PARNASSUS INCOME FUND
497, 1997-12-09
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<TABLE>
<CAPTION>


                            THE PARNASSUS INCOME FUND
                              Cross Reference Index
<S>      <C>                                <C>

         ITEM                               REFERENCE

Part A.  Information Required in a Prospectus

Item 1.  Cover Page                         Cover Page
Item 2.  Synopsis; Fee Information          Fund Expenses (p.2)
Item 3.  Financial Highlights               Financial Highlights (p.3)
Item 4.  General Description of             Investment Objective (p.5)
         Registrant                         Other Investment Policies (p.10);
                           General Information (p.19)
Item 5.  Management of the Fund             Management (p.13); The Adviser(p.14)
                           General Information (p.19)
Item 6.  Capital Stock and other            Dividends and Taxes (p.17);
         Securities                         How to Purchase Shares (p.14)
                                            Management (p.13)
Item 7.  Purchase of Securities Being       How to Purchase Shares (p.14)
         Offered
Item 8.  Redemption or Repurchase           How to Redeem Shares (p.16)
   
Item 9.  Legal Proceedings                  None
    
Part B   Information Required in a Statement of Additional Information

Item 10. Cover Page                         Cover Page (B-1)
Item 11. Table of Contents                  Table of Contents (B-1)
Item 12. General Information & History      General (B-14)
Item 13. Investment Objective & Policies    Investment Objectives
                                & Policies (B-2)
Item 14. Management of the Registrant       Management (B-8)
Item 15. Control Person & Principal         Control Persons (B-9)
              Holders of Securities
Item 16. Investment Advisory & Other        The Adviser (B-11)
              Services
Item 17. Brokerage Allocation & Other       The Adviser (B-11); Portfolio
              Practices                     Transactions and Brokerage (B-11)
Item 18. Capital Stock & Other Securities   General (B-14)
Item 19. Purchase, Redemption & Pricing     Net Asset Value (B-13)
              of Securities Being Offered
Item 20. Tax Status                         Prospectus (p.17)
Item 21. Underwriters                       Portfolio Transactions and
                                            Brokerage (B-11)
Item 22. Calculation of Performance Data    Performance Advertising and
                                            Calculation of Total Return
                                            and Yield (B-10); Yield of
                                            Fixed-Income and California
                                            Tax-Exempt Portfolio (B-10);
                                            Effective Yield (B-10)
Item 23. Financial Statements               Financial Statements (B-15)
</TABLE>

<PAGE>

THE PARNASSUS INCOME FUND
   
PROSPECTUS-MAY 1, 1997 AS REVISED DECEMBER 8, 1997
    

   The Parnassus Income Fund (the "Fund") is a "no load," diversified,  open-end
series  management  investment  company  managed by Parnassus  Investments  (the
"Adviser").  The  Adviser  chooses  the Fund's  investments  for all  portfolios
according to social  standards  described in this  Prospectus.  In general,  the
Adviser will choose  investments  that it believes  will have a positive  social
impact.

   The Fund has three portfolios.  The Balanced Portfolio invests in both stocks
and bonds and its investment objective is both current income and capital gains.
The Fixed-Income  Portfolio  invests  primarily in bonds and other  fixed-income
investments and its investment  objective is current income and  preservation of
capital. The California Tax-Exempt Portfolio (for California residents only) has
as its  investment  objective a high level of current income exempt from federal
and  California   personal  income  taxes  consistent  with  prudent  investment
management.

   This  Prospectus  provides  you with the basic  information  you should  know
before  investing  in the  Fund.  You  should  read it and  keep  it for  future
reference.  A  Statement  of  Additional  Information  (SAI)  dated  May 1, 1997
containing  additional  information  about  the  Fund has  been  filed  with the
Securities  and Exchange  Commission  and is  incorporated  by reference in this
Prospectus in its entirety. You may obtain a copy of the Statement of Additional
Information without charge by calling the Fund at (800) 999-3505.


TABLE OF CONTENTS
- -------------------------------------------------------------------------------
Fund Expenses                        2     Management                        13
Financial Highlights                 3     The Adviser                       14
The Legend of Mt. Parnassus          4     How to Purchase Shares            14
Investment Objective and Policies    5     How to Redeem Shares              16
Other Investment Policies           10     Dividends and Taxes               17
Performance Information             11     General Information               19

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



<PAGE>


FUND EXPENSES

The following table  illustrates all expenses and fees that a shareholder of the
Fund will incur.

   SHAREHOLDER TRANSACTION EXPENSES
   -----------------------------------------------------------------------------
                                                                      CALIFORNIA
                                             BALANCED   FIXED-INCOME  TAX-EXEMPT
                                             PORTFOLIO    PORTFOLIO    PORTFOLIO
   -----------------------------------------------------------------------------
   Maximum Sales load Imposed on Purchases
       (as a percentage of offering price)     None         None         None
   Redemption Fees                             None         None         None


   ANNUAL FUND OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE NET ASSETS)
   ----------------------------------------------------------------------------
   Management Fees (after fee waiver)           0.50%       0.10%        0.20%
   12b-1 Fees                                   None        None         None
   Other expenses (after expense reimbursement) 0.65%       0.83%        0.51%
   Total Fund Operating Expenses                1.15%*      0.93%*       0.71%*


   The  purpose of this table is to assist the  investor  in  understanding  the
various costs and expenses that a shareholder  in the Fund will bear directly or
indirectly. The following example illustrates the expenses that you would pay on
a $1000  investment  over various time periods  assuming (1) a 5% annual rate of
return and (2) redemption at the end of each time period.  As noted in the table
above, the Fund charges no redemption fees of any kind.


                    ONE YEAR THREE YEARS FIVE YEARS TEN YEARS
                                    --------  -----------  ----------  ---------
   Balanced Portfolio                 $12        $37          $63        $140
   Fixed-income Portfolio               9         30           51         114
   California Tax-Exempt Portfolio      7         23           40          88

   The expenses  shown above are  cumulative--not  ones you pay every year.  For
example,  the $140 figure for ten years with the  Balanced  Portfolio is not the
annual expense,  but the total cumulative expenses a shareholder would have paid
for the  entire  ten-year  period.  This  example  should  not be  considered  a
representation of past or future expenses or performance. Actual expenses may be
greater or less than those shown.

   From time to time,  the Fund may direct  brokerage  commissions to firms that
may pay certain  expenses of the Fund subject to "best  execution." This is done
only  when  brokerage  costs are  reasonable  and the Fund  determines  that the
reduction of expenses is in the best interest of the shareholders. See page B-11
of the SAI for more  information.  Since this happens on an irregular basis, the
effect on the expense ratios cannot be calculated with any degree of certainty.


   * The Fund  compensates  Parnassus  Investments  for its services as Transfer
Agent and Accounting Agent in the form of fixed fees, which are not based upon a
percentage  of the  average  net assets of the Fund.  The  Adviser has agreed to
reduce its  management  fee to the extent  necessary  to limit  total  operating
expenses  to 1.25% of net assets  for the  Balanced  Portfolio  and 1.00% of net
assets for the  Fixed-Income  and California  Tax-Exempt  Portfolios.  For 1996,
Parnassus  Investments  reduced  its fees and  reimbursed  expenses  so that the
expense  ratios  were even lower than  these  limits.  Had there been no expense
reimbursement or fee waiver, total expense ratios for the Balanced, Fixed-Income
and  California  Tax-Exempt  Portfolios  would have been 1.40%,  1.33% and 1.00%
respectively.

