JP MORGAN INSTITUTIONAL FUNDS
497, 1998-10-06
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<PAGE>
 
                                           FEBRUARY 2, 1998
                                                 AS REVISED    PROSPECTUS
                                            OCTOBER 1, 1998
- --------------------------------------------------------------------------------

J.P. MORGAN INSTITUTIONAL SERVICE MONEY MARKET FUNDS

Prime Money Market Fund

Treasury Money Market Fund

Federal Money Market Fund

Tax Exempt Money Market Fund

                                          --------------------------------------
                                          Seeking to provide high current income
                                          consistent with the preservation of
                                          capital and same-day liquidity





This prospectus contains essential 
information for anyone investing in 
these funds. Please read it carefully 
and keep it for reference.

Shares in these funds are not bank 
deposits and are not guaranteed or 
insured by any bank, government entity, 
or the FDIC. Each fund seeks to maintain 
a stable $1 share price, without 
guaranteeing that it will always be able 
to do so.

As with all mutual funds, the fact that 
these shares are registered with the
Securities and Exchange Commission does 
not mean that the commission approves
them as an investment or guarantees that 
the information in this prospectus is
correct or adequate. It is a criminal 
offense to state or suggest otherwise.

Distributed by Funds Distributor, Inc.                                 JPMorgan
<PAGE>
 
CONTENTS
- --------------------------------------------------------------------------------

                                                                               2

                                                Principles and techniques common
                                                 to the funds in this prospectus

MONEY MARKET MANAGEMENT APPROACH

Money market investment process ...........................................    2

The spectrum of money market funds ........................................    3

Money market funds and stability ..........................................    3


                                                                               4

                                          Each fund's goal, investment approach,
                                               risks, expenses, performance, and
                                                            financial highlights

J.P. MORGAN INSTITUTIONAL SERVICE MONEY MARKET FUNDS

J.P. Morgan Institutional Service Prime Money Market Fund .................    4

J.P. Morgan Institutional Service Treasury Money Market Fund ..............    6

J.P. Morgan Institutional Service Federal Money Market Fund ...............    8

J.P. Morgan Institutional Service Tax Exempt Money Market Fund ............   10


                                                                              12

                                      Investing in the J.P. Morgan Institutional
                                                      Service Money Market Funds

YOUR INVESTMENT

Investing through a service organization ..................................   12

Investing through an employer-sponsored retirement plan ...................   12

Investing through an IRA or rollover IRA ..................................   12

Investing directly ........................................................   12

Opening your account ......................................................   12

Adding to your account ....................................................   12

Selling shares ............................................................   13

Account and transaction policies ..........................................   13

Dividends and distributions ...............................................   14

Tax considerations ........................................................   14


                                                                              15

                                                           More about the funds'
                                                             business operations

FUND DETAILS

Master/feeder structure ...................................................   15

Management and administration .............................................   15

FOR MORE INFORMATION ................................................ back cover
<PAGE>
 
INTRODUCTION
- --------------------------------------------------------------------------------

J.P. MORGAN INSTITUTIONAL SERVICE MONEY MARKET FUNDS

Each of these funds invests in high-quality short-term debt securities by
investing through a master portfolio (another fund with the same goal). Each
fund accrues dividends daily, pays them to shareholders monthly, and seeks to
maintain a stable $1 share price.

WHO MAY WANT TO INVEST

The funds are designed for investors who:

o     want an investment that strives to preserve capital

o     want regular income from a high quality portfolio

o     want a highly liquid investment

o     are looking for an interim investment

o     are pursuing a short-term goal

o     are seeking income that is generally exempt from state and local income
      taxes (in the case of Service Federal Money Market Fund) or exempt from
      federal income tax (in the case of Service Tax Exempt Money Market Fund)

The funds are not designed for investors who:

o     are investing for long-term growth

o     are investing for high income

o     require the added security of the FDIC insurance

o     in the case of Service Tax Exempt Money Market Fund, are investing through
      an IRA or other tax-advantaged retirement plan

J.P. MORGAN

Known for its commitment to proprietary research and its disciplined investment
strategies, J.P. Morgan is the asset management choice for many of the world's
most respected corporations, financial institutions, governments, and
individuals. Today, J.P. Morgan employs over 300 analysts and portfolio managers
around the world and has approximately $275 billion in assets under management,
including assets managed by the funds' advisor, J.P. Morgan Investment
Management Inc.

