PARNASSUS INCOME FUND
497J, 2000-05-09
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                           THE PARNASSUS INCOME TRUST

       One Market-Steuart Tower #1600 San Francisco, Ca 94105 800-999-3505
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PROSPECTUS-MAY 1, 2000
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     The  Parnassus  Income  Trust (the  "Trust") is a mutual  fund,  managed by
Parnassus   Investments  (the  "Adviser").   The  Adviser  chooses  the  Trust's
investments  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 Trust has three  funds.  The Equity  Income  Fund
invests primarily in stocks that pay a dividend, and its investment objective is
both current  income and capital  appreciation.  The  Fixed-Income  Fund invests
primarily  in bonds  and  other  fixed-income  investments,  and its  investment
objective  is a  high  level  of  current  income  consistent  with  safety  and
preservation  of  capital.  The  California   Tax-Exempt  Fund  (for  California
residents  only) has as its investment  objective a high level of current income
exempt from federal and California  personal  income tax consistent with prudent
investment management.

<TABLE>
<CAPTION>

TABLE OF CONTENTS
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<S>     <C>    <C>    <C>    <C>    <C>    <C>

Investment Summary                     2        How to Purchase Shares      16

Trust Expenses                         7        How to Redeem Shares        18

The Legend of Mt. Parnassus            8        Dividends and Taxes         20

Investment Objective and Policies      9        Financial Highlights        21

Management                            13        General Information         23

The Adviser                           15
</TABLE>




[FN]

     Like  securities  of all  mutual  funds,  these  securities  have  not been
approved or disapproved by the Securities and Exchange Commission (SEC), and the
SEC  has  not  determined  if this  prospectus  is  accurate  or  complete.  Any
representation to the contrary is a criminal offense.

</FN>


<PAGE>



INVESTMENT SUMMARY
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                               Equity Income Fund

Investment Objective and Principal Strategies
     The  Parnassus  Equity  Income  Fund  invests  primarily  in a  diversified
portfolio of equity securities.  Its investment objective is both current income
and capital  appreciation.  Equity securities include common and preferred stock
as well as  convertible  bonds.  At least 75% of the Fund's  total  assets  will
normally be invested in equity  securities  that pay interest or dividends.  The
remaining  25% may be invested in  non-dividend  paying  equity  securities,  in
investment grade debt securities or money market instruments.  The Fund seeks to
invest in  equity  securities  that pay  above-average  dividends  and which the
Adviser  believes  have the  capacity to raise  dividends in the future and also
have the potential for capital appreciation. To determine a company's prospects,
the Adviser reviews the company's profit and loss statement, sales, earnings and
dividend  histories,  net cash flow and  outlook for future  earnings.

     The Fund takes social as well as  financial  factors into account in making
investment  decisions.  In general,  The Parnassus  Equity Income Fund looks for
companies  that  respect the  environment,  treat  their  employees  well,  have
effective equal employment  opportunity policies and good community relations as
well as ethical  business  dealings.  The Fund will not invest in companies that
are involved with gambling or manufacture alcohol or tobacco products.  The Fund
also screens out weapons  contractors and those that generate  electricity  from
nuclear power.

Principal Risks of Investing in the Equity Income Fund
     Investing  in the Fund may  result in a loss of  money.  When you sell your
shares,  they may be worth more or less than what you paid for them.  The Fund's
share price changes daily based on the value of its holdings.  Stock markets are
volatile  and stock values  fluctuate in response to the fortunes of  individual
companies and in response to general  market and economic  conditions  both here
and abroad.  The Fund's holdings can vary  significantly from broad stock market
indexes. As a result, the Fund's performance can deviate from the performance of
these indexes. For best results,  investors should have a long-term  perspective
and plan to hold their shares for at least three years.  (Legally,  shareholders
may redeem at any time,  but the Fund manager  recommends  a minimum  three-year
holding period.)

Performance Information  for  the  Equity  Income  Fund
     The bar chart below provides an indication of the risks of investing in the
Parnassus  Equity Income Fund by showing changes in the Fund's  performance from
year to year over a seven-year  period.  Prior to April 1, 1998,  the  Parnassus
Equity Income Fund had a different investment objective,  maintaining a balanced
portfolio  of both stocks and bonds.  How the Fund  performed in the past is not
necessarily an indication of how the Fund will perform in the future.


<PAGE>


     [GRAPHIC OMITTED]

     During the seven-year period shown in the bar chart, the highest return for
a quarter was 23.4% (quarter ending December 31, 1998) and the lowest return for
a quarter was a loss of 11.6% (quarter  ending  September 30, 1998).

     Below is a table comparing the  performance of the Parnassus  Equity Income
Fund with the S&P 500 Index,  the  Wilshire  5000 Index and the  average  equity
income fund followed by Lipper Inc.  Figures are average  annual returns for the
one and  five-year  periods  and for the life of the Fund  (since  inception  on
August 31, 1992).

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------
Average Annual Total Returns    Parnassus Equity   Lipper Equity Income   Wilshire 5000     S&P 500
for periods ending 12/31/99        Income Fund         Fund Average           Index          Index
- ------------------------------------------------------------------------------------------------------
<S>                                  <C>                   <C>               <C>            <C>
One Year                             22.78%                3.34%             23.82%         21.04%
Five Years                           18.13%               17.36%             27.11%         28.46%
Since Inception 8/31/92              14.73%               14.24%             20.80%         21.43%
- ------------------------------------------------------------------------------------------------------
<FN>
     Past performance is no guarantee of future returns.  Investment  return and
principal will fluctuate and an investor's shares,  when redeemed,  may be worth
more or less than their original cost.

     The S&P 500 is the Standard & Poor's Composite Index of 500 large stocks, a
widely recognized index of common stock prices. The Wilshire 5000 is a composite
index of more than 5,000 companies that includes  virtually all  publicly-traded
companies  that are suitable for  investment  by  institutional  investors.  For
comparative  purposes,  the Parnassus Equity Income Fund will henceforth use the
Wilshire  5000 instead of the S&P 500 because the former is more  representative
of the  market as a whole  while the S&P 500  emphasizes  larger  companies.  An
individual  cannot  invest in the S&P 500 Index or the  Wilshire  5000 Index and
these indices do not take any investing  expenses into account as do the figures
for the Parnassus Equity Income Fund and Lipper's Equity Income Fund Average.