<PAGE>

<TABLE>


FINANCIAL HIGHLIGHTS
- -------------------------------------------------------------------------------------------------------------
<CAPTION>
   Selected data for each share of capital stock outstanding,  total return and ratios/supplemental data
the years ended December 31, 1996,  1995,  1994, 1993 and seven month period ended December 31, 1992 are
as follows:
- -------------------------------------------------------------------------------------------------------------
Balanced Portfolio                           1996           1995           1994           1993           1992
- -------------------------------------------------------------------------------------------------------------
<S>                                         <C>            <C>            <C>            <C>            <C>
Net asset value at beginning of period      $19.58         $15.70         $17.46         $16.17         $0.00
                                             -----          -----          -----          -----         -----
INCOME FROM INVESTMENT OPERATIONS:
   Net investment income                      0.98           0.88           0.80           1.20          0.17
   Net realized and unrealized gain
               (loss) on securities           0.37           3.93          (1.75)          1.36         16.15
                                             -----          -----          -----          -----         -----
     Total from investment operations         1.35           4.81          (0.95)          2.56         16.32
                                             -----          -----          -----          -----         -----
DISTRIBUTIONS:
   Dividends from net investment income      (0.97)         (0.90)         (0.81)         (1.21)        (0.15)
   Distributions from net realized gain
                       on securities         (1.40)         (0.03)          0.00          (0.06)         0.00
                                             -----          -----          -----          -----         -----
    Total distributions                      (2.37)         (0.93)         (0.81)         (1.27)        (0.15)
                                             -----          -----          -----          -----         -----
Net asset value at end of period            $18.56         $19.58         $15.70          $17.46       $16.17
                                             -----          -----          -----          ------        -----
TOTAL RETURN *                               7.09%          31.13%        (5.39%)         15.91%        8.58%

RATIOS/SUPPLEMENTAL DATA:
  Ratio of expenses to average net
                 assets (actual)**           0.80%           0.72%         0.83%           0.81%        0.00%
  Decrease reflected in the above
     expense ratios due to undertakings
     by Parnassus Investments                0.60%           0.82%         0.88%           1.24%        1.14%
  Ratio of net investment income to
     average net assets                      4.56%           4.76%         5.15%           4.94%        2.44%
   Portfolio turnover rate                  47.80%          15.36%         6.50%          33.40%       23.54%
Average commission per share***             $0.069            .-             .-             .-            .-
Net assets, end of period (000's)          $33,362         $26,779       $17,087         $11,542       $3,241


- -------------------------------------------------------------------------------------------------------------
Fixed-Income Portfolio                       1996           1995           1994           1993           1992
- -------------------------------------------------------------------------------------------------------------
Net asset value at beginning of period      $15.73         $13.79         $15.89         $15.33         $0.00
                                             -----          -----          -----          -----         -----
INCOME FROM INVESTMENT OPERATIONS:
   Net investment income                      0.92           0.95           1.02           1.03          0.36
   Net realized and unrealized gain
     (loss) on securities                    (0.31)          1.95          (2.08)          0.57         15.32
                                             -----          -----          -----          -----         -----
     Total from investment operations         0.61           2.90          (1.06)          1.60         15.68
                                             -----          -----          -----          -----         -----
DISTRIBUTIONS:
  Dividends from net investment income       (0.91)         (0.96)         (1.04)         (1.03)        (0.35)
  Distributions from net realized
    gain on securities                        0.00           0.00           0.00          (0.01)         0.00
                                             -----          -----          -----          -----         -----
    Total distributions                      (0.91)         (0.96)         (1.04)         (1.04)        (0.35)
                                             -----          -----          -----          -----         -----
Net asset value at end of period            $15.43         $15.73         $13.79         $15.89        $15.33
                                             -----          -----          -----          -----         -----
TOTAL RETURN *                               4.08%         21.58%         (6.76%)        10.59%         2.87%

RATIOS/SUPPLEMENTAL DATA:
   Ratio of expenses to average net
     assets (actual)**                       0.83%          0.90%          0.81%          0.68%         0.00%
   Decrease reflected in the above
     expense ratios due to undertakings
     by Parnassus Investments                0.50%          0.73%          0.98%          1.00%         1.18%
   Ratio of net investment income to
     average net assets                      5.98%          6.20%          7.00%          6.43%         3.20%
   Portfolio turnover rate                   2.80%         12.10%          5.20%         10.90%        15.29%
Net assets, end of period (000's)           $8,384         $6,585         $4,545         $4,160        $2,093


- -------------------------------------------------------------------------------------------------------------
California Tax-Exempt Portfolio              1996           1995           1994           1993           1992
- -------------------------------------------------------------------------------------------------------------
Net asset value at beginning of period      $16.06         $14.28         $16.10         $15.06        $ 0.00
                                             -----          -----          -----          -----         -----
INCOME FROM INVESTMENT OPERATIONS:
   Net investment income                      0.80           0.82           0.80           0.77          0.19
   Net realized and unrealized gain
     (loss) on securities                    (0.06)          1.78          (1.81)          1.16         15.05
                                             -----          -----          -----          -----         -----
     Total from investment operations         0.74           2.60          (1.01)          1.93         15.24
                                             -----          -----          -----          -----         -----
DISTRIBUTIONS:
   Dividends from net investment income      (0.78)         (0.82)         (0.81)         (0.78)        (0.18)
   Distributions from net realized
          gain on securities                  0.00           0.00           0.00          (0.11)         0.00
                                             -----          -----          -----          -----         -----
        Total distributions                  (0.78)         (0.82)         (0.81)         (0.89)        (0.18)
                                             -----          -----          -----          -----         -----
Net asset value at end of period            $16.02         $16.06         $14.28         $16.10        $15.06
                                             -----          -----          -----          -----         -----
TOTAL RETURN *                                4.78%         18.60%        (6.36%)         13.03%         1.70%

RATIOS/SUPPLEMENTAL DATA:
   Ratio of expenses to average net
     assets (actual)**                        0.54%          0.50%          0.39%          0.48%         0.00%
   Decrease reflected in the above
     expense ratios due to undertakings
     by Parnassus Investments                 0.46%          0.69%          0.87%          0.99%         2.10%
   Ratio of net investment income to
     average net assets                       4.96%          5.30%          5.37%          4.89%         2.10%
   Portfolio turnover rate                    0.00%         13.10%         12.00%         20.46%         0.00%
Net assets, end of period (000's)            $5,835         $4,483         $3,902         $3,256        $1,061


<FN>
*   1992 ratios relfect returns for seven months of operation and are not annualized.

**  Parnassus  Investments  has  agreed  to a 1.25%  limit on  expenses  for the
    Balanced  Portfolio and 1% for the  Fixed-Income  and California  Tax-Exempt
    Portfolios (See Note 5 for details).  Certain fees were waived for years for
    the years ended  December 31,  1996,1995,  1994 and 1993.  All expenses were
    waived for the seven-month  period ended December 31, 1992;  therefore,  the
    actual ratio of expenses to average net assets for each portfolio was 0%.

*** Average  commission rate is calculated for the periods  beginning January 1,
    1996 and applies only to portfolios with equity holdings.
</FN>


</TABLE>

Note:  This  information is taken from audited  financial  statements  that were
published in the Fund's annual reports and was audited by Deloitte & Touche LLP.


THE LEGEND OF MT. PARNASSUS
- --------------------------------------------------------------------------------
   Parnassus  is a mountain  in central  Greece  whose twin peaks rise more than
8,000 feet above sea level.  A dense forest covers the slopes of Mt.  Parnassus,
but the summit is rocky and, most of the time,  covered with snow.  The mountain
plays a  prominent  role in  Greek  mythology  because  on its  southern  slope,
overlooking the Gulf of Corinth, lies Delphi, site of the famous oracle.

