CALVERT FUND
497, 1995-09-29
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PROSPECTUS 
January 31, 1995, As Revised September 30, 1995 

THE CALVERT FUND 
CALVERT INCOME FUND 
4550 Montgomery Avenue, Bethesda, Maryland 20814 

INVESTMENT  OBJECTIVE Calvert Income Fund seeks to maximize long-term income, to
the extent  consistent with prudent  investment  management and  preservation of
capital, through investment in bonds and other income producing securities.

The Fund offers two classes of shares,  each with  different  expense levels and
sales  charges.  You may  choose to  purchase  (i) Class A shares,  with a sales
charge imposed at the time you purchase the shares  ("front-end  sales charge");
or (ii) Class C shares  which  impose  neither a  front-end  sales  charge nor a
contingent  deferred sales charge.  Class C shares are not available through all
dealers.  Class C shares have a higher  level of  expenses  than Class A shares,
including  higher Rule 12b-1 fees. These  alternatives  permit you to choose the
method of purchasing  shares that is most  beneficial  to you,  depending on the
amount of the  purchase,  the length of time you expect to hold the shares,  and
other circumstances. See "Alternative Sales Options" for further details.

TO OPEN AN ACCOUNT Call your broker, or complete and return the enclosed Account
Application. Minimum investment is $2,000.

ABOUT THIS  PROSPECTUS  Please  read this  Prospectus  before  investing.  It is
designed to provide you with  information you ought to know before investing and
to help you decide if the Fund's  goals match your own.  Keep this  document for
future reference.

A Statement of Additional  Information  for the Fund (dated January 31, 1995 and
revised  September  30,  1995) has been filed with the  Securities  and Exchange
Commission and is  incorporated  by reference.  This free Statement is available
upon request from the Fund: 800-368-2748.

THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES  COMMISSION,  NOR HAS THE FEDERAL OR
ANY STATE  SECURITIES  COMMISSION  PASSED ON THE  ACCURACY  OR  ADEQUACY OF THIS
PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

SHARES OF THE FUND ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK,  AND ARE NOT FEDERALLY  INSURED BY THE FDIC,  THE FEDERAL  RESERVE
BOARD,  OR ANY OTHER AGENCY.  WHEN  INVESTORS SELL SHARES OF THE FUND, THE VALUE
MAY BE HIGHER OR LOWER THAN THE AMOUNT ORIGINALLY PAID

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<TABLE>
<CAPTION>

FUND EXPENSES 

                                             Class A       Class C 
<S>                                          <C>           <C>   

A.  Shareholder Transaction Costs 
    Maximum Sales Charge on Purchases (as a  3.75%         None 
    percentage of offering price) 
    Contingent Deferred Sales Charge         None          None 
B.  Annual Fund Operating Expenses<F1>   
    Fiscal Year 1994 
    (as a percentage of net assets, net of  
    any applicable expense  
    reimbursement/fee waiver) 
    Management Fees                          0.70%         0.70% 
    Rule 12b-1 Service and Distribution Fees 
                                             0.25%         1.00% 
    Other Expenses                           0.31%         1.13% 
    Total Fund Operating Expenses            1.26%         2.83% 

<FN>
<F1>Expense  ratios for Class A shares have been  restated  to reflect  expenses
anticipated for fiscal year 1995.
</FN>
</TABLE>


C.  Example:  You  would  pay the  following  expenses  on a $1,000  investment,
assuming (1) 5% annual return and (2) redemption at the end of each period:

<TABLE>
<CAPTION>

                1 Year             3 Years             5 Years         10 Years                     
<S>              <C>                <C>                 <C>                <C>  
                                                                                   
Class A<F2>      $50                $76                 $104               $184                       
                                                                                   
Class C          $29                $88                 $149               $316

<FN>                       
<F2>Assumes payment of maximum initial sales charge at time of purchase. 
</FN>                  
</TABLE>


Explanation of Table: The purpose of the table is to assist you in understanding
the various  costs and expenses  that an investor in the Fund may bear  directly
(shareholder transaction costs) or indirectly (annual fund operating expenses).

A. Shareholder Transaction Costs are charges you pay when you buy or sell shares
of the Fund.  See "Reduced Sales Charges" at Exhibit A to see if you qualify for
possible  reductions  in the sales charge.  If you request a wire  redemption of
less than $1,000, you will be charged a $5 wire fee.

B.  Annual  Fund  Operating  Expenses.  Management  Fees are paid by the Fund to
Calvert Asset Management Company, Inc.  ("Investment  Advisor") for managing the
Fund's  investments  and business  affairs.  The Fund incurs Other  Expenses for
maintaining shareholder records,  furnishing shareholder statements and reports,
and  other  services.  Management  Fees and Other  Expenses  have  already  been
reflected in the Fund's share price and are not charged  directly to  individual
shareholder  accounts.  Please  refer to  "Management  of the Fund" for  further
information.

The Fund's Rule 12b-1 fees include an  asset-based  sales  charge.  Thus,  it is
possible  that  long-term  shareholders  in the Fund 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.

C.  Example of  Expenses.  The  example,  which is  hypothetical,  should not be
considered a  representation  of past or future  expenses.  Actual  expenses and
return may be higher or lower than those shown.

================================================================================
FINANCIAL HIGHLIGHTS 

The following  table  provides  information  about the financial  history of the
Fund's Class A and C shares.  They express the  information in terms of a single
share  outstanding  for the Fund  throughout  each  period.  The  table has been
audited by those  independent  accountants  whose  reports  are  included in the
Annual  Reports  to  Shareholders  of the  Fund.  The  table  should  be read in
conjunction  with the financial  statements and their related notes. The current
Annual Report to Shareholders is incorporated by reference into the Statement of
Additional Information.

<TABLE>
<CAPTION>
                                                  Class C Shares                     
                                                  From Inception (March 1, 1994)     
                                                  To September 30, 1994 
<S>                                                   <C>   

Net asset value, beginning of period                  $17.35                         

Income from investment operations 
Net investment income                                 .57                            
Net realized and unrealized gain (loss) on            (1.67)                         
investments 
Total from investment operations                      (1.10)                         

Distributions to shareholders 
Dividends from net investment income                  (.62)                          
Distribution from capital gains                       --                             
Total Distributions                                   (.62)                          

Total increase (decrease) in net asset value          (1.72)                         

Net asset value, end of period                        $15.63                         

Total return<F3>                                     (5.47)%                        

Ratio of expenses to average net assets               2.65%(a)                       

Ratio of net income to average net assets             5.62%(a)                       

Increase reflected in above net investment income     7.29%(a)                       
ratios due to expense reimbursement 
Portfolio turnover                                    34%                            

Net assets, end of period                             $413,187                       

Number of shares outstanding at end of period (in  
thousands)                                            26 

<FN>
<F3>Total return does not reflect deduction of Class A front-end sales charges. 
Total return prior to 1989 is not audited. 
(a) Annualized 
</FN>
</TABLE>


                            
================================================================================

<TABLE>
<CAPTION>

                                                  Class A Shares 
                                                  Year Ended September 30, 1994 
                                                
<S>                                                       <C>   

Net asset value, beginning of period                      $18.41 

Income from investment operations 
Net investment income                                     1.16 
Net realized and unrealized gain (loss) on                (2.42) 
investments 
Total from investment operations                          (1.26) 

Distributions to shareholders 
Dividends from net investment income                      (1.16) 
Distribution from capital gains                           (.31) 
Total Distributions                                       (1.47) 

Total increase (decrease) in net asset value              (2.73) 

Net asset value, end of period                            $15.68 

Total return<F3>                                         (6.94)% 

Ratio of expenses to average net assets                   1.07% 

Ratio of net income to average net assets                 6.86% 

Increase reflected in above net investment income          -- 
ratios due to expense reimbursement 
Portfolio turnover                                        34% 

Net assets, end of period                                 $45,935,905 

Number of shares outstanding at end of period (in
thousands)                                                2,929 

<FN>
<F3>Total return does not reflect deduction of Class A front-end sales charges. 
Total return prior to 1989 is not audited. 
(a) Annualized 
</FN>
</TABLE>



================================================================================
<TABLE>
<CAPTION>


Calvert Income Fund                                   Class A Shares 
                                                      Year Ended September 30, 
                                                      1993              1992 
                
<S>                                                   <C>               <C>

Net asset value, beginning of year                    $17.50            $16.61               

Income from investment operations 
Net investment income                                 1.23                1.28                 
Net realized and unrealized gain on investments       .91                  .89                  
Total from investment operations                      2.14                2.17                 

Distributions to shareholders 
Dividends from net investment income                  (1.23)             (1.28)               
Distribution from capital gains                       --                   --                   
Total Distributions                                   (1.23)             (1.28)               

Total increase in net asset value                     .91                  .89                  

Net asset value, end of year                          $18.41            $17.50               

Total return<F4>                                      12.47%            13.66%               

Ratio of expenses to average net assets               1.00%              1.04%                

Ratio of net income to average net assets             6.93%              7.59%                

Portfolio turnover                                    25%                  18%                  

Net assets, end of year                            $53,134,459     $43,494,326          

Number of shares outstanding at end of year (in       2,886              2,486                
thousands)

<FN>
<F4>Total return does not reflect deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited. 
</FN>
</TABLE>
 

================================================================================
<TABLE>
<CAPTION>


Calvert Income Fund                               Class A Shares
                                                  Year Ended September 30, 1991
<S>                                                   <C>   

Net asset value, beginning of year                    $15.58 

Income from investment operations 
Net investment income                                   1.31 
Net realized and unrealized gain on investments         1.03 
Total from investment operations                        2.34 

Distributions to shareholders 
Dividends from net investment income                   (1.31) 
Distribution from capital gains                          -- 
Total Distributions                                    (1.31) 

Total increase in net asset value                        1.03 

Net asset value, end of year                           $16.61 

Total return<F4>                                       15.72% 

Ratio of expenses to average net assets                 1.08% 

Ratio of net income to average net assets               8.22% 

Portfolio turnover                                        27% 

Net assets, end of year                             $36,412,545 

Number of shares outstanding at end of year (in         2,193 
thousands) 

<FN>
<F4>Total return does not reflect deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited. 
</FN>
</TABLE>
 
================================================================================

<TABLE>
<CAPTION>

Calvert Income Fund                                   Class A Shares 
                                                      Year Ended September 30, 
                                                      1990              1989 
<S>                                                   <C>                <C>    

New asset value, beginning of year                    $16.36            $15.70 

Income from investment operations 
Net investment income                                 1.36                1.36 
Net realized and unrealized gain (loss) on  
investments                                           (.78)                .71 
Total from investment operations                      .58                 2.07 

Distributions to shareholders 
Dividends from net investment income                  (1.36)             (1.41) 
Distribution from capital gains                       --                   -- 
Total Distributions                                   (1.36)             (1.41) 

Total increase (decrease) in net asset value          (.78)                .66 
Net asset value, end of year                          $15.58            $16.36 

Total return<F5>                                      3.63%             13.48% 

Ratio of expenses to average net assets               1.05%              1.07% 

Ratio of net income to average net assets             8.42%              8.57% 

Portfolio turnover                                    5%                   19% 

Net assets, end of year                           $32,201,363      $22,969,095 

Number of shares outstanding at end of year (in       2,066              1,404 
thousands) 

<FN>
<F5>Total return does not reflect deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited. 
</FN>
</TABLE>


================================================================================
<TABLE>
<CAPTION>

Calvert Income Fund                                   Class A Shares 
                                                      Year Ended September 30, 
                                                      1988               1987 
<S>                                                   <C>                <C>   

New asset value, beginning of year                    $15.29             $17.04 

Income from investment operations 
Net investment income                                 1.42                 1.51 
Net realized and unrealized gain (loss) on            .71                (1.61) 
investments 
Total from investment operations                      2.13                (.10) 

Distributions to shareholders 
Dividends from net investment income                  (1.42)             (1.47) 
Distribution from capital gains                       (.30)               (.18) 
Total Distributions                                   (1.72)             (1.65) 

Total increase (decrease) in net asset value          .41                (1.75) 

Net asset value, end of year                          $15.70             $15.29 

Total return<F6>                                      14.67%             (.84)%

Ratio of expenses to average net assets               .94%                 .85% 

Ratio of net income to average net assets             9.07%               9.06% 

Increase reflected in above net investment income     .25%                 .25% 
ratio due to expense reimbursement 

Portfolio turnover                                    37%                   42% 

Net assets, end of year                            $20,374,751      $20,573,546 

Number of shares outstanding at end of year (in  
thousands)                                            1,298               1,345 

<FN>
<F6>Total return does not reflect deduction of Class A front-end sales charges.  
Total return prior to 1989 is not audited. 
</FN>
</TABLE>


================================================================================
<TABLE>
<CAPTION>

Calvert Income Fund                                   Class A Shares 
                                                      Year Ended September 30, 
                                                      1986                1985 
<S>                                                   <C>               <C>    

New asset value, beginning of year                    $15.78            $14.30 
  
Income from investment operations 
Net investment income                                 1.57                1.72 
Net realized and unrealized gain (loss) on            1.26                1.53 
investments 
Total from investment operations                      2.83                3.25 

Distributions to shareholders 
Dividends from net investment income                  (1.57)             (1.77) 
Distribution from capital gains                       --                   -- 
Total Distributions                                   (1.57)             (1.77) 

Total increase (decrease) in net asset value          1.26                 1.48 

Net asset value, end of year                          $17.04             $15.78 

Total return<F7>                                      18.38%             23.31% 

Ratio of expenses to average net assets               .85%                 .82% 

Ratio of net income to average net assets             9.16%              10.74% 

Increase reflected in above net investment income     .33%                 .61% 
ratio due to expense reimbursement 

Portfolio turnover                                    23%                   11% 

Net assets, end of year                            $21,455,859      $13,428,901 

Number of shares outstanding at end of year (in       1,259                 851 
thousands) 

<FN>
<F7>Total return does not reflect deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
</FN>
</TABLE>

================================================================================

INVESTMENT OBJECTIVE AND POLICIES 

Calvert  Income Fund  invests in a variety of  fixed-income  securities,  65% of
which must be of investment grade quality.

Calvert Income Fund seeks to maximize long-term income, to the extent consistent
with  prudent  investment  management  and  preservation  of capital,  primarily
through  investment  in  investment  grade  bonds  and  other   income-producing
securities.  The  Fund is  nondiversified.  Debt  securities  may be  long-term,
intermediate-term,  short-term,  or any  combination  thereof,  depending on the
Advisor's evaluation of current and anticipated market patterns and trends.

Calvert Income Fund invests 80% of its assets in corporate obligations and other
fixed-income  securities.  At least 65% of its assets at the date of  investment
are rated  within the four  highest  grades  established  by  Moody's  Investors
Services, Inc. (Aaa, Aa, A, or Baa), or by Standard and Poor's Corporation (AAA,
AA, A, or BBB), or if not rated, are of comparable  quality as determined by the
Advisor. Though still investment grade, securities rated BBB/Baa possess certain
speculative  elements and are  generally  more  susceptible  to changing  market
conditions. All fixed income instruments are subject to interest-rate risk; that
is, when market interest rates rise, the current  principal value of a bond will
decline.

The  remaining  35% of the  Fund's  total  assets  may  consist  of  other  debt
securities (see below)  including bonds rated below BBB or Baa  ("non-investment
grade  securities,"  commonly  known as "junk  bonds").  With lower rated bonds,
there is a greater possibility that an adverse change in the financial condition
of the issuer may affect its ability to pay principal and interest. In addition,
to the extent the Fund holds any such bonds,  it may be  negatively  affected by
adverse economic developments,  increased volatility or a lack of liquidity. See
the Statement of Additional Information, "Non-Investment Grade Debt Securities,"
and bond ratings.