- --------------------------------------------------------------------------------
Before you invest

Investors considering these funds should understand that:

o     There is no assurance that these funds will meet their investment goals

o     Future returns will not necessarily resemble past performance

o     These funds do not represent complete investment programs


                                                                             | 1
<PAGE>
 
MONEY MARKET MANAGEMENT APPROACH
- --------------------------------------------------------------------------------

The J.P. Morgan Institutional Service money market funds invest exclusively in
high-quality short-term debt obligations.

While each fund follows its own strategy, the funds as a group share a single
investment philosophy. This philosophy, developed by the funds' advisor,
emphasizes investment quality through in-depth research of short-term securities
and their issuers. This allows each fund to focus on providing current income
without compromising share price stability.

MONEY MARKET INVESTMENT PROCESS

In researching short-term securities, J.P. Morgan's credit analysts enhance the
data furnished by rating agencies by drawing on the insights of J.P. Morgan's
fixed income trading specialists and equity analysts. Only securities highly
rated by independent rating agencies as well as J.P. Morgan's proprietary
ratings system are considered for investment.

In managing the funds described in this prospectus, J.P. Morgan employs a
three-step process:

[GRAPHIC]

J.P. Morgan uses a disciplined process
to control each fund's sensitivity
to interest rates

Maturity determination  Based on analysis of a range of factors, including
current yields, economic forecasts, and anticipated fiscal and monetary
policies, J.P. Morgan establishes the desired weighted average maturity for each
fund within the permissible 90-day range. Controlling weighted average maturity
allows the funds to manage risk, since securities with shorter maturities are
typically less sensitive to interest rate shifts than those with longer
maturities.

[GRAPHIC]

The funds invest across different
sectors for diversification and to
take advantage of yield spreads

Sector allocation  Analysis of the yields available in different sectors of the
short-term debt market allows J.P. Morgan to adjust each fund's sector
allocation, with the goal of enhancing current income while also maintaining
diversification across permissible sectors.

[GRAPHIC]

Each fund selects its securities as
described later in this prospectus

Security selection  Based on the results of the firm's credit research and each
fund's maturity determination and sector allocation, the portfolio managers and
dedicated fixed-income traders make buy and sell decisions according to each
fund's goal and strategy.


2 | MONEY MARKET MANAGEMENT APPROACH
<PAGE>
 
- --------------------------------------------------------------------------------
THE SPECTRUM OF MONEY MARKET FUNDS

The funds described in this prospectus differ primarily in the types of
securities they hold and in the tax status of the income they offer. The table
below provides an overview of the main types of securities in which each fund
may invest. The distinguishing features of each money market fund are described
in more detail on the following pages.

- -------------------
Primary investments
- --------------------------------------------------------------------------------

================================================================================
                    Service     Service     Service     Service
                    Prime       Treasury    Federal     Tax Exempt
                    Money       Money       Money       Money
                    Market      Market      Market      Market
- --------------------------------------------------------------------------------
U.S.
Treasuries/*/         o           o           o
- --------------------------------------------------------------------------------
U.S.
Government
Agency
instruments           o                       o
- --------------------------------------------------------------------------------
Domestic
& foreign
bank
obligations           o
- --------------------------------------------------------------------------------
Domestic
& foreign
short-term
corporate
obligations           o
- --------------------------------------------------------------------------------
Foreign
governments           o
- --------------------------------------------------------------------------------
Illiquid
holdings              o
- --------------------------------------------------------------------------------
Repurchase
agreements            o           o
- --------------------------------------------------------------------------------
Tax-exempt
municipal
obligations/**/                                          o

/*/   Income is generally exempt from state and local income taxes

/**/  Income is generally exempt from federal income taxes

MONEY MARKET FUNDS AND STABILITY

Money market funds are subject to a range of federal regulations designed to
promote stability. For example, money market funds must maintain a weighted
average maturity of no more than 90 days, and generally may not invest in any
securities with a remaining maturity of more than 13 months. Keeping the
weighted average maturity this short helps funds in their pursuit of a stable $1
share price.


                                            MONEY MARKET MANAGEMENT APPROACH | 3
<PAGE>
 
J.P. MORGAN INSTITUTIONAL SERVICE 
PRIME MONEY MARKET FUND
- --------------------------------------------------------------------------------
                                     REGISTRANT: J.P. MORGAN INSTITUTIONAL FUNDS
                                     (J.P. MORGAN INSTITUTIONAL SERVICE PRIME 
                                     MONEY MARKET FUND)

[GRAPHIC]

GOAL

The fund's goal is to maximize current income consistent with the preservation
of capital and same-day liquidity. This goal can be changed without shareholder
approval.

