of directors and officers,  unless  otherwise  noted,  is
4550 Montgomery Avenue, Suite 1000N,  Bethesda,  Maryland 20814.  Trustees and
officers  of the Fund as a group  own less than 1% of the  Fund's  outstanding
shares.  Trustees  marked with an *, above,  are  "interested  persons" of the
Fund, under the Investment Company Act of 1940.
         Each   of   the   above   directors/trustees   and   officers   is  a
director/trustee  or  officer  of  each  of the  investment  companies  in the
Calvert Group of Funds with the exception of Calvert Social  Investment  Fund,
of which only Messrs.  Baird,  Guffey and Silby and Ms. Krumsiek are among the
trustees,  Calvert Variable Series,  Inc., of which only Messrs.  Blatz, Diehl
and Pugh and Mmes.  Krumsiek  and  Kruvant  are among the  directors,  Calvert
World  Values  Fund,  Inc.,  of which  only  Messrs.  Guffey and Silby and Ms.
Krumsiek are among the directors,  and Calvert New World Fund,  Inc., of which
only Ms. Krumsiek and Mr. Martini are among the directors.
         The  Audit  Committee  of the Board is  composed  of  Messrs.  Baird,
Blatz,  Feldman,  Guffey  and Pugh and Ms.  Kruvant.  The  Board's  Investment
Policy  Committee  is composed of Messrs.  Borts,  Diehl,  Gavian,  Rochat and
Silby and Ms. Krumsiek.
         During  1998,  Trustees  of the Fund not  affiliated  with the Fund's
Advisor were paid  $169,091  and $57,879 by the Money Market and  Limited-Term
Portfolios,  respectively.  Trustees  of the  Fund  not  affiliated  with  the
Advisor  currently  receive an annual fee of $20,500  for  service as a member
of the Board of Trustees  of the Calvert  Group of Funds plus a fee of $750 to
$1500 for each Board and Committee meeting  attended;  such fees are allocated
among the Funds on the basis of their net assets.
         Trustees  of the Fund not  affiliated  with the  Fund's  Advisor  may
elect to defer  receipt of all or a  percentage  of their fees and invest them
in any fund in the  Calvert  Family of Funds  through  the  Trustees  Deferred
Compensation  Plan (shown as "Pension or Retirement  Benefits  Accrued as part
of Fund  Expenses,"  below).  Deferral of the fees is designed to maintain the
parties in the same position as if the fees were paid on a current basis.

Trustee Compensation Table

Fiscal Year 1998      Aggregate         Pension or     Total Compensation
                      Compensation      Retirement     from Benefits
(unaudited numbers)   from Registrant   Accrued as     Registrant and Fund
                      for Service       part of         Complex paid to
                      as Trustee        of Registrant     Trustee**
                                        Expenses*

Name of Trustee

Richard L. Baird, Jr. $24,732           $0                $39,550
Frank H. Blatz, Jr.   $25,797           $25,797           $42,100
Frederick T. Borts    $23,674           $0                $33,250
Charles E. Diehl      $25,803           $25,803           $41,500
Douglas E. Feldman    $25,797           $0                $36,250
Peter W. Gavian       $25,804           $12,902           $36,250
John G. Guffey, Jr.   $24,768           $0                $62,665
M. Charito Kruvant    $25,797           $15,477           $36,250
Arthur J. Pugh        $25,797           $0                $41,500
D. Wayne Silby        $24,739           $0                $67,780

*Messrs. Blatz, Diehl, Gavian and Pugh and Ms. Kruvant have chosen to defer
a portion of their compensation. As of December 31, 1998, total deferred
compensation, including dividends and capital appreciation, was $644,247.37,
$672,374.09, $172,445.85, $216,322.53, and $23,295.55, for each trustee,
respectively.
**The Fund Complex consists of nine (9) registered investment companies.

                              INVESTMENT ADVISOR

         The Fund's  Investment  Advisor is Calvert Asset Management  Company,
Inc.,  4550  Montgomery  Avenue,  Suite 1000N,  Bethesda,  Maryland  20814,  a
subsidiary  of  Calvert  Group,  Ltd.,  which is a  controlled  subsidiary  of
Ameritas Acacia Mutual Holding Company of Lincoln, Nebraska.
         The  Advisory  Contract  between the Fund and the Advisor will remain
in effect  indefinitely,  provided  continuance  is approved at least annually
by the vote of the  holders of a  majority  of the  outstanding  shares of the
Fund,  or by  the  Trustees  of the  Fund;  and  further  provided  that  such
continuance  is  also  approved  annually  by the  vote of a  majority  of the
Trustees  of the  Fund  who are not  parties  to the  Contract  or  interested
persons of such  parties,  cast in person at a meeting  called for the purpose
of voting on such  approval.  The Contract may be terminated  without  penalty
by  either  party  on  60  days'  prior  written  notice;   it   automatically
terminates in the event of its assignment.
         Under  the  Contract,   the  Advisor   manages  the   investment  and
reinvestment  of the Fund's  assets,  subject to the  direction and control of
the Fund's  Board of  Trustees.  For its  services,  the  Advisor  receives an
annual fee of:
         i) with  respect to the Money  Market  Portfolio,  prior to August 1,
1997,  the fees  were  0.50% of the first  $500  million  of such  Portfolio's
average daily net assets,  0.45% of the next $500 million of such assets,  and
0.40% of all such assets over $1 billion.  Effective  August 1, 1997, the fees
changed to 0.25% of the first $500 million of such  Portfolio's  average daily
net assets,  0.20% of the next $500 million of such  assets,  and 0.15% of all
such assets over $1 billion; and
         ii) with respect to the  Limited-Term  Portfolio,  0.60% of the first
$500 million of the  Portfolio's  average daily net assets,  0.50% of the next
$500 million of such assets, and 0.40% of all such assets over $1 billion.
         The advisory fee is payable  monthly.  The Advisor reserves the right
(i)  to  waive  all or a part  of its  fee  and  (ii)  to  compensate,  at its
expense,   broker-dealers   in   consideration   of  their   promotional   and
administrative services.
         The Advisor  provides the Fund with  investment  advice and research,
pays the  salaries  and fees of all  Trustees  and  executive  officers of the
Fund who are  principals  of the Advisor,  and pays  certain Fund  advertising
and  promotional  expenses.   The  Fund  pays  all  other  administrative  and
operating  expenses,   including:   custodial  fees;   shareholder  servicing,
dividend  disbursing and transfer  agency fees;  administrative  service fees;
federal and state securities  registration  fees;  insurance  premiums;  trade
association  dues;  interest,  taxes and other business fees;  legal and audit
fees; and brokerage  commissions and other costs  associated with the purchase
and sale of portfolio securities.
         The  Advisor  may   voluntarily   reimburse   the  Money  Market  and
Limited-Term  Portfolios  for  expenses.  The advisory  fees paid by the Money
Market  Portfolio  to  Calvert  Asset  Management   Company  were  $7,776,716,
$5,409,090,  and  $3,109,517,  for years 1996,  1997, and 1998,  respectively.
The  advisory  fees  paid  by the  Limited-Term  Portfolio  to  Calvert  Asset
Management  Company were  $3,110,764,  $3,164,772,  and $3,048,758,  for years
1996, 1997, and 1998, respectively.
         For Portfolios with multiple  classes,  investment  advisory fees are
allocated as a Portfolio level expense based on net assets.

ADMINISTRATIVE SERVICES

         Calvert  Administrative  Services  Company  ("CASC"),  a wholly-owned
subsidiary of Calvert  Group,  Ltd.,  has been retained by the Fund to provide
certain  administrative  services  necessary  to the  conduct  of  the  Fund's
affairs.  Prior to August 1, 1997,  CASC  received a fee of $200,000  per year
for providing  such  services,  allocated  among  Portfolios  based on assets.
Effective August 1, 1997, the Money Market Class O,  Institutional  Class, and
Class T pay annual rates of 0.26%,  0.05%,  and 0.25%  respectively,  based on
average  daily net assets.  Limited-Term  and other  portfolios of CTFR pay an
annual fee of $80,000,  allocated among the portfolios  based on average daily
net assets.  The service  fees paid by the Money  Market  Portfolio to Calvert
Administrative  Services  Company were $128,255 for fiscal year 1996. The 1997
administrative  service  fees paid by CTFR Money  Market were  $1,682,754  and
$24,010  for  Class O and the  Institutional  Class,  respectively.  The  1998
administrative  service  fees paid by CTFR Money  Market were  $1,682,754  and
$24,010 for Class O and the  Institutional  Class,  respectively.  Class T was
not available  during fiscal year 1998. The  administrative  service fees paid
by the  Limited-Term  Portfolio to CASC were  $38,242,  $43,210,  and $41,317,
for years 1996, 1997, and 1998, respectively.
         Administrative  service fees are allocated as a class-level  expense,
again based on net assets.

TRANSFER AND SHAREHOLDER SERVICING AGENTS

         National Financial Data Services,  Inc. ("NFDS"),  330 W. 9th Street,
Kansas City,  Missouri  64105, a subsidiary of State Street Bank & Trust,  has
been  retained by the Fund to act as transfer  agent and  dividend  disbursing
agent.  These  responsibilities  include:  responding  to certain  shareholder
inquiries and instructions,  crediting and debiting  shareholder  accounts for
purchases and  redemptions  of Fund shares and confirming  such  transactions,
and  daily  updating  of  shareholder  accounts  to  reflect  declaration  and
payment of dividends.
         Calvert  Shareholder   Services,   Inc.  ("CSSI"),   4550  Montgomery
Avenue,  Bethesda,  Maryland  20814, a subsidiary of Calvert Group,  Ltd., has
been retained by the Fund to act as shareholder  servicing agent.  Shareholder
servicing  responsibilities  include  responding to shareholder  inquiries and
instructions  concerning their accounts,  entering any telephoned purchases or
redemptions  into the NFDS system,  maintenance  of  broker-dealer  data,  and
preparing  and  distributing   statements  to  shareholders   regarding  their
accounts.  Calvert  Shareholder  Services,  Inc. was the sole  transfer  agent
prior to January 1, 1998.
         For these  services,  NFDS and  Calvert  Shareholder  Services,  Inc.
receive a fee based on the  number of  shareholder  accounts  and  shareholder
transactions, per Portfolio.

INDEPENDENT ACCOUNTANTS AND CUSTODIANS

         PricewaterhouseCoopers   LLP,  250  West  Pratt  Street,   Baltimore,
Maryland  21201,  has  been  selected  by the  Board of  Trustees  to serve as
independent  accountants  for fiscal  year  1999.  State  Street  Bank & Trust
Company,  N.A., 225 Franklin  Street,  Boston,  MA 02110,  currently serves as
custodian of the  Portfolio's  investments.  First  National Bank of Maryland,
25 South Charles  Street,  Baltimore,  Maryland 21203 also serves as custodian
of certain of the Portfolio's cash assets.  Neither  custodian has any part in
deciding  the  Portfolio's  investment  policies  or the choice of  securities
that are to be purchased or sold for the Portfolio.





METHOD OF DISTRIBUTION

         The Portfolios have entered into a principal  underwriting  agreement
with Calvert  Distributors Inc.  ("CDI"),  4550 Montgomery  Avenue,  Bethesda,
Maryland  20814.  Pursuant to the  agreement,  CDI serves as  distributor  and
principal  underwriter for the  Portfolios.  Under the terms of the agreement,
CDI is entitled to receive a service fee and  distribution  fee from the Money
Market Portfolio, paid through the Distribution Plan of Class T.
         Pursuant  to Rule  12b-1  under  the 1940  Act,  Class T of the Money
Market  Portfolio has adopted a  Distribution  Plan (the "Plan") which permits
it to pay certain  expenses  associated with the distribution and servicing of
its shares.  Such expenses may not exceed,  on an annual  basis,  0.25% of the
average daily net assets of Class T.
         The  Distribution  Plan  was  approved  by  the  Board  of  Trustees,
including the Trustees who are not  "interested  persons" of the Fund (as that
term  is  defined  in the  1940  Act)  and  who  have no  direct  or  indirect
financial  interest in the operation of the Plan or in any agreements  related
to the  Plan.  The  selection  and  nomination  of the  Trustees  who  are not
interested  persons  is  committed  to the  discretion  of such  disinterested
Trustees.  In establishing the Plan, the Trustees  considered  various factors
including the amount of the  distribution  expenses.  The Trustees  determined
that there is a reasonable  likelihood  that the Plan will benefit Class T and
its shareholders.
         The  Plan  may  be   terminated   by  vote  of  a  majority   of  the
non-interested  Trustees who have no direct or indirect  financial interest in
the Plan, or by vote of a majority of the  outstanding  shares of the affected
class or  Portfolio.  Any  change in the Plan that would  materially  increase
the  cost  to  the  affected  Class  of  Portfolio  requires  approval  of the
shareholders  of  that  class;  otherwise,  the  Plan  may be  amended  by the
Trustees,  including a majority of the  non-interested  Trustees as  described
above.  The Plan  will  continue  in  effect  for  successive  one-year  terms
provided that such  continuance is specifically  approved by (i) the vote of a
majority  of the  Trustees  who  are not  parties  to the  Plan or  interested
persons  of any  such  party  and who have no  direct  or  indirect  financial
interest in the Plan,  and (ii) the vote of a majority of the entire  Board of
Trustees.
         Apart from the Plan,  the Advisor and CDI, at their own expense,  may
incur costs and pay expenses  associated  with the  distribution  of shares of
the Money Market Portfolio.
         CDI  also  receives  all  sales  charges   imposed  on   Limited-Term
Portfolio  Class A shares  and  compensates  broker-dealer  firms for sales of
shares at a maximum commission rate of 1.00%.
         For the fiscal years ended  December 31, 1996,  1997,  and 1998,  CDI
received  no sales  charges in excess of the dealer  reallowance.  CDI paid to
dealers $48,520,  $101,072,  and $129,017,  in addition to commissions charged
on sales of  Limited-Term  Portfolio,  during  fiscal  years 1996,  1997,  and
1998, respectively.

PORTFOLIO TRANSACTIONS

         Portfolio   transactions   are  undertaken  on  the  basis  of  their
desirability  from an  investment  standpoint.  Investment  decisions  and the
choice  of  brokers  and  dealers  are made by the  Fund's  Advisor  under the
direction and supervision of the Fund's Board of Trustees.
         For  the  fiscal  years  ended   December  31,  1997  and  1998,  the
portfolio  turnover  rates  of the  Limited-Term  Portfolio  were 52% and 45%,
respectively.  Broker-dealers who execute portfolio  transactions on behalf of
Limited-Term  are selected on the basis of their  professional  capability and
the value and quality of their  services.  The Advisor  reserves  the right to
place  orders  for  the  purchase  or  sale  of  portfolio   securities   with
broker-dealers   who  have  sold  shares  of   Limited-Term   or  who  provide
Limited-Term  with statistical,  research,  or other information and services.
Although any statistical  research or other  information and services provided
by  broker-dealers  may be useful to the  Advisor,  the  dollar  value of such
information  and services is generally  indeterminable,  and its  availability
or receipt does not serve to materially  reduce the Advisor's  normal research
activities or expenses.  In fiscal years 1996,  1997, and 1998, no commissions
were paid to any officer,  trustee or Advisory  Council  member of the Fund or
any of their  affiliates.  For the  Limited-Term  Portfolio,  1996,  1997, and
1998,  aggregate  brokerage  commissions paid to broker-dealers  were $48,520,
$0, and $0, respectively.
         The Advisor may also execute  portfolio  transactions with or through
broker-dealers  who have sold  shares of  Limited-Term.  However,  such  sales
will  not  be a  qualifying  or  disqualifying  factor  in  a  broker-dealer's
selection nor will the selection of any  broker-dealer  be based on the volume
of  Limited-Term  shares  sold.  The Advisor may  compensate,  at its expense,
such  broker-dealers in consideration of their promotional and  administrative
services.

                             GENERAL INFORMATION

         The Fund is an open-end  investment  management  investment  company,
organized as a  Massachusetts  business  trust on October 20, 1980.  The Money
Market and Limited Term  Portfolios are  diversified.  The other series of the
Fund include the Long-Term Portfolio,  California Money Market Portfolio,  and
the Vermont Municipal  Portfolio.  The Fund's Declaration of Trust contains an
express  disclaimer of  shareholder  liability for acts or  obligations of the
Fund. The  shareholders  of a  Massachusetts  business  trust might,  however,
under certain  circumstances,  be held  personally  liable as partners for its
obligations.  The  Declaration  of  Trust  provides  for  indemnification  and
reimbursement  of  expenses  out of  Fund  assets  for  any  shareholder  held
personally  liable  for  obligations  of the Fund.  The  Declaration  of Trust
provides that the Fund shall,  upon  request,  assume the defense of any claim
made  against  any  shareholder  for any act or  obligation  of the  Fund  and
satisfy any judgment  thereon.  The Declaration of Trust further provides that
the Fund may maintain  appropriate  insurance (for example,  fidelity  bonding
and  errors and  omissions  insurance)  for the  protection  of the Fund,  its
shareholders,  Trustees,  officers,  employees,  and agents to cover  possible
tort  and  other  liabilities.  Thus,  the  risk  of a  shareholder  incurring
financial   loss  on  account   of   shareholder   liability   is  limited  to
circumstances  in which both inadequate  insurance  exists and the Fund itself
is unable to meet its obligations.
         Each  share  of  each  series   represents  an  equal   proportionate
interest  in that  series  with  each  other  share  and is  entitled  to such
dividends  and  distributions  out of the income  belonging  to such series as
declared by the Board.  The Money Market  Portfolio offers Class O (offered in
the Calvert  Tax-Free  Reserves Money Market  Prospectus),  the  Institutional
Class (offered in a separate  prospectus),  and Class T (offered in a separate
prospectus).
         Each  class   represents   interests   in  the  same   portfolio   of
investments  but,  as  further  described  in the  prospectus,  each  class is
subject to  differing  sales  charges and  expenses,  which  differences  will
result in differing net asset values and  distributions.  Upon any liquidation
of the Fund,  shareholders  of each  class are  entitled  to share pro rata in
the net assets belonging to that series available for distribution.
         The Fund is not  required to hold annual  shareholder  meetings,  but
special  meetings  may  be  called  for  certain  purposes  such  as  electing
Trustees,  changing fundamental  policies, or approving a management contract.
As a  shareholder,  you receive  one vote for each share you own,  except that
matters affecting  classes  differently,  such as Distribution  Plans, will be
voted on separately by the affected class(es).

CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES

         As of April 20, 1999, the following  shareholders  owned of record 5%
or more of the Class or Portfolio shown:

         Name and Address                   % of Ownership

         Minnesota Mining and Mfg. Co.
         St. Paul, Minnesota                15.51%,  Money  Market  Portfolio,
Class I

         The Grocers Supply Co., Inc.
         Houston, Texas                      14.14%,  Money Market  Portfolio,
Class I

         Florida Power & Light Co.
         Miami, Florida                     14.10%,  Money  Market  Portfolio,
Class I

         Mollanvick, Inc.
         Wilmington, Delaware               10.43%,  Money  Market  Portfolio,
Class I

         David Mastran
         Arlington, Virginia                8.42%,   Money  Market  Portfolio,
Class I

         Synopsys, Inc.
         Mountain View, California          7.24%,   Money  Market  Portfolio,
Class I

                                   APPENDIX

Municipal Obligations
         Municipal   obligations  are  debt  obligations   issued  by  states,
cities,  municipalities,  and  their  agencies  to obtain  funds  for  various
public  purposes.  Such purposes  include the  construction of a wide range of
public  facilities,  the refunding of outstanding  obligations,  the obtaining
of funds for  general  operating  expenses,  and the lending of funds to other
public institutions and facilities.  In addition,  certain types of industrial
development  bonds are issued by or on behalf of public  authorities to obtain
funds  for many  types of  local,  privately  operated  facilities.  Such debt
instruments  are  considered  municipal  obligations  if the interest  paid on
them is exempt from  federal  income tax in the opinion of bond counsel to the
issuer.  Although the  interest  paid on the  proceeds  from private  activity
bonds  used  for  the  construction,   equipment,  repair  or  improvement  of
privately  operated  industrial  or commercial  facilities  may be exempt from
federal income tax,  current  federal tax law places  substantial  limitations
on the size of such issues.
         Municipal  obligations  are generally  classified as either  "general
obligation" or "revenue'' bonds.  General  obligation bonds are secured by the
issuer's  pledge of its  faith,  credit and  taxing  power for the  payment of
principal  and interest.  Revenue bonds are payable from the revenues  derived
from a  particular  facility or class of  facilities  or, in some cases,  from
the proceeds of a special excise tax or other  specific  revenue  source,  but
not from the general taxing power.  Tax-exempt  industrial  development  bonds
are in most cases revenue  bonds and do not generally  carry the pledge of the
credit of the issuing  municipality.  There are, of course,  variations in the
security of municipal  obligations,  both within a  particular  classification
and among classifications.
         Municipal  obligations are generally  traded on the basis of a quoted
yield  to  maturity,  and  the  price  of the  security  is  adjusted  so that
relative  to the stated  rate of  interest  it will  return the quoted rate to
the purchaser.
         Short-term  and  limited-term   municipal   obligations  include  Tax
Anticipation  Notes,  Revenue  Anticipation  Notes, Bond  Anticipation  Notes,
Construction   Loan  Notes,  and  Discount  Notes.  The  maturities  of  these
instruments  at the time of issue  generally  will range  between three months
and one year.  Pre-Refunded  Bonds with longer nominal maturities that are due
to be retired  with the  proceeds  of an escrowed  subsequent  issue at a date
within  one  year  and  three  years  of the  time  of  acquisition  are  also
considered short-term and limited-term municipal obligations.

Municipal Bond and Note Ratings
Description  of  Moody's  Investors  Service,  Inc.'s  ratings  of  state  and
municipal notes:
         Moody's  ratings for state and municipal  notes and other  short-term
obligations   are  designated   Moody's   Investment   Grade   ("MIG").   This
distinction is in recognition of the  differences  between  short-term  credit
risk and long-term risk.
         MIG 1:  Notes  bearing  this  designation  are of the  best  quality,
enjoying  strong  protection  from  established  cash flows of funds for their
servicing  or from  established  and  broad-based  access  to the  market  for
refinancing, or both.
         MIG2:  Notes  bearing  this  designation  are of high  quality,  with
margins of protection ample although not so large as in the preceding group.
         MIG3: Notes bearing this designation are of favorable  quality,  with
all security  elements  accounted for but lacking the  undeniable  strength of
the  preceding  grades.  Market  access for  refinancing,  in  particular,  is
likely to be less well established.
         MIG4:  Notes  bearing  this  designation  are  of  adequate  quality,
carrying  specific risk but having  protection  commonly  regarded as required
of an investment security and not distinctly or predominantly speculative.

Description of Moody's  Investors  Service  Inc.'s/Standard & Poor's municipal
bond ratings:
         Aaa/AAA:  Best  quality.  These  bonds carry the  smallest  degree of
investment  risk  and are  generally  referred  to as  "gilt  edge."  Interest
payments are  protected by a large or by an  exceptionally  stable  margin and
principal is secure.  This rating  indicates an extremely  strong  capacity to
pay principal and interest.
         Aa/AA:   Bonds   rated  AA  also   qualify   as   high-quality   debt
obligations.  Capacity to pay  principal  and interest is very strong,  and in
the  majority of instances  they differ from AAA issues only in small  degree.
They are rated lower than the best bonds  because  margins of  protection  may
not be as large as in Aaa securities,  fluctuation of protective  elements may
be of greater  amplitude,  or there may be other  elements  present which make
long-term risks appear somewhat larger than in Aaa securities.
         A/A:  Upper-medium  grade  obligations.  Factors  giving  security to
principal and interest are  considered  adequate,  but elements may be present
which  make the bond  somewhat  more  susceptible  to the  adverse  effects of
circumstances and economic conditions.
         Baa/BBB:   Medium  grade   obligations;   adequate  capacity  to  pay
principal and  interest.  Whereas they normally  exhibit  adequate  protection
parameters,  adverse economic  conditions or changing  circumstances  are more
likely to lead to a  weakened  capacity  to pay  principal  and  interest  for
bonds in this category than for bonds in the A category.
         Ba/BB,  B/B,  Caa/CCC,  Ca/CC:  Debt  rated  in these  categories  is
regarded  as  predominantly  speculative  with  respect  to  capacity  to  pay
interest  and repay  principal.  There  may be some  large  uncertainties  and
major  risk  exposure  to  adverse  conditions.   The  higher  the  degree  of
speculation, the lower the rating.
         C/C: This rating is only for no-interest income bonds.
         D: Debt in  default;  payment  of  interest  and/or  principal  is in
arrears.



                               LETTER OF INTENT

                           
Date

Calvert Distributors, Inc.
4550 Montgomery Avenue
Bethesda, MD 20814

Ladies and Gentlemen:

         By signing this Letter of Intent, or affirmatively marking the
Letter of Intent option on my Fund Account Application Form, I agree to be
bound by the terms and conditions applicable to Letters of Intent appearing
in the Prospectus and the Statement of Additional Information for the Fund
and the provisions described below as they may be amended from time to time
by the Fund. Such amendments will apply automatically to existing Letters of
Intent.

         I intend to invest in the shares of:_____________________
(Fund or Portfolio name) during the thirteen (13) month period from the date
of my first purchase pursuant to this Letter (which cannot be more than
ninety (90) days prior to the date of this Letter or my Fund Account
Application Form, whichever is applicable), an aggregate amount (excluding
any reinvestments of distributions) of at least fifty thousand dollars
($50,000) which, together with my current holdings of the Fund (at public
offering price on date of this Letter or my Fund Account Application Form,
whichever is applicable), will equal or exceed the amount checked below:

         __ $50,000 __ $100,000 __ $250,000 __ $500,000 __ $1,000,000

         Subject to the conditions specified below, including the terms of
escrow, to which I hereby agree, each purchase occurring after the date of
this Letter will be made at the public offering price applicable to a single
transaction of the dollar amount specified above, as described in the Fund's
prospectus. "Fund" in this Letter of Intent shall refer to the Fund or
Portfolio, as the case may be. No portion of the sales charge imposed on
purchases made prior to the date of this Letter will be refunded.

         I am making no commitment to purchase shares, but if my purchases
within thirteen months from the date of my first purchase do not aggregate
the minimum amount specified above, I will pay the increased amount of sales
charges prescribed in the terms of escrow described below. I understand that
4.75% of the minimum dollar amount specified above will be held in escrow in
the form of shares (computed to the nearest full share). These shares will
be held subject to the terms of escrow described below.

         From the initial purchase (or subsequent purchases if necessary),
4.75% of the dollar amount specified in this Letter shall be held in escrow
in shares of the Fund by the Fund's transfer agent. For example, if the
minimum amount specified under the Letter is $50,000, the escrow shall be
shares valued in the amount of $2,375 (computed at the public offering price
adjusted for a $50,000 purchase). All dividends and any capital gains
distribution on the escrowed shares will be credited to my account.

         If the total minimum investment specified under the Letter is
completed within a thirteen month period, escrowed shares will be promptly
released to me. However, shares disposed of prior to completion of the
purchase requirement under the Letter will be deducted from the amount
required to complete the investment commitment.

         Upon expiration of this Letter, the total purchases pursuant to the
Letter are less than the amount specified in the Letter as the intended
aggregate purchases, Calvert Distributors, Inc. ("CDI") will bill me for an
amount equal to the difference between the lower load I paid and the dollar
amount of sales charges which I would have paid if the total amount
purchased had been made at a single time. If not paid by the investor within
20 days, CDI will debit the difference from my account. Full shares, if any,
remaining in escrow after the aforementioned adjustment will be released
and, upon request, remitted to me.

         I irrevocably constitute and appoint CDI as my attorney-in-fact,
with full power of substitution, to surrender for redemption any or all
escrowed shares on the books of the Fund. This power of attorney is coupled
with an interest.

         The commission allowed by CDI to the broker-dealer named herein
shall be at the rate applicable to the minimum amount of my specified
intended purchases.

         The Letter may be revised upward by me at any time during the
thirteen-month period, and such a revision will be treated as a new Letter,
except that the thirteen-month period during which the purchase must be made
will remain unchanged and there will be no retroactive reduction of the
sales charges paid on prior purchases.

         In determining the total amount of purchases made hereunder, shares
disposed of prior to termination of this Letter will be deducted. My
broker-dealer shall refer to this Letter of Intent in placing any future
purchase orders for me while this Letter is in effect.


                                                     
Dealer

                                                     
Name of Investor(s)

By                                                   
     Authorized Signer

                                                     
Address

                                                     
Signature of Investor(s)

                                                     
Date

                                                     
Signature of Investor(s)

                                                     
Date

<PAGE>
CALVERT TAX-FREE RESERVES
Long-Term Portfolio
4550 Montgomery Avenue, Bethesda, Maryland 20814

Statement of Additional Information
April 30, 1999

TABLE OF CONTENTS

Investment Policies                                            1
Investment Restrictions                                        8
Purchases and Redemptions of Shares                            9
Dividends, Distributions and Tax Matters                       9
Valuation of Shares                                           10
Calculation of Yield and Total Return                         10
Advertising                                                   11
Trustees and Officers                                         12
Investment Advisor                                            14
Administrative Services                                       15
Transfer and Shareholder Servicing Agents                     15
Independent Accountants and Custodians                        15
Method of Distribution                                        15
Portfolio Transactions                                        16
General Information                                           17
Control Persons and Principal Holders of Securities           17
Appendix                                                      17

New Account Information
         (800) 368-2748
         (301) 951-4820

Shareholder Services
         (800) 368-2745

Broker Services
         (800) 368-2746
         (301) 951-4850

TDD for the Hearing- Impaired
         (800) 541-1524

         This  Statement  of  Additional  Information  is  not  a  prospectus.
Investors  should read the Statement of Additional  Information in conjunction
with the Portfolio's  Prospectus,  dated April 30, 1999, which may be obtained
free of charge  by  writing  the Fund at the  above  address  or  calling  the
telephone numbers listed above.

         The audited  financial  statements in the  Portfolio's  Annual Report
to  Shareholders  dated  December  31, 1998,  are  expressly  incorporated  by
reference  and made a part of this  Statement  of  Additional  Information.  A
copy of the  Annual  Report  may be  obtained  free of  charge by  writing  or
calling the Portfolio.

INVESTMENT POLICIES

         The  Portfolio   invests   primarily  in  a  portfolio  of  municipal
obligations  whose  interest is exempt from federal income tax. The investment
objective  may  only  be  changed  with  shareholder   approval.   A  complete
explanation  of municipal  obligations  and municipal bond and note ratings is
set forth in the Appendix.
         The credit  rating of the  Portfolio's  assets as of its most  recent
fiscal  year-end  appears in the Annual Report to  Shareholders,  incorporated
by reference herein.

Variable Rate Obligations and Demand Notes
         The  Portfolio  may invest in  variable  rate  obligations.  Variable
rate obligations have a yield that is adjusted  periodically  based on changes
in the level of prevailing  interest rates.  Floating rate obligations have an
interest rate fixed to a known lending rate,  such as the prime rate,  and are
automatically   adjusted   when  the  known  rate   changes.   Variable   rate
obligations lessen the capital  fluctuations  usually inherent in fixed income
investments.  This  diminishes the risk of capital  depreciation of investment
securities in a Portfolio and,  consequently,  of Portfolio  shares.  However,
if interest rates decline,  the yield of the invested  Portfolio will decline,
causing the  Portfolio  and its  shareholders  to forego the  opportunity  for
capital appreciation of the Portfolio's investments and of their shares.
         The  Portfolio  may invest in floating  rate and variable rate demand
notes.  Demand notes  provide  that the holder may demand  payment of the note
at its par value plus  accrued  interest by giving  notice to the  issuer.  To
ensure the ability of the issuer to make  payment on demand,  a bank letter of
credit or other liquidity facility may support the note.
         The Board of  Trustees  has  approved  investments  in  floating  and
variable  rate demand notes upon the following  conditions:  the Portfolio has
right of demand,  upon notice not to exceed  thirty  days,  against the issuer
to  receive  payment;  the  issuer  will be able to  make  payment  upon  such
demand,  either from its own  resources or through an  unqualified  commitment
from a third party;  and the rate of interest  payable is calculated to ensure
that  the  market  value  of such  notes  will  approximate  par  value on the
adjustment  dates.  The remaining  maturity of such demand notes is deemed the
period  remaining  until such time as the  Portfolio can recover the principal
through demand.

Municipal Leases
         The  Portfolio  may  invest  in  municipal   leases,   or  structured
instruments  where the underlying  security is a municipal  lease. A municipal
lease  is  an  obligation  of a  government  or  governmental  authority,  not
subject to voter  approval,  used to finance  capital  projects  or  equipment
acquisitions and payable through  periodic rental payments.  The Portfolio may
purchase  unrated leases.  There are additional risks inherent in investing in
this type of municipal  security.  Unlike  municipal notes and bonds,  where a
municipality  is obligated  by law to make  interest  and  principal  payments
when due,  funding for lease  payments  needs to be  appropriated  each fiscal
year in the budget.  It is possible that a municipality  will not  appropriate
funds for lease  payments.  The Advisor  considers risk of cancellation in its
investment  analysis.  The Fund's Advisor,  under the supervision of the Board
of  Trustees/Directors,  is responsible  for determining the credit quality of
such leases on an ongoing  basis,  including an assessment  of the  likelihood
that  the  lease  will  not  be  canceled.  Certain  municipal  leases  may be
considered   illiquid  and  subject  to  the  Portfolio's  limit  on  illiquid
securities.  The Board of  Trustees/Directors  has  directed  the  Advisor  to
treat a municipal  lease as a liquid  security if it satisfies  the  following
conditions:  (A)  such  treatment  must be  consistent  with  the  Portfolio's
investment  restrictions;  (B) the Advisor should be able to conclude that the
obligation  will maintain its liquidity  throughout the time it is held by the
Portfolio,  based on the  following  factors:  (1)  whether  the  lease may be
terminated by the lessee; (2) the potential  recovery,  if any, from a sale of
the leased property upon  termination of the lease;  (3) the lessee's  general
credit  strength  (e.g.,  its debt,  administrative,  economic  and  financial
characteristics  and  prospects);  (4) the  likelihood  that the  lessee  will
discontinue   appropriating  funding  for  the  leased  property  because  the
property  is  no  longer  deemed  essential  to  its  operations   (e.g.,  the
potential   for  an  "event  of   nonappropriation"),   and  (5)  any   credit
enhancement or legal recourse  provided upon an event of  nonappropriation  or
other  termination of the lease; and (C) the Advisor should determine  whether
the  obligation  can be disposed of within seven days in the  ordinary  course
of business at  approximately  the amount at which the Portfolio has valued it
for purposes of  calculating  the  Portfolio's  net asset  value,  taking into
account the following  factors:  (1) the  frequency of trades and quotes;  (2)
the  volatility  of  quotations  and trade  prices;  (3) the number of dealers
willing  to  purchase  or sell  the  security  and  the  number  of  potential
purchasers;  (4) dealer  undertakings  to make a market in the  security;  (5)
the nature of the security  and the nature of the  marketplace  trades  (e.g.,
the time needed to dispose of the security,  the method of soliciting  offers,
and the  mechanics  of the  transfer);  (6) the rating of the security and the
financial  condition  and  prospects  of the  issuer;  and (7)  other  factors
relevant to the Portfolio's ability to dispose of the security.

Obligations with Puts Attached
         The Portfolio  has authority to purchase  securities at a price which
would result in a yield to maturity lower than that  generally  offered by the
seller  at the time of  purchase  when it can  acquire  at the  same  time the
right to sell the  securities  back to the  seller at an agreed  upon price at
any  time  during  a  stated  period  or on a  certain  date.  Such a right is
generally denoted as a "put."  Unconditional  puts are readily  exercisable in
the event of a default in payment of principal  or interest on the  underlying
securities.

Temporary Investments
         Short-term money market type investments  consist of:  obligations of
the U.S.  Government,  its agencies  and  instrumentalities;  certificates  of
deposit  of banks  with  assets of one  billion  dollars  or more;  commercial
paper or other  corporate notes of investment  grade quality;  and any of such
items subject to short-term repurchase agreements.
         The   Portfolio   intends  to   minimize   taxable   income   through
investment,  when possible, in short-term tax-exempt  securities.  To minimize
taxable income, the Portfolio may also hold cash which is not earning income.

Repurchase Agreements
         The  Portfolio  may purchase  debt  securities  subject to repurchase
agreements,   which  are  arrangements   under  which  the  Portfolio  buys  a
security,  and the seller  simultaneously agrees to repurchase the security at
a  specified  time  and  price  reflecting  a  market  rate of  interest.  The
Portfolio  engages in repurchase  agreements in order to earn a higher rate of
return than it could earn simply by investing in the  obligation  which is the
subject of the repurchase  agreement.  Repurchase agreements are not, however,
without  risk.  In the event of the  bankruptcy of a seller during the term of
a repurchase  agreement,  a legal question  exists as to whether the Portfolio
would be deemed the owner of the  underlying  security or would be deemed only
to have a security  interest  in and lien upon such  security.  The  Portfolio
will only engage in repurchase  agreements with recognized  securities dealers
and banks  determined to present  minimal credit risk by the Advisor under the
direction and supervision of the Portfolio's  Board of Trustees.  In addition,
the Portfolio will only engage in repurchase  agreements  reasonably  designed
to secure fully during the term of the  agreement  the seller's  obligation to
repurchase  the  underlying  security and will monitor the market value of the
underlying  security  during  the term of the  agreement.  If the value of the
underlying  security  declines  and is not at least  equal  to the  repurchase
price  due  the  Portfolio  pursuant  to the  agreement,  the  Portfolio  will
require  the  seller to pledge  additional  securities  or cash to secure  the
seller's  obligations  pursuant to the  agreement.  If the seller  defaults on
its  obligation  to  repurchase  and  the  value  of the  underlying  security
declines,  the  Portfolio  may incur a loss and may incur  expenses in selling
the  underlying  security.  Repurchase  agreements  are always for  periods of
less than one year.  Repurchase  agreements not  terminable  within seven days
are considered illiquid.

Reverse Repurchase Agreements
         The  Portfolio  may also  engage in  reverse  repurchase  agreements.
Under a reverse  repurchase  agreement,  the Portfolio  sells  securities to a
bank or  securities  dealer and agrees to  repurchase  those  securities  from
such  party at an  agreed  upon  date and price  reflecting  a market  rate of
interest.  The  Portfolio  invests the proceeds  from each reverse  repurchase
agreement in  obligations  in which it is authorized to invest.  The Portfolio
intends to enter into a reverse  repurchase  agreement  only when the interest
income  provided  for in the  obligation  in which the  Portfolio  invests the
proceeds is expected to exceed the amount the  Portfolio  will pay in interest
to the  other  party to the  agreement  plus  all  costs  associated  with the
transactions.  The Portfolio does not intend to borrow for leverage  purposes.
The  Portfolio  will  only  be  permitted  to  pledge  assets  to  the  extent
necessary to secure borrowings and reverse repurchase agreements.
         During the time a reverse  repurchase  agreement is outstanding,  the
Portfolio  will  maintain  in a  segregated  account  an  amount  of cash,  US
Government  securities or other liquid,  high-quality debt securities equal in
value to the  repurchase  price.  The Portfolio  will mark to market the value
of assets held in the segregated  account,  and will place  additional  assets
in the  account  whenever  the  total  value of the  account  falls  below the
amount required under applicable regulations.
         The Portfolio's  use of reverse  repurchase  agreements  involves the
risk  that  the  other  party  to  the  agreements  could  become  subject  to
bankruptcy or  liquidation  proceedings  during the period the  agreements are
outstanding.  In such event,  the Portfolio may not be able to repurchase  the
securities it has sold to that other party. Under those  circumstances,  if at
the  expiration of the  agreement  such  securities  are of greater value than
the proceeds  obtained by the Portfolio  under the  agreements,  the Portfolio
may have been better off had it not entered into the agreement.  However,  the
Portfolio will enter into reverse  repurchase  agreements  only with banks and
dealers  which  the  Advisor  believes  present  minimal  credit  risks  under
guidelines  adopted by the  Portfolio's  Board of Trustees.  In addition,  the
Portfolio  bears the risk that the market value of the  securities it sold may
decline below the agreed-upon  repurchase  price, in which case the dealer may
request the Portfolio to post additional collateral.

When-Issued Purchases
         New issues of  municipal  obligations  are  offered on a  when-issued
basis;  that is,  delivery and payment for the securities  normally take place
15 to 45 days after the date of the  transaction.  The payment  obligation and
the yield that will be received on the  securities  are each fixed at the time
the  buyer  enters  into  the   commitment.   The  Portfolio  will  only  make
commitments  to  purchase  these  securities  with the  intention  of actually
acquiring  them, but may sell these  securities  before the settlement date if
it is deemed advisable as a matter of investment strategy.
         Securities  purchased on a when-issued  basis and the securities held
in the  Portfolio  are  subject  to  changes  in market  value  based upon the
public's  perception of the  creditworthiness of the issuer and changes in the
level of interest  rates  (which  will  generally  result in both  changing in
value in the same way,  i.e.,  both  experiencing  appreciation  when interest
rates decline and  depreciation  when interest rates rise).  Therefore,  if in
order to achieve higher interest income,  the Portfolio remains  substantially
fully  invested  at the  same  time  that  it has  purchased  securities  on a
when-issued basis,  there will be a greater  possibility that the market value
of the Portfolio's assets may vary.
         When  the  time  comes  to  pay  for  when-issued   securities,   the
Portfolio will meet its  obligations  from then  available cash flow,  sale of
securities  or,  although it would not normally  expect to do so, from sale of
the when-issued  securities  themselves (which may have a market value greater
or less than the Portfolio's payment  obligation).  Sale of securities to meet
such  obligations  carries with it a greater  potential for the realization of
capital  losses and capital  gains which are not exempt  from  federal  income
tax.  When issued  securities  do not earn income until they have in fact been
issued.
         When  the  Portfolio  purchases  a  when-issued   security,  it  will
maintain an amount of cash, cash  equivalents  (for example,  commercial paper
and daily  tender  adjustable  notes) or  short-term  high-grade  fixed income
securities  in a segregated  account so that the amount so  segregated  equals
the  market  value  of  the  when-issued   purchase,   thereby   ensuring  the
transaction is unleveraged.



Non-Investment Grade Debt Securities
         Non-investment   grade  debt   securities   are  lower  quality  debt
securities  (generally  those  rated  BB or  lower  by S&P or Ba or  lower  by
Moody's,  known  as "junk  bonds."  These  securities  have  moderate  to poor
protection   of  principal   and  interest   payments  and  have   speculative
characteristics.  (See  Appendix  for a  description  of the  ratings.)  These
securities  involve  greater risk of default or price  declines due to changes
in  the  issuer's  creditworthiness  than  investment-grade  debt  securities.
Because the market for  lower-rated  securities may be thinner and less active
than for  higher-rated  securities,  there may be market price  volatility for
these  securities and limited  liquidity in the resale  market.  Market prices
for  these  securities  may  decline   significantly  in  periods  of  general
economic difficulty or rising interest rates.
         The  quality  limitation  set  forth  in the  Portfolio's  investment
policy is  determined  immediately  after  the  Portfolio's  acquisition  of a
given  security.  Accordingly,  any  later  change  in  ratings  will  not  be
considered  when   determining   whether  an  investment   complies  with  the
Portfolio's investment policy.
         When  purchasing  non-investment  grade  debt  securities,  rated  or
unrated,  the Advisor  prepares its own careful credit  analysis to attempt to
identify  those issuers whose  financial  condition is adequate to meet future
obligations  or is expected to be  adequate in the future.  Through  portfolio
diversification   and  credit  analysis,   investment  risk  can  be  reduced,
although there can be no assurance that losses will not occur.

Derivatives
         The Portfolio can use various techniques to increase or decrease
its exposure to changing security prices, interest rates, or other factors
that affect security values. These techniques may involve derivative
transactions such as buying and selling options and futures contracts and
leveraged notes, entering into swap agreements, and purchasing indexed
securities. The Portfolio can use these practices either as substitution or
as protection against an adverse move in the Portfolio to adjust the risk
and return characteristics of the Portfolio. If the Advisor judges market
conditions incorrectly or employs a strategy that does not correlate well
with a Portfolio's investments, or if the counterparty to the transaction
does not perform as promised, these techniques could result in a loss. These
techniques may increase the volatility of a Portfolio and may involve a
small investment of cash relative to the magnitude of the risk assumed.
Derivatives are often illiquid.

Options and Futures Contracts
         The  Portfolio   may,  in  pursuit  of  its   respective   investment
objectives,  purchase  put and call  options  and  engage  in the  writing  of
covered  call  options  and secured  put  options on  securities  and employ a
variety  of  other  investment   techniques  such  as  interest  rate  futures
contracts, and options on such futures, as described more fully below.
         The  Portfolio  may  engage  in such  transactions  only to hedge the
existing   positions  in  the   Portfolio.   They  will  not  engage  in  such
transactions  for the purposes of  speculation  or leverage.  Such  investment
policies  and  techniques  may  involve  a greater  degree of risk than  those
inherent in more conservative investment approaches.
         The Portfolio may write  "covered  options" on securities in standard
contracts  traded on national  securities  exchanges.  The Portfolio may write
such  options in order to receive the  premiums  from  options that expire and
to seek net gains from  closing  purchase  transactions  with  respect to such
options.

Put and Call Options.  The  Portfolio  may purchase put and call  options,  in
standard  contracts  traded on national  securities  exchanges.  The Portfolio
will  purchase  such  options  only to hedge  against  changes in the value of
securities  the  Portfolio  hold and not for the  purposes of  speculation  or
leverage.  By buying a put, a Portfolio  has the right to sell the security at
the exercise  price,  thus  limiting its risk of loss through a decline in the
market  value  of the  security  until  the put  expires.  The  amount  of any
appreciation  in the  value  of the  underlying  security  will  be  partially
offset by the amount of the  premium  paid for the put option and any  related
transaction  costs.  Prior to its  expiration,  a put  option may be sold in a
closing sale  transaction  and any profit or loss from the sale will depend on
whether  the amount  received  is more or less than the  premium  paid for the
put option plus the related transaction costs.
         The Portfolio  may purchase  call options on securities  which it may
intend to purchase or as an interest  rate  hedge.  Such  transactions  may be
entered  into in order to limit  the  risk of a  substantial  increase  in the
market price of the  security  which the  Portfolio  intends to purchase or in
the level of market  interest rates.  Prior to its  expiration,  a call option
may be sold in a  closing  sale  transaction.  Any  profit or loss from such a
sale will  depend on  whether  the  amount  received  is more or less than the
premium paid for the call option plus the related transaction costs.