Calvert  Income Fund may also  purchase  obligations  issued or guaranteed as to
principal  by  the  U.S.  Government  or  its  agencies  or   instrumentalities;
certificates of deposit,  time deposits,  and bankers' acceptances of U.S. banks
and their branches  located outside of the U.S. and of U.S.  branches of foreign
banks,  provided that the bank has total assets of at least one billion  dollars
or the  equivalent in other  currencies;  commercial  paper which at the date of
investment  is rated  Prime-2 or better by Moody's,  A-2 or better by Standard &
Poor's, or, if not rated, is of comparable quality as determined by the Advisor;
and any of the above securities subject to repurchase agreements with recognized
securities  dealers and banks. Up to 20% of the value of the Fund's total assets
may consist of other debt securities (including  securities  convertible into or
carrying  warrants to purchase  common  stock or other  equity  securities)  and
income-producing preferred and common stocks.

GNMA Certificates 

GNMA  Certificates,   or  GNMAs,  are  mortgage-backed  securities  representing
ownership of mortgage or  construction  loans that are issued by lenders such as
mortgage  bankers,  commercial  banks and savings and loan  associations and are
either  insured by the  Federal  Housing  Administration  or  guaranteed  by the
Veterans Housing  Administration.  The GNMA may be secured by a single mortgage,
such as a large  multi-family  housing  development,  or, more  typically,  by a
"pool" or group of single-family housing mortgages.

Once  approved by GNMA,  the timely  payment of interest  and  principal on each
mortgage  is  guaranteed  by GNMA and backed by the full faith and credit of the
U.S. Government.  GNMAs differ from bonds in that principal is paid back monthly
by the borrower  over the term of the loan rather than returned in a lump sum at
maturity.  GNMAs are called "pass-through"  securities because both interest and
principal payments  (including  prepayments) are passed through to the holder of
the GNMA.  Upon  receipt,  principal  payments will be reinvested by the Fund in
additional  securities at the then  prevailing  interest rate. The amount of any
premium that may be paid upon purchase of a GNMA is not guaranteed.  The Advisor
will attempt, through careful evaluation of available GNMA issues and prevailing
market conditions, to invest in GNMAs which provide a high income return but are
not subject to substantial risk of loss of principal.  Accordingly,  the Advisor
may forgo the  opportunity  to invest in  certain  issues of GNMAs  which  would
provide a high  current  income yield if the Advisor  believes  that such issues
would be subject to a risk of prepayment or loss of principal over the long-term
that would outweigh the short-term increment in yield.

Collateralized Mortgage Obligations 

Collateralized  mortgage  obligations  ("CMOs")  are bonds which are the general
obligations  of the bond issuer.  CMOs may be issued by  governmental  entities,
such  as  the  Federal  Home  Loan   Mortgage   Corporation   (FHLMC),   and  by
non-governmental  entities,  such as banks  and  other  mortgage  lenders.  CMOs
generally are secured by collateral consisting of individual mortgages or a pool
of mortgages. CMOs are not direct obligations of the Government.

FNMA and FHLMC Certificates 

Each Fund may invest in pass-through certificates issued by the Federal National
Mortgage  Association  ("FNMA")  and  Federal  Home  Loan  Mortgage  Corporation
("FHLMC").  Unlike GNMAs,  which are  typically  interests in pools of mortgages
insured  or  guaranteed  by  government  agencies,  FNMA and FHLMC  certificates
represent undivided interests in pools of conventional mortgage loans.

Nondiversified 

There may be risks associated with the Fund being nondiversified. Specificially,
since a relatively  high percentage of the assets of the Fund may be invested in
the  obligations of a limited number of issuers,  the value of the shares of the
Fund may be more  susceptible  to any single  economic,  political or regulatory
event than the shares of a diversified fund would be.

Financial Futures, Options, and Other Investment Techniques 

The Fund can use various  techniques  to increase  or decrease  its  exposure to
changing  security  prices,  interest  rates,  currency  exchange 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 currency exchange contracts,  or swap agreements,
and purchasing  indexed  securities.  The Fund can use these practices either as
substitution or as protection against an adverse move in the Fund's portfolio to
adjust  the risk and return  characteristics  of the  Fund's  portfolio.  If the
Advisor judges market conditions incorrectly or employs a strategy that does not
correlate  well  with the  Fund'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 the Fund and may involve a
small  investment of cash  relative to the  magnitude of the risk  assumed.  Any
instruments  determined to be illiquid are subject to the Fund's 15% restriction
on illiquid  securities.  See the Statement of Additional  Information  for more
detail about these strategies.

The Fund may enter into repurchase  agreements and may purchase  securities on a
forward or when-issued basis.

In a  repurchase  agreement,  the Fund buys a security  subject to the right and
obligation to sell it back at a higher price.  These  transactions must be fully
secured at all times, but they involve some credit risk to the Fund if the other
party  defaults  on its  obligation  and the Fund is delayed or  prevented  from
liquidating the collateral.

Purchasing  obligations  for future  delivery  or on a  "when-issued"  basis may
increase the Fund's overall  investment  exposure and involves a risk of loss if
the  value  of the  securities  declines  prior  to  the  settlement  date.  The
transactions are fully secured at all times.

Foreign Investments 

The Fund may invest up to 20% of its assets in  securities  of foreign  issuers,
and hedge its foreign securities  holdings against  anticipated adverse moves in
foreign  currency  exchange  rates.  The Fund  may use  either  the spot  (cash)
markets,   forward   contracts,   or  currency  financial  futures  and  options
transactions.  It is impossible to forecast with precision the foreign  currency
values,  and the Fund could incur a loss on such  currency  transactions  if the
market moves against the position it has taken.  Securities  of foreign  issuers
may  offer  greater  potential  for  capital  appreciation  or  income  than the
securities of domestic issuers and may involve investment risks that are greater
than those  inherent in the  securities of domestic  issuers.  Such  differences
might  possibly  result  from  future   political  and  economic   developments,
disparities  in  economic  systems,   and  imposition  of  foreign  governmental
restrictions.  There may also be less  publicly  available  information  about a
foreign issuer than about a domestic  issuer;  foreign issuers are not generally
subject to uniform auditing, accounting and reporting requirements comparable to
those applicable to domestic issuers.

Other Policies 

The Fund may borrow money from banks as a temporary measure for extraordinary or
emergency  purposes.  An explanation of this and the policies below is set forth
in the Statement of Additional Information.

The Fund may lend its portfolio securities to member firms of the New York Stock
Exchange and commercial banks with assets of $1 billion or more, but only if the
value of the  securities  loaned  from a Fund will not exceed  one-third  of the
Fund's assets.

The Fund has  adopted  certain  fundamental  investment  restrictions  which are
discussed  in  detail  in  the  Statement  of  Additional  Information.   Unless
specifically   noted   otherwise,   the  investment   objective,   policies  and
restrictions  of the  Fund  are  fundamental  and  may  not be  changed  without
shareholder approval.

Although  U.S.  Government-backed  obligations  in the Fund's  portfolio  may be
guaranteed by the Government, the Fund's net asset value per share and yield are
not guaranteed and will change in response to market conditions. There can be no
assurance that the Fund will be successful in meeting its investment objective.

YIELD AND TOTAL RETURN 

The Fund may advertise yield and total return for each class. 

Yield measures the current  investment  performance  for each class of the Fund,
that is, the rate of income on its  portfolio  investments  divided by the share
price.  Yield  is  computed  by  annualizing  the  result  of  dividing  the net
investment  income per share over a 30-day period by the maximum  offering price
per share on the last day of that  period.  Yields are  calculated  according to
accounting methods that are standardized for all stock and bond funds.

Both yield and total return are based on historical results and are not intended
to indicate future performance.

Total return is calculated  separately for each class.  It includes not only the
effect of income  dividends but also any change in net asset value, or principal
amount,  during the stated period. The total return of a class shows its overall
change in value, including changes in share price and assuming all of the class'
dividends and capital gain  distributions  are  reinvested.  A cumulative  total
return reflects the class'  performance over a stated period of time. An average
annual total return  reflects the  hypothetical  annual  compounded  return that
would have produced the same cumulative total return if the performance had been
constant over the entire period.  Because  average annual returns tend to smooth
out variations in the returns,  you should  recognize that they are not the same
as actual year-by-year  results. Both types of total return usually will include
the effect of paying the front-end sales charge,  in the case of Class A shares.
Of course,  total  returns  will be higher if sales  charges  are not taken into
account.  Quotations of "overall  return" do not reflect  deduction of the sales
charge.  You should  consider  overall  return figures only if you qualify for a
reduced sales  charge,  or for purposes of comparison  with  comparable  figures
which also do not reflect sales charges,  such as mutual fund averages  compiled
by Lipper  Analytical  Services,  Inc.  Further  information  about  the  Fund's
performance  is contained  in its Annual  Report to  Shareholders,  which may be
obtained without charge.

MANAGEMENT OF THE FUND 

The Trust's Board of Trustees  supervises the Trust's activities and reviews its
contracts with companies that provide it with services.

Calvert Income Fund is a series of The Calvert Fund (the  "Trust"),  an open-end
management  investment  company  organized as a Massachusetts  business trust on
March 15, 1982. The other series of the Fund are Calvert  Strategic  Growth Fund
and Calvert U.S. Government Fund.

The Trust 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 of the Fund you own. Matters  affecting  classes
differently,  such as  Distribution  Plans,  will be voted on  separately by the
affected class(es).

Portfolio Managers 

Investment  selections for the Fund are made by Colleen M. Denzler,  C.F.A., and
Stephen N. Van Order.  Ms.  Denzler has been with the Calvert  Group since 1986,
and has been a member of the Portfolio Investment Department since January 1987.
She is a  member  of the  Institute  of  Chartered  Financial  Analysts  and the
Washington Society of Investment Analysts. Mr. Van Order joined Calvert Group in
October  1992 as the  head of the  trading  desk.  He  oversees  the  day-to-day
investments and operations of the department and  participates in setting market
and  portfolio  strategy.  Previously,  Mr. Van Order was  Director of Long Term
Funding at Federal  National  Mortgage  Association  (Fannie Mae). In his former
capacity,  Mr. Van Order was  responsible  for Fannie Mae's long term  borrowing
programs,  hedging  programs and debt marketing  program.  Both have managed the
Fund since early 1995.

Calvert  Group  is  one  of  the  largest  investment  management  firms  in the
Washington, D.C. area.

Calvert Group,  Ltd., parent of the Fund's investment  advisor,  transfer agent,
and  distributor,  is a subsidiary  of Acacia Mutual Life  Insurance  Company of
Washington, D.C. Calvert Group is one of the largest investment management firms
in the  Washington,  D.C. area.  Calvert Group,  Ltd. and its  subsidiaries  are
located at 4550 Montgomery Avenue, Suite 1000N, Bethesda,  Maryland 20814. As of
December 31, 1994,  Calvert Group managed and  administered  assets in excess of
$4.2 billion and more than 200,000 shareholder and depositor accounts.

Calvert Asset Management serves as Advisor to the Fund. 

Calvert Asset Management Company,  Inc. (the "Advisor") is the Fund's investment
advisor.  The  Advisor  provides  the  Fund  with  investment   supervision  and
management;  administrative  services and office space;  furnishes executive and
other  personnel to the Fund; and pays the salaries and fees of all Trustees who
are  affiliated  persons of the  Advisor.  The  Advisor  may also assume and pay
certain advertising and promotional  expenses of the Fund and reserves the right
to compensate  broker-dealers  in return for their promotional or administrative
services.  The  Advisor  has  agreed to limit the  Fund's  expenses  to the most
restrictive state limitation in effect.

The Advisor receives a fee based on a percentage of the Fund's assets. 

For its services  during the fiscal year ended  September 30, 1994,  the Advisor
was  entitled  pursuant  to the  Investment  Advisory  Agreement,  to receive an
investment  advisory  fee of 0.70% of the Fund's  respective  average  daily net
assets.

Calvert Distributors, Inc. serves as underwriter to market the Fund's shares. 

Calvert  Distributors,  Inc.  ("CDI") is the Fund's  principal  underwriter  and
distributor.  Under the terms of its  underwriting  agreement with the Fund, CDI
markets and  distributes  the Fund's  shares and is  responsible  for payment of
commissions and service fees to  broker-dealers,  banks, and financial  services
firms, preparation of advertising and sales literature, and printing and mailing
of prospectuses to prospective investors.

The transfer agent keeps your account records. 

Calvert Shareholder Services,  Inc. is the Fund's transfer,  dividend disbursing
and shareholder servicing agent.

SHAREHOLDER GUIDE 

Opening An Account 

You can buy shares of the Fund in several ways which are  described  here and in
the chart below.

An account  application  accompanies  this  prospectus.  A completed  and signed
application is required for each new account you open,  regardless of the method
you choose for making your initial investment.  Additional forms may be required
from  corporations,  associations,  and  certain  fiduciaries.  If you  have any
questions  or need extra  applications,  call your broker,  or Calvert  Group at
800-368-2748. Be sure to specify which class you wish to purchase.

To invest in any of Calvert's tax-deferred retirement plans, please call Calvert
Group  at  800-368-2748  to  receive   information  and  the  required  separate
application.

Alternative Sales Options 

The Fund offers two classes of shares: 

Class A Shares - Front End Load Option 

Class A shares are sold with a front-end  sales  charge at the time of purchase.
Class A shares are not subject to a sales charge when they are redeemed.

Class C shares - Level Load Option 

Class C shares  are sold  without  a sales  charge  at the time of  purchase  or
redemption.

Class C shares have higher expenses 

The Fund bears some of the costs of selling its shares under  Distribution Plans
adopted  with  respect to its Class A and Class C shares  pursuant to Rule 12b-1
under the 1940 Act.  Payments under the Class A Distribution Plan are limited to
a maximum of 0.50% annually of the average daily net asset value of Class A. The
Class C Distribution Plan provides for the payment of an annual distribution fee
to CDI of up to 0.75%,  plus a service fee of up to 0.25%,  for a total of 1.00%
of the  average  daily net  assets  attributable  to their  respective  classes.

Considerations for deciding which class of shares to buy

Income  distributions  for Class A shares will probably be higher than those for
Class C shares, as a result of the distribution  expenses  described above. (See
also "Total  Return.") You should  consider  Class A shares if you qualify for a
reduced sales charge under Class A or if you plan to hold the shares for several
years.

Class A Shares 

Class A shares are offered at net asset value plus a front-end  sales  charge as
follows:

                                                                 Concession to
                                                  As a % of Net  Dealers as a %
                                   As a % of     Amount Invested   of Amount  
Amount of Investment              Offering Price                   Invested 

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
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%         0.25%* 


*For new  investments  (new purchases but not exchanges) of $1 million or more a
broker-dealer will have the choice of being paid a finder's fee by CDI in one of
the following methods:  (1) CDI may pay a broker-dealer,  on a monthly basis for
12 months, an annual rate of 0.30%. Payments will be made monthly at the rate of
0.025% of the amount of the investment,  less redemptions;  or (2) CDI may pay a
broker-dealer  0.25% of the amount of the  purchase;  however,  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 Fund within  thirteen  months of the
time of purchase.

Sales charges on Class A shares may be reduced or  eliminated in certain  cases.
See Exhibit A to this prospectus.

The sales charge is paid to CDI,  which in turn  normally  reallows a portion to
your  broker-dealer.  Upon  written  notice to  dealers  with whom it has dealer
agreements,  CDI may reallow up to the full applicable sales charge.  Dealers to
whom 90% or more of the entire  sales  charge is  reallowed  may be deemed to be
underwriters under the Securities Act of 1933.

In addition to any sales charge reallowance or finder's fee, your broker-dealer,
or other  financial  service firm through which your account is held,  currently
will be paid  periodic  service  fees at an  annual  rate of up to  0.25% of the
average  daily net asset value of Class A shares held in accounts  maintained by
that firm.

Class A Distribution Plan 

The Fund has adopted a Distribution Plan with respect to its Class A shares (the
"Class A  Distribution  Plan"),  which provides for payments at a maximum annual
rate of 0.50% of the average  daily net asset value of the Fund's Class A shares
to pay expenses associated with the distribution and servicing.  Amounts paid by
the Fund to CDI under the Class A  Distribution  Plan are used to pay to dealers
and others, including CDI salespersons who service accounts,  service fees at an
annual  rate of up to 0.25% of the  average  daily  net  asset  value of Class A
shares, and to pay CDI for its marketing and distribution  expenses,  including,
but not limited to,  preparation  of  advertising  and sales  literature and the
printing and mailing of prospectuses to prospective investors. During the fiscal
year ended September 30, 1994,  Class A Distribution  Plan expenses for the Fund
were 0.06%.