   Originally,  the oracle  belonged to Gaia, the earth goddess.  Later,  Mother
Earth was worshipped under the name Delphyne and she controlled the oracle along
with her serpent-son,  Python,  and her  priestess-daughters  who controlled the
rites.  Eventually,  the Greek god, Apollo,  took over the site, doing away with
Python, but keeping the priestesses.

   The  most  "Greek"  of  the  gods,  Apollo   represented   enlightenment  and
civilization and presided over the establishment of cities.  Identified with the
development  of Greek codes of law,  Apollo was also the god of light,  a master
musician and a skilled archer.  Legend has it that Python,  an enormous  serpent
raised in the caves of Mt. Parnassus, controlled the site of Delphi. When <PAGE>


Apollo,  representing  civilization,  challenged Python,  representing  anarchy,
there was a heroic struggle, but the god finally killed the dragon by shooting a
hundred arrows into its body.

   There  were  many  oracles  in  ancient  Greece,  but only the one at  Delphi
achieved  a record of  reliability.  Apollo's  temple at Delphi  soon  became an
enormous  storehouse of treasures that were gifts of those who had consulted the
oracle.

   The oracle communicated through the voice of a priestess who spoke while in a
trance.  The priests of Delphi,  who  interpreted  the sayings of the priestess,
obtained a great deal of knowledge  and  information  from talking to the people
who came from all over the Greek world to consult at the shrine of Apollo. Quite
often, the oracle went against the prevailing wisdom of the time and frequently,
the proud were humbled and the lowly were justified.


INVESTMENT OBJECTIVE AND POLICIES
- -------------------------------------------------------------------------------

SOCIAL POLICY

   The Adviser will look for certain  social  policies in the companies in which
it invests.  These social policies are: (1) treating  employees fairly (2) sound
environmental protection policies (3) a good equal employment opportunity policy
(4) quality products and services (5) sensitivity to the communities  where they
operate  and (6)  ethical  business  practices.  Obviously,  no company  will be
perfect  in all  categories,  but the  Adviser  will make  value  judgements  in
deciding which companies best meet the criteria.  The Adviser will also consider
social  factors  other  than  these  six  (as  discussed  under  the  investment
objectives of each of the three portfolios).

   Although the Fund will emphasize positive reasons for investing in a company,
our operating policies call for excluding  companies that manufacture alcohol or
tobacco  products  or are  involved  with  gambling.  The Fund also  screens out
weapons contractors and those that generate electricity from nuclear power.

   The social  criteria of the Parnassus  Income Fund limit the  availability of
investment  opportunities.  However,  the Trustees and the Adviser  believe that
there are  sufficient  investments  available  that can meet the  Fund's  social
criteria and still provide a competitive rate of return.


BALANCED PORTFOLIO

   The primary objective of the Balanced Portfolio is current income and capital
preservation.  Capital appreciation is a secondary objective.  The Fund will try
to  achieve  this   objective  by  investing  in  a  diversified   portfolio  of
fixed-income  and equity  securities.  There is no  predetermined  allocation of
assets  for the  Balanced  Portfolio.  The  Adviser  will  determine  the mix of
investments  depending  upon  its  view  of  the  economic  outlook  and  market
conditions. This portfolio will, however, maintain at least 25% of its assets in
fixed-income securities at all times.

   The Balanced Portfolio may invest in both common and preferred stocks as well
as securities that are convertible into these instruments.  A common stock issue
selected for this portfolio,

<PAGE>


however, must pay a dividend at least equal to that paid by the average stock in
the S&P 500.  Issuers of equity  securities must meet the social criteria stated
in this prospectus.

   The  Balanced  Portfolio  will have the same  criteria  for its  fixed-income
investments as the Fixed-income  Portfolio.  For details, see the description of
the Fixed-income Portfolio below.

   The Balanced  Portfolio  may also invest up to 10% of its assets in community
development  loan funds such as those that provide  financing for small business
and low and moderate income  housing.  The Fund will not make loans to a project
itself,  but rather will invest money in an  intermediary  community  loan fund.
With projects having a strong,  positive social impact,  this portfolio may lend
money at below  market  interest  rates.  Generally  speaking,  there will be no
secondary  market for these loans and thus, there will be no liquidity for these
investments.  Although  the Fund  may  make  concessions  on  interest  rate and
liquidity,  no  concessions  will be made on standards of  creditworthiness.  In
general,  the Fund  will  work  with  community  organizations  that  have had a
successful record in making these kinds of loans.



RISK FACTORS

   As with all investments,  there are a number of risk factors  associated with
the Balanced  Portfolio.  The equity portion of the Balanced  Portfolio  poses a
risk in that an  individual  enterprise  may fall on hard times and operate with
little or no profits;  this would depress the price of its stock. There are also
risks  associated  with the economic  cycle (e.g. a recession) as well as market
risks  that might  sharply  reduce  the  valuation  of all stocks or stocks in a
specific industry.  Since the Balanced Portfolio will invest only in stocks that
pay a dividend,  the equity portion of the portfolio will be invested in larger,
more mature  companies.  These companies tend to be safer and less volatile than
those companies that don't pay a dividend.

   With preferred stock and higher-yielding  common stocks such as utilities,  a
major risk will be increased  interest rates that will decrease the market value
of the securities in question.  For a fuller  description of interest rate risk,
see the Risk Factors  section under  Fixed-income  Portfolio.  The discussion of
risk factors in that section  also applies to the fixed-  income  portion of the
Balanced Portfolio.

   There are also special risks involved with community  development loans which
may comprise as much as 10% of this portfolio. These loans do not have liquidity
and community  loan funds don't have the same kind of financial  resources as do
large commercial  enterprises.  Moreover,  there is no publicly  available track
record for  community  loan  funds so it is hard to assess the  history of these
kinds of loans.  In fact, one of the social  objectives of the Parnassus  Income
Fund is to establish a publicly available track record for community development
loans.



FIXED-INCOME PORTFOLIO

   The  investment  objective of the  Fixed-income  Portfolio is a high level of
current income consistent with safety and capital preservation. The Adviser will
try to achieve this  objective by investing in a diversified  portfolio of bonds
and other fixed-income  instruments that are rated investment grade. "Investment
grade" means receiving a rating within the four highest categories as determined
by  a   nationally-recognized   rating  service  such  as  Standard  and  Poor's
Corporation

<PAGE>

or Moody's Investors Service.  Securities in the lowest of these four categories
are considered  in-vestment grade, but they may have speculative  elements about
them.  The  Fixed-Income  Portfolio  will have at least 65% of its net assets in
securities rated "A" or better.  See the Appendix in the Statement of Additional
Information for a description of bond ratings.  Obligations issued or guaranteed
by the United States Government, its agencies or instrumentalities need not have
a rating.

   The fixed-income securities may be long-term, intermediate-term or short-term
or any combination thereof,  depending on market conditions.  They may also have
floating or variable  interest  rates.  Securities in this Portfolio may include
preferred stock, convertible preferred stock and convertible bonds.

   The Fixed-income  Portfolio will invest only in investment grade  securities.
We will not invest in "high-yield" or "junk" bonds.  Because of this emphasis on
quality and safety, the yield may not be as high as it otherwise might be.

   One of the social  objectives  of this  portfolio  is  long-term  support for
housing.  In this regard,  the Fund expects  that a  substantial  portion of the
Fixed-income  Portfolio will be invested in obligations of the Federal Home Loan
Mortgage  Corporation  (FHLMC or "Freddie Mac"), the Federal  National  Mortgage
Association  (FNMA  or  "Fannie  Mae")  and  the  Government  National  Mortgage
Association  (GNMA or "Ginnie  Mae").  Other  fixed-income  securities  that the
Adviser may choose from that have a positive  social impact include  obligations
of the Student Loan  Marketing  Association  (higher  education) and the Federal
Farm Credit System (family  farms).  This Portfolio may also invest up to 10% of
its assets in community  development loan funds. See the section on the Balanced
Portfolio for details.