</FN>
</TABLE>

                                Fixed-Income Fund

Investment  Objective and Principal  Strategies
     The Parnassus Fixed-Income Fund invests in a diversified portfolio of bonds
and other fixed income instruments and its investment  objective is a high level
of current income  consistent with safety and preservation of capital.  The Fund
invests in  investment  grade bonds  which means they are rated  within the four
highest  categories  as determined by a  nationally-recognized  rating  service.
Ordinarily,  at least 65% of the Fund's  total net assets  will be  invested  in
bonds  rated "A" or better by  Moody's  Investors  Service,  Inc.  (Moody's)  or
Standard & Poor's Rating Group (S&P).


<PAGE>



     The Fund may invest in a  combination  of long-term,  intermediate-term  or
short-term  fixed-income  securities  depending on market  conditions  and these
securities may also have floating or variable  interest rates. The portfolio may
be comprised of U.S. Government  obligations,  corporate bonds, preferred stock,
convertible  preferred stock and convertible  bonds. The Fund will not invest in
"high-yield"  or "junk"  bonds.  The Fund may,  however,  hold  bonds  that were
investment  grade when  first  purchased,  but have  subsequently  fallen  below
investment  grade.  The Adviser,  however,  will not permit more than 15% of the
Fund's  total net assets to be invested in such bonds at any one time.
     The Fund takes social as well as  financial  factors into account in making
investment  decisions.  In general,  The Parnassus  Fixed-Income  Fund looks for
companies  that  respect the  environment,  treat  their  employees  well,  have
effective equal employment  opportunity policies and good community relations as
well as ethical  business  dealings.  The Fund will not invest in companies that
are involved with gambling or manufacture alcohol or tobacco products.  The Fund
also screens out weapons  contractors and those that generate  electricity  from
nuclear power.

Principal Risks of Investing in the  Fixed-Income  Fund
     Investing  in the Fund may  result  in a loss of money  when you sell  your
shares. The Fund's share price changes daily based on the value of its holdings.
The Fund's average  weighted  maturity will be between 5 and 20 years. The value
of the Fund will vary  inversely  with  changes in interest  rates.  As interest
rates go up, the net asset  value will  likely go down,  and as  interest  rates
drop, the NAV of the Fund will likely go up. This Fund is intended for investors
who can accept the fact that there will be  principal  fluctuations.  The NAV of
the Fund  will  also be  affected  by other  factors  such as  credit  risk (the
possibility  that an issuer of a debt  obligation does not pay the Fund interest
or  principal)  and market  risk (the  possibility  that the market  value of an
investment  may move up or down  and that its  movement  may  occur  quickly  or
unpredictably). When you sell your shares of the Fund, they may be worth more or
less than what you paid for them.

Performance  Information for the Fixed-Income Fund
     The bar chart below provides an indication of the risks of investing in the
Parnassus  Fixed-Income  Fund by showing changes in the Fund's  performance from
year to year over a seven-year period. How the Fund performed in the past is not
necessarily  an  indication of how the Fund will perform in the  future.

     [GRAPHIC OMITTED]



<PAGE>


     During the seven-year period shown in the bar chart, the highest return for
a quarter was 7.5%  (quarter  ending June 30, 1995) and the lowest  return for a
quarter was a loss of 4.4% (quarter ending June 30, 1994).

     Below is a table  comparing the  performance of the Parnassus  Fixed-Income
Fund with the Lehman  Government/Corporate  Bond Index and the  average  A-rated
bond fund followed by Lipper,  Inc.  Figures are average  annual returns for the
one and  five-year  periods  and for the life of the Fund  (since  inception  on
August 31, 1992).

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------
Average Annual Total Returns        Parnassus          Lehman Government/      Lipper A-Rated Bond
for periods ending 12/31/99     Fixed-Income Fund     Corporate Bond Index        Fund Average
- ------------------------------------------------------------------------------------------------------
<S>                                  <C>                     <C>                     <C>
One Year                             (4.32%)                 (2.58%)                 (2.15%)
Five Years                            7.45%                   6.91%                   7.61%
Since Inception 8/31/92               5.87%                   5.79%                   6.13%
- ------------------------------------------------------------------------------------------------------
<FN>

     Past performance is no guarantee of future returns.  Investment  return and
principal will fluctuate and an investor's shares,  when redeemed,  may be worth
more or less than their original cost.

     The Lehman  Government/Corporate  Bond Index is a widely  recognized  index
measuring  the  performance  of bonds  and  other  fixed-income  securities.  An
individual  cannot  invest  directly  in the index  and the index  does not take
investing expenses into account as do the figures for the Parnassus Fixed-Income
Fund and Lipper's average A-rated bond fund.
</FN>
</TABLE>

                           California Tax-Exempt Fund

Investment  Objective and  Principal  Strategies
     The  Parnassus  California  Tax-Exempt  Fund  is  available  to  California
residents only. It invests in a diversified portfolio of tax-exempt,  investment
grade securities  issued by California state and local  governments and by other
public  authorities.  Its  investment  objective  is to  provide a high level of
current  income  exempt from both  federal and  California  personal  income tax
consistent with prudent investment management.

     The Fund  invests in  investment  grade  bonds  which  means they are rated
within the four highest  categories  as  determined  by a  nationally-recognized
rating service. No more than 20% of the Fund's portfolio will be invested in the
4th highest category.  Under normal circumstances,  the Fund will invest 100% of
its assets in California municipal  obligations.  However, it could invest up to
20% of its assets in private  activity  bonds that may be subject to the federal
alternative minimum tax.

     The Fund takes social as well as  financial  factors into account in making
investment decisions. The Parnassus California Tax-Exempt Fund seeks a portfolio
that will have a positive  social and  environmental  impact.  Examples would be
bonds that support schools, libraries, hospitals, mass transit, low and moderate
income housing and pollution control facilities.