Each of the  Distribution  Plans  may be  terminated  at any time by vote of the
Independent  Trustees or by vote of a majority of the outstanding  voting shares
of the respective class.

Class C Shares 

Class C shares are not available through all dealers. Class C shares are offered
at net asset value,  without a front-end  sales charge or a contingent  deferred
sales charge. Class C expenses are higher than those of Class A.

Class C Distribution Plan 

The Fund has adopted a Distribution Plan with respect to its Class C shares (the
"Class C Distribution  Plan"),  which provides for payments at an annual rate of
up to 1.00% of the  average  daily  net asset  value of Class C  shares,  to pay
expenses of the  distribution  and servicing of Class C shares.  Amounts paid by
the Fund under the Class C  Distribution  Plan are currently  used by CDI to pay
dealers and other selling firms  quarterly  compensation at an annual rate of up
to 0.75%,  plus a service  fee, as described  above under "Class A  Distribution
Plan," of up to 0.25%,  of the average  daily net asset value of each share sold
by  such  others.  For  the  fiscal  year  ended  September  30,  1994,  Class C
Distribution Plan expenses were 1.00% for the Fund.

Arrangements with Broker-Dealers and Others 

CDI  may  also  pay  additional  concessions,   including  non-cash  promotional
incentives,  such as  merchandise  or trips,  to  dealers  employing  registered
representatives who have sold or are expected to sell a minimum dollar amount of
shares of the Fund and/or  shares of other Funds  underwritten  by CDI.  CDI may
make  expense  reimbursements  for  special  training  of a dealer's  registered
representatives,  advertising  or equipment,  or to defray the expenses of sales
contests.  Eligible marketing and distribution  expenses may be paid pursuant to
the Fund's Rule 12b-1 Distribution Plan.

Dealers or others may receive  different  levels of  compensation  depending  on
which class of shares they sell.  Payments  pursuant to a Distribution  Plan are
included in the operating expenses of the class.

HOW TO BUY SHARES 
(BE SURE TO SPECIFY WHICH CLASS YOU ARE BUYING) 

Method           New Accounts                     Additional Investments 

By Mail          $2,000 minimum                   $250 minimum 

                 Please make your check           Please make your check  
                 payable to the Fund and          payable to the Fund and 
                 mail it with your                mail it with your 
                 application to:                  investment slip to:

                 Calvert Group                    Calvert Group 
                 P.O. Box 419544                  P.O. Box 419739 
                 Kansas City, MO 64179-6542       Kansas City, MO 64105-6739 

By Registered, Certified, or Overnight Mail:Calvert Group 
                                                  c/o NFDS, 6th Floor 
                                                  104 Baltimore 
                                                  Kansas City, MO 64105-1807 

Through Your Broker            $2,000 minimum         $250 minimum 

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

FOR ALL OPTIONS BELOW, PLEASE CALL YOUR BROKER, OR CALVERT GROUP AT 800-368-2745

By Exchange                    $2,000 minimum         $250 minimum 
(From your account in another Calvert Group Fund) 

When opening an account by exchange,  your new account must be established  with
the same name(s),  address and taxpayer  identification  number as your existing
Calvert account.

By Bank Wire                   $2,000 minimum         $250 minimum 

By Calvert Money               Not Available for      $50 minimum 
Controller*                    Initial Investment 

*Please allow  sufficient time for Calvert Group to process your initial request
for this service,  normally 10 business days. The maximum  transaction amount is
$300,000, and your purchase request must be received by 4:00 p.m. Eastern time.

NET ASSET VALUE 

Net asset  value  per share  ("NAV)"  refers to the worth of one  share.  NAV is
computed  by adding the value of all  portfolio  holdings,  plus  other  assets,
deducting  liabilities  and then  dividing  the  result by the  number of shares
outstanding.  The NAVs of each class will vary daily based on the market  values
of the Fund's investments.

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

The NAV for the Fund is  calculated  at the close of the  Fund's  business  day,
which  coincides  with the closing of the regular  session of the New York Stock
Exchange  (normally 4:00 p.m.  Eastern time). The Fund is open for business each
day the New York Stock  Exchange is open.  All  purchases of Fund shares will be
confirmed and credited to your account in full and fractional shares (rounded to
the nearest 1/1000 of a share).

WHEN YOUR ACCOUNT WILL BE CREDITED 

Before you buy shares,  please read the following  information to make sure your
investment is accepted and credited properly.

Your purchase will be processed at the next offering price based on the next net
asset  value  calculated  after your order is  received  and  accepted.  If your
purchase is received by 4:00 p.m. Eastern time, your account will be credited on
the day of receipt.  If your purchase is received after 4:00 p.m.  Eastern time,
it will be credited the next business  day. All  purchases  must be made in U.S.
dollars and checks must be drawn on U.S.  banks.  No cash 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.  If your check does not clear,  your
purchase will be cancelled and you will be charged a $10 fee plus costs incurred
by the Fund.  When you purchase by check or with Calvert Money  Controller,  the
Fund can hold payment on redemptions  until it is reasonably  satisfied that the
investment is collected  (normally 10 business  days).  To avoid this collection
period, you can wire federal funds from your bank, which may charge you a fee.

Certain financial institutions or broker-dealers which have entered into a sales
agreement with the Distributor may enter confirmed  purchase orders on behalf of
customers by phone,  with payment to follow within a number of days of the order
as specified by the program.  If payment is not received in the time  specified,
the financial institution could be held liable for resulting fees or losses.

EXCHANGES 

You may exchange shares of the Fund for shares of other Calvert Group Funds. 

If your investment goals change, the Calvert Group Family of Funds has a variety
of investment  alternatives  that includes  common stock funds,  tax-exempt  and
corporate  bond funds,  and money  market  funds.  The  exchange  privilege is a
convenient way to buy shares in other Calvert Group Funds in order to respond to
changes  in your  goals or in market  conditions.  However,  to protect a Fund's
performance and to minimize costs,  Calvert Group discourages frequent exchanges
and may prohibit  additional  purchases of Fund shares by persons engaged in too
many  short-term  trades.  Before you make an exchange from a Fund or Portfolio,
please note the following:

Call your broker or a Calvert  representative  for  information and a prospectus
for any of Calvert's other Funds  registered in your state.  Read the prospectus
of the  Fund  or  Portfolio  into  which  you  want  to  exchange  for  relevant
information, including class offerings.

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 on the
transaction.

Complete  and sign an  application  for an  account  in that Fund or  Portfolio,
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.

Shares on which you have already paid a sales charge at Calvert Group and shares
acquired by  reinvestment  of dividends or  distributions  may be exchanged into
another Fund at no additional charge.

Shareholders (and those managing  multiple  accounts) who make two purchases and
two  exchange  redemptions  of shares of the same  Portfolio  during any 6-month
period  will be given  written  notice that they may be  prohibited  from making
additional  investments.  This  policy  does not  prohibit  a  shareholder  from
redeeming  shares of the Fund,  and does not apply to trades  solely among money
market funds.

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

OTHER CALVERT GROUP SERVICES 

Calvert Information Network 

24 hour yield and prices  

Calvert  Group  has a  round-the-clock  telephone  service  that  lets  existing
customers  use a push button phone to obtain  prices,  performance  information,
account balances, and authorize certain transactions.

Calvert Money Controller 

Calvert Money Controller  eliminates the delay of mailing a check or the expense
of wiring funds. You can request this free service on your application.

This service allows you to authorize  electronic  transfers of money to purchase
or sell shares.  You use Calvert Money Controller like an "electronic  check" to
move money ($50 to $300,000)  between  your bank account and your Calvert  Group
account with one phone call.  Allow one or two business  days after the call for
the  transfer to take place;  for money  recently  invested,  allow normal check
clearing time (up to 10 business  days) before  redemption  proceeds are sent to
your bank.

You may also arrange systematic monthly or quarterly  investments  (minimum $50)
into your Calvert Group account.  After you give us proper  authorization,  your
bank account will be debited to purchase Fund shares.  A debit entry will appear
on your bank statement.  Share  purchases made through Calvert Money  Controller
will be  subject  to the  applicable  sales  charge.  If you would  like to make
arrangements for systematic  monthly or quarterly  redemptions from your Calvert
Group  account,  call  your  broker  or  Calvert  Group  for a Money  Controller
Application.

Telephone Transactions 

Calvert may record all telephone calls. 

If you have  telephone  transaction  privileges,  you may purchase,  redeem,  or
exchange shares,  wire funds and use Calvert Money Controller by telephone.  You
automatically  have telephone  privileges unless you elect otherwise.  The Fund,
the transfer agent and their  affiliates are not liable for acting in good faith
on  telephone  instructions  relating  to your  account,  so long as they follow
reasonable procedures to determine that the telephone  instructions are genuine.
Such  procedures  may include  recording the telephone  calls and requiring some
form of personal  identification.  You should  verify the  accuracy of telephone
transactions immediately upon receipt of your confirmation statement.

Optional Services 

Complete  the  "Option"  sections  of the  application  for the  easiest  way to
establish services.

The easiest way to establish  optional services on your Calvert Group account is
to select the options you desire when you complete your account application.  If
you wish to add other options later,  you may have to provide us with additional
information and a signature guarantee. Please call Calvert Investor Relations at
800-368-2745 for further assistance. For our mutual protection, we may require a
signature  guarantee  on  certain  written  transaction  requests.  A  signature
guarantee verifies the authenticity of your signature,  and may be obtained from
any  bank,   savings  and  loan  association,   credit  union,   trust  company,
broker-dealer firm or member of a domestic stock exchange. A signature guarantee
cannot be provided by a notary public.

Householding of General Mailings 

Householding   reduces  Fund   expenses  and  saves  paper  and  trees  for  the
environment.

If you have multiple accounts with Calvert, you may receive combined mailings of
some  shareholder  information,  such as semi-annual and annual reports.  Please
contact Calvert Investor  Relations at 800-368-2745 to receive additional copies
of information.

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  research  fee for  these  special
services.

If you are purchasing  shares of the Fund through a program of services  offered
by a  broker-dealer  or  financial  institution,  you  should  read the  program
materials in conjunction with this Prospectus.  Certain features may be modified
in  these  programs,   and   administrative   charges  may  be  imposed  by  the
broker-dealer or financial institution for the services rendered.

Tax-Saving Retirement Plans 

Contact Calvert Group for complete  information  kits discussing the plans,  and
their benefits, provisions and fees.

Calvert  Group can set up your new  account  under one of  several  tax-deferred
plans.  These plans let you invest for  retirement  and shelter your  investment
income from current taxes. Minimums may differ from those listed in the chart on
page _____.  Also,  reduced  sales  charges may apply.  See "Exhibit A - Reduced
Sales Charges."

Individual  retirement  accounts  (IRAs):  available  to anyone  who has  earned
income.  You may also be able to make investments in the name of your spouse, if
your spouse has no earned income.

Qualified  Profit-Sharing  and  Money-Purchase  Plans (including  401(k) Plans):
available to  self-employed  people and their partners,  or to corporations  and
their employees.

Simplified  Employee Pension Plan (SEP-IRA):  available to self-employed  people
and their partners, or to corporations.  Salary reduction pension plans (SAR-SEP
IRAs) are also available to employers with 25 or fewer employees.

403(b)(7)  Custodial  Accounts:   available  to  employees  of  most  non-profit
organizations and public schools and universities.

SELLING YOUR SHARES 

You may redeem all or a portion of your shares on any business  day. Your shares
will be redeemed at the next net asset value  calculated  after your  redemption
request is received and accepted.  See the chart below for specific requirements
necessary to make sure your redemption request is acceptable.  Remember that the
Fund may hold payment on the  redemption  of your shares until it is  reasonably
satisfied that  investments  made by check or by Calvert Money  Controller  have
been collected (normally up to 10 business days).

Redemption Requirements To Remember 

To ensure  acceptance of your redemption  request,  please follow the procedures
described here and below.

Once your shares are redeemed,  the proceeds will normally be sent to you on the
next business day, but if making  immediate  payment could adversely  affect the
Fund,  it may take up to seven (7) days.  Calvert Money  Controller  redemptions
generally will be credited to your bank account on the first or second  business
day after your phone call.  When the New York Stock  Exchange 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.

Minimum account balance is $1,000. 

Please maintain a balance in your account of at least $1,000, per class. If, due
to redemptions,  the account falls below $1,000,  or you fail to invest at least
$1,000, your account may be closed and the proceeds mailed to you at the address
of record.  You will be given  notice that your  account will be closed after 30
days unless you make an additional  investment to increase your account  balance
to the $1,000 minimum.

HOW TO SELL YOUR SHARES 

By Mail To: 
Calvert Group 
P.O. Box 419544 
Kansas City, MO  
64179-6544 

You may  redeem  available  shares  from your  account  at any time by sending a
letter of instruction,  including your name, account and Fund number, the number
of shares or dollar amount, and where you want the money to be sent.  Additional
requirements,  below, may apply to your account.  The letter of instruction must
be signed by all required  authorized signers. If you want the money to be wired
to a bank not previously  authorized,  then a voided bank check must be enclosed
with your  letter.  If you do not have a voided check or if you would like funds
sent to a different  address or another  person,  your letter must be  signature
guaranteed.

Type of 
Registration                                         Requirements 

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

Trusts                        Letter of instruction signed by the Trustee(s)  
                              (as Trustee), with a signature guarantee. (If the
                              Trustee's name is notregistered on your account,
                              provide a copy of the trust document, certified 
                              within the last 60 days.) 
By Telephone 

Please call  800-368-2745.  You may redeem shares from your account by telephone
and have your money  mailed to your  address of record or wired to an address or
bank you have previously authorized. A charge of $5 is imposed on wire transfers
of less than $1,000. See "Telephone Transactions" on page ___.

Calvert Money Controller 

Please allow  sufficient  time for Calvert Group to process your initial request
for this service  (normally 10 business days). You may also authorize  automatic
fixed amount  redemptions  by Calvert  Money  Controller.  All requests  must be
received by 4:00 p.m. (Eastern time). Accounts cannot be closed by this service.

Exchange to Another Calvert Group Fund 

You must meet the minimum investment requirement of the other Calvert Group Fund
or Portfolio.  You can only exchange  between  accounts  with  identical  names,
addresses and taxpayer  identification number, unless previously authorized with
a signature-guaranteed letter.

Systematic Check Redemptions 

If you maintain an account with a balance of $10,000 or more, you may have up to
two (2) regular  checks for a fixed amount sent to you on the 15th of each month
simply by sending a letter  with all the  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.

Through your Broker 

If your  account  is held in your  broker's  name  ("street  name"),  you should
contact your broker directly to transfer, exchange or redeem shares.

DIVIDENDS, CAPITAL GAINS AND TAXES 

Each year, the Fund distributes  substantially  all of its net investment income
and capital gains to shareholders.

Dividends  from the Fund's net  investment  income  are  declared  and paid on a
monthly  basis.  Net  investment  income  consists of the interest  income,  net
short-term   capital  gains,  if  any,  and  dividends   declared  and  paid  on
investments,  less expenses.  Distributions of the Fund's net short-term capital
gains  (treated as dividends for tax  purposes)  and its net  long-term  capital
gains, if any, are normally declared and paid by the Fund 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  and
distribution payments will vary between classes; dividend payments are generally
anticipated to be higher for Class A shares.

Dividend and Distribution Payment Options. 

Dividends  and  any  distributions  are  automatically  reinvested  in the  same
Portfolio  at net asset  value (no sales  charge),  unless you elect to have the
dividends of $10 or more paid in cash (by check or by Calvert Money Controller).
Dividends and  distributions  may be  automatically  invested in an  identically
registered  account with the same account number in any other Calvert Group Fund
at net asset value.  If reinvested in the same Fund account,  new shares will be
purchased at net asset value on the reinvestment date, which is generally 1 to 3
days prior to the payment date. You must notify the Fund in writing prior to the
record  date to change  your  payment  options.  If you elect to have  dividends
and/or  distributions  paid in cash, and the U.S.  Postal Service cannot deliver
the  check,  or if it remains  uncashed  for six  months,  it, as well as future
dividends and distributions, will be reinvested in additional shares.