RISK FACTORS

   The Adviser  anticipates that the Fixed-income  Portfolio's  average weighted
maturity  will be  between  5 and 20  years.  Because  of this  relatively  long
maturity,  the value of this  portfolio  will vary  inversely  with  changes  in
interest  rates. As interest rates go up, the net asset value (NAV) will go down
and as  interest  rates  drop,  the  NAV  of  this  Portfolio  will  go up.  The
Fixed-income  Portfolio is intended for  investors  who can accept the fact that
there  will be  principal  fluctuations.  The NAV of the  Portfolio  may also be
affected  by things  other than  interest  rates such as credit risk and general
market factors.



CALIFORNIA TAX-EXEMPT PORTFOLIO

   The investment objective of the California Tax-Exempt Portfolio is to provide
high current income exempt from both federal and California  personal income tax
while  choosing a portfolio that will have a positive  social and  environmental
impact.  The Adviser will pursue this  objective  by investing in a  diversified
portfolio of tax-exempt,  investment grade securities issued by California state
and local  governments  and by other public  authorities.  This Portfolio is for
California  residents  only.  David  Pogran  is the  portfolio  manager  for the
California Tax-Exempt Portfolio.

   The two principal classifications of municipal bonds are "general obligation"
and "revenue" bonds.  General obligation bonds are backed by the taxing power of
the issuer and considered

<PAGE>


the safest type of municipal bond.  Revenue bonds are backed by the revenue from
a specific  project  and may be backed by the credit and  security  of a private
user.  Investments in revenue bonds have more potential risk.  While interest on
private  activity  revenue bonds may be tax- exempt,  it may be treated as a tax
preference  item for  taxpayers  subject to the  alternative  minimum  tax.  The
California  Tax-Exempt  Portfolio will minimize its investment in such bonds and
no more than 20% of the  Portfolio's  assets  will be  invested  in bonds  whose
income is treated as a tax preference item under the federal alternative minimum
tax.

   The  Portfolio  may also purchase a right to sell a security held by the Fund
back to the issuer of the  security or another  party at an agreed upon price at
any time during a stated period or on a certain date.  These rights are referred
to as "demand  features" or "puts." The Portfolio may also purchase  floating or
variable rate obligations  (including  participations)  as well as variable rate
demand notes (VRDNs) which feature interest rates that float with an index and a
"put" feature. For temporary purposes, the Portfolio may invest up to 10% of its
assets in no-load,  open-end  investment  companies  which invest in  tax-exempt
securities  with  maturities  of less than one year ("tax  exempt  money  market
funds")  but the  Portfolio  will put no more than 5% of its assets into any one
fund.

   Normally,  the  Portfolio  will have all its assets  invested  in  tax-exempt
securities,  but may  temporarily  invest in  short-term  taxable  money  market
instruments.  Temporary  investments  will be limited to  obligations  issued or
guaranteed by the United States Government,  its agencies or  instrumentalities,
prime   commercial   paper  or   deposits   with   federally-insured   financial
institutions.

   The  California  Tax-Exempt  Portfolio  will  contain only  investment  grade
securities,  i.e.  those that have been rated at the time of  purchase in one of
the four highest  categories by Moody's,  Standard & Poor's Corporation or Fitch
Investors  Service,  or if unrated,  being similar in quality,  in the Adviser's
opinion,  to the top four categories.  These are considered  "investment  grade"
securities although bonds in the fourth highest category ("Baa") are regarded as
having an adequate  capacity to pay  principal  and  interest,  but with greater
vulnerability  to adverse economic  conditions;  they also have some speculative
characteristics.  (An  Appendix  to  the  Statement  of  Additional  Information
contains a description of the ratings of Moody's,  Fitch and Standard & Poor's.)
The  Portfolio  will not invest more than 20% of its total assets in  securities
rated in the  fourth  highest  category.  If the  rating on an issue held by the
Portfolio falls below investment grade after purchase, the Adviser will consider
such an  event  in its  evaluation  of a  specific  security,  but it  will  not
necessarily  result in an automatic sale of that security.  The Portfolio  does,
however, have an operating policy that no more than 5% of its assets may consist
of securities  which were rated  investment  grade at the time of purchase,  but
subsequently  drop below  investment  grade.  Because the California  Tax-Exempt
Portfolio will emphasize  safety and avoid junk bonds and other securities below
investment grade, the yield may not be as high as it otherwise might be.

   Examples of  activities  which the Trustees have  determined  have a positive
social and  environmental  impact  include  financing  for  schools,  libraries,
hospitals,  mass transit,  low and moderate  income housing,  pollution  control
facilities,  renewable energy  resources,  energy  conservation  projects,  park
development  and  open  space  acquisition.   The  Portfolio  will  not  finance
activities with a negative social or  environmental  impact as determined by the
Trustees

<PAGE>


and the Adviser.  Examples of activities with a negative social or environmental
impact include generating electricity from nuclear power,  constructing freeways
when mass transit is more  appropriate  and building  large-scale  dams or other
water projects that encourage  waste.  For all activities not listed above,  the
Adviser will make a determination  on a case-by-case  basis as to whether or not
the activity in question has a positive social and environmental impact.

   Some municipal  securities (usually industrial  development bonds) are issued
to finance  privately-operated sports facilities,  convention centers, airports,
parking structures,  factories or commercial developments.  In these situations,
the Adviser will make decisions on a  case-by-case  basis as to the social value
of the project in question. For example, the Adviser would probably refrain from
investing in securities that financed a fast-food operation,  but probably would
invest in an issue used to construct a plant that provided  substantial benefits
to the local community and had no negative  environmental  consequences.  In the
case of a project  benefiting a specific  company,  the Portfolio will apply the
social criteria listed under the "Social Policy" heading in this Prospectus.

   In the case of a sports  facility,  it might have  positive  benefits such as
jobs, community pride, economic development and family activities.  On the other
hand, a new sports  facility might have negative  environmental  consequences or
put too much demand on community financial resources for the benefit of a sports
franchise  owner to the detriment of more  important  community  needs.  Another
important  consideration  in a sports  stadium  might be whether  it  encouraged
public  transit  or caused  more  traffic  jams.  In all cases  such as a sports
facility  where the  Trustees  have not  determined  whether an  activity  has a
positive or negative  social/environmental  impact, the Adviser will balance all
the relevant  factors and make a  determination  if a given  security  meets the
Fund's social criteria.

   As a  fundamental  policy,  with  respect  to  75%  of its  net  assets,  the
California  Tax-Exempt Portfolio will not purchase a security if, as a result of
the  investment,  more than 5% of its assets would be in the  securities  of any
single  issuer.  (For  this  purpose,  each  political  subdivision,  agency  or
instrumentality and each multi-state agency which issues industrial  development
bonds on behalf of a private  entity,  will be regarded as a separate issuer for
determining the diversification of the California Tax-Exempt Portfolio).

   Under normal  circumstances,  the California  Tax-Exempt Portfolio intends to
invest 100% of its assets in California  municipal  obligations.  As a matter of
fundamental  investment  policy,  the Port-folio will invest at least 80% of its
assets in municipal obligations, the interest on which will be free from federal
income taxation . As an operating policy,  the Portfolio will invest at least 65
% of its assets in California municipal obligations. Usually, the Portfolio will
substantially exceed these minimum requirements, but the Portfolio may invest up
to 20% of assets in private  activity  bonds that may be subject to the  federal
alternative minimum tax.