<PAGE>



Principal Risks of Investing in the California Tax-Exempt Fund
     Investing  in the  Fund  may  result  in a loss  of  money  when  you  sell
yourshares.  The Fund's  share  price  changes  daily  based on the value of its
holdings.  The Fund's average weighted  maturity will be five years or more. The
value of the Fund will  vary  inversely  with  changes  in  interest  rates.  As
interest  rates go up, the net asset  value  (NAV) will  likely go down,  and as
interest  rates  drop,  the NAV of the Fund will  likely go up. The Fund is also
subject to credit risk and market risk.  This Fund is intended for investors who
can  accept  the fact that there  will be  principal  fluctuations.  As the Fund
invests primarily in California  municipal  securities,  there are special risks
involved. The NAV of the Fund will be affected by factors such as changes to the
state  constitution  regarding  taxes,  changes  in the  federal  tax  status of
municipal  securities  and  changes  in bond  ratings  based  on the  California
economy.  When you sell your shares of the Fund,  they may be worth more or less
than what you paid for them.
Performance Information for the California Tax-Exempt Fund
     The bar chart below provides an indication of the risks of investing in the
Parnassus   California   Tax-Exempt  Fund  by  showing  changes  in  the  Fund's
performance from year to year over a seven-year  period.  How the Fund performed
in the past is not necessarily an indication of how the Fund will perform in the
future.

     [GRAPHIC OMITTED]


     During the seven-year period shown in the bar chart, the highest return for
a quarter was 8.0%  (quarter  ending March 31, 1995) and the lowest return for a
quarter was a loss of 5.7% (quarter ending March 31, 1994).

     Below is a table  comparing the  performance  of the  Parnassus  California
Tax-Exempt Fund with the Lehman Municipal Bond Index and the average  California
Municipal Bond Fund followed by Lipper,  Inc. Figures are average annual returns
for the one and five-year  periods and for the life of the Fund (since inception
on August 31, 1992).


<PAGE>




<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------
                                                                              Lipper California
Average Annual Total Returns       Parnassus California    Lehman Municipal    Municipal Bond
for periods ending 12/31/99           Tax-Exempt Fund         Bond Index        Fund Average
- --------------------------------------------------------------------------------------------------
<S>                                       <C>                   <C>                <C>
One Year                                  (2.01%)               (2.06%)            (5.16%)
Five Years                                 7.16%                 6.92%              6.10%
Since Inception 8/31/92                    5.88%                 5.91%              5.13%
- --------------------------------------------------------------------------------------------------
<FN>

     Past performance is no guarantee of future returns.  Investment  return and
principal will fluctuate and an investor's shares,  when redeemed,  may be worth
more or less than their original cost.

     The Lehman Municipal Bond Index is a recognized index measuring performance
of municipal bonds in the United States. An individual cannot invest directly in
the index and the index does not take into account investing  expenses as do the
figures  for the  Parnassus  California  Tax-Exempt  Fund and  Lipper's  average
California municipal bond fund.

</FN>
</TABLE>

TRUST EXPENSES
- --------------------------------------------------------------------------------
     This table  describes the fees and expenses that you may pay if you buy and
hold shares of the Trust.

<TABLE>
<CAPTION>
                                                           Equity        Fixed-     California
                                                           Income        Income    Tax- Exempt
Shareholder Fees (paid by the investor directly)            Fund          Fund         Fund
- -----------------------------------------------------------------------------------------------
<S>     <C>    <C>    <C>    <C>    <C>    <C>
Maximum Sales Charge (load) Imposed on Purchases            None          None         None
Redemption Fees                                             None          None         None

Annual Trust Operating Expenses (paid from Trust assets)
- -----------------------------------------------------------------------------------------------
Management Fees (before fee waiver)                         0.73%         0.50%        0.50%
12b-1/Distribution Fees                                     None          None         None
Other Expenses                                              0.54%         0.73%        0.45%
Total Annual Trust Operating Expenses                       1.27%         1.23%        0.95%
Expense Reimbursement                                       0.20%         0.36%        0.25%
Net Expenses                                                1.07%         0.87%        0.70%
</TABLE>


     The  "Total  Annual  Trust  Operating  Expenses"  indicated  in  the  table
overstate  the expenses you would  actually pay since they are based on expenses
before fee reimbursements and not on the Net Expenses.  However,  the Adviser is
contractually  obligated to limit the total operating expenses to 1.07%,  0.87%,
and 0.75% of the net assets of the Equity Income Fund,  the  Fixed-Income  Fund,
and the California  Tax-Exempt  Fund,  respectively.  The Adviser's  contractual
obligation is in place until December 31, 2000, after which date the Adviser may
discontinue the expense limit upon giving 30 days' prior notice to the Fund. The
SEC,  though,  requires that the  calculations  of Total Annual Trust  Operating
Expenses be made on the basis of pre-waiver expenses to show what expenses might
potentially be in the future.


<PAGE>


     The  examples  in this table are  intended  to help you compare the cost of
investing in the Trust with the cost of investing  in other  mutual  funds.  The
examples  assume  that you  invest  $10,000  in each of the  funds  for the time
periods  indicated  and  then  redeem  all of your  shares  at the end of  those
periods.  The Examples also assume that your  investments have a 5%* return each
year and that the  funds'  operating  expenses  remain the same.  Although  your
actual costs may be higher or lower, based on these assumptions, your cost would
be as follows:

<TABLE>
<CAPTION>
                                 One Year    Three Years  Five Years   Ten Years
<S>                                <C>          <C>          <C>        <C>
Equity Income Fund                 $129         $403         $697       $1,584
Fixed-Income Fund                  $125         $390         $676       $1,489
California Tax-Exempt Fund         $ 97         $303         $525       $1,166
</TABLE>

     The expenses  shown above are the total fees you would pay  throughout  the
time period  indicated -- not ones you would pay every year.  For  example,  the
figure for ten years is not the  expense  figure for that single  year,  but the
total cumulative  expenses a shareholder would have paid for the entire ten-year
period.

     From time to time, a fund may direct  brokerage  commissions  to firms that
may pay certain  expenses of a 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 fund's  shareholders.  No
fund  engaged  in such  directed  brokerage  in 1999.  If a fund  does so in the
future,  such directed  brokerage is expected to occur on an irregular basis, so
the  effect on the  expense  ratios  cannot  be  calculated  with any  degree of
certainty.