"Buying a Dividend" 

At the time of purchase,  the share price of the Fund 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,  the Fund's  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 

In  January,  the Fund will mail you Form  1099-DIV  indicating  the federal tax
status of  dividends  and  capital  gain  distributions  paid to you by the Fund
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 three  months  prior  are  taxable  in the year  declared.
Dividends and  distributions  are taxable to you  regardless of whether they are
taken in cash or reinvested.  Dividends, including short-term capital gains, are
taxable as ordinary  income.  Distributions  from  long-term  capital  gains are
taxable as long-term  capital gains,  regardless of how long you have owned Fund
shares.

You may realize a capital gain or loss when you sell or exchange shares. 

If you sell or  exchange  your Fund  shares  you will have a short or  long-term
capital  gain or loss,  depending  on how long you owned the  shares  which were
sold. In January,  the Fund will mail you Form 1099-B indicating the date of and
proceeds  from 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 

In addition to federal taxes, you may be subject to state or local taxes on your
investment,  depending  on the laws in your area.  You will be  notified  to the
extent, if any, that dividends  reflect interest  received from U.S.  government
securities.  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 the
Fund to withhold 31% of your dividends and certain redemptions. In addition, you
may be subject  to a fine.  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 at the current
NAV on the date of  redemption.  The Fund  reserves  the right to reject any new
account or any purchase order for failure to supply a certified TIN.

EXHIBIT A 

REDUCED SALES CHARGES (CLASS A ONLY) 

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.

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

Letter of Intent.  If you plan to  purchase  $50,000 or more of 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 fund 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 Statement of
Additional Information.

Group  Purchases.  If you are a member of a qualified  group,  you may  purchase
shares of the Fund at the reduced sales charge  applicable to the group taken as
a whole.  The sales  charge is  calculated  by taking into  account not only the
dollar amount of the shares you purchase, but also the higher of cost or current
value of shares previously purchased and currently held by other members of your
group.

A  "qualified  group" is one which (i) has been in  existence  for more than six
months,  (ii) has a purpose other than acquiring Fund shares at a discount,  and
(iii)  satisfies  uniform  criteria  which enable CDI and dealers  offering Fund
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  dealers  distributing  the Fund's
shares,  must agree to include sales and other materials  related to the Fund in
its  publications  and  mailings  to  members  at  reduced  or no cost to CDI or
dealers,  and  must  seek  to  arrange  for  payroll  deduction  or  other  bulk
transmission of investments to the Fund.

Pension plans may not qualify  participants for group purchases;  however,  such
plans may qualify for reduced  sales  charges  under a separate  provision  (see
below). Members of a group are not eligible for a Letter of Intent.

Retirement Plans Under Section 457, Section 403(b)(7),  or Section 401(k). There
is no sales  charge on shares  purchased  for the benefit of a  retirement  plan
under Section 457 of the Internal Revenue Code of 1986, as amended ("Code"),  or
for a plan  qualifying  under  Section  403(b)(7) of the Code if, at the time of
purchase, Calvert Group has been notified in writing that the 403(b)(7) plan has
at least 200 eligible employees. Furthermore, there is no sales charge on shares
purchased for the benefit of a retirement plan  qualifying  under Section 401(k)
of the Code if, at the time of such purchase,  the 401(k) plan administrator has
notified  Calvert  Group in  writing  that a) its  401(k)  plan has at least 200
eligible  employees;  or b) the cost or current  value of shares the plan has in
Calvert Group of Funds (except money market funds) is at least $1 million.

Neither the Fund,  nor 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.

Other  Circumstances.  There is no sales charge on shares of any fund (portfolio
or series) of the Calvert Group of Funds sold to (i) current and retired members
of the Board of  Trustees/Directors  of the  Calvert  Group of  Funds,  (and the
Advisory  Council  of the  Calvert  Social  Investment  Fund);  (ii)  directors,
officers  and  employees  of the  Advisor,  Distributor,  and  their  affiliated
companies;  (iii) directors,  officers and registered representatives of brokers
distributing  the Fund's shares;  and immediate family members of persons listed
in (i), (ii), and (iii), above; (iv) dealers,  brokers, or registered investment
advisors that have entered into an agreement with CDI providing specifically for
the use of shares of the Fund  (Portfolio  or Series) in  particular  investment
programs or products  (where such  program or product  already has a fee charged
therein)  made  available to the clients of such dealer,  broker,  or registered
investment advisor;  (v) trust departments of banks or savings  institutions for
trust clients of such bank or savings  institution;  and (vi)  purchases  placed
through a broker  maintaining  an omnibus  account with the Fund  (Portfolio  or
Series) and 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 Calvert  Income  Fund may be sold at net asset
value to accounts opened on or before January 12, 1987.

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.  Dividends and distributions from Calvert Group money market funds
used to purchase  shares of the Fund are not be subject to the applicable  sales
charge.

Reinstatement  Privilege.  If you redeem  Fund  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 Fund reserves the right to
modify or eliminate this privilege.

================================================================================


To Open an Account:                               Prospectus 
     800-368-2748                                 January 31, 1995 
                                                  As Revised September 30, 1995 

Yields and Prices: 
Calvert Information Network                       THE CALVERT FUND 
24 hours, 7 days a week                           CALVERT INCOME FUND 
     800-368-2745 
      
Service for Existing Account: 
     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, 6th Floor 
1004 Baltimore 
Kansas City, MO 64105 

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

================================================================================

Table of Contents 

Fund Expenses 
Financial Highlights 
Investment Objective and Policies 
Yield and Total Return 
Management of the Fund 
SHAREHOLDER GUIDE: 
Alternative Sales Options 
How to Buy Shares 
Net Asset Value 
When Your Account Will Be Credited 
Exchanges 
Other Calvert Group Services 
Selling Your Shares 
How to Sell Your Shares 
Dividends, Capital Gains and Taxes 
Exhibit A - Reduced Sales Charges 



 




 


PROSPECTUS 
January 31, 1995 

THE CALVERT FUND 
Calvert U. S. Government Fund 
Calvert Income Fund 
4550 Montgomery Avenue, Bethesda, Maryland 20814 

INVESTMENT OBJECTIVES 

Calvert U.S.  Government  Fund seeks to provide high current  income  consistent
with safety of  principal by investing  in a  professionally  managed  portfolio
consisting  primarily  of  U.S.  Government-backed   obligations.  There  is  no
limitation on the maturity of obligations in which Calvert U.S.  Government Fund
may invest.

Calvert Income Fund seeks to maximize long-term income, to the extent consistent
with  prudent  investment  management  and  preservation  of  capital,   through
investment in bonds and other income  producing  securities of investment  grade
quality.

Each Fund offers two classes of shares,  each with different  expense levels and
sales  charges.  You may  choose to  purchase  (i) Class A shares,  with a sales
charge imposed at the time you purchase the shares  ("front-end  sales charge");
or (ii) Class C shares  which  impose  neither a  front-end  sales  charge nor a
contingent  deferred sales charge.  Class C shares are not available through all
dealers.  Class C shares have a higher  level of  expenses  than Class A shares,
including  higher Rule 12b-1 fees. These  alternatives  permit you to choose the
method of purchasing  shares that is most  beneficial  to you,  depending on the
amount of the  purchase,  the length of time you expect to hold the shares,  and
other circumstances. See "Alternative Sales Options" for further details.

TO OPEN AN ACCOUNT 

Call your  broker,  or complete  and return the  enclosed  Account  Application.
Minimum investment is $2,000 per Fund.

ABOUT THIS PROSPECTUS 

Please read this Prospectus before investing. It is designed to provide you with
information  you ought to know  before  investing  and to help you decide if the
Funds' goals match your own. Keep this document for future reference.

A Statement of Additional Information for the Funds (dated January 31, 1995) has
been filed with the Securities and Exchange  Commission and is  incorporated  by
reference.  This  free  Statement  is  available  upon  request  from the  Fund:
800-368-2748.

THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES  COMMISSION,  NOR HAS THE FEDERAL OR
ANY STATE  SECURITIES  COMMISSION  PASSED ON THE  ACCURACY  OR  ADEQUACY OF THIS
PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

SHARES OF THE FUND ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK,  AND ARE NOT FEDERALLY  INSURED BY THE FDIC,  THE FEDERAL  RESERVE
BOARD,  OR ANY OTHER AGENCY.  WHEN  INVESTORS SELL SHARES OF THE FUND, THE VALUE
MAY BE HIGHER OR LOWER THAN THE AMOUNT ORIGINALLY PAID FUND EXPENSES 

<TABLE>
<CAPTION>

         CALVERT INCOME FUND 

                                                     Class A           Class C 
<S>                                                  <C>               <C>

A.       Shareholder Transaction Costs
         Maximum Sales Charge on                     3.75%             None 
         Purchases (as a percentage 
         of offering price) 

         Contingent Deferred Sales Charge            None              None 

B.       Annual Fund Operating Expenses<F1> 
         Fiscal Year 1994 (as a percentage 
         of net assets, net of any applicable 
         expense reimbursement/fee waiver) 

         Management Fees                             0.70%             0.70% 
         Rule 12b-1 Service and 
         Distribution Fees                           0.25%             1.00% 
         Other Expenses                              0.31%             1.13% 
         Total Fund Operating Expenses               1.26%             2.83% 

<FN>
<F1>Expense  ratios for Class A shares have been  restated  to reflect  expenses
anticipated for fiscal year 1995. 
</FN>
</TABLE>

================================================================================

<TABLE>
<CAPTION>

         CALVERT U.S. GOVERNMENT FUND 
                                                     Class A           Class C 
<S>                                                  <C>               <C>

A.       Shareholder Transaction Costs
         Maximum Sales Charge on                     3.75%             None 
         Purchases (as a percentage 
         of offering price) 

         Contingent Deferred Sales Charge            None              None 

B.       Annual Fund Operating Expenses<F2> 
         Fiscal Year 1994 (as a percentage 
         of net assets, net of any applicable 
         expense reimbursement/fee waiver) 

         Management Fees                             0.60%             0.60% 
         Rule 12b-1 Service and 
         Distribution Fees                           0.25%             1.00% 
         Other Expenses                              0.50%             0.93% 
         Total Fund Operating Expenses               1.35%             2.53% 

<FN>
<F2>Expense  ratios for Class A shares have been  restated  to reflect  expenses
anticipated for fiscal year 1995. 
</FN>
</TABLE>


C.  Example:  You  would  pay the  following  expenses  on a $1,000  investment,
assuming (1) 5% annual return and (2) redemption at the end of each period:

<TABLE>
<CAPTION>

Fund                            1 Year   3 Years    5 Years     10 Years 

<S>                             <C>      <C>        <C>         <C>   

Calvert Income Fund 
Class A<F3>                     $50      $76        $104        $184 
Class C                         $29      $88        $149        $316 

Calvert U.S. Government Fund 
Class A<F2>                     $51      $79        $109         $194 
Class C                         $26      $79        $135         $287 

Explanation of Table: The purpose of the table is to assist you in understanding
the various  costs and expenses  that an investor in the Fund may bear  directly
(shareholder transaction costs) or indirectly (annual fund operating expenses).

<FN>
<F2>Expense  ratios for Class A shares have been  restated  to reflect  expenses
anticipated for fiscal year 1995.
 
<F3>Assumes payment of maximum initial sales charge at time of purchase. 
</FN>
</TABLE>


A. Shareholder Transaction Costs are charges you pay when you buy or sell shares
of the Fund.  See "Reduced Sales Charges" at Exhibit A to see if you qualify for
possible  reductions  in the sales charge.  If you request a wire  redemption of
less than $1,000, you will be charged a $5 wire fee.

B.  Annual  Fund  Operating  Expenses.  Management  Fees are paid by the Fund to
Calvert Asset Management Company, Inc.  ("Investment  Advisor") for managing the
Funds'  investments  and business  affairs.  The Funds incur Other  Expenses for
maintaining shareholder records,  furnishing shareholder statements and reports,
and  other  services.  Management  Fees and Other  Expenses  have  already  been
reflected in the Funds' share price and are not charged  directly to  individual
shareholder  accounts.  Please  refer to  "Management  of the Fund" for  further
information.

The Fund's Rule 12b-1 fees include an  asset-based  sales  charge.  Thus,  it is
possible  that  long-term  shareholders  in the Fund 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.

C.  Example of  Expenses.  The  example,  which is  hypothetical,  should not be
considered a  representation  of past or future  expenses.  Actual  expenses and
return may be higher or lower than those shown.

================================================================================
FINANCIAL HIGHLIGHTS 

The following  tables provide  information  about the financial  history of each
Fund's Class A and C shares.  They express the  information in terms of a single
share  outstanding for the respective  Fund  throughout each period.  The tables
have been audited by those independent accountants whose reports are included in
the respective Annual Reports to Shareholders of the Funds. The tables should be
read in conjunction  with the financial  statements and their related notes. The
current Annual Reports to  Shareholders  are  incorporated by reference into the
Statement of Additional Information.


<TABLE>
<CAPTION>

Calvert Income Fund                                    Class C Shares                 
                                                       From Inception                 
                                                       (March 1, 1994) To             
                                                       September 30, 1994 

<S>                                                    <C>   

Net asset value, beginning of period                   $17.35                         

Income from investment operations 
Net investment income                                  .57                            
Net realized and unrealized gain 
(loss) on investments                                  (1.67)                         
Total from investment operations                       (1.10)                         

Distributions to shareholders 
Dividends from net investment income                   (.62)                          
Distribution from capital gains                        --                             
Total Distributions                                    (.62)                          
Total increase (decrease) in 
net asset value                                        (1.72)                         

Net asset value, end of period                         $15.63                         

Total return<F4>                                      (5.47)%                        

Ratio of expenses to average 
net assets                                             2.65%(a)                       

Ratio of net income to average 
net assets                                             5.62%(a)                       

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                  7.29%(a)                       

Portfolio turnover                                     34%                            

Net assets, end of period                              $413,187                       

Number of shares outstanding 
at end of period (in thousands)                        26 

<FN>
<F4>Total return does not reflect  deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited. 
(a) Annualized
</FN>
</TABLE>

================================================================================

<TABLE>
<CAPTION>

Calvert Income Fund                            Class A Shares 
                                               Year Ended 
                                               September 30, 1994 
                                          
<S>                                            <C>

Net asset value, beginning of period           $18.41 

Income from investment operations 
Net investment income                          1.16 
Net realized and unrealized gain 
(loss) on investments                          (2.42) 
Total from investment operations               (1.26) 

Distributions to shareholders 
Dividends from net investment income           (1.16) 
Distribution from capital gains                (.31) 
Total Distributions                            (1.47) 
Total increase (decrease) in 
net asset value                                (2.73) 

Net asset value, end of period                 $15.68 

Total return<F4>                               (6.94)% 

Ratio of expenses to average 
net assets                                     1.07% 

Ratio of net income to average 
net assets                                     6.86% 

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                          -- 

Portfolio turnover                             34% 

Net assets, end of period                      $45,935,905 

Number of shares outstanding 
at end of period (in thousands)                2,929 

<FN>
<F4>Total return does not reflect  deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited. 
(a) Annualized
</FN>
</TABLE>

<TABLE>
<CAPTION>

Calvert Income Fund 
                                                  Class A Shares
                                                  Year Ended September 30, 1993   
<S>                                                    <C>

Net asset value, beginning of period                   $17.50                     

Income from investment operations 
Net investment income                                  1.23                       
Net realized and unrealized gain 
(loss) on investments                                  .91                        
Total from investment operations                       2.14                       

Distributions to shareholders 
Dividends from net investment income                   (1.23)                     
Distribution from capital gains                        --                         
Total Distributions                                    (1.23)                     
Total increase (decrease) in 
net asset value                                        .91                        

Net asset value, end of period                         $18.41                     

Total return<F5>                                       12.47%                     

Ratio of expenses to average 
net assets                                             1.00%                      

Ratio of net income to average 
net assets                                             6.93%                      