Covered  Options.  The Portfolio may write only covered  options on securities
in standard  contracts  traded on national  securities  exchanges.  This means
that,  in the case of call  options,  so long as a Portfolio  is  obligated as
the writer of a call option,  that Portfolio will own the underlying  security
subject to the option and, in the case of put options,  that  Portfolio  will,
through its custodian,  deposit and maintain  either cash or securities with a
market value equal to or greater than the exercise price of the option.
         When a Portfolio  writes a covered call option,  the Portfolio  gives
the  purchaser  the right to purchase the security at the call option price at
any time  during  the life of the  option.  As the writer of the  option,  the
Portfolio  receives a premium,  less a  commission,  and in exchange  foregoes
the  opportunity  to  profit  from any  increase  in the  market  value of the
security  exceeding the call option price.  The premium serves to mitigate the
effect  of any  depreciation  in the  market  value of the  security.  Writing
covered  call  options  can  increase  the  income of the  Portfolio  and thus
reduce  declines  in the  net  asset  value  per  share  of the  Portfolio  if
securities  covered  by such  options  decline  in value.  Exercise  of a call
option by the  purchaser  however will cause the  Portfolio  to forego  future
appreciation of the securities covered by the option.
         When a Portfolio  writes a covered put option,  it will gain a profit
in the amount of the premium,  less a commission,  so long as the price of the
underlying security remains above the exercise price.  However,  the Portfolio
remains  obligated to purchase the  underlying  security from the buyer of the
put option  (usually  in the event the price of the  security  falls below the
exercise  price) at any time  during  the option  period.  If the price of the
underlying  security  falls  below  the  exercise  price,  the  Portfolio  may
realize a loss in the amount of the  difference  between  the  exercise  price
and the sale price of the security, less the premium received.
         The  Portfolio  may  purchase  securities  which may be covered  with
call  options  solely  on the  basis  of  considerations  consistent  with the
investment   objectives  and  policies  of  the  Portfolio.   The  Portfolio's
turnover  may  increase  through  the  exercise  of a call  option;  this will
generally  occur if the market  value of a "covered"  security  increases  and
the portfolio has not entered into a closing purchase transaction.
         Risks  Related to Options  Transactions.  The Portfolio can close out
its  respective  positions  in  exchange-traded  options  only on an  exchange
which  provides a secondary  market in such  options.  Although the  Portfolio
intends to acquire  and write only such  exchange-traded  options for which an
active  secondary  market  appears to exist,  there can be no  assurance  that
such  a  market  will  exist  for  any  particular   option  contract  at  any
particular  time.  This might  prevent the  Portfolio  from closing an options
position,  which could impair the  Portfolio's  ability to hedge  effectively.
The  inability  to close out a call  position  may have an  adverse  effect on
liquidity  because  the  Portfolio  may be  required  to hold  the  securities
underlying the option until the option expires or is exercised.

Types of Futures Contracts Purchased
         The Long-Term  Portfolio  intends to deal in futures  contracts based
upon The Bond Buyer  Municipal  Bond Index,  a  price-weighted  measure of the
market value of 40 large,  recently-issued  tax-exempt bonds, and to engage in
transactions in exchange-listed  futures contracts on US Treasury  securities.
The  Long-Term  Portfolio  may also engage in  transactions  in other  futures
contracts,  such as futures  contracts  on other  municipal  bond indexes that
become available,  if the investment  advisor believes such contracts would be
appropriate for hedging its investments in municipal bonds.

Transactions in Futures Contracts
         The  Portfolio  may  engage  in the  purchase  and  sale  of  futures
contracts on an index of municipal bonds or on U.S.  Treasury  securities,  or
options on such futures  contracts,  for hedging  purposes only. The Portfolio
may sell such futures  contracts in  anticipation  of a decline in the cost of
municipal   bonds  it  holds  or  may  purchase  such  futures   contracts  in
anticipation  of an increase  in the value of  municipal  bonds the  Portfolio
intends to acquire.  The  Portfolio  also is  authorized  to purchase and sell
other  financial  futures  contracts  which in the  opinion of the  Investment
Advisor  provide  an  appropriate  hedge  for  some or all of the  Portfolio's
securities.
         Because of low  initial  margin  deposits  made upon the opening of a
futures position,  futures  transactions  involve substantial  leverage.  As a
result,  relatively  small movements in the price of the futures  contract can
result in substantial  unrealized gains or losses.  Because the Portfolio will
engage in the  purchase  and sale of financial  futures  contracts  solely for
hedging  purposes,  however,  any  losses  incurred  in  connection  therewith
should,  if the hedging strategy is successful,  be offset in whole or in part
by increases  in the value of  securities  held by the  Portfolio or decreases
in the price of securities the Portfolio intends to acquire.
         Municipal  bond index  futures  contracts  commenced  trading in June
1985,  and it is possible that trading in such futures  contracts will be less
liquid  than  that  in  other  futures  contracts.   The  trading  of  futures
contracts  and options  thereon is subject to certain  market  risks,  such as
trading halts,  suspensions,  exchange or clearing house  equipment  failures,
government  intervention  or other  disruptions  of normal  trading  activity,
which could at times make it difficult  or  impossible  to liquidate  existing
positions.
         The  liquidity  of a  secondary  market in futures  contracts  may be
further  adversely  affected by "daily price fluctuation  limits"  established
by contract  markets,  which limit the amount of fluctuation in the price of a
futures  contract or option  thereon  during a single  trading  day.  Once the
daily limit has been  reached in the  contract,  no trades may be entered into
at a  price  beyond  the  limit,  thus  preventing  the  liquidation  of  open
positions.  Prices  of  existing  contracts  have in the past  moved the daily
limit on a number of  consecutive  trading days. The Portfolio will enter into
a futures position only if, in the judgment of the Investment  Advisor,  there
appears to be an actively traded secondary market for such futures contracts.
         The successful use of transactions  in futures  contracts and options
thereon  depends  on  the  ability  of the  Investment  Advisor  to  correctly
forecast the  direction  and extent of price  movements of these  instruments,
as well as price  movements of the securities  held by the Portfolio  within a
given time frame.  To the extent these prices  remain stable during the period
in which a futures or option  contract is held by the Portfolio,  or move in a
direction  opposite to that  anticipated,  the Portfolio may realize a loss on
the  hedging  transaction  which  is  not  fully  or  partially  offset  by an
increase  in the  value  of  the  Portfolio's  securities.  As a  result,  the
Portfolio's  total  return  for  such  period  may be less  than if it had not
engaged in the hedging transaction.

Description of Financial Futures Contracts
         Futures  Contracts.  A futures  contract  obligates  the  seller of a
contract to deliver and the  purchaser  of a contract to take  delivery of the
type  of  financial  instrument  called  for  in  the  contract  or,  in  some
instances,  to  make a cash  settlement,  at a  specified  future  time  for a
specified  price.  Although the terms of a contract  call for actual  delivery
or  acceptance  of  securities,  or for a cash  settlement,  in most cases the
contracts  are closed out before the  delivery  date  without the  delivery or
acceptance  taking  place.  The  Portfolio  intends  to close out its  futures
contracts prior to the delivery date of such contracts.
         The  Portfolio  may  sell  futures  contracts  in  anticipation  of a
decline  in  the  value  of its  investments  in  municipal  bonds.  The  loss
associated  with any such decline could be reduced without  employing  futures
as a  hedge  by  selling  long-term  securities  and  either  reinvesting  the
proceeds in securities  with shorter  maturities or by holding assets in cash.
This strategy,  however,  entails  increased  transaction costs in the form of
brokerage  commissions  and  dealer  spreads  and will  typically  reduce  the
Portfolio's average yields as a result of the shortening of maturities.
         The  purchase  or  sale  of  a  futures  contract  differs  from  the
purchase  or  sale of a  security,  in that no  price  or  premium  is paid or
received.  Instead,  an  amount  of  cash  or  securities  acceptable  to  the
Portfolio's  futures  commission  merchant and the relevant  contract  market,
which varies but is generally  about 5% or less of the contract  amount,  must
be deposited  with the broker.  This amount is known as "initial  margin," and
represents  a "good  faith"  deposit  assuring  the  performance  of both  the
purchaser and the seller under the futures  contract.  Subsequent  payments to
and from the broker,  known as "variation  margin," are required to be made on
a daily  basis as the price of the  futures  contract  fluctuates,  making the
long or short  positions  in the futures  contract  more or less  valuable,  a
process  known as "marking to the  market."  Prior to the  settlement  date of
the futures  contract,  the  position  may be closed out by taking an opposite
position  which  will  operate  to  terminate  the  position  in  the  futures
contract.  A final determination of variation margin is then made,  additional
cash is required to be paid to or  released by the broker,  and the  purchaser
realizes a loss or gain. In addition,  a commission is paid on each  completed
purchase and sale transaction.
         The sale of  financial  futures  contracts  provides  an  alternative
means  of  hedging  the  Portfolio  against  declines  in  the  value  of  its
investments  in  municipal  bonds.  As such values  decline,  the value of the
Portfolio's  position in the futures  contracts  will tend to  increase,  thus
offsetting  all or a portion of the  depreciation  in the market  value of the
Portfolio's  fixed  income  investments  which  are  being  hedged.  While the
Portfolio  will incur  commission  expenses  in  establishing  and closing out
futures  positions,  commissions on futures  transactions may be significantly
lower  than  transaction  costs  incurred  in the  purchase  and sale of fixed
income securities.  In addition,  the ability of the Portfolio to trade in the
standardized  contracts  available  in the  futures  market  may  offer a more
effective  hedging  strategy than a program to reduce the average  maturing of
portfolio  securities,  due to the  unique and  varied  credit  and  technical
characteristics   of  the  municipal   debt   instruments   available  to  the
Portfolio.  Employing  futures  as a hedge may also  permit the  Portfolio  to
assume a  hedging  posture  without  reducing  the  yield on its  investments,
beyond any amounts required to engage in futures trading.
         The  Portfolio  may  engage  in the  purchase  and  sale  of  futures
contracts on an index of municipal  securities.  These instruments provide for
the  purchase or sale of a  hypothetical  portfolio  of  municipal  bonds at a
fixed price in a stated delivery month.  Unlike most other futures  contracts,
however,  a municipal  bond index  futures  contract  does not require  actual
delivery  of  securities  but  results  in a cash  settlement  based  upon the
difference  in value of the index  between the time the  contract  was entered
into and the time it is liquidated.
         The municipal bond index  underlying the futures  contracts traded by
the Portfolio is The Bond Buyer  Municipal  Bond Index,  developed by The Bond
Buyer and the Chicago  Board of Trade  ("CBT"),  the contract  market on which
the  futures  contracts  are traded.  As  currently  structured,  the index is
comprised  of 40  tax-exempt  term  municipal  revenue and general  obligation
bonds.  Each bond  included in the index must be rated  either A- or higher by
Standard & Poor's or A or higher by Moody's  Investors  Service  and must have
a  remaining  maturity  of  19  years  or  more.  Twice  a  month  new  issues
satisfying the eligibility  requirements  are added to, and an equal number of
old  issues  will be  deleted  from,  the  index.  The  value of the  index is
computed  daily  according  to a formula  based upon the price of each bond in
the index, as evaluated by four dealer-to-dealers brokers.
         The Portfolio  may also  purchase and sell futures  contracts on U.S.
Treasury bills,  notes and bonds for the same types of hedging purposes.  Such
futures  contracts  provide  for  delivery  of the  underlying  security  at a
specified  future  time  for a fixed  price,  and  the  value  of the  futures
contract therefore generally fluctuates with movements in interest rates.
         The  municipal  bond index  futures  contract,  futures  contracts on
U.S.  Treasury  securities and options on such futures contracts are traded on
the CBT, which,  like other contract  markets,  assures the performance of the
parties to each futures contract through a clearing  corporation,  a nonprofit
organization  managed by the exchange  membership,  which is also  responsible
for handling daily accounting of deposits or withdrawals of margin.
         The Portfolio may also purchase  financial  futures contracts when it
is not fully  invested in municipal  bonds in  anticipation  of an increase in
the cost of securities the Portfolio  intends to purchase.  As such securities
are purchased,  an equivalent  amount of futures contracts will be closed out.
In a substantial  majority of these transactions,  the Portfolio will purchase
municipal  bonds upon  termination of the futures  contracts.  Due to changing
market  conditions and interest rate forecasts,  however,  a futures  position
may  be   terminated   without  a   corresponding   purchase  of   securities.
Nevertheless,  all  purchases of futures  contracts by the  Portfolio  will be
subject to certain restrictions, described below.
         Options  on  Futures  Contracts.  An  option  on a  futures  contract
provides the purchaser with the right,  but not the obligation,  to enter into
a long position in the  underlying  futures  contract  (that is,  purchase the
futures  contract),  in the case of a "call" option, or a short position (sell
the futures  contract),  in the case of a "put"  option,  for a fixed price up
to a stated  expiration  date.  The option is purchased  for a  non-refundable
fee,  known as the  "premium."  Upon  exercise  of the  option,  the  contract
market  clearing  house assigns each party to the option an opposite  position
in the underlying futures contract. In the event of exercise,  therefore,  the
parties  are subject to all of the risks of futures  trading,  such as payment
of initial and  variation  margin.  In addition,  the seller,  or "writer," of
the option is subject to margin  requirements on the option position.  Options
on  futures  contracts  are  traded  on  the  same  contract  markets  as  the
underlying futures contracts.
         The  Portfolio  may  purchase  options on futures  contracts  for the
same types of hedging  purposes  described  above in  connection  with futures
contracts.  For example,  in order to protect  against an anticipated  decline
in the  value of  securities  it  holds,  the  Portfolio  could  purchase  put
options  on futures  contracts,  instead of  selling  the  underlying  futures
contracts.  Conversely,  in order to protect  against the  adverse  effects of
anticipated  increases  in  the  costs  of  securities  to  be  acquired,  the
Portfolio  could  purchase  call  options  on  futures  contracts,  instead of
purchasing  the underlying  futures  contracts.  The Portfolio  generally will
sell options on futures contracts only to close out an existing position.
         The Portfolio  will not engage in  transactions  in such  instruments
unless and until the  Investment  Advisor  determines  that market  conditions
and the  circumstances  of the Portfolio  warrant such trading.  To the extent
the  Portfolio  engages  in the  purchase  and sale of  futures  contracts  or
options  thereon,  it will do so only at a level  which is  reflective  of the
Investment  Advisor's  view  of  the  hedging  needs  of  the  Portfolio,  the
liquidity   of  the  market  for  futures   contracts   and  the   anticipated
correlation  between  movements in the value of the futures or option contract
and the value of securities held by the Portfolio.
         Restrictions  on the Use of Futures  Contracts and Options on Futures
Contracts.  Under  regulations  of the Commodity  Futures  Trading  Commission
("CFTC"),  the futures trading activities  described herein will not result in
the  Portfolio  being deemed to be a "commodity  pool," as defined  under such
regulations,  provided that certain  trading  restrictions  are adhered to. In
particular,  CFTC  regulations  require that all futures and option  positions
entered  into by the  Portfolio  qualify as bona fide hedge  transactions,  as
defined under CFTC  regulations,  or, in the case of long positions,  that the
value of such  positions not exceed an amount of segregated  funds  determined
by  reference  to certain  cash and  securities  positions  maintained  by the
Portfolio and accrued  profits on such positions.  In addition,  the Portfolio
may not  purchase or sell any such  instruments  if,  immediately  thereafter,
the sum of the amount of initial margin deposits on the  Portfolio's  existing
futures positions would exceed 5% of the market value of its net assets.
         When the  Portfolio  purchases a futures  contract,  it will maintain
an amount of cash, cash equivalents  (for example,  commercial paper and daily
tender  adjustable  notes) or securities  in a segregated  account so that the
amount so segregated  plus the amount of initial and variation  margin held in
the account of its broker  equals the market  value of the  futures  contract,
thereby ensuring the transaction.
         Risk Factors in  Transactions  in Futures  Contracts.  The particular
municipal  bonds  comprising  the index  underlying  the municipal  bond index
futures  contract may vary from the bonds held by the Portfolio.  In addition,
the securities  underlying futures contracts on U.S. Treasury  securities will
not be the  same  as  securities  held  by the  Portfolio.  As a  result,  the
Portfolio's  ability  effectively  to hedge all or a  portion  of the value of
its municipal  bonds through the use of futures  contracts will depend in part
on the degree to which price  movements in the index  underlying the municipal
bond  index  futures  contract,  or the U.S.  Treasury  securities  underlying
other  futures  contracts  trade,   correlate  with  price  movements  of  the
municipal bonds held by the Portfolio.
         For  example,  where  prices of  securities  in the  Portfolio do not
move  in the  same  direction  or to the  same  extent  as the  values  of the
securities  or index  underlying  a  futures  contract,  the  trading  of such
futures  contracts may not effectively  hedge the Portfolio's  investments and
may result in trading  losses.  The correlation may be affected by disparities
in  the  average  maturity,  ratings,  geographical  mix or  structure  of the
Portfolio's  investments  as  compared  to those  comprising  the  index,  and
general economic or political factors.  In addition,  the correlation  between
movements  in the value of the index  underlying  a  futures  contract  may be
subject to change over time,  as  additions  to and  deletions  from the index
alter  its  structure.  In the  case of  futures  contracts  on U.S.  Treasury
securities  and  options  thereon,   the  anticipated   correlation  of  price
movements  between  the U.S.  Treasury  securities  underlying  the futures or
options  and   municipal   bonds  may  be  adversely   affected  by  economic,
political,  legislative or other  developments that have a disparate impact on
the respective  markets for such securities.  In the event that the Investment
Advisor  determines to enter into  transactions in financial futures contracts
other  than the  municipal  bond  index  futures  contract  or futures on U.S.
Treasury  securities,  the risk of imperfect  correlation between movements in
the prices of such futures  contracts  and the prices of municipal  bonds held
by the Portfolio may be greater.
         The trading of futures  contracts  on an index also  entails the risk
of  imperfect  correlation  between  movements  in the  price  of the  futures
contract  and the  value  of the  underlying  index.  The  anticipated  spread
between the prices may be distorted  due to  differences  in the nature of the
markets,  such as margin  requirements,  liquidity  and the  participation  of
speculators  in the  futures  markets.  The  risk  of  imperfect  correlation,
however,  generally  diminishes as the delivery month specified in the futures
contract approaches.
         Prior to exercise or expiration,  a position in futures  contracts or
options  thereon may be terminated  only by entering  into a closing  purchase
or  sale  transaction.  This  requires  a  secondary  market  on the  relevant
contract  market.  The Portfolio will enter into a futures or option  position
only if there  appears  to be a liquid  secondary  market  therefor,  although
there can be no assurance that such a liquid  secondary  market will exist for
any  particular  contract at any specific  time.  Thus, it may not be possible
to  close  out  a  position   once  it  has  been   established.   Under  such
circumstances,  the Portfolio could be required to make continuing  daily cash
payments  of  variation  margin in the event of adverse  price  movements.  In
such  situation,  if the Portfolio has  insufficient  cash, it may be required
to sell portfolio  securities to meet daily variation  margin  requirements at
a time when it may be  disadvantageous  to do so. In addition,  the  Portfolio
may be  required  to  perform  under  the  terms  of  the  futures  or  option
contracts it holds.  The  inability to close out futures or options  positions
also could have an adverse impact on the  Portfolio's  ability  effectively to
hedge its portfolio.
         When the  Portfolio  purchases an option on a futures  contract,  its
risk is  limited  to the  amount  of the  premium,  plus  related  transaction
costs,  although  this entire  amount may be lost.  In  addition,  in order to
profit from the  purchase of an option on a futures  contract,  the  Portfolio
may be required to exercise the option and  liquidate the  underlying  futures
contract,  subject  to the  availability  of a liquid  secondary  market.  The
trading of options on futures  contracts  also  entails the risk that  changes
in the value of the underlying  futures  contract will not be fully  reflected
in the  value  of the  option,  although  the  risk of  imperfect  correlation
generally  tends to diminish as the maturity  date of the futures  contract or
expiration date of the option approaches.
         "Trading  Limits"  or  "Position  Limits"  may also be imposed on the
maximum  number of  contracts  which any  person may hold at a given  time.  A
contract  market  may  order  the  liquidation  of  positions  found  to be in
violation of these limits and it may impose other  sanctions or  restrictions.
The  Investment  Advisor does not believe  that  trading  limits will have any
adverse impact on the strategies for hedging the Portfolio's investments.
         Further,  the trading of futures  contracts is subject to the risk of
the insolvency of a brokerage firm or clearing  corporation,  which could make
it  difficult or  impossible  to  liquidate  existing  positions or to recover
excess variation margin payments.
         In  addition  to the  risks of  imperfect  correlation  and lack of a
liquid  secondary  market  for  such  instruments,   transactions  in  futures
contracts   involve  risks  related  to  leveraging   and  the  potential  for
incorrect  forecasts of the direction  and extent of interest  rate  movements
within a given time frame.

INVESTMENT RESTRICTIONS

Fundamental Investment Restrictions
         The  Portfolio  has  adopted  the  following  fundamental  investment
restrictions.  These  restrictions  cannot be changed  without the approval of
the holders of a majority of the outstanding shares of the Portfolio.

         (1) The Portfolio may not make any  investment  inconsistent
         with  its  classification  as  a  nondiversified  investment
         company under the 1940 Act.
         (2) The Portfolio may not  concentrate  its  investments  in
         the   securities  of  issuers   primarily   engaged  in  any
         particular   industry  (other  than  securities   issued  or
         guaranteed  by  the  U.S.  Government  or  its  agencies  or
         instrumentalities    and   repurchase   agreements   secured
         thereby or domestic bank money market instruments).
         (3)  The  Portfolio  may  not  issue  senior  securities  or
         borrow  money,  except from banks for temporary or emergency
         purposes  and then  only in an  amount  up to 33 1/3% of the
         value  of its  total  assets  or as  permitted  by  law  and
         except by engaging in reverse repurchase  agreements,  where
         allowed.  In order to secure any  permitted  borrowings  and
         reverse  repurchase   agreements  under  this  section,  the
         Portfolio may pledge, mortgage or hypothecate its assets.
         (4) The  Portfolio  may not  underwrite  the  securities  of
         other  issuers,  except as  allowed  by law or to the extent
         that the purchase of  municipal  obligations  in  accordance
         with  its   investment   objective  and   policies,   either
         directly  from the  issuer,  or from an  underwriter  for an
         issuer, may be deemed an underwriting.
         (5) The  Portfolio  may not invest  directly in  commodities
         or real estate,  although it may invest in securities  which
         are  secured by real  estate or real  estate  mortgages  and
         securities of issuers  which invest or deal in  commodities,
         commodity futures, real estate or real estate mortgages.
         (6) The  Portfolio  may not make loans,  other than  through
         the  purchase of money  market  instruments  and  repurchase
         agreements  or by  the  purchase  of  bonds,  debentures  or
         other  debt   securities,   or  as  permitted  by  law.  The
         purchase  of all or a  portion  of an issue of  publicly  or
         privately  distributed  debt  obligations in accordance with
         its investment objective,  policies and restrictions,  shall
         not constitute the making of a loan.

Nonfundamental Investment Restrictions
         The  Board of  Trustees  has  adopted  the  following  nonfundamental
investment  restrictions.  A  nonfundamental  investment  restriction  can  be
changed by the Board at any time without a shareholder vote.

         (1)  The   Portfolio   may  not  purchase   common   stocks,
         preferred stocks, warrants, or other equity securities.
         (2) The  Portfolio  does not intend to make any purchases of
         securities if borrowing exceeds 5% of its total assets.
         (3) The Portfolio may not sell  securities  short,  purchase
         securities  on  margin,  or  write or  purchase  put or call
         options,    except   as   permitted   in   connection   with
         transactions in futures  contracts and options thereon.  The
         Portfolio  reserves  the right to purchase  securities  with
         puts attached or with demand features.
         (4)  The  Portfolio  may not  invest  more  than  35% of net
         assets  in   non-investment   grade  debt  securities.   The
         Portfolio  does not  intend  to  purchase  more  than 15% of
         non-investment grade debt securities.
         (5) Though  nondiversified,  the  Portfolio  does not intend
         to purchase more than 15% of assets in any one issuer.
         (6) The  Portfolio may not purchase  illiquid  securities if
         more than 10% of the  value of the  Portfolio's  net  assets
         would be invested in such securities.

PURCHASES AND REDEMPTIONS OF SHARES

         Share  certificates  will not be issued  unless  requested in writing
by the investor.  No charge will be made for share  certificate  requests.  No
certificates will be issued for fractional shares.
         Amounts  redeemed by check  redemption  may be mailed to the investor
without  charge.  Amounts  of more  than $50 and  less  than  $300,000  may be
transferred  electronically  at no charge to the  investor.  Amounts of $1,000
or more  will be  transmitted  by  wire,  without  charge,  to the  investor's
account  at a  domestic  commercial  bank  that  is a  member  of the  Federal
Reserve System or to a  correspondent  bank. A charge of $5 is imposed on wire
transfers  of less  than  $1,000.  If the  investor's  bank  is not a  Federal
Reserve System member,  failure of immediate  notification to that bank by the
correspondent  bank  could  result  in a delay in  crediting  the funds to the
investor's bank account.
         Telephone  redemption  requests which would require the redemption of
shares  purchased by check or electronic  funds  transfer  within the previous
10 business  days may not be honored.  The Fund  reserves  the right to modify
the telephone redemption privilege.
         To change redemption  instructions  already given,  shareholders must
send a written  notice  to  Calvert  Group,  c/o  NFDS,  330 West 9th  Street,
Kansas  City,  MO,  64105,  with a voided  copy of a check for the bank wiring
instructions  to be added.  If a voided check does not  accompany the request,
then the request must be signature  guaranteed by a commercial  bank,  savings
and loan association,  trust company,  member firm of any national  securities
exchange,  or certain credit  unions.  Further  documentation  may be required
from corporations, fiduciaries, and institutional investors.
         The  right of  redemption  may be  suspended  or the date of  payment
postponed  for any period  during which the New York Stock  Exchange is closed
(other than customary weekend and holiday  closings),  when trading on the New
York Stock Exchange is restricted,  or an emergency  exists,  as determined by
the  SEC,  or if  the  Commission  has  ordered  such  a  suspension  for  the
protection of shareholders.  Redemption  proceeds are normally mailed or wired
the next  business day after a proper  redemption  request has been  received,
unless redemptions have been suspended or postponed as described above.
         Redemption  proceeds  are  normally  paid  in  cash.   However,   the
Portfolio  has the  right to  redeem  shares  in  assets  other  than cash for
redemption  amounts  exceeding,  in any 90-day  period,  $250,000 or 1% of the
net asset value of the Portfolio, whichever is less.

DIVIDENDS, DISTRIBUTIONS AND TAX MATTERS

         The Funds  intend to  continue  to  qualify as  regulated  investment
companies under  Subchapter M of the Internal  Revenue Code. If for any reason
the Fund  should fail to qualify,  it would be taxed as a  corporation  at the
Fund level, rather than passing through its income and gains to shareholders.
         The Portfolio  declares and pays monthly  dividends of its net income
to  shareholders  of  record as of the close of  business  on each  designated
monthly  record date. Net investment  income  consists of the interest  income
earned on investments  (adjusted for  amortization of original issue discounts
or premiums or market premiums), less estimated expenses.
         Dividends  are  automatically   reinvested  at  net  asset  value  in
additional  shares.  Capital gains,  if any, are normally paid once a year and
will be  automatically  reinvested  at net asset value in  additional  shares,
unless  you  choose  otherwise.  You may  elect to have  their  dividends  and
distributions  paid out  monthly  in cash.  You may also  request to have your
dividends  and  distributions  from the  Portfolio  invested  in shares of any
other Calvert  Group Fund, to be invested in that Fund or Portfolio  without a
sales charge.
         The  Portfolio's   dividends  of  net  investment  income  constitute
exempt-interest  dividends on which  shareholders are not generally subject to
federal  income  tax;  however,  under  the  Act,  dividends  attributable  to
interest  on  certain  private  activity  bonds  must be  included  in federal
alternative  minimum  taxable income for the purpose of determining  liability
(if any) for  individuals  and for  corporations.  The  Portfolio's  dividends
derived from taxable  interest and  distributions  of net  short-term  capital
gains whether taken in cash or  reinvested in additional  shares,  are taxable
to  shareholders  as  ordinary  income and do not  qualify  for the  dividends
received deduction for corporations.
         A  shareholder  may also be  subject  to  state  and  local  taxes on
dividends and  distributions  from the  Portfolio.  The Portfolio  will notify
shareholders   annually   about  the  federal  tax  status  of  dividends  and
distributions paid by the Portfolio and the amount of dividends  withheld,  if
any, during the previous year.
         The  Code  provides  that  interest  on   indebtedness   incurred  or
continued  in order to  purchase  or carry  shares of a  regulated  investment
company which  distributes  exempt-interest  dividends  during the year is not
deductible.  Furthermore,  entities or persons who are "substantial users" (or
persons  related to  "substantial  users") of  facilities  financed by private
activity bonds should consult their tax advisers before  purchasing  shares of
the  Portfolio.  "Substantial  user"  is  generally  defined  as  including  a
"non-exempt  person"  who  regularly  uses in  trade or  business  a part of a
facility financed from the proceeds of private activity bonds.
         Investors  should  note  that  the  Code  may  require  investors  to
exclude the initial  sales  charge,  if any, paid on the purchase of Portfolio
shares  from the tax basis of those  shares if the  shares are  exchanged  for
shares  of  another  Calvert  Group  Fund  within  90 days of  purchase.  This
requirement  applies  only to the  extent  that the  payment  of the  original
sales  charge on the shares of the  Portfolio  causes a reduction in the sales
charge  otherwise  payable on the shares of the Calvert Group Fund acquired in
the exchange,  and  investors may treat sales charges  excluded from the basis
of the original shares as incurred to acquire the new shares.
         The  Portfolio is required to withhold 31% of any  long-term  capital
gain  dividends  and  31% of  each  redemption  transaction  occurring  in the
Portfolio if: (a) the  shareholder's  social security number or other taxpayer
identification  number ("TIN") is not provided,  or an obviously incorrect TIN
is provided;  (b) the shareholder  does not certify under penalties of perjury
that  the  TIN  provided  is  the  shareholder's  correct  TIN  and  that  the
shareholder is not subject to backup  withholding under section  3406(a)(1)(C)
of  the  Code  because  of   underreporting   (however,   failure  to  provide
certification  as to the  application  of section  3406(a)(1)(C)  will  result
only in backup  withholding on capital gain  dividends,  not on  redemptions);
or (c) the Fund is  notified  by the  Internal  Revenue  Service  that the TIN
provided   by  the   shareholder   is   incorrect   or  that  there  has  been
underreporting   of  interest  or  dividends  by  the  shareholder.   Affected
shareholders will receive  statements at least annually  specifying the amount
withheld.
         In addition  the  Portfolio  is  required  to report to the  Internal
Revenue  Service  the  following   information   with  respect  to  redemption
transactions in the Portfolio:  (a) the shareholder's name,  address,  account
number and taxpayer  identification  number; (b) the total dollar value of the
redemptions; and (c) the Portfolio's identifying CUSIP number.
         Certain   shareholders   are,   however,   exempt   from  the  backup
withholding and broker reporting  requirements.  Exempt shareholders  include:
corporations;  financial institutions;  tax-exempt  organizations;  individual
retirement  plans;  the  U.S.,  a State,  the  District  of  Columbia,  a U.S.
possession,  a  foreign  government,  an  international  organization,  or any
political  subdivision,  agency  or  instrumentality  of any of the  foregoing
U.S.  registered  commodities or securities  dealers;  real estate  investment
trusts;  registered  investment  companies;  bank common trust funds;  certain
charitable  trusts;  and foreign central banks of issue.  Non-resident  aliens
also are generally not subject to either  requirement  but, along with certain
foreign  partnerships  and  foreign  corporations,  may  instead be subject to
withholding under section 1441 of the Code.  Shareholders  claiming  exemption
from  backup  withholding  and  broker  reporting  should  call or  write  the
Portfolio for further information.

VALUATION OF SHARES

         The  Portfolio's  assets are normally  valued  utilizing  the average
bid dealer market  quotation as furnished by an independent  pricing  service.
Securities  and other  assets  for which  market  quotations  are not  readily
available  are valued based on the current  market for similar  securities  or
assets,  as  determined  in good faith by the  Portfolio's  Advisor  under the
supervision of the Board of Trustees.  The Portfolio  determines the net asset
value of its shares  every  business  day at the close of the regular  session
of the New York Stock Exchange  (generally,  4:00 p.m.  Eastern time),  and at
such other times as may be necessary or  appropriate.  The Portfolio  does not
determine  net asset  value on  certain  national  holidays  or other  days on
which the New York Stock  Exchange is closed:  New Year's Day,  Martin  Luther
King Day,  Presidents'  Day,  Good Friday,  Memorial  Day,  Independence  Day,
Labor Day, Thanksgiving Day and Christmas Day.
         Valuations,  market  quotations and market  equivalents  are provided
the Portfolio by Kenny S&P Evaluation  Services,  a subsidiary of McGraw-Hill.
The use of Kenny as a pricing  service by the  Portfolio  has been approved by
the Board of Trustees.  Valuations  provided by Kenny are  determined  without
exclusive  reliance on quoted prices and take into  consideration  appropriate
factors  such as  institution-size  trading in similar  groups of  securities,
yield,   quality,    coupon   rate,   maturity,   type   of   issue,   trading
characteristics, and other market data.

Net Asset Value and Offering Price Per Share
         Net asset value per share
         ($57,677,447/3,430,945 shares)                        $16.81
         Maximum sales charge
         (3.75% of offering price)                               0.65
         Offering price per share                              $17.46

CALCULATION OF YIELD AND TOTAL RETURN

         From time to time,  the  Portfolio  advertises  its  "total  return."
Total  return  is  calculated  separately  for each  class.  Total  return  is
historical  in nature and is not  intended  to  indicate  future  performance.
Total  return will be quoted for the most recent  one-year  period,  five-year
period and  ten-year.  Total  return  quotations  for periods in excess of one
year  represent  the average  annual total  return for the period  included in
the particular  quotation.  Total return is a computation  of the  Portfolio's
dividend yield plus or minus realized or unrealized  capital  appreciation  or
depreciation,  less fees and  expenses.  All total return  quotations  reflect
the deduction of the Portfolio's  maximum sales charge,  except  quotations of
"return  without  maximum  load,"  which do not deduct the sales  charge,  and
"actual  return,"  which reflect  deduction of the sales charge only for those
periods  when a sales  charge  was  actually  imposed.  Thus,  in the  formula
below,  for return  without  maximum load, P = the entire $1,000  hypothetical
initial  investment  and does not reflect the  deduction of any sales  charge;
for actual return,  P = a hypothetical  initial  investment of $1,000 less any
sales  charge  actually  imposed at the  beginning of the period for which the
performance  is being  calculated.  Note:  "Total  Return"  as  quoted  in the
Financial  Highlights  section of the Fund's  Prospectus  and Annual Report to
Shareholders,  however,  per SEC  instructions,  does not reflect deduction of
the  sales  charge,  and  corresponds  to  "return  without  maximum  load" as
referred to herein.  Return without  maximum load should be considered only by
investors,  such as  participants  in certain pension plans, to whom the sales
charge does not apply,  or for  purposes of  comparison  only with  comparable
figures  which also do not reflect  sales  charges,  such as Lipper  averages.
Total return is computed according to the following formula:

                                P(1 +T)n = ERV

where P = a hypothetical  initial payment of $1,000;  T = average annual total
return;  n =  number  of  years  and ERV = the  ending  redeemable  value of a
hypothetical  $1,000  payment  made at the  beginning  of the 1, 5, or 10 year
periods at the end of such periods (or portions thereof if applicable).
         Returns for the periods indicated (ended 12/31/98) are as follows:

                  With Max. Load        W/O Max. Load

One Year          1.15%                 5.07%
Five Years        4.94%                 5.74%
Ten Years         6.94%                 7.35%

         The Portfolio  also  advertises,  from time to time,  its "yield" and
"tax  equivalent  yield."  As  with  total  return,  both  yield  figures  are
historical  and are not  intended  to  indicate  future  performance.  "Yield"
quotations  for each class refer to the  aggregate  imputed  yield-to-maturity
of each of the  Portfolio's  investments  based on the market  value as of the
last day of a given  thirty-day  or one-month  period,  less  expenses (net of
reimbursement),  divided by the average  daily  number of  outstanding  shares
entitled to receive  dividends  times the maximum  offering  price on the last
day of the period (so that the effect of the sales  charge is  included in the
calculation),  compounded on a "bond  equivalent," or semi-annual,  basis. The
Portfolio's yield is computed according to the following formula:

                         Yield = 2[(a-b/cd)+1)6 - 1]

where a =  dividends  and  interest  earned  during the  period;  b = expenses
accrued for the period (net of  reimbursement);  c = the average  daily number
of shares  outstanding  during  the  period  that  were  entitled  to  receive
dividends;  and d = the  maximum  offering  price per share on the last day of
the period.
         The tax  equivalent  yield is the yield an investor would be required
to obtain from taxable  investments to equal the Portfolio's  yield,  all or a
portion of which may be exempt from federal  income taxes.  The tax equivalent
yield is computed  per class by taking the portion of the class'  yield exempt
from regular  federal income tax and  multiplying the exempt yield by a factor
based upon a stated  income  tax rate,  then  adding the  portion of the yield
that is not exempt from regular  federal  income tax. The factor which is used
to calculate the tax  equivalent  yield is the  reciprocal  of the  difference
between 1 and the  applicable  income  tax rate,  which  will be stated in the
advertisement.  For  the  thirty-day  period  ended  December  31,  1998,  the
Portfolio  yield for shares was 4.10% and its  federal  tax  equivalent  yield
was 6.41% for an  investor in the 36% federal  income tax  bracket,  and 6.79%
for an investor in the 39.6% federal income tax bracket.

ADVERTISING

         The Fund or its affiliates may provide  information  such as, but not
limited  to,  the  economy,   investment   climate,   investment   principles,
sociological  conditions  and  political  ambiance.   Discussion  may  include
hypothetical  scenarios  or  lists of  relevant  factors  designed  to aid the
investor in  determining  whether the Fund is compatible  with the  investor's
goals.  The Fund may list  portfolio  holdings or give  examples or securities
that may have been  considered  for inclusion in the  Portfolio,  whether held
or not.
         The Fund or its affiliates may supply  comparative  performance  data
and rankings from  independent  sources such as Donoghue's  Money Fund Report,
Bank Rate Monitor,  Money,  Forbes,  Lipper  Analytical  Services,  Inc.,  CDA
Investment  Technologies,  Inc.,  Wiesenberger  Investment  Companies Service,
Russell  2000/Small  Stock  Index,  Mutual  Fund Values  Morningstar  Ratings,
Mutual Fund  Forecaster,  Barron's,  The Wall Street  Journal,  and Schabacker
Investment  Management,  Inc.  Such  averages  generally  do not  reflect  any
front-  or  back-end  sales  charges  that  may be  charged  by  Funds in that
grouping.  The Fund may also cite to any source,  whether in print or on-line,
such as Bloomberg,  in order to acknowledge  origin of  information.  The Fund
may compare  itself or its portfolio  holdings to other  investments,  whether
or not issued or  regulated by the  securities  industry,  including,  but not
limited  to,  certificates  of  deposit  and  Treasury  notes.  The Fund,  its
Advisor,  and its affiliates reserve the right to update performance  rankings
as new rankings become available.
         Calvert   Group  is  the   nation's   leading   family  of   socially
responsible  mutual funds, both in terms of socially  responsible  mutual fund
assets  under  management,  and number of  socially  responsible  mutual  fund
portfolios  offered  (source:  Social  Investment  Forum,  December 31, 1998).
Calvert  Group was also the first to offer a family  of  socially  responsible
mutual fund portfolios.

TRUSTEES AND OFFICERS

         The Fund's Board of Trustees  supervises  the Fund's  activities  and
reviews its contracts with companies that provide it with services.
         RICHARD  L.  BAIRD,  JR.,  Trustee.   Mr.  Baird  is  Executive  Vice
President for the Family Health Council, Inc. in Pittsburgh,  Pennsylvania,  a
non-profit  corporation  which provides family planning  services,  nutrition,
maternal/child  health care, and various health screening services.  Mr. Baird
is a  trustee/director  of each of the  investment  companies  in the  Calvert
Group of Funds,  except for Calvert Variable Series,  Inc.,  Calvert New World
Fund, Inc. and Calvert World Values Fund,  Inc. DOB:  05/09/48.  Address:  211
Overlook Drive, Pittsburgh, Pennsylvania 15216.
         FRANK H. BLATZ,  JR.,  Esq.,  Trustee.  Mr. Blatz is a partner in the
law firm of Snevily,  Ely,  Williams & Blatz.  He was  formerly a partner with
Abrams,  Blatz,  Gran,  Hendricks  &  Reina,  P.A.  He is also a  director  of
Calvert Variable Series, Inc. DOB: 10/29/35.  Address:  308 East Broad Street,
Westfield, New Jersey 07091.
         FREDERICK T. BORTS, M.D., Trustee. Dr. Borts is a radiologist with
Kaiser Permanente. Prior to that, he was a radiologist at Bethlehem Medical
Imaging in Allentown, Pennsylvania. DOB: 07/23/49. Address: 16 Iliahi
Street, Honolulu, Hawaii, 96817.
         CHARLES E. DIEHL,  Trustee.  Mr. Diehl is a self-employed  consultant
and  is  Vice  President  and  Treasurer  Emeritus  of the  George  Washington
University.   He  has  retired  from  University  Support  Services,  Inc.  of
Herndon,  Virginia.  Formerly,  he  was  a  Director  of  Acacia  Mutual  Life
Insurance   Company,   and  is  currently  a  Director  of  Servus   Financial
Corporation.   DOB:  10/13/22.  Address:  1658  Quail  Hollow  Court,  McLean,
Virginia 22101.
         DOUGLAS E. FELDMAN,  M.D.,  Trustee.  Dr. Feldman is managing partner
of  Feldman  Otolaryngology,  Head and Neck  Surgery  in  Washington,  D.C.  A
graduate  of  Harvard   Medical   School,   he  is   Associate   Professor  of
Otolaryngology,  Head and Neck  Surgery at  Georgetown  University  and George
Washington  University  Medical School, and past Chairman of the Department of
Otolaryngology,  Head and Neck Surgery at the Washington  Hospital Center.  He
is  included in The Best  Doctors in America.  DOB:  05/23/48.  Address:  7536
Pepperell Drive, Bethesda, Maryland 20817.
         PETER W. GAVIAN,  CFA, Trustee.  Mr. Gavian is President of Corporate
Finance of  Washington,  Inc.  Formerly,  he was a principal of Gavian De Vaux
Associates,  an  investment  banking  firm.  He is also a Chartered  Financial
Analyst and an accredited senior business appraiser.  DOB: 12/08/32.  Address:
3005 Franklin Road North, Arlington, Virginia 22201.
         JOHN G. GUFFEY,  JR., Trustee.  Mr. Guffey is organizing  director of
the Community Capital Bank in Brooklyn,  New York, and a financial  consultant
to various  organizations.  In  addition,  he is a director  of the  Community
Bankers Mutual Fund of Denver,  Colorado,  a director of Ariel Funds,  and the
Treasurer  and Director of Silby,  Guffey,  and Co.,  Inc., a venture  capital
firm.  Mr.  Guffey  is a  trustee/director  of  each of the  other  investment
companies in the Calvert Group of Funds,  except for Calvert  Variable Series,
Inc. and Calvert New World Fund, Inc.
        Mr.  Guffey  has  been  advised  that  the   Securities  and  Exchange
Commission  ("SEC")  has entered an order  against him  relating to his former
service as a director of  Community  Bankers  Mutual Fund,  Inc.  This fund is
not  connected  with  any  Calvert  Fund  or  the  Calvert  Group  and  ceased
operations  in  September,  1994.  Mr.  Guffey  consented  to the entry of the
order  without  admitting  or denying  the  findings  in the order.  The order
contains  findings (1) that the Community  Bankers  Mutual  Fund's  prospectus
and statement of additional  information  were materially false and misleading
because  they  misstated  or failed to state  material  facts  concerning  the
pricing of fund  shares  and the  percentage  of  illiquid  securities  in the
fund's  portfolio  and  that Mr.  Guffey,  as a member  of the  fund's  board,
should  have  known  of  these   misstatements  and  therefore   violated  the
Securities  Act of 1933;  (2) that the price of the fund's  shares sold to the
public  was not  based  on the  current  net  asset  value of the  shares,  in
violation  of the  Investment  Company  Act of 1940 (the  "Investment  Company
Act");  and (3) that the board of the fund,  including  Mr.  Guffey,  violated
the  Investment  Company Act by  directing  the filing of a  materially  false
registration  statement.  The order  directed  Mr.  Guffey to cease and desist
from  committing or causing  future  violations  and to pay a civil penalty of
$5,000.  The SEC placed no restrictions  on Mr.  Guffey's  continuing to serve
as a Trustee or Director of mutual funds. DOB:  05/15/48.  Address:  388 Calli
Calina, Santa Fe, New Mexico 87501.
        *BARBARA J. KRUMSIEK,  President and Trustee.  Ms.  Krumsiek serves as
President,  Chief Executive  Officer and Vice Chairman of Calvert Group,  Ltd.
and as an officer and director of each of its affiliated  companies.  She is a
director of Calvert-Sloan  Advisers,  L.L.C., and a  trustee/director  of each
of the  investment  companies in the Calvert Group of Funds.  Ms.  Krumsiek is
the President of each of the investment  companies,  except for Calvert Social
Investment  Fund, of which she is the Senior Vice President.  Prior to joining
Calvert Group,  Ms.  Krumsiek  served as a Managing  Director of Alliance Fund
Distributors, Inc. DOB: 08/09/52.
         M. CHARITO  KRUVANT,  Trustee.  Ms.  Kruvant is President  and CEO of
Creative  Associates  International,  Inc., a firm that  specializes  in human
resources  development,  information  management,  public  affairs and private
enterprise  development.  She is also a Director of Calvert  Variable  Series,
Inc.,  and  Acacia  Federal  Savings  Bank.  DOB:  12/08/45.   Address:   5301
Wisconsin Avenue, N.W., Washington, D.C. 20015.
         ARTHUR J. PUGH,  Trustee.  Mr. Pugh is a Director of Calvert Variable
Series,  Inc., and serves as a director of Acacia Federal  Savings Bank.  DOB:
09/24/37. Address: 4823 Prestwick Drive, Fairfax, Virginia 22030.
         *DAVID R. ROCHAT,  Senior Vice  President and Trustee.  Mr. Rochat is
Executive Vice President of Calvert Asset Management  Company,  Inc., Director
and Secretary of Grady,  Berwald and Co.,  Inc., and Director and President of
Chelsea  Securities,  Inc. He is the Senior Vice  President of First  Variable
Rate Fund,  Calvert Tax-Free  Reserves,  Calvert Municipal Fund, Inc., Calvert
Cash  Reserves,  and  The  Calvert  Fund.  DOB:  10/07/37.  Address:  Box  93,
Chelsea, Vermont 05038.
         *D. WAYNE SILBY, Esq.,  Trustee.  Mr. Silby is a trustee/director  of
each of the  investment  companies in the Calvert  Group of Funds,  except for
Calvert  Variable  Series,  Inc.  and  Calvert New World  Fund.  Mr.  Silby is
Executive  Chairman  of Group  Serve,  Inc.,  an internet  company  focused on
community  building   collaborative  tools,  and  an  officer,   director  and
shareholder  of  Silby,  Guffey &  Company,  Inc.,  which  serves  as  general
partner  of  Calvert  Social  Venture  Partners  ("CSVP").  CSVP is a  venture
capital firm investing in socially  responsible small companies.  He is also a
Director of Acacia Mutual Life  Insurance  Company.  DOB:  07/20/48.  Address:
1715 18th Street, N.W., Washington, D.C. 20009.
         RENO J. MARTINI,  Senior Vice  President.  Mr.  Martini is a director
and Senior Vice  President of Calvert  Group,  Ltd., and Senior Vice President
and Chief  Investment  Officer of Calvert Asset Management  Company,  Inc. Mr.
Martini is also a director and President of  Calvert-Sloan  Advisers,  L.L.C.,
and a director and officer of Calvert New World Fund. DOB: 1/13/50.
         RONALD M.  WOLFSHEIMER,  CPA,  Treasurer.  Mr.  Wolfsheimer is Senior
Vice  President and Chief  Financial  Officer of Calvert  Group,  Ltd. and its
subsidiaries and an officer of each of the other  investment  companies in the
Calvert Group of Funds.  Mr.  Wolfsheimer  is Vice  President and Treasurer of
Calvert-Sloan Advisers,  L.L.C., and a director of Calvert Distributors,  Inc.
DOB: 07/24/47.
         WILLIAM  M.  TARTIKOFF,  Esq.,  Vice  President  and  Secretary.  Mr.
Tartikoff  is an officer of each of the  investment  companies  in the Calvert
Group of Funds, and is Senior Vice President,  Secretary,  and General Counsel
of Calvert Group,  Ltd., and each of its  subsidiaries.  Mr. Tartikoff is also
Vice President and Secretary of  Calvert-Sloan  Advisers,  L.L.C.,  a director
of Calvert  Distributors,  Inc.,  and is an officer  of Acacia  National  Life
Insurance Company. DOB: 08/12/47.
         DANIEL K. HAYES,  Vice  President.  Mr.  Hayes is Vice  President  of
Calvert  Asset  Management  Company,  Inc.,  and is an  officer of each of the
other investment  companies in the Calvert Group of Funds,  except for Calvert
New World Fund, Inc. DOB: 09/09/50.
         SUSAN  WALKER  BENDER,  Esq.,  Assistant  Secretary.  Ms.  Bender  is
Associate  General  Counsel of Calvert  Group,  Ltd. and an officer of each of
its subsidiaries  and  Calvert-Sloan  Advisers,  L.L.C. She is also an officer
of each of the  other  investment  companies  in the  Calvert  Group of Funds.
DOB: 01/29/59.
         KATHERINE STONER, Esq., Assistant Secretary. Ms. Stoner is
Associate General Counsel of Calvert Group and an officer of each of its
subsidiaries and Calvert-Sloan Advisers, L.L.C. She is also an officer of
each of the other investment companies in the Calvert Group of Funds. DOB:
10/21/56.
         IVY WAFFORD DUKE, Esq.,  Assistant  Secretary.  Ms. Duke is Associate
General  Counsel of Calvert  Group and an officer of each of its  subsidiaries
and  Calvert-Sloan  Advisers,  L.L.C.  She is also an  officer  of each of the
other  investment  companies in the Calvert  Group of Funds and  Secretary and
provides  counsel  to the  Calvert  Social  Investment  Foundation.  Prior  to
working  at  Calvert  Group,  Ms.  Duke  was an  Associate  in the  Investment
Management  Group of the Business and Finance  Department at Drinker  Biddle &
Reath. DOB: 09/07/68.
         VICTOR FRYE, Esq.,  Assistant Secretary and Compliance  Officer.  Mr.
Frye is Counsel  and  Compliance  Officer  of Calvert  Group and an officer of
each of its  subsidiaries  and  Calvert-Sloan  Advisers,  L.L.C. He is also an
officer of each of the other  investment  companies  in the  Calvert  Group of
Funds.  Prior to working at Calvert  Group,  Mr.  Frye was Counsel and Manager
of the Compliance Department at The Advisors Group. DOB: 10/15/58.