[FN]

     * The 5% return  figure is an example that  regulations  require all mutual
funds to use as an illustration. It should not be considered a representation of
past or future  performance.  Actual  performance and expenses may be greater or
lesser than those shown.

</FN>

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 OBJECTIVES AND POLICIES
- --------------------------------------------------------------------------------
Social Policy
     The Adviser looks for certain social policies in the companies in which the
Trust invests.  These social policies are: (1) treating  employees  fairly;  (2)
sound environmental protection policies; (3) a good equal employment opportunity
program;  (4) quality products and services;  (5) a record of civic  commitment;
and (6) ethical business practices. Obviously, no company will be perfect in all
categories,  but the Adviser makes value  judgments in deciding which  companies
best meet the criteria.  The Adviser also  considers  social  factors other than
these six (as  discussed  under the  investment  objectives of each of the three
Funds).

     Although the Trust emphasizes  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 Trust also  screens out
weapons contractors and those that generate electricity from nuclear power.

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


                               Equity Income Fund

     The  investment  objective of the Equity Income Fund is both current income
and capital appreciation.  The Fund tries to achieve this objective by investing
primarily in a diversified  portfolio of equity  securities.  Equity  securities
include common and preferred  stock as well as securities  that are  convertible
into these  instruments such as convertible  bonds. As an operating  policy,  at
least 75% of the  Fund's  total  assets  will  normally  be  invested  in equity
securities  that pay a dividend  (or  interest in the case of  convertible  debt
instruments),  and up to 25% of the  Fund's  total  assets  may be  invested  in
non-dividend paying equity securities, in investment grade debt securities or in
money market instruments.  However, for temporary,  defensive purposes, the Fund
may invest all its assets in money market  instruments or investment grade debt.

<PAGE>

"Investment  grade" means rated within the four highest categories as determined
by a nationally-recognized rating service such as S&P or Moody's.

     The Fund  seeks to  invest  in  equity  securities  that pay  above-average
dividends and which the Adviser believes have the capacity to raise dividends in
the future and also have the potential for capital appreciation.  The Fund seeks
to achieve a yield for its shareholders that exceeds the yield on the securities
comprising  the S&P 500  Composite  Stock Price Index.  Issuers of securities in
which the Fund invests must meet the social criteria stated in this Prospectus.

     The Equity Income Fund may, as an operating  policy,  also invest up to 10%
of its assets in  community  development  loan funds such as those that  provide
financing for small business and for 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,  the Fund may invest in  obligations  issued by community  loan funds at
below market interest rates.  Generally,  there is no secondary market, and thus
no liquidity,  for these  investments.  In general,  the Fund seeks to invest in
community  organizations that have had a successful record in making these kinds
of loans and that are deemed creditworthy by the Adviser.

Risk Factors
     As with all investments, there are a number of risk factors associated with
the Equity  Income Fund.  Equity  securities  in the Fund pose 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.  Also,  companies  that pay
dividends may not do so if they don't have profits or adequate cash flow.  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 Equity Income Fund invests  primarily in stocks
that pay a dividend,  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 is 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 Fund.

     Money   market   instruments   generally   limit   potential   for  capital
appreciation.  The  Fund's  investment  in  debt  securities  and  money  market
instruments  subjects it to other types of risks.  For more  information  on the
risks  associated  with debt  securities,  see the Risk  Factors  section  under
Fixed-Income Fund.

     There  are  also  special  risks   involved  with   community   development
investments  which may comprise as much as 10% of the Fund. These investments do
not have  liquidity,  and  community  loan  funds  do not 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 investments. In fact, one of the social objectives
of The Parnassus Income Trust is to establish a publicly  available track record
for community development investments.


<PAGE>


                                Fixed-Income Fund

     The  investment  objective  of the  Fixed-Income Fund is a high  level  of
current income  consistent with safety and preservation of capital.  The Adviser
seeks to achieve this objective by investing in a diversified portfolio of bonds
and other fixed-income  instruments that are rated investment grade.  Securities
in the lowest of the four investment  grade  categories (Baa or BBB, as rated by
Moody's and S&P,  respectively)  are considered  investment  grade, but they may
have speculative elements about them. The Fixed-Income Fund ordinarily will have
at least 65% of its net  assets in  securities  rated "A" or better  (i.e.,  the
three highest  categories) by S&P or Moody's.  See the Appendix in the SAI 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  Fund  may  invest  in  long-term,  intermediate-term  or
short-term  fixed-income  securities or any  combination  thereof,  depending on
market  conditions,  and these  securities  may also have  floating  or variable
interest rates. Securities in this Fund may include preferred stock, convertible
preferred stock and convertible bonds.

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

     This Fund may, as an operating policy,  also invest up to 10% of its assets
in community  development  loan funds. See the section on the Equity Income Fund
for details.

Risk  Factors
     The Fund's holdings,  share price,  yield and total return may fluctuate in
response to bond market movements. The Adviser anticipates that the Fixed-Income
Fund's average weighted maturity will be between 5 and 20 years. Because of this
relatively  long  maturity,  the value of this Fund  will  vary  inversely  with
changes in interest rates. As interest rates go up, the NAV will likely go down,
and as  interest  rates  drop,  the NAV of this Fund will  likely go up. This is
known as "interest rate risk." The Fund is subject to credit risk (the risk that
the default of an issuer would leave the Fund with unpaid interest or principal)
and market risk (the risk that the market value of an investment  may move up or
down, sometimes rapidly or unpredictably). The Fixed-Income Fund is intended for
investors who can accept the fact that there will be principal fluctuations. For
a description of risks associated with community development loan funds, see the
Risk Factors section in Equity Income Fund.


<PAGE>


                           California Tax-Exempt Fund

     The investment objective of the California  Tax-Exempt Fund is to provide a
high level of current  income exempt from both federal and  California  personal
income tax consistent with prudent  investment  management.  The Adviser pursues
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 Fund is for California residents only.