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                  --                         

Portfolio turnover                                     25%                        

Net assets, end of period                              $53,134,459                

Number of shares outstanding 
at end of period (in thousands)                        2,886 

<FN>
<F5>Total return does not reflect  deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
(a) Annualized
</FN>
</TABLE>
                     
================================================================================

<TABLE>
<CAPTION>

Calvert Income Fund 
                                                 Class A Shares                    
                                                 Year Ended September 30, 1992       
<S>                                                    <C>
                                                                  
Net asset value, beginning of period                   $16.61     
                                                                  
Income from investment operations                                 
Net investment income                                  1.28       
Net realized and unrealized gain                                  
(loss) on investments                                  .89        
Total from investment operations                       2.17       
                                                                  
Distributions to shareholders                                     
Dividends from net investment income                   (1.28)     
Distribution from capital gains                        --         
Total Distributions                                    (1.28)     
Total increase (decrease) in                                      
net asset value                                        .89        
                                                                  
Net asset value, end of period                         $17.50     
                                                                  
Total return<F5>                                       13.66%     
                                                                  
Ratio of expenses to average                                      
net assets                                             1.04%      
                                                                  
Ratio of net income to average                                    
net assets                                             7.59%      
                                                                  
Increase reflected in above net                                   
investment income ratios due to                                   
expense reimbursement                                  --         
                                                                  
Portfolio turnover                                     18%        
                                                                  
Net assets, end of period                              $43,494,326
                                                                  
Number of shares outstanding                                      
at end of period (in thousands)                        2,486

<FN>
<F5>Total return does not reflect  deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
(a) Annualized
</FN>
</TABLE>
                                                            
================================================================================

<TABLE>
<CAPTION>

Calvert Income Fund 
                                                  Class A Shares 
                                                  Year Ended September 30, 1991      
<S>                                                    <C>

Net asset value, beginning of period                   $15.58                        

Income from investment operations 
Net investment income                                  1.31                          
Net realized and unrealized gain 
(loss) on investments                                  1.03                          
Total from investment operations                       2.34                          

Distributions to shareholders 
Dividends from net investment income                   (1.31)                        
Distribution from capital gains                        --                            
Total Distributions                                    (1.31)                        
Total increase (decrease) in 
net asset value                                        1.03                          

Net asset value, end of period                         $16.61                        

Total return<F6>                                       15.72%                        

Ratio of expenses to average 
net assets                                             1.08%                         

Ratio of net income to average 
net assets                                             8.22%                         

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                  --                            

Portfolio turnover                                     27%                           

Net assets, end of period                              $36,412,545                   

Number of shares outstanding 
at end of period (in thousands)                        2,193  

                       
<FN>
<F6>Total return does not reflect  deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited. 
(a) Annualized
</FN>
</TABLE>

================================================================================

<TABLE>
<CAPTION>

Calvert Income Fund 
                                               Class A Shares               
                                               Year Ended September 30, 1990 
<S>                                                <C>
                                                  
Net asset value, beginning of period               $16.36 

Income from investment operations 
Net investment income                              1.36 
Net realized and unrealized gain 
(loss) on investments                              (.78) 
Total from investment operations                   .58 

Distributions to shareholders 
Dividends from net investment income               (1.36) 
Distribution from capital gains                    -- 
Total Distributions                                (1.36) 
Total increase (decrease) in 
net asset value                                    (.78) 

Net asset value, end of period                     $15.58 

Total return<F6>                                    3.63% 

Ratio of expenses to average 
net assets                                         1.05% 

Ratio of net income to average 
net assets                                         8.42% 

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                              -- 

Portfolio turnover                                 5% 

Net assets, end of period                          $32,201,363 

Number of shares outstanding 
at end of period (in thousands)                    2,066 

<FN>
<F6>Total return does not reflect  deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited. 
(a) Annualized
</FN>
</TABLE>

================================================================================
<TABLE>
<CAPTION>

Calvert Income Fund 
                                                  Class A Shares 
                                                  Year Ended September 30, 1989                          
<S>                                                    <C>

Net asset value, beginning of period                   $15.70                        

Income from investment operations 
Net investment income                                  1.36                          
Net realized and unrealized gain 
(loss) on investments                                  .71                           
Total from investment operations                       2.07                          

Distributions to shareholders 
Dividends from net investment income                   (1.41)                        
Distribution from capital gains                        --                            
Total Distributions                                    (1.41)                        
Total increase (decrease) in 
net asset value                                        .66                           

Net asset value, end of period                         $16.36                        

Total return<F7>                                       13.48%                        

Ratio of expenses to average 
net assets                                             1.07%                         

Ratio of net income to average 
net assets                                             8.57%                         

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                  --                            

Portfolio turnover                                     19%                           

Net assets, end of period                              $22,969,095                   

Number of shares outstanding 
at end of period (in thousands)                        1,404 


<FN>
<F7>Total return does not reflect  deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited. 
(a) Annualized
</FN>
</TABLE>
                        

================================================================================
<TABLE>
<CAPTION>

Calvert Income Fund 
                                                  Class A Shares 
                                                  Year Ended September 30, 1988 
<S>                                                     <C>

Net asset value, beginning of period                    $15.29       

Income from investment operations 
Net investment income                                   1.42 
Net realized and unrealized gain 
(loss) on investments                                   .71 
Total from investment operations                        2.13 

Distributions to shareholders 
Dividends from net investment income                    (1.42) 
Distribution from capital gains                         (.30) 
Total Distributions                                     (1.72) 
Total increase (decrease) in 
net asset value                                         .41 

Net asset value, end of period                          $15.70 

Total return<F7>                                        14.67% 

Ratio of expenses to average 
net assets                                              .94% 

Ratio of net income to average 
net assets                                              9.07% 

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                   .25% 

Portfolio turnover                                      37% 

Net assets, end of period                               $20,374,751 

Number of shares outstanding 
at end of period (in thousands)                         1,298 


<FN>
<F7>Total return does not reflect  deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited. 
(a) Annualized
</FN>
</TABLE>


================================================================================

<TABLE>
<CAPTION>

Calvert Income Fund 
                                             Class A Shares 
                                             Year Ended September 30, 1987                           
<S>                                                    <C>

Net asset value, beginning of period                   $17.04                         

Income from investment operations 
Net investment income                                  1.51                           
Net realized and unrealized gain 
(loss) on investments                                  (1.61)                         
Total from investment operations                       (.10)                          

Distributions to shareholders 
Dividends from net investment income                   (1.47)                         
Distribution from capital gains                        (.18)                          
Total Distributions                                    (1.65)                         
Total increase (decrease) in 
net asset value                                        (1.75)                         

Net asset value, end of period                         $15.29                         

Total return<F8>                                       (.84)%                         

Ratio of expenses to average 
net assets                                             .85%                           

Ratio of net income to average 
net assets                                             9.06%                          

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                  .25%                           

Portfolio turnover                                     42%                            

Net assets, end of period                              $20,573,546                     

Number of shares outstanding 
at end of period (in thousands)                        1,345 


<FN>
<F8>Total return does not reflect  deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
(a) Annualized 
</FN>
</TABLE>
                         
================================================================================
<TABLE>
<CAPTION>

Calvert Income Fund 
                                                 Class A Shares 
                                                 Year Ended September 30, 1986 
<S>                                                     <C>

Net asset value, beginning of period                    $15.78 

Income from investment operations 
Net investment income                                   1.57 
Net realized and unrealized gain 
(loss) on investments                                   1.26 
Total from investment operations                        2.83 

Distributions to shareholders 
Dividends from net investment income                    (1.57) 
Distribution from capital gains                         -- 
Total Distributions                                     (1.57) 
Total increase (decrease) in 
net asset value                                         1.26 

Net asset value, end of period                          $17.04 

Total return<F8>                                        18.38% 

Ratio of expenses to average 
net assets                                              .85% 

Ratio of net income to average 
net assets                                              9.16% 

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                   .33% 

Portfolio turnover                                      23% 

Net assets, end of period                               $21,455,859 

Number of shares outstanding 
at end of period (in thousands)                         1,259 

<FN>
<F8>Total return does not reflect  deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
(a) Annualized 
</FN>
</TABLE>

================================================================================
<TABLE>
<CAPTION>

Calvert Income Fund 
                                                 Class A Shares 
                                                 Year Ended September 30, 1985 
<S>                                                    <C>

Net asset value, beginning of period                   $14.30 

Income from investment operations 
Net investment income                                  1.72 
Net realized and unrealized gain 
(loss) on investments                                  1.53 
Total from investment operations                       3.25 

Distributions to shareholders 
Dividends from net investment income                   (1.77) 
Distribution from capital gains                        -- 
Total Distributions                                    (1.77) 
Total increase (decrease) in 
net asset value                                        1.48 

Net asset value, end of period                         $15.78 

Total return<F9>                                       23.31% 

Ratio of expenses to average 
net assets                                             .82% 

Ratio of net income to average 
net assets                                             10.74% 

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                  .61% 

Portfolio turnover                                     11% 

Net assets, end of period                              $13,428,901 

Number of shares outstanding 
at end of period (in thousands)                        851


<FN>
<F9>Total return does not reflect  deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
(a) Annualized 
</FN>
</TABLE>
 


================================================================================
<TABLE>
<CAPTION>

Calvert U.S. Government Fund                           Class C Shares                 
                                                       From Inception                 
                                                       (March 1, 1994) To             
                                                       September 30, 1994 
<S>                                                     <C>

New asset value, beginning of period                   $14.77                         

Income from investment operations 
Net investment income                                 .34                             
Net realized and unrealized gain 
(loss) on investments                                  (1.01)                         
Total from investment operations                       (.67)                          
Distributions to shareholders 
Dividends from net investment income                   (.39)                          
Distribution from capital gains                        --                             
Total Distributions                                    (.39)                          
Total increase (decrease) in 
net asset value                                        (1.06)                         

Net asset value, end of period                         $13.71                         

Total return<F10>                                     (3.58)%                        

Ratio of expenses to average 
net assets                                             2.41%(a)                       

Ratio of net income to average 
net assets                                             4.39%(a)                       

Increase reflected in above net 
investment income ratio due to 
expense reimbursement                                  7.96%(a)                       

Portfolio turnover                                     99%                            

Net assets, end of period                              $301,837                       

Number of shares outstanding 
at end of period (in thousands)                        22 

<FN>
<F10>Total return does not reflect deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
(a) Annualized 
</FN>
</TABLE>

================================================================================
<TABLE>
<CAPTION>

Calvert U.S. Government Fund                           Class A Shares 
                                                       Year Ended 
                                                       September 30, 1994 
                                                      
<S>                                                    <C>

New asset value, beginning of period                   $16.17 

Income from investment operations 
Net investment income                                  .75 
Net realized and unrealized gain 
(loss) on investments                                  (1.53) 
Total from investment operations                       (.78) 
Distributions to shareholders 
Dividends from net investment income                   (.75) 
Distribution from capital gains                        (.90) 
Total Distributions                                    (1.65) 
Total increase (decrease) in 
net asset value                                        (2.43) 

Net asset value, end of period                         $13.74 

Total return<F10>                                     (5.19)% 

Ratio of expenses to average 
net assets                                             1.02% 

Ratio of net income to average 
net assets                                             4.99% 

Increase reflected in above net 
investment income ratio due to 
expense reimbursement                                  -- 

Portfolio turnover                                     99% 

Net assets, end of period                              $9,720,843 

Number of shares outstanding 
at end of period (in thousands)                        708 

<FN>
<F10>Total return does not reflect deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
(a) Annualized 
</FN>
</TABLE>


================================================================================
<TABLE>
<CAPTION>

Calvert U.S. Government Fund 
                                                 Class A Shares 
                                                 Year Ended September 30, 1993       
<S>                                                    <C>

Net asset value, beginning of period                   $15.72                        

Income from investment operations 
Net investment income                                  .87                           
Net realized and unrealized gain 
(loss) on investments                                  .45                           
Total from investment operations                       1.32                          

Distributions to shareholders 
Dividends from net investment income                   (.87)                         
Distribution from capital gains                        --                            
Total Distributions                                    (.87)                         
Total increase (decrease) in 
net asset value                                        .45                           

Net asset value, end of period                         $16.17                        

Total return<F11>                                       8.70%                         

Ratio of expenses to average 
net assets                                             .95%                          

Ratio of net income to average 
net assets                                             5.49%                         

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                  --                            

Portfolio turnover                                     191%                          

Net assets, end of period                              $13,652,275                   

Number of shares outstanding 
at end of period (in thousands)                        844

<FN>
<F11>Total return does not reflect deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
(a) Annualized 
</FN>
</TABLE>
                           

================================================================================
<TABLE>
<CAPTION>

Calvert U.S. Government Fund 
                                                 Class A Shares 
                                                 Year Ended September 30, 1992 
<S>                                                    <C>

Net asset value, beginning of period                   $15.19 

Income from investment operations 
Net investment income                                  .95 
Net realized and unrealized gain 
(loss) on investments                                  .53 
Total from investment operations                       1.48 

Distributions to shareholders 
Dividends from net investment income                   (.95) 
Distribution from capital gains                        -- 
Total Distributions                                    (.95) 
Total increase (decrease) in 
net asset value                                        .53 

Net asset value, end of period                         $15.72 

Total return<F11>                                      10.07% 

Ratio of expenses to average 
net assets                                             1.11% 

Ratio of net income to average 
net assets                                             6.15% 

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                  -- 

Portfolio turnover                                     -- 

Net assets, end of period                              $13,222,748 

Number of shares outstanding 
at end of period (in thousands)                        841 

<FN>
<F11>Total return does not reflect deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
(a) Annualized 
</FN>
</TABLE>


================================================================================
<TABLE>
<CAPTION>

Calvert U.S. Government Fund 
                                                Class A Shares 
                                                Year Ended September 30, 1991                           
<S>                                                    <C>

Net asset value, beginning of period                   $14.50                         

Income from investment operations 
Net investment income                                  1.00                           
Net realized and unrealized gain 
(loss) on investments                                  .69                            
Total from investment operations                       1.69                           

Distributions to shareholders 
Dividends from net investment income                   (1.00)                         
Distribution from capital gains                        --                             
Total Distributions                                    (1.00)                         
Total increase (decrease) in 
net asset value                                        .69                            

Net asset value, end of period                         $15.19                         

Total return<F12>                                      12.07%                         

Ratio of expenses to average 
net assets                                             1.26%                          

Ratio of net income to average 
net assets                                             6.69%                          

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                  --                             

Portfolio turnover                                     --                             

Net assets, end of period                              $11,935,308                    

Number of shares outstanding 
at end of period (in thousands)                        785 

<FN>
<F12>Total return does not reflect deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
(a) Annualized 
</FN>
</TABLE>
                           

================================================================================
<TABLE>
<CAPTION>

Calvert U.S. Government Fund 
                                                 Class A Shares 
                                                 Year Ended September 30, 1990 
<S>                                                   <C>

Net asset value, beginning of period                  $14.52 

Income from investment operations 
Net investment income                                 1.13 
Net realized and unrealized gain 
(loss) on investments                                 (.02) 
Total from investment operations                      1.11 

Distributions to shareholders 
Dividends from net investment income                  (1.13) 
Distribution from capital gains                       -- 
Total Distributions                                   (1.13) 
Total increase (decrease) in 
net asset value                                       (.02) 

Net asset value, end of period                        $14.50 

Total return<F12>                                      7.91% 

Ratio of expenses to average 
net assets                                            .75% 

Ratio of net income to average 
net assets                                            7.77% 

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                 .51% 

Portfolio turnover                                    -- 

Net assets, end of period                             $5,624,122 

Number of shares outstanding 
at end of period (in thousands)                       388 

<FN>
<F12>Total return does not reflect deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
(a) Annualized 
</FN>
</TABLE>
 

================================================================================
<TABLE>
<CAPTION>


Calvert U.S. Government Fund 
                                                  Class A Shares 
                                                  Year Ended September 30, 1989                           
<S>                                                    <C>

Net asset value, beginning of period                   $14.34                         

Income from investment operations 
Net investment income                                  1.19                           
Net realized and unrealized gain 
(loss) on investments                                  .21                            
Total from investment operations                       1.40                           