         The address of directors and officers,  unless  otherwise  noted,  is
4550 Montgomery Avenue, Suite 1000N,  Bethesda,  Maryland 20814.  Trustees and
officers  of the Fund as a group  own less than 1% of the  Fund's  outstanding
shares.  Trustees  marked with an *, above,  are  "interested  persons" of the
Fund, under the Investment Company Act of 1940.
         Each   of   the   above   directors/trustees   and   officers   is  a
director/trustee  or  officer  of  each  of the  investment  companies  in the
Calvert Group of Funds with the exception of Calvert Social  Investment  Fund,
of which only Messrs.  Baird,  Guffey and Silby and Ms. Krumsiek are among the
trustees,  Calvert Variable Series,  Inc., of which only Messrs.  Blatz, Diehl
and Pugh,  Mmes.  Krumsiek and Kruvant are among the directors,  Calvert World
Values Fund,  Inc.,  of which only Messrs.  Guffey and Silby and Ms.  Krumsiek
are among the directors,  and Calvert New World Fund,  Inc., of which only Ms.
Krumsiek and Mr. Martini are among the directors.
         The  Audit  Committee  of the Board is  composed  of  Messrs.  Baird,
Blatz,  Feldman,  Guffey  and Pugh and Ms.  Kruvant.  The  Board's  Investment
Policy  Committee  is composed of Messrs.  Borts,  Diehl,  Gavian,  Rochat and
Silby and Ms. Krumsiek.
         During  1998,  Trustees  of the Fund not  affiliated  with the Fund's
Advisor  were paid  $6,418 by the  Long-Term  Portfolio.  Trustees of the Fund
not  affiliated  with the Advisor  currently  receive an annual fee of $20,500
for  service  as a member of the Board of  Trustees  of the  Calvert  Group of
Funds  plus a fee of $750 to  $1,500  for each  Board  and  Committee  meeting
attended;  such fees are  allocated  among the Funds on the basis of their net
assets.
         Trustees  of the Fund not  affiliated  with the  Fund's  Advisor  may
elect to defer  receipt of all or a  percentage  of their fees and invest them
in any fund in the  Calvert  Family of Funds  through  the  Trustees  Deferred
Compensation  Plan (shown as "Pension or Retirement  Benefits  Accrued as part
of Fund  Expenses,"  below).  Deferral of the fees is designed to maintain the
parties in the same position as if the fees were paid on a current basis.
Trustee Compensation Table

Fiscal Year 1998      Aggregate         Pension or   Total Compensation
                      Compensation      Retirement   from Benefits
(unaudited numbers)   from Registrant   Accrued as   Registrant and Fund
                      for Service       part of      Complex paid to
                      as Trustee        of Registrant     Trustee**
                                        Expenses*

Name of Trustee

Richard L. Baird, Jr. $24,732           $0                $39,550
Frank H. Blatz, Jr.   $25,797           $25,797           $42,100
Frederick T. Borts    $23,674           $0                $33,250
Charles E. Diehl      $25,803           $25,803           $41,500
Douglas E. Feldman    $25,797           $0                $36,250
Peter W. Gavian       $25,804           $12,902           $36,250
John G. Guffey, Jr.   $24,768           $0                $62,665
M. Charito Kruvant    $25,797           $15,477           $36,250
Arthur J. Pugh        $25,797           $0                $41,500
D. Wayne Silby        $24,739           $0                $67,780

*Messrs. Blatz, Diehl, Gavian and Pugh and Ms. Kruvant have chosen to defer
a portion of their compensation. As of December 31, 1998, total deferred
compensation, including dividends and capital appreciation, was $644,247.37,
$672,374.09, $172,445.85, $216,322.53, and $23,295.55, for each trustee,
respectively.
**The Fund Complex consists of nine (9) registered investment companies.

INVESTMENT ADVISOR

         The Fund's  Investment  Advisor is Calvert Asset Management  Company,
Inc.,  4550  Montgomery  Avenue,  Suite 1000N,  Bethesda,  Maryland  20814,  a
subsidiary  of  Calvert  Group,  Ltd.,  which is a  controlled  subsidiary  of
Ameritas-Acacia Mutual Holding Company.
         The  Advisory  Contract  between the Fund and the Advisor will remain
in effect  indefinitely,  provided  continuance  is approved at least annually
by the vote of the  holders of a  majority  of the  outstanding  shares of the
Fund,  or by  the  Trustees  of the  Fund;  and  further  provided  that  such
continuance  is  also  approved  annually  by the  vote of a  majority  of the
Trustees  of the  Fund  who are not  parties  to the  Contract  or  interested
persons of such  parties,  cast in person at a meeting  called for the purpose
of voting on such  approval.  The Contract may be terminated  without  penalty
by  either  party  on  60  days'  prior  written  notice;   it   automatically
terminates in the event of its assignment.
         Under  the  Contract,   the  Advisor   manages  the   investment  and
reinvestment  of the Fund's  assets,  subject to the  direction and control of
the Fund's Board of Trustees.  For its  services,  the Advisor  receives  from
the  Portfolio  an  annual  fee of  0.60% of the  first  $500  million  of the
Portfolio's  average daily net assets,  0.50% of the next $500 million of such
assets, and 0.40% of all such assets over $1 billion.
         The advisory fee is payable  monthly.  The Advisor reserves the right
(i)  to  waive  all or a part  of its  fee  and  (ii)  to  compensate,  at its
expense,   broker-dealers   in   consideration   of  their   promotional   and
administrative services.
         The Advisor  provides the Fund with  investment  advice and research,
pays the  salaries  and fees of all  Trustees  and  executive  officers of the
Fund who are  principals  of the Advisor,  and pays  certain Fund  advertising
and  promotional  expenses.   The  Fund  pays  all  other  administrative  and
operating  expenses,   including:   custodial  fees;   shareholder  servicing;
dividend  disbursing and transfer  agency fees;  administrative  service fees;
federal and state securities  registration  fees;  insurance  premiums;  trade
association  dues;  interest,  taxes and other business fees;  legal and audit
fees; and brokerage  commissions and other costs  associated with the purchase
and sale of portfolio securities.
         The Advisor may  voluntarily  reimburse  the  Portfolio for expenses.
The advisory fees paid by the Portfolio to Calvert  Asset  Management  Company
for fiscal years 1996, 1997, and 1998 were $322,713,  $307,550,  and $331,988,
respectively.



ADMINISTRATIVE SERVICES

         Calvert  Administrative  Services  Company  ("CASC"),  a wholly-owned
subsidiary of Calvert  Group,  Ltd.,  has been retained by the Fund to provide
certain  administrative  services  necessary  to the  conduct  of  the  Fund's
affairs.  Prior to August 1, 1997,  CASC  received a fee of $200,000  per year
for providing  such  services,  allocated  among  Portfolios  based on assets.
Effective  August 1, 1997,  the fee structure  changed.  Exclusive of the CTFR
Money  Market  Portfolio,  the Fund pays an annual fee of  $80,000,  allocated
between the remaining  Portfolios based on assets. The administrative  service
fees paid by the  Portfolio  to CASC for fiscal  years  1996,  1997,  and 1998
were $3,934, $4,158, and $4,476, respectively.

TRANSFER AND SHAREHOLDER SERVICING AGENTS

         National Financial Data Services,  Inc. ("NFDS"),  330 W. 9th Street,
Kansas City,  Missouri  64105, a subsidiary of State Street Bank & Trust,  has
been  retained by the Fund to act as transfer  agent and  dividend  disbursing
agent.  These  responsibilities  include:  responding  to certain  shareholder
inquiries and instructions,  crediting and debiting  shareholder  accounts for
purchases and  redemptions  of Fund shares and confirming  such  transactions,
and  daily  updating  of  shareholder  accounts  to  reflect  declaration  and
payment of dividends.
         Calvert  Shareholder   Services,   Inc.  ("CSSI"),   4550  Montgomery
Avenue,  Bethesda,  Maryland  20814, a subsidiary of Calvert Group,  Ltd., has
been retained by the Fund to act as shareholder  servicing agent.  Shareholder
servicing  responsibilities  include  responding to shareholder  inquiries and
instructions  concerning their accounts,  entering any telephoned purchases or
redemptions  into the NFDS system,  maintenance  of  broker-dealer  data,  and
preparing  and  distributing   statements  to  shareholders   regarding  their
accounts.  Calvert  Shareholder  Services,  Inc. was the sole  transfer  agent
prior to January 1, 1998.
         For these  services,  NFDS and  Calvert  Shareholder  Services,  Inc.
receive a fee based on the number of shareholder accounts and transactions.

INDEPENDENT ACCOUNTANTS AND CUSTODIANS

         PricewaterhouseCoopers   LLP,  250  West  Pratt  Street,   Baltimore,
Maryland  21201,  has  been  selected  by the  Board of  Trustees  to serve as
independent  accountants  for fiscal  year  1999.  State  Street  Bank & Trust
Company,  N.A., 225 Franklin  Street,  Boston,  MA 02110,  currently serves as
custodian of the  Portfolio's  investments.  First  National Bank of Maryland,
25 South Charles  Street,  Baltimore,  Maryland 21203 also serves as custodian
of certain of the Portfolio's cash assets.  Neither  custodian has any part in
deciding  the  Portfolio's  investment  policies  or the choice of  securities
that are to be purchased or sold for the Portfolio.

METHOD OF DISTRIBUTION

         The  Portfolio  has entered into a principal  underwriting  agreement
with  Calvert  Distributors,  Inc.  ("CDI").  Pursuant to the  agreement,  CDI
serves as distributor and principal  underwriter for the Portfolio.  CDI bears
all its expenses of providing  services  pursuant to the agreement,  including
payment of any commissions and service fees.

CTFR Long-Term
Shares are offered at net asset value plus a front-end sales charge as
follows:

                           As a % of      As a % of    Allowed to
Amount of                  offering       net amount   Brokers as a %
Investment                 price          invested     of offering price
Less than $50,000          3.75%          3.90%           3.00%
$50,000 but
 less than $100,000        3.00%          3.09%           2.25%
$100,000 but
 less than $250,000        2.25%          2.30%           1.75%
$250,000 but
 less than $500,000        1.75%          1.78%           1.25%
$500,000 but
 less than $1,000,000      1.00%          1.01%           0.80%
$1,000,000 and over        0.00%          0.00%           0.00%

         CDI receives any front-end  sales charge.  A portion of the front-end
sales  charge may be  reallowed  to  dealers.  The  aggregate  amount of sales
charges (gross  underwriting  commissions)  and the net amount retained by CDI
(i.e., not reallowed to dealers) for the last 3 fiscal years are:

Fiscal Year                 1996                        1997
                    Gross           Net           Gross          Net
                    $36,198         $12,538       $35,466     $11,019

1998
Gross               Net
$44,897             $0

         Fund  Trustees and certain other  affiliated  persons of the Fund are
exempt  from the sales  charge  since the  distribution  costs are  minimal to
persons  already  familiar  with the Fund.  Other  groups  are  exempt  due to
economies of scale in distribution. See Exhibit A to the Prospectus.
         The  Portfolio's  Distribution  Plan  was  approved  by the  Board of
Trustees,  including  the  Trustees  who are not  "interested  persons" of the
Fund (as that term is defined in the  Investment  Company Act of 1940) and who
have no direct or indirect  financial  interest in the  operation  of the Plan
or in any  agreements  related to the Plan.  The selection  and  nomination of
the  Trustees who are not  interested  persons of the Fund is committed to the
discretion of such  disinterested  Trustees.  In  establishing  the Plan,  the
Trustees  considered  various factors including the amount of the distribution
fee. The Trustees  determined  that there is a reasonable  likelihood that the
Plan will benefit the Portfolio and its shareholders.
         The  Plan  may  be   terminated   by  vote  of  a  majority   of  the
non-interested  Trustees who have no direct or indirect  financial interest in
the  Plan  or  by  vote  of a  majority  of  the  outstanding  shares  of  the
Portfolio.  Any  change  in  the  Plan  that  would  materially  increase  the
distribution  cost to the Portfolio  requires  approval of the shareholders of
the  affected  class;  otherwise,  the Plan may be  amended  by the  Trustees,
including a majority of the non-interested Trustees as described above.
         The  Plan  will  continue  in  effect  indefinitely,  if  not  sooner
terminated in accordance  with its terms.  Thereafter,  the Plan will continue
in effect for  successive one year periods  provided that such  continuance is
annually  approved by (i) the vote of a majority of the  Trustees  who are not
parties  to the Plan or  interested  persons of any such party and who have no
direct or  indirect  financial  interest  in the Plan,  and (ii) the vote of a
majority of the entire Board of Trustees.
         Apart from the Plan,  the Advisor,  at its  expense,  may incur costs
and pay expenses associated with the distribution of shares of the Portfolio.
         CDI,  makes a  continuous  offering  of the  Fund's  securities  on a
"best efforts"  basis.  Under the terms of the  agreement,  CDI is entitled to
receive,  pursuant  to  the  Distribution  Plans,  a  distribution  fee  and a
service  fee from the  Fund  based on the  average  daily  net  assets  of the
Fund's.  These fees are paid  pursuant to the Fund's  Distribution  Plan.  The
Distribution  Plan  Expenses  (includes  both  distribution  fees and services
fees) paid by the Fund to CDI for the fiscal  year ended  December  31,  1998,
is as follows:

                           Distribution Plan Expenses
CTFR Long Term                      $49,798

         Of the  distribution  expenses  paid in fiscal year 1998,  the entire
amount  was  used  to   compensate   dealers  for  their  share   distribution
promotional services.

PORTFOLIO TRANSACTIONS

         Portfolio   transactions   are  undertaken  on  the  basis  of  their
desirability  from  an  investment   standpoint.   The  Fund's  Advisor  makes
investment  decisions  and  the  choice  of  brokers  and  dealers  under  the
direction and supervision of the Fund's Board of Trustees.
         Broker-dealers  who execute  portfolio  transactions on behalf of the
Fund are  selected  on the basis of their  execution  capability  and  trading
expertise  considering,  among other factors,  the overall  reasonableness  of
the brokerage commissions,  current market conditions,  size and timing of the
order, difficulty of execution, per share price, etc.

         For the last three fiscal years,  total  brokerage  commissions  paid
are as follows:

                               1996              1997         1998
         CTFR Long-Term        $0                $0           $0

         The  Fund  did  not  pay  any  brokerage  commissions  to  affiliated
persons during the last three fiscal years.

         While the Fund's  Advisor  select  brokers  primarily on the basis of
best  execution,  in some cases they may direct  transactions to brokers based
on the  quality  and  amount of the  research  and  research-related  services
which the brokers  provide to them.  These  services are of the type described
in  Section  28(e) of the  Securities  Exchange  Act of 1934  and may  include
analyses  of the  business  or  prospects  of a company,  industry or economic
sector,  or  statistical  and  pricing  services.  If, in the  judgment of the
Advisor,  the Fund or other  accounts  managed  by them will be  benefited  by
supplemental   research  services,   they  are  authorized  to  pay  brokerage
commissions  to a broker  furnishing  such  services  which  are in  excess of
commissions  which  another  broker may have  charged for  effecting  the same
transaction.  These  research  services  include  advice,  either  directly or
through  publications  or  writings,  as  to  the  value  of  securities,  the
advisability  of  investing  in,  purchasing  or selling  securities,  and the
availability   of  securities   or   purchasers  or  sellers  of   securities;
furnishing  of  analyses  and  reports  concerning   issuers,   securities  or
industries;  providing  information on economic factors and trends;  assisting
in  determining  portfolio  strategy;  providing  computer  software  used  in
security analyses;  providing portfolio  performance  evaluation and technical
market  analyses;  and providing  other  services  relevant to the  investment
decision  making  process.  It is the policy of the Advisor that such research
services  will be used for the  benefit  of the Fund as well as other  Calvert
Group funds and managed accounts.
         For the fiscal year ended  December 31, 1998,  the Fund,  through its
Advisor, paid $0 in commission for directed brokerage for research services.

         The Portfolio turnover rates for the last two fiscal years are as
follows:

                           1997                        1998
CTFR Long-Term             41%                         72%

GENERAL INFORMATION

         The Portfolio is an open-end,  non-diversified  investment management
investment  company.  It is a series of Calvert Tax-Free  Reserves,  which was
organized as a  Massachusetts  business  trust on October 20, 1980.  The other
series  of  the  Fund  include  the  Money  Market   Portfolio,   Limited-Term
Portfolio,  California  Money  Market  Portfolio,  and the  Vermont  Municipal
Portfolio.  The Fund's  Declaration of Trust contains an express disclaimer of
shareholder  liability for acts or obligations  of the Fund. The  shareholders
of  a   Massachusetts   business   trust   might,   however,   under   certain
circumstances,  be held  personally  liable as partners  for its  obligations.
The Declaration of Trust provides for  indemnification  and  reimbursement  of
expenses out of Fund assets for any  shareholder  held  personally  liable for
obligations  of the Fund.  The  Declaration  of Trust  provides  that the Fund
shall,  upon  request,  assume  the  defense  of any claim  made  against  any
shareholder  for any act or  obligation  of the Fund and satisfy any  judgment
thereon.  The  Declaration  of  Trust  further  provides  that  the  Fund  may
maintain appropriate  insurance (for example,  fidelity bonding and errors and
omissions  insurance)  for  the  protection  of the  Fund,  its  shareholders,
Trustees,  officers,  employees,  and agents to cover  possible tort and other
liabilities.  Thus,  the risk of a  shareholder  incurring  financial  loss on
account of  shareholder  liability is limited to  circumstances  in which both
inadequate  insurance  exists  and the  Fund  itself  is  unable  to meet  its
obligations.
         Each  share  of  each  series   represents  an  equal   proportionate
interest  in that  series  with  each  other  share  and is  entitled  to such
dividends  and  distributions  out of the income  belonging  to such series as
declared by the Board.  The Money Market  Portfolio offers Class O (offered in
the Calvert  Tax-Free  Reserves Money Market  Prospectus),  the  Institutional
Class  (offered  in a  separate  prospectus),  and Class T, also  known as The
Advisors Group Tax-Free Reserve Fund (offered in a separate prospectus).
         The Fund is not  required to hold annual  shareholder  meetings,  but
special  meetings  may  be  called  for  certain  purposes  such  as  electing
Trustees,  changing fundamental  policies, or approving a management contract.
As a shareholder, you receive one vote for each share you own.

CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES

         As of April 20, 1999, the following  shareholders  owned of record 5%
or more of the Fund:

         Name and Address                        % of Ownership

         John Swanson
         McMurray, Pennsylvania                  7.43%

         Harold or Laura Lustig
         Weston, Connecticut                     7.02%

                                   APPENDIX

Municipal Obligations
         Municipal   obligations  are  debt  obligations   issued  by  states,
cities,  municipalities,  and  their  agencies  to obtain  funds  for  various
public  purposes.  Such purposes  include the  construction of a wide range of
public  facilities,  the refunding of outstanding  obligations,  the obtaining
of funds for  general  operating  expenses,  and the lending of funds to other
public  institutions  and  facilities.  In addition,  certain types of private
activity  bonds are  issued by or on  behalf of public  authorities  to obtain
funds  for many  types of  local,  privately  operated  facilities.  Such debt
instruments  are  considered  municipal  obligations  if the interest  paid on
them is exempt from  federal  income tax in the opinion of bond counsel to the
issuer.  Although the  interest  paid on the  proceeds  from private  activity
bonds  used  for  the  construction,   equipment,  repair  or  improvement  of
privately  operated  industrial  or commercial  facilities  may be exempt from
federal income tax,  current  federal tax law places  substantial  limitations
on the size of such issues.
         Municipal  obligations  are generally  classified as either  "general
obligation" or "revenue"  bonds.  General  obligation bonds are secured by the
issuer's  pledge of its  faith,  credit and  taxing  power for the  payment of
principal  and interest.  Revenue bonds are payable from the revenues  derived
from a  particular  facility or class of  facilities  or, in some cases,  from
the  proceeds of a special  excise tax or other  specific  revenue  source but
not from the general taxing power.  Tax-exempt  private  activity bonds are in
most cases revenue  bonds and do not generally  carry the pledge of the credit
of  the  issuing  municipality.  There  are,  of  course,  variations  in  the
security of  municipal  obligations  both within a  particular  classification
and among classifications.
         Municipal  obligations are generally  traded on the basis of a quoted
yield  to  maturity,  and  the  price  of the  security  is  adjusted  so that
relative  to the stated  rate of  interest  it will  return the quoted rate to
the purchaser.
         Short-term  and  limited-term   municipal   obligations  include  Tax
Anticipation  Notes,  Revenue  Anticipation  Notes  Bond  Anticipation  Notes,
Construction   Loan  Notes,  and  Discount  Notes.  The  maturities  of  these
instruments  at the time of issue  generally  will range  between three months
and one year.  Pre-Refunded  Bonds with longer nominal maturities that are due
to be retired  with the  proceeds  of an escrowed  subsequent  issue at a date
within  one  year  and  three  years  of the  time  of  acquisition  are  also
considered short-term and limited-term municipal obligations.

Municipal Bond and Note Ratings
Description  of  Moody's  Investors  Service,  Inc.'s  ratings  of  state  and
municipal notes:
         Moody's  ratings for state and municipal  notes and other  short-term
obligations   are  designated   Moody's   Investment   Grade   ("MIG").   This
distinction is in recognition of the  differences  between  short-term  credit
risk and long-term risk.
         MIG 1:  Notes  bearing  this  designation  are of the  best  quality,
enjoying  strong  protection  from  established  cash flows of funds for their
servicing  or from  established  and  broad-based  access  to the  market  for
refinancing, or both.
         MIG2:  Notes  bearing  this  designation  are of high  quality,  with
margins of protection ample although not so large as in the preceding group.
         MIG3: Notes bearing this designation are of favorable  quality,  with
all security  elements  accounted for but lacking the  undeniable  strength of
the  preceding  grades.  Market  access for  refinancing,  in  particular,  is
likely to be less well established.
         MIG4:  Notes  bearing  this  designation  are  of  adequate  quality,
carrying  specific risk but having  protection  commonly  regarded as required
of an investment security and not distinctly or predominantly speculative.

Description of Moody's  Investors  Service  Inc.'s/Standard & Poor's municipal
bond ratings:
         Aaa/AAA:  Best  quality.  These  bonds carry the  smallest  degree of
investment  risk  and are  generally  referred  to as  "gilt  edge."  Interest
payments are  protected by a large or by an  exceptionally  stable  margin and
principal is secure.  This rating  indicates an extremely  strong  capacity to
pay principal and interest.
         Aa/AA:   Bonds   rated  AA  also   qualify   as   high-quality   debt
obligations.  Capacity to pay  principal  and interest is very strong,  and in
the  majority of instances  they differ from AAA issues only in small  degree.
They are rated lower than the best bonds  because  margins of  protection  may
not be as large as in Aaa securities,  fluctuation of protective  elements may
be of greater  amplitude,  or there may be other  elements  present which make
long-term risks appear somewhat larger than in Aaa securities.
         A/A:  Upper-medium  grade  obligations.  Factors  giving  security to
principal and interest are  considered  adequate,  but elements may be present
which  make the bond  somewhat  more  susceptible  to the  adverse  effects of
circumstances and economic conditions.
         Baa/BBB:   Medium  grade   obligations;   adequate  capacity  to  pay
principal and  interest.  Whereas they normally  exhibit  adequate  protection
parameters,  adverse economic  conditions or changing  circumstances  are more
likely to lead to a  weakened  capacity  to pay  principal  and  interest  for
bonds in this category than for bonds in the A category.
         Ba/BB,  B/B,  Caa/CCC,  Ca/CC:  Debt  rated  in these  categories  is
regarded  as  predominantly  speculative  with  respect  to  capacity  to  pay
interest  and repay  principal.  There  may be some  large  uncertainties  and
major  risk  exposure  to  adverse  conditions.   The  higher  the  degree  of
speculation, the lower the rating.
         C/C: This rating is only for no-interest income bonds.
         D: Debt in  default;  payment  of  interest  and/or  principal  is in
arrears.



                               LETTER OF INTENT

                           
Date

Calvert Distributors, Inc.
4550 Montgomery Avenue
Bethesda, MD 20814

Ladies and Gentlemen:

         By signing this Letter of Intent, or affirmatively marking the
Letter of Intent option on my Fund Account Application Form, I agree to be
bound by the terms and conditions applicable to Letters of Intent appearing
in the Prospectus and the Statement of Additional Information for the Fund
and the provisions described below as they may be amended from time to time
by the Fund. Such amendments will apply automatically to existing Letters of
Intent.

         I intend to invest in the shares of:_______________ Fund or
Portfolio name) during the thirteen (13) month period from the date of my
first purchase pursuant to this Letter (which cannot be more than ninety
(90) days prior to the date of this Letter or my Fund Account Application
Form, whichever is applicable), an aggregate amount (excluding any
reinvestments of distributions) of at least fifty thousand dollars ($50,000)
which, together with my current holdings of the Fund (at public offering
price on date of this Letter or my Fund Account Application Form, whichever
is applicable), will equal or exceed the amount checked below:

         __ $50,000 __ $100,000 __ $250,000 __ $500,000
         __ $1,000,000

         Subject to the conditions specified below, including the terms of
escrow, to which I hereby agree, each purchase occurring after the date of
this Letter will be made at the public offering price applicable to a single
transaction of the dollar amount specified above, as described in the Fund's
prospectus. "Fund" in this Letter of Intent shall refer to the Fund or
Portfolio, as the case may be. No portion of the sales charge imposed on
purchases made prior to the date of this Letter will be refunded.

         I am making no commitment to purchase shares, but if my purchases
within thirteen months from the date of my first purchase do not aggregate
the minimum amount specified above, I will pay the increased amount of sales
charges prescribed in the terms of escrow described below. I understand that
4.75% of the minimum dollar amount specified above will be held in escrow in
the form of shares (computed to the nearest full share). These shares will
be held subject to the terms of escrow described below.

         From the initial purchase (or subsequent purchases if necessary),
4.75% of the dollar amount specified in this Letter shall be held in escrow
in shares of the Fund by the Fund's transfer agent. For example, if the
minimum amount specified under the Letter is $50,000, the escrow shall be
shares valued in the amount of $2,375 (computed at the public offering price
adjusted for a $50,000 purchase). All dividends and any capital gains
distribution on the escrowed shares will be credited to my account.

         If the total minimum investment specified under the Letter is
completed within a thirteen month period, escrowed shares will be promptly
released to me. However, shares disposed of prior to completion of the
purchase requirement under the Letter will be deducted from the amount
required to complete the investment commitment.

         Upon expiration of this Letter, the total purchases pursuant to the
Letter are less than the amount specified in the Letter as the intended
aggregate purchases, Calvert Distributors, Inc. ("CDI") will bill me for an
amount equal to the difference between the lower load I paid and the dollar
amount of sales charges which I would have paid if the total amount
purchased had been made at a single time. If not paid by the investor within
20 days, CDI will debit the difference from my account. Full shares, if any,
remaining in escrow after the aforementioned adjustment will be released
and, upon request, remitted to me.

         I irrevocably constitute and appoint CDI as my attorney-in-fact,
with full power of substitution, to surrender for redemption any or all
escrowed shares on the books of the Fund. This power of attorney is coupled
with an interest.

         The commission allowed by CDI to the broker-dealer named herein
shall be at the rate applicable to the minimum amount of my specified
intended purchases.

         The Letter may be revised upward by me at any time during the
thirteen-month period, and such a revision will be treated as a new Letter,
except that the thirteen-month period during which the purchase must be made
will remain unchanged and there will be no retroactive reduction of the
sales charges paid on prior purchases.

         In determining the total amount of purchases made hereunder, shares
disposed of prior to termination of this Letter will be deducted. My
broker-dealer shall refer to this Letter of Intent in placing any future
purchase orders for me while this Letter is in effect.


                                                     
Dealer

                                                     
Name of Investor(s)

By                                                   
     Authorized Signer

                                                     
Address

                                                     
Signature of Investor(s)

                                                     
Date

                                                     
Signature of Investor(s)

                                                     
Date

<PAGE>

CALVERT TAX-FREE RESERVES
California Money Market Portfolio
4550 Montgomery Avenue, Bethesda, Maryland 20814

Statement of Additional Information
                                April 30, 1999


TABLE OF CONTENTS

Investment Policies                                            1
Investment Restrictions                                        3
Purchases and Redemptions of Shares                            4
Dividends and Distributions                                    4
Tax Matters                                                    4
Valuation of Shares                                            5
Calculation of Yield                                           5
Advertising                                                    5
Trustees and Officers                                          6
Investment Advisor                                             8
Administrative Services                                        9
Transfer and Shareholder Servicing Agents                      9
Independent Accountants and Custodians                         9
Method of Distribution                                         9
Portfolio Transactions                                         9
General Information                                           10
Control Persons and Principal Holders of Securities           10
Appendix                                                      10

New Account Information
         (800) 368-2748
         (301) 951-4820

Shareholder Services
         (800) 368-2745

Broker Services
         (800) 368-2746
         (301) 951-4850

TDD for the Hearing- Impaired
         (800) 541-1524

         This  Statement  of  Additional  Information  is  not  a  prospectus.
Investors  should read the Statement of Additional  Information in conjunction
with the Portfolio's  Prospectus,  dated April 30, 1999, which may be obtained
free of charge  by  writing  the Fund at the  above  address  or  calling  the
telephone numbers listed above.

         The audited  financial  statements in the  Portfolio's  Annual Report
to  Shareholders  dated  December  31, 1998,  are  expressly  incorporated  by
reference  and made a part of this  Statement  of  Additional  Information.  A
copy of the  Annual  Report  may be  obtained  free of  charge by  writing  or
calling the Portfolio.

INVESTMENT POLICIES

         The  Portfolio  invests  primarily  in  a  diversified  portfolio  of
municipal  obligations  whose  interest is exempt from federal and  California
State Income Tax.  Municipal  obligations  in which the Portfolio  invests are
short-term,  fixed and variable rate  instruments  of minimal  credit risk and
of  high  quality.   The  investment   objective  may  only  be  changed  with
shareholder approval.
         Under normal  market  conditions,  the  Portfolio  attempts to invest
100%,  and will invest at least 80%, of its total  assets in debt  obligations
issued  by or  on  behalf  of  the  State  of  California  and  its  political
subdivisions  ("California  Municipal  Obligations").  Dividends  paid  by the
Portfolio   which  are  derived  from  interest   attributable  to  California
Municipal  Obligations  will be  exempt  from  federal  and  California  State
Income Taxes.  Dividends  derived from interest on tax-exempt  obligations  of
other  governmental  issuers will be exempt from federal  income tax, but will
be subject to California state income taxes.
         The credit  rating of the  Portfolio's  assets as of its most  recent
fiscal  year-end  appears in the Annual Report to  Shareholders,  incorporated
by reference herein.

Variable Rate OBLIGATIONS AND Demand Notes
         The  Portfolio  may invest in  variable  rate  obligations.  Variable
rate obligations have a yield that is adjusted  periodically  based on changes
in the level of prevailing  interest rates.  Floating rate obligations have an
interest rate fixed to a known lending rate,  such as the prime rate,  and are
automatically   adjusted   when  the  known  rate   changes.   Variable   rate
obligations lessen the capital  fluctuations  usually inherent in fixed income
investments.  This  diminishes the risk of capital  depreciation of investment
securities in a Portfolio and,  consequently,  of Portfolio  shares.  However,
if interest rates decline,  the yield of the invested  Portfolio will decline,
causing the  Portfolio  and its  shareholders  to forego the  opportunity  for
capital appreciation of the Portfolio's investments and of their shares.
         The  Portfolio  may invest in floating  rate and variable rate demand
notes.  Demand notes  provide  that the holder may demand  payment of the note
at its par value plus  accrued  interest by giving  notice to the  issuer.  To
ensure the ability of the issuer to make  payment on demand,  a bank letter of
credit or other liquidity facility may support the note.
         The Board of  Trustees  has  approved  investments  in  floating  and
variable  rate demand notes upon the following  conditions:  the Portfolio has
right of demand,  upon notice not to exceed  thirty  days,  against the issuer
to  receive  payment;  the  issuer  will be able to  make  payment  upon  such
demand,  either from its own  resources or through an  unqualified  commitment
from a third party;  and the rate of interest  payable is calculated to ensure
that  the  market  value  of such  notes  will  approximate  par  value on the
adjustment  dates.  The remaining  maturity of such demand notes is deemed the
period  remaining  until such time as the  Portfolio can recover the principal
on demand.

Obligations with Puts Attached
         The Portfolio  has authority to purchase  securities at a price which
would result in a yield to maturity lower than that  generally  offered by the
seller  at the time of  purchase  when it can  acquire  at the  same  time the
right to sell the  securities  back to the  seller at an agreed  upon price at
any  time  during  a  stated  period  or on a  certain  date.  Such a right is
generally denoted as a "put."  Unconditional  puts are readily  exercisable in
the event of a default in payment of principal  or interest on the  underlying
securities.  The  Portfolio  must limit its portfolio  investments,  including
puts,  to   instruments   of  high  quality  as  determined  by  a  nationally
recognized statistical rating organization.

Temporary Investments
         Short-term money market type investments  consist of:  obligations of
the U.S.  Government,  its agencies  and  instrumentalities;  certificates  of
deposit  of banks  with  assets of one  billion  dollars  or more;  commercial
paper or other  corporate notes of investment  grade quality;  and any of such
items subject to short-term repurchase agreements.
         The   Portfolio   intends  to   minimize   taxable   income   through
investment,  when possible, in short-term tax-exempt  securities.  To minimize
taxable income, the Portfolio may also hold cash which is not earning income.

Repurchase Agreements
         The  Portfolio  may purchase  debt  securities  subject to repurchase
agreements,   which  are  arrangements   under  which  the  Portfolio  buys  a
security,  and the seller  simultaneously agrees to repurchase the security at
a  specified  time  and  price  reflecting  a  market  rate of  interest.  The
Portfolio  engages in repurchase  agreements in order to earn a higher rate of
return than it could earn simply by investing in the  obligation  which is the
subject of the repurchase  agreement.  Repurchase agreements are not, however,
without  risk.  In the event of the  bankruptcy of a seller during the term of
a repurchase  agreement,  a legal question  exists as to whether the Portfolio
would be deemed the owner of the  underlying  security or would be deemed only
to have a security  interest  in and lien upon such  security.  The  Portfolio
will only engage in repurchase  agreements with recognized  securities dealers
and banks  determined to present  minimal credit risk by the Advisor under the
direction and supervision of the Portfolio's  Board of Trustees.  In addition,
the Portfolio will only engage in repurchase  agreements  reasonably  designed
to secure fully during the term of the  agreement  the seller's  obligation to
repurchase  the  underlying  security and will monitor the market value of the
underlying  security  during  the term of the  agreement.  If the value of the
underlying  security  declines  and is not at least  equal  to the  repurchase
price  due  the  Portfolio  pursuant  to the  agreement,  the  Portfolio  will
require  the  seller to pledge  additional  securities  or cash to secure  the
seller's  obligations  pursuant to the  agreement.  If the seller  defaults on
its  obligation  to  repurchase  and  the  value  of the  underlying  security
declines,  the  Portfolio  may incur a loss and may incur  expenses in selling
the  underlying  security.  Repurchase  agreements  are always for  periods of
less than one year.  Repurchase  agreements not  terminable  within seven days
are considered illiquid.

Reverse Repurchase Agreements
         The  Portfolio  may also  engage in  reverse  repurchase  agreements.
Under a reverse  repurchase  agreement,  the Portfolio  sells  securities to a
bank or  securities  dealer and agrees to  repurchase  those  securities  from
such  party at an  agreed  upon  date and price  reflecting  a market  rate of
interest.  The  Portfolio  invests the proceeds  from each reverse  repurchase
agreement in  obligations  in which it is authorized to invest.  The Portfolio
intends to enter into a reverse  repurchase  agreement  only when the interest
income  provided  for in the  obligation  in which the  Portfolio  invests the
proceeds is expected to exceed the amount the  Portfolio  will pay in interest
to the  other  party to the  agreement  plus  all  costs  associated  with the
transactions.  The Portfolio does not intend to borrow for leverage  purposes.
The  Portfolio  will  only  be  permitted  to  pledge  assets  to  the  extent
necessary to secure borrowings and reverse repurchase agreements.
         During the time a reverse  repurchase  agreement is outstanding,  the
Portfolio  will  maintain  in a  segregated  account  an  amount  of cash,  US
Government  securities or other liquid,  high-quality debt securities equal in
value to the  repurchase  price.  The Portfolio  will mark to market the value
of assets held in the segregated  account,  and will place  additional  assets
in the  account  whenever  the  total  value of the  account  falls  below the
amount required under applicable regulations.
         The Portfolio's  use of reverse  repurchase  agreements  involves the
risk  that  the  other  party  to  the  agreements  could  become  subject  to
bankruptcy or  liquidation  proceedings  during the period the  agreements are
outstanding.  In such event,  the Portfolio may not be able to repurchase  the
securities it has sold to that other party. Under those  circumstances,  if at
the  expiration of the  agreement  such  securities  are of greater value than
the proceeds  obtained by the Portfolio  under the  agreements,  the Portfolio
may have been better off had it not entered into the agreement.  However,  the
Portfolio will enter into reverse  repurchase  agreements  only with banks and
dealers  which  the  Advisor  believes  present  minimal  credit  risks  under
guidelines  adopted by the  Portfolio's  Board of Trustees.  In addition,  the
Portfolio  bears the risk that the market value of the  securities it sold may
decline below the agreed-upon  repurchase  price, in which case the dealer may
request the Portfolio to post additional collateral.

INVESTMENT RESTRICTIONS

Fundamental Investment Restrictions
         The  Portfolio  has  adopted  the  following  fundamental  investment
restrictions.  These  restrictions  cannot be changed  without the approval of
the holders of a majority of the outstanding shares of the Portfolio.

         (1) The Portfolio may not make any  investment  inconsistent
         with  its   classification   as  a  diversified   investment
         company under the 1940 Act.
         (2) The Portfolio may not  concentrate  its  investments  in
         the   securities  of  issuers   primarily   engaged  in  any
         particular   industry  (other  than  securities   issued  or
         guaranteed  by  the  U.S.  Government  or  its  agencies  or
         instrumentalities    and   repurchase   agreements   secured
         thereby, or domestic bank money market instruments.)
         (3)  The  Portfolio  may  not  issue  senior  securities  or
         borrow  money,  except from banks for temporary or emergency
         purposes  and then  only in an  amount  up to 33 1/3% of the
         value  of its  total  assets  or as  permitted  by  law  and
         except by engaging in reverse repurchase  agreements,  where
         allowed.  In order to secure any  permitted  borrowings  and
         reverse  repurchase   agreements  under  this  section,  the
         Portfolio may pledge, mortgage or hypothecate its assets.
         (4) The  Portfolio  may not  underwrite  the  securities  of
         other  issuers,  except as  allowed  by law or to the extent
         that the purchase of  municipal  obligations  in  accordance
         with  its   investment   objective  and   policies,   either
         directly  from the  issuer,  or from an  underwriter  for an
         issuer, may be deemed an underwriting.
         (5) The  Portfolio  may not invest  directly in  commodities
         or real estate,  although it may invest in securities  which
         are  secured by real  estate or real  estate  mortgages  and
         securities of issuers  which invest or deal in  commodities,
         commodity futures, real estate or real estate mortgages.
         (6) The  Portfolio  may not make loans,  other than  through
         the  purchase of money  market  instruments  and  repurchase
         agreements  or by  the  purchase  of  bonds,  debentures  or
         other  debt   securities,   or  as  permitted  by  law.  The
         purchase  of all or a  portion  of an issue of  publicly  or
         privately  distributed  debt  obligations in accordance with
         its investment objective,  policies and restrictions,  shall
         not constitute the making of a loan.

Nonfundamental Investment Restrictions
         The  Board of  Trustees  has  adopted  the  following  nonfundamental
investment  restrictions.  A  nonfundamental  investment  restriction  can  be
changed by the Board at any time without a shareholder vote.

         (1)  The   Portfolio   may  not  purchase   common   stocks,
         preferred stocks, warrants, or other equity securities.
         (2) The  Portfolio  does not intend to make any purchases of
         securities if borrowing exceeds 5% of its total assets.
         (3) The Portfolio may not sell  securities  short,  purchase
         securities  on  margin,  or  write or  purchase  put or call
         options.  The  Portfolio  reserves  the  right  to  purchase
         securities with puts attached or with demand features.
         (4) The  Portfolio may not purchase  illiquid  securities if
         more than 10% of the  value of the  Portfolio's  net  assets
         would be invested in such securities.


PURCHASES AND REDEMPTIONS OF SHARES

         Share  certificates  will not be issued  unless  requested in writing
by the investor.  No charge will be made for share  certificate  requests.  No
certificates will be issued for fractional shares.
         Shareholders   wishing  to  use  the  draft  writing  service  should
complete the signature  card enclosed with the  Investment  Application.  This
draft writing  service will be subject to the customary  rules and regulations
governing  checking  accounts,  and the Portfolio reserves the right to change
or  suspend  the  service.  Generally,  there  is no  charge  to you  for  the
maintenance  of this  service or the  clearance of drafts,  but the  Portfolio
reserves  the  right  to  charge  a  service  fee  for  drafts   returned  for
uncollected or insufficient  funds, and will charge $25 for stop payments.  As
a service to  shareholders,  the Fund may  automatically  transfer  the dollar
amount  necessary  to cover  drafts you have  written on the Fund to your Fund
account  from any other of your  identically  registered  accounts  in Calvert
money  market  funds or Calvert  Insured  Plus.  The Fund may charge a fee for
this service.
         When a payable  through draft is presented for payment,  a sufficient
number of full and fractional shares from the  shareholder's  account to cover
the  amount  of the  draft  will be  redeemed  at the  net  asset  value  next
determined.  If there are insufficient  shares in the  shareholder's  account,
the draft will be returned.  Drafts  presented  to the bank for payment  which
would  require  the  redemption  of shares  purchased  by check or  electronic
funds transfer within the previous 10 business days may not be honored.
         Amounts  redeemed by check  redemption  may be mailed to the investor
without  charge.  Amounts of up to $300,000 may be transferred  electronically
at no charge to the  investor.  Amounts of $1,000 or more will be  transmitted
by wire,  without charge, to the investor's  account at a domestic  commercial
bank  that is a member of the  Federal  Reserve  System or to a  correspondent
bank.  A charge of $5 is imposed on wire  transfers  of less than  $1,000.  If
the  investor's  bank is not a  Federal  Reserve  System  member,  failure  of
immediate  notification  to that bank by the  correspondent  bank could result
in a delay in crediting the funds to the investor's bank account.
         Telephone  redemption  requests which would require the redemption of
shares  purchased by check or electronic  funds  transfer  within the previous
10 business  days may not be honored.  The Fund  reserves  the right to modify
the telephone redemption privilege.
          To change redemption  instructions already given,  shareholders must
send a written  notice to Calvert  Group,  P.O. Box 419544,  Kansas  City,  MO
64141-6544,  with a voided  copy of a check for the bank  wiring  instructions
to be added.  If a voided  check  does not  accompany  the  request,  then the
request must be signature  guaranteed by a commercial  bank,  savings and loan
association,  trust company,  member firm of any national securities exchange,
or  certain  credit  unions.   Further  documentation  may  be  required  from
corporations, fiduciaries, and institutional investors.
         The  right of  redemption  may be  suspended  or the date of  payment
postponed  for any period  during which the New York Stock  Exchange is closed
(other than customary weekend and holiday  closings),  when trading on the New
York Stock Exchange is restricted,  or an emergency  exists,  as determined by
the  SEC,  or if  the  Commission  has  ordered  such  a  suspension  for  the
protection of shareholders.  Redemption  proceeds are normally mailed or wired
the next  business day after a proper  redemption  request has been  received,
unless redemptions have been suspended or postponed as described above.