     For  temporary  purposes,  the Fund 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
Fund will put no more than 5% of its assets into any one fund.

     Normally,  the  Fund  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,  and the Fund may engage in repurchase transactions involving U.S.
Government securities.

Risk Factors
     Since the  California  Tax-Exempt  Fund  invests  primarily  in  California
municipal  securities,  there are special risks  involved.  Changes in the State
constitution  and other  laws  raise  questions  about the  ability of State and
municipal issuers to obtain sufficient revenue to pay their bond obligations. In
particular, 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.  Because the Fund will  concentrate  its  investments  in
California obligations,  the Fund is more susceptible to economic, political and
other  developments that may adversely affect issuers of California  obligations
than a municipal bond fund that is not as geographically concentrated. By way of
illustration,   although  California  has  a  relatively   diversified  economy,
California has concentrations in the computer services,  software design, motion
pictures and high technology manufacturing industries.  The Fund, therefore, may
be more susceptible to developments  affecting those industries than a municipal
bond fund that invests in obligations of several states.

     The Fund typically  invests 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 Fund will be adjusted accordingly.  The Fund is subject to credit
risk, market risk and interest rate risk (for a full description of these risks,
see Risk Factors in Fixed-Income Fund). In addition,  the Fund's investments may
be difficult to value  precisely  and sell at a desired time or price.  Also the
Fund may be affected if a  municipality  fails to include an obligation  held by
the Fund in future  budgets.  The  California  Tax-Exempt  Fund is intended  for
investors who can accept the fact that there will be principal fluctuations.


<PAGE>



MANAGEMENT

- -------------------------------------------------------------------------------

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

     Jerome  L.  Dodson*,  56,  President  and  Trustee,  is also  President  of
Parnassus  Investments.  From 1975 to 1982,  Mr.  Dodson served as President and
Chief  Executive  Officer of  Continental  Savings and Loan  Association  in San
Francisco.  From 1982 to 1984, he was President of Working Assets Money Fund and
he  also  served  as a  Trustee  from  1988 to  1991.  He is a  graduate  of the
University of California at Berkeley and of Harvard University's Graduate School
of Business  Administration  where he concentrated in finance. Mr. Dodson is the
Fund's  portfolio  manager.  He is also  President  and Trustee of The Parnassus
Fund.

     David  L.  Gibson,  60,  Trustee,   is  an  attorney  in  private  practice
specializing in taxation and personal financial planning.  From 1973 to 1984, he
was with the Crown  Zellerbach  Corporation  where he served as tax counsel and,
later, as Director of Public Affairs.  Mr. Gibson is active in civic affairs and
his special interests include senior citizens and environmental  protection.  He
holds a bachelor's degree in business  administration from Virginia  Polytechnic
Institute,  an MBA from Golden Gate  University,  a J.D. from Washington and Lee
University and an LLM from William and Mary. Mr. Gibson is also a Trustee of The
Parnassus Fund.

     Gail  L.  Horvath,  50,  Trustee,  is  co-owner  of  Just  Desserts,  a San
Francisco-based  bakery and cafe. A co-founder of Just Desserts,  her experience
includes market  research,  product planning and product  development.  For four
years,  she served as a director of  Continental  Savings of  America.  She is a
graduate  of  Ohio  State  University.  Ms.  Horvath  is also a  Trustee  of The
Parnassus Fund.

     Herbert A. Houston,  56, Trustee, is a health care consultant.  Previously,
he spent 12 years as the Chief  Executive  Officer  of the  Haight-Ashbury  Free
Clinics,  Inc. Mr.  Houston is on the Board of the Alameda County Medical Center
and is a Health  Commissioner for Alameda County. 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.  Mr. Houston is
also a Trustee of The Parnassus Fund.

     Cecilia C.M. Lee, 56, Trustee,  is President of  hybridArts.com,  a Silicon
Valley-based electronics firm. She is a San Francisco Asian Art commissioner and
serves on the board of public television  station KQED. Ms. Lee is a Director of
the Tech Museum of Innovation and the Asian-American  Manufacturers Association.
She is  also on the  Advancement  Board  of the  West  Valley-Mission  Community
College.  She  received a  bachelor's  degree  from the  National  Music and Art
Institute of Taiwan. Ms. Lee is also a Trustee of The Parnassus Fund.

     Leo T.  McCarthy,  69,  Trustee,  is  President  of  the  Daniel  Group,  a
partnership involved in foreign trade. His current  directorships include Linear
Technology,  Open Data  Systems  and the U.S.  National  Gambling  Impact  Study
Commission. He has also served as a Regent of the University of California. From
1969 to 1982, he served as a member of the California State Assembly,  six years
as Speaker.  From 1983 to 1995, he served as Lieutenant Governor of the State of
California where his major responsibility was economic  development.  He holds a
B.S.  from the  University  of San  Francisco  and a J.D. from San Francisco Law

<PAGE>

School and is licensed to practice  law in  California.  Mr.  McCarthy is also a
Trustee of The Parnassus Fund and a Director of the Forward Global Fund, another
mutual fund.

     Donald E. O'Connor,  63, Trustee, is a retired executive who spent 28 years
as Vice President of Operations for the Investment Company Institute, (the "ICI"
is the trade  association of the mutual fund industry).  During that period,  he
also  spent 10 years as Chief  Operating  Officer  of the ICI  Mutual  Insurance
Company.  Prior to joining the ICI,  he spent six years with the SEC,  including
four years as Branch  Chief of Market  Surveillance.  He  currently  serves as a
Trustee of the Advisors  Series Trust,  another mutual fund. He is a graduate of
The George Washington University and holds a Masters in Business  Administration
from the same institution. Mr. O'Connor is also a Trustee of The Parnassus Fund.

     Howard M. Shapiro, 68, 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 Chairman of the Board of the Portland Housing Authority and is
Vice  Chairman of the Board of the Albina  Community  Bank in Portland.  He also
serves on the Board of Oregon's State Accident  Insurance Fund and the Multnomah
County  Investment  Council.  Mr.  Shapiro is a graduate  of the  University  of
Washington.  He is also a Trustee of The  Parnassus  Fund.  He is no relation to
Joan Shapiro.