[GRAPHIC]

INVESTMENT APPROACH

The fund looks for investments across a broad spectrum of U.S.
dollar-denominated money market securities, typically emphasizing different
types of securities at different times in order to take advantage of changing
yield differentials. The fund's investments may include obligations issued by
the U.S. Treasury, government agencies, domestic and foreign banks and
corporations, foreign governments, repurchase agreements, as well as
asset-backed securities, taxable municipal obligations, and other money market
instruments. Some of these investments may be illiquid or purchased on a
when-issued or delayed delivery basis.

[GRAPHIC]

POTENTIAL RISKS AND REWARDS

The fund's yield will vary in response to changes in interest rates. How well
the fund's yield compares to the yields of similar money market funds will
depend on the success of the investment process described on page 2.

As with all money market funds, the fund's investments are subject to various
risks, which, while generally considered to be minimal, could cause its share
price to fall below $1. For example, the issuer or guarantor of a portfolio
security or the counterparty to a contract could default on its obligation. An
unexpected rise in interest rates could also lead to a loss in share price if
the fund is near the maximum allowable average weighted maturity at the time. To
the extent that the fund invests in foreign securities, the fund could lose
money because of foreign government actions, political instability, or lack of
adequate and accurate information. Also, the fund may have difficulty valuing
its illiquid holdings and may be unable to sell them at the time or price it
desires. While these possibilities exist, the fund's investment process and
management policies are designed to minimize the likelihood and impact of these
risks. To date, through this process, the fund's share price has never deviated
from $1.

PORTFOLIO MANAGEMENT

The fund's assets are managed by J.P. Morgan, which currently manages
approximately $275 billion, including more than $12 billion using the same
strategy as the fund.

The portfolio management team is led by Robert R. Johnson, vice president, who
has been on the team since the fund's inception and has been at J.P. Morgan
since 1988, Daniel B. Mulvey, vice president, who joined the team in January of
1995 and has been at J.P. Morgan since 1991, and by John Donohue, vice
president, who has been on the team since joining J.P. Morgan in June of 1997.
Prior to managing this fund, Mr. Donohue was an Institutional Money Market
Portfolio Manager at Goldman Sachs & Co.

MONEY MARKET FUNDS AND STABILITY

Money market funds are subject to a range of federal regulations designed to
promote stability. For example, money market funds must maintain a weighted
average maturity of no more than 90 days, and generally may not invest in any
securities with a remaining maturity of more than 13 months. Keeping the
weighted average maturity this short helps funds in their pursuit of a stable $1
share price.

- --------------------------------------------------------------------------------
INVESTOR EXPENSES

The current expenses you should expect to pay as an investor in the fund are
shown at right. The fund has no sales, redemption, exchange, or account fees,
although some institutions may charge you a fee for shares you buy through them.
The annual fund expenses shown are deducted from fund assets prior to
performance calculations.

Footnotes for this section are shown on next page.

- --------------------------------------------------------------------------------
Annual fund operating expenses/1/                                           (%)
- --------------------------------------------------------------------------------
Management fees                                                             0.12
                                                                          
Marketing (12b-1) fees                                                      None
                                                                          
Other expenses/2/                                                         
(after reimbursement)                                                       0.08
                                                                          
Service fees/3/                                                             0.25
================================================================================
Total operating expenses/2/                                               
(after reimbursement)                                                       0.45
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Expense example
- --------------------------------------------------------------------------------
The example below uses the same assumptions as other fund prospectuses: $1,000
initial investment, 5% annual total return, expenses unchanged, all shares sold
at the end of each time period. The example is for comparison only; the fund's
actual return and expenses will be different.

- --------------------------------------------------------------------------------
                                                    1 yr.                 3 yrs.
Your cost($)                                         5                      14
- --------------------------------------------------------------------------------


4 | J.P. MORGAN INSTITUTIONAL SERVICE PRIME MONEY MARKET FUND
<PAGE>
 
- --------------------------------------------------------------------------------
PERFORMANCE (unaudited)

- -------------------------------
Average annual total return (%)         Shows performance over time, for periods
                                        ended December 31, 1997
- --------------------------------------------------------------------------------
                                                   1 yr.    5 yrs.    10 yrs.

J.P. Morgan Institutional Service 
 Prime Money Market Fund/4/ (after expenses)       5.41     4.63       5.73
- --------------------------------------------------------------------------------
IBC's First Tier Money Fund Average/5/
 (after expenses)                                  5.04     4.36       5.45
- --------------------------------------------------------------------------------

 [The following table was represented by a bar chart in the printed material.]