DIVIDENDS AND DISTRIBUTIONS

         Dividends from the  Portfolio's  net  investment  income are declared
daily  and paid  monthly.  Net  investment  income  consists  of the  interest
income earned on  investments  (adjusted for  amortization  of original  issue
discounts or premiums or market premiums),  less estimated  expenses.  Capital
gains,  if any,  are  normally  paid  once a year  and  will be  automatically
reinvested  at net  asset  value  in  additional  shares.  Dividends  and  any
distributions are  automatically  reinvested in additional shares of the Fund,
unless you elect to have the  dividends  of $10 or more paid in cash (by check
or by Calvert Money  Controller).  You may also request to have your dividends
and distributions  from the Portfolio  invested in shares of any other Calvert
Group Fund, at no additional charge.
         Purchasers   of  shares  of  the  Portfolio   will  begin   receiving
dividends  upon  the  date  federal  funds  are  received  by  the  Portfolio.
Purchases by bank wire  received by 12:30 p.m.,  Eastern time are  immediately
available  federal  funds;  purchases  by  domestic  check may take one day to
convert  into  federal  funds.  Shareholders  redeeming  shares by  telephone,
electronic funds transfer,  or written request will receive  dividends through
the date that the  redemption  request is  processed;  shareholders  redeeming
shares  by  draft  will  receive  dividends  up to  the  date  such  draft  is
presented to the Portfolio for payment.

TAX MATTERS

         The Fund  intends to  continue  to qualify  as  regulated  investment
companies  under  Subchapter M of the Internal  Revenue Code ("Code").  If for
any  reason  the  Fund  should  fail  to  qualify,  it  would  be  taxed  as a
corporation  at the Fund  level,  rather than  passing  through its income and
gains to shareholders.
         The  Portfolio's   dividends  of  net  investment  income  constitute
exempt-interest  dividends on which  shareholders are not generally subject to
federal  income tax; in  addition,  to the extent  that income  dividends  are
derived from  earnings  attributable  to  obligations  of  California  and its
political  subdivisions,  they  will  also be  exempt  from  state  and  local
personal income tax in California.
         However,  under  the  Act,  dividends  attributable  to  interest  on
certain  private  activity  bonds  must be  included  in  federal  alternative
minimum  taxable income for the purpose of determining  liability (if any) for
individuals  and for  corporations.  The  Portfolio's  dividends  derived from
taxable interest and  distributions of net short-term  capital gains,  whether
taken  in  cash  or   reinvested  in   additional   shares,   are  taxable  to
shareholders  as  ordinary  income  and  do  not  qualify  for  the  dividends
received deduction for corporations.
         The  Code  provides  that  interest  on   indebtedness   incurred  or
continued  in order to  purchase  or carry  shares of a  regulated  investment
company which  distributes  exempt-interest  dividends  during the year is not
deductible.  Furthermore,  entities or persons who are "substantial users" (or
persons  related to  "substantial  users") of  facilities  financed by private
activity bonds should consult their tax advisors before  purchasing  shares of
the  Portfolio.  "Substantial  user"  is  generally  defined  as  including  a
"non-exempt  person"  who  regularly  uses in  trade or  business  a part of a
facility financed from the proceeds of private activity bonds.

VALUATION OF SHARES

         The   Portfolio's   assets,   including   commitments   to   purchase
securities  on a when-issued  basis,  are normally  valued at their  amortized
cost,  which does not take into account  unrealized  capital  gains or losses.
This  involves  valuing an instrument  at its cost and  thereafter  assuming a
constant  amortization  to maturity of any discount or premium,  regardless of
the  impact  of  fluctuating  interest  rates  on  the  market  value  of  the
instrument.  While this method provides certainty in valuation,  it may result
in periods during which value,  as determined by amortized  cost, is higher or
lower than the price that would be received upon sale of the instrument.
         The  Portfolio  determines  the net asset  value of its shares  every
business  day at the  close  of the  regular  session  of the New  York  stock
exchange  (generally,  4:00 p.m. Eastern time), and at such other times as may
be  necessary or  appropriate.  The  Portfolio  does not  determine  net asset
value on certain  national  holidays or other days on which the New York Stock
Exchange is closed:  New Year's Day, Martin Luther King Day,  Presidents' Day,
Good Friday,  Memorial Day,  Independence  Day, Labor Day,  Thanksgiving  Day,
and Christmas Day.

Net Asset Value and Offering Price Per Share, 12/31/98
         $437,575,246/437,673,084 shares                      $1.00

CALCULATION OF YIELD

         From  time  to  time  the  Portfolio   advertises   its  "yield"  and
"effective  yield." Both yield  figures are based on  historical  earnings and
are  not  intended  to  indicate  future  performance.   The  "yield"  of  the
Portfolio  refers to the income  generated by an  investment  in the Portfolio
over a  particular  base period of time.  The length and  closing  date of the
base  period will be stated in the  advertisement.  If the base period is less
than one  year,  the  yield is then  "annualized."  That is,  the net  change,
exclusive of capital  changes,  in the value of a share during the base period
is divided by the net asset  value per share at the  beginning  of the period,
and the result is  multiplied  by 365 and divided by the number of days in the
base period.  Capital changes  excluded from the calculation of yield are: (1)
realized  gains and losses  from the sale of  securities,  and (2)  unrealized
appreciation  and  depreciation.  The  Portfolio's  "effective  yield"  for  a
seven-day  period  is its  annualized  compounded  yield  during  the  period,
calculated according to the following formula:
Effective yield = (base period return + 1)365/7 -1
For the  seven-day  period ended  December  31, 1998,  the yield was 3.18% and
its effective yield 3.23%.
         The  Portfolio  also  may  advertise,  from  time to  time,  its "tax
equivalent  yield." The tax  equivalent  yield is the yield an investor  would
be  required  to obtain  from  taxable  investments  to equal the  Portfolio's
yield,  all or a portion of which may be exempt  from  federal  income  taxes.
The  tax   equivalent   yield  is  computed  by  taking  the  portion  of  the
Portfolio's  effective  yield exempt from federal income taxes and multiplying
the  exempt  yield by a factor  based  upon a stated  income  tax  rate,  then
adding  the  portion  of the yield  that is not  exempt  from  federal  income
taxes.  The factor which is used to calculate the tax equivalent  yield is the
reciprocal of the difference  between 1 and the  applicable  income tax rates,
which will be stated in the  advertisement.  For the  seven-day  period  ended
December 31,  1998,  the federal tax  equivalent  yield for an investor in the
36% income tax bracket  was 5.05%,  and 5.35% for an investor in the 39.6% tax
bracket.

                                 ADVERTISING

         The Fund or its affiliates may provide  information  such as, but not
limited  to,  the  economy,   investment   climate,   investment   principles,
sociological  conditions  and  political  ambiance.   Discussion  may  include
hypothetical  scenarios  or  lists of  relevant  factors  designed  to aid the
investor in  determining  whether the Fund is compatible  with the  investor's
goals.  The Fund may list  portfolio  holdings or give  examples or securities
that may have been  considered  for inclusion in the  Portfolio,  whether held
or not.
         The Fund or its affiliates may supply  comparative  performance  data
and rankings from  independent  sources such as Donoghue's  Money Fund Report,
Bank Rate Monitor,  Money,  Forbes,  Lipper  Analytical  Services,  Inc.,  CDA
Investment  Technologies,  Inc.,  Wiesenberger  Investment  Companies Service,
Russell  2000/Small  Stock  Index,  Mutual  Fund Values  Morningstar  Ratings,
Mutual Fund  Forecaster,  Barron's,  The Wall Street  Journal,  and Schabacker
Investment  Management,  Inc.  Such  averages  generally  do not  reflect  any
front-  or  back-end  sales  charges  that  may be  charged  by  Funds in that
grouping.  The Fund may also cite to any source,  whether in print or on-line,
such as Bloomberg,  in order to acknowledge  origin of  information.  The Fund
may compare  itself or its portfolio  holdings to other  investments,  whether
or not issued or  regulated by the  securities  industry,  including,  but not
limited  to,  certificates  of  deposit  and  Treasury  notes.  The Fund,  its
Advisor,  and its affiliates reserve the right to update performance  rankings
as new rankings become available.
         Calvert   Group  is  the   nation's   leading   family  of   socially
responsible  mutual funds, both in terms of socially  responsible  mutual fund
assets  under  management,  and number of  socially  responsible  mutual  fund
portfolios  offered  (source:  Social  Investment  Forum,  December 31, 1998).
Calvert  Group was also the first to offer a family  of  socially  responsible
mutual fund portfolios.

TRUSTEES AND OFFICERS

         The Fund's Board of Trustees supervises the Fund's activities and
reviews its contracts with companies that provide it with services.
         RICHARD  L.  BAIRD,  JR.,  Trustee.   Mr.  Baird  is  Executive  Vice
President for the Family Health Council, Inc. in Pittsburgh,  Pennsylvania,  a
non-profit  corporation  which provides family planning  services,  nutrition,
maternal/child  health care, and various health screening services.  Mr. Baird
is a  trustee/director  of each of the  investment  companies  in the  Calvert
Group of Funds,  except for Calvert Variable Series,  Inc.,  Calvert New World
Fund, Inc. and Calvert World Values Fund,  Inc. DOB:  05/09/48.  Address:  211
Overlook Drive, Pittsburgh, Pennsylvania 15216.
         FRANK H. BLATZ,  JR.,  Esq.,  Trustee.  Mr. Blatz is a partner in the
law firm of Snevily,  Ely,  Williams & Blatz.  He was  formerly a partner with
Abrams,  Blatz,  Gran,  Hendricks  &  Reina,  P.A.  He is also a  director  of
Calvert Variable Series, Inc. DOB: 10/29/35.  Address:  308 East Broad Street,
Westfield, New Jersey 07091.
         FREDERICK T. BORTS, M.D., Trustee. Dr. Borts is a radiologist with
Kaiser Permanente. Prior to that, he was a radiologist at Bethlehem Medical
Imaging in Allentown, Pennsylvania. DOB: 07/23/49. Address: 16 Iliahi
Street, Honolulu, Hawaii, 96817.
         CHARLES E. DIEHL,  Trustee.  Mr. Diehl is a self-employed  consultant
and  is  Vice  President  and  Treasurer  Emeritus  of the  George  Washington
University.   He  has  retired  from  University  Support  Services,  Inc.  of
Herndon,  Virginia.  Formerly,  he  was  a  Director  of  Acacia  Mutual  Life
Insurance   Company,   and  is  currently  a  Director  of  Servus   Financial
Corporation.   DOB:  10/13/22.  Address:  1658  Quail  Hollow  Court,  McLean,
Virginia 22101.
         DOUGLAS E. FELDMAN,  M.D.,  Trustee.  Dr. Feldman is managing partner
of  Feldman  Otolaryngology,  Head and Neck  Surgery  in  Washington,  D.C.  A
graduate  of  Harvard   Medical   School,   he  is   Associate   Professor  of
Otolaryngology,  Head and Neck  Surgery at  Georgetown  University  and George
Washington  University  Medical School, and past Chairman of the Department of
Otolaryngology,  Head and Neck Surgery at the Washington  Hospital Center.  He
is  included in The Best  Doctors in America.  DOB:  05/23/48.  Address:  7536
Pepperell Drive, Bethesda, Maryland 20817.
         PETER W. GAVIAN,  CFA, Trustee.  Mr. Gavian is President of Corporate
Finance of  Washington,  Inc.  Formerly,  he was a principal of Gavian De Vaux
Associates,  an  investment  banking  firm.  He is also a Chartered  Financial
Analyst and an accredited senior business appraiser.  DOB: 12/08/32.  Address:
3005 Franklin Road North, Arlington, Virginia 22201.
         JOHN G. GUFFEY,  JR., Trustee.  Mr. Guffey is organizing  director of
the Community Capital Bank in Brooklyn,  New York, and a financial  consultant
to various  organizations.  In  addition,  he is a director  of the  Community
Bankers Mutual Fund of Denver,  Colorado,  a director of Ariel Funds,  and the
Treasurer  and Director of Silby,  Guffey,  and Co.,  Inc., a venture  capital
firm.  Mr.  Guffey  is a  trustee/director  of  each of the  other  investment
companies in the Calvert Group of Funds,  except for Calvert  Variable Series,
Inc. and Calvert New World Fund, Inc.
        Mr.  Guffey  has  been  advised  that  the   Securities  and  Exchange
Commission  ("SEC")  has entered an order  against him  relating to his former
service as a director of  Community  Bankers  Mutual Fund,  Inc.  This fund is
not  connected  with  any  Calvert  Fund  or  the  Calvert  Group  and  ceased
operations  in  September,  1994.  Mr.  Guffey  consented  to the entry of the
order  without  admitting  or denying  the  findings  in the order.  The order
contains  findings (1) that the Community  Bankers  Mutual  Fund's  prospectus
and statement of additional  information  were materially false and misleading
because  they  misstated  or failed to state  material  facts  concerning  the
pricing of fund  shares  and the  percentage  of  illiquid  securities  in the
fund's  portfolio  and  that Mr.  Guffey,  as a member  of the  fund's  board,
should  have  known  of  these   misstatements  and  therefore   violated  the
Securities  Act of 1933;  (2) that the price of the fund's  shares sold to the
public  was not  based  on the  current  net  asset  value of the  shares,  in
violation  of the  Investment  Company  Act of 1940 (the  "Investment  Company
Act");  and (3) that the board of the fund,  including  Mr.  Guffey,  violated
the  Investment  Company Act by  directing  the filing of a  materially  false
registration  statement.  The order  directed  Mr.  Guffey to cease and desist
from  committing or causing  future  violations  and to pay a civil penalty of
$5,000.  The SEC placed no restrictions  on Mr.  Guffey's  continuing to serve
as a Trustee or Director of mutual funds. DOB:  05/15/48.  Address:  388 Calli
Calina, Santa Fe, New Mexico 87501.
         *BARBARA J. KRUMSIEK,  President and Trustee.  Ms. Krumsiek serves as
President,  Chief Executive  Officer and Vice Chairman of Calvert Group,  Ltd.
and as an officer and director of each of its affiliated  companies.  She is a
director of Calvert-Sloan  Advisers,  L.L.C., and a  trustee/director  of each
of the  investment  companies in the Calvert Group of Funds.  Ms.  Krumsiek is
the President of each of the investment  companies,  except for Calvert Social
Investment  Fund, of which she is the Senior Vice President.  Prior to joining
Calvert Group,  Ms.  Krumsiek  served as a Managing  Director of Alliance Fund
Distributors, Inc. DOB: 08/09/52.
         M. CHARITO  KRUVANT,  Trustee.  Ms.  Kruvant is President  and CEO of
Creative  Associates  International,  Inc., a firm that  specializes  in human
resources  development,  information  management,  public  affairs and private
enterprise  development.  She is also a Director of Calvert  Variable  Series,
Inc.,  and  Acacia  Federal  Savings  Bank.  DOB:  12/08/45.   Address:   5301
Wisconsin Avenue, N.W., Washington, D.C. 20015.
         ARTHUR J. PUGH,  Trustee.  Mr. Pugh is a Director of Calvert Variable
Series,  Inc., and serves as a director of Acacia Federal  Savings Bank.  DOB:
09/24/37. Address: 4823 Prestwick Drive, Fairfax, Virginia 22030.
         *DAVID R. ROCHAT,  Senior Vice  President and Trustee.  Mr. Rochat is
Executive Vice President of Calvert Asset Management  Company,  Inc., Director
and Secretary of Grady,  Berwald and Co.,  Inc., and Director and President of
Chelsea  Securities,  Inc. He is the Senior Vice  President of First  Variable
Rate Fund,  Calvert Tax-Free  Reserves,  Calvert Municipal Fund, Inc., Calvert
Cash  Reserves,  and  The  Calvert  Fund.  DOB:  10/07/37.  Address:  Box  93,
Chelsea, Vermont 05038.
         *D. WAYNE SILBY, Esq.,  Trustee.  Mr. Silby is a trustee/director  of
each of the  investment  companies in the Calvert  Group of Funds,  except for
Calvert  Variable  Series,  Inc.  and  Calvert New World  Fund.  Mr.  Silby is
Executive  Chairman  of Group  Serve,  Inc.,  an internet  company  focused on
community  building   collaborative  tools,  and  an  officer,   director  and
shareholder  of  Silby,  Guffey &  Company,  Inc.,  which  serves  as  general
partner  of  Calvert  Social  Venture  Partners  ("CSVP").  CSVP is a  venture
capital firm investing in socially  responsible small companies.  He is also a
Director of Acacia Mutual Life  Insurance  Company.  DOB:  07/20/48.  Address:
1715 18th Street, N.W., Washington, D.C. 20009.
         RENO J. MARTINI,  Senior Vice  President.  Mr.  Martini is a director
and Senior Vice  President of Calvert  Group,  Ltd., and Senior Vice President
and Chief  Investment  Officer of Calvert Asset Management  Company,  Inc. Mr.
Martini is also a director and President of  Calvert-Sloan  Advisers,  L.L.C.,
and a director and officer of Calvert New World Fund. DOB: 1/13/50.
         RONALD M.  WOLFSHEIMER,  CPA,  Treasurer.  Mr.  Wolfsheimer is Senior
Vice  President and Chief  Financial  Officer of Calvert  Group,  Ltd. and its
subsidiaries and an officer of each of the other  investment  companies in the
Calvert Group of Funds.  Mr.  Wolfsheimer  is Vice  President and Treasurer of
Calvert-Sloan Advisers,  L.L.C., and a director of Calvert Distributors,  Inc.
DOB: 07/24/47.
         WILLIAM  M.  TARTIKOFF,  Esq.,  Vice  President  and  Secretary.  Mr.
Tartikoff  is an officer of each of the  investment  companies  in the Calvert
Group of Funds, and is Senior Vice President,  Secretary,  and General Counsel
of Calvert Group,  Ltd., and each of its  subsidiaries.  Mr. Tartikoff is also
Vice President and Secretary of  Calvert-Sloan  Advisers,  L.L.C.,  a director
of Calvert  Distributors,  Inc.,  and is an officer  of Acacia  National  Life
Insurance Company. DOB: 08/12/47.
         DANIEL K. HAYES,  Vice  President.  Mr.  Hayes is Vice  President  of
Calvert  Asset  Management  Company,  Inc.,  and is an  officer of each of the
other investment  companies in the Calvert Group of Funds,  except for Calvert
New World Fund, Inc. DOB: 09/09/50.
         SUSAN  WALKER  BENDER,  Esq.,  Assistant  Secretary.  Ms.  Bender  is
Associate  General  Counsel of Calvert  Group,  Ltd. and an officer of each of
its subsidiaries  and  Calvert-Sloan  Advisers,  L.L.C. She is also an officer
of each of the  other  investment  companies  in the  Calvert  Group of Funds.
DOB: 01/29/59.
         KATHERINE STONER, Esq., Assistant Secretary. Ms. Stoner is
Associate General Counsel of Calvert Group and an officer of each of its
subsidiaries and Calvert-Sloan Advisers, L.L.C. She is also an officer of
each of the other investment companies in the Calvert Group of Funds. DOB:
10/21/56.
         IVY WAFFORD DUKE, Esq.,  Assistant  Secretary.  Ms. Duke is Associate
General  Counsel of Calvert  Group and an officer of each of its  subsidiaries
and  Calvert-Sloan  Advisers,  L.L.C.  She is also an  officer  of each of the
other  investment  companies in the Calvert  Group of Funds and  Secretary and
provides  counsel  to the  Calvert  Social  Investment  Foundation.  Prior  to
working  at  Calvert  Group,  Ms.  Duke  was an  Associate  in the  Investment
Management  Group of the Business and Finance  Department at Drinker  Biddle &
Reath. DOB: 09/07/68.
         VICTOR FRYE, Esq.,  Assistant Secretary and Compliance  Officer.  Mr.
Frye is Counsel  and  Compliance  Officer  of Calvert  Group and an officer of
each of its  subsidiaries  and  Calvert-Sloan  Advisers,  L.L.C. He is also an
officer of each of the other  investment  companies  in the  Calvert  Group of
Funds.  Prior to working at Calvert  Group,  Mr.  Frye was Counsel and Manager
of the Compliance Department at The Advisors Group. DOB: 10/15/58.

         The address of directors and officers,  unless  otherwise  noted,  is
4550 Montgomery Avenue, Suite 1000N,  Bethesda,  Maryland 20814.  Trustees and
officers  of the Fund as a group  own less than 1% of the  Fund's  outstanding
shares.  Trustees  marked with an *, above,  are  "interested  persons" of the
Fund, under the Investment Company Act of 1940.
         Each   of   the   above   directors/trustees   and   officers   is  a
director/trustee  or  officer  of  each  of the  investment  companies  in the
Calvert Group of Funds with the exception of Calvert Social  Investment  Fund,
of which only Messrs.  Baird,  Guffey and Silby and Ms. Krumsiek are among the
trustees,  Calvert Variable Series,  Inc., of which only Messrs.  Blatz, Diehl
and Pugh,  Mmes.  Krumsiek and Kruvant are among the directors,  Calvert World
Values Fund,  Inc.,  of which only Messrs.  Guffey and Silby and Ms.  Krumsiek
are among the directors,  and Calvert New World Fund,  Inc., of which only Ms.
Krumsiek and Mr. Martini are among the directors.
         The  Audit  Committee  of the Board is  composed  of  Messrs.  Baird,
Blatz,  Feldman,  Guffey  and Pugh and Ms.  Kruvant.  The  Board's  Investment
Policy  Committee  is composed of Messrs.  Borts,  Diehl,  Gavian,  Rochat and
Silby and Ms. Krumsiek.
         During  1998,  Trustees  of the Fund not  affiliated  with the Fund's
Advisor  were  paid  $43,591  by  the  Portfolio.  Trustees  of the  Fund  not
affiliated  with the  Advisor  currently  receive an annual fee of $20,500 for
service as a member of the Board of  Trustees  of the  Calvert  Group of Funds
plus a fee of $750 to $1,500 for each Board and  Committee  meeting  attended;
such fees are allocated among the Funds on the basis of their net assets.
         Trustees  of the Fund not  affiliated  with the  Fund's  Advisor  may
elect to defer  receipt of all or a  percentage  of their fees and invest them
in any fund in the  Calvert  Family of Funds  through  the  Trustees  Deferred
Compensation  Plan (shown as "Pension or Retirement  Benefits  Accrued as part
of Fund  Expenses,"  below).  Deferral of the fees is designed to maintain the
parties in the same position as if the fees were paid on a current basis.

Trustee Compensation Table

Fiscal Year 1998      Aggregate         Pension or   Total Compensation
                      Compensation      Retirement   from Benefits
(unaudited numbers)   from Registrant   Accrued as   Registrant and Fund
                      for Service       part of      Complex paid to
                      as Trustee        of Registrant     Trustee**
                                        Expenses*

Name of Trustee

Richard L. Baird, Jr. $24,732           $0                $39,550
Frank H. Blatz, Jr.   $25,797           $25,797           $42,100
Frederick T. Borts    $23,674           $0                $33,250
Charles E. Diehl      $25,803           $25,803           $41,500
Douglas E. Feldman    $25,797           $0                $36,250
Peter W. Gavian       $25,804           $12,902           $36,250
John G. Guffey, Jr.   $24,768           $0                $62,665
M. Charito Kruvant    $25,797           $15,477           $36,250
Arthur J. Pugh        $25,797           $0                $41,500
D. Wayne Silby        $24,739           $0                $67,780

*Messrs. Blatz, Diehl, Gavian and Pugh and Ms. Kruvant have chosen to defer
a portion of their compensation. As of December 31, 1998, total deferred
compensation, including dividends and capital appreciation, was $644,247.37,
$672,374.09, $172,445.85, $216,322.53, and $23,295.55, for each trustee,
respectively.
**The Fund Complex consists of nine (9) registered investment companies.

INVESTMENT ADVISOR

         The Fund's  Investment  Advisor is Calvert Asset Management  Company,
Inc.,  4550  Montgomery  Avenue,  Suite 1000N,  Bethesda,  Maryland  20814,  a
subsidiary  of  Calvert  Group,  Ltd.,  which is a  controlled  subsidiary  of
Ameritas-Acacia Mutual Holding Company.
         The  Advisory  Contract  between the  Portfolio  and the Advisor will
remain in effect  indefinitely,  provided  continuance  is  approved  at least
annually by the vote of the holders of a majority  of the  outstanding  shares
of the Portfolio,  or by the Trustees of the Portfolio;  and further  provided
that such  continuance is also approved  annually by the vote of a majority of
the  Trustees  of the  Portfolio  who  are  not  parties  to the  Contract  or
interested  persons of such  parties,  cast in person at a meeting  called for
the  purpose  of voting  on such  approval.  The  Contract  may be  terminated
without  penalty  by  either  party  on 60  days'  prior  written  notice;  it
automatically  terminates in the event of its assignment.  Under the Contract,
the  Advisor  manages  the  investment  and  reinvestment  of the  Portfolio's
assets,  subject to the  direction  and  control of the  Portfolio's  Board of
Trustees.  For its  services,  the Advisor  receives an annual fee of 0.50% of
the first $500 million of such  Portfolio's  average  daily net assets,  0.45%
of the next $500  million of such  assets,  and 0.40% of all such  assets over
$1 billion.
         The advisory fee is payable  monthly.  The Advisor reserves the right
(i)  to  waive  all or a part  of its  fee  and  (ii)  to  compensate,  at its
expense,   broker-dealers   in   consideration   of  their   promotional   and
administrative services.
         The  Advisor  provides  the  Portfolio  with  investment  advice  and
research,  pays the salaries and fees of all Trustees and  executive  officers
of  the  Portfolio  who  are  principals  of the  Advisor,  and  pays  certain
Portfolio advertising and promotional  expenses.  The Portfolio pays all other
administrative   and   operating   expenses,   including:    custodial   fees;
shareholder   servicing,   dividend   disbursing  and  transfer  agency  fees;
administrative  service fees; federal and state securities  registration fees;
insurance  premiums;   trade  association  dues;  interest,  taxes  and  other
business  fees;  legal and audit fees;  and  brokerage  commissions  and other
costs  associated  with the  purchase and sale of  portfolio  securities.  The
advisory  fees paid to the Advisor  under the advisory  contract for the 1996,
1997,  and 1998 fiscal  years were  $1,691,140,  $1,643,147,  and  $1,866,734,
respectively.
         The Advisor may  voluntarily  reimburse  the  Portfolio for expenses.
For 1996,  $117,823 in expenses was reimbursed,  for 1997,  $164,315,  and for
1998, $84,515.

ADMINISTRATIVE SERVICES

         Calvert  Administrative  Services  Company  ("CASC"),  a wholly-owned
subsidiary of Calvert  Group,  Ltd.,  has been retained by the Fund to provide
certain  administrative  services  necessary  to the  conduct  of  the  Fund's
affairs.  Prior to August 1, 1997,  CASC  received a fee of $200,000  per year
for providing  such  services,  allocated  among  Portfolios  based on assets.
Effective  August 1, 1997,  the fee structure  changed.  Exclusive of the CTFR
Money  Market  Portfolio,  the Fund pays an annual fee of  $80,000,  allocated
between the remaining  Portfolios based on assets. The administrative  service
fees paid by the  Portfolio to CASC for 1996,  1997,  and 1998,  were $24,770,
$26,655, and $30,080, respectively.

TRANSFER AND SHAREHOLDER SERVICING AGENTS

         National Financial Data Services,  Inc. ("NFDS"),  330 W. 9th Street,
Kansas City,  Missouri  64105, a subsidiary of State Street Bank & Trust,  has
been  retained by the Fund to act as transfer  agent and  dividend  disbursing
agent.  These  responsibilities  include:  responding  to certain  shareholder
inquiries and instructions,  crediting and debiting  shareholder  accounts for
purchases and  redemptions  of Fund shares and confirming  such  transactions,
and  daily  updating  of  shareholder  accounts  to  reflect  declaration  and
payment of dividends.
         Calvert  Shareholder   Services,   Inc.  ("CSSI"),   4550  Montgomery
Avenue,  Bethesda,  Maryland  20814, a subsidiary of Calvert Group,  Ltd., has
been retained by the Fund to act as shareholder  servicing agent.  Shareholder
servicing  responsibilities  include  responding to shareholder  inquiries and
instructions  concerning their accounts,  entering any telephoned purchases or
redemptions  into the NFDS system,  maintenance  of  broker-dealer  data,  and
preparing  and  distributing   statements  to  shareholders   regarding  their
accounts.  Calvert  Shareholder  Services,  Inc. was the sole  transfer  agent
prior to January 1, 1998.
         For these  services,  NFDS and  Calvert  Shareholder  Services,  Inc.
receive a fee based on the number of shareholder accounts and transactions.

INDEPENDENT ACCOUNTANTS AND CUSTODIANS

         PricewaterhouseCoopers   LLP,  250  West  Pratt  Street,   Baltimore,
Maryland  21201,  has  been  selected  by the  Board of  Trustees  to serve as
independent  auditors  for  fiscal  year  1999.  State  Street  Bank  &  Trust
Company,  N.A., 225 Franklin  Street,  Boston,  MA 02110,  currently serves as
custodian of the  Portfolio's  investments.  First  National Bank of Maryland,
25 South Charles  Street,  Baltimore,  Maryland 21203 also serves as custodian
of certain of the Portfolio's cash assets.  Neither  custodian has any part in
deciding  the  Portfolio's  investment  policies  or the choice of  securities
that are to be purchased or sold for the Portfolio.

METHOD OF DISTRIBUTION

         The  Portfolio  has entered into a principal  underwriting  agreement
with Calvert  Distributors,  Inc.  ("CDI") 4550 Montgomery  Avenue,  Bethesda,
Maryland  20814.  Pursuant to the  agreement,  CDI serves as  distributor  and
principal  underwriter  for the  Portfolio,  offering  shares on a continuous,
"best  efforts"  basis.  CDI  bears all its  expenses  of  providing  services
pursuant to the agreement,  including  payment of any  commissions and service
fees.

PORTFOLIO TRANSACTIONS

         Portfolio   transactions   are  undertaken  on  the  basis  of  their
desirability  from an  investment  standpoint.  Investment  decisions  and the
choice  of  brokers  and  dealers  are made by the  Fund's  Advisor  under the
direction and supervision of the Fund's Board of Trustees.
         Broker-dealers  who execute  portfolio  transactions on behalf of the
Fund  are  selected  on the  basis of their  professional  capability  and the
value and quality of their services.  The Advisor  reserves the right to place
orders for the purchase or sale of portfolio  securities  with  broker-dealers
who have sold  shares of the Fund or who  provide  the Fund with  statistical,
research,  or  other  information  and  services.   Although  any  statistical
research or other information and services  provided by broker-dealers  may be
useful to the Advisor,  the dollar amount of such  information and services is
generally  indeterminable,  and its  availability or receipt does not serve to
materially  reduce the Advisor's  normal research  activities or expenses.  No
brokerage  commissions  have been paid to any  officer,  trustee  or  Advisory
Council member of the Fund or any of their affiliates.
         The Advisor may also execute  portfolio  transactions with or through
broker-dealers  who have sold  shares of the Fund.  However,  such  sales will
not be a qualifying or  disqualifying  factor in a  broker-dealer's  selection
nor will the  selection  of any  broker-dealer  be based on the volume of Fund
shares sold. The Advisor may compensate,  at its expense,  such broker-dealers
in consideration of their promotional and administrative services.

GENERAL INFORMATION

         The Portfolio is a series of Calvert Tax-Free  Reserves,  an open-end
diversified   investment   management   company   which  was  organized  as  a
Massachusetts  business  trust on October 20,  1980.  The other  series of the
Fund include the Money Market  Portfolio,  Limited-Term  Portfolio,  Long-Term
Portfolio,  and the Vermont  Municipal  Portfolio.  The Fund's  Declaration of
Trust  contains an express  disclaimer  of  shareholder  liability for acts or
obligations of the Fund. The  shareholders of a  Massachusetts  business trust
might,  however,  under certain  circumstances,  be held personally  liable as
partners  for  its   obligations.   The  Declaration  of  Trust  provides  for
indemnification  and  reimbursement  of  expenses  out of Fund  assets for any
shareholder   held  personally   liable  for  obligations  of  the  Fund.  The
Declaration  of Trust provides that the Fund shall,  upon request,  assume the
defense of any claim made against any  shareholder  for any act or  obligation
of the Fund  and  satisfy  any  judgment  thereon.  The  Declaration  of Trust
further  provides  that the  Fund  may  maintain  appropriate  insurance  (for
example,  fidelity  bonding  and  errors  and  omissions  insurance)  for  the
protection of the Fund, its shareholders,  Trustees, officers,  employees, and
agents to cover  possible  tort and  other  liabilities.  Thus,  the risk of a
shareholder  incurring  financial loss on account of shareholder  liability is
limited to  circumstances  in which both inadequate  insurance  exists and the
Fund itself is unable to meet its obligations.
         Each  share  of  each  series   represents  an  equal   proportionate
interest  in that  series  with  each  other  share  and is  entitled  to such
dividends  and  distributions  out of the income  belonging  to such series as
declared by the Board.
         The Fund is not  required to hold annual  shareholder  meetings,  but
special  meetings  may  be  called  for  certain  purposes  such  as  electing
Trustees,  changing fundamental  policies, or approving a management contract.
As a shareholder, you receive one vote for each share you own.

CONTROL PERSONS AND PRINCIPAL HOLDERS
OF SECURITIES

As of April 20, 1999,  the following  shareholders  owned of record 5% or more
of the Fund:

         Name and Address                        % of Ownership

         Bruce & Betty Walkup Trust
         San Francisco, California               17.27%

                                   APPENDIX

Municipal Obligations
         Municipal   obligations  are  debt  obligations   issued  by  states,
cities,  municipalities,  and  their  agencies  to obtain  funds  for  various
public  purposes.  Such purposes  include the  construction of a wide range of
public  facilities,  the refunding of outstanding  obligations,  the obtaining
of funds for  general  operating  expenses,  and the lending of funds to other
public  institutions  and  facilities.  In addition,  certain types of private
activity  bonds are  issued by or on  behalf of public  authorities  to obtain
funds  for many  types of  local,  privately  operated  facilities.  Such debt
instruments  are  considered  municipal  obligations  if the interest  paid on
them is exempt from  federal  income tax in the opinion of bond counsel to the
issuer.  Although the  interest  paid on the  proceeds  from private  activity
bonds  used  for  the  construction,   equipment,  repair  or  improvement  of
privately  operated  industrial  or commercial  facilities  may be exempt from
federal income tax,  current  federal tax law places  substantial  limitations
on the size of such issues.
         Municipal  obligations  are generally  classified as either  "general
obligation" or "revenue"  bonds.  General  obligation bonds are secured by the
issuer's  pledge of its  faith,  credit and  taxing  power for the  payment of
principal  and interest.  Revenue bonds are payable from the revenues  derived
from a  particular  facility or class of  facilities  or, in some cases,  from
the proceeds of a special excise tax or other  specific  revenue  source,  but
not from the general taxing power.  Tax-exempt  private  activity bonds are in
most cases revenue  bonds and do not generally  carry the pledge of the credit
of  the  issuing  municipality.  There  are,  of  course,  variations  in  the
security of municipal  obligations,  both within a  particular  classification
and among classifications.
         Municipal  obligations are generally  traded on the basis of a quoted
yield  to  maturity,  and  the  price  of the  security  is  adjusted  so that
relative  to the stated  rate of  interest  it will  return the quoted rate to
the purchaser.
         Short-term  and  limited-term   municipal   obligations  include  Tax
Anticipation  Notes,  Revenue  Anticipation  Notes, Bond  Anticipation  Notes,
Construction   Loan  Notes,  and  Discount  Notes.  The  maturities  of  these
instruments  at the time of issue  generally  will range  between three months
and one year.  Pre-Refunded  Bonds with longer nominal maturities that are due
to be retired  with the  proceeds  of an escrowed  subsequent  issue at a date
within  one  year  and  three  years  of the  time  of  acquisition  are  also
considered short-term and limited-term municipal obligations.

Municipal Bond and Note Ratings
Description  of  Moody's  Investors  Service,  Inc.'s  ratings  of  state  and
municipal notes:
         Moody's  ratings for state and municipal  notes and other  short-term
obligations   are  designated   Moody's   Investment   Grade   ("MIG").   This
distinction is in recognition of the  differences  between  short-term  credit
risk and long-term risk.
         MIG 1:  Notes  bearing  this  designation  are of the  best  quality,
enjoying  strong  protection  from  established  cash flows of funds for their
servicing  or from  established  and  broad-based  access  to the  market  for
refinancing, or both.
         MIG2:  Notes  bearing  this  designation  are of high  quality,  with
margins of protection ample although not so large as in the preceding group.
         MIG3: Notes bearing this designation are of favorable  quality,  with
all security  elements  accounted for but lacking the  undeniable  strength of
the  preceding  grades.  Market  access for  refinancing,  in  particular,  is
likely to be less well established.
         MIG4:  Notes  bearing  this  designation  are  of  adequate  quality,
carrying  specific risk but having  protection  commonly  regarded as required
of an investment security and not distinctly or predominantly speculative.

Description of Moody's  Investors  Service  Inc.'s/Standard & Poor's municipal
bond ratings:
         Aaa/AAA:  Best  quality.  These  bonds carry the  smallest  degree of
investment  risk  and are  generally  referred  to as  "gilt  edge."  Interest
payments are  protected by a large or by an  exceptionally  stable  margin and
principal is secure.  This rating  indicates an extremely  strong  capacity to
pay principal and interest.
         Aa/AA:   Bonds   rated  AA  also   qualify   as   high-quality   debt
obligations.  Capacity to pay  principal  and interest is very strong,  and in
the  majority of instances  they differ from AAA issues only in small  degree.
They are rated lower than the best bonds  because  margins of  protection  may
not be as large as in Aaa securities,  fluctuation of protective  elements may
be of greater  amplitude,  or there may be other  elements  present which make
long-term risks appear somewhat larger than in Aaa securities.
         A/A:  Upper-medium  grade  obligations.  Factors  giving  security to
principal and interest are  considered  adequate,  but elements may be present
which  make the bond  somewhat  more  susceptible  to the  adverse  effects of
circumstances and economic conditions.
         Baa/BBB:   Medium  grade   obligations;   adequate  capacity  to  pay
principal and  interest.  Whereas they normally  exhibit  adequate  protection
parameters,  adverse economic  conditions or changing  circumstances  are more
likely to lead to a  weakened  capacity  to pay  principal  and  interest  for
bonds in this category than for bonds in the A category.
         Ba/BB,  B/B,  Caa/CCC,  Ca/CC:  Debt  rated  in these  categories  is
regarded  as  predominantly  speculative  with  respect  to  capacity  to  pay
interest  and repay  principal.  There  may be some  large  uncertainties  and
major  risk  exposure  to  adverse  conditions.   The  higher  the  degree  of
speculation, the lower the rating.
         C/C: This rating is only for no-interest income bonds.
         D: Debt in  default;  payment  of  interest  and/or  principal  is in
arrears.
<PAGE>


                          Calvert Tax-Free Reserves
                         Vermont Municipal Portfolio
4550 Montgomery Avenue, Bethesda, Maryland 20814

Statement of Additional Information
                                April 30, 1999

TABLE OF CONTENTS

Investment Policies                                            1
Investment Restrictions                                        8
Purchases and Redemptions of Shares                            9
Dividends, Distributions and Tax Matters                       9
Valuation of Shares                                           10
Calculation of Yield and Total Return                         10
Advertising                                                   11
Trustees and Officers                                         12
Investment Advisor                                            14
Administrative Services                                       15
Transfer and Shareholder Servicing Agents                     15
Independent Accountants and Custodians                        15
Method of Distribution                                        15
Portfolio Transactions                                        16
General Information                                           16
Control Persons and Principal Holders of Securities           17
Appendix                                                      17


New Account Information
         (800) 368-2748
         (301) 951-4820

Shareholder Services
         (800) 368-2745

Broker Services
         (800) 368-2746
         (301) 951-4850

TDD for the Hearing- Impaired
         (800) 541-1524

         This  Statement  of  Additional  Information  is  not  a  prospectus.
Investors  should read the Statement of Additional  Information in conjunction
with the Portfolio's  Prospectus,  dated April 30, 1999, which may be obtained
free of charge  by  writing  the Fund at the  above  address  or  calling  the
telephone numbers listed above.

         The audited  financial  statements in the  Portfolio's  Annual Report
to  Shareholders  dated  December  31, 1998,  are  expressly  incorporated  by
reference  and made a part of this  Statement  of  Additional  Information.  A
copy of the  Annual  Report  may be  obtained  free of  charge by  writing  or
calling the Portfolio.

                             INVESTMENT POLICIES

         The  Portfolio  invests  primarily in a  nondiversified  portfolio of
municipal  obligations of the state of Vermont and its political  subdivisions
("Vermont  Municipal  Obligations").   Under  normal  market  conditions,  the
Portfolio  attempts  to  invest  at least  65% of the  value of its  assets in
Vermont Municipal  Obligations.  The Portfolio will also attempt to invest the
remaining 35% of its total assets in these  obligations,  but may invest it in
municipal  obligations of other states,  territories,  and  possessions of the
United States,  the District of Columbia,  and their  respective  authorities,
agencies,   instrumentalities,   and  political  subdivisions.  Dividends  you
receive  from the  Portfolio  that are derived  from  interest  on  tax-exempt
obligations  of other  governmental  issuers  will be exempt from federal tax,
but may be subject to Vermont state income  taxes.  The  investment  objective
may only be changed with shareholder approval.
         Since the  Portfolio is  nondiversified,  it may invest its assets in
fewer  issuers  than if it were  diversified.  As a  result,  the  Portfolio's
performance may be more directly  impacted by changes in conditions  affecting
those  issuers than it would be if the Portfolio  were  investing in a greater
number  of  issuers  A  complete  explanation  of  municipal  obligations  and
municipal bond and note ratings is set forth in the Appendix.
         The credit  rating of the  Portfolio's  assets as of its most  recent
fiscal  year-end  appears in the Annual Report to  Shareholders,  incorporated
by reference herein.

Variable Rate Obligations and Demand Notes
         The Portfolio may invest in variable rate obligations. Variable
rate obligations have a yield that is adjusted periodically based on changes
in the level of prevailing interest rates. Floating rate obligations have an
interest rate fixed to a known lending rate, such as the prime rate, and are
automatically adjusted when the known rate changes. Variable rate
obligations lessen the capital fluctuations usually inherent in fixed income
investments. This diminishes the risk of capital depreciation of investment
securities in a Portfolio and, consequently, of Portfolio shares. However,
if interest rates decline, the yield of the invested Portfolio will decline,
causing the Portfolio and its shareholders to forego the opportunity for
capital appreciation of the Portfolio's investments and of their shares.
         The Portfolio may invest in floating rate and variable rate demand
notes. Demand notes provide that the holder may demand payment of the note
at its par value plus accrued interest by giving notice to the issuer. To
ensure the ability of the issuer to make payment on demand, a bank letter of
credit or other liquidity facility may support the note.
         The Board of  Trustees  has  approved  investments  in  floating  and
variable  rate demand notes upon the following  conditions:  the Portfolio has
right of demand,  upon notice not to exceed  thirty  days,  against the issuer
to  receive  payment;  the  issuer  will be able to  make  payment  upon  such
demand,  either from its own  resources or through an  unqualified  commitment
from a third party;  and the rate of interest  payable is calculated to ensure
that  the  market  value  of such  notes  will  approximate  par  value on the
adjustment  dates.  The remaining  maturity of such demand notes is deemed the
period  remaining  until such time as the  Portfolio can recover the principal
through demand.

Municipal Leases
         The  Portfolio  may  invest  in  municipal   leases,   or  structured
instruments  where the underlying  security is a municipal  lease. A municipal
lease  is  an  obligation  of a  government  or  governmental  authority,  not
subject to voter  approval,  used to finance  capital  projects  or  equipment
acquisitions and payable through  periodic rental payments.  The Portfolio may
purchase  unrated leases.  There are additional risks inherent in investing in
this type of municipal  security.  Unlike  municipal notes and bonds,  where a
municipality  is obligated  by law to make  interest  and  principal  payments
when due,  funding for lease  payments  needs to be  appropriated  each fiscal
year in the budget.  It is possible that a municipality  will not  appropriate
funds for lease  payments.  The Advisor  considers risk of cancellation in its
investment  analysis.  The Fund's Advisor,  under the supervision of the Board
of  Trustees/Directors,  is responsible  for determining the credit quality of
such leases on an ongoing  basis,  including an assessment  of the  likelihood
that  the  lease  will  not  be  canceled.  Certain  municipal  leases  may be
considered   illiquid  and  subject  to  the  Portfolio's  limit  on  illiquid
securities.  The Board of  Trustees/Directors  has  directed  the  Advisor  to
treat a municipal  lease as a liquid  security if it satisfies  the  following
conditions:  (A)  such  treatment  must be  consistent  with  the  Portfolio's
investment  restrictions;  (B) the Advisor should be able to conclude that the
obligation  will maintain its liquidity  throughout the time it is held by the
Portfolio,  based on the  following  factors:  (1)  whether  the  lease may be
terminated by the lessee; (2) the potential  recovery,  if any, from a sale of
the leased property upon  termination of the lease;  (3) the lessee's  general
credit  strength  (e.g.,  its debt,  administrative,  economic  and  financial
characteristics  and  prospects);  (4) the  likelihood  that the  lessee  will
discontinue   appropriating  funding  for  the  leased  property  because  the
property  is  no  longer  deemed  essential  to  its  operations   (e.g.,  the
potential   for  an  "event  of   nonappropriation"),   and  (5)  any   credit
enhancement or legal recourse  provided upon an event of  nonappropriation  or
other  termination of the lease; and (C) the Advisor should determine  whether
the  obligation  can be disposed of within seven days in the  ordinary  course
of business at  approximately  the amount at which the Portfolio has valued it
for purposes of  calculating  the  Portfolio's  net asset  value,  taking into
account the following  factors:  (1) the  frequency of trades and quotes;  (2)
the  volatility  of  quotations  and trade  prices;  (3) the number of dealers
willing  to  purchase  or sell  the  security  and  the  number  of  potential
purchasers;  (4) dealer  undertakings  to make a market in the  security;  (5)
the nature of the security  and the nature of the  marketplace  trades  (e.g.,
the time needed to dispose of the security,  the method of soliciting  offers,
and the  mechanics  of the  transfer);  (6) the rating of the security and the
financial  condition  and  prospects  of the  issuer;  and (7)  other  factors
relevant to the Portfolio's ability to dispose of the security.