     Joan  Shapiro,  57,  Trustee,  is  a  consultant  in  development  banking,
community  reinvestment,  ethical investing and corporate social responsibility.
For 20 years, she worked with the South Shore Bank of Chicago,  most recently as
Executive Vice  President.  She is a former  President of the Social  Investment
Forum, the national trade association of the social investment industry.  Active
in  Chicago's  civic  and  cultural  life for 25  years,  she is a  Governor  of
International House of the University of Chicago and a member of the President's
Council of Cornell Women. She is a graduate of Cornell  University.  Ms. Shapiro
is also a Trustee of The Parnassus Fund. She is no relation to Howard Shapiro.

     Bryant Cherry, 35, Vice President and Treasurer, is also Vice President and
Treasurer  of  Parnassus  Investments.   Previously,   he  worked  for  Stanford
University's  Graduate School of Business,  Frank Rimerman & Co. Accountancy and
Merrill Lynch & Co. He is a graduate of Stanford University and holds a Master's
degree in accounting from San Jose State University.

     Susan Loughridge,  51, Vice President and Shareholder Services Manager. Ms.
Loughridge is a graduate of  University  of Arizona.  She began her career as an
examiner  for the  Federal  Home Loan Bank  Board and later  joined  Continental
Savings  where she  managed  Branch  Operations  until  1991.  She has served as
Shareholder Services Manager at Parnassus Investments since 1993. Ms. Loughridge
is also Vice President of The Parnassus Fund.

     Richard  D.  Silberman,  62,  Secretary,  is an  attorney  specializing  in
business law. He holds a bachelor's degree in business  administration  from the
University  of  Wisconsin,  a  Bachelor  of Law,  also  from the  University  of
Wisconsin and a Master of Law from Stanford  University.  He is a member of both
the  Wisconsin  and  California  Bars.  Mr.  Silberman is also  Secretary of The
Parnassus Fund.

[FN]

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

</FN>


<PAGE>


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

     For its services,  the Trust,  under an Investment  Advisory Agreement (the
"Agreement") between the Trust and the Adviser, pays the Adviser a fee, computed
and payable at the end of each month,  at the following  annual  percentages  of
each Fund's average daily net assets:  for the Equity Income Fund,  0.75% of the
first $30  million,  0.70% of the next $70 million and 0.65% of the amount above
$100 million; and for the Fixed-Income Fund and the California  Tax-Exempt Fund,
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.  However,  after taking into account the
Adviser's expense  reimbursement (more fully described below) the following were
actually  charged in 1999. For the Equity Income Fund,  the investment  advisory
fee was  0.53%.  Parnassus  Investments  received  net  advisory  fees  totaling
$229,333 from the Equity Income Fund for the year ended  December 31, 1999.  For
the  Fixed-Income  Fund,  the  investment  advisory  fee  was  0.14%.  Parnassus
Investments  received net advisory fees totaling  $16,392 from the  Fixed-Income
Fund for the year ended December 31, 1999. For the California  Tax-Exempt  Fund,
the  investment  advisory  fee was 0.25%.  Parnassus  Investments  received  net
advisory fees totaling $18,927 from the California  Tax-Exempt Fund for the year
ended December 31, 1999.

     Parnassus  Investments has agreed to reduce its investment  advisory fee to
the extent  necessary to limit total  operating  expenses to 1.07% of net assets
for the Equity Income Fund, 0.87% of net assets for the  Fixed-Income  Fund, and
0.75% of net assets for the California Tax-Exempt Fund.

     Jerome  L.  Dodson  is  the  portfolio  manager  of  each  Fund.  For  more
information about Mr. Dodson, please see "Management" above.


<PAGE>


                             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 Trust. It should be sent
to the Trust at the following  address.

                           The Parnassus Income Trust

                         One Market-Steuart Tower #1600

                         San Francisco, California 94105

     An initial  investment  must be at least $2,000 per fund except for certain
employee benefit plans or tax qualified retirement plans (such as IRAs or SEPs),
Parnassus  Automatic  Investment Plan (PAIP) and accounts opened pursuant to the
Uniform  Gifts to Minors  Act  ("UGMA")  or  Uniform  Transfers  to  Minors  Act
("UTMA"),  which have a $500 minimum.  Additional  investments  for all accounts
must be at least $50.  Parnassus  Investments  reserves  the right to reject any
order.  With  additional  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.  Investments  in the Equity Income Fund and the  California
Tax-Exempt  Fund,  if received  before 1:00 p.m.  San  Francisco  time,  will be
processed at the net asset value  calculated  on the same  business day they are
received.  If an investment in either of these Funds is received after 1:00 p.m.
San  Francisco  time,  it will be processed on the next  business  day. A fee of
$15.00 will be assessed if a check is returned to us unpaid due to  insufficient
funds, stop payment or for any other reason.

     An investment in the  Fixed-Income  Fund, if received before 12:00 noon San
Francisco time, will be processed at the net asset value  calculated on the same
business day it is received.  An investment  in this Fund  received  after 12:00
noon San Francisco time will be processed on the next business day.

Other  Information
     The Trust also offers additional  services to investors including plans for
the  systematic  investment and withdrawal of money as well as IRA, ROTH IRA and
SEP  plans.   Information   about  these  plans  is  available   from  Parnassus
Investments.

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


<PAGE>


Purchases Via Parnassus Automatic Investment Plan (PAIP)
     After making an initial investment to open a Fund account ($500 minimum), a
shareholder may purchase additional Fund shares ($50 minimum) via the 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 Trust and ask for the
free brochure called "Automatic  Investing and Dollar-Cost  Averaging." A fee of
$15.00  will be  assessed  if the  automatic  purchase  cannot  be  made  due to
insufficient funds, stop payment or for any other reason.