Distributions to shareholders 
Dividends from net investment income                   (1.22)                         
Distribution from capital gains                        --                             
Total Distributions                                    (1.22)                         
Total increase (decrease) in 
net asset value                                        .18                            

Net asset value, end of period                         $14.52                         

Total return<F13>                                      10.20%                         

Ratio of expenses to average 
net assets                                             .75%                           

Ratio of net income to average 
net assets                                             8.32%                          

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                  .54%                           

Portfolio turnover                                     --                             

Net assets, end of period                              $3,379,592                     

Number of shares outstanding 
at end of period (in thousands)                        233   

<FN>
<F13>Total return does not reflect deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
(a) Annualized 
</FN>
</TABLE>
                         
================================================================================
<TABLE>
<CAPTION>

Calvert U.S. Government Fund 
                                                  Class A Shares 
                                                  Year Ended September 30, 1988 
<S>                                                   <C>

Net asset value, beginning of period                  $13.54 

Income from investment operations 
Net investment income                                 1.23 
Net realized and unrealized gain 
(loss) on investments                                 .80 
Total from investment operations                      2.03 

Distributions to shareholders 
Dividends from net investment income                  (1.23) 
Distribution from capital gains                       -- 
Total Distributions                                   (1.23) 
Total increase (decrease) in 
net asset value                                       .80 

Net asset value, end of period                        $14.34 

Total return<F13>                                     15.36% 

Ratio of expenses to average 
net assets                                            .53% 

Ratio of net income to average 
net assets                                            8.60% 

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                 1.10% 

Portfolio turnover                                    8% 

Net assets, end of period                             $2,988,364 

Number of shares outstanding 
at end of period (in thousands)                       208 

<FN>
<F13>Total return does not reflect deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
(a) Annualized 
</FN>
</TABLE>

================================================================================
<TABLE>
<CAPTION>

Calvert U.S. Government Fund                                                         
                                                  Class A Shares                     
                                                  Year Ended September 30, 1987                 
                                                                                
<S>                                                    <C>

Net asset value, beginning of period                   $14.77                        

Income from investment operations 
Net investment income                                  1.23                          
Net realized and unrealized gain 
(loss) on investments                                  (1.26)                        
Total from investment operations                       (.03)                         

Distributions to shareholders 
Dividends from net investment income                   (1.20)                        
Distribution from capital gains                        --                            
Total Distributions                                    (1.20)                        
Total increase (decrease) in 
net asset value                                        (1.23)                        

Net asset value, end of period                         $13.54                        

Total return<F14>                                      (.54)%                        

Ratio of expenses to average 
net assets                                             .50%                          

Ratio of net income to average 
net assets                                             8.58%                         

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                  1.31%                         

Portfolio turnover                                     115%                          

Net assets, end of period                              $2,416,948                    

Number of shares outstanding 
at end of period (in thousands)                        179

<FN>
<F14>Total return does not reflect deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
(a) Annualized 
</FN>
</TABLE>

                          

================================================================================
<TABLE>
<CAPTION>

Calvert U.S. Government Fund                          
                                                      Class A Shares                                
                                                      From Inception 
                                                      (May 22, 1986 
                                                      To September 30, 
                                                      1986 
<S>                                                   <C>

Net asset value, beginning of period                  $15.00 

Income from investment operations 
Net investment income                                 .35 
Net realized and unrealized gain 
(loss) on investments                                 (.24) 
Total from investment operations                      .11 

Distributions to shareholders 
Dividends from net investment income                  (.34) 
Distribution from capital gains                       -- 
Total Distributions                                   (.34) 
Total increase (decrease) in 
net asset value                                       (.23) 

Net asset value, end of period                        $14.77 

Total return<F14>                                       .72% 

Ratio of expenses to average 
net assets                                            .50%(a) 

Ratio of net income to average 
net assets                                            7.01%(a) 

Increase reflected in above net 
investment income ratios due to 
expense reimbursement                                 4.53%(a) 

Portfolio turnover                                    -- 

Net assets, end of period                             $902,868 

Number of shares outstanding 
at end of period (in thousands)                       61 


<FN>
<F14>Total return does not reflect deduction of Class A front-end sales charges.
Total return prior to 1989 is not audited.
(a) Annualized 
</FN>
</TABLE>


================================================================================

INVESTMENT OBJECTIVES AND POLICIES 

Calvert  U.S.  Government  Fund  invests  primarily  in  U.S.  Government-backed
obligations.

Calvert U.S.  Government  Fund seeks to provide high current  income  consistent
with safety of  principal by investing  in a  professionally  managed  portfolio
consisting primarily of U.S. Government-backed obligations. There is no limit on
the maturity of securities in which Calvert U.S. Government Fund may invest.

Under normal  circumstances,  this Fund attempts to invest 100% of its assets in
U.S. Government-backed obligations which include:

(1)  Mortgage  pass-through  certificates  issued  by  the  Government  National
Mortgage Association (known as "GNMAs" or "Ginnie Maes");

(2) Direct  obligations  of the United  States  Treasury  which  consist of U.S.
Treasury  bills (having  maturities of one year or less),  U.S.  Treasury  notes
(having  maturities  of one to ten years)  and U.S.  Treasury  bonds  (generally
having maturities greater than ten years);

(3)  Obligations  issued or  guaranteed  by the United  States  Government,  its
agencies,  or its  instrumentalities  which are supported by: (a) the full faith
and credit of the U.S.  Government  (for example,  GNMAs);  (b) the right of the
issuer to borrow an amount  limited  to a  specific  line of credit for the U.S.
Government  (for  example,   obligations  of  the  Federal   National   Mortgage
Association,  known as  "Fannie  Maes");  and (c) the  credit  of the  agency or
instrumentality  (for  example,  obligations  of the Federal Home Loan  Mortgage
Corporation, known as "Freddie Macs");

(4) Securities  collateralized  by the  mortgage-related  obligations  described
above ("collateralized mortgage obligations" or "CMOs"); and

(5) U.S.  Government-backed  obligations  subject to repurchase  agreements with
recognized securities dealers and banks.

The Advisor  anticipates  that a  substantial  portion of the  Government-backed
obligations in Calvert U.S.  Government  Fund's  portfolio will consist of GNMAs
although there is no set percentage that must be invested in GNMAs.

Calvert  Income  Fund  invests in  corporate  bonds.  80% of its assets  must be
invested in bonds of investment grade quality.

Calvert Income Fund seeks to maximize long-term income, to the extent consistent
with  prudent  investment  management  and  preservation  of capital,  primarily
through  investment  in  investment  grade  bonds  and  other   income-producing
securities. Debt securities may be long-term, intermediate-term,  short-term, or
any combination  thereof,  depending on the Advisor's  evaluation of current and
anticipated  market  patterns  and trends.  The Advisor  expects that the Fund's
average weighted maturity will range between 5 and 20 years.

Calvert Income Fund invests 80% of its assets in corporate  obligations which at
the date of investment are rated within the four highest  grades  established by
Moody's Investors Services, Inc. (Aaa, Aa, A, or Baa), or by Standard and Poor's
Corporation (AAA, AA, A, or BBB), or if not rated, are of comparable  quality as
determined  by the Advisor.  Though still  investment  grade,  securities  rated
BBB/Baa possess certain speculative  elements and are generally more susceptible
to changing  market  conditions.  All fixed  income  instruments  are subject to
interest-rate  risk;  that is, when  market  interest  rates  rise,  the current
principal value of a bond will decline.

The  remaining  20% of the  Fund's  total  assets  may  consist  of  other  debt
securities (see below)  including bonds rated below BBB or Baa  ("non-investment
grade  securities,"  commonly  known as "junk  bonds").  With lower rated bonds,
there is a greater possibility that an adverse change in the financial condition
of the issuer may affect its ability to pay principal and interest. In addition,
to the extent the Fund holds any such bonds,  it may be  negatively  affected by
adverse economic developments,  increased volatility or a lack of liquidity. See
the Statement of Additional Information, "Non-Investment Grade Debt Securities,"
and bond ratings.

Calvert  Income Fund may also  purchase  obligations  issued or guaranteed as to
principal  by  the  U.S.  Government  or  its  agencies  or   instrumentalities;
certificates of deposit,  time deposits,  and bankers' acceptances of U.S. banks
and their branches  located outside of the U.S. and of U.S.  branches of foreign
banks,  provided that the bank has total assets of at least one billion  dollars
or the  equivalent in other  currencies;  commercial  paper which at the date of
investment  is rated  Prime-2 or better by Moody's,  A-2 or better by Standard &
Poor's, or, if not rated, is of comparable quality as determined by the Advisor;
and any of the above securities subject to repurchase agreements with recognized
securities  dealers and banks. Up to 20% of the value of the Fund's total assets
may consist of other debt securities (including  securities  convertible into or
carrying  warrants to purchase  common  stock or other  equity  securities)  and
income-producing preferred and common stocks.

GNMA Certificates 

GNMA  Certificates,   or  GNMAs,  are  mortgage-backed  securities  representing
ownership of mortgage or  construction  loans that are issued by lenders such as
mortgage  bankers,  commercial  banks and savings and loan  associations and are
either  insured by the  Federal  Housing  Administration  or  guaranteed  by the
Veterans Housing  Administration.  The GNMA may be secured by a single mortgage,
such as a large  multi-family  housing  development,  or, more  typically,  by a
"pool" or group of single-family housing mortgages.

Once  approved by GNMA,  the timely  payment of interest  and  principal on each
mortgage  is  guaranteed  by GNMA and backed by the full faith and credit of the
U.S. Government.  GNMAs differ from bonds in that principal is paid back monthly
by the borrower  over the term of the loan rather than returned in a lump sum at
maturity.  GNMAs are called "pass-through"  securities because both interest and
principal payments  (including  prepayments) are passed through to the holder of
the GNMA.  Upon  receipt,  principal  payments will be reinvested by the Fund in
additional  securities at the then  prevailing  interest rate. The amount of any
premium that may be paid upon purchase of a GNMA is not guaranteed.  The Advisor
will attempt, through careful evaluation of available GNMA issues and prevailing
market conditions, to invest in GNMAs which provide a high income return but are
not subject to substantial risk of loss of principal.  Accordingly,  the Advisor
may forgo the  opportunity  to invest in  certain  issues of GNMAs  which  would
provide a high  current  income yield if the Advisor  believes  that such issues
would be subject to a risk of prepayment or loss of principal over the long-term
that would outweigh the short-term increment in yield.

Collateralized Mortgage Obligations 

Collateralized  mortgage  obligations  ("CMOs")  are bonds which are the general
obligations  of the bond issuer.  CMOs may be issued by  governmental  entities,
such  as  the  Federal  Home  Loan   Mortgage   Corporation   (FHLMC),   and  by
non-governmental  entities,  such as banks  and  other  mortgage  lenders.  CMOs
generally are secured by collateral consisting of individual mortgages or a pool
of  mortgages.  CMOs are not  direct  obligations  of the  Government.  However,
Calvert  U.S.  Government  Fund will  purchase  only  those  CMOs which are U.S.
Government-backed   obligations   (those  that  are  secured  by   mortgages  or
mortgage-related  obligations  which  are  issued  or  guaranteed  by  the  U.S.
Government, its agencies or its instrumentalities).

FNMA and FHLMC Certificates 

Each Fund may invest in pass-through certificates issued by the Federal National
Mortgage  Association  ("FNMA")  and  Federal  Home  Loan  Mortgage  Corporation
("FHLMC").  Unlike GNMAs,  which are  typically  interests in pools of mortgages
insured  or  guaranteed  by  government  agencies,  FNMA and FHLMC  certificates
represent undivided interests in pools of conventional mortgage loans.

Financial Futures, Options, and Other Investment Techniques 

Each Fund 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 (U.S.  Government Fund
only),  entering into swap agreements,  and purchasing indexed  securities.  The
Fund can use these practices either as substitution or as protection  against an
adverse   move  in  the  Fund's   portfolio   to  adjust  the  risk  and  return
characteristics of the Fund's portfolio. If the Advisor judges market conditions
incorrectly  or employs a strategy that does not correlate  well with the Fund'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 fund and may involve a small  investment of cash relative to
the magnitude of the risk assumed. Any instruments determined to be illiquid are
subject to the Fund's 10% restriction on illiquid securities.  See the Statement
of Additional Information for more detail about these strategies.

Each Fund may enter into repurchase  agreements and may purchase securities on a
forward or when-issued basis.

In a  repurchase  agreement,  the Fund buys a security  subject to the right and
obligation to sell it back at a higher price.  These  transactions must be fully
secured at all times, but they involve some credit risk to the Fund if the other
party  defaults  on its  obligation  and the Fund is delayed or  prevented  from
liquidating the collateral.

Purchasing  obligations  for future  delivery  or on a  "when-issued"  basis may
increase the Fund's overall  investment  exposure and involves a risk of loss if
the  value  of the  securities  declines  prior  to  the  settlement  date.  The
transactions are fully secured at all times.

Foreign Investments 

Calvert  Income Fund may invest up to 20% of its assets in securities of foreign
issuers,  provided such securities are denominated in U.S.  dollars and trade on
domestic securities exchanges or over-the-counter securities markets. Securities
of foreign  issuers may offer  greater  potential  for capital  appreciation  or
income than the securities of domestic issuers and may involve  investment risks
that are greater than those inherent in the securities of domestic issuers. Such
differences   might   possibly   result  from  future   political  and  economic
developments,  disparities  in  economic  systems,  and  imposition  of  foreign
governmental restrictions. There may also be less publicly available information
about a foreign  issuer than about a domestic  issuer;  foreign  issuers are not
generally  subject to uniform  auditing,  accounting and reporting  requirements
comparable to those applicable to domestic issuers.

Other Policies 

Calvert  Income Fund has the  authority to invest in restricted  securities  and
covered call options, and international money market instruments, and may borrow
money from banks as a temporary measure for extraordinary or emergency purposes.
However,  it does not hold,  and in the coming year it does not plan to acquire,
more  than 5% of the  value of its  assets  in  these  types  of  securities  or
practices.  An  explanation  of such  investment  policies  is set  forth in the
Statement of Additional Information.

Each Fund may lend its  portfolio  securities  to  member  firms of the New York
Stock Exchange and commercial  banks with assets of $1 billion or more, but only
if the value of the securities  loaned from a Fund will not exceed  one-third of
the Fund's assets.

The Funds have adopted certain  fundamental  investment  restrictions  which are
discussed  in  detail  in  the  Statement  of  Additional  Information.   Unless
specifically   noted   otherwise,   the  investment   objective,   policies  and
restrictions  of the  Funds  are  fundamental  and  may not be  changed  without
shareholder approval.

Although  U.S.  Government-backed  obligations  in each Fund's  portfolio may be
guaranteed by the  Government,  a Fund's net asset value per share and yield are
not guaranteed and will change in response to market conditions. There can be no
assurance that any Fund will be successful in meeting its investment objective.

YIELD AND TOTAL RETURN 

The Funds may advertise yield and total return for each class. 

Yield measures the current  investment  performance  for each class of the Fund,
that is, the rate of income on its  portfolio  investments  divided by the share
price.  Yield  is  computed  by  annualizing  the  result  of  dividing  the net
investment  income per share over a 30-day period by the maximum  offering price
per share on the last day of that  period.  Yields are  calculated  according to
accounting methods that are standardized for all stock and bond funds.

Both yield and total return are based on historical results and are not intended
to indicate future performance.

Total return is calculated  separately for each class.  It includes not only the
effect of income  dividends but also any change in net asset value, or principal
amount,  during the stated period. The total return of a class shows its overall
change in value, including changes in share price and assuming all of the class'
dividends and capital gain  distributions  are  reinvested.  A cumulative  total
return reflects the class'  performance over a stated period of time. An average
annual total return  reflects the  hypothetical  annual  compounded  return that
would have produced the same cumulative total return if the performance had been
constant over the entire period.  Because  average annual returns tend to smooth
out variations in the returns,  you should  recognize that they are not the same
as actual year-by-year  results. Both types of total return usually will include
the effect of paying the front-end sales charge,  in the case of Class A shares.
Of course,  total  returns  will be higher if sales  charges  are not taken into
account.  Quotations of "overall  return" do not reflect  deduction of the sales
charge.  You should  consider  overall  return figures only if you qualify for a
reduced sales  charge,  or for purposes of comparison  with  comparable  figures
which also do not reflect sales charges,  such as mutual fund averages  compiled
by Lipper  Analytical  Services,  Inc.  Further  information  about  the  Fund's
performance  is contained  in its Annual  Report to  Shareholders,  which may be
obtained without charge.