- -----------------------------
Year-by-year total return (%)          Shows changes in returns by calendar year
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                       1988     1989     1990     1991     1992     1993     1994     1995     1996     1997
<S>                                    <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C> 
J.P. Morgan Institutional Service
 Prime Money Market Fund/4/            7.38     9.13     8.04     6.07     3.67     2.83     3.95     5.79     5.21     5.41

IBC's First Tier Money Fund Average/5/ 7.08     8.87     7.82     5.71     3.37     2.70     3.75     5.48     4.85     5.04
</TABLE>

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

- --------------
Per-share data                              For fiscal periods ended November 30
- --------------------------------------------------------------------------------
                                                                     1997
                                                         
Net asset value, beginning of period ($)                             1.00
- --------------------------------------------------------------------------------
Income from investment operations:                       
  Net investment income ($)                                          0.0057
  Net realized loss                                      
  on investment ($)                                                 (0.0000)/6/
- --------------------------------------------------------------------------------
Total from investment operations ($)                                 0.0057
- --------------------------------------------------------------------------------
Less distributions to shareholders from:                 
  Net investment income ($)                                         (0.0057)
  Net realized gain ($)                                                --
- --------------------------------------------------------------------------------
Total distributions ($)                                             (0.0057)
- --------------------------------------------------------------------------------
Net asset value, end of period ($)                                   1.00
- --------------------------------------------------------------------------------
Total return (%)                                                     0.57/7/ 
- --------------------------------------------------------------------------------
                                                         
- ----------------------------                             
Ratios and supplemental data                             
- --------------------------------------------------------------------------------
                                                         
Net assets, end of period ($ thousands)                               384
- --------------------------------------------------------------------------------
Ratio to average net assets:                             
Expenses (%)                                                         0.45/8/
- --------------------------------------------------------------------------------
Net investment income (%)                                            5.28/8/
- --------------------------------------------------------------------------------
Decrease reflected in expense ratio due                  
to expense reimbursement8 (%)                                       35.10/8,9/
- --------------------------------------------------------------------------------

The Financial Highlights above have been audited by PricewaterhouseCoopers LLP,
the fund's independent accountants.

1     The fund has a master/feeder structure as described on page 15. This table
      shows the fund's expenses and its share of master portfolio expenses for
      the past fiscal year, expressed as a percentage of the fund's average net
      assets after reimbursement for ordinary expenses over 0.45%.

2     Without reimbursement, other expenses and total operating expenses would
      have been 35.18% and 35.55%, respectively. There is no guarantee that
      reimbursement will continue beyond 3/31/99.

3     Service Organizations may charge other fees to their customers who are the
      beneficial owners of shares in connection with their customers' accounts.
      Such fees, if any, may affect the return such customers realize with
      respect to their investments.

4     The fund commenced operations on 10/23/97. Except in Financial Highlights,
      returns reflect performance of the J.P. Morgan Prime Money Market Fund (a
      separate feeder fund investing in the same master portfolio) from 1/1/88
      through 10/23/97. These returns reflect lower operating expenses than the
      fund's. Also, these returns may be higher than the fund's would have been
      had it existed during the same periods. This data is based on historical
      earnings and is not intended to indicate future performance.

5     Consists of the IBC/Donoghue Taxable Money Market Fund Average from
      inception through November 30, 1995 and IBC's First Tier Money Fund
      Average thereafter.

6     Less than $0.0001.

7     Not annualized.

8     Annualized.

9     Not representative of ongoing reimbursement ratio since period covers less
      than two months.


                   J.P. MORGAN INSTITUTIONAL SERVICE PRIME MONEY MARKET FUND | 5
<PAGE>
 
J.P. MORGAN INSTITUTIONAL SERVICE
TREASURY MONEY MARKET FUND           TICKER SYMBOL: JPMXX
- --------------------------------------------------------------------------------
                                     REGISTRANT: J.P. MORGAN INSTITUTIONAL FUNDS
                                     (J.P. MORGAN INSTITUTIONAL SERVICE TREASURY
                                     MONEY MARKET FUND)

[GRAPHIC]

GOAL

The fund's goal is to provide high current income consistent with the
preservation of capital and same-day liquidity. This goal can be changed without
shareholder approval.

[GRAPHIC]

INVESTMENT APPROACH

The fund purchases securities that offer the highest credit quality and provide
regular income. It invests exclusively in U.S. Treasury obligations and
repurchase agreements collateralized by these obligations. Some of these
investments may be purchased on a when-issued or delayed delivery basis.