Net Asset Value
     The net asset value (NAV) for each fund will usually be calculated on every
day the New York Stock Exchange (NYSE) is open for trading  ("business day") and
on any other day there is a sufficient  degree of trading in investments held by
the Fund to affect the net asset value. The NYSE is closed on national  holidays
and Good Friday. The NAV of the Equity Income Fund and the California Tax-Exempt
Fund will usually be calculated as of the close of trading on the NYSE,  usually
4:00  p.m.  Eastern  time.  The NAV of the  Fixed-Income  Fund will  usually  be
determined  as of one hour prior to the close of  trading  on the NYSE,  usually
3:00 p.m.  Eastern time. The NAV 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 a fund's  assets,  less its
liabilities,  divided  by the  number of  outstanding  shares of that  fund.  In
general,  the value of a 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 Trust's Board of Trustees.


<PAGE>

HOW TO REDEEM SHARES
- --------------------------------------------------------------------------------
You may  sell or  redeem  your  shares  by  offering  them for  "repurchase"  or
"redemption"  directly to the Trust.  To sell your shares to the Trust (that is,
to redeem your shares),  you must send your written instructions to the Trust 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 NAV next determined after
receipt by the Trust of your  written  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  states that only one
signature is necessary for  redemptions.  All redemption  checks must be sent to
the address of record on the account. The Trust 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 Trust 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
require an  authorizing  document.  In the case of a surviving  joint owner,  we
usually require a copy of the death  certificate.  Contact the Trust by phone at
(800) 999-3505 if you have any questions about  requirements  for redeeming your
shares.

     If the Trust 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  Trust  will  promptly  send you a check  for the  proceeds  from the  sale.
Ordinarily, the Trust must send you a check within seven days unless the NYSE 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 Trust to determine  that the
purchase check will be honored.

     Exchange  Privileges.  The proceeds of a redemption of shares of a fund can
be used to purchase  shares of another  fund.  The proceeds of a  redemption  of
shares from a fund can also be used to purchase  shares of The  Parnassus  Fund,
but the purchase of  Parnassus  Fund shares will be subject to a sales charge if
no sales  charge was paid on the fund shares  redeemed.  If shares are  redeemed
from The Parnassus Fund and the proceeds invested in shares of the Trust,  there
will be no  additional  sales  charge if those Trust shares are redeemed and the
proceeds invested back into The Parnassus Fund.

     There is no limit on the number or dollar  amount of  exchanges.  The Trust
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 a fund into an
identically  registered  account in another fund or The Parnassus Fund.  Neither
the Trust 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 Trust 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 Trust and
Parnassus  Investments  may be liable  for any  losses  due to  unauthorized  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 Trust 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 Trust, 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 NAV  determined as of the close of business on the business day preceding
the sending of such notice of redemption. The Trust will give shareholders whose
shares are being  redeemed  60 days' prior  written  notice in which to purchase
sufficient shares to avoid such redemption.


<PAGE>


DIVIDENDS AND TAXES
- --------------------------------------------------------------------------------
     The Equity  Income  Fund  normally  declares  and pays  dividends  from net
investment  income ("income  dividends") on a quarterly  basis. The Fixed-Income
Fund  and the  California  Tax-Exempt  Fund  normally  declare  and  pay  income
dividends  on a  monthly  basis.  Dividends  from net  long-term  capital  gains
("capital gains  dividends") are paid once a year (usually in December) for each
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 Shareholders in Equity Income and Fixed-Income Funds
     For the Equity Income Fund and the  Fixed-Income  Fund,  all dividends from
net investment  income together with  distributions 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 gain distributions")  distributed to shareholders are taxable as
such.  An exchange of a fund's shares for shares of another fund will be treated
as a sale of a fund's  shares for tax purposes  and any gain on the  transaction
may be subject to state and federal  income  tax.  Tax-exempt  and  tax-deferred
shareholders, of course, will not be required to pay taxes on any dividends paid
to them.  Holders of IRAs and other  tax-deferred  retirement  accounts  are not
required to pay taxes until distribution.  (Tax-exempt  retirement accounts,  of
course, never have to pay taxes.)

     For shareholders of these funds, the Trust may be required to impose backup
withholding  at a rate  of  31%  from  any  income  dividend  and  capital  gain
distribution.  Shareholders can eliminate any backup withholding requirements by
furnishing  certification of U.S. 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 a fund, such dividends,
in the hands of that fund's corporate shareholders, will be eligible for the 70%
dividends received  deduction.  Individuals do not qualify for this deduction --
only corporations.

Taxation of Shareholders of California Tax-Exempt Fund
     This Fund 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.


<PAGE>


     Dividends derived from taxable interest and any distributions of short-term
capital gains are taxable to shareholders as ordinary  income.  Distributions of
net long-term  capital gains, if any, are taxable to shareholders as a long-term
capital  gain  regardless  of how long  their  shares of the Fund 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 capital gain dividends received
on such shares.

     The Fund will  notify  shareholders  each  January  as to the  federal  and
California   tax  status  of  dividends   paid  during  the  previous   calendar
year.

FINANCIAL  HIGHLIGHTS
- --------------------------------------------------------------------------------
     Selected data for each share of capital stock outstanding, total return and
ratios/supplemental  data for each of the five years  ended  December  31 are as
follows:

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------
Equity Income Fund                                         1999       1998      1997      1996      1995
- ----------------------------------------------------------------------------------------------------------
<S>                                                      <C>        <C>       <C>       <C>       <C>
Net asset value at beginning of year                     $20.13     $20.68    $18.56    $19.58     $15.70
Income from investment operations:
Net investment income                                      0.24       0.75      0.79      0.98       0.88
Net realized and unrealized gain (loss) on securities      4.26       1.49      2.86      0.37       3.93
     Total from investment operations                      4.50       2.24      3.65      1.35       4.81
Distributions:
Dividends from net investment income                      (0.26)     (0.73)    (0.79)    (0.97)    (0.90)
Distributions from net realized gains                     (1.24)     (2.06)    (0.74)    (1.40)    (0.03)
     Total distributions                                  (1.50)     (2.79)    (1.53)    (2.37)    (0.93)
Net asset value at end of year                           $23.13     $20.13    $20.68    $18.56    $19.58