RISK FACTORS


     Since  the  California   Tax-Exempt  Portfolio  will  invest  primarily  in
California  municipal  securities,  there are special risks involved  because of
recent  changes in the State  constitution  and other laws that raise  questions
about the ability of State and municipal issuers to obtain sufficient

<PAGE>

revenue  to  pay  their  bond  obligations.   California  voters  have  approved
amendments to the State  constitution  which limit property taxes as well as the
ability of taxing entities to raise other types of taxes.  In addition,  another
constitutional  amendment,  popularly  known  as  the  Gann  Initiative,  limits
increases  in  revenue   appropriations.   Federal  legislative  proposals  have
threatened the tax-exempt status or use of municipal  securities.  From mid-1990
to late  1993,  California  suffered  the  worst  economic,  fiscal  and  budget
conditions since the 1930's. The weak economy lowered tax revenues and increased
the need for social welfare expenditures causing recurring budget deficits.  Due
to budgetary and fiscal stress,  between October 1991 and July 1994,  ratings on
the State's general obligation bonds were reduced from AAA to A by S&P, from Aaa
to A1 by Moody's and from AAA to A by Fitch.  As of June 30, 1996,  the economic
recovery  that  began in late  1993 has  helped  eliminate  the  State's  budget
deficit.  In 1996,  S&P and  Fitch  upgraded  ratings  on  California's  general
obligation  bonds  from  A to A+.  The  governor's  budgets  for  1996-1997  and
1997-1998 are balanced as proposed. However, these proposed budgets are based on
revenue and expenditure  assumptions.  If these  assumptions are not met, future
budget deficits could materialize.

   The Portfolio will invest in securities with maturities of more than one year
and the average  maturity of all securities  will usually be five years or more.
If the Adviser  determines  that  market  conditions  warrant a shorter  average
maturity,  the Portfolio will be adjusted  accordingly.  Since the value of debt
obligations  typically  varies inversely with changes in interest rates, the net
asset value per share (NAV) of the Portfolio will also fluctuate in this manner.
As interest  rates go up, the NAV will go down and as interest  rates drop,  the
NAV will go up. The  California  Tax-Exempt  Portfolio is intended for investors
who can  accept the fact that there  will be  principal  fluctuations.  (See the
Statement of  Additional  Information  for a further  discussion of risk factors
involved with investing in California tax-exempt securities.)


OTHER INVESTMENT POLICIES
- --------------------------------------------------------------------------------
   Under normal  circumstances,  each portfolio of the Fund will have its assets
invested according to its stated investment  objective.  However,  for temporary
defensive  purposes or pending the  investment  of the proceeds of sales of Fund
shares or  portfolio  securities,  all or part of the assets may be  invested in
money market instruments or in repurchase agreements.  In these situations,  the
Fund's portfolios will not be following their investment objectives.

   Repurchase agreements involve the purchase by the Fund of debt securities and
their resale at an agreed-upon  price.  In order to minimize risk, the Fund will
enter into repurchase  agreements only with  recognized  securities  dealers and
banks that present  minimal  credit risk and, in all  instances,  the agreements
will be collateralized by U.S.  Government  securities with a value equal to the
total  repurchase  price.  Repurchase  agreements are always for periods of less
than one year and no more than 5% of a  portfolio's  assets may be  invested  in
repurchase agreements.

   The Fund is subject to certain investment  restrictions which are fundamental
policies  that  cannot be  changed  without  the  approval  of the  holders of a
majority of the Fund's outstanding

<PAGE>


voting  securities.  An operating  policy of the Fund or a Portfolio is one that
can be changed by the Board of  Trustees.  Each  investment  policy set forth in
this  Prospectus is fundamental  unless  specifically  described as an operating
policy.  The investment  objective of each portfolio is a fundamental  policy as
are  restrictions  that provide that each portfolio may not: (i) with respect to
75% of a  portfolio's  net  assets,  invest more than 5% of the value of its net
assets  in  securities  of any one  issuer  (other  than  obligations  issued or
guaranteed by the United States Government,  its agencies or instrumentalities);
(ii) with respect to 75% of a portfolio's net assets,  purchase more than 10% of
the outstanding  voting  securities or of any class of securities of any issuer;
(iii)  invest more than 25% of the value of its total  assets in  securities  of
issuers  in any one  industry;  or (iv)  borrow  money  except  from  banks  for
temporary or emergency purposes in amounts not exceeding 10% of each portfolio's
total  assets.  (A  portfolio  may not make  additional  investments  while  any
borrowings  are  outstanding.)  It is  possible  for the  Fund  to make  limited
investments in the securities of other investment  companies.  See the Statement
of   Additional   Information   for  more  details  on  the  Fund's   investment
restrictions.

   An operating  (although not fundamental) policy of the Fund is that it should
not make an investment if, thereafter, more than 15% of a portfolio's net assets
would be illiquid.  If the Fund finds itself with more than 15% of a portfolio's
net assets so invested,  it will take action to bring the  portfolio's  illiquid
assets below 15%. Illiquid assets include: (i) those which are restricted,  i.e.
those  which  cannot be freely sold for legal  reasons  (which the Fund does not
expect to own); (ii) fixed time deposits subject to withdrawal  penalties (other
than overnight time deposits); (iii) re-purchase agreements having a maturity of
more than seven days; and (iv)  investments for which market  quotations are not
readily available. However, the 15% limit does not include obligations which are
payable at  principal  amount  plus  accrued  interest  within  seven days after
purchase. 


PERFORMANCE INFORMATION
- --------------------------------------------------------------------------------

YIELD OF PORTFOLIOS

   From  time to  time,  the  Balanced,  the  Fixed-income  and  the  California
Tax-Exempt  Portfolios  may  advertise  their yields  including  current  yield,
effective  yield and tax  equivalent  yield.  Current yield refers to the income
generated by an investment  over a specific time period which is then annualized
(i.e. the amount of income  generated during a seven-day period is assumed to be
generated  each week over a 52-week  period and is shown as a percentage  of the
principal).  Effective  yield  is  calculated  in a  similar  manner,  but  when
annualized,  the income earned from the  investment is assumed to be reinvested.
Effective yield differs from current yield because of the compounding  effect of
reinvestment.

   The  California  Tax-Exempt  Portfolio may also  advertise its tax equivalent
yield.  The  Portfolio  calculates  this by taking the  tax-exempt  current  (or
effective)  yield and  dividing it by one minus the maximum  income tax rate for
California  residents (both federal and state) and adding it to that portion (if
any) of the Portfolio's yield that is not tax-exempt.


<PAGE>


TOTAL RETURN

   The Balanced  Portfolio,  the Fixed-income  Portfolio and the California Tax-
Exempt  Portfolio may each advertise  "total return." Total return refers to the
total change in value of an  investment  in the  portfolio  over a specific time
period.  It differs  from yield in that yield  figures  measure  only the income
component of the Portfolio's investments while total return measures both income
and any change in principal  (net asset value).  For more  information on how we
calculate  yield  and total  return,  please  see the  Statement  of  Additional
Information.

   Total return is historical  in nature and is not intended to indicate  future
performance.  The Fund will  quote  total  return for the most  recent  one-year
period and the average  annual  total  return will be quoted for the most recent
five and ten-year periods, or for the life of the Portfolio, if shorter.



COMPARISON OF FUND PORTFOLIOS

   The Fund may also advertise its cumulative total return for prior periods and
compare its  performance  to the  performance  of other  selected  mutual funds,
selected  market  indicators  such as the  Standard & Poor's 500 stock  index or
non-market indices or averages of mutual fund industry groups.