Obligations with Puts Attached
         The Portfolio  has authority to purchase  securities at a price which
would result in a yield to maturity lower than that  generally  offered by the
seller  at the time of  purchase  when it can  acquire  at the  same  time the
right to sell the  securities  back to the  seller at an agreed  upon price at
any  time  during  a  stated  period  or on a  certain  date.  Such a right is
generally denoted as a "put."  Unconditional  puts are readily  exercisable in
the event of a default in payment of principal  or interest on the  underlying
securities.

Temporary Investments
         From time to time for  liquidity  purposes or pending the  investment
of the proceeds of the sale of Portfolio  shares,  the Portfolio may invest in
and  derive  up to 20% of its  income  from  taxable  obligations  of the U.S.
Government,  its agencies  and  instrumentalities.  Interest  earned from such
taxable  investments  will be taxable to investors as ordinary  income  unless
the investors are otherwise exempt from taxation.
         The   Portfolio   intends  to   minimize   taxable   income   through
investment,  when possible, in short-term tax-exempt  securities.  To minimize
taxable income, the Portfolio may also hold cash which is not earning income.

Repurchase Agreements
         The  Portfolio  may purchase  debt  securities  subject to repurchase
agreements,   which  are  arrangements   under  which  the  Portfolio  buys  a
security,  and the seller  simultaneously agrees to repurchase the security at
a  specified  time  and  price  reflecting  a  market  rate of  interest.  The
Portfolio  engages in repurchase  agreements in order to earn a higher rate of
return than it could earn simply by investing in the  obligation  which is the
subject of the repurchase  agreement.  Repurchase agreements are not, however,
without  risk.  In the event of the  bankruptcy of a seller during the term of
a repurchase  agreement,  a legal question  exists as to whether the Portfolio
would be deemed the owner of the  underlying  security or would be deemed only
to have a security  interest  in and lien upon such  security.  The  Portfolio
will only engage in repurchase  agreements with recognized  securities dealers
and banks  determined to present  minimal credit risk by the Advisor under the
direction and supervision of the Portfolio's  Board of Trustees.  In addition,
the Portfolio will only engage in repurchase  agreements  reasonably  designed
to secure fully during the term of the  agreement  the seller's  obligation to
repurchase  the  underlying  security and will monitor the market value of the
underlying  security  during  the term of the  agreement.  If the value of the
underlying  security  declines  and is not at least  equal  to the  repurchase
price  due  the  Portfolio  pursuant  to the  agreement,  the  Portfolio  will
require  the  seller to pledge  additional  securities  or cash to secure  the
seller's  obligations  pursuant to the  agreement.  If the seller  defaults on
its  obligation  to  repurchase  and  the  value  of the  underlying  security
declines,  the  Portfolio  may incur a loss and may incur  expenses in selling
the  underlying  security.  Repurchase  agreements  are always for  periods of
less than one year.  Repurchase  agreements not  terminable  within seven days
are considered illiquid.

Reverse Repurchase Agreements
         The  Portfolio  may also  engage in  reverse  repurchase  agreements.
Under a reverse  repurchase  agreement,  the Portfolio  sells  securities to a
bank or  securities  dealer and agrees to  repurchase  those  securities  from
such  party at an  agreed  upon  date and price  reflecting  a market  rate of
interest.  The  Portfolio  invests the proceeds  from each reverse  repurchase
agreement in  obligations  in which it is authorized to invest.  The Portfolio
intends to enter into a reverse  repurchase  agreement  only when the interest
income  provided  for in the  obligation  in which the  Portfolio  invests the
proceeds is expected to exceed the amount the  Portfolio  will pay in interest
to the  other  party to the  agreement  plus  all  costs  associated  with the
transactions.  The Portfolio does not intend to borrow for leverage  purposes.
The  Portfolio  will  only  be  permitted  to  pledge  assets  to  the  extent
necessary to secure borrowings and reverse repurchase agreements.
         During the time a reverse  repurchase  agreement is outstanding,  the
Portfolio  will  maintain  in a  segregated  account  an  amount  of cash,  US
Government  securities or other liquid,  high-quality debt securities equal in
value to the  repurchase  price.  The Portfolio  will mark to market the value
of assets held in the segregated  account,  and will place  additional  assets
in the  account  whenever  the  total  value of the  account  falls  below the
amount required under applicable regulations.
         The Portfolio's  use of reverse  repurchase  agreements  involves the
risk  that  the  other  party  to  the  agreements  could  become  subject  to
bankruptcy or  liquidation  proceedings  during the period the  agreements are
outstanding.  In such event,  the Portfolio may not be able to repurchase  the
securities it has sold to that other party. Under those  circumstances,  if at
the  expiration of the  agreement  such  securities  are of greater value than
the proceeds  obtained by the Portfolio  under the  agreements,  the Portfolio
may have been better off had it not entered into the agreement.  However,  the
Portfolio will enter into reverse  repurchase  agreements  only with banks and
dealers  which  the  Advisor  believes  present  minimal  credit  risks  under
guidelines  adopted by the  Portfolio's  Board of Trustees.  In addition,  the
Portfolio  bears the risk that the market value of the  securities it sold may
decline below the agreed-upon  repurchase  price, in which case the dealer may
request the Portfolio to post additional collateral.

When-Issued Purchases
         New issues of  municipal  obligations  are  offered on a  when-issued
basis;  that is,  delivery and payment for the securities  normally take place
15 to 45 days after the date of the  transaction.  The payment  obligation and
the yield that will be received on the  securities  are each fixed at the time
the  buyer  enters  into  the   commitment.   The  Portfolio  will  only  make
commitments  to  purchase  these  securities  with the  intention  of actually
acquiring  them, but may sell these  securities  before the settlement date if
it is deemed advisable as a matter of investment strategy.
         Securities  purchased on a when-issued  basis and the securities held
in the  Portfolio  are  subject  to  changes  in market  value  based upon the
public's  perception of the  creditworthiness of the issuer and changes in the
level of interest  rates  (which  will  generally  result in both  changing in
value in the same way,  i.e.,  both  experiencing  appreciation  when interest
rates decline and  depreciation  when interest rates rise).  Therefore,  if in
order to achieve higher interest income,  the Portfolio remains  substantially
fully  invested  at the  same  time  that  it has  purchased  securities  on a
when-issued basis,  there will be a greater  possibility that the market value
of the Portfolio's assets may vary.
         When  the  time  comes  to  pay  for  when-issued   securities,   the
Portfolio will meet its  obligations  from then  available cash flow,  sale of
securities  or,  although it would not normally  expect to do so, from sale of
the when-issued  securities  themselves (which may have a market value greater
or less than the Portfolio's payment  obligation).  Sale of securities to meet
such  obligations  carries with it a greater  potential for the realization of
capital  losses and capital  gains which are not exempt  from  federal  income
tax.  When issued  securities  do not earn income until they have in fact been
issued.
         When  the  Portfolio  purchases  a  when-issued   security,  it  will
maintain an amount of cash, cash  equivalents  (for example,  commercial paper
and daily  tender  adjustable  notes) or  short-term  high-grade  fixed income
securities  in a segregated  account so that the amount so  segregated  equals
the  market  value  of  the  when-issued   purchase,   thereby   ensuring  the
transaction is unleveraged.

Non-Investment Grade Debt Securities
         Non-investment   grade  debt   securities   are  lower  quality  debt
securities  (generally  those  rated  BB or  lower  by S&P or Ba or  lower  by
Moody's,  known  as "junk  bonds."  These  securities  have  moderate  to poor
protection   of  principal   and  interest   payments  and  have   speculative
characteristics.  (See  Appendix  for a  description  of the  ratings.)  These
securities  involve  greater risk of default or price  declines due to changes
in  the  issuer's  creditworthiness  than  investment-grade  debt  securities.
Because the market for  lower-rated  securities may be thinner and less active
than for  higher-rated  securities,  there may be market price  volatility for
these  securities and limited  liquidity in the resale  market.  Market prices
for  these  securities  may  decline   significantly  in  periods  of  general
economic difficulty or rising interest rates.
         The quality  limitation set forth in the Fund's  investment policy is
determined  immediately  after the  Fund's  acquisition  of a given  security.
Accordingly,  any  later  change  in  ratings  will  not  be  considered  when
determining whether an investment complies with the Fund's investment policy.
         When  purchasing  non-investment  grade  debt  securities,  rated  or
unrated,  the Advisor  prepares its own careful credit  analysis to attempt to
identify  those issuers whose  financial  condition is adequate to meet future
obligations  or is expected to be  adequate in the future.  Through  portfolio
diversification   and  credit  analysis,   investment  risk  can  be  reduced,
although there can be no assurance that losses will not occur.

Derivatives
         The Portfolio can use various techniques to increase or decrease
its exposure to changing security prices, interest rates, or other factors
that affect security values. These techniques may involve derivative
transactions such as buying and selling options and futures contracts and
leveraged notes, entering into swap agreements, and purchasing indexed
securities. The Portfolio can use these practices either as substitution or
as protection against an adverse move in the Portfolio to adjust the risk
and return characteristics of the Portfolio. If the Advisor judges market
conditions incorrectly or employs a strategy that does not correlate well
with a Portfolio's investments, or if the counterparty to the transaction
does not perform as promised, these techniques could result in a loss. These
techniques may increase the volatility of a Portfolio and may involve a
small investment of cash relative to the magnitude of the risk assumed.
Derivatives are often illiquid.

Options and Futures Contracts
         The  Portfolio   may,  in  pursuit  of  its   respective   investment
objectives,  purchase  put and call  options  and  engage  in the  writing  of
covered  call  options  and secured  put  options on  securities  and employ a
variety  of  other  investment   techniques  such  as  interest  rate  futures
contracts, and options on such futures, as described more fully below.
         The  Portfolio  may  engage  in such  transactions  only to hedge the
existing   positions  in  the   Portfolio.   They  will  not  engage  in  such
transactions  for the purposes of  speculation  or leverage.  Such  investment
policies  and  techniques  may  involve  a greater  degree of risk than  those
inherent in more conservative investment approaches.
         The Portfolio may write  "covered  options" on securities in standard
contracts  traded on national  securities  exchanges.  The Portfolio may write
such  options in order to receive the  premiums  from  options that expire and
to seek net gains from  closing  purchase  transactions  with  respect to such
options.

Put and Call Options.  The  Portfolio  may purchase put and call  options,  in
standard  contracts  traded on national  securities  exchanges.  The Portfolio
will  purchase  such  options  only to hedge  against  changes in the value of
securities  the  Portfolio  hold and not for the  purposes of  speculation  or
leverage.  By buying a put, a Portfolio  has the right to sell the security at
the exercise  price,  thus  limiting its risk of loss through a decline in the
market  value  of the  security  until  the put  expires.  The  amount  of any
appreciation  in the  value  of the  underlying  security  will  be  partially
offset by the amount of the  premium  paid for the put option and any  related
transaction  costs.  Prior to its  expiration,  a put  option may be sold in a
closing sale  transaction  and any profit or loss from the sale will depend on
whether  the amount  received  is more or less than the  premium  paid for the
put option plus the related transaction costs.
         The Portfolio  may purchase  call options on securities  which it may
intend to purchase or as an interest  rate  hedge.  Such  transactions  may be
entered  into in order to limit  the  risk of a  substantial  increase  in the
market price of the  security  which the  Portfolio  intends to purchase or in
the level of market  interest rates.  Prior to its  expiration,  a call option
may be sold in a  closing  sale  transaction.  Any  profit or loss from such a
sale will  depend on  whether  the  amount  received  is more or less than the
premium paid for the call option plus the related transaction costs.

Covered  Options.  The Portfolio may write only covered  options on securities
in standard  contracts  traded on national  securities  exchanges.  This means
that,  in the case of call  options,  so long as a Portfolio  is  obligated as
the writer of a call option,  that Portfolio will own the underlying  security
subject to the option and, in the case of put options,  that  Portfolio  will,
through its custodian,  deposit and maintain  either cash or securities with a
market value equal to or greater than the exercise price of the option.
         When a Portfolio  writes a covered call option,  the Portfolio  gives
the  purchaser  the right to purchase the security at the call option price at
any time  during  the life of the  option.  As the writer of the  option,  the
Portfolio  receives a premium,  less a  commission,  and in exchange  foregoes
the  opportunity  to  profit  from any  increase  in the  market  value of the
security  exceeding the call option price.  The premium serves to mitigate the
effect  of any  depreciation  in the  market  value of the  security.  Writing
covered  call  options  can  increase  the  income of the  Portfolio  and thus
reduce  declines  in the  net  asset  value  per  share  of the  Portfolio  if
securities  covered  by such  options  decline  in value.  Exercise  of a call
option by the  purchaser  however will cause the  Portfolio  to forego  future
appreciation of the securities covered by the option.
         When a Portfolio  writes a covered put option,  it will gain a profit
in the amount of the premium,  less a commission,  so long as the price of the
underlying security remains above the exercise price.  However,  the Portfolio
remains  obligated to purchase the  underlying  security from the buyer of the
put option  (usually  in the event the price of the  security  falls below the
exercise  price) at any time  during  the option  period.  If the price of the
underlying  security  falls  below  the  exercise  price,  the  Portfolio  may
realize a loss in the amount of the  difference  between  the  exercise  price
and the sale price of the security, less the premium received.
         The  Portfolio  may  purchase  securities  which may be covered  with
call  options  solely  on the  basis  of  considerations  consistent  with the
investment   objectives  and  policies  of  the  Portfolio.   The  Portfolio's
turnover  may  increase  through  the  exercise  of a call  option;  this will
generally  occur if the market  value of a "covered"  security  increases  and
the portfolio has not entered into a closing purchase transaction.
      Risks Related to Options  Transactions.  The Portfolio can close out its
respective  positions in  exchange-traded  options  only on an exchange  which
provides a secondary  market in such options.  Although the Portfolio  intends
to acquire  and write only such  exchange-traded  options  for which an active
secondary  market  appears  to exist,  there can be no  assurance  that such a
market will exist for any particular  option contract at any particular  time.
This might  prevent the  Portfolio  from  closing an options  position,  which
could impair the Portfolio's  ability to hedge  effectively.  The inability to
close out a call  position  may have an adverse  effect on  liquidity  because
the Portfolio  may be required to hold the  securities  underlying  the option
until the option expires or is exercised.

Transactions in Futures Contracts
         The  Portfolio  may  engage  in the  purchase  and  sale  of  futures
contracts on an index of municipal bonds or on U.S.  Treasury  securities,  or
options on such futures  contracts,  for hedging  purposes only. The Portfolio
may sell such futures  contracts in  anticipation  of a decline in the cost of
municipal   bonds  it  holds  or  may  purchase  such  futures   contracts  in
anticipation  of an increase  in the value of  municipal  bonds the  Portfolio
intends to acquire.  The  Portfolio  also is  authorized  to purchase and sell
other  financial  futures  contracts  which in the  opinion of the  Investment
Advisor  provide  an  appropriate  hedge  for  some or all of the  Portfolio's
securities.
         Because of low  initial  margin  deposits  made upon the opening of a
futures position,  futures  transactions  involve substantial  leverage.  As a
result,  relatively  small movements in the price of the futures  contract can
result in substantial  unrealized gains or losses.  Because the Portfolio will
engage in the  purchase  and sale of financial  futures  contracts  solely for
hedging  purposes,  however,  any  losses  incurred  in  connection  therewith
should,  if the hedging strategy is successful,  be offset in whole or in part
by increases  in the value of  securities  held by the  Portfolio or decreases
in the price of securities the Portfolio intends to acquire.
         Municipal  bond index  futures  contracts  commenced  trading in June
1985,  and it is possible that trading in such futures  contracts will be less
liquid  than  that  in  other  futures  contracts.   The  trading  of  futures
contracts  and options  thereon is subject to certain  market  risks,  such as
trading halts,  suspensions,  exchange or clearing house  equipment  failures,
government  intervention  or other  disruptions  of normal  trading  activity,
which could at times make it difficult  or  impossible  to liquidate  existing
positions.
         The  liquidity  of a  secondary  market in futures  contracts  may be
further  adversely  affected by "daily price fluctuation  limits"  established
by contract  markets,  which limit the amount of fluctuation in the price of a
futures  contract or option  thereon  during a single  trading  day.  Once the
daily limit has been  reached in the  contract,  no trades may be entered into
at a  price  beyond  the  limit,  thus  preventing  the  liquidation  of  open
positions.  Prices  of  existing  contracts  have in the past  moved the daily
limit on a number of  consecutive  trading days. The Portfolio will enter into
a futures position only if, in the judgment of the Investment  Advisor,  there
appears to be an actively traded secondary market for such futures contracts.
         The successful use of transactions  in futures  contracts and options
thereon  depends  on  the  ability  of the  Investment  Advisor  to  correctly
forecast the  direction  and extent of price  movements of these  instruments,
as well as price  movements of the securities  held by the Portfolio  within a
given time frame.  To the extent these prices  remain stable during the period
in which a futures or option  contract is held by the Portfolio,  or move in a
direction  opposite to that  anticipated,  the Portfolio may realize a loss on
the  hedging  transaction  which  is  not  fully  or  partially  offset  by an
increase  in the  value  of  the  Portfolio's  securities.  As a  result,  the
Portfolio's  total  return  for  such  period  may be less  than if it had not
engaged in the hedging transaction.


Description of Financial Futures Contracts
         Futures  Contracts.  A futures  contract  obligates  the  seller of a
contract to deliver and the  purchaser  of a contract to take  delivery of the
type  of  financial  instrument  called  for  in  the  contract  or,  in  some
instances,  to  make a cash  settlement,  at a  specified  future  time  for a
specified  price.  Although the terms of a contract  call for actual  delivery
or  acceptance  of  securities,  or for a cash  settlement,  in most cases the
contracts  are closed out before the  delivery  date  without the  delivery or
acceptance  taking  place.  The  Portfolio  intends  to close out its  futures
contracts prior to the delivery date of such contracts.
         The  Portfolio  may  sell  futures  contracts  in  anticipation  of a
decline  in  the  value  of its  investments  in  municipal  bonds.  The  loss
associated  with any such decline could be reduced without  employing  futures
as a  hedge  by  selling  long-term  securities  and  either  reinvesting  the
proceeds in securities  with shorter  maturities or by holding assets in cash.
This strategy,  however,  entails  increased  transaction costs in the form of
brokerage  commissions  and  dealer  spreads  and will  typically  reduce  the
Portfolio's average yields as a result of the shortening of maturities.
         The  purchase  or  sale  of  a  futures  contract  differs  from  the
purchase  or  sale of a  security,  in that no  price  or  premium  is paid or
received.  Instead,  an  amount  of  cash  or  securities  acceptable  to  the
Portfolio's  futures  commission  merchant and the relevant  contract  market,
which varies but is generally  about 5% or less of the contract  amount,  must
be deposited  with the broker.  This amount is known as "initial  margin," and
represents  a "good  faith"  deposit  assuring  the  performance  of both  the
purchaser and the seller under the futures  contract.  Subsequent  payments to
and from the broker,  known as "variation  margin," are required to be made on
a daily  basis as the price of the  futures  contract  fluctuates,  making the
long or short  positions  in the futures  contract  more or less  valuable,  a
process  known as "marking to the  market."  Prior to the  settlement  date of
the futures  contract,  the  position  may be closed out by taking an opposite
position  which  will  operate  to  terminate  the  position  in  the  futures
contract.  A final determination of variation margin is then made,  additional
cash is required to be paid to or  released by the broker,  and the  purchaser
realizes a loss or gain. In addition,  a commission is paid on each  completed
purchase and sale transaction.
         The sale of  financial  futures  contracts  provides  an  alternative
means  of  hedging  the  Portfolio  against  declines  in  the  value  of  its
investments  in  municipal  bonds.  As such values  decline,  the value of the
Portfolio's  position in the futures  contracts  will tend to  increase,  thus
offsetting  all or a portion of the  depreciation  in the market  value of the
Portfolio's  fixed  income  investments  which  are  being  hedged.  While the
Portfolio  will incur  commission  expenses  in  establishing  and closing out
futures  positions,  commissions on futures  transactions may be significantly
lower  than  transaction  costs  incurred  in the  purchase  and sale of fixed
income securities.  In addition,  the ability of the Portfolio to trade in the
standardized  contracts  available  in the  futures  market  may  offer a more
effective  hedging  strategy than a program to reduce the average  maturing of
portfolio  securities,  due to the  unique and  varied  credit  and  technical
characteristics   of  the  municipal   debt   instruments   available  to  the
Portfolio.  Employing  futures  as a hedge may also  permit the  Portfolio  to
assume a  hedging  posture  without  reducing  the  yield on its  investments,
beyond any amounts required to engage in futures trading.
         The  Portfolio  may  engage  in the  purchase  and  sale  of  futures
contracts on an index of municipal  securities.  These instruments provide for
the  purchase or sale of a  hypothetical  portfolio  of  municipal  bonds at a
fixed price in a stated delivery month.  Unlike most other futures  contracts,
however,  a municipal  bond index  futures  contract  does not require  actual
delivery  of  securities  but  results  in a cash  settlement  based  upon the
difference  in value of the index  between the time the  contract  was entered
into and the time it is liquidated.
         The municipal bond index  underlying the futures  contracts traded by
the Portfolio is The Bond Buyer  Municipal  Bond Index,  developed by The Bond
Buyer and the Chicago  Board of Trade  ("CBT"),  the contract  market on which
the  futures  contracts  are traded.  As  currently  structured,  the index is
comprised  of 40  tax-exempt  term  municipal  revenue and general  obligation
bonds.  Each bond  included in the index must be rated  either A- or higher by
Standard & Poor's or A or higher by Moody's  Investors  Service  and must have
a  remaining  maturity  of  19  years  or  more.  Twice  a  month  new  issues
satisfying the eligibility  requirements  are added to, and an equal number of
old  issues  will be  deleted  from,  the  index.  The  value of the  index is
computed  daily  according  to a formula  based upon the price of each bond in
the index, as evaluated by four dealer-to-dealers brokers.
         The Portfolio  may also  purchase and sell futures  contracts on U.S.
Treasury bills,  notes and bonds for the same types of hedging purposes.  Such
futures  contracts  provide  for  delivery  of the  underlying  security  at a
specified  future  time  for a fixed  price,  and  the  value  of the  futures
contract therefore generally fluctuates with movements in interest rates.
         The  municipal  bond index  futures  contract,  futures  contracts on
U.S.  Treasury  securities and options on such futures contracts are traded on
the CBT, which,  like other contract  markets,  assures the performance of the
parties to each futures contract through a clearing  corporation,  a nonprofit
organization  managed by the exchange  membership,  which is also  responsible
for handling daily accounting of deposits or withdrawals of margin.
         The Portfolio may also purchase  financial  futures contracts when it
is not fully  invested in municipal  bonds in  anticipation  of an increase in
the cost of securities the Portfolio  intends to purchase.  As such securities
are purchased,  an equivalent  amount of futures contracts will be closed out.
In a substantial  majority of these transactions,  the Portfolio will purchase
municipal  bonds upon  termination of the futures  contracts.  Due to changing
market  conditions and interest rate forecasts,  however,  a futures  position
may  be   terminated   without  a   corresponding   purchase  of   securities.
Nevertheless,  all  purchases of futures  contracts by the  Portfolio  will be
subject to certain restrictions, described below.
         Options  on  Futures  Contracts.  An  option  on a  futures  contract
provides the purchaser with the right,  but not the obligation,  to enter into
a long position in the  underlying  futures  contract  (that is,  purchase the
futures  contract),  in the case of a "call" option, or a short position (sell
the futures  contract),  in the case of a "put"  option,  for a fixed price up
to a stated  expiration  date.  The option is purchased  for a  non-refundable
fee,  known as the  "premium."  Upon  exercise  of the  option,  the  contract
market  clearing  house assigns each party to the option an opposite  position
in the underlying futures contract. In the event of exercise,  therefore,  the
parties  are subject to all of the risks of futures  trading,  such as payment
of initial and  variation  margin.  In addition,  the seller,  or "writer," of
the option is subject to margin  requirements on the option position.  Options
on  futures  contracts  are  traded  on  the  same  contract  markets  as  the
underlying futures contracts.
         The  Portfolio  may  purchase  options on futures  contracts  for the
same types of hedging  purposes  described  above in  connection  with futures
contracts.  For example,  in order to protect  against an anticipated  decline
in the  value of  securities  it  holds,  the  Portfolio  could  purchase  put
options  on futures  contracts,  instead of  selling  the  underlying  futures
contracts.  Conversely,  in order to protect  against the  adverse  effects of
anticipated  increases  in  the  costs  of  securities  to  be  acquired,  the
Portfolio  could  purchase  call  options  on  futures  contracts,  instead of
purchasing  the underlying  futures  contracts.  The Portfolio  generally will
sell options on futures contracts only to close out an existing position.
         The Portfolio  will not engage in  transactions  in such  instruments
unless and until the  Investment  Advisor  determines  that market  conditions
and the  circumstances  of the Portfolio  warrant such trading.  To the extent
the  Portfolio  engages  in the  purchase  and sale of  futures  contracts  or
options  thereon,  it will do so only at a level  which is  reflective  of the
Investment  Advisor's  view  of  the  hedging  needs  of  the  Portfolio,  the
liquidity   of  the  market  for  futures   contracts   and  the   anticipated
correlation  between  movements in the value of the futures or option contract
and the value of securities held by the Portfolio.
         Restrictions  on the Use of Futures  Contracts and Options on Futures
Contracts.  Under  regulations  of the Commodity  Futures  Trading  Commission
("CFTC"),  the futures trading activities  described herein will not result in
the  Portfolio  being deemed to be a "commodity  pool," as defined  under such
regulations,  provided that certain  trading  restrictions  are adhered to. In
particular,  CFTC  regulations  require that all futures and option  positions
entered  into by the  Portfolio  qualify as bona fide hedge  transactions,  as
defined under CFTC  regulations,  or, in the case of long positions,  that the
value of such  positions not exceed an amount of segregated  funds  determined
by  reference  to certain  cash and  securities  positions  maintained  by the
Portfolio and accrued  profits on such positions.  In addition,  the Portfolio
may not  purchase or sell any such  instruments  if,  immediately  thereafter,
the sum of the amount of initial margin deposits on the  Portfolio's  existing
futures positions would exceed 5% of the market value of its net assets.
         When the  Portfolio  purchases a futures  contract,  it will maintain
an amount of cash, cash equivalents  (for example,  commercial paper and daily
tender adjustable  notes) or short-term  high-grade fixed income securities in
a  segregated  account  so that the  amount so  segregated  plus the amount of
initial and  variation  margin  held in the  account of its broker  equals the
market value of the futures  contract,  thereby  ensuring that the use of such
futures is unleveraged.
         Risk Factors in  Transactions  in Futures  Contracts.  The particular
municipal  bonds  comprising  the index  underlying  the municipal  bond index
futures  contract may vary from the bonds held by the Portfolio.  In addition,
the securities  underlying futures contracts on U.S. Treasury  securities will
not be the  same  as  securities  held  by the  Portfolio.  As a  result,  the
Portfolio's  ability  effectively  to hedge all or a  portion  of the value of
its municipal  bonds through the use of futures  contracts will depend in part
on the degree to which price  movements in the index  underlying the municipal
bond  index  futures  contract,  or the U.S.  Treasury  securities  underlying
other  futures  contracts  trade,   correlate  with  price  movements  of  the
municipal bonds held by the Portfolio.
         For  example,  where  prices of  securities  in the  Portfolio do not
move  in the  same  direction  or to the  same  extent  as the  values  of the
securities  or index  underlying  a  futures  contract,  the  trading  of such
futures  contracts may not effectively  hedge the Portfolio's  investments and
may result in trading  losses.  The correlation may be affected by disparities
in  the  average  maturity,  ratings,  geographical  mix or  structure  of the
Portfolio's  investments  as  compared  to those  comprising  the  index,  and
general economic or political factors.  In addition,  the correlation  between
movements  in the value of the index  underlying  a  futures  contract  may be
subject to change over time,  as  additions  to and  deletions  from the index
alter  its  structure.  In the  case of  futures  contracts  on U.S.  Treasury
securities  and  options  thereon,   the  anticipated   correlation  of  price
movements  between  the U.S.  Treasury  securities  underlying  the futures or
options  and   municipal   bonds  may  be  adversely   affected  by  economic,
political,  legislative or other  developments that have a disparate impact on
the respective  markets for such securities.  In the event that the Investment
Advisor  determines to enter into  transactions in financial futures contracts
other  than the  municipal  bond  index  futures  contract  or futures on U.S.
Treasury  securities,  the risk of imperfect  correlation between movements in
the prices of such futures  contracts  and the prices of municipal  bonds held
by the Portfolio may be greater.
         The trading of futures  contracts  on an index also  entails the risk
of  imperfect  correlation  between  movements  in the  price  of the  futures
contract  and the  value  of the  underlying  index.  The  anticipated  spread
between the prices may be distorted  due to  differences  in the nature of the
markets,  such as margin  requirements,  liquidity  and the  participation  of
speculators  in the  futures  markets.  The  risk  of  imperfect  correlation,
however,  generally  diminishes as the delivery month specified in the futures
contract approaches.
         Prior to exercise or expiration,  a position in futures  contracts or
options  thereon may be terminated  only by entering  into a closing  purchase
or  sale  transaction.  This  requires  a  secondary  market  to the  relevant
contract  market.  The Portfolio will enter into a futures or option  position
only if there  appears  to be a liquid  secondary  market  therefor,  although
there can be no assurance that such a liquid  secondary  market will exist for
any  particular  contract at any specific  time.  Thus, it may not be possible
to  close  out  a  position   once  it  has  been   established.   Under  such
circumstances,  the Portfolio could be required to make continuing  daily cash
payments  of  variation  margin in the event of adverse  price  movements.  In
such  situation,  if the Portfolio has  insufficient  cash, it may be required
to sell portfolio  securities to meet daily variation  margin  requirements at
a time when it may be  disadvantageous  to do so. In addition,  the  Portfolio
may be  required  to  perform  under  the  terms  of  the  futures  or  option
contracts it holds.  The  inability to close out futures or options  positions
also could have an adverse impact on the  Portfolio's  ability  effectively to
hedge its portfolio.
         When the  Portfolio  purchases an option on a futures  contract,  its
risk is  limited  to the  amount  of the  premium,  plus  related  transaction
costs,  although  this entire  amount may be lost.  In  addition,  in order to
profit from the  purchase of an option on a futures  contract,  the  Portfolio
may be required to exercise the option and  liquidate the  underlying  futures
contract,  subject  to the  availability  of a liquid  secondary  market.  The
trading of options on futures  contracts  also  entails the risk that  changes
in the value of the underlying  futures  contract will not be fully  reflected
in the  value  of the  option,  although  the  risk of  imperfect  correlation
generally  tends to diminish as the maturity  date of the futures  contract or
expiration date of the option approaches.
         "Trading  Limits"  or  "Position  Limits"  may also be imposed on the
maximum  number of  contracts  which any  person may hold at a given  time.  A
contract  market  may  order  the  liquidation  of  positions  found  to be in
violation of these limits and it may impose other  sanctions or  restrictions.
The  Investment  Advisor does not believe  that  trading  limits will have any
adverse impact on the strategies for hedging the Portfolio's investments.
         Further,  the trading of futures  contracts is subject to the risk of
the insolvency of a brokerage firm or clearing  corporation,  which could make
it  difficult or  impossible  to  liquidate  existing  positions or to recover
excess variation margin payments.
         In  addition  to the  risks of  imperfect  correlation  and lack of a
liquid  secondary  market  for  such  instruments,   transactions  in  futures
contracts   involve  risks  related  to  leveraging   and  the  potential  for
incorrect  forecasts of the direction  and extent of interest  rate  movements
within a given time frame.

INVESTMENT RESTRICTIONS

Fundamental Investment Restrictions
         The  Portfolio  has  adopted  the  following  fundamental  investment
restrictions.  These  restrictions  cannot be changed  without the approval of
the holders of a majority of the outstanding shares of the Portfolio.

         (1) The Portfolio may not make any  investment  inconsistent
         with  its  classification  as  a  nondiversified  investment
         company under the 1940 Act.
         (2) The Portfolio may not  concentrate  its  investments  in
         the   securities  of  issuers   primarily   engaged  in  any
         particular   industry  (other  than  securities   issued  or
         guaranteed  by  the  U.S.  Government  or  its  agencies  or
         instrumentalities    and   repurchase   agreements   secured
         thereby, or domestic bank money market instruments.)
         (3)  The  Portfolio  may  not  issue  senior  securities  or
         borrow  money,  except from banks for temporary or emergency
         purposes  and then  only in an  amount  up to 33 1/3% of the
         value  of its  total  assets  or as  permitted  by  law  and
         except by engaging in reverse repurchase  agreements,  where
         allowed.  In order to secure any  permitted  borrowings  and
         reverse  repurchase   agreements  under  this  section,  the
         Portfolio may pledge, mortgage or hypothecate its assets.
         (4) The  Portfolio  may not  underwrite  the  securities  of
         other  issuers,  except as  allowed  by law or to the extent
         that the purchase of  municipal  obligations  in  accordance
         with  its   investment   objective  and   policies,   either
         directly  from the  issuer,  or from an  underwriter  for an
         issuer, may be deemed an underwriting.
         (5) The  Portfolio  may not invest  directly in  commodities
         or real estate,  although it may invest in securities  which
         are  secured by real  estate or real  estate  mortgages  and
         securities of issuers  which invest or deal in  commodities,
         commodity futures, real estate or real estate mortgages.
         (6) The  Portfolio  may not make loans,  other than  through
         the  purchase of money  market  instruments  and  repurchase
         agreements  or by  the  purchase  of  bonds,  debentures  or
         other  debt   securities,   or  as  permitted  by  law.  The
         purchase  of all or a  portion  of an issue of  publicly  or
         privately  distributed  debt  obligations in accordance with
         its investment objective,  policies and restrictions,  shall
         not constitute the making of a loan.

Nonfundamental Investment Restrictions
         The  Board of  Trustees  has  adopted  the  following  nonfundamental
investment  restrictions.  A  nonfundamental  investment  restriction  can  be
changed by the Board at any time without a shareholder vote.

         (1)  The   Portfolio   may  not  purchase   common   stocks,
         preferred stocks, warrants, or other equity securities.
         (2) The  Portfolio  does not intend to make any purchases of
         securities if borrowing exceeds 5% of its total assets.
         (3) The Portfolio may not sell  securities  short,  purchase
         securities  on  margin,  or  write or  purchase  put or call
         options,    except   as   permitted   in   connection   with
         transactions in futures  contracts and options thereon.  The
         Portfolio  reserves  the right to purchase  securities  with
         puts attached or with demand features.
         (4)  The  Portfolio  may not  invest  more  than  35% of net
         assets  in   non-investment   grade  debt  securities.   The
         Portfolio  does not intend to  purchase  more than 15% of in
         non-investment grade debt securities.
         (5) The  Portfolio may not purchase  illiquid  securities if
         more than 10% of the  value of the  Portfolio's  net  assets
         would be invested in such securities.

PURCHASES AND REDEMPTIONS OF SHARES

         Share  certificates  will not be issued  unless  requested in writing
by the investor.  No charge will be made for share  certificate  requests.  No
certificates will be issued for fractional shares.
         Amounts  redeemed by check  redemption  may be mailed to the investor
without  charge.  Amounts  of more  than $50 and  less  than  $300,000  may be
transferred  electronically  at no charge to the  investor.  Amounts of $1,000
or more  will be  transmitted  by  wire,  without  charge,  to the  investor's
account  at a  domestic  commercial  bank  that  is a  member  of the  Federal
Reserve System or to a  correspondent  bank. A charge of $5 is imposed on wire
transfers  of less  than  $1,000.  If the  investor's  bank  is not a  Federal
Reserve System member,  failure of immediate  notification to that bank by the
correspondent  bank  could  result  in a delay in  crediting  the funds to the
investor's bank account.
         Telephone  redemption  requests which would require the redemption of
shares  purchased by check or electronic  funds  transfer  within the previous
10 business  days may not be honored.  The Fund  reserves  the right to modify
the telephone redemption privilege.
         To change redemption  instructions  already given,  shareholders must
send a written  notice  to  Calvert  Group,  c/o  NFDS,  330 West 9th  Street,
Kansas  City,  MO 64105,  with a voided  copy of a check  for the bank  wiring
instructions  to be added.  If a voided check does not  accompany the request,
then the request must be signature  guaranteed by a commercial  bank,  savings
and loan association,  trust company,  member firm of any national  securities
exchange,  or certain credit  unions.  Further  documentation  may be required
from corporations, fiduciaries, and institutional investors.
         The  right of  redemption  may be  suspended  or the date of  payment
postponed  for any period  during which the New York Stock  Exchange is closed
(other than customary weekend and holiday  closings),  when trading on the New
York Stock Exchange is restricted,  or an emergency  exists,  as determined by
the  SEC,  or if  the  Commission  has  ordered  such  a  suspension  for  the
protection of shareholders.  Redemption  proceeds are normally mailed or wired
the next  business day after a proper  redemption  request has been  received,
unless redemptions have been suspended or postponed as described above.
         Redemption  proceeds  are  normally  paid  in  cash.   However,   the
Portfolio  has the  right to  redeem  shares  in  assets  other  than cash for
redemption  amounts  exceeding,  in any 90-day  period,  $250,000 or 1% of the
net asset value of the Portfolio, whichever is less.

DIVIDENDS, DISTRIBUTIONS AND TAX MATTERS

         The   Portfolio   intends  to  continue   to  qualify  as   regulated
investment  companies under  Subchapter M of the Internal Revenue Code. If for
any  reason  the  Portfolio  should  fail to  qualify,  it would be taxed as a
corporation  at the fund  level,  rather than  passing  through its income and
gains to shareholders.
         The Portfolio  declares and pays monthly  dividends of its net income
to  shareholders  of  record as of the close of  business  on each  designated
monthly  record date. Net investment  income  consists of the interest  income
earned on investments  (adjusted for  amortization of original issue discounts
or premiums or market premiums), less estimated expenses.
         Dividends  are  automatically   reinvested  at  net  asset  value  in
additional  shares.  Shareholders  may  elect  to  have  their  dividends  and
distributions  paid out monthly in cash.  Capital gains,  if any, are normally
paid once a year and will be  automatically  reinvested  at net asset value in
additional  shares,  unless you choose  otherwise.  You may elect to have your
dividends  and  distributions  paid out monthly in cash.  You may also request
to have your  dividends  and  distributions  from the  Portfolio  invested  in
shares  of any  other  Calvert  Group  Fund,  to be  invested  in that Fund or
Portfolio without a sales charge.
         The  Portfolio's   dividends  of  net  investment  income  constitute
exempt-interest  dividends on which  shareholders are not generally subject to
federal  or Vermont  state  income  tax;  however,  under the Code,  dividends
attributable  to interest on certain  private  activity bonds must be included
in federal  alternative  minimum taxable income for the purpose of determining
liability  (if any) for  individuals  and for  corporations.  The  Portfolio's
dividends  derived from taxable  interest and  distributions of net short-term
capital gains whether  taken in cash or reinvested in additional  shares,  are
taxable  to  shareholders  as  ordinary  income  and do not  qualify  for  the
dividends received deduction for corporations.
         The  Code  provides  that  interest  on   indebtedness   incurred  or
continued  in order to  purchase  or carry  shares of a  regulated  investment
company which  distributes  exempt-interest  dividends  during the year is not
deductible.  Furthermore,  entities or persons who are "substantial users" (or
persons  related to  "substantial  users") of  facilities  financed by private
activity bonds should consult their tax advisers before  purchasing  shares of
the  Portfolio.  "Substantial  user"  is  generally  defined  as  including  a
"non-exempt  person"  who  regularly  uses in  trade or  business  a part of a
facility financed from the proceeds of private activity bonds.
         Investors  should  note  that  the  Code  may  require  investors  to
exclude the initial  sales  charge,  if any, paid on the purchase of Portfolio
shares  from the tax basis of those  shares if the  shares are  exchanged  for
shares  of  another  Calvert  Group  Fund  within  90 days of  purchase.  This
requirement  applies  only to the  extent  that the  payment  of the  original
sales  charge on the shares of the  Portfolio  causes a reduction in the sales
charge  otherwise  payable on the shares of the Calvert Group Fund acquired in
the exchange,  and  investors may treat sales charges  excluded from the basis
of the original shares as incurred to acquire the new shares.
         The  Portfolio is required to withhold 31% of any  long-term  capital
gain  dividends  and  31% of  each  redemption  transaction  occurring  in the
Portfolio if: (a) the  shareholder's  social security number or other taxpayer
identification  number ("TIN") is not provided,  or an obviously incorrect TIN
is provided;  (b) the shareholder  does not certify under penalties of perjury
that  the  TIN  provided  is  the  shareholder's  correct  TIN  and  that  the
shareholder is not subject to backup  withholding under section  3406(a)(1)(C)
of  the  Code  because  of   underreporting   (however,   failure  to  provide
certification  as to the  application  of section  3406(a)(1)(C)  will  result
only in backup  withholding on capital gain  dividends,  not on  redemptions);
or (c) the Fund is  notified  by the  Internal  Revenue  Service  that the TIN
provided   by  the   shareholder   is   incorrect   or  that  there  has  been
underreporting   of  interest  or  dividends  by  the  shareholder.   Affected
shareholders will receive  statements at least annually  specifying the amount
withheld.
         In  addition,  the  Portfolio  is required to report to the  Internal
Revenue  Service  the  following   information   with  respect  to  redemption
transactions in the Portfolio:  (a) the shareholder's name,  address,  account
number and taxpayer  identification  number; (b) the total dollar value of the
redemptions; and (c) the Portfolio's identifying CUSIP number.
         Certain   shareholders   are,   however,   exempt   from  the  backup
withholding and broker reporting  requirements.  Exempt shareholders  include:
corporations;  financial institutions;  tax-exempt  organizations;  individual
retirement  plans;  the  U.S.,  a State,  the  District  of  Columbia,  a U.S.
possession,  a  foreign  government,  an  international  organization,  or any
political  subdivision,  agency  or  instrumentality  of any of the  foregoing
U.S.  registered  commodities or securities  dealers;  real estate  investment
trusts;  registered  investment  companies;  bank common trust funds;  certain
charitable  trusts;  and foreign central banks of issue.  Non-resident  aliens
also are generally not subject to either  requirement  but, along with certain
foreign  partnerships  and  foreign  corporations,  may  instead be subject to
withholding under section 1441 of the Code.  Shareholders  claiming  exemption
from  backup  withholding  and  broker  reporting  should  call or  write  the
Portfolio for further information.

                             VALUATION OF SHARES

         The  Portfolio's  assets are normally  valued  utilizing  the average
bid dealer market  quotation as furnished by an independent  pricing  service.
Securities  and other  assets  for which  market  quotations  are not  readily
available  are valued based on the current  market for similar  securities  or
assets,  as  determined  in good faith by the  Portfolio's  Advisor  under the
supervision of the Board of Trustees.  The Portfolio  determines the net asset
value of its shares  every  business  day at the close of the regular  session
of the New York Stock Exchange  (generally,  4:00 p.m.  Eastern time),  and at
such other times as may be necessary or  appropriate.  The Portfolio  does not
determine  net asset  value on  certain  national  holidays  or other  days on
which the New York Stock  Exchange is closed:  New Year's Day,  Martin  Luther
King Day,  Presidents'  Day,  Good Friday,  Memorial  Day,  Independence  Day,
Labor Day, Thanksgiving Day and Christmas Day.
         Valuations,  market  quotations and market  equivalents  are provided
the Portfolio by Kenny S&P Evaluation  Services,  a subsidiary of McGraw-Hill.
The use of Kenny as a pricing  service by the  Portfolio  has been approved by
the Board of Trustees.  Valuations  provided by Kenny are  determined  without
exclusive  reliance on quoted prices and take into  consideration  appropriate
factors  such as  institution-size  trading in similar  groups of  securities,
yield,   quality,    coupon   rate,   maturity,   type   of   issue,   trading
characteristics, and other market data.

Net Asset Value and Offering Price Per Share
                                            Net asset value per share
         ($51,292,397/3,150,493 shares)                       $16.28
         Maximum sales charge
         (3.75% of offering price)                               0.63
         Offering price per share                             $16.91

CALCULATION OF YIELD AND TOTAL RETURN

         From time to time,  the  Portfolio  advertises  its  "total  return."
Total return is  historical  in nature and is not intended to indicate  future
performance.  Total  return  will be  quoted  for  the  most  recent  one-year
period,  five-year  period and the period from  inception  of the  Portfolio's
offering  of shares.  Total  return  quotations  for  periods in excess of one
year  represent  the average  annual total  return for the period  included in
the particular  quotation.  Total return is a computation  of the  Portfolio's
dividend yield plus or minus realized or unrealized  capital  appreciation  or
depreciation,  less fees and  expenses.  All total return  quotations  reflect
the  deduction of the  Portfolio's  maximum  sales  charge for shares,  except
quotations  of "return  without  maximum  load," which do not deduct the sales
charge.  Thus, in the formula below,  for return without maximum load, P = the
entire  $1,000  hypothetical  initial  investment  and  does not  reflect  the
deduction  of  any  sales  charge.  Note:  "Total  Return"  as  quoted  in the
Financial  Highlights  section of the Fund's  Prospectus  and Annual Report to
Shareholders,  however,  per SEC  instructions,  does not reflect deduction of
the  sales  charge,  and  corresponds  to  "return  without  maximum  load" as
referred to herein.  Return without  maximum load should be considered only by
investors,  such as  participants  in certain pension plans, to whom the sales
charge does not apply,  or for  purposes of  comparison  only with  comparable
figures  which also do not reflect  sales  charges,  such as Lipper  averages.
Total return is computed according to the following formula:

                                P(1 +T)n = ERV

where P = a  hypothetical  initial  payment of $1,000 (less the maximum  sales
charge  imposed  during the  period);  T = average  annual total  return;  n =
number  of years  and ERV = the  ending  redeemable  value  of a  hypothetical
$1,000  payment  made at the  beginning of the 1, 5, or 10 year periods at the
end of such periods (or portions thereof if applicable).
         Returns for the periods indicated are as follows:

Periods Ended
December 31, 1998          with Max Load             w/o Max Load

One Year                   1.71%                     5.67%
Five Years                 4.66%                     5.46%
From Inception             6.47%                     N/A
(April 1, 1991)

         The Portfolio  also  advertises,  from time to time,  its "yield" and
"tax  equivalent  yield."  As  with  total  return,  both  yield  figures  are
historical  and are not  intended  to  indicate  future  performance.  "Yield"
quotations  for each class refer to the  aggregate  imputed  yield-to-maturity
of each of the  Portfolio's  investments  based on the market  value as of the
last day of a given  thirty-day  or one-month  period,  less  expenses (net of
reimbursement),  divided by the average  daily  number of  outstanding  shares
entitled to receive  dividends  times the maximum  offering  price on the last
day of the period (so that the effect of the sales  charge is  included in the
calculation),  compounded on a "bond  equivalent," or semi-annual,  basis. The
Portfolio's yield is computed according to the following formula:

Yield = 2[(a-b/cd) +1)6 - 1]

where a =  dividends  and  interest  earned  during the  period;  b = expenses
accrued for the period (net of  reimbursement);  c = the average  daily number
of shares  outstanding  during  the  period  that  were  entitled  to  receive
dividends;  and d = the  maximum  offering  price per share on the last day of
the  period.  Using  this  calculation,  the  Portfolio's  yield for the month
ended December 31, 1998 was 4.12%.
         The tax  equivalent  yield is the yield an investor would be required
to obtain from taxable  investments to equal the Portfolio's  yield,  all or a
portion of which may be exempt from federal  income taxes.  The tax equivalent
yield is  computed  per class by taking the  portion of the yield  exempt from
federal income tax and  multiplying  the exempt yield by a factor based upon a
stated  income  tax rate,  then  adding  the  portion of the yield that is not
exempt from federal  income  taxes.  The factor which is used to calculate the
tax equivalent  yield is the  reciprocal of the  difference  between 1 and the
applicable income tax rates, which will be stated in the advertisement.
         For the  thirty-day  period ended  December  31,  1998,  based on the
4.12%  yield  above,  the  federal  tax  equivalent  yield  was  6.44%  for an
investor in the 36% federal  income tax bracket,  and 6.82% for an investor in
the 39.6% federal income tax bracket.