Total return                                              22.78%     11.05%    20.15%     7.09%    31.13%
Ratios/supplemental data:
Ratio of expenses to average net assets (actual)*          1.08%      1.05%     1.05%     0.80%     0.72%
Decrease reflected in the above expense ratios due to
     undertakings by Parnassus Investments                 0.19%      0.24%     0.30%     0.60%     0.82%
Ratio of net investment income to average net assets       1.09%      2.30%     4.04%     4.56%     4.76%
Portfolio turnover rate                                   39.53%    166.32%    34.12%    47.80%    15.36%
Net assets, end of year (000's)                         $ 45,999   $ 40,903   $38,847  $ 33,362  $ 26,779


- -----------------------------------------------------------------------------------------------------------
</TABLE>


<PAGE>


<TABLE>
<CAPTION>

Fixed-Income Fund                                          1999       1998      1997      1996       1995
- -----------------------------------------------------------------------------------------------------------
<S>                                                      <C>        <C>       <C>       <C>        <C>
Net asset value at beginning of year                     $15.98     $16.04    $15.43    $15.73     $13.79
Income from investment operations:
Net investment income                                      0.81       0.84      0.90      0.92       0.95
Net realized and unrealized gain (loss) on securities    (1.49)       0.25      0.67     (0.31)      1.95
     Total from investment operations                    (0.68)       1.09      1.57      0.61       2.90
Distributions:
Dividends from net investment income                      (0.81)     (0.85)    (0.89)    (0.91)    (0.96)
Distributions from net realized gains                     (0.00)     (0.30)    (0.07)      .--       .--
     Total distributions                                  (0.81)     (1.15)    (0.96)    (0.91)    (0.96)
Net asset value at end of year                           $14.49     $15.98    $16.04    $15.43     $15.73
Total return                                             (4.32%)      6.97%    10.60%     4.08%    21.58%
Ratios/supplemental data:
Ratio of expenses to average net assets (actual)*          0.87%      0.79%     0.82%     0.83%     0.90%
Decrease reflected in the above expense ratios due to
     undertakings by Parnassus Investments                 0.36%      0.40%     0.43%     0.50%     0.73%
Ratio of net investment income to average net assets       5.36%      4.92%     5.79%     5.98%     6.20%
Portfolio turnover rate                                   13.47%     44.98%    17.15%     2.80%    12.10%
Net assets, end of year (000's)                        $  11,006   $ 11,482 $   9,683   $ 8,384   $ 6,585
</TABLE>


<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------
California Tax-Exempt Fund                                 1999       1998      1997      1996      1995
- -----------------------------------------------------------------------------------------------------------
<S>                                                      <C>        <C>       <C>       <C>        <C>
Net asset value at beginning of year                     $16.88     $16.72    $16.02    $16.06     $14.28
Income from investment operations:
Net investment income                                      0.72       0.75      0.74      0.80       0.82
Net realized and unrealized gain (loss) on securities    (1.05)       0.26      0.71     (0.06)      1.78
     Total from investment operations                    (0.33)       1.01      1.45      0.74       2.60
Distributions:
Dividends from net investment income                      (0.72)     (0.75)    (0.75)    (0.78)    (0.82)
Distributions from net realized gains                     (0.01)     (0.10)      .--       .--       .--
     Total distributions                                  (0.73)     (0.85)    (0.75)    (0.78)    (0.82)
Net asset value at end of year                           $15.82     $16.88    $16.72    $16.02    $16.06
     Total return                                        (2.01%)      6.12%     9.33%     4.78%    18.60%
Ratios/supplemental data:
Ratio of expenses to average net assets (actual)*          0.70%      0.67%     0.67%     0.54%     0.50%
Decrease reflected in the above expense ratios due to
     undertakings by Parnassus Investments                 0.25%      0.30%     0.32%     0.46%     0.69%
Ratio of net investment income to average net assets       4.42%      4.43%     4.69%     4.96%     5.30%
Portfolio turnover rate                                    1.75%      9.40%    10.00%      .--%    13.10%
Net assets, end of year (000's)                         $  7,777   $  7,342   $ 6,520   $ 5,835  $  4,483


<FN>

     * Parnassus  Investments  has agreed to a 1.25%  limit on expenses  for the
Equity Income Fund and 1% for the Fixed-Income and California  Tax-Exempt Funds.
Certain  fees were waived for the years ended  December 31,  1999,  1998,  1997,
1996,  and 1995.
     Note:  This  information  is taken  from  financial  statements  audited by
Deloitte & Touche LLP that were published in the Trust's 1999 annual report.
</FN>
</TABLE>


<PAGE>



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

     Union Bank of California,  475 Sansome Street, San Francisco, CA 94111, has
been selected as the custodian of the Trust's assets.

     Parnassus  Investments,  One  Market-Steuart  Tower #1600,  San  Francisco,
California 94105, is the Trust's transfer agent and accounting agent.  Jerome L.
Dodson, the Trust's President, is the sole stockholder of Parnassus Investments.


<PAGE>


                               Investment Adviser
                              Parnassus Investments
                         One Market-Steuart Tower #1600
                         San Francisco, California 94105
                                www.parnassus.com

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

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

                                  Legal Counsel
                            Gardner, Carton & Douglas
                            321 N. Clark Street #3300
                                Chicago, IL 60610

[FN]

    You can obtain additional information about The Parnassus Income Trust. A
Statement of Additional Information (SAl) dated May 1, 2000 has been filed with
the SEC and is incorporated in this prospectus by reference (i.e., legally forms
 a part of the prospectus). The Trust also publishes an annual and a semiannual
    report each year that discuss the Trust's holdings and how recent market
 conditions as well as the Trust's investment strategies affected performance.
 For a free copy of any of these documents or to ask questions about the Trust,
                 call Parnassus Investments at (800) 999-3505.

      The SAl, the Trust's annual and semiannual reports and other related
 materials are also available on the SEC's Internet site (http://www.sec.gov).
You can also obtain copies of this information upon paying a duplicating fee, by
 writing the Public Reference Section of the SEC, Washington, D.C. 20549-0102.
You can also review and copy information about the Trust, including the SAl, at
  the SEC's Public Reference Room in Washington, D.C. or making an electronic
    request at [email protected]. Call 202-942-8090 for information on the
operation of the SEC's Public Reference Room. The Investment Company Act of 1940
            File Number for The Parnassus Income Trust is 811-6673.

</FN>

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