   The Fund may quote its  performance  rankings  and/or  other  information  as
published by  recognized  independent  mutual funds  statistical  services or by
publications of general  interest.  In connection  with a ranking,  the Fund may
provide  additional  information,  such as the  particular  category to which it
relates,  the  number of funds in that  category,  the  criteria  upon which the
ranking is based,  and the effect of sales charges,  fee waivers and/or expenses
reimbursements.

   All  Fund  performance  information  is  historical  and is not  intended  to
represent or guarantee  future  results.  The value of Fund shares when redeemed
may be more or less than their orginal cost.


<TABLE>
<CAPTION>
PERFORMANCE  FIGURES
- ----------------------------------------------------------------------------------------------------------
                                                               AVERAGE ANNUAL TOTAL RETURN
- ----------------------------------------------------------------------------------------------------------
                                                  BALANCED          FIXED-INCOME     CALIFORNIA TAX-EXEMPT
FOR PERIODS ENDING DECEMBER 31, 1996              PORTFOLIO           PORTFOLIO            PORTFOLIO
- ----------------------------------------------------------------------------------------------------------
<S>                                              <C>                    <C>                  <C>
One Year                                         7.09%                  4.08%                4.78%
Three Years                                      9.93%                  5.67%                5.18%
Life of Fund (date of inception was 9/1/92)     12.59%                  7.03%                6.94%
</TABLE>


   The  Fund's  annual  report  contains  additional   performance   information
including a discussion by management. You may obtain a copy of the annual report
without charge by calling or writing the Fund.


MANAGEMENT
- --------------------------------------------------------------------------------
   The Fund's  Board of  Trustees  decides  on  matters  of  general  policy and
supervises the activities of the Fund's Adviser. The Fund's officers conduct and
supervise the daily business operations

<PAGE>


of the Fund.  The Trustees and  officers  are listed below  together  with their
principal occupations during at least the past five years.

   Jerome L. Dodson*,  President and Trustee, is also President of the Parnassus
Fund and of Parnassus  Investments,  the Adviser.  From 1975 to 1982, Mr. Dodson
served as  President  and Chief  Executive  Officer  of  Continental  Savings of
America. From 1982 to 1984, he was President and Trustee of Working Assets Money
Fund and he also served as a Trustee from 1988 through 1991. He is a graduate of
the  University of California at Berkeley and of Harvard  University's  Graduate
School of Business Administration.  Mr. Dodson is the portfolio manager for both
the Balanced Portfolio and the Fixed-Income Portfolio.

   Herbert A. Houston,  Trustee,  is the Chief  Executive  Officer of the Haight
Ashbury Free Clinics, Inc. Previously, he worked as Development Director for the
National  Association  for Sickle Cell Disease,  Vice  President of the Bay Area
Black United Fund and as an executive for the Combined  Federal Campaign and the
United Way of the Bay Area. He is a graduate of California  State  University at
Hayward and holds a Master's degree in Public  Administration  & Health Services
from the University of Southern California.


   Howard M.  Shapiro,  Trustee,  is a consultant  to  non-profit  organizations
specializing   in  marketing,   fund-raising   and   organizational   structure.
Previously,  he  worked  for 28  years  in  marketing,  advertising  and  public
relations.  He is a Trustee of the  Portland  Art Museum,  and  President of the
Portland  Housing  Authority.  He has also  served as a  Director  of the Social
Investment Forum. Mr. Shapiro is a graduate of the University of Washington.  He
is no relation to Joan Shapiro.

   Joan Shapiro, Trustee, is Executive Vice President of The South Shore Bank of
Chicago.  She is a former President of The Social Investment Forum, the national
trade association of the social investment  movement.  She is also a Director of
the New Israel Fund and a Governor of  International  House at the University of
Chicago. She is a graduate of Cornell University.  Ms. Shapiro is no relation to
Howard Shapiro.

   Howard Fong,  Vice  President and  Treasurer,  is also Vice  President of the
Parnassus  Fund and of  Parnassus  Investments.  Mr. Fong began his career as an
examiner with the California  Department of Savings and Loan. In 1979, he joined
Continental  Savings  where he worked until 1988,  most  recently as Senior Vice
President and Chief Financial Officer. He joined the Parnassus Fund in 1988. Mr.
Fong graduated  from San Francisco  State  University  with a degree in business
administration .


   Richard D. Silberman, Secretary, is an attorney specializing in business law.
He has been general counsel to the Parnassus Income Fund since its inception. He
holds bachelor's degrees in business  administration and law from the University
of Wisconsin  and a Master of Laws from Stanford  University.  He is a member of
both the Wisconsin and California Bars.

   David  Pogran,  Portfolio  Manager,  has  managed the  California  Tax Exempt
Portfolio  since its  inception  in  September  1992.  He has been  director  of
research at  Parnassus  Investments,  since 1989.  He received  his MBA from the
University of California at Berkeley,  and his undergraduate studies were at the
University  of Wisconsin at Madison.  Prior to  receiving  his MBA,  David spent
eight years in retail management.

   *Denotes  "interested  trustee" as defined in the  Investment  Company Act of
1940




<PAGE>

THE ADVISER
- --------------------------------------------------------------------------------

   Parnassus  Investments (the "Adviser"),  One Market-Steuart  Tower #1600, San
Francisco,  California  94105 acts as investment  adviser to the Fund subject to
the  control  of the  Fund's  Board of  Trustees,  and as such,  supervises  and
arranges the purchase and sale of securities held in the Fund's portfolios.  The
Adviser has been the investment manager of the Parnassus Fund since 1985 and the
Parnassus Income Fund since 1992.

   For its services,  the Fund,  under an  Investment  Advisory  Agreement  (the
"Agreement") be-tween the Fund and the Adviser, pays the Adviser a fee, computed
and payable at the end of each month,  at the following  annual  percentages  of
each portfolio's average daily net assets; the Balanced Portfolio,  0.75% of the
first $30  million,  0.70% of the next $70 million and 0.65% of the amount above
$100  million.  For the  Fixed-income  Portfolio and the  California  Tax-Exempt
Portfolio,  the fee is 0.50% of the first $200  million,  0.45% of the next $200
million and 0.40% of the amount above $400 million.

   In addition to the fee payable to the Adviser,  the Fund is  responsible  for
its  operating  expenses,  including:  (i)  interest and taxes;  (ii)  brokerage
commissions;  (iii) insurance  premiums;  (iv)  compensation and expenses of its
Trustees  other  than those  affiliated  with the  Adviser;  (v) legal and audit
expenses;  (vi) fees and expenses of the Fund's  custodian,  transfer  agent and
accounting  services  agent;  (vii)  expenses  incident  to the  issuance of its
shares,  including  issuance on the  payment of or  reinvestment  of  dividends;
(viii) fees and expenses  incident to the  registration  under  federal or state
securities laws of the Fund or its shares; (ix) expenses of preparing,  printing
and mailing  reports and notices and proxy material to shareholders of the Fund;
(x)  all  other   expenses   incidental  to  holding   meetings  of  the  Fund's
shareholders;  (xi) dues or  assessments of or  contributions  to the Investment
Company  Institute,  the Social  Investment  Forum or any successor;  (xii) such
nonrecurring expenses as may arise,  including litigation affecting the Fund and
the legal  obligations  which the Fund may have to  indemnify  its  officers and
Trustees  with  respect  thereto.  In  allocating  brokerage  transactions,  the
investment  advisory  agreement  states that the Adviser may  consider  research
provided by brokerage  firms or whether those firms sold shares of the Fund. See
page  B-11  of  the  SAI  for  more   information  on  brokerage  and  portfolio
transactions. 

   
(Paragraph deleted)
    

HOW TO PURCHASE SHARES
- --------------------------------------------------------------------------------

DIRECT PURCHASE OF SHARES

   To purchase shares, an investor should complete and mail the application form
along with a check  payable to The  Parnassus  Income Fund. It should be sent to
the Fund at the following address.