                                 ADVERTISING

         The Fund or its affiliates may provide  information  such as, but not
limited  to,  the  economy,   investment   climate,   investment   principles,
sociological  conditions  and  political  ambiance.   Discussion  may  include
hypothetical  scenarios  or  lists of  relevant  factors  designed  to aid the
investor in  determining  whether the Fund is compatible  with the  investor's
goals.  The Fund may list  portfolio  holdings or give  examples or securities
that may have been  considered  for inclusion in the  Portfolio,  whether held
or not.
         The Fund or its affiliates may supply  comparative  performance  data
and rankings from  independent  sources such as Donoghue's  Money Fund Report,
Bank Rate Monitor,  Money,  Forbes,  Lipper  Analytical  Services,  Inc.,  CDA
Investment  Technologies,  Inc.,  Wiesenberger  Investment  Companies Service,
Russell  2000/Small  Stock  Index,  Mutual  Fund Values  Morningstar  Ratings,
Mutual Fund  Forecaster,  Barron's,  The Wall Street  Journal,  and Schabacker
Investment  Management,  Inc.  Such  averages  generally  do not  reflect  any
front-  or  back-end  sales  charges  that  may be  charged  by  Funds in that
grouping.  The Fund may also cite to any source,  whether in print or on-line,
such as Bloomberg,  in order to acknowledge  origin of  information.  The Fund
may compare  itself or its portfolio  holdings to other  investments,  whether
or not issued or  regulated by the  securities  industry,  including,  but not
limited  to,  certificates  of  deposit  and  Treasury  notes.  The Fund,  its
Advisor,  and its affiliates reserve the right to update performance  rankings
as new rankings become available.
         Calvert   Group  is  the   nation's   leading   family  of   socially
responsible  mutual funds, both in terms of socially  responsible  mutual fund
assets  under  management,  and number of  socially  responsible  mutual  fund
portfolios  offered  (source:  Social  Investment  Forum,  December 31, 1998).
Calvert  Group was also the first to offer a family  of  socially  responsible
mutual fund portfolios.

TRUSTEES AND OFFICERS

         The Fund's Board of Trustees supervises the Fund's activities and
reviews its contracts with companies that provide it with services.
         RICHARD  L.  BAIRD,  JR.,  Trustee.   Mr.  Baird  is  Executive  Vice
President for the Family Health Council, Inc. in Pittsburgh,  Pennsylvania,  a
non-profit  corporation  which provides family planning  services,  nutrition,
maternal/child  health care, and various health screening services.  Mr. Baird
is a  trustee/director  of each of the  investment  companies  in the  Calvert
Group of Funds,  except for Calvert Variable Series,  Inc.,  Calvert New World
Fund, Inc. and Calvert World Values Fund,  Inc. DOB:  05/09/48.  Address:  211
Overlook Drive, Pittsburgh, Pennsylvania 15216.
         FRANK H. BLATZ,  JR.,  Esq.,  Trustee.  Mr. Blatz is a partner in the
law firm of Snevily,  Ely,  Williams & Blatz.  He was  formerly a partner with
Abrams,  Blatz,  Gran,  Hendricks  &  Reina,  P.A.  He is also a  director  of
Calvert Variable Series, Inc. DOB: 10/29/35.  Address:  308 East Broad Street,
Westfield, New Jersey 07091.
         FREDERICK T. BORTS, M.D., Trustee. Dr. Borts is a radiologist with
Kaiser Permanente. Prior to that, he was a radiologist at Bethlehem Medical
Imaging in Allentown, Pennsylvania. DOB: 07/23/49. Address: 16 Iliahi
Street, Honolulu, Hawaii, 96817.
         CHARLES E. DIEHL,  Trustee.  Mr. Diehl is a self-employed  consultant
and  is  Vice  President  and  Treasurer  Emeritus  of the  George  Washington
University.   He  has  retired  from  University  Support  Services,  Inc.  of
Herndon,  Virginia.  Formerly,  he  was  a  Director  of  Acacia  Mutual  Life
Insurance   Company,   and  is  currently  a  Director  of  Servus   Financial
Corporation.   DOB:  10/13/22.  Address:  1658  Quail  Hollow  Court,  McLean,
Virginia 22101.
         DOUGLAS E. FELDMAN,  M.D.,  Trustee.  Dr. Feldman is managing partner
of  Feldman  Otolaryngology,  Head and Neck  Surgery  in  Washington,  D.C.  A
graduate  of  Harvard   Medical   School,   he  is   Associate   Professor  of
Otolaryngology,  Head and Neck  Surgery at  Georgetown  University  and George
Washington  University  Medical School, and past Chairman of the Department of
Otolaryngology,  Head and Neck Surgery at the Washington  Hospital Center.  He
is  included in The Best  Doctors in America.  DOB:  05/23/48.  Address:  7536
Pepperell Drive, Bethesda, Maryland 20817.
         PETER W. GAVIAN,  CFA, Trustee.  Mr. Gavian is President of Corporate
Finance of  Washington,  Inc.  Formerly,  he was a principal of Gavian De Vaux
Associates,  an  investment  banking  firm.  He is also a Chartered  Financial
Analyst and an accredited senior business appraiser.  DOB: 12/08/32.  Address:
3005 Franklin Road North, Arlington, Virginia 22201.
         JOHN G. GUFFEY,  JR., Trustee.  Mr. Guffey is organizing  director of
the Community Capital Bank in Brooklyn,  New York, and a financial  consultant
to various  organizations.  In  addition,  he is a director  of the  Community
Bankers Mutual Fund of Denver,  Colorado,  a director of Ariel Funds,  and the
Treasurer  and Director of Silby,  Guffey,  and Co.,  Inc., a venture  capital
firm.  Mr.  Guffey  is a  trustee/director  of  each of the  other  investment
companies in the Calvert Group of Funds,  except for Calvert  Variable Series,
Inc. and Calvert New World Fund, Inc.
        Mr.  Guffey  has  been  advised  that  the   Securities  and  Exchange
Commission  ("SEC")  has entered an order  against him  relating to his former
service as a director of  Community  Bankers  Mutual Fund,  Inc.  This fund is
not  connected  with  any  Calvert  Fund  or  the  Calvert  Group  and  ceased
operations  in  September,  1994.  Mr.  Guffey  consented  to the entry of the
order  without  admitting  or denying  the  findings  in the order.  The order
contains  findings (1) that the Community  Bankers  Mutual  Fund's  prospectus
and statement of additional  information  were materially false and misleading
because  they  misstated  or failed to state  material  facts  concerning  the
pricing of fund  shares  and the  percentage  of  illiquid  securities  in the
fund's  portfolio  and  that Mr.  Guffey,  as a member  of the  fund's  board,
should  have  known  of  these   misstatements  and  therefore   violated  the
Securities  Act of 1933;  (2) that the price of the fund's  shares sold to the
public  was not  based  on the  current  net  asset  value of the  shares,  in
violation  of the  Investment  Company  Act of 1940 (the  "Investment  Company
Act");  and (3) that the board of the fund,  including  Mr.  Guffey,  violated
the  Investment  Company Act by  directing  the filing of a  materially  false
registration  statement.  The order  directed  Mr.  Guffey to cease and desist
from  committing or causing  future  violations  and to pay a civil penalty of
$5,000.  The SEC placed no restrictions  on Mr.  Guffey's  continuing to serve
as a Trustee or Director of mutual funds. DOB:  05/15/48.  Address:  388 Calli
Calina, Santa Fe, New Mexico 87501.
         *BARBARA J. KRUMSIEK,  President and Trustee.  Ms. Krumsiek serves as
President,  Chief Executive  Officer and Vice Chairman of Calvert Group,  Ltd.
and as an officer and director of each of its affiliated  companies.  She is a
director of Calvert-Sloan  Advisers,  L.L.C., and a  trustee/director  of each
of the  investment  companies in the Calvert Group of Funds.  Ms.  Krumsiek is
the President of each of the investment  companies,  except for Calvert Social
Investment  Fund, of which she is the Senior Vice President.  Prior to joining
Calvert Group,  Ms.  Krumsiek  served as a Managing  Director of Alliance Fund
Distributors, Inc. DOB: 08/09/52.
         M. CHARITO  KRUVANT,  Trustee.  Ms.  Kruvant is President  and CEO of
Creative  Associates  International,  Inc., a firm that  specializes  in human
resources  development,  information  management,  public  affairs and private
enterprise  development.  She is also a Director of Calvert  Variable  Series,
Inc.,  and  Acacia  Federal  Savings  Bank.  DOB:  12/08/45.   Address:   5301
Wisconsin Avenue, N.W., Washington, D.C. 20015.
         ARTHUR J. PUGH,  Trustee.  Mr. Pugh is a Director of Calvert Variable
Series,  Inc., and serves as a director of Acacia Federal  Savings Bank.  DOB:
09/24/37. Address: 4823 Prestwick Drive, Fairfax, Virginia 22030.
         *DAVID R. ROCHAT,  Senior Vice  President and Trustee.  Mr. Rochat is
Executive Vice President of Calvert Asset Management  Company,  Inc., Director
and Secretary of Grady,  Berwald and Co.,  Inc., and Director and President of
Chelsea  Securities,  Inc. He is the Senior Vice  President of First  Variable
Rate Fund,  Calvert Tax-Free  Reserves,  Calvert Municipal Fund, Inc., Calvert
Cash  Reserves,  and  The  Calvert  Fund.  DOB:  10/07/37.  Address:  Box  93,
Chelsea, Vermont 05038.
         *D. WAYNE SILBY, Esq.,  Trustee.  Mr. Silby is a trustee/director  of
each of the  investment  companies in the Calvert  Group of Funds,  except for
Calvert  Variable  Series,  Inc.  and  Calvert New World  Fund.  Mr.  Silby is
Executive  Chairman  of Group  Serve,  Inc.,  an internet  company  focused on
community  building   collaborative  tools,  and  an  officer,   director  and
shareholder  of  Silby,  Guffey &  Company,  Inc.,  which  serves  as  general
partner  of  Calvert  Social  Venture  Partners  ("CSVP").  CSVP is a  venture
capital firm investing in socially  responsible small companies.  He is also a
Director of Acacia Mutual Life  Insurance  Company.  DOB:  07/20/48.  Address:
1715 18th Street, N.W., Washington, D.C. 20009.
         RENO J. MARTINI,  Senior Vice  President.  Mr.  Martini is a director
and Senior Vice  President of Calvert  Group,  Ltd., and Senior Vice President
and Chief  Investment  Officer of Calvert Asset Management  Company,  Inc. Mr.
Martini is also a director and President of  Calvert-Sloan  Advisers,  L.L.C.,
and a director and officer of Calvert New World Fund. DOB: 1/13/50.
         RONALD M.  WOLFSHEIMER,  CPA,  Treasurer.  Mr.  Wolfsheimer is Senior
Vice  President and Chief  Financial  Officer of Calvert  Group,  Ltd. and its
subsidiaries and an officer of each of the other  investment  companies in the
Calvert Group of Funds.  Mr.  Wolfsheimer  is Vice  President and Treasurer of
Calvert-Sloan Advisers,  L.L.C., and a director of Calvert Distributors,  Inc.
DOB: 07/24/47.
         WILLIAM  M.  TARTIKOFF,  Esq.,  Vice  President  and  Secretary.  Mr.
Tartikoff  is an officer of each of the  investment  companies  in the Calvert
Group of Funds, and is Senior Vice President,  Secretary,  and General Counsel
of Calvert Group,  Ltd., and each of its  subsidiaries.  Mr. Tartikoff is also
Vice President and Secretary of  Calvert-Sloan  Advisers,  L.L.C.,  a director
of Calvert  Distributors,  Inc.,  and is an officer  of Acacia  National  Life
Insurance Company. DOB: 08/12/47.
         DANIEL K. HAYES,  Vice  President.  Mr.  Hayes is Vice  President  of
Calvert  Asset  Management  Company,  Inc.,  and is an  officer of each of the
other investment  companies in the Calvert Group of Funds,  except for Calvert
New World Fund, Inc. DOB: 09/09/50.
         SUSAN  WALKER  BENDER,  Esq.,  Assistant  Secretary.  Ms.  Bender  is
Associate  General  Counsel of Calvert  Group,  Ltd. and an officer of each of
its subsidiaries  and  Calvert-Sloan  Advisers,  L.L.C. She is also an officer
of each of the  other  investment  companies  in the  Calvert  Group of Funds.
DOB: 01/29/59.
         KATHERINE STONER, Esq., Assistant Secretary. Ms. Stoner is
Associate General Counsel of Calvert Group and an officer of each of its
subsidiaries and Calvert-Sloan Advisers, L.L.C. She is also an officer of
each of the other investment companies in the Calvert Group of Funds. DOB:
10/21/56.
         IVY WAFFORD DUKE, Esq.,  Assistant  Secretary.  Ms. Duke is Associate
General  Counsel of Calvert  Group and an officer of each of its  subsidiaries
and  Calvert-Sloan  Advisers,  L.L.C.  She is also an  officer  of each of the
other  investment  companies in the Calvert  Group of Funds and  Secretary and
provides  counsel  to the  Calvert  Social  Investment  Foundation.  Prior  to
working  at  Calvert  Group,  Ms.  Duke  was an  Associate  in the  Investment
Management  Group of the Business and Finance  Department at Drinker  Biddle &
Reath. DOB: 09/07/68.
         VICTOR FRYE, Esq.,  Assistant Secretary and Compliance  Officer.  Mr.
Frye is Counsel  and  Compliance  Officer  of Calvert  Group and an officer of
each of its  subsidiaries  and  Calvert-Sloan  Advisers,  L.L.C. He is also an
officer of each of the other  investment  companies  in the  Calvert  Group of
Funds.  Prior to working at Calvert  Group,  Mr.  Frye was Counsel and Manager
of the Compliance Department at The Advisors Group. DOB: 10/15/58.

         The address of directors and officers,  unless  otherwise  noted,  is
4550 Montgomery Avenue, Suite 1000N,  Bethesda,  Maryland 20814.  Trustees and
officers  of the Fund as a group  own less than 1% of the  Fund's  outstanding
shares.  Trustees  marked with an *, above,  are  "interested  persons" of the
Fund, under the Investment Company Act of 1940.
         Each   of   the   above   directors/trustees   and   officers   is  a
director/trustee  or  officer  of  each  of the  investment  companies  in the
Calvert Group of Funds with the exception of Calvert Social  Investment  Fund,
of which only Messrs.  Baird,  Guffey and Silby and Ms. Krumsiek are among the
trustees,  Calvert Variable Series,  Inc., of which only Messrs.  Blatz, Diehl
and Pugh,  Mmes.  Krumsiek and Kruvant are among the directors,  Calvert World
Values Fund,  Inc.,  of which only Messrs.  Guffey and Silby and Ms.  Krumsiek
are among the directors,  and Calvert New World Fund,  Inc., of which only Ms.
Krumsiek and Mr. Martini are among the directors.
         The  Audit  Committee  of the Board is  composed  of  Messrs.  Baird,
Blatz,  Feldman,  Guffey  and Pugh and Ms.  Kruvant.  The  Board's  Investment
Policy  Committee  is composed of Messrs.  Borts,  Diehl,  Gavian,  Rochat and
Silby and Ms. Krumsiek.
         During  1998,  Trustees  of the Fund not  affiliated  with the Fund's
Advisor were paid $5,889 by the Vermont Municipal  Portfolio.  Trustees of the
Fund not  affiliated  with the  Advisor  currently  receive  an annual  fee of
$20,500  for  service  as a member of the  Board of  Trustees  of the  Calvert
Group of Funds  plus a fee of $750 to  $1,500  for each  Board  and  Committee
meeting  attended;  such  fees are  allocated  among the Funds on the basis of
their net assets.
         Trustees  of the Fund not  affiliated  with the  Fund's  Advisor  may
elect to defer  receipt of all or a  percentage  of their fees and invest them
in any fund in the  Calvert  Family of Funds  through  the  Trustees  Deferred
Compensation  Plan (shown as "Pension or Retirement  Benefits  Accrued as part
of Fund  Expenses,"  below).  Deferral of the fees is designed to maintain the
parties in the same position as if the fees were paid on a current basis.

Trustee Compensation Table

Fiscal Year 1998      Aggregate         Pension or   Total Compensation
                      Compensation      Retirement   from Benefits
(unaudited numbers)   from Registrant   Accrued as    Registrant and Fund
                      for Service       part of      Complex paid to
                      as Trustee        of Registrant     Trustee**
                                        Expenses*

Name of Trustee

Richard L. Baird, Jr. $24,732           $0                $39,550
Frank H. Blatz, Jr.   $25,797           $25,797           $42,100
Frederick T. Borts    $23,674           $0                $33,250
Charles E. Diehl      $25,803           $25,803           $41,500
Douglas E. Feldman    $25,797           $0                $36,250
Peter W. Gavian       $25,804           $12,902           $36,250
John G. Guffey, Jr.   $24,768           $0                $62,665
M. Charito Kruvant    $25,797           $15,477           $36,250
Arthur J. Pugh        $25,797           $0                $41,500
D. Wayne Silby        $24,739           $0                $67,780

*Messrs. Blatz, Diehl, Gavian and Pugh and Ms. Kruvant have chosen to defer
a portion of their compensation. As of December 31, 1998, total deferred
compensation, including dividends and capital appreciation, was $644,247.37,
$672,374.09, $172,445.85, $216,322.53, and $23,295.55, for each trustee,
respectively.
**The Fund Complex consists of nine (9) registered investment companies.

                              INVESTMENT ADVISOR

         The Fund's  Investment  Advisor is Calvert Asset Management  Company,
Inc.,  4550  Montgomery  Avenue,  Suite 1000N,  Bethesda,  Maryland  20814,  a
subsidiary  of  Calvert  Group,  Ltd.,  which is a  controlled  subsidiary  of
Ameritas-Acacia Mutual Holding Company.
         The  Advisory  Contract  between the Fund and the Advisor will remain
in effect  indefinitely,  provided  continuance  is approved at least annually
by the vote of the  holders of a  majority  of the  outstanding  shares of the
Fund,  or by  the  Trustees  of the  Fund;  and  further  provided  that  such
continuance  is  also  approved  annually  by the  vote of a  majority  of the
Trustees  of the  Fund  who are not  parties  to the  Contract  or  interested
persons of such  parties,  cast in person at a meeting  called for the purpose
of voting on such  approval.  The Contract may be terminated  without  penalty
by  either  party  on  60  days'  prior  written  notice;   it   automatically
terminates in the event of its assignment.
         Under  the  Contract,   the  Advisor   manages  the   investment  and
reinvestment  of the Fund's  assets,  subject to the  direction and control of
the Fund's Board of Trustees.  For its  services,  the Advisor  receives  from
the  Portfolio  an  annual  fee of  0.60% of the  first  $500  million  of the
Portfolio's  average daily net assets,  0.50% of the next $500 million of such
assets, and 0.40% of all such assets over $1 billion.
         The advisory fee is payable  monthly.  The Advisor reserves the right
(i)  to  waive  all or a part  of its  fee  and  (ii)  to  compensate,  at its
expense,   broker-dealers   in   consideration   of  their   promotional   and
administrative services.
         The Advisor  provides the Fund with  investment  advice and research,
pays the  salaries  and fees of all  Trustees  and  executive  officers of the
Fund who are  principals  of the Advisor,  and pays  certain Fund  advertising
and  promotional  expenses.   The  Fund  pays  all  other  administrative  and
operating  expenses,   including:   custodial  fees;   shareholder  servicing;
dividend  disbursing and transfer  agency fees;  administrative  service fees;
federal and state securities  registration  fees;  insurance  premiums;  trade
association  dues;  interest,  taxes and other business fees;  legal and audit
fees; and brokerage  commissions and other costs  associated with the purchase
and  sale  of  portfolio  securities.  The  gross  advisory  fees  paid to the
Advisor  under the  advisory  contract  for the 1996,  1997,  and 1998  fiscal
years were $340,885, $296,024, and $305,695, respectively.
         The Advisor may  voluntarily  reimburse  the  Portfolio for expenses.
For the 1996,  1997,  and 1998 fiscal years,  the  reimbursement  was $18,498,
$0, and $0, respectively.

                           ADMINISTRATIVE SERVICES

         Calvert  Administrative  Services  Company  ("CASC"),  a wholly-owned
subsidiary of Calvert  Group,  Ltd.,  has been retained by the Fund to provide
certain  administrative  services  necessary  to the  conduct  of  the  Fund's
affairs.  Prior to August 1, 1997,  CASC  received a fee of $200,000  per year
for providing  such  services,  allocated  among  Portfolios  based on assets.
Effective  August 1, 1997,  the fee structure  changed.  Exclusive of the CTFR
Money  Market  Portfolio,  the Fund pays an annual fee of  $80,000,  allocated
between the remaining  Portfolios based on assets. The administrative  service
fees paid by the  Portfolio  to CASC for fiscal  years  1996,  1997,  and 1998
were $4,156, $4,004, and $4,127, respectively.

TRANSFER AND SHAREHOLDER SERVICING AGENTS

         National Financial Data Services,  Inc. ("NFDS"),  330 W. 9th Street,
Kansas City,  Missouri  64105, a subsidiary of State Street Bank & Trust,  has
been  retained by the Fund to act as transfer  agent and  dividend  disbursing
agent.  These  responsibilities  include:  responding  to certain  shareholder
inquiries and instructions,  crediting and debiting  shareholder  accounts for
purchases and  redemptions  of Fund shares and confirming  such  transactions,
and  daily  updating  of  shareholder  accounts  to  reflect  declaration  and
payment of dividends.
         Calvert  Shareholder   Services,   Inc.  ("CSSI"),   4550  Montgomery
Avenue,  Bethesda,  Maryland  20814, a subsidiary of Calvert Group,  Ltd., has
been retained by the Fund to act as shareholder  servicing agent.  Shareholder
servicing  responsibilities  include  responding to shareholder  inquiries and
instructions  concerning their accounts,  entering any telephoned purchases or
redemptions  into the NFDS system,  maintenance  of  broker-dealer  data,  and
preparing  and  distributing   statements  to  shareholders   regarding  their
accounts.  Calvert  Shareholder  Services,  Inc. was the sole  transfer  agent
prior to January 1, 1998.
         For these  services,  NFDS and  Calvert  Shareholder  Services,  Inc.
receive a fee based on the  number of  shareholder  accounts  and  shareholder
transactions.

INDEPENDENT ACCOUNTANTS AND CUSTODIANS

         PricewaterhouseCoopers   LLP,  250  West  Pratt  Street,   Baltimore,
Maryland  21201,  has  been  selected  by the  Board of  Trustees  to serve as
independent  accountants  of the Fund for  fiscal  year  1998.  State Bank and
Trust  Company,   N.A.,  225  Franklin  Street,  Boston,  MA  02110,  acts  as
custodian of the  Portfolio's  investments.  First  National Bank of Maryland,
25 South Charles  Street,  Baltimore,  Maryland 21203 also serves as custodian
of  certain of the  Fund's  cash  assets.  Neither  custodian  has any part in
deciding  the  Portfolio's  investment  policies  or the choice of  securities
that are to be purchased or sold by the Portfolio.

METHOD OF DISTRIBUTION

         The  Portfolio  has entered into a principal  underwriting  agreement
with  Calvert  Distributors,  Inc.  ("CDI").  Pursuant to the  agreement,  CDI
serves as distributor and principal  underwriter for the Portfolio.  CDI bears
all its expenses of providing  services  pursuant to the agreement,  including
payment of any commissions and service fees.

CTFR Vermont Municipal
Shares are offered at net asset value plus a front-end sales charge as
follows:

                           As a % of      As a % of       Allowed to
Amount of                  offering       net amount      Brokers as a %
Investment                 price          invested        of offering price
Less than $50,000          3.75%          3.90%           3.00%
$50,000 but
  less than $100,000       3.00%          3.09%           2.25%
$100,000 but
  less than $250,000       2.25%          2.30%           1.75%
$250,000 but
  less than $500,000       1.75%          1.78%           1.25%
$500,000 but
  less than $1,000,000     1.00%          1.01%           0.80%
$1,000,000 and over        0.00%          0.00%           0.00%

         CDI receives any front-end  sales charge.  A portion of the front-end
sales  charge may be  reallowed  to  dealers.  The  aggregate  amount of sales
charges (gross  underwriting  commissions)  and the net amount retained by CDI
(i.e., not reallowed to dealers) for the last 3 fiscal years are:

Fiscal Year                 1996                        1997
                    Gross           Net           Gross          Net
                    $46,256         $28,339       $58,265        $25,820

1998
Gross             Net
$63,649           $28,472

         Fund  Trustees and certain other  affiliated  persons of the Fund are
exempt  from the sales  charge  since the  distribution  costs are  minimal to
persons  already  familiar  with the Fund.  Other  groups  are  exempt  due to
economies of scale in distribution. See Exhibit A to the Prospectus.
         The Advisor, at its expense, may incur costs and pay expenses
associated with the distribution of shares of the Portfolio. CDI makes a
continuous offering of the Fund's securities on a "best efforts" basis.

                            PORTFOLIO TRANSACTIONS

         Portfolio   transactions   are  undertaken  on  the  basis  of  their
desirability  from  an  investment   standpoint.   The  Fund's  Advisor  makes
investment  decisions  and  the  choice  of  brokers  and  dealers  under  the
direction and supervision of the Fund's Board of Trustees.
         Broker-dealers  who execute  portfolio  transactions on behalf of the
Fund are  selected  on the basis of their  execution  capability  and  trading
expertise  considering,  among other factors,  the overall  reasonableness  of
the brokerage commissions,  current market conditions,  size and timing of the
order, difficulty of execution, per share price, etc.
         For the last three fiscal years,  total  brokerage  commissions  paid
are as follows:
                               1996              1997             1998
CTFR Vermont Municipal         $0                $0               $0

         The  Fund  did  not  pay  any  brokerage  commissions  to  affiliated
persons during the last three fiscal years.

         While the Fund's  Advisor  select  brokers  primarily on the basis of
best  execution,  in some cases they may direct  transactions to brokers based
on the  quality  and  amount of the  research  and  research-related  services
which the brokers  provide to them.  These  services are of the type described
in  Section  28(e) of the  Securities  Exchange  Act of 1934  and may  include
analyses  of the  business  or  prospects  of a company,  industry or economic
sector,  or  statistical  and  pricing  services.  If, in the  judgment of the
Advisor,  the Fund or other  accounts  managed  by them will be  benefited  by
supplemental   research  services,   they  are  authorized  to  pay  brokerage
commissions  to a broker  furnishing  such  services  which  are in  excess of
commissions  which  another  broker may have  charged for  effecting  the same
transaction.  These  research  services  include  advice,  either  directly or
through  publications  or  writings,  as  to  the  value  of  securities,  the
advisability  of  investing  in,  purchasing  or selling  securities,  and the
availability   of  securities   or   purchasers  or  sellers  of   securities;
furnishing  of  analyses  and  reports  concerning   issuers,   securities  or
industries;  providing  information on economic factors and trends;  assisting
in  determining  portfolio  strategy;  providing  computer  software  used  in
security analyses;  providing portfolio  performance  evaluation and technical
market  analyses;  and providing  other  services  relevant to the  investment
decision  making  process.  It is the policy of the Advisor that such research
services  will be used for the  benefit  of the Fund as well as other  Calvert
Group funds and managed accounts.
         For the fiscal year ended  December 31, 1998,  the Fund,  through its
Advisor, paid $0 in commissions for directed brokerage for research services.

         The Portfolio turnover rates for the last two fiscal years are as
follows:

                           1997                        1998
CTFR Vermont Muni.         14%                         32%

                             GENERAL INFORMATION

         The Portfolio is a series of Calvert  Tax-Free  Reserves (the "Fund")
which was  organized as a  Massachusetts  business  trust on October 20, 1980.
The  other   series  of  the  Fund   include  the  Money   Market   Portfolio,
Limited-Term Portfolio,  Long-Term Portfolio,  and the California Money Market
Portfolio.  The Fund's  Declaration of Trust contains an express disclaimer of
shareholder  liability for acts or obligations  of the Fund. The  shareholders
of  a   Massachusetts   business   trust   might,   however,   under   certain
circumstances,  be held  personally  liable as partners  for its  obligations.
The Declaration of Trust provides for  indemnification  and  reimbursement  of
expenses out of Fund assets for any  shareholder  held  personally  liable for
obligations  of the Fund.  The  Declaration  of Trust  provides  that the Fund
shall,  upon  request,  assume  the  defense  of any claim  made  against  any
shareholder  for any act or  obligation  of the Fund and satisfy any  judgment
thereon.  The  Declaration  of  Trust  further  provides  that  the  Fund  may
maintain appropriate  insurance (for example,  fidelity bonding and errors and
omissions  insurance)  for  the  protection  of the  Fund,  its  shareholders,
Trustees,  officers,  employees,  and agents to cover  possible tort and other
liabilities.  Thus,  the risk of a  shareholder  incurring  financial  loss on
account of  shareholder  liability is limited to  circumstances  in which both
inadequate  insurance  exists  and the  Fund  itself  is  unable  to meet  its
obligations.
         Each  share  of  each  series   represents  an  equal   proportionate
interest  in that  series  with  each  other  share  and is  entitled  to such
dividends  and  distributions  out of the income  belonging  to such series as
declared by the Board.  The Money Market  Portfolio offers Class O (offered in
the Calvert  Tax-Free  Reserves Money Market  Prospectus),  the  Institutional
Class  (offered  in a  separate  prospectus),  and Class T, also  known as The
Advisors Group Tax-Free Reserve Fund (offered in a separate prospectus).
         The Fund is not  required to hold annual  shareholder  meetings,  but
special  meetings  may  be  called  for  certain  purposes  such  as  electing
Trustees,  changing fundamental  policies, or approving a management contract.
As a shareholder, you receive one vote for each share you own.

CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES

         As of April 20, 1999, the following  shareholders  owned of record 5%
or more of the Fund:

         Name and Address                        % of Ownership

         Merfarm and Co.
         Burlington, Vermont                     7.75%

                                   APPENDIX

Municipal Obligations
         Municipal   obligations  are  debt  obligations   issued  by  states,
cities,  municipalities,  and  their  agencies  to obtain  funds  for  various
public  purposes.  Such purposes  include the  construction of a wide range of
public  facilities,  the refunding of outstanding  obligations,  the obtaining
of funds for  general  operating  expenses,  and the lending of funds to other
public  institutions  and  facilities.  In addition,  certain types of private
activity  bonds are  issued by or on  behalf of public  authorities  to obtain
funds  for many  types of  local,  privately  operated  facilities.  Such debt
instruments  are  considered  municipal  obligations  if the interest  paid on
them is exempt from  federal  income tax in the opinion of bond counsel to the
issuer.  Although the  interest  paid on the  proceeds  from private  activity
bonds  used  for  the  construction,   equipment,  repair  or  improvement  of
privately  operated  industrial  or commercial  facilities  may be exempt from
federal income tax,  current  federal tax law places  substantial  limitations
on the size of such issues.
         Municipal  obligations  are generally  classified as either  "general
obligation" or "revenue"  bonds.  General  obligation bonds are secured by the
issuer's  pledge of its  faith,  credit and  taxing  power for the  payment of
principal  and interest.  Revenue bonds are payable from the revenues  derived
from a  particular  facility or class of  facilities  or, in some cases,  from
the  proceeds of a special  excise tax or other  specific  revenue  source but
not from the general taxing power.  Tax-exempt  private  activity bonds are in
most cases revenue  bonds and do not generally  carry the pledge of the credit
of  the  issuing  municipality.  There  are,  of  course,  variations  in  the
security of  municipal  obligations  both within a  particular  classification
and among classifications.
         Municipal  obligations are generally  traded on the basis of a quoted
yield  to  maturity,  and  the  price  of the  security  is  adjusted  so that
relative  to the stated  rate of  interest  it will  return the quoted rate to
the purchaser.
         Short-term  and  limited-term   municipal   obligations  include  Tax
Anticipation  Notes,  Revenue  Anticipation  Notes  Bond  Anticipation  Notes,
Construction   Loan  Notes,  and  Discount  Notes.  The  maturities  of  these
instruments  at the time of issue  generally  will range  between three months
and one year.  Pre-Refunded  Bonds with longer nominal maturities that are due
to be retired  with the  proceeds  of an escrowed  subsequent  issue at a date
within  one  year  and  three  years  of the  time  of  acquisition  are  also
considered short-term and limited-term municipal obligations.

Municipal Bond and Note Ratings
Description  of  Moody's  Investors  Service,  Inc.'s  ratings  of  state  and
municipal notes:
         Moody's  ratings for state and municipal  notes and other  short-term
obligations   are  designated   Moody's   Investment   Grade   ("MIG").   This
distinction is in recognition of the  differences  between  short-term  credit
risk and long-term risk.
         MIG 1:  Notes  bearing  this  designation  are of the  best  quality,
enjoying  strong  protection  from  established  cash flows of funds for their
servicing  or from  established  and  broad-based  access  to the  market  for
refinancing, or both.
         MIG2:  Notes  bearing  this  designation  are of high  quality,  with
margins of protection ample although not so large as in the preceding group.
         MIG3: Notes bearing this designation are of favorable  quality,  with
all security  elements  accounted for but lacking the  undeniable  strength of
the  preceding  grades.  Market  access for  refinancing,  in  particular,  is
likely to be less well established.
         MIG4:  Notes  bearing  this  designation  are  of  adequate  quality,
carrying  specific risk but having  protection  commonly  regarded as required
of an investment security and not distinctly or predominantly speculative.

Description of Moody's  Investors  Service  Inc.'s/Standard & Poor's municipal
bond ratings:
         Aaa/AAA:  Best  quality.  These  bonds carry the  smallest  degree of
investment  risk  and are  generally  referred  to as  "gilt  edge."  Interest
payments are  protected by a large or by an  exceptionally  stable  margin and
principal is secure.  This rating  indicates an extremely  strong  capacity to
pay principal and interest.
         Aa/AA:   Bonds   rated  AA  also   qualify   as   high-quality   debt
obligations.  Capacity to pay  principal  and interest is very strong,  and in
the  majority of instances  they differ from AAA issues only in small  degree.
They are rated lower than the best bonds  because  margins of  protection  may
not be as large as in Aaa securities,  fluctuation of protective  elements may
be of greater  amplitude,  or there may be other  elements  present which make
long-term risks appear somewhat larger than in Aaa securities.
         A/A:  Upper-medium  grade  obligations.  Factors  giving  security to
principal and interest are  considered  adequate,  but elements may be present
which  make the bond  somewhat  more  susceptible  to the  adverse  effects of
circumstances and economic conditions.
         Baa/BBB:   Medium  grade   obligations;   adequate  capacity  to  pay
principal and  interest.  Whereas they normally  exhibit  adequate  protection
parameters,  adverse economic  conditions or changing  circumstances  are more
likely to lead to a  weakened  capacity  to pay  principal  and  interest  for
bonds in this category than for bonds in the A category.
         Ba/BB,  B/B,  Caa/CCC,  Ca/CC:  Debt  rated  in these  categories  is
regarded  as  predominantly  speculative  with  respect  to  capacity  to  pay
interest  and repay  principal.  There  may be some  large  uncertainties  and
major  risk  exposure  to  adverse  conditions.   The  higher  the  degree  of
speculation, the lower the rating.
         C/C: This rating is only for no-interest income bonds.
         D: Debt in  default;  payment  of  interest  and/or  principal  is in
arrears.



                               LETTER OF INTENT

                           
Date

Calvert Distributors, Inc.
4550 Montgomery Avenue
Bethesda, MD 20814

Ladies and Gentlemen:

         By signing this Letter of Intent, or affirmatively marking the
Letter of Intent option on my Fund Account Application Form, I agree to be
bound by the terms and conditions applicable to Letters of Intent appearing
in the Prospectus and the Statement of Additional Information for the Fund
and the provisions described below as they may be amended from time to time
by the Fund. Such amendments will apply automatically to existing Letters of
Intent.

         I intend to invest in the shares of:________________ (Fund or
Portfolio name) during the thirteen (13) month period from the date of my
first purchase pursuant to this Letter (which cannot be more than ninety
(90) days prior to the date of this Letter or my Fund Account Application
Form, whichever is applicable), an aggregate amount (excluding any
reinvestments of distributions) of at least fifty thousand dollars ($50,000)
which, together with my current holdings of the Fund (at public offering
price on date of this Letter or my Fund Account Application Form, whichever
is applicable), will equal or exceed the amount checked below:

         __ $50,000 __ $100,000 __ $250,000 __ $500,000 __ $1,000,000

         Subject to the conditions specified below, including the terms of
escrow, to which I hereby agree, each purchase occurring after the date of
this Letter will be made at the public offering price applicable to a single
transaction of the dollar amount specified above, as described in the Fund's
prospectus. "Fund" in this Letter of Intent shall refer to the Fund or
Portfolio, as the case may be. No portion of the sales charge imposed on
purchases made prior to the date of this Letter will be refunded.

         I am making no commitment to purchase shares, but if my purchases
within thirteen months from the date of my first purchase do not aggregate
the minimum amount specified above, I will pay the increased amount of sales
charges prescribed in the terms of escrow described below. I understand that
4.75% of the minimum dollar amount specified above will be held in escrow in
the form of shares (computed to the nearest full share). These shares will
be held subject to the terms of escrow described below.

         From the initial purchase (or subsequent purchases if necessary),
4.75% of the dollar amount specified in this Letter shall be held in escrow
in shares of the Fund by the Fund's transfer agent. For example, if the
minimum amount specified under the Letter is $50,000, the escrow shall be
shares valued in the amount of $2,375 (computed at the public offering price
adjusted for a $50,000 purchase). All dividends and any capital gains
distribution on the escrowed shares will be credited to my account.

         If the total minimum investment specified under the Letter is
completed within a thirteen month period, escrowed shares will be promptly
released to me. However, shares disposed of prior to completion of the
purchase requirement under the Letter will be deducted from the amount
required to complete the investment commitment.

         Upon expiration of this Letter, the total purchases pursuant to the
Letter are less than the amount specified in the Letter as the intended
aggregate purchases, Calvert Distributors, Inc. ("CDI") will bill me for an
amount equal to the difference between the lower load I paid and the dollar
amount of sales charges which I would have paid if the total amount
purchased had been made at a single time. If not paid by the investor within
20 days, CDI will debit the difference from my account. Full shares, if any,
remaining in escrow after the aforementioned adjustment will be released
and, upon request, remitted to me.

         I irrevocably constitute and appoint CDI as my attorney-in-fact,
with full power of substitution, to surrender for redemption any or all
escrowed shares on the books of the Fund. This power of attorney is coupled
with an interest.

         The commission allowed by CDI to the broker-dealer named herein
shall be at the rate applicable to the minimum amount of my specified
intended purchases.

         The Letter may be revised upward by me at any time during the
thirteen-month period, and such a revision will be treated as a new Letter,
except that the thirteen-month period during which the purchase must be made
will remain unchanged and there will be no retroactive reduction of the
sales charges paid on prior purchases.

         In determining the total amount of purchases made hereunder, shares
disposed of prior to termination of this Letter will be deducted. My
broker-dealer shall refer to this Letter of Intent in placing any future
purchase orders for me while this Letter is in effect.


                                                     
Dealer

                                                     
Name of Investor(s)

By                                                   
     Authorized Signer

                                                     
Address

                                                     
Signature of Investor(s)

                                                     
Date

                                                     
Signature of Investor(s)

                                                     
Date

<PAGE>

PART C. OTHER INFORMATION

Item 23. Exhibits

1.       Underwriting Agreement, filed herewith.

3.(i)    Declaration of Trust (incorporated by reference to Registrant's
Initial Registration Statement, October 20, 1980).

3.(ii)   By-Laws (incorporated by reference to Registrant's Initial
Registration Statement, October 20, 1980).

23.      Opinion and Consent of Counsel as to Legality of Shares Being
Registered, filed herewith.

23A.     Consent of Independent Accountants to use of report, filed herewith.

99.B5.   Investment Advisory Contract, filed herewith.

99.B7.   Trustees' Deferred Compensation Agreement (incorporated by reference
to Registrant's Post-Effective Amendment No. 30, January 31, 1992).

99.B8.   Custodial Contract (with respect to all Portfolios except Vermont
Municipal Portfolio, (incorporated by reference to Registrant's Post-Effective
Amendment No. 34, November 30, 1993); with respect to Vermont Municipal
Portfolio, (incorporated by reference to Registrant's Post-Effective Amendment
No. 31, April 30, 1992).

99B9.a.  Transfer Agency Contract and Shareholder Servicing Contract,
incorporated by reference to Registrant's Post-Effective Amendment No. 45,
April 30, 1998, accession number 0000319676-98-000007.

99B9.b.  Administrative Services Agreement (incorporated by reference to
Registrant's Post-Effective Amendment No. 15, January 30, 1989).

99B9.c.  Multiple-class plan pursuant to Investment Company Act of 1940 Rule
18f-3, filed herewith.

99B.15.  Plan of Distribution for the Class A Shares of the Long-Term
Portfolio, incorporated by reference to Registrant's Post-Effective Amendment
No. 5, September 13, 1983.
With respect to Class A Shares of the Vermont Municipal Portfolio, the Plan of
Distribution was terminated, and the termination was ratified by the Fund
Trustees on November 6, 1991.
For the Class B and C shares of the Limited-Term, Long-Term, and Vermont
Portfolios, incorporated by reference to Registrant's Post-Effective Amendment
No. 45, April 30, 1998, accession number 0000319676-98-000007.
For Class T, filed herewith.


Item 24. Persons Controlled By or Under Common Control With Registrant

Not applicable.


Item 25. Indemnification

         Registrant's Declaration of Trust, which Declaration is Exhibit 1 of
this Registration Statement, provides, in summary, that officers, trustees,
employees, and agents shall be indemnified by Registrant against liabilities
and expenses incurred by such persons in connection with actions, suits, or
proceedings arising out of their offices or duties of employment, except that
no indemnification can be made to such a person if he has been adjudged liable
of willful misfeasance, bad faith, gross negligence, or reckless disregard of
his duties. In the absence of such an adjudication, the determination of
eligibility for indemnification shall be made by independent counsel in a
written opinion or by the vote of a majority of a quorum of trustees who are
neither "interested persons" of Registrant, as that term is defined in Section
2(a)(19) of the Investment Company Act of 1940, nor parties to the proceeding.

         Registrant's Declaration of Trust also provides that Registrant may
purchase and maintain liability insurance on behalf of any officer, trustee,
employee or agent against any liabilities arising from such status. In this
regard, Registrant maintains a Directors & Officers (Partners) Liability
Insurance Policy with Chubb Group of Insurance Companies, 15 Mountain View
Road, Warren, New Jersey 07061, providing Registrant with $5 million in
directors and officers liability coverage, plus $5 million in excess directors
and officers liability coverage for the independent trustees/directors only.
Registrant also maintains an $8 million Investment Company Blanket Bond issued
by ICI Mutual Insurance Company, P.O. Box 730, Burlington, Vermont, 05402.