MANAGEMENT OF THE FUND 

The Trust's Board of Trustees  supervises the Trust's activities and reviews its
contracts with companies that provide it with services
 .
Calvert U.S.  Government  Fund and Calvert Income Fund are series of The Calvert
Fund (the  "Trust"),  an  open-end  diversified  management  investment  company
organized as a Massachusetts  business trust on March 15, 1982. The other series
of the Fund are  Calvert  Strategic  Growth  Fund and  Calvert  Short-Term  U.S.
Government Fund.

The Trust 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 of a Fund you own.  For matters  affecting  only
one Fund,  only  shares of that Fund are  entitled  to vote.  Matters  affecting
classes differently,  such as Distribution Plans, will be voted on separately by
the affected class(es).

Portfolio Managers 

Investment  selections  for the Funds are made by Colleen M. Denzler and Stephen
N. Van Order.  Ms.  Denzler has been with the Calvert Group since 1986,  and has
been a member of the Portfolio Investment  Department since January 1987. She is
a member of the  Institute of Chartered  Financial  Analysts and the  Washington
Society of Investment  Analysts.  Mr. Van Order joined  Calvert Group in October
1992 as the head of the trading desk. He oversees the day-to-day investments and
operations of the  department and  participates  in setting market and portfolio
strategy. Previously, Mr. Van Order was Director of Long Term Funding at Federal
National  Mortgage  Association  (Fannie Mae). In his former  capacity,  Mr. Van
Order was  responsible  for Fannie Mae's long term borrowing  programs,  hedging
programs and debt marketing program.

Calvert  Group  is  one  of  the  largest  investment  management  firms  in the
Washington, D.C. area.

Calvert Group,  Ltd., parent of the Funds' investment  advisor,  transfer agent,
and  distributor,  is a subsidiary  of Acacia Mutual Life  Insurance  Company of
Washington, D.C. Calvert Group is one of the largest investment management firms
in the  Washington,  D.C. area.  Calvert Group,  Ltd. and its  subsidiaries  are
located at 4550 Montgomery Avenue, Suite 1000N, Bethesda,  Maryland 20814. As of
December 31, 1994,  Calvert Group managed and  administered  assets in excess of
$4.2 billion and more than 200,000 shareholder and depositor accounts.

Calvert Asset Management serves as Advisor to the Funds. 

Calvert Asset Management Company,  Inc. (the "Advisor") is the Funds' investment
advisor.  The  Advisor  provides  the  Funds  with  investment  supervision  and
management;  administrative  services and office space;  furnishes executive and
other personnel to the Funds; and pays the salaries and fees of all Trustees who
are  affiliated  persons of the  Advisor.  The  Advisor  may also assume and pay
certain advertising and promotional expenses of the Funds and reserves the right
to compensate  broker-dealers  in return for their promotional or administrative
services.  The  Advisor  has  agreed to limit the  Funds'  expenses  to the most
restrictive state limitation in effect.

The Advisor receives a fee based on a percentage of each Fund's assets. 

For its services  during the fiscal year ended  September 30, 1994,  the Advisor
was  entitled  pursuant to the  Investment  Advisory  Agreement,  to receive the
following  investment  advisory  fees as a percentage  of the Funds'  respective
average  daily net assets:  Calvert U.S.  Government  Fund,  0.60%;  and Calvert
Income Fund, 0.70%.

Calvert Distributors, Inc. serves as underwriter to market the Fund's shares. 

Effective  March 1,  1995,  Calvert  Distributors,  Inc.  ("CDI")  is the Fund's
principal  underwriter  and  distributor.  Under the  terms of its  underwriting
agreement  with the Fund, CDI markets and  distributes  the Fund's shares and is
responsible  for  payment of  commissions  and service  fees to  broker-dealers,
banks,  and financial  services  firms,  preparation  of  advertising  and sales
literature,  and printing and mailing of prospectuses to prospective  investors.
Prior  to  March 1,  1995,  Calvert  Securities  Corporation  was the  principal
underwriter.

The transfer agent keeps your account records. 

Calvert Shareholder Services,  Inc. is the Funds' transfer,  dividend disbursing
and shareholder servicing agent.

SHAREHOLDER GUIDE 

Opening An Account 

You can buy shares of the Funds in several ways which are described  here and in
the chart below.

An account  application  accompanies  this  prospectus.  A completed  and signed
application is required for each new account you open,  regardless of the method
you choose for making your initial investment.  Additional forms may be required
from  corporations,  associations,  and  certain  fiduciaries.  If you  have any
questions  or need extra  applications,  call your broker,  or Calvert  Group at
800-368-2748. Be sure to specify which class you wish to purchase.

To invest in any of Calvert's tax-deferred retirement plans, please call Calvert
Group  at  800-368-2748  to  receive   information  and  the  required  separate
application.

Alternative Sales Options 

Each Fund offers two classes of shares: 

Class A Shares - Front End Load Option 

Class A shares are sold with a front-end  sales  charge at the time of purchase.
Class A shares are not subject to a sales charge when they are redeemed.

Class C shares - Level Load Option 

Class C shares  are sold  without  a sales  charge  at the time of  purchase  or
redemption.

Class C shares have higher expenses 

Each Fund bears some of the costs of selling its shares under Distribution Plans
adopted  with  respect to its Class A and Class C shares  pursuant to Rule 12b-1
under the 1940 Act.  Payments under the Class A Distribution Plan are limited to
a maximum of 0.50%  annually  of the  average  daily net asset  value of Class A
shares  for  Calvert  Income  Fund  (0.25%  for U.S.  Government).  The  Class C
Distribution Plan provides for the payment of an annual  distribution fee to CDI
of up to 0.75%,  plus a service fee of up to 0.25%,  for a total of 1.00% of the
average daily net assets attributable to their respective classes.

Considerations for deciding which class of shares to buy 

Income  distributions  for Class A shares will probably be higher than those for
Class C shares, as a result of the distribution  expenses  described above. (See
also "Total  Return.") You should  consider  Class A shares if you qualify for a
reduced sales charge under Class A or if you plan to hold the shares for several
years.

Class A Shares 

Class A shares are offered at net asset value plus a front-end  sales  charge as
follows:

<TABLE>
<CAPTION>

Amount of Investment          As a % of            As a % of     Concession to 
                              Offering             Net Amount      Dealers  
                              Price                Invested        as a % of 
                                                                 Amount Invested 
<S>                           <C>                   <C>               <C>   

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%             0.25%* 

*For new  investments  (new purchases but not exchanges) of $1 million or more a
broker-dealer will have the choice of being paid a finder's fee by CDI in one of
the following methods: (1) CDI may pay broker-dealer,  on a monthly basis for 12
months,  an annual rate of 0.30%.  Payments  will be made monthly at the rate of
0.025% of the amount of the  investment,  less  redemptions;  or (2) CDI may pay
broker-dealers  0.25% of the amount of the purchase;  however,  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 Fund within  thirteen  months of the
time of purchase.
</TABLE>


Sales charges on Class A shares may be reduced or  eliminated in certain  cases.
See Exhibit A to this prospectus.

The sales charge is paid to CDI,  which in turn  normally  reallows a portion to
your  broker-dealer.  Upon  written  notice to  dealers  with whom it has dealer
agreements,  CDI may reallow up to the full applicable sales charge.  Dealers to
whom  substantially  the entire sales  charge is  reallowed  may be deemed to be
underwriters under the Securities Act of 1933.

In addition to any sales charge reallowance or finder's fee, your broker-dealer,
or other  financial  service firm through which your account is held,  currently
will be paid  periodic  service  fees at an  annual  rate of up to  0.25% of the
average  daily net asset value of Class A shares held in accounts  maintained by
that firm.

Class A Distribution Plan 

Each Fund has  adopted a  Distribution  Plan with  respect to its Class A shares
(the "Class A  Distribution  Plan"),  which  provides  for payments at a maximum
annual rate of 0.25% of the  average  daily net asset value of Class A shares of
U.S.  Government Fund (0.50% of Calvert Income Fund), to pay expenses associated
with the distribution and servicing of Class A shares.  Amounts paid by the Fund
to CDI  under  the  Class A  Distribution  Plan are used to pay to  dealers  and
others,  including CDI  salespersons  who service  accounts,  service fees at an
annual  rate of up to 0.25% of the  average  daily  net  asset  value of Class A
shares, and to pay CDI for its marketing and distribution  expenses,  including,
but not limited to,  preparation  of  advertising  and sales  literature and the
printing and mailing of prospectuses to prospective investors. During the fiscal
year ended September 30, 1994, Class A Distribution Plan expenses for the Income
and U.S. Government Funds were 0.06% and 0.09%, respectively.

Each of the  Distribution  Plans  may be  terminated  at any time by vote of the
Independent  Trustees or by vote of a majority of the outstanding  voting shares
of the respective class.

Class C Shares 

Class C shares are not available through all dealers. Class C shares are offered
at net asset value,  without a front-end  sales charge or a contingent  deferred
sales charge. Class C expenses are higher than those of Class A.

Class C Distribution Plan 

Each Fund has  adopted a  Distribution  Plan with  respect to its Class C shares
(the "Class C Distribution Plan"), which provides for payments at an annual rate
of up to 1.00% of the average  daily net asset  value of Class C shares,  to pay
expenses of the  distribution  and servicing of Class C shares.  Amounts paid by
the Fund under the Class C  Distribution  Plan are currently  used by CDI to pay
dealers and other selling firms dealer-paid quarterly  compensation at an annual
rate of up to 0.75%,  plus a service  fee, as  described  above  under  "Class A
Distribution Plan," of up to 0.25%, of the average daily net asset value of each
share sold by such others. For the fiscal year ended September 30, 1994, Class C
Distribution  Plan  expenses  were  1.00%  and  1.00%  for the  Income  and U.S.
Government Funds, respectively.

Arrangements with Broker-Dealers and Others 

CDI  may  also  pay  additional  concessions,   including  non-cash  promotional
incentives,  such as  merchandise  or trips,  to  dealers  employing  registered
representatives who have sold or are expected to sell a minimum dollar amount of
shares of the Fund and/or  shares of other Funds  underwritten  by CDI.  CDI may
make  expense  reimbursements  for  special  training  of a dealer's  registered
representatives,  advertising  or equipment,  or to defray the expenses of sales
contests.  Eligible marketing and distribution  expenses may be paid pursuant to
the Fund's Rule 12b-1 Distribution Plan.

Dealers or others may receive  different  levels of  compensation  depending  on
which class of shares they sell.  Payments  pursuant to a Distribution  Plan are
included in the operating expenses of the class.

HOW TO BUY SHARES 
(BE SURE TO SPECIFY WHICH CLASS YOU ARE BUYING) 

Method          New Accounts                    Additional Investments 

By Mail         $2,000 minimum                  $250 minimum 

                Please make your check          Please make your check   
                payable to the Fund of          payable to the Fund of  
                your choice and mail it         your choice and mail it  
                with your application to:       with your investment slip to: 


These addresses    Calvert Group                     Calvert Group 
effective          P.O. Box 419544                   P.O. Box 419739 
April 1, 1995      Kansas City, MO 64179-6542        Kansas City, MO 64105-6739 

By Registered, Certified, or Overnight Mail:         Calvert Group 
                                                     c/o NFDS, 6th Floor 
                                                     1004 Baltimore 
                                                     Kansas City, MO 64105-1807 

Through Your 
Broker          $2,000 minimun                  $250 minimum 

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

FOR ALL OPTIONS BELOW, PLEASE CALL YOUR BROKER, OR CALVERT GROUP AT
800-368-2745

By Exchange     $2,000 minimum                  $250 minimum 
(From your account in another Calvert Group Fund) 

When opening an account by exchange,  your new account must be established  with
the same name(s),  address and taxpayer  identification  number as your existing
Calvert account.

By Bank Wire     $2,000 minimun                 $250 minimum 

By Calvert Money      Not Available for         $50 minimum 
Controller*           initial Investment 

*Please allow  sufficient time for Calvert Group to process your initial request
for this service,  normally 10 business days. The maximum  transaction amount is
$300,000, and your purchase request must be received by 4:00 p.m. Eastern time.

NET ASSET VALUE 

Net asset  value  per share  ("NAV)"  refers to the worth of one  share.  NAV is
computed  by adding the value of all  portfolio  holdings,  plus  other  assets,
deducting  liabilities  and then  dividing  the  result by the  number of shares
outstanding.  The NAVs of each class will vary daily based on the market  values
of the Funds' respective investments.

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

The NAV for each Fund is  calculated  at the close of the Fund's  business  day,
which  coincides  with the closing of the regular  session of the New York Stock
Exchange  (normally 4:00 p.m.  Eastern time). The Fund is open for business each
day the New York Stock  Exchange is open.  All  purchases of Fund shares will be
confirmed and credited to your account in full and fractional shares (rounded to
the nearest 1/1000 of a share).

WHEN YOUR ACCOUNT WILL BE CREDITED 

Before you buy shares,  please read the following  information to make sure your
investment is accepted and credited properly.

Your purchase will be processed at the next offering price based on the next net
asset  value  calculated  after your order is  received  and  accepted.  If your
purchase is received by 4:00 p.m. Eastern time, your account will be credited on
the day of receipt.  If your purchase is received after 4:00 p.m.  Eastern time,
it will be credited the next business  day. All  purchases  must be made in U.S.
dollars and checks must be drawn on U.S.  banks.  No cash 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.  If your check does not clear,  your
purchase will be cancelled and you will be charged a $10 fee plus costs incurred
by the Fund.  When you purchase by check or with Calvert Money  Controller,  the
Fund can hold payment on redemptions  until it is reasonably  satisfied that the
investment is collected  (normally 10 business  days).  To avoid this collection
period, you can wire federal funds from your bank, which may charge you a fee.

Certain financial institutions or broker-dealers which have entered into a sales
agreement with the Distributor may enter confirmed  purchase orders on behalf of
customers by phone,  with payment to follow within a number of days of the order
as specified by the program.  If payment is not received in the time  specified,
the financial institution could be held liable for resulting fees or losses.

EXCHANGES 

You may exchange shares of the Fund for shares of other Calvert Group Funds. 

If your investment goals change, the Calvert Group Family of Funds has a variety
of investment  alternatives  that includes  common stock funds,  tax-exempt  and
corporate  bond funds,  and money  market  funds.  The  exchange  privilege is a
convenient way to buy shares in other Calvert Group Funds in order to respond to
changes  in your  goals or in market  conditions.  However,  to protect a Fund's
performance and to minimize costs,  Calvert Group discourages frequent exchanges
and may prohibit  additional  purchases of Fund shares by persons engaged in too
many  short-term  trades.  Before you make an exchange from a Fund or Portfolio,
please note the following:

Call your broker or a Calvert  representative  for  information and a prospectus
for any of Calvert's other Funds  registered in your state.  Read the prospectus
of the  Fund  or  Portfolio  into  which  you  want  to  exchange  for  relevant
information, including class offerings.

Shares of a particular class of the Fund may be exchanged only for shares of the
same class of another  Calvert Fund,  except that any class may be exchanged for
Class A shares of any Calvert money market fund.

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 on the
transaction.

Complete  and sign an  application  for an  account  in that Fund or  Portfolio,
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.

Shares on which you have already paid a sales charge at Calvert Group and shares
acquired by  reinvestment  of dividends or  distributions  may be exchanged into
another Fund at no additional charge.

Shareholders (and those managing  multiple  accounts) who make two purchases and
two  exchange  redemptions  of shares of the same  Portfolio  during any 6-month
period  will be given  written  notice that they may be  prohibited  from making
additional  investments.  This  policy  does not  prohibit  a  shareholder  from
redeeming  shares of the Fund,  and does not apply to trades  solely among money
market funds.