                            The Parnassus Income Fund
                         One Market-Steuart Tower #1600
                         San Francisco, California 94105



<PAGE>


   An initial  investment  must be at least $2,000  except for certain  employee
benefit plans or tax  qualified  retirement  plans (e.g.  IRA, SEP) and accounts
opened  pursuant  to the Uniform  Gift to Minor's  Act (UGMA)  which have a $500
minimum.  Subsequent  investments  for all accounts  must be at least $50.  With
subsequent  investments,  shareholders  should  write the name and number of the
account  on the  check.  Checks do not need to be  certified,  but are  accepted
subject  to  collection  and must be drawn in United  States  dollars  on United
States banks.  If received  before 1:00 p.m. San Francisco  time, the investment
will be processed at the net asset value  calculated on the same business day it
is received.  If the investment is received after 1:00 p.m. San Francisco  time,
it will be processed the next business day. 



OTHER INFORMATION

     The Fund also offers additional  services to investors  including plans for
the systematic  investment and withdrawal of money as well as IRA and SEP plans.
Information about these plans is available from the Distributor.


     The  minimum  initial  investment  in the Fund is  $2,000  and the  minimum
subsequent  investment is $50, except for retirement plans,  UGMA accounts,  and
Parnassus Automatic  Investment  Accounts (PAIP) which have a $500 minimum.  The
distributor reserves the right to reject any order.

     There is no sales charge for any  portfolio of the Fund,  but investors may
be  charged  a  transaction  or  other  fee  in  connection  with  purchases  or
redemptions of Fund shares on their behalf by an investment adviser, a brokerage
firm or other financial institution.


PURCHASES VIA PARNASSUS AUTOMATIC INVESTMENT PLAN (PAIP)

     After making an initial  investment  to open an account ($500  minimum),  a
shareholder  may purchase  additional  shares ($50  minimum)  via the  Parnassus
Automatic  Investment Plan (PAIP).  On a monthly or quarterly basis,  your money
will automatically be transferred from your bank account to your Fund account on
the day of your choice (3rd or 18th day of the month). You can elect this option
by  filling  out  the  PAIP  section  on  the  new  account  form.  For  further
information,  call  the Fund and ask for the  free  brochure  called  "Automatic
Investing and Dollar-Cost Averaging."

NET ASSET VALUE


   The Fund's net asset value per share is  determined  as of 4:00 p.m.  Eastern
time on each day that the New York Stock Exchange is open for trading ("business
day") and on any other  day that  there is a  sufficient  degree of  trading  in
investments  held by the Fund to affect the net asset value. The net asset value
may not be determined on any day that there are no transactions in shares of the
Fund. 

   The net asset  value per share is the value of the  Fund's  assets,  less its
liabilities,  divided by the number of shares of the Fund outstanding. The value
of the  Fund's  portfolio  securities  is the market  value of such  securities.
However, securities and other assets for which market quotations are not readily
available  are  valued at their fair  value as  determined  in good faith by the
Adviser under  procedures  established by and under the general  supervision and
responsibility of the Fund's Board of Trustees.  See the Statement of Additional
Information for details.



<PAGE>


HOW TO REDEEM SHARES
- --------------------------------------------------------------------------------


   You may sell or redeem your Fund shares by offering them for  "repurchase" or
"redemption"  directly to the Fund. To sell your shares to the Fund (that is, to
redeem  your  shares),  you  must  send  your  instructions  to the  Fund at One
Market-Steuart  Tower #1600, San Francisco,  California 94105. You may also send
your redemption  instructions by FAX to (415) 778-0228 if the redemption is less
than  $25,000.  Your  shares  will be  redeemed  at the  net  asset  value  next
determined  after receipt by the Fund of your  instructions in proper form. Give
your account  number and  indicate the number of shares you wish to redeem.  All
owners of the account must sign unless the account  application form states that
only one signature is necessary for redemptions.  All redemption  checks must be
sent  to  the  address  of  record  on  the  account.   The  Fund  must  have  a
change-of-address  on file for 30 days before we send redemption or distribution
checks to the new address.  Otherwise,  we require a signature  guarantee or the
check  must be  sent to the old  address.  If you  wish to have  the  redemption
proceeds sent by wire transfer or by overnight  mail,  there will be a charge of
$10 per transaction.  The Fund usually requires additional documents when shares
are registered in the name of a corporation,  agent or fiduciary or if you are a
surviving  joint  owner.  In the case of a  corporation,  we  usually  require a
corporate  resolution  signed  by the  secretary.  In the  case of an  agent  or
fiduciary,  we  usually  re-quire  an  authorizing  document.  In the  case of a
surviving  joint  owner,  we  usually  require a copy of the death  certificate.
Contact  the Fund by phone at (800)  999-3505  if you have any  questions  about
requirements for redeeming your shares. 

   If the Fund has  received  payment  for the shares you wish to redeem and you
have provided the  instructions  and any other documents needed in correct form,
the  Fund  will  promptly  send you a check  for the  proceeds  from  the  sale.
Ordinarily, the Fund must send you a check within seven days unless the New York
Stock  Exchange  is closed for days other than  weekends or  holidays.  However,
payment may be delayed for any shares  purchased by check for a reasonable  time
(not to exceed 15 days from the date of such purchase) necessary for the Fund to
determine that the purchase check will be honored.

   EXCHANGE PRIVILEGES.  The proceeds of a redemption of shares from a portfolio
of the Fund can be used to purchase shares of another portfolio of the Fund. The
proceeds  of a  redemption  of shares from the Fund can also be used to purchase
shares of the  Parnassus  Fund,  but if no sales  charge  was paid on the shares
being  redeemed  from the Income  Fund,  those shares will be subject to a sales
charge when they are invested  into the  Parnassus  Fund. If shares are redeemed
from the  Parnassus  Fund and  invested  in the  Income  Fund,  there will be no
additional  sales charge if those shares are transferred back into the Parnassus
Fund.

   There is no limit on the number of or dollar  amount of  exchanges.  The Fund
reserves the right to modify or eliminate this exchange privilege in the future.
The  exchange  privilege  is only  available in states where the exchange may be
legally  made.  The  exchange  of shares is treated as a sale and an  exchanging
shareholder may, therefore, realize a taxable gain or loss.


<PAGE>

   TELEPHONE  TRANSFERS.  Shareholders  who  elect  to  use  telephone  transfer
privileges  must so indicate  on the account  application  form.  The  telephone
transfer  privilege  allows a shareholder to effect exchanges from the Fund into
an identically  registered  account in another one of the Parnassus  Funds (e.g.
The Parnassus Fund).  Neither the Fund nor Parnassus  Investments will be liable
for following  instructions  communicated by telephone reasonably believed to be
genuine;   a  loss  to  the  shareholder  may  result  due  to  an  unauthorized
transaction.  The Fund and the transfer agent will employ reasonable  procedures
to confirm that instructions  communicated by telephone are genuine.  Procedures
may  include  one or  more  of the  following:  recording  all  telephone  calls
requesting telephone exchanges,  verifying authorization and requiring some form
of  personal  identification  prior to acting  upon  instructions  and sending a
statement  each  time a  telephone  exchange  is made.  The  Fund and  Parnassus
Investments  may be liable  for any losses due to  un-authorized  or  fraudulent
instructions  only if such  reasonable  procedures are not followed.  Of course,
shareholders are not obligated in any way to authorize  telephone  transfers and
may choose to make all exchanges in writing.  The telephone  exchange  privilege
may be modified or  discontinued  by the Fund at any time upon 60 days'  written
notice to shareholders.