Item 26. Business and Other Connections of Investment Adviser

                           Name of Company, Principal
Name                       Business and Address                   Capacity


Barbara J. Krumsiek        Calvert Variable Series, Inc.          Officer
                           Calvert Municipal Fund, Inc.            and
                           Calvert World Values Fund, Inc.        Director

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           First Variable Rate Fund for           Officer
                            Government Income                      and
                           Calvert Tax-Free Reserves              Trustee
                           Calvert Social Investment Fund
                           Calvert Cash Reserves
                           The Calvert Fund

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor                      and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Group, Ltd.                    Officer
                           Holding Company                         and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Shareholder Services, Inc.     Officer
                           Transfer Agent                          and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Officer
                           Service Company                        and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Distributors, Inc.             Officer
                           Broker-Dealer                           and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert-Sloan Advisers, LLC            Director
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert New World Fund, Inc.           Director
                           Investment Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           --------------
                           Alliance Capital Mgmt. L.P.      Sr. Vice President
                           Mutual Fund Division                   Director
                           1345 Avenue of the Americas
                           New York, NY 10105
                           --------------

Ronald M. Wolfsheimer      First Variable Rate Fund               Officer
                            for Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Calvert Variable Series, Inc.
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.
                           Calvert New World Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           --------------
                           Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Group, Ltd.                    Officer
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Shareholder Services, Inc.     Officer
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Officer
                           Service Company                         and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Distributors, Inc.             Director
                           Broker-Dealer                           and
                           4550 Montgomery Avenue                 Officer
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert-Sloan Advisers, LLC            Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------

David R. Rochat            First Variable Rate Fund               Officer
                            for Government Income                  and
                           Calvert Tax-Free Reserves              Trustee
                           Calvert Cash Reserves
                           The Calvert Fund

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Municipal Fund, Inc.           Officer
                           Investment Company                      and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor                      and
                           4550 Montgomery Avenue                 Director
                           Bethesda, Maryland 20814
                           ---------------
                           Chelsea Securities, Inc.               Officer
                           Securities Firm                         and
                           Post Office Box 93                     Director
                           Chelsea, Vermont 05038
                           ---------------
                           Grady, Berwald & Co.                   Officer
                           Holding Company                         and
                           43A South Finley Avenue                Director
                           Basking Ridge, NJ 07920
                           ---------------

Reno J. Martini            Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Group, Ltd.                    Director
                           Holding Company                         and
                           4550 Montgomery Avenue                 Officer
                           Bethesda, Maryland 20814
                           ---------------
                           First Variable Rate Fund               Officer
                            for Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Calvert Variable Series, Inc.
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert New World Fund, Inc.           Director
                           Investment Company                      and
                           4550 Montgomery Avenue                 Officer
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert-Sloan Advisers, LLC            Director
                           Investment Advisor                      and
                           4550 Montgomery Avenue                 Officer
                           Bethesda, Maryland 20814
                           ---------------

Charles T. Nason           Ameritas Acacia Mutual Holding Co.     Officer
                           Acacia National Life Insurance         and Director

                           Insurance Companies
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Acacia Financial Corporation           Officer
                           Holding Company                         and
                           7315 Wisconsin Avenue                  Director
                           Bethesda, Maryland 20814
                           ---------------
                           Acacia Federal Savings Bank            Director
                           Savings Bank
                           7600-B Leesburg Pike
                           Falls Church, Virginia 22043
                           ---------------
                           Enterprise Resources, Inc.             Director
                           Business Support Services
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Acacia Realty Square, L.L.C.           Director
                           Realty Investments
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Gardner Montgomery Company             Director
                           Tax Return Preparation Services
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Group, Ltd.                    Director
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Director
                           Service Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management Co., Inc.     Director
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Shareholder Services, Inc.     Director
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Social Investment Fund         Trustee
                           Investment Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           -----------------
                           The Advisors Group, Inc.               Director
                           Broker-Dealer and
                           Investment Advisor
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------

Robert-John H.             Acacia National Life Insurance         Officer
 Sands                     Insurance Company                       and
                           7315 Wisconsin Avenue                  Director
                           Bethesda, Maryland 20814
                           ----------------
                           Ameritas Acacia Mutual Holding Co.     Officer
                           Insurance Company
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Acacia Financial Corporation           Officer
                           Holding Company                         and
                           7315 Wisconsin Avenue                  Director
                           Bethesda, Maryland 20814
                           ----------------
                           Acacia Federal Savings Bank            Officer
                           Savings Bank
                           7600-B Leesburg Pike
                           Falls Church, Virginia 22043
                           ---------------
                           Enterprise Resources, Inc.             Director
                           Business Support Services
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Acacia Realty Square, L.L.C.           Director
                           Realty Investments
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Gardner Montgomery Company             Director
                           Tax Return Preparation Services
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           The Advisors Group, Inc.               Director
                           Broker-Dealer and
                           Investment Advisor
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Group, Ltd.                    Director
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Director
                           Service Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management, Co., Inc.    Director
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Shareholder Services, Inc.     Director
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------

William M. Tartikoff       Acacia National Life Insurance         Officer
                           Insurance Company
                           7315 Wisconsin Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           First Variable Rate Fund for           Officer
                            Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Calvert Variable Series, Inc.
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.
                           Calvert New World Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Group, Ltd.                    Officer
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative                 Officer
                           Services Company
                           Service Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management Co. Inc.      Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Shareholder Services, Inc.     Officer
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Distributors, Inc.             Director
                           Broker-Dealer                           and
                           4550 Montgomery Avenue                 Officer
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert-Sloan Advisers, LLC            Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------

Susan Walker Bender        Calvert Group, Ltd.                    Officer
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Officer
                           Service Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Shareholder Services, Inc.     Officer
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Distributors, Inc.             Officer
                           Broker-Dealer
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert-Sloan Advisers, LLC            Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           First Variable Rate Fund for           Officer
                            Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Calvert Variable Series, Inc.
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.
                           Calvert New World Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------

Katherine Stoner           Calvert Group, Ltd.                    Officer
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Officer
                           Service Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Shareholder Services, Inc.     Officer
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Distributors, Inc.             Officer
                           Broker-Dealer
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert-Sloan Advisers, LLC            Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           First Variable Rate Fund for           Officer
                            Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Calvert Variable Series, Inc.
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.
                           Calvert New World Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------

Ivy Wafford Duke           Calvert Group, Ltd.                    Officer
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Officer
                           Service Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Shareholder Services, Inc.     Officer
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Distributors, Inc.             Officer
                           Broker-Dealer
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert-Sloan Advisers, LLC            Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           First Variable Rate Fund for           Officer
                            Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Calvert Variable Series, Inc.
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.
                           Calvert New World Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------

Victor Frye                Calvert Group, Ltd.                    Officer
                           Holding Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Administrative Services Co.    Officer
                           Service Company
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ---------------
                           Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Shareholder Services, Inc.     Officer
                           Transfer Agent
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           Calvert Distributors, Inc.             Officer
                           Broker-Dealer
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           First Variable Rate Fund for           Officer
                            Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Calvert Variable Series, Inc.
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.
                           Calvert New World Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ----------------
                           The Advisors Group, Inc.               Counsel
                           Broker-Dealer and                      and
                           Investment Advisor                     Compliance
                           7315 Wisconsin Avenue                  Manager
                           Bethesda, Maryland 20814
                           ---------------

Daniel K. Hayes            Calvert Asset Management Co., Inc.     Officer
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ------------------
                           First Variable Rate Fund for           Officer
                            Government Income
                           Calvert Tax-Free Reserves
                           Calvert Cash Reserves
                           Calvert Social Investment Fund
                           The Calvert Fund
                           Calvert Variable Series, Inc.
                           Calvert Municipal Fund, Inc.
                           Calvert World Values Fund, Inc.

                           Investment Companies
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ------------------

Steve Van Order            Calvert Asset Management               Officer
                           Company, Inc.
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ------------------

John Nichols               Calvert Asset Management               Officer
                           Company, Inc.
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ------------------

David Leach                Calvert Asset Management               Officer
                           Company, Inc.
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ------------------

Matthew D. Gelfand         Calvert Asset Management               Officer
                           Company, Inc.
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ------------------
                           Strategic Investment Management        Officer
                           Investment Advisor
                           1001 19th Street North
                           Arlington, Virginia 20009
                           ------------------
Andrea Hagans              Calvert Asset Management               Officer
                           Company, Inc.
                           Investment Advisor
                           4550 Montgomery Avenue
                           Bethesda, Maryland 20814
                           ------------------

Item 27. Principal Underwriters

         (a)      Registrant's principal underwriter underwrites shares of
First Variable Rate Fund for Government Income, Calvert Tax-Free Reserves,
Calvert Social Investment Fund, Calvert Cash Reserves, The Calvert Fund,
Calvert Municipal Fund, Inc., Calvert World Values Fund, Inc., Calvert New
World Fund, Inc., and Calvert Variable Series, Inc.

         (b)      Positions of Underwriter's Officers and Directors

Name and Principal         Position(s) with               Position(s) with
Business Address           Underwriter                    Registrant

Barbara J. Krumsiek        Director and President         President and Trustee

Ronald M. Wolfsheimer      Director, Senior Vice          Treasurer
                           President and Chief Financial Officer

William M. Tartikoff       Director, Senior Vice          Vice President and
                           President and Secretary        Secretary

Craig Cloyed               Senior Vice President          None

Karen Becker               Vice President, Operations     None

Steve Cohen                Vice President                 None

Geoffrey Ashton            Regional Vice President        None

Martin Brown               Regional Vice President        None

Bill Hairgrove             Regional Vice President        None

Janet Haley                Regional Vice President        None

Steve Himber               Regional Vice President        None

Ben Ogbogu                 Regional Vice President        None

Tom Stanton                Regional Vice President        None

Christine Teske            Regional Vice President        None

Susan Walker Bender        Assistant Secretary            Assistant Secretary

Katherine Stoner           Assistant Secretary            Assistant Secretary

Ivy Wafford Duke           Assistant Secretary            Assistant Secretary

Victor Frye                Assistant Secretary            Assistant Secretary &
                           and Compliance Officer         Compliance Officer

         (c)      Inapplicable.


Item 28. Location of Accounts and Records

         Ronald M. Wolfsheimer, Treasurer
         and
         William M. Tartikoff, Secretary

         4550 Montgomery Avenue, Suite 1000N
         Bethesda, Maryland 20814

Item 29.  Management Services

         Not Applicable

Item 32.  Undertakings

         Not Applicable

         SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment
Company Act of 1940, the Registrant certifies that it meets all of the
requirements for effectiveness of this registration statement under Rule
485(b) under the Securities Act and has duly caused this registration
statement to be signed on its behalf by the undersigned, duly authorized, in
the City of Bethesda, and State of Maryland, on the 27th day of April, 1999.

         CALVERT TAX-FREE RESERVES

         By:
         _________________**_________________
         Barbara J. Krumsiek
         President and Trustee

         SIGNATURES

Pursuant to the requirements of the Securities Act of 1933,
this Registration Statement has been signed below by the following
persons in the capacities and on the date indicated.

Signature                           Title                     Date


__________**____________            President and             4/27/99
Barbara J. Krumsiek                 Trustee (Principal Executive Officer)


__________**____________            Principal Accounting      4/27/99
Ronald M. Wolfsheimer               Officer


__________**____________            Trustee                   4/27/99
Richard L. Baird, Jr.


__________**____________            Trustee                   4/27/99
Frank H. Blatz, Jr., Esq.


__________**____________            Trustee                   4/27/99
Frederick T. Borts, M.D.


__________**____________            Trustee                   4/27/99
Charles E. Diehl


__________**____________            Trustee                   4/27/99
Douglas E. Feldman


__________**____________            Trustee                   4/27/99
Peter W. Gavian


__________**____________            Trustee                   4/27/99
John G. Guffey, Jr.


__________**____________            Trustee                   4/27/99
M. Charito Kruvant


__________**____________            Trustee                   4/27/99
Arthur J. Pugh


__________**____________            Trustee                   4/27/99
David R. Rochat


__________**____________            Trustee                   4/27/99
D. Wayne Silby


**By Susan Walker Bender as Attorney-in-fact, pursuant to Power of Attorney
Forms on file.


EXHIBIT INDEX

Form N-1A
Item No.

Ex-1 Underwriting Agreement

Ex-23 Form of Opinion and Consent of Counsel

Ex-23A Auditors' Consent to file

Ex-24 Power of Attorney

Ex-27 Financial Data Schedules (6)

Ex-99.B5.  Investment Advisory Agreement

Ex-99.B9.c.  Multiple Class Rule 18f-3 Plan

Ex-99.B15  Distribution Plan for Class T


















                              POWER OF ATTORNEY


         I, the  undersigned  Trustee/Director  of Calvert  Social  Investment
Fund,  Calvert  World  Values  Fund,  Inc.,  Calvert  Variable  Series,  Inc.,
Calvert  New  World  Fund,  Inc.,  First  Variable  Rate  Fund for  Government
Income,  Calvert Tax-Free  Reserves,  Calvert Cash Reserves,  The Calvert Fund
and Calvert  Municipal  Fund, Inc. (each,  respectively,  the "Fund"),  hereby
constitute Ronald M. Wolfsheimer,  William M. Tartikoff,  Susan Walker Bender,
Katherine  Stoner,  Lisa  Crossley  Newton,  and Ivy Wafford  Duke my true and
lawful  attorneys,  with full power to each of them,  to sign for me and in my
name  in  the  appropriate   capacities,   all  registration   statements  and
amendments  filed by the Fund with any federal or state agency,  and to do all
such things in my name and behalf  necessary for  registering  and maintaining
registration or exemptions  from  registration of the Fund with any government
agency in any jurisdiction, domestic or foreign.

         The same  persons are  authorized  generally to do all such things in
my name and behalf to comply with the  provisions  of all  federal,  state and
foreign  laws,  regulations,  and policy  pronouncements  affecting  the Fund,
including,  but not limited to, the  Securities  Act of 1933,  the  Securities
Exchange  Act of 1934,  the  Investment  Company Act of 1940,  the  Investment
Advisers Act of 1940,  the Internal  Revenue Code of 1986,  and all state laws
regulating the securities industry.

         The  same  persons  are  further  authorized  to  sign my name to any
document needed to maintain the lawful operation of the Fund.

         When  any of the  above-referenced  attorneys  signs  my  name to any
document in  connection  with  maintaining  the lawful  operation of the Fund,
the signing is  automatically  ratified and  confirmed by me by virtue of this
Power of Attorney.

         WITNESS my hand on the date set forth below.


June 2, 1998
Date                                        /Signature/

Katherine Stoner                            Barbara J. Krumsiek
Witness                                     Name of Director


<PAGE>


                              POWER OF ATTORNEY

         I, the  undersigned  Trustee/Director  of Calvert  Social  Investment
Fund,  First  Variable  Rate  Fund for  Government  Income,  Calvert  Tax-Free
Reserves,  Calvert  Cash  Reserves,  The Calvert  Fund and  Calvert  Municipal
Fund, Inc.  (each,  respectively,  the "Fund"),  hereby  constitute  Ronald M.
Wolfsheimer,  William M.  Tartikoff,  Susan Walker Bender,  Katherine  Stoner,
Lisa  Crossley  Newton,  and Ivy  Wafford  Duke my true and lawful  attorneys,
with  full  power  to  each  of  them,  to  sign  for me and in my name in the
appropriate  capacities,  all registration  statements and amendments filed by
the Fund with any  federal or state  agency,  and to do all such  things in my
name and behalf  necessary for  registering  and  maintaining  registration or
exemptions  from  registration  of the Fund with any government  agency in any
jurisdiction, domestic or foreign.

         The same  persons are  authorized  generally to do all such things in
my name and behalf to comply with the  provisions  of all  federal,  state and
foreign  laws,  regulations,  and policy  pronouncements  affecting  the Fund,
including,  but not limited to, the  Securities  Act of 1933,  the  Securities
Exchange  Act of 1934,  the  Investment  Company Act of 1940,  the  Investment
Advisers Act of 1940,  the Internal  Revenue Code of 1986,  and all state laws
regulating the securities industry.

         The  same  persons  are  further  authorized  to  sign my name to any
document needed to maintain the lawful operation of the Fund.

         When  any of the  above-referenced  attorneys  signs  my  name to any
document in  connection  with  maintaining  the lawful  operation of the Fund,
the signing is  automatically  ratified and  confirmed by me by virtue of this
Power of Attorney.

         WITNESS my hand on the date set forth below.


June 2, 1998
Date                                        /Signature/

Susan Walker Bender                         Richard L. Baird, Jr.
Witness                                     Name of Trustee/Director


<PAGE>

                              POWER OF ATTORNEY


         I, the  undersigned  Trustee/Director  of  Calvert  Variable  Series,
Inc.,  First  Variable  Rate  Fund for  Government  Income,  Calvert  Tax-Free
Reserves,  Calvert  Cash  Reserves,  The Calvert  Fund and  Calvert  Municipal
Fund, Inc.  (each,  respectively,  the "Fund"),  hereby  constitute  Ronald M.
Wolfsheimer,  William M.  Tartikoff,  Susan Walker Bender,  Katherine  Stoner,
Lisa  Crossley  Newton,  and Ivy  Wafford  Duke my true and lawful  attorneys,
with  full  power  to  each  of  them,  to  sign  for me and in my name in the
appropriate  capacities,  all registration  statements and amendments filed by
the Fund with any  federal or state  agency,  and to do all such  things in my
name and behalf  necessary for  registering  and  maintaining  registration or
exemptions  from  registration  of the Fund with any government  agency in any
jurisdiction, domestic or foreign.

         The same  persons are  authorized  generally to do all such things in
my name and behalf to comply with the  provisions  of all  federal,  state and
foreign  laws,  regulations,  and policy  pronouncements  affecting  the Fund,
including,  but not limited to, the  Securities  Act of 1933,  the  Securities
Exchange  Act of 1934,  the  Investment  Company Act of 1940,  the  Investment
Advisers Act of 1940,  the Internal  Revenue Code of 1986,  and all state laws
regulating the securities industry.

         The  same  persons  are  further  authorized  to  sign my name to any
document needed to maintain the lawful operation of the Fund.

         When  any of the  above-referenced  attorneys  signs  my  name to any
document in  connection  with  maintaining  the lawful  operation of the Fund,
the signing is  automatically  ratified and  confirmed by me by virtue of this
Power of Attorney.

         WITNESS my hand on the date set forth below.


June 3, 1998
Date                                        /Signature/

Frank H. Blatz, Jr.                         Charles E. Diehl
Witness                                     Name of Director


<PAGE>


                              POWER OF ATTORNEY


         I, the undersigned Trustee/Director of First Variable Rate Fund for
Government Income, Calvert Tax-Free Reserves, Calvert Cash Reserves, The
Calvert Fund, and Calvert Municipal Fund, Inc. (collectively, the "Funds"),
hereby constitute Ronald M. Wolfsheimer, William M. Tartikoff, Susan Walker
Bender, Katherine Stoner, Lisa Crossley, and Ivy Wafford Duke my true and
lawful attorneys, with full power to each of them, to sign for me and in my
name in the appropriate capacities, all registration statements and
amendments filed by the Funds with any federal or state agency, and to do
all such things in my name and behalf necessary for registering and
maintaining registration or exemptions from registration of the Funds with
any government agency in any jurisdiction, domestic or foreign.

         The same persons are authorized generally to do all such things in
my name and behalf to comply with the provisions of all federal, state and
foreign laws, regulations, and policy pronouncements affecting the Funds,
including, but not limited to, the Securities Act of 1933, the Securities
Exchange Act of 1934, the Investment Company Act of 1940, the Investment
Advisers Act of 1940, and all state laws regulating the securities industry.

         The same persons are further authorized to sign my name to any
document needed to maintain the lawful operation of the Funds in connection
with any transaction approved by the Board of Trustee/Directors.

         When any of the above-referenced attorneys signs my name to any
document in connection with maintaining the lawful operation of the Funds,
the signing is automatically ratified and confirmed by me by virtue of this
Power of Attorney.

         WITNESS my hand on the date set forth below.

May 7, 1997
Date                                        /Signature/

Edwidge Saint-Felix                         Douglas E. Feldman
Witness                                     Name of Trustee/Director


<PAGE>


                              POWER OF ATTORNEY


         I, the undersigned Trustee/Director of First Variable Rate Fund for
Government Income, Calvert Tax-Free Reserves, Calvert Cash Reserves, The
Calvert Fund, and Calvert Municipal Fund, Inc. (collectively, the "Funds"),
hereby constitute Ronald M. Wolfsheimer, William M. Tartikoff, Susan Walker
Bender, Katherine Stoner, Lisa Crossley, and Ivy Wafford Duke my true and
lawful attorneys, with full power to each of them, to sign for me and in my
name in the appropriate capacities, all registration statements and
amendments filed by the Funds with any federal or state agency, and to do
all such things in my name and behalf necessary for registering and
maintaining registration or exemptions from registration of the Funds with
any government agency in any jurisdiction, domestic or foreign.

         The same persons are authorized generally to do all such things in
my name and behalf to comply with the provisions of all federal, state and
foreign laws, regulations, and policy pronouncements affecting the Funds,
including, but not limited to, the Securities Act of 1933, the Securities
Exchange Act of 1934, the Investment Company Act of 1940, the Investment
Advisers Act of 1940, and all state laws regulating the securities industry.

         The same persons are further authorized to sign my name to any
document needed to maintain the lawful operation of the Funds in connection
with any transaction approved by the Board of Trustee/Directors.

         When any of the above-referenced attorneys signs my name to any
document in connection with maintaining the lawful operation of the Funds,
the signing is automatically ratified and confirmed by me by virtue of this
Power of Attorney.

         WITNESS my hand on the date set forth below.

May 7, 1997
Date                                        /Signature/

Edwidge Saint-Felix                         Peter W. Gavian
Witness                                     Name of Trustee/Director


<PAGE>


                              POWER OF ATTORNEY


         I, the  undersigned  Trustee/Director  of Calvert  Social  Investment
Fund,   Calvert  World  Values  Fund,  Inc.,  First  Variable  Rate  Fund  for
Government  Income,  Calvert  Tax-Free  Reserves,  Calvert Cash Reserves,  The
Calvert  Fund and  Calvert  Municipal  Fund,  Inc.  (each,  respectively,  the
"Fund"),  hereby  constitute  Ronald M.  Wolfsheimer,  William  M.  Tartikoff,
Susan Walker Bender,  Katherine Stoner,  Lisa Crossley Newton, and Ivy Wafford
Duke my true and lawful  attorneys,  with full power to each of them,  to sign
for  me  and  in my  name  in the  appropriate  capacities,  all  registration
statements  and  amendments  filed  by the  Fund  with  any  federal  or state
agency,  and to do all  such  things  in my  name  and  behalf  necessary  for
registering  and maintaining  registration or exemptions from  registration of
the  Fund  with  any  government  agency  in  any  jurisdiction,  domestic  or
foreign.

         The same  persons are  authorized  generally to do all such things in
my name and behalf to comply with the  provisions  of all  federal,  state and
foreign  laws,  regulations,  and policy  pronouncements  affecting  the Fund,
including,  but not limited to, the  Securities  Act of 1933,  the  Securities
Exchange  Act of 1934,  the  Investment  Company Act of 1940,  the  Investment
Advisers Act of 1940,  the Internal  Revenue Code of 1986,  and all state laws
regulating the securities industry.

         The  same  persons  are  further  authorized  to  sign my name to any
document needed to maintain the lawful operation of the Fund.

         When  any of the  above-referenced  attorneys  signs  my  name to any
document in  connection  with  maintaining  the lawful  operation of the Fund,
the signing is  automatically  ratified and  confirmed by me by virtue of this
Power of Attorney.

         WITNESS my hand on the date set forth below.


June 2, 1998
Date                                        /Signature/

M. Charito Kruvant                          John G. Guffey, Jr.
Witness                                     Name of Trustee/Director


<PAGE>


                              POWER OF ATTORNEY


         I, the undersigned Trustee/Director of First Variable Rate Fund for
Government Income, Calvert Tax-Free Reserves, Calvert Cash Reserves, The
Calvert Fund, and Calvert Municipal Fund, Inc. (collectively, the "Funds"),
hereby constitute Ronald M. Wolfsheimer, William M. Tartikoff, Susan Walker
Bender, Katherine Stoner, Lisa Crossley, and Ivy Wafford Duke my true and
lawful attorneys, with full power to each of them, to sign for me and in my
name in the appropriate capacities, all registration statements and
amendments filed by the Funds with any federal or state agency, and to do
all such things in my name and behalf necessary for registering and
maintaining registration or exemptions from registration of the Funds with
any government agency in any jurisdiction, domestic or foreign.

         The same persons are authorized generally to do all such things in
my name and behalf to comply with the provisions of all federal, state and
foreign laws, regulations, and policy pronouncements affecting the Funds,
including, but not limited to, the Securities Act of 1933, the Securities
Exchange Act of 1934, the Investment Company Act of 1940, the Investment
Advisers Act of 1940, and all state laws regulating the securities industry.

         The same persons are further authorized to sign my name to any
document needed to maintain the lawful operation of the Funds in connection
with any transaction approved by the Board of Trustee/Directors.

         When any of the above-referenced attorneys signs my name to any
document in connection with maintaining the lawful operation of the Funds,
the signing is automatically ratified and confirmed by me by virtue of this
Power of Attorney.

         WITNESS my hand on the date set forth below.

May 7, 1997
Date                                        /Signature/

Edwidge Saint-Felix                         M. Charito Kruvant
Witness                                     Name of Trustee/Director


<PAGE>


                              POWER OF ATTORNEY


         I, the  undersigned  Trustee/Director  of  Calvert  Variable  Series,
Inc.,  First  Variable  Rate  Fund for  Government  Income,  Calvert  Tax-Free
Reserves,  Calvert  Cash  Reserves,  The Calvert  Fund and  Calvert  Municipal
Fund, Inc.  (each,  respectively,  the "Fund"),  hereby  constitute  Ronald M.
Wolfsheimer,  William M.  Tartikoff,  Susan Walker Bender,  Katherine  Stoner,
Lisa  Crossley  Newton,  and Ivy  Wafford  Duke my true and lawful  attorneys,
with  full  power  to  each  of  them,  to  sign  for me and in my name in the
appropriate  capacities,  all registration  statements and amendments filed by
the Fund with any  federal or state  agency,  and to do all such  things in my
name and behalf  necessary for  registering  and  maintaining  registration or
exemptions  from  registration  of the Fund with any government  agency in any
jurisdiction, domestic or foreign.

         The same  persons are  authorized  generally to do all such things in
my name and behalf to comply with the  provisions  of all  federal,  state and
foreign  laws,  regulations,  and policy  pronouncements  affecting  the Fund,
including,  but not limited to, the  Securities  Act of 1933,  the  Securities
Exchange  Act of 1934,  the  Investment  Company Act of 1940,  the  Investment
Advisers Act of 1940,  the Internal  Revenue Code of 1986,  and all state laws
regulating the securities industry.

         The  same  persons  are  further  authorized  to  sign my name to any
document needed to maintain the lawful operation of the Fund.

         When  any of the  above-referenced  attorneys  signs  my  name to any
document in  connection  with  maintaining  the lawful  operation of the Fund,
the signing is  automatically  ratified and  confirmed by me by virtue of this
Power of Attorney.

         WITNESS my hand on the date set forth below.


June 3, 1998
Date                                        /Signature/

Frank H. Blatz, Jr.                         Arthur James Pugh
Witness                                     Name of Trustee/Director


<PAGE>


                              POWER OF ATTORNEY


         I, the undersigned Trustee/Director of First Variable Rate Fund for
Government Income, Calvert Tax-Free Reserves, Calvert Cash Reserves, The
Calvert Fund, and Calvert Municipal Fund, Inc. (collectively, the "Funds"),
hereby constitute Ronald M. Wolfsheimer, William M. Tartikoff, Susan Walker
Bender, Katherine Stoner, Lisa Crossley, and Ivy Wafford Duke my true and
lawful attorneys, with full power to each of them, to sign for me and in my
name in the appropriate capacities, all registration statements and
amendments filed by the Funds with any federal or state agency, and to do
all such things in my name and behalf necessary for registering and
maintaining registration or exemptions from registration of the Funds with
any government agency in any jurisdiction, domestic or foreign.

         The same persons are authorized generally to do all such things in
my name and behalf to comply with the provisions of all federal, state and
foreign laws, regulations, and policy pronouncements affecting the Funds,
including, but not limited to, the Securities Act of 1933, the Securities
Exchange Act of 1934, the Investment Company Act of 1940, the Investment
Advisers Act of 1940, and all state laws regulating the securities industry.

         The same persons are further authorized to sign my name to any
document needed to maintain the lawful operation of the Funds in connection
with any transaction approved by the Board of Trustee/Directors.

         When any of the above-referenced attorneys signs my name to any
document in connection with maintaining the lawful operation of the Funds,
the signing is automatically ratified and confirmed by me by virtue of this
Power of Attorney.

         WITNESS my hand on the date set forth below.


May 7, 1997
Date                                        /Signature/

Katherine Stoner                            David R. Rochat
Witness                                     Name of Trustee/Director


<PAGE>


                              POWER OF ATTORNEY


         I, the  undersigned  Trustee/Director  of Calvert  Social  Investment
Fund,   Calvert  World  Values  Fund,  Inc.,  First  Variable  Rate  Fund  for
Government  Income,  Calvert  Tax-Free  Reserves,  Calvert Cash Reserves,  The
Calvert  Fund and  Calvert  Municipal  Fund,  Inc.  (each,  respectively,  the
"Fund"),  hereby  constitute  Ronald M.  Wolfsheimer,  William  M.  Tartikoff,
Susan Walker Bender,  Katherine Stoner,  Lisa Crossley Newton, and Ivy Wafford
Duke my true and lawful  attorneys,  with full power to each of them,  to sign
for  me  and  in my  name  in the  appropriate  capacities,  all  registration
statements  and  amendments  filed  by the  Fund  with  any  federal  or state
agency,  and to do all  such  things  in my  name  and  behalf  necessary  for
registering  and maintaining  registration or exemptions from  registration of
the  Fund  with  any  government  agency  in  any  jurisdiction,  domestic  or
foreign.

         The same  persons are  authorized  generally to do all such things in
my name and behalf to comply with the  provisions  of all  federal,  state and
foreign  laws,  regulations,  and policy  pronouncements  affecting  the Fund,
including,  but not limited to, the  Securities  Act of 1933,  the  Securities
Exchange  Act of 1934,  the  Investment  Company Act of 1940,  the  Investment
Advisers Act of 1940,  the Internal  Revenue Code of 1986,  and all state laws
regulating the securities industry.

         The  same  persons  are  further  authorized  to  sign my name to any
document needed to maintain the lawful operation of the Fund.

         When  any of the  above-referenced  attorneys  signs  my  name to any
document in  connection  with  maintaining  the lawful  operation of the Fund,
the signing is  automatically  ratified and  confirmed by me by virtue of this
Power of Attorney.

         WITNESS my hand on the date set forth below.


June 2, 1998
Date                                        /Signature/

Barbara J. Krumsiek                         D. Wayne Silby
Witness                                     Name of Trustee/Director


<PAGE>



                              POWER OF ATTORNEY


         I, the undersigned  Trustee/Director  of First Variable Rate Fund for
Government  Income,  Calvert  Tax-Free  Reserves,  Calvert Cash Reserves,  The
Calvert  Fund and  Calvert  Municipal  Fund,  Inc.  (each,  respectively,  the
"Fund"),  hereby  constitute  Ronald M.  Wolfsheimer,  William  M.  Tartikoff,
Susan Walker Bender,  Katherine Stoner,  Lisa Crossley Newton, and Ivy Wafford
Duke my true and lawful  attorneys,  with full power to each of them,  to sign
for  me  and  in my  name  in the  appropriate  capacities,  all  registration
statements  and  amendments  filed  by the  Fund  with  any  federal  or state
agency,  and to do all  such  things  in my  name  and  behalf  necessary  for
registering  and maintaining  registration or exemptions from  registration of
the  Fund  with  any  government  agency  in  any  jurisdiction,  domestic  or
foreign.

         The same  persons are  authorized  generally to do all such things in
my name and behalf to comply with the  provisions  of all  federal,  state and
foreign  laws,  regulations,  and policy  pronouncements  affecting  the Fund,
including,  but not limited to, the  Securities  Act of 1933,  the  Securities
Exchange  Act of 1934,  the  Investment  Company Act of 1940,  the  Investment
Advisers Act of 1940,  the Internal  Revenue Code of 1986,  and all state laws
regulating the securities industry.

         The  same  persons  are  further  authorized  to  sign my name to any
document needed to maintain the lawful operation of the Fund.

         When  any of the  above-referenced  attorneys  signs  my  name to any
document in  connection  with  maintaining  the lawful  operation of the Fund,
the signing is  automatically  ratified and  confirmed by me by virtue of this
Power of Attorney.

         WITNESS my hand on the date set forth below.


September 16, 1998
Date                                        /Signature/

John E. Dudley                              Frederick Borts, M.D.
Witness                                     Name of Trustee/Director


<PAGE>


                              POWER OF ATTORNEY


         I, the  undersigned  Trustee/Director  of  Calvert  Variable  Series,
Inc.,  First  Variable  Rate  Fund for  Government  Income,  Calvert  Tax-Free
Reserves,  Calvert  Cash  Reserves,  The Calvert  Fund and  Calvert  Municipal
Fund, Inc.  (each,  respectively,  the "Fund"),  hereby  constitute  Ronald M.
Wolfsheimer,  William M.  Tartikoff,  Susan Walker Bender,  Katherine  Stoner,
Lisa  Crossley  Newton,  and Ivy  Wafford  Duke my true and lawful  attorneys,
with  full  power  to  each  of  them,  to  sign  for me and in my name in the
appropriate  capacities,  all registration  statements and amendments filed by
the Fund with any  federal or state  agency,  and to do all such  things in my
name and behalf  necessary for  registering  and  maintaining  registration or
exemptions  from  registration  of the Fund with any government  agency in any
jurisdiction, domestic or foreign.

         The same  persons are  authorized  generally to do all such things in
my name and behalf to comply with the  provisions  of all  federal,  state and
foreign  laws,  regulations,  and policy  pronouncements  affecting  the Fund,
including,  but not limited to, the  Securities  Act of 1933,  the  Securities
Exchange  Act of 1934,  the  Investment  Company Act of 1940,  the  Investment
Advisers Act of 1940,  the Internal  Revenue Code of 1986,  and all state laws
regulating the securities industry.

         The  same  persons  are  further  authorized  to  sign my name to any
document needed to maintain the lawful operation of the Fund.

         When  any of the  above-referenced  attorneys  signs  my  name to any
document in  connection  with  maintaining  the lawful  operation of the Fund,
the signing is  automatically  ratified and  confirmed by me by virtue of this
Power of Attorney.

         WITNESS my hand on the date set forth below.


June 3, 1998
Date                                        /Signature/

Elizabeth G. Murray                         Frank H. Blatz, Jr.
Witness                                     Name of Director


<PAGE>


                              POWER OF ATTORNEY


         I,  the  undersigned  officer  of  Calvert  Social  Investment  Fund,
Calvert World Values Fund, Inc.,  Calvert Variable Series,  Inc.,  Calvert New
World Fund,  Inc.,  First  Variable Rate Fund for Government  Income,  Calvert
Tax-Free  Reserves,  Calvert  Cash  Reserves,  The  Calvert  Fund and  Calvert
Municipal Fund,  Inc.  (each,  respectively,  the "Fund"),  hereby  constitute
Ronald M. Wolfsheimer,  William M. Tartikoff,  Susan Walker Bender,  Katherine
Stoner,  Lisa  Crossley  Newton,  and Ivy  Wafford  Duke my  true  and  lawful
attorneys,  with full power to each of them,  to sign for me and in my name in
the appropriate  capacities,  all registration statements and amendments filed
by the Fund with any  federal or state  agency,  and to do all such  things in
my name and behalf  necessary for registering and maintaining  registration or
exemptions  from  registration  of the Fund with any government  agency in any
jurisdiction, domestic or foreign.

         The same  persons are  authorized  generally to do all such things in
my name and behalf to comply with the  provisions  of all  federal,  state and
foreign  laws,  regulations,  and policy  pronouncements  affecting  the Fund,
including,  but not limited to, the  Securities  Act of 1933,  the  Securities
Exchange  Act of 1934,  the  Investment  Company Act of 1940,  the  Investment
Advisers Act of 1940,  the Internal  Revenue Code of 1986,  and all state laws
regulating the securities industry.

         The  same  persons  are  further  authorized  to  sign my name to any
document needed to maintain the lawful operation of the Fund.

         When  any of the  above-referenced  attorneys  signs  my  name to any
document in  connection  with  maintaining  the lawful  operation of the Fund,
the signing is  automatically  ratified and  confirmed by me by virtue of this
Power of Attorney.

         WITNESS my hand on the date set forth below.


June 2, 1998
Date                                        /Signature/

Edwidge Saint-Felix                         Ronald M. Wolfsheimer
Witness                                     Name of Officer





Exhibit 10




April 27, 1999


Securities and Exchange Commission
Judiciary Plaza
450 Fifth Street, N.W.
Washington, D.C. 20549


         Re:      Exhibit 10, Form N-1A
                  Calvert Tax-Free Reserves
                  File numbers 2-69565 and 811-3101


Ladies and Gentlemen:


         As counsel to Calvert Group, Ltd., it is my opinion that the
securities being registered by this Post-Effective Amendment No. 48 will
be legally issued, fully paid and non-assessable when sold. My opinion
is based on an examination of documents related to Calvert Tax-Free
Reserves (the "Trust"), including its Declaration of Trust, its By-Laws,
other original or photostatic copies of Trust records, certificates of
public officials, documents, papers, statutes, and authorities as I
deemed necessary to form the basis of this opinion.

         I therefore consent to filing this opinion of counsel with the
Securities and Exchange Commission as an Exhibit to the Trust's
Post-Effective Amendment No. 48 to its Registration Statement.

                                            Sincerely,

                                            /s/

                                            Susan Walker Bender
                                            Associate General Counsel





PricewaterhouseCoopers logo

PricewaterhouseCoopers LLP
250 West Pratt Street
Suite 2100
Baltimore MD 21201-2304
Telephone (410) 783 7600
Facsimile (410) 783 7680


CONSENT OF INDEPENDENT ACCOUNTANTS


We consent to the incorporation by reference in Post-Effective Amendment No.
48 to the Registration Statement of Calvert Tax-Free Reserves (comprised of
the Money Market, Limited-Term, Long-Term, Vermont, and California Money
Market Portfolios) on Form N-1A (File Number 2-69565 and 811-3101) of our
reports dated February 10, 1999, on our audit of the financial statements and
financial highlights of the Portfolios, which reports are included in the
Annual Report to Shareholders for the year ended December 31, 1998, which is
incorporated by reference in the Registration Statement. We also consent to
the reference to our firm under the caption "Financial Highlights" in the
Prospectus and "Independent Accountants" in the Statement of Additional
Information.

/s/
PricewaterhouseCoopers LLP


Baltimore, Maryland
April 27, 1999




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<ARTICLE> 6
<CIK> 0000319676
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<SERIES>
   <NUMBER> 321
   <NAME> MONEY MARKET FUND, CLASS O
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
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<PERIOD-START>                             JUL-01-1998
<PERIOD-END>                               DEC-31-1998
<INVESTMENTS-AT-COST>                          1575410
<INVESTMENTS-AT-VALUE>                         1575410
<RECEIVABLES>                                    19157
<ASSETS-OTHER>                                    9459
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<TOTAL-ASSETS>                                 1604026
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1737
<TOTAL-LIABILITIES>                               1737
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       1355091
<SHARES-COMMON-STOCK>                          1355203
<SHARES-COMMON-PRIOR>                          1379221
<ACCUMULATED-NII-CURRENT>                          230
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            179
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                   1355500
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                53436
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    8957
<NET-INVESTMENT-INCOME>                          44479
<REALIZED-GAINS-CURRENT>                           179
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                            44658
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (44485)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         882147
<NUMBER-OF-SHARES-REDEEMED>                   (926895)
<SHARES-REINVESTED>                              20730
<NET-CHANGE-IN-ASSETS>                         (23845)
<ACCUMULATED-NII-PRIOR>                             60
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             2771
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   9136
<AVERAGE-NET-ASSETS>                           1401614
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                  0.032
<PER-SHARE-GAIN-APPREC>                            0.0
<PER-SHARE-DIVIDEND>                           (0.035)
<PER-SHARE-DISTRIBUTIONS>                          0.0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   0.64
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000319676
<NAME> CALVERT TAX-FREE RESERVES
<SERIES>
   <NUMBER> 323
   <NAME> LIMITED TERM PORTFOLIO
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JUL-01-1998
<PERIOD-END>                               DEC-31-1998
<INVESTMENTS-AT-COST>                           532316
<INVESTMENTS-AT-VALUE>                          534848
<RECEIVABLES>                                    15670
<ASSETS-OTHER>                                    4887
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  555405
<PAYABLE-FOR-SECURITIES>                          2983
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         5210
<TOTAL-LIABILITIES>                               8193
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        544572
<SHARES-COMMON-STOCK>                            51093
<SHARES-COMMON-PRIOR>                            46008
<ACCUMULATED-NII-CURRENT>                           87
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                           (25)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                          2532
<NET-ASSETS>                                    547166
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                22427
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    3553
<NET-INVESTMENT-INCOME>                          18874
<REALIZED-GAINS-CURRENT>                           191
<APPREC-INCREASE-CURRENT>                          614
<NET-CHANGE-FROM-OPS>                            19679
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (18875)
<DISTRIBUTIONS-OF-GAINS>                          (73)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         181132
<NUMBER-OF-SHARES-REDEEMED>                   (134777)
<SHARES-REINVESTED>                               7836
<NET-CHANGE-IN-ASSETS>                           54922
<ACCUMULATED-NII-PRIOR>                            135
<ACCUMULATED-GAINS-PRIOR>                        (142)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             3049
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   3619
<AVERAGE-NET-ASSETS>                            510442
<PER-SHARE-NAV-BEGIN>                            10.70
<PER-SHARE-NII>                                  0.400
<PER-SHARE-GAIN-APPREC>                        (0.010)
<PER-SHARE-DIVIDEND>                           (0.396)
<PER-SHARE-DISTRIBUTIONS>                          0.0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.69
<EXPENSE-RATIO>                                   0.70
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000319676
<NAME> CALVERT TAX-FREE RESERVES
<SERIES>
   <NUMBER> 333
   <NAME> LONG TERM PORTFOLIO
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JUL-01-1998
<PERIOD-END>                               DEC-31-1998
<INVESTMENTS-AT-COST>                            57565
<INVESTMENTS-AT-VALUE>                           59787
<RECEIVABLES>                                     2540
<ASSETS-OTHER>                                     105
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   62432
<PAYABLE-FOR-SECURITIES>                          4692
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                           62
<TOTAL-LIABILITIES>                               4754
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         55207
<SHARES-COMMON-STOCK>                             3431
<SHARES-COMMON-PRIOR>                             3267
<ACCUMULATED-NII-CURRENT>                            5
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            231
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                          2222
<NET-ASSETS>                                     57665
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                 2999
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     466
<NET-INVESTMENT-INCOME>                           2533
<REALIZED-GAINS-CURRENT>                          1609
<APPREC-INCREASE-CURRENT>                       (1390)
<NET-CHANGE-FROM-OPS>                             2752
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       (2569)
<DISTRIBUTIONS-OF-GAINS>                        (1694)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                              0
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<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                          (1511)
<ACCUMULATED-NII-PRIOR>                             53
<ACCUMULATED-GAINS-PRIOR>                          317
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<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              332
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<GROSS-EXPENSE>                                    481
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<PER-SHARE-NAV-BEGIN>                            17.28
<PER-SHARE-NII>                                  0.780
<PER-SHARE-GAIN-APPREC>                          0.060
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<PER-SHARE-DISTRIBUTIONS>                      (0.513)
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<PER-SHARE-NAV-END>                              16.81
<EXPENSE-RATIO>                                   0.84
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

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<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000319676
<NAME> CALVERT TAX-FREE RESERVES
<SERIES>
   <NUMBER> 322
   <NAME> MONEY MARKET FUND, INSTITUTIONAL CLASS
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JUL-01-1998
<PERIOD-END>                               DEC-31-1998
<INVESTMENTS-AT-COST>                          1575410
<INVESTMENTS-AT-VALUE>                         1575410
<RECEIVABLES>                                    19157
<ASSETS-OTHER>                                    9459
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 1604026
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1737
<TOTAL-LIABILITIES>                               1737
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        246938
<SHARES-COMMON-STOCK>                           246941
<SHARES-COMMON-PRIOR>                           322812
<ACCUMULATED-NII-CURRENT>                           29
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                             25
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
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<DIVIDEND-INCOME>                                    0
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<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     493
<NET-INVESTMENT-INCOME>                           6073
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<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                             6098
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       (4075)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        1018459
<NUMBER-OF-SHARES-REDEEMED>                  (1096256)
<SHARES-REINVESTED>                               1926
<NET-CHANGE-IN-ASSETS>                         (73848)
<ACCUMULATED-NII-PRIOR>                              4
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              339
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    514
<AVERAGE-NET-ASSETS>                            171397
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                  0.035
<PER-SHARE-GAIN-APPREC>                            0.0
<PER-SHARE-DIVIDEND>                           (0.035)
<PER-SHARE-DISTRIBUTIONS>                          0.0
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<EXPENSE-RATIO>                                   0.29
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<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

Exhibit 99.B5



                        INVESTMENT ADVISORY AGREEMENT
                          CALVERT TAX-FREE RESERVES


         INVESTMENT ADVISORY AGREEMENT, made this 1st day of March, 1999, by
and between CALVERT ASSET MANAGEMENT COMPANY, INC., a Delaware corporation
(the "Advisor"), and CALVERT TAX-FREE RESERVES, a Massachusetts business
trust created pursuant to a Declaration of Trust filed with the Secretary of
State of the Commonwealth of Massachusetts (the "Trust"), both having their
principal place of business at 4550 Montgomery Avenue, Bethesda, Maryland.

         WHEREAS, the Trust is registered as an investment company under the
Investment Company Act of 1940, as amended (the "1940 Act"), for the purpose
of investing and reinvesting its assets in securities, and offering separate
series (the Fund(s)"), as set forth in its Declaration of Trust, its By-laws
and its registration statements under the 1940 Act and the Securities Act of
1933 (the "1933 Act"), as amended; and the Trust desires to avail itself of
the services, information, advice, assistance and facilities of an
investment advisor and to have an investment advisor perform for it various
investment advisory, research services and other management services; and

         WHEREAS, the Advisor is an investment advisor registered under the
Investment Advisers Act of 1940, as amended, and is engaged in the business
of rendering management and investment advisory services to investment
companies and desires to provide such services to the Trust;

         NOW, THEREFORE, in consideration of the terms and conditions
hereinafter set forth, it is agreed as follows:

1.       Employment of the Advisor. The Trust hereby employs the Advisor to
         manage the investment and reinvestment of the Trust assets, subject
         to the control and direction of the Trust's Board of Trustees, for
         the period and on the terms hereinafter set forth. The Advisor
         hereby accepts such employment and agrees during such period to
         render the services and to assume the obligations in return for the
         compensation provided herein. The Advisor shall for all purposes
         herein be deemed to be an independent contractor and shall, except
         as expressly provided or authorized (whether herein or otherwise),
         have no authority to act for or represent the Trust in any way or
         otherwise be deemed an agent of the Trust.

2.       Obligations of and Services to be Provided by the Advisor. The
         Advisor undertakes to provide the following services and to assume
         the following obligations:

         a.       The Advisor shall manage the investment and reinvestment
                  of each Fund's assets, subject to and in accordance with
                  the investment objectives and policies of each Fund and
                  any directions which the Trust's Board of Trustees may
                  issue from time to time. In pursuance of the foregoing,
                  the Advisor shall make all determinations with respect to
                  the investment of Fund assets and the purchase and sale of
                  portfolio securities and shall take such steps as may be
                  necessary to implement the same. Such determination and
                  services shall also include determining the manner in
                  which voting rights, rights to consent to corporate
                  action, any other rights pertaining to the Fund's
                  portfolio securities shall be exercised. The Advisor shall
                  render regular reports to the Trust's Board of Trustees
                  concerning the Trust's investment activities.

         b.       The Advisor shall, in the name of the Trust on behalf of
                  each Fund, place orders for the execution of the Trust's
                  portfolio transactions in accordance with the policies
                  with respect thereto set forth in the Trust's current
                  registration statement under the 1940 Act and the 1933
                  Act. In connection with the placement of orders for the
                  execution of the Trust's portfolio transactions the
                  Advisor shall create and maintain all necessary brokerage
                  records of the Trust in accordance with all applicable
                  laws, rules and regulations, including but not limited to
                  records required by Section 31(a) of the 1940 Act. All
                  records shall be the property of the Trust and shall be
                  available for inspection and use by the SEC, the Trust or
                  any person retained by the Trust. Where applicable, such
                  records shall be maintained by the Advisor for the periods
                  and the places required by Rule 31a-2 under the 1940 Act.

         c.       The Advisor shall bear its expenses of providing services
                  to the Trust pursuant to this Agreement except such
                  expenses as are undertaken by the Trust. In addition, the
                  Advisor shall pay the salaries and fees of all Trustees
                  and executive officers who are employees of the Advisor or
                  its affiliates ("Advisor Employees").