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

OTHER CALVERT GROUP SERVICES 

Calvert Information Network 

24 hour yield and prices  

Calvert  Group  has a  round-the-clock  telephone  service  that  lets  existing
customers use a push button phone to obtain prices, yields and account balances.
Complete  instructions  for  this  service  may be  found  on the  back  of each
statement.

Calvert Money Controller 

Calvert Money Controller  eliminates the delay of mailing a check or the expense
of wiring funds. You can request this free service on your application.

This service allows you to authorize  electronic  transfers of money to purchase
or sell shares.  You use Calvert Money Controller like an "electronic  check" to
move money ($50 to $300,000)  between  your bank account and your Calvert  Group
account with one phone call.  Allow one or two business  days after the call for
the  transfer to take place;  for money  recently  invested,  allow normal check
clearing time (up to 10 business  days) before  redemption  proceeds are sent to
your bank.

You may also arrange systematic monthly or quarterly  investments  (minimum $50)
into your Calvert Group account.  After you give us proper  authorization,  your
bank account will be debited to purchase Fund shares.  A debit entry will appear
on your bank statement.  Share  purchases made through Calvert Money  Controller
will be  subject  to the  applicable  sales  charge.  If you would  like to make
arrangements for systematic  monthly or quarterly  redemptions from your Calvert
Group  account,  call  your  broker  or  Calvert  Group  for a Money  Controller
Application.

Telephone Transactions 

Calvert may record all telephone calls. 

If you have  telephone  transaction  privileges,  you may purchase,  redeem,  or
exchange shares,  wire funds and use Calvert Money Controller by telephone.  You
automatically  have telephone  privileges unless you elect otherwise.  The Fund,
the transfer agent and their  affiliates are not liable for acting in good faith
on  telephone  instructions  relating  to your  account,  so long as they follow
reasonable procedures to determine that the telephone  instructions are genuine.
Such  procedures  may include  recording the telephone  calls and requiring some
form of personal  identification.  You should  verify the  accuracy of telephone
transactions immediately upon receipt of your confirmation statement.

Optional Services 

Complete  the  "Option"  sections  of the  application  for the  easiest  way to
establish services.

The easiest way to establish  optional services on your Calvert Group account is
to select the options you desire when you complete your account application.  If
you wish to add other options later,  you may have to provide us with additional
information and a signature guarantee. Please call Calvert Investor Relations at
800-368-2745 for further assistance. For our mutual protection, we may require a
signature  guarantee  on  certain  written  transaction  requests.  A  signature
guarantee verifies the authenticity of your signature,  and may be obtained from
any  bank,   savings  and  loan  association,   credit  union,   trust  company,
broker-dealer firm or member of a domestic stock exchange. A signature guarantee
cannot be provided by a notary public.

Householding of General Mailings 

You can help in an effort to reduce Fund  expenses  and save paper and trees for
the environment.

If you have multiple accounts with Calvert, you may receive combined mailings of
some  shareholder  information,  such as semi-annual and annual reports.  Please
contact Calvert Investor  Relations at 800-368-2745 to receive additional copies
of information.

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  research  fee for  these  special
services.

If you are purchasing  shares of the Fund through a program of services  offered
by a  broker-dealer  or  financial  institution,  you  should  read the  program
materials in conjunction with this Prospectus.  Certain features may be modified
in  these  programs,   and   administrative   charges  may  be  imposed  by  the
broker-dealer or financial institution for the services rendered.

Tax-Saving Retirement Plans 

Contact Calvert Group for complete  information  kits discussing the plans,  and
their benefits, provisions and fees.

Calvert Group can set up your new account under one of several tax-deferred
plans. These plans let you invest for retirement and shelter your
investment income from current taxes. Minimums may differ from those listed
in the chart on page _____. Also, reduced sales charges may apply. See
"Exhibit A - Reduced Sales Charges."

Individual retirement accounts (IRAs): available to anyone who has earned
income. You may also be able to make investments in the name of your
spouse, if your spouse has no earned income. Qualified Profit-Sharing and
Money-Purchase Plans (including 401(k) Plans): available to self-employed
people and their partners, or to corporations and their employees.

Simplified Employee Pension Plan (SEP-IRA): available to self-employed people
and their partners, or to corporations.  Salary reduction pension plans (SAR-SEP
IRAs) are also available to employers with 25 or fewer employees.

403(b)(7)  Custodial  Accounts:   available  to  employees  of  most  non-profit
organizations and public schools and universities.

SELLING YOUR SHARES 

You may redeem all or a portion of your shares on any business  day. Your shares
will be redeemed at the next net asset value  calculated  after your  redemption
request is received and accepted.  See the chart below for specific requirements
necessary to make sure your redemption request is acceptable.  Remember that the
Fund may hold payment on the  redemption  of your shares until it is  reasonably
satisfied that  investments  made by check or by Calvert Money  Controller  have
been collected (normally up to 10 business days).

Redemption Requirements To Remember 

To ensure  acceptance of your redemption  request,  please follow the procedures
described here and below.

Once your shares are redeemed,  the proceeds will normally be sent to you on the
next business day, but if making  immediate  payment could adversely  affect the
Fund,  it may take up to seven (7) days.  Calvert Money  Controller  redemptions
generally will be credited to your bank account on the first or second  business
day after your phone call.  When the New York Stock  Exchange 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.

Minimum account balance is $1,000 per Fund. 

Please  maintain a balance  in your  account  of at least  $1,000 per Fund,  per
class.  If, due to redemptions,  the account falls below $1,000,  or you fail to
invest at least  $1,000,  your account may be closed and the proceeds  mailed to
you at the address of record. You will be given notice that your account will be
closed after 30 days unless you make an  additional  investment to increase your
account balance to the $1,000 minimum.

HOW TO SELL YOUR SHARES 

By Mail To: 

Calvert Group 
4550 Montgomery Ave. 
Bethesda, MD  20814 

Effective 4/1/95: 
Calvert Group 
P.O. Box 419544 
Kansas City, MO  
64179-6542 

You may  redeem  available  shares  from your  account  at any time by sending a
letter of instruction,  including your name, account and Fund number, the number
of shares or dollar amount, and where you want the money to be sent.  Additional
requirements,  below, may apply to your account.  The letter of instruction must
be signed by all required  authorized signers. If you want the money to be wired
to a bank not previously  authorized,  then a voided bank check must be enclosed
with your  letter.  If you do not have a voided check or if you would like funds
sent to a different  address or another  person,  your letter must be  signature
guaranteed.

Type of Registration           Requirements 

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

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

By Telephone 

Please call  800-368-2745.  You may redeem shares from your account by telephone
and have your money  mailed to your  address of record or wired to an address or
bank you have previously authorized. A charge of $5 is imposed on wire transfers
of less than $1,000. See "Telephone Transactions" on page ___.

Calvert Money Controller 

Please allow  sufficient  time for Calvert Group to process your initial request
for this service  (normally 10 business days). You may also authorize  automatic
fixed amount  redemptions  by Calvert  Money  Controller.  All requests  must be
received by 4:00 p.m. (Eastern time). Accounts cannot be closed by this service.

Exchange to Another Calvert Group Fund 

You must meet the minimum investment requirement of the other Calvert Group Fund
or Portfolio.  You can only exchange  between  accounts  with  identical  names,
addresses and taxpayer  identification number, unless previously authorized with
a signature-guaranteed letter.

Systematic Check Redemptions 

If you  maintain  an account  with a balance  of  $10,000 or more,  you may have
regular  checks for a fixed  amount sent to you on the 15th of each month simply
by sending a letter with all the 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.

Through your Broker 

If your  account  is held in your  broker's  name  ("street  name"),  you should
contact your broker directly to transfer, exchange or redeem shares.

DIVIDENDS, CAPITAL GAINS AND TAXES 

Each year, the Funds distribute substantially all of their net investment income
and capital gains to shareholders.

Dividends  from the Funds' net  investment  income  are  declared  and paid on a
monthly  basis.  Net  investment  income  consists of the interest  income,  net
short-term   capital  gains,  if  any,  and  dividends   declared  and  paid  on
investments,  less expenses.  Distributions of the Funds' net short-term capital
gains  (treated as dividends for tax  purposes)  and its net  long-term  capital
gains, if any, are normally declared and paid by the Fund 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  and
distribution payments will vary between classes; dividend payments are generally
anticipated to be higher for Class A shares.

Dividend and Distribution Payment Options. 

Dividends  and  any  distributions  are  automatically  reinvested  in the  same
Portfolio  at net asset  value (no sales  charge),  unless you elect to have the
dividends of $10 or more paid in cash (by check or by Calvert Money Controller).
Dividends and  distributions  may be  automatically  invested in an  identically
registered  account with the same account number in any other Calvert Group Fund
at net asset value.  If reinvested in the same Fund account,  new shares will be
purchased at net asset value on the reinvestment date, which is generally 1 to 3
days prior to the payment date. You must notify the Fund in writing prior to the
record  date to change  your  payment  options.  If you elect to have  dividends
and/or  distributions  paid in cash, and the U.S.  Postal Service cannot deliver
the  check,  or if it remains  uncashed  for six  months,  it, as well as future
dividends and distributions, will be reinvested in additional shares.

"Buying a Dividend" 

At the time of purchase,  the share price of the Fund 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,  the Fund's  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 

In January,  the Funds will mail you Form  1099-DIV  indicating  the federal tax
status of  dividends  and capital  gain  distributions  paid to you by the Funds
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 three  months  prior  are  taxable  in the year  declared.
Dividends and  distributions  are taxable to you  regardless of whether they are
taken in cash or reinvested.  Dividends, including short-term capital gains, are
taxable as ordinary  income.  Distributions  from  long-term  capital  gains are
taxable as long-term  capital gains,  regardless of how long you have owned Fund
shares.

You may realize a capital gain or loss when you sell or exchange shares. 

If you sell or  exchange  your Fund  shares  you will have a short or  long-term
capital  gain or loss,  depending  on how long you owned the  shares  which were
sold. In January, the Funds will mail you Form 1099-B indicating the date of and
proceeds  from 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 

In addition to federal taxes, you may be subject to state or local taxes on your
investment,  depending  on the laws in your area.  You will be  notified  to the
extent, if any, that dividends  reflect interest  received from U.S.  government
securities. 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 the
Funds to withhold 31% of your  dividends and certain  redemptions.  In addition,
you may be subject to a fine. 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 at the current
NAV on the date of  redemption.  The Funds  reserve  the right to reject any new
account or any purchase order for failure to supply a certified TIN.

EXHIBIT A 

REDUCED SALES CHARGES (CLASS A ONLY) 

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.

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

Letter of Intent.  If you plan to  purchase  $50,000 or more of 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 fund 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 Statement of
Additional Information.

Group  Purchases.  If you are a member of a qualified  group,  you may  purchase
shares of the Fund at the reduced sales charge  applicable to the group taken as
a whole.  The sales  charge is  calculated  by taking into  account not only the
dollar amount of the shares you purchase, but also the higher of cost or current
value of shares previously purchased and currently held by other members of your
group.

A  "qualified  group" is one which (i) has been in  existence  for more than six
months,  (ii) has a purpose other than acquiring Fund shares at a discount,  and
(iii)  satisfies  uniform  criteria  which enable CDI and dealers  offering Fund
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  dealers  distributing  the Fund's
shares,  must agree to include sales and other materials  related to the Fund in
its  publications  and  mailings  to  members  at  reduced  or no cost to CDI or
dealers,  and  must  seek  to  arrange  for  payroll  deduction  or  other  bulk
transmission of investments to the Fund.

Pension plans may not qualify  participants for group purchases;  however,  such
plans may qualify for reduced  sales  charges  under a separate  provision  (see
below). Members of a group are not eligible for a Letter of Intent.

Retirement Plans Under Section 457, Section 403(b)(7),  or Section 401(k). There
is no sales  charge on shares  purchased  for the benefit of a  retirement  plan
under Section 457 of the Internal Revenue Code of 1986, as amended ("Code"),  or
for a plan  qualifying  under  Section  403(b)(7) of the Code if, at the time of
purchase, Calvert Group has been notified in writing that the 403(b)(7) plan has
at least 200 eligible employees. Furthermore, there is no sales charge on shares
purchased for the benefit of a retirement plan  qualifying  under Section 401(k)
of the Code if, at the time of such purchase,  the 401(k) plan administrator has
notified  Calvert  Group in  writing  that a) its  401(k)  plan has at least 200
eligible  employees;  or b) the cost or current  value of shares the plan has in
Calvert Group of Funds (except money market funds) is at least $1 million.

Neither the Fund,  nor 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.

Other  Circumstances.  There is no sales charge on shares of any fund (portfolio
or series) of the Calvert Group of Funds sold to (i) current and retired members
of the Board of  Trustees/Directors  of the  Calvert  Group of  Funds,  (and the
Advisory  Council  of the  Calvert  Social  Investment  Fund);  (ii)  directors,
officers  and  employees  of the  Advisor,  Distributor,  and  their  affiliated
companies;  (iii) directors,  officers and registered representatives of brokers
distributing  the Fund's shares;  and immediate family members of persons listed
in (i), (ii), and (iii), above; (iv) dealers,  brokers, or registered investment
advisors that have entered into an agreement with CDI providing specifically for
the use of shares of the Fund  (Portfolio  or Series) in  particular  investment
programs or products  (where such  program or product  already has a fee charged
therein)  made  available to the clients of such dealer,  broker,  or registered
investment advisor;  and (v) trust departments of banks or savings  institutions
for trust clients of such bank or savings institution.

Established  Accounts.  Shares of Calvert  Income  Fund may be sold at net asset
value to accounts opened on or before January 12, 1987.

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.  Dividends and distributions from Calvert Group money market funds
used to purchase shares of the Fund will not be subject to the applicable  sales
charge, effective April 1, 1995.

Reinstatement  Privilege.  If you redeem  Fund  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 Fund reserves the right to
modify or eliminate this privilege.

Redemptions  From Other Mutual Funds. You may purchase shares of the above funds
at net asset  value,  without  sales  charge,  to the extent  that the  purchase
represents proceeds from a redemption (within the previous 60 days) of shares of
another  mutual  fund.  When  making a purchase  at net asset  value  under this
provision,  the Fund or Portfolio  must receive one of the  following  with your
direct purchase order: (i) the redemption check representing the proceeds of the
shares redeemed,  endorsed to the order of the Fund or Portfolio, or (ii) a copy
of the  confirmation  from the other fund,  showing the redemption  transaction.
Standard  back office  procedures  should be followed for wire order  purchases.
Purchases  with  redemptions  from money  market funds are not eligible for this
privilege.  This provision is effective  through March 15, 1995 only, but may be
extended at the discretion of the Distributor.

================================================================================
To Open an Account:                               Prospectus 
800-368-2748                                     January 31, 1995 

Yields and Prices: 
Calvert Information Network                      THE CALVERT FUND 
24 hours, 7 days a week 
800-368-2745 
                                                 Calvert U.S. Government Fund 
Service for Existing Account: 
Shareholders             800-368-2745            Calvert Income Fund 
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 
4550 Montgomery Avenue 
Suite 1000N 
Bethesda, Maryland 20814 

Effective April 1, 1995: 
Calvert Group 
c/o NFDS, 6th Floor 
1004 Baltimore 
Kansas City, MO 64105-1807 

PRINCIPAL UNDERWRITER 
Calvert Distributors, Inc. (effective 3/1/95) 
4550 Montgomery Avenue 
Suite 1000N 
Bethesda, Maryland 20814 

Table of Contents 

Fund Expenses 
Financial Highlights 
Investment Objectives and Policies 
Yield and Total Return 
Management of the Fund 
SHAREHOLDER GUIDE: 
Alternative Sales Options 
How to Buy Shares 
Net Asset Value 
When Your Account Will Be Credited 
Exchanges 
Other Calvert Group Services 
Selling Your Shares 
How to Sell Your Shares 
Dividends, Capital Gains and Taxes 
Exhibit A - Reduced Sales Charges 





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