   REDEMPTION  OF SMALL  ACCOUNTS.  The  Trustees  may,  in order to reduce  the
expenses of the Fund,  redeem all of the shares of any shareholder whose account
is worth less than $500 as a result of a redemption  order. This will be done at
the net asset value  determined  as of the close of business on the business day
preceding  the  sending  of such  notice  of  redemption.  The  Fund  will  give
shareholders  whose shares are being  redeemed 60 days' prior written  notice in
which to purchase sufficient shares to avoid such redemption.


DIVIDENDS AND TAXES
- --------------------------------------------------------------------------------

   The  Balanced  Portfolio  normally  declares  and  pays  dividends  from  net
investment  income ("income  dividends") on a quarterly  basis. The Fixed-income
Portfolio  and the  California  Tax Exempt  Portfolio  normally  declare and pay
income  dividends on a monthly basis.  Dividends  from  long-term  capital gains
("capital gains  dividends") are paid once a year (usually in mid-December)  for
all portfolios of the Fund.  Shareholders  can have dividends paid in additional
shares and reinvested or paid out in cash. If an investor  purchases shares just
before  the  dividend  date,  he or she will be taxed on the  distribution  even
though it's a return of capital.


TAXATION OF THE FUND

   By paying  out  substantially  all its net  investment  income  (among  other
things),  the Fund believes it qualifies as a regulated investment company under
Subchapter  M of the  Internal  Revenue  Code.  The Fund  intends to continue to
qualify  and, if so, it will not pay income  taxes on either its net  investment
income or on its capital gains.  Instead,  each  shareholder will be responsible
for his or her own taxes.



<PAGE>



TAXATION OF SHAREHOLDERS

   For the Balanced Portfolio and the Fixed-income Portfolio, all dividends from
net investment  income together with  distribution  of short-term  capital gains
(collectively,  "income  dividends")  will be  taxable  as  ordinary  income  to
shareholders  even though paid in additional  shares.  Any net long-term capital
gains  ("capital  gains   dividends")  are  taxable  as  such  to  shareholders.
Tax-exempt  shareholders,  of course,  will not be  required to pay taxes on any
amount  paid to them.  (This  includes  IRAs and other  tax-deferred  retirement
accounts.)  Annually,  shareholders  will receive on Form 1099 the dollar amount
and tax status of all dividends received.

   The Fund may be required to impose backup  withholding  at a rate of 31% from
any income  dividend and capital gain  distribution  upon payment of  redemption
proceeds.  Shareholders  can eliminate any backup  withholding  requirements  by
furnishing  certification  of  taxpayer  identification  numbers  and  reporting
dividends. 

   To the extent that income  dividends  are derived from  qualifying  dividends
paid  by  domestic  corporations  whose  shares  are  owned  by the  Fund,  such
dividends, in the hands of the Fund's corporate  shareholders,  will be eligible
for the 70% dividends  received  deduction.  Individuals do not qualify for this
deduction--only corporations.




CALIFORNIA TAX-EXEMPT PORTFOLIO

   This  Portfolio is for  California  residents  only.  Dividends  derived from
interest on state and local obligations constitute  "exempt-interest"  dividends
on which  shareholders are not subject to federal income tax. To the extent that
income dividends are derived from earnings  attributable to California state and
local  obligations,  they will be exempt from  federal and  California  personal
income tax.  Such  dividends may be subject to  California  franchise  taxes and
corporate income taxes if received by a corporation subject to such taxes.

   Dividends  attributable to interest on certain private  activity bonds issued
after  August 7, 1986 must be included in federal  alternative  minimum  taxable
income for the purpose of  determining  liability  (if any) for the  alternative
minimum tax (AMT) for individuals and for corporations.

   Dividends  derived from taxable interest and any  distributions of short-term
capital gains are taxable to shareholders as ordinary  income.  Distributions of
long-term  capital  gains,  if any, are taxable to  shareholders  as a long-term
capital gain regardless of how long their shares of the Portfolio have been held
except that  losses on certain  shares held less than six months will be treated
as  long-term  capital  losses to the  extent  of the  long-term  capital  gains
dividends received on such shares.
   The  Portfolio  will notify  shareholders  each January as to the federal and
California tax status of dividends paid during the previous calendar year.



<PAGE>

GENERAL INFORMATION
- --------------------------------------------------------------------------------

   The Fund was organized as a  Massachusetts  business  trust on August 8,1990.
The  Declaration of Trust provides the Trustees will not be liable for errors of
judgement  or mistakes of fact or law, but nothing in the  Declaration  of Trust
protects a Trustee  against any liability to which he or she would  otherwise be
subject  by reason of  willful  misfeasance,  bad  faith,  gross  negligence  or
reckless disregard of the duties involved in the conduct of his or her office.

   Shareholders  are  entitled  to one  vote  for  each  full  share  held  (and
fractional votes for fractional shares) and may vote in the election of Trustees
and  on  other  matters  submitted  to  meetings  of  shareholders.  In  matters
pertaining to only one series of the Trust (i.e. one Portfolio), only holders of
that  series are  entitled to vote,  so matters  that  require  the  approval of
outstanding  shares must be approved by the holders of a majority of each series
that will be affected by the matter.  On issues  related to the Fund as a whole,
specifically  including  election of  Trustees  and  ratification  of the Fund's
principal   underwriter   and  selection  of  the  Fund's   independent   public
accountants,  holders  of all  series  will vote.  It is not  contemplated  that
regular annual meetings of  shareholders  will be held. The Declaration of Trust
provides that the Fund's  shareholders  have the right,  upon the declaration in
writing or vote of more than two-thirds of its outstanding  shares,  to remove a
Trustee. The Trustees will call a meeting of shareholders to vote on the removal
of a Trustee  upon written  request of the record  holders of ten percent of its
shares. In addition, ten shareholders holding the lesser of $25,000 worth or one
percent of Fund  shares may advise  the  Trustees  in writing  that they wish to
communicate  with other  shareholders for the purpose of requesting a meeting to
remove a Trustee. The Trustees will then, if requested by the applicant, mail at
the applicants' expense the applicant's communication to all other shareholders.
No amendment may be made to the  Declaration  of Trust  without the  affirmative
vote  of the  holders  of  more  than  50% of our  outstanding  shares,  or upon
liquidation  and  distribution  of its  assets,  if  approved by the vote of the
holders of more than 50% of our outstanding  shares.  If not so terminated,  the
Fund will continue indefinitely.

   Deloitte & Touche LLP, 50 Fremont  Street,  San Francisco,  CA 94105 has been
selected as the Fund's independent auditors.

   Union Bank of California,  475 Sansome Street,  San Francisco,  CA 94111, has
been  selected as the  custodian  of the Fund's  assets.  Shareholder  inquiries
should be directed to the Fund.

   Parnassus  Investments,   One  Market-Steuart  Tower  #1600,  San  Francisco,
California 94105, is the Fund's transfer agent and accounting agent. As transfer
agent,  Parnassus  Investments receives a fee of $2.30 per account per month. As
accounting  agent,  Parnassus  Investments  receives a fee of $50,000  per year.
Jerome L. Dodson,  the Fund's  President,  is the sole  stockholder of Parnassus
Investments.



<PAGE>


INVESTMENT ADVISER
Parnassus Investments
One Market-Steuart Tower #1600
San Francisco, California 94105

LEGAL COUNSEL
Richard D. Silberman, Esq.
465 California Street #1020
San Francisco, California 94104

AUDITORS
Deloitte & Touche LLP
50 Fremont Street
San Francisco, California 94105

CUSTODIAN
Union Bank of California
475 Sansome Street
San Francisco, California 94111

DISTRIBUTOR
Parnassus Investments
One Market-Steuart Tower #1600
San Francisco, California 94105















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