3.       Expenses of The Trust. The Trust shall pay all expenses other than
         those expressly assumed by the Advisor herein. Expenses payable by
         the Trust shall include, but are not limited to:

         a.        Fees to the Advisor as provided herein;

         b.        Legal and audit expenses;

         c.        Fees and expenses related to the registration and
                  qualification of the Trust and its shares for distribution
                  under federal and state securities laws;

         d.        Expenses of the administrative services agent, transfer
                  agent, registrar, custodian, dividend disbursing agent and
                  shareholder servicing agent;

         e.        Any telephone charges associated with shareholder
                  servicing or the maintenance of the Funds or Trust;

         f.        Salaries, fees and expenses of Trustees and executive
                  officers of the Trust, other than Advisor Employees;

         g.        Taxes and corporate fees levied against the Trust;

         h.        Brokerage commissions and other expenses associated with
                  the purchase and sale of portfolio securities for the
                  Trust;

         i.        Expenses, including interest, of borrowing money;

         j.        Expenses incidental to meetings of the Trust's
                  shareholders and the maintenance of the Trust's
                  organizational existence;

         k.        Expenses of printing stock certificates representing
                  shares of the Trust and expenses of preparing, printing
                  and mailing notices, proxy material, reports to regulatory
                  bodies and reports to shareholders of the Trust;

         l.        Expenses of preparing and typesetting of prospectuses of
                  the Trust;

         m.        Expenses of printing and distributing prospectuses to
                  shareholders of the Trust;

         n.        Association membership dues;

         o.        Insurance premiums for fidelity and other coverage;

         p.        Distribution Plan expenses, as permitted by Rule 12b-1
                  under the 1940 Act and as approved by the Board; and

         q.        Such other legitimate Trust expenses as the Board of
                  Trustees may from time to time determine are properly
                  chargeable to the Trust.

4.       Compensation of Advisor.

         a.        As compensation for the services rendered and obligations
                  assumed hereunder by the Advisor, the Trust shall pay to
                  the Advisor within ten (10) days after the last day of
                  each calendar month a fee equal on an annualized basis as
                  shown on Schedule A. Any amendment to the Schedule
                  pertaining to any new or existing Fund shall not be deemed
                  to affect the interest of any other Fund and shall not
                  require the approval of the shareholders of any other Fund.

         b.        Such fee shall be computed and accrued daily. Upon
                  termination of this Agreement before the end of any
                  calendar month, the fee for such period shall be prorated.
                  For purposes of calculating the Advisor's fee, the daily
                  value of a Fund's net assets shall be computed by the same
                  method as the Fund uses to compute the value of its net
                  assets in connection with the determination of the net
                  asset value of its shares.

         c.        The Advisor reserves the right (i) to waive all or part
                  of its fee and assume expenses of a Fund and (ii) to make
                  payments to brokers and dealers in consideration of their
                  promotional or administrative services.

5.       Activities of the Advisor. The services of the Advisor to the Trust
         hereunder are not to be deemed exclusive, and the Advisor shall be
         free to render similar services to others. It is understood that
         Trustees and officers of the Trust are or may become interested in
         the Advisor as stockholders, officers, or otherwise, and that
         stockholders and officers of the Advisor are or may become
         similarly interested in the Trust, and that the Advisor may become
         interested in the Trust as a shareholder or otherwise.

6.       Use of Names. The Trust shall not use the name of the Advisor in
         any prospectus, sales literature or other material relating to the
         Trust in any manner not approved prior thereto by the Advisor;
         provided, however, that the Advisor shall approve all uses of its
         name which merely refer in accurate terms to its appointment
         hereunder or which are required by the SEC; and, provided, further,
         that in no event shall such approval be unreasonably withheld. The
         Advisor shall not use the name of the Trust or any Trust in any
         material relating to the Advisor in any manner not approved prior
         thereto by the Trust; provided, however, that the Trust shall
         approve all uses of its name which merely refer in accurate terms
         to the appointment of the Advisor hereunder or which are required
         by the SEC; and, provide, further, that in no event shall such
         approval be unreasonably withheld.

7.       Liability of the Advisor. Absent willful misfeasance, bad faith,
         gross negligence, or reckless disregard of obligations or duties
         hereunder on the part of the Advisor, the Advisor shall not be
         subject to liability to the Trust or to any shareholder of the
         Trust for any act or omission in the course of, or connected with,
         rendering services hereunder or for any losses that may be
         sustained in the purchase, holding or sale of any security.

8.       Force Majeure. The Advisor shall not be liable for delays or errors
         occurring by reason of circumstances beyond its control, including
         but not limited to acts of civil or military authority, national
         emergencies, work stoppages, fire, flood, catastrophe, acts of God,
         insurrection, war, riot, or failure of communication or power
         supply. In the event of equipment breakdowns beyond its control,
         the Advisor shall take reasonable steps to minimize service
         interruptions but shall have no liability with respect thereto.

9.       Renewal, Termination and Amendment. This Agreement shall continue
         in effect with respect to the Trust, unless sooner terminated as
         hereinafter provided, through December 31, 1999, and indefinitely
         thereafter if its continuance shall be specifically approved at
         least annually by vote of the holders of a majority of the
         outstanding voting securities of the Trust or by vote of a majority
         of the Trust's Board of Trustees; and further provided that such
         continuance is also approved annually by the vote of a majority of
         the Trustees who are not parties to this Agreement or interested
         persons of the Advisor, cast in person at a meeting called for the
         purpose of voting on such approval, or as allowed by law. This
         Agreement may be terminated at any time, without payment of any
         penalty, by the Trust's Board of Trustees or by a vote of the
         majority of the outstanding voting securities of the Trust upon 60
         days' prior written notice to the Advisor and by the Advisor upon
         60 days' prior written notice to the Trust. This Agreement may be
         amended at any time by the parties, subject to approval by the
         Trust's Board of Trustees and, if required by applicable SEC rules
         and regulations, a vote of a majority of the Trust's outstanding
         voting securities. This Agreement shall terminate automatically in
         the event of its assignment. The terms "assignment" and "vote of a
         majority of the outstanding voting securities" shall have the
         meaning set forth for such terms in the 1940 Act.

10.      Severability. If any provision of this Agreement shall be held or
         made invalid by a court decision, statute, rule or otherwise, the
         remainder of this Agreement shall not be affected thereby.

11.      Miscellaneous. Each party agrees to perform such further actions
         and execute such further documents as are necessary to effectuate
         the purposes hereof. This Agreement shall be construed and enforced
         in accordance with and governed by the laws of the State of
         Maryland. The captions in this Agreement are included for
         convenience only and in no way define or delimit any of the
         provisions hereof or otherwise affect their construction or effect.

         IN WITNESS WHEREOF, the parties have duly executed this Agreement
as of the date first written above.

                                        CALVERT TAX-FREE RESERVES

By: /s/ Ron Wolfsheimer                 

                                        Title: Treasurer  

                                        CALVERT ASSET MANAGEMENT COMPANY, INC.

                                        By: /s/ Reno Martini

                                        Title: Senior Vice President



                        Investment Advisory Agreement
                    Calvert Asset Management Company, Inc.
                          Calvert Tax-Free Reserves

                                  Schedule A


As compensation pursuant to Section 4 of the Investment Advisory Agreement
between Calvert Asset Management Company, Inc. (the "Advisor") and Calvert
Tax-Free Reserves ("CTFR") dated March 1, 1999, the Advisor is entitled to
receive an annual advisory fee (the "Fee") as shown below. The Fee shall be
computed daily and payable monthly, based on the average daily net assets of
a Fund.

CTFR Money Market:                          0.25% to $500 million
                                            0.20% above $500 million
                                            0.15% above $1 billion

CTFR Limited-Term:                          0.60% to $500 million
                                            0.50% above $500 million
                                            0.40% above $1 billion

CTFR Long-Term:                             0.60% to $500 million
                                            0.50% above $500 million
                                            0.40% above $1 billion

CTFR California Money Market:               0.50% to $500 million
                                            0.45% above $500 million
                                            0.40% above $1 billion

CTFR Vermont Municipal:                     0.60% to $500 million
                                            0.50% above $500 million
                                            0.40% above $1 billion






<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000319676
<NAME> CALVERT TAX-FREE RESERVES
<SERIES>
   <NUMBER> 334
   <NAME> CALIFORNIA MONEY MARKET FUND
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JUL-01-1998
<PERIOD-END>                               DEC-31-1998
<INVESTMENTS-AT-COST>                           428451
<INVESTMENTS-AT-VALUE>                          428451
<RECEIVABLES>                                     7773
<ASSETS-OTHER>                                    1906
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  438130
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          555
<TOTAL-LIABILITIES>                                555
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        437673
<SHARES-COMMON-STOCK>                           437673
<SHARES-COMMON-PRIOR>                           362104
<ACCUMULATED-NII-CURRENT>                           18
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          (115)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                    437576
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                14134
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    2444
<NET-INVESTMENT-INCOME>                          11690
<REALIZED-GAINS-CURRENT>                            16
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                            11706
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (11680)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         225959
<NUMBER-OF-SHARES-REDEEMED>                   (156427)
<SHARES-REINVESTED>                               6037
<NET-CHANGE-IN-ASSETS>                           75595
<ACCUMULATED-NII-PRIOR>                              7
<ACCUMULATED-GAINS-PRIOR>                        (132)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             1867
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   2499
<AVERAGE-NET-ASSETS>                            373347
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                  0.031
<PER-SHARE-GAIN-APPREC>                            0.0
<PER-SHARE-DIVIDEND>                           (0.031)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   0.65
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000319676
<NAME> CALVERT TAX-FREE RESERVES
<SERIES>
   <NUMBER> 335
   <NAME> VERMONT MUNICIPAL PORTFOLIO
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JUL-01-1998
<PERIOD-END>                               DEC-31-1998
<INVESTMENTS-AT-COST>                            49296
<INVESTMENTS-AT-VALUE>                           52166
<RECEIVABLES>                                     1101
<ASSETS-OTHER>                                     113
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   53380
<PAYABLE-FOR-SECURITIES>                          2045
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                           43
<TOTAL-LIABILITIES>                               2088
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         48275
<SHARES-COMMON-STOCK>                             3150
<SHARES-COMMON-PRIOR>                             3126
<ACCUMULATED-NII-CURRENT>                          207
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                           (60)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                          2870
<NET-ASSETS>                                     51292
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                 2780
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     368
<NET-INVESTMENT-INCOME>                           2412
<REALIZED-GAINS-CURRENT>                           697
<APPREC-INCREASE-CURRENT>                        (259)
<NET-CHANGE-FROM-OPS>                             2850
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       (2385)
<DISTRIBUTIONS-OF-GAINS>                         (953)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                           2849
<NUMBER-OF-SHARES-REDEEMED>                     (3601)
<SHARES-REINVESTED>                               1135
<NET-CHANGE-IN-ASSETS>                           (105)
<ACCUMULATED-NII-PRIOR>                            181
<ACCUMULATED-GAINS-PRIOR>                          196
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              306
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    382
<AVERAGE-NET-ASSETS>                             50949
<PER-SHARE-NAV-BEGIN>                            16.45
<PER-SHARE-NII>                                  0.780
<PER-SHARE-GAIN-APPREC>                          0.130
<PER-SHARE-DIVIDEND>                           (0.769)
<PER-SHARE-DISTRIBUTIONS>                      (0.031)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              16.28
<EXPENSE-RATIO>                                   0.72
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

 Exhibit 99.B15                   

                   CALVERT TAX-FREE RESERVES MONEY MARKET
                                     and
                  CALVERT FIRST GOVERNMENT MONEY MARKET FUND

                 PLAN OF DISTRIBUTION PURSUANT TO RULE 12b-1
                   UNDER THE INVESTMENT COMPANY ACT OF 1940

                                   Class T

As permitted by Rule 12b-1 under the Investment company Act of 1940 and in
accordance with the terms and conditions of this Distribution Plan ("Plan"),
as hereinafter set forth, the above-referenced funds (each, "Fund") may
incur certain expenditures to promote the Fund and further the distribution
of shares of Fund.

         1. Payment of Distribution Expenses. (a) The Fund may incur
expenditures for certain expenses associated with the distribution of its
shares. Such distribution expenses include, but need not be limited to: the
cost of printing and mailing prospectuses, sales literature and other
relevant material to other than current shareholders of the Fund;
advertising and public relations; and payments to sales personnel,
broker-dealers and other third parties in return for distribution
assistance. Payments for distribution expenses incurred by the Fund pursuant
to this Plan may be made directly or indirectly; however, all agreements
with any person relating to the implementation of this Plan shall be in
writing, and such agreements shall be subject to termination, without
penalty, pursuant to the provisions of paragraph 2(c) of this Plan.

         (b) Distribution expenses shall be paid according to the attached
Schedule I.

         (c) Nothing in this Plan shall operate or be construed to limit the
extent to which the Fund's investment Advisor or any other person, other
than the Fund, at its expense apart from this Plan, may incur costs and pay
expenses associated with the distribution of Fund shares.

         2. Effective Date and Term.  (a) This Plan shall become effective
upon approval by majority votes of (i) the Board of Trustees of the Fund and
the Trustees who are not interested persons within the meaning of Section
2(a) (19) of the Investment Company Act of 1940 and have no direct or
indirect financial  interest in the operation of the Plan or in any
agreements related to the Plan (such trustees are hereinafter referred to as
"Qualified Trustees"), cast in person at a meeting called for the purpose of
voting on this Plan, and (ii) the outstanding voting securities of the Fund.

         b)       This Plan shall remain in effect for one year from its
adoption date and may continue in effect thereafter if this Plan is approved
at least annually by a majority vote of the trustees of the Fund, including
a majority of the Qualified Trustees, cast in person at a meeting called for
the purpose of voting on the Plan.

         c).      This Plan may be terminated at any time by a majority vote
of the Qualified Trustees or by vote of a majority of the outstanding voting
securities of the Fund or, with respect to a Portfolio, by a vote of a
majority of the outstanding voting securities of that Portfolio.

         3. Reports.  The person authorized to direct the disposition of
monies paid or payable by the Fund pursuant to the Plan shall provide, on at
least a quarterly basis, a written report to The Fund's Board of Trustees of
the amounts expended pursuant to this Plan or any related agreement and the
purposes for which such expenditures were made.

         4. Selection of Disinterested Trustees. While this Plan is in
effect, the selection and nomination of those trustees who are not
interested persons of the Fund within the meaning of Section 2(a)(19) of the
Investment Company Act of 1940 shall be committed to the discretion of the
trustees then in office who are not interested persons of the Fund.

         5. Effect of Plan. This Plan shall not obligate the Fund or any
other person to enter into an agreement with any particular person.

         6. Amendment. This Plan may not be amended to increase materially
the amount authorized in paragraph l(b) hereof to be spent for distribution
without approval by a vote of the majority of the outstanding securities of
the Fund or, with respect to a Portfolio, by a vote of a majority of the
outstanding voting securities of the Portfolio.  All material amendments to
this Plan must be approved by a majority vote of the Board of Trustees of
the Fund, and of the Qualified Trustees, cast in person at a meeting called
for the purpose of voting thereon.


<PAGE>


                                  SCHEDULE I

                                   CLASS T

                 PLAN OF DISTRIBUTION PURSUANT TO RULE 12B-1
                   UNDER THE INVESTMENT COMPANY ACT OF 1940



Class T Distribution Plan expenses incurred by the Funds shall be paid
according to the following annual rate, based on the Class T average daily
net assets in that Fund:

Calvert Tax-Free Reserves
     Money Market Portfolio                          0.25%

Calvert First Government
     Money Market Fund                               0.25%





Exhibit 99.B9.c.


                          THE CALVERT GROUP OF FUNDS

                        Rule 18f-3 Multiple Class Plan
                          as approved by the Boards
                 in January 1996 and as amended and restated
                     December 1998 Pursuant to Rule 18f-3
                   Under the Investment Company Act of 1940


         Rule 18f-3 under the Investment Company Act of 1940, as amended
(the "1940 Act"), requires that an investment company desiring to offer
multiple classes of shares pursuant to the Rule adopt a plan setting forth
the differences among the classes with respect to shareholder services,
distribution arrangements, expense allocations and any related conversion
features or exchange privileges.  Any material amendment to the plan must be
approved by the investment company's Board of Trustees/Directors, including
a majority of the disinterested Board members, who must find that the plan
is in the best interests of each class individually and the investment
company as a whole.

         This Rule 18f-3 Multiple Class Plan ("Plan") shall apply to those
funds in the Calvert Group of Funds listed in Exhibit I (each a "Fund" and
collectively, "Funds") and to any future fund for which this Plan has been
approved in accordance with the above paragraph.

         The provisions of this Plan are severable for each Fund or Series
thereof ("Series") or Class, and whenever action is to be taken with respect
to this Plan, that action must be taken separately for each Fund, Series or
Class affected by the matter.
 
         1.       Class Designation.  A Fund may offer shares designated
Class A, Class B, Class C , Class I, and for certain money market
portfolios, Class O and  Class T.

         2.       Differences in Availability.  Class A, Class B, Class C,
and Class O shares shall each be available through the same distribution
channels, except that (a) Class B shares may not be available through some
dealers and are not available for purchases of $500,000 or more, (b) Class B
shares of Calvert First Government Money Market Fund are available only
through exchange from Class B or Class C shares of another Calvert Fund, and
(c) Class C shares may not be available through some dealers and are not
available for purchases of $1 million or more.  Class I shares are generally
available only directly from Calvert Group and not through dealers, and each
Class I shareholder must maintain a $1 million minimum account balance.
Class T shares are only available through certain dealers.

         3.       Differences in Services.  The services offered to
shareholders of each Class shall be substantially the same, except that the
Rights of Accumulation, Letters of Intent and Reinvestment Privileges shall
be available only to holders of Class A shares.  Class I purchases and
redemptions may only be made by bankwire.  Class T shares have limited
services by Calvert, rather the services to shareholders are provided by the
dealer offering the Class T shares.

         4.       Differences in Distribution Arrangements.  Class A shares
shall be offered with a front-end sales charge, as such term is defined in
Rule 2830 of the Conduct Rules of the National Association of Securities
Dealers, Inc.  The amount of the sales charge on Class A shares is set forth
at Exhibit II.   Class A shares shall be subject to a Distribution Plan
adopted pursuant to Rule 12b-1 under the 1940 Act.  The amount of the
Distribution Plan expenses for Class A shares, as set forth at Exhibit  II,
are used to pay the Fund's principal underwriter for distributing and or
providing services to the Fund's Class A shares. This amount includes a
service fee at the annual rate of .25 of 1% of the value of the average
daily net assets of Class A.

         Class B shares shall be offered with a contingent deferred sales
charge ("CDSC") and no front-end sales charge.  The amount of the CDSC on
Class B shares is set forth at Exhibit II.  Class B shares shall be subject
to a Distribution Plan adopted pursuant to Rule 12b-1 under the 1940 Act.
The amount of the Distribution Plan expenses for Class B shares, as set
forth at Exhibit II, are used to pay each Fund's principal underwriter for
distributing and or providing services to the Fund's Class B shares.  This
amount includes a service fee at the annual rate of .25 of 1% of the value
of the average daily net assets of Class B.

         Class C shares shall not be subject to a front-end sales charge,
but shall be subject to a 1.00% CDSC if the shares are redeemed within one
year of purchase.  Class C shares shall be subject to a Distribution Plan
adopted pursuant to Rule 12b-1 under the 1940 Act.  The amount of the
Distribution Plan expenses for Class C shares are set forth at Exhibit II.
The Class C Distribution Plan pays each applicable Fund's principal
underwriter for distributing and or providing services to such Fund's Class
C shares.  This amount includes a service fee at the annual rate of .25 of
1% of the value of the average daily net assets of Class C.

         Class I and Class O shares shall be subject to neither a front-end
sales charge, nor a CDSC, nor are they subject to a Distribution Plan
adopted pursuant to Rule 12b-1 under the 1940 Act.
         Class T shares shall be subject to neither a front-end sales
charge, nor a CDSC, but they are subject to a Distribution Plan adopted
pursuant to Rule 12b-1 under the 1940 Act.

         5.       Expense Allocation.  The following expenses shall be
allocated, to the extent practicable, on a Class-by-Class basis:  (a)
Distribution Plan fees; (b) transfer agent fees; (c) administrative service
fees; (d) printing and postage expenses payable by a Fund relating to
preparing and distributing materials, such as proxies, reports and
prospectuses to current shareholders of a specific class; (e) class specific
state notification fees; (f) class specific litigation or other legal
expenses; (g) certain class specific reimbursement from the Advisor; and (h)
certain class specific contract services (e.g., proxy solicitation).

         6.       Conversion Features.  Class B shares shall be subject to
an automatic conversion feature into Class A shares after they have been
held for that number of years set forth in Exhibit II.  Class A, Class C
,Class I, Class O, and Class T are not subject to automatic conversion.

         7.       Exchange Privileges.  Class A shares shall be exchangeable
only for: (a) Class A shares of other funds managed or administered by the
Calvert Group; (b) shares of funds managed or administered by the Calvert
Group which do not have separate share classes; and (c) shares of certain
other funds specified from time to time.

         Class B shares shall be exchangeable only for: (a) Class B shares
of other funds managed or administered by the Calvert Group; (b) Class A
shares of other funds managed or administered by the Calvert Group, if the
front-end load on the Class A shares is paid at the time of the exchange;
and (c) shares of certain other funds specified from time to time.

         Class C shares shall be exchangeable only for: (a) Class C shares
of other funds managed or administered by the Calvert Group and Class B
shares of Calvert First Government Money Market Fund; (b) Class A shares of
other funds managed or administered by the Calvert Group, if the front-end
load on the Class A shares is paid at the time of the exchange; and (c)
shares of certain other funds specified from time to time.

         Class I shares shall be exchangeable only for: (a) Class I shares
of other funds managed or administered by the Calvert Group; (b) Class A
shares of other funds managed or administered by the Calvert Group, if the
front-end load on the Class A shares is paid at the time of the exchange;
and (c) shares of certain other funds specified from time to time.

         Class T shares shall be exchangeable only for: (a) Class T shares
of other funds managed or administered by the Calvert Group; (b) Class A
shares of other funds managed or administered by the Calvert Group, if the
front-end load on the Class A shares is paid at the time of the exchange;
and (c) shares of certain other funds specified from time to time.


Dec. 1998

<PAGE>

Exhibit I

The Calvert Fund

Calvert Tax-Free Reserves

Calvert Municipal Fund

Calvert Social Investment Fund

Calvert World Values Fund

Calvert New World Fund

First Variable Rate Fund
                                    <PAGE>

                    Calvert Social Investment Fund (CSIF)


                           Maximum Class A       Maximum      Maximum
                           Front-End Sales       Class A      Class C
                           Charge                12b-1 Fee    12b-1 Fee

CSIF Managed Growth        4.75%                 0.35%        1.00%

CSIF Equity                4.75%                 0.35%        1.00%

CSIF Managed Index         4.75%                 0.25%        1.00%

CSIF Bond                  3.75%                 0.35%        1.00%


Class B
                                               Balanced,
                                               Equity, &             Max.
Contingent Deferred Sales Charge               Managed               12b-1
                                               Index        Bond     Fee

Shares held less than one year after purchase  5%           4%       1.00%
More than one year but less than two           4%           3%
More than two years but less than three        4%           2%
More than three years but less than four       3%           1%
More than four years but less than five        2%
More than five years but less than six         1%

Converts to Class A after                      8 yrs.       6yrs.

February 1998
<PAGE>

Exhibit II
                       Calvert Tax-Free Reserves (CTFR)



                    Maximum Class A     Maximum    Maximum    Maximum
                    Front-End Sales     Class A    Class C    Class T
                    Charge              12b-1 Fee  12b-1 Fee  12b-1 Fee

CTFR Money Mkt.     N/A                 N/A        N/A        0.25%

CTFR Long-Term      3.75%               0.35%      1.00%      N/A

CTFR Vermont        3.75%               N/A        1.00%      N/A


Class B
                                               Long-Term &    Maximum
Contingent Deferred Sales Charge               Vermont        12b-1 Fee

Shares held less than one year after purchase  4%             1.00%
More than one year but less than two           3%
More than two years but less than three        2%
More than three years but less than four       1%

Converts to Class A after                      6yrs.

December 1998

                                    <PAGE>

                            Calvert Municipal Fund


                         Maximum Class A       Maximum      Maximum
                         Front-End Sales       Class A      Class C
                         Charge                12b-1 Fee    12b-1 Fee

National Intermediate    2.75%                 0.25%        N/A

California Intermediate  2.75%                 0.25%        N/A

Maryland Intermediate    2.75%                 0.25%        N/A

Virginia Intermediate    2.75%                 0.25%        N/A

Class B
                                                            Maximum
Contingent Deferred Sales Charge                 CMF        12b-1 Fee

Shares held less than one year after purchase    3%         1.00%
More than one year but less than two             2%
More than two years but less than three          2%
More than three years but less than four         1%

Converts to Class A after                        4 yrs.


<PAGE>

Exhibit II
                               The Calvert Fund



                         Maximum Class A       Maximum      Maximum
                         Front-End Sales       Class A      Class C
                         Charge                12b-1 Fee    12b-1 Fee

New Vision Small Cap     4.75%                 0.25%        1.00%

Calvert Income Fund      3.75%                 0.50%        1.00%


Class B
                                                                Max.
                                                                12b-1
Contingent Deferred Sales Charge          New Vision   Income   Fee

Shares held less than one year            5%           4%       1.00%
More than one year but less than two      4%           3%
More than two years but less than three   4%           2%
More than three years but less than four  3%           1%
More than four years but less than five   2%
More than five years but less than six    1%

Converts to Class A after                 8 yrs.       6yrs.


<PAGE>

Exhibit II
                          Calvert World Values Fund


                             Maximum Class A       Maximum      Maximum
                             Front-End Sales       Class A      Class C
                             Charge                12b-1 Fee    12b-1 Fee

International Equity         4.75%                 0.35%        1.00%

Capital Accumulation         4.75%                 0.35%        1.00%


Class B
                                                              Maximum
Contingent Deferred Sales Charge                 CWVF         12b-1 Fee

Shares held less than one year after purchase    5%           1.00%
More than one year but less than two             4%
More than two years but less than three          4%
More than three years but less than four         3%
More than four years but less than five          2%
More than five years but less than six           1%

Converts to Class A after                        8 yrs.


February 1998

<PAGE>

Exhibit II
                            Calvert New World Fund


                      Maximum Class A       Maximum           Maximum
                      Front-End Sales       Class A           Class C
                      Charge                12b-1 Fee         12b-1 Fee

Calvert New Africa    4.75%                 0.25%             1.00%


Class B
                                                              Maximum
Contingent Deferred Sales Charge                 New Africa   12b-1 Fee

Shares held less than one year after purchase    5%           1.00%
More than one year but less than two             4%
More than two years but less than three          4%
More than three years but less than four         3%
More than four years but less than five          2%
More than five years but less than six           1%

Converts to Class A after                        8 yrs.

<PAGE>

Exhibit II
                           First Variable Rate Fund


                      Maximum Class A      Max.         Max.         Max.
                      Front-End Sales      Class A      Class C      Class T
                      Charge               12b-1        12b-1        12b-1
                                           Fee          Fee          Fee

Calvert First Gov't.
Money Market          N/A                  N/A          1.00%        0.25%

Class B
                                                                Maximum
Contingent Deferred Sales Charge                                12b-1 Fee

CDSC of original Class B Fund purchased is applied upon
redemption from Class B of First Government Money Market        1.00%

Conversion period of original Class B Fund purchased is applied.

December 1998





Exhibit 1

                            DISTRIBUTION AGREEMENT


         This DISTRIBUTION AGREEMENT, dated as of December 2, 1998 by and
between EACH CALVERT FUND LISTED IN THE SCHEDULE OF FUNDS ATTACHED HERETO AS
SCHEDULE I (each a "Fund" and together the "Funds"), as such schedule may,
from time to time be amended, and CALVERT DISTRIBUTORS, INC., a Delaware
corporation (the "Distributor").

         WHEREAS, each Fund is registered as an open-end investment company
under the Investment Company Act of 1940 (the "1940 Act") and has registered
its shares, including shares of its series portfolios (the "Series"), for
sale to the public under the Securities Act of 1933 (the "1933 Act") and
various state securities laws;

         WHEREAS, each Fund wishes to retain the Distributor as the
principal underwriter in connection with the offer and sale of shares of the
Series (the "Shares") and to furnish certain other services to the Series as
specified in this Agreement;

         WHEREAS, this contract has been approved and amended and restated
on this day by the Trustees/Directors in anticipation of the Distributor
offering Class T shares;

         WHEREAS, the Distributor is willing to act as principal underwriter
and to furnish such services on the terms and conditions hereinafter set
forth;

         NOW, THEREFORE, in consideration of the promises and mutual
covenants herein contained, it is agreed as follows:

         1.       Each Fund hereby appoints the Distributor as principal
underwriter in connection with the offer and sale of its Shares. The
Distributor shall, as agent for each Fund, subject to applicable federal and
state law and the Declaration of Trust or Articles of Incorporation, and
By-laws of the applicable Fund and in accordance with the representations in
the applicable Fund's Registration Statement and Prospectus, as such
documents may be amended from time to time: (a) promote the Series; (b)
enter into appropriate dealer agreements with other registered
broker-dealers to further distribution of the Shares; (c) solicit orders for
the purchase of the Shares subject to such terms and conditions as the
applicable Fund may specify; (d) transmit promptly orders and payments for
the purchase of Shares and orders for redemption of Shares to the applicable
Fund's transfer agent; and (e) provide services agreed upon by the
applicable Fund to Series shareholders; provided, however, that the
Distributor may sell no Shares pursuant to this Agreement until the
Distributor is notified that a Fund's Registration Statement under the 1933
Act, authorizing the sale of such Shares through the Distributor, has become
effective. The Distributor shall comply with all applicable federal and
state laws and offer the Shares on an agency or "best efforts" basis under
which a Fund shall only issue such Shares as are actually sold.

         2.       The public offering price of the Shares shall be the net
asset value ("NAV") per share (as determined by the applicable Fund) of the
outstanding Shares of the Series, plus the applicable sales charge, if any,
as set forth in the Fund's then current Prospectus. Each Fund shall furnish
the Distributor with a statement of each computation of NAV and of the
details entering into such computation.

         3.       Compensation.

         a.       Distribution Fee.

         i. Class A. In consideration of the Distributor's services as
distributor for the Class A Shares of a Fund, each Fund may pay to the
Distributor the Distribution Fee as set forth in Schedule II to this
Agreement that is payable pursuant to the Fund's Distribution Plan.

         ii. Class B. In consideration of the Distributor's services as
distributor for the Class B Shares of a Fund, each Fund shall pay to the
Distributor (or its designee or transferee) the Distributor's Allocable
Portion of the Distribution Fee; (as set forth in Schedule II to this
Agreement) that is payable pursuant to the Fund's Distribution Plan in
respect of the Class B Shares of a Fund. For purposes of this Agreement, the
Distributor's "Allocable Portion" of the Distribution Fee shall be 100% of
such Distribution Fee unless or until the Fund uses a principal underwriter
other than the Distributor and thereafter the Allocable Portion shall be the
portion of the Distribution Fee attributable to (i) Class B Shares of a Fund
sold by the Distributor ("Commission Shares"), (ii) Class B Shares of the
Fund issued in connection with the exchange of Commission Shares of another
Fund, and (iii) Class B Shares of the Fund issued in connection with the
reinvestment of dividends and capital gains.

         The Distributor's Allocable Portion of the Distribution Fee and the
contingent deferred sales charges arising in respect of Class B Shares taken
into account in computing the Distributor's Allocable Portion shall be
limited under Rule 2830 of the Conduct Rules or other applicable regulations
of the NASD as if the Class B Shares taken into account in computing the
Distributor's Allocable Portion themselves constituted a separate class of
shares of a Fund.

         The services rendered by the Distributor for which the Distributor
is entitled to receive the Distributor's Allocable Portion of the
Distribution Fee shall be deemed to have been completed at the time of the
initial purchase of the Commission Shares (whether of the Fund or another
Fund in the Calvert Group of Funds) taken into account in computing the
Distributor's Allocable Portion. Notwithstanding anything to the contrary in
this Agreement, the Distributor shall be paid its Allocable Portion of the
Distribution Fee notwithstanding the Distributor's termination as principal
underwriter of the Class B Shares of a Fund, or any termination of this
Agreement other than in connection with a Complete Termination (as defined
in the Distribution Plan) of the Class B Distribution Plan as in effect on
the date of this Agreement. Except as provided in the preceding sentence, a
Fund's obligation to pay the Distribution Fee to the Distributor shall be
absolute and unconditional and shall not be subject to any dispute, offset,
counterclaim or defense whatsoever, (it being understood that nothing in
this sentence shall be deemed a waiver by a Fund of its right separately to
pursue any claims it may have against the Distributor and to enforce such
claims against any assets (other than its rights to be paid its Allocable
Portion of the Distribution Fee and to be paid the contingent deferred sales
charges) of the Distributor.

         iii. Class C. In consideration of the Distributor's services as
distributor for the Class C Shares of a Fund, each Fund shall pay to the
Distributor the Distribution Fee as set forth in Schedule II to this
Agreement that is payable pursuant to the Fund's Distribution Plan.

         b.       Service Fee. As additional compensation, for Class A,
Class B, Class C and Class T Shares of each Series, applicable Funds shall
pay the Distributor a service fee (as that term is defined by the National
Association of Securities Dealers, Inc. ("NASD")) as set forth in Schedule
III to this Agreement that is payable pursuant to the Fund's Distribution
Plan.

         c.       Front-end Sales Charges. As additional compensation for
the services performed and the expenses assumed by the Distributor under
this Agreement, the Distributor may, in conformity with the terms and
conditions set forth in the then current Prospectus of each Fund, impose and
retain for its own account the amount of the front-end sales charge, if any,
and may reallow a portion of any front-end sales charge to other
broker-dealers, all in accordance with NASD rules.

         d.       Contingent Deferred Sales Charge. Each Fund will pay to
the Distributor (or its designee or transferee) in addition to the fees set
forth in Section 3 hereof any contingent deferred sales charge imposed on
redemptions of that Fund's Class B and Class C Shares upon the terms and
conditions set forth in the then current Prospectus of that Fund.
Notwithstanding anything to the contrary in this Agreement, the Distributor
shall be paid such contingent deferred sales charges in respect of Class B
Shares taken into account in computing the Distributor's Allocable Portion
of the Distribution Fee notwithstanding the Distributor's termination as
principal underwriter of the Class B shares of a Fund or any termination of
this Agreement other than in connection with a Complete Termination of the
Class B Distribution Plan as in effect on the date of this Agreement. Except
as provided in the preceding sentence, a Fund's obligation to remit such
contingent deferred sales charges to the Distributor shall not be subject to
any dispute, offset, counterclaim or defense whatsoever, it being understood
that nothing in this sentence shall be deemed a waiver by a Fund of its
right separately to pursue any claims it may have against the Distributor
and to enforce such claims against any assets (other than the Distributor's
right to be paid its Allocable Portion of the Distribution Fee and to be
paid the contingent deferred sales charges) of the Distributor. No Fund will
waive any contingent deferred sales charge except under the circumstances
set forth in the Fund's current Prospectus without the consent of the
Distributor (or, if rights to payment have been transferred, the
transferee), which consent shall not be unreasonably withheld.

         4.       Payments to Distributor's Transferees. The Distributor may
transfer the right to payments hereunder (but not its obligations hereunder)
in order to raise funds to cover distribution expenditures, and any such
transfer shall be effective upon written notice from the Distributor to the
Fund. In connection with the foregoing, the Fund is authorized to pay all or
a part of the Distribution Fee and/or contingent deferred sales charges in
respect of Class B Shares directly to such transferee as directed by the
Distributor.

         5.       Changes in Computation of Fee, etc. As long as the Class B
Distribution Plan is in effect, a Fund shall not change the manner in which
the Class B Distribution Fee is computed (except as may be required by a
change in applicable law or a change in accounting policy adopted by the
Investment Companies Committee of the AICPA and approved by FASB that
results in a determination by a Fund's independent accountants that any of
the sales charges in respect of such Fund, which are not contingent deferred
sales charges and which are not yet due and payable, must be accounted for
by such Fund as a liability in accordance with GAAP).

         6.       As used in this Agreement, the term "Registration
Statement" shall mean the registration statement most recently filed by a
Fund with the Securities and Exchange Commission and effective under the
1933 Act, as such Registration Statement is amended by any amendments
thereto at the time in effect, and the term "Prospectus" shall mean the form
of prospectus filed by a Fund as part of the Registration Statement.

         7.       The Distributor shall print and distribute to prospective
investors Prospectuses, and may print and distribute such other sales
literature, reports, forms, and advertisements in connection with the sale
of the Shares as comply with the applicable provisions of federal and state
law. In connection with such sales and offers of sale, the Distributor shall
give only such information and make only such statements or representations,
and require broker-dealers with whom it enters into dealer agreements to
give only such information and make only such statements or representations,
as are contained in the Prospectus or in information furnished in writing to
the Distributor by a Fund. The Funds shall not be responsible in any way for
any other information, statements or representations given or made by the
Distributor, other broker-dealers, or the representatives or agents of the
Distributor or such broker-dealers. Except as specifically permitted under
the Distribution Plan under Rule 12b-1 under the 1940 Act, as provided in
paragraph 3 of this Agreement, the Funds shall bear none of the expenses of
the Distributor in connection with its offer and sale of the Shares.

         8.       Each Fund agrees at its own expense to register the Shares
with the Securities and Exchange Commission, state and other regulatory
bodies, and to prepare and file from time to time such Prospectuses,
amendments, reports and other documents as may be necessary to maintain the
Registration Statement. Each Fund shall bear all expenses related to
preparing and typesetting its Prospectus(es) and other materials required by
law and such other expenses, including printing and mailing expenses related
to the Fund's communications with persons who are shareholders of such Fund.

         9.       Each Fund agrees to indemnify, defend and hold the
Distributor, its several officers and directors, and any person who controls
the Distributor within the meaning of Section 15 of the 1933 Act, free and
harmless from and against any and all claims, demands, liabilities and
expenses (including the cost of investigating or defending such claims,
demands or liabilities and any counsel fees incurred in connection
therewith) which the Distributor, its officers or directors, or any such
controlling person may incur, under the 1933 Act or under common law or
otherwise, arising out of or based upon any alleged untrue statement of a
material fact contained in its Registration Statement or Prospectus or
arising out of or based upon any alleged omission to state a material fact
required to be stated in either thereof or necessary to make the statements
in either thereof not misleading, provided that in no event shall anything
contained in this Agreement be construed so as to protect the Distributor
against any liability to a Fund or its shareholders to which the Distributor
would otherwise be subject by reason of willful misfeasance, bad faith, or
gross negligence, in the performance of its duties, or by reason of its
reckless disregard of its obligations and duties under this Agreement.

         10.      The Distributor agrees to indemnify, defend and hold each
Fund, their several officers and directors, and any person who controls a
Fund within the meaning of Section 15 of the 1933 Act, free and harmless
from and against any and all claims, demands, liabilities and expenses
(including the cost of investigating or defending such claims, demands or
liabilities and any counsel fees incurred in connection therewith) which a
Fund, its officers or directors, or any such controlling person may incur,
under the 1933 Act or under common law or otherwise, arising out of or based
upon any alleged untrue statement or a material fact contained in
information furnished in writing by the Distributor to the Funds for use in
the Registration Statement or Prospectus(es) or arising out of or based upon
any alleged omission to state a material fact in connection with such
information required to be stated in the Registration Statement or
Prospectus(es) or necessary to make such information not misleading.

         11.      Each Fund reserves the right at any time to withdraw all
offerings of the Shares by written notice to the Distributor at its
principal office.

         12.       The Distributor is an independent contractor and shall be
agent for a Fund only in respect to the offer, sale and redemption of that
Fund's Shares.

         13.      The services of the Distributor to a Fund under this
Agreement are not to be deemed exclusive, and the Distributor shall be free
to render similar services or other services to others so long as its
services hereunder are not impaired thereby.

         14.      The Distributor acknowledges that it has received notice
of and accepts the limitations upon the liability of any Fund organized as a
business trust set forth in such Fund's Declaration of Trust. The
Distributor agrees that the obligations of such Funds hereunder in any case
shall be limited to such Funds and to their assets and that the Distributor
shall not seek satisfaction of any such obligation from the shareholders of
such a Fund nor from any Trustee, officer, employee or agent of such Fund.

         15.      The Funds shall not use the name of the Distributor in any
Prospectus, sales literature or other material relating to the Funds in any
manner not approved prior thereto by the Distributor; provided, however,
that the Distributor shall approve all uses of its name which merely refer
in accurate terms to its appointment hereunder or which are required by the
Securities and Exchange Commission or a State Securities Commission; and,
provided further, that in no event shall such approval be unreasonably
withheld. The Distributor shall not use the name of any Fund in any material
relating to the Distributor in any manner not approved prior thereto by the
Fund; provided, however that the Funds shall approve all uses of their names
which merely refer in accurate terms to the appointment of the Distributor
hereunder or which are required by the Securities and Exchange Commission or
a State Securities Commission; and, provided further, that in no event shall
such approval be unreasonably withheld.

         16.      The Distributor shall prepare written reports for the
Board of Trustees/Directors of each Fund on a quarterly basis showing
information concerning services provided and expenses incurred which are
related to this Agreement and such other information as from time to time
shall be reasonably requested by a Fund's Board of Trustees/Directors.

         17.      As used in this Agreement, the terms "assignment,"
"interested person," and "majority of the outstanding voting securities"
shall have the meaning given to them by Section 2(a) of the 1940 Act,
subject to such exemptions as may be granted by the Securities and Exchange
Commission by any rule, regulation or order; provided, however that, in
order to obtain financing, the Distributor may assign to a lending
institution the payments due to the Distributor under this Agreement without
it constituting an assignment of the Agreement.

         18.      Subject to the provisions of sections 19 and 20 below,
this Agreement will remain in effect for two years from the date of is
execution and from year to year thereafter, provided that the Distributor
does not notify a Fund in writing at least sixty (60) days prior to the
expiration date in any year that it does not wish continuance of the
Agreement as to such Fund for an additional year.

         19.      Termination. As to any particular Fund (or Series
thereof), this Agreement shall automatically terminate in the event of its
assignment and may be terminated at any time without the payment of any
penalty by a Fund or by the Distributor on sixty (60) days' written notice
to the other party. A Fund may effect such termination by a vote of (i) a
majority of the Board of Trustees/Directors of the Fund, (ii) a majority of
the Trustees/Directors who are not interested persons of the Fund, who are
not parties to this Agreement or interested persons of such parties, and who
have no direct or indirect financial interest in the operation of the
Distribution Plan, in this Agreement or in any agreement related to such
Fund's Distribution Plan (the "Rule 12b-1 Trustees/Directors"), or (iii) a
majority of the outstanding voting securities of the relevant Series.

         20.      This Agreement shall be submitted for renewal to the Board
of Trustees/Directors of each Fund at least annually and shall continue in
effect only so long as specifically approved at least annually (i) by a
majority vote of the Fund's Board of Trustees/Directors, and (ii) by the
vote of the majority of the Rule 12b-1 Trustees/Directors of the Fund, cast
in person at a meeting called for the purpose of voting on such approval.

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement
to be executed on the date first above written by their officers thereunto
duly authorized.


Attest:                                     EACH FUND LISTED IN THE
                                            ATTACHED SCHEDULE I

By: /s/  Edwidge Saint-Felix                By: /s/  William M. Tartikoff
                                                     Vice President



Attest:  CALVERT DISTRIBUTORS, INC.


By: /s/  Edwidge Saint-Felix                By: /s/  Ronald M. Wolfsheimer
                                                     Senior Vice President


<PAGE>


                                  SCHEDULE I


The Calvert Fund

Calvert Tax-Free Reserves

Calvert Municipal Fund

Calvert Social Investment Fund

Calvert World Values Fund

Calvert New World Fund

First Variable Rate Fund

<PAGE>

SCHEDULE II

Fees are expressed as a percentage of average annual daily net assets, and
are payable monthly.

Distribution Fee
                               Class A*   Class B    Class C  Class I
The Calvert Fund
     New Vision
         Small Cap Fund        N/A        0.75       0.75     N/A
     Calvert Income Fund       0.25       0.75       0.75     N/A

Calvert Tax-Free Reserves
     Money Market Portfolio    N/A        N/A        N/A      N/A
     Limited-Term Portfolio    N/A        N/A        N/A      N/A
     Long-Term Portfolio       0.10       0.75       0.75     N/A
     CA. Money Market          N/A        N/A        N/A      N/A
     Vermont Municipal         N/A        0.75       0.75     N/A

Calvert Municipal Fund
     National Interm. Fund     N/A        0.75       N/A      N/A
     California Interm. Fund   N/A        0.75       N/A      N/A
     Maryland Interm. Fund     N/A        0.75       N/A      N/A
     Virginia Interm. Fund     N/A        0.75       N/A      N/A

Calvert Social Investment Fund
     Balanced Portfolio        0.10       0.75       0.75     N/A
     Equity Portfolio          0.10       0.75       0.75     N/A
     Bond Portfolio            0.10       0.75       0.75     N/A
     Managed Index             N/A        0.75       0.75     N/A
     Money Market              N/A        N/A        N/A      N/A

Calvert World Values Fund
     Capital Accum. Fund       0.10       0.75       0.75     N/A
     International Equity Fund 0.10       0.75       0.75     N/A

Calvert New World Fund
     Calvert New Africa Fund   N/A        0.75       0.75     N/A

First Variable Rate Fund
     Calvert First Gov't
         Money Mkt             N/A        0.75       N/A      N/A


*Distributor reserves the right to waive all or a portion of the
distribution fee from time to time.

DATED: February 1998

<PAGE>

SCHEDULE III

Fees are expressed as a percentage of average annual daily net assets and
are payable monthly.

Service Fee (%)

                               Class    Class    Class    Class   Class
                               A1       B        C        I       T
The Calvert Fund
     New Vision
         Small Cap Fund        0.25     0.25     0.25     N/A     N/A
     Calvert Income Fund       0.25     0.25     0.25     N/A     N/A

Calvert Tax-Free Reserves
     Money Market Portfolio    N/A      N/A      N/A      N/A     0.25
     Limited-Term Portfolio    N/A      N/A      N/A      N/A     N/A
     Long-Term Portfolio       0.25     0.25     0.25     N/A     N/A
     CA Money Market           N/A      N/A      N/A      N/A     N/A
     Vermont Municipal         N/A      0.25     0.25     N/A     N/A

Calvert Municipal Fund
     National Interm. Fund     0.25     0.25     N/A      N/A     N/A
     California Interm. Fund   0.25     0.25     N/A      N/A     N/A
     Maryland Interm. Fund     0.25     0.25     N/A      N/A     N/A
     Virginia Interm. Fund     0.25     0.25     N/A      N/A     N/A

Calvert Social Investment Fund
     Balanced Portfolio        0.252    0.25     0.25     N/A     N/A
     Equity Portfolio          0.25     0.25     0.25     N/A     N/A
     Bond Portfolio            0.25     0.25     0.25     N/A     N/A
     Managed Index             0.25     0.25     0.25     N/A     N/A
     Money Market              0.25     N/A      N/A      N/A     N/A

Calvert World Values Fund
     Capital Accum. Fund       0.25     0.25     0.25     N/A     N/A
     International Equity Fund 0.25     0.25     0.25     N/A     N/A

Calvert New World Fund
     Calvert New Africa Fund   0.25     0.25     0.25     N/A     N/A

First Variable Rate Fund
     Calvert First Gov't
         Money Mkt             N/A      0.25     N/A      N/A     0.25

DATED: December 1998


- --------
1 Distributor reserves the right to waive all or a portion of the service
fees from time to time. For money market portfolios, Class A shall refer to
Class O, or if the portfolio does not have multiple classes, then to the
portfolio itself.
2 Distributor charges the service fee only on assets in excess of $30
million.



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