[GRAPHIC]

POTENTIAL RISKS AND REWARDS

The fund's yield will vary in response to changes in interest rates. How well
the fund's yield compares to the yields of similar money market funds will
depend on the success of the investment process described on page 2.

While the fund's U.S. Treasury obligations are backed by the full faith and
credit of the federal government, investors should bear in mind that any
repurchase agreements the fund may hold do not have this guarantee (even though
they are fully collateralized by Treasuries), and that in any case, government
guarantees do not extend to shares of the fund itself.

The portion of the fund's income derived from direct investments in U.S.
Treasury obligations may be exempt from state and local personal income taxes.

PORTFOLIO MANAGEMENT

The fund's assets are managed by J.P. Morgan, which currently manages
approximately $275 billion, including more than $12 billion using the same
strategy as the fund.

The portfolio management team is led by Robert R. Johnson, vice president, who
has been on the team since the fund's inception and has been at J.P. Morgan
since 1988, Daniel B. Mulvey, vice president, who joined the team in January of
1995 and has been at J.P. Morgan since 1991, and by John Donohue, vice
president, who has been on the team since joining J.P. Morgan in June of 1997.
Prior to managing this fund, Mr. Donohue was an Institutional Money Market
Portfolio Manager at Goldman Sachs & Co.

MONEY MARKET FUNDS AND STABILITY

Money market funds are subject to a range of federal regulations designed to
promote stability. For example, money market funds must maintain a weighted
average maturity of no more than 90 days, and generally may not invest in any
securities with a remaining maturity of more than 13 months. Keeping the
weighted average maturity this short helps funds in their pursuit of a stable $1
share price.

- --------------------------------------------------------------------------------
INVESTOR EXPENSES

The current expenses you should expect to pay as an investor in the fund are
shown at right. The fund has no sales, redemption, exchange, or account fees,
although some institutions may charge you a fee for shares you buy through them.
The annual fund expenses shown are deducted from fund assets prior to
performance calculations.

Footnotes for this section are shown on next page.

- --------------------------------------------------------------------------------
Annual fund operating expenses/1/                                           (%)
- --------------------------------------------------------------------------------
Management fees/2/
(after expense reimbursement)                                               0.11

Marketing (12b-1) fees                                                      None

Other expenses/2/
(after reimbursement)                                                       None

Service fees/3/                                                             0.25
================================================================================
Total operating expenses/2/
(after reimbursement)                                                       0.36
- --------------------------------------------------------------------------------


- --------------------------------------------------------------------------------
Expense example
- --------------------------------------------------------------------------------
The example below uses the same assumptions as other fund prospectuses: $1,000
initial investment, 5% annual total return, expenses unchanged, all shares sold
at the end of each time period. The example is for comparison only; the fund's
actual return and expenses will be different.

- --------------------------------------------------------------------------------
                                                          1 yr.        3 yrs.

Your cost($)                                                4           14
- --------------------------------------------------------------------------------

6 | J.P. MORGAN INSTITUTIONAL SERVICE TREASURY MONEY MARKET FUND
<PAGE>
 
- --------------------------------------------------------------------------------
PERFORMANCE (unaudited)

- -------------------------------
Average annual total return (%)    Shows performance over time, for period ended
                                   December 31, 1997
- --------------------------------------------------------------------------------
                                                              Since inception/4/

J.P. Morgan Institutional Service Treasury 
 Money Market Fund (after expenses)                                   2.24
- --------------------------------------------------------------------------------
IBC's U.S. Treasury & Repo Money Fund Average                         2.00
- --------------------------------------------------------------------------------

 [The following table was represented by a bar chart in the printed material.]

- -----------------------------
Year-by-year total return (%)          Shows changes in returns for period ended
                                       December 31, 1997
- --------------------------------------------------------------------------------
                                                                Since inception

J.P. Morgan Institutional Service Treasury Money Market Fund          2.24

IBC's U.S. Treasury & Repo Money Fund Average                         2.00

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

- --------------
Per-share data                                For fiscal period ended October 31
- --------------------------------------------------------------------------------
                                                                      1997

Net asset value, beginning of period ($)                             1.00
- --------------------------------------------------------------------------------
Income from investment operations:
  Net investment income ($)                                          0.0169
  Net realized gain on investment ($)                                0.0000/5/
================================================================================
Total from investment operations ($)                                 0.0169
- --------------------------------------------------------------------------------
Less distributions to shareholders from:
  Net investment income ($)                                          0.0169
  Net realized gain ($)                                              0.0000/5/
================================================================================
Total distributions ($)                                              0.0169
- --------------------------------------------------------------------------------
Net asset value, end of period ($)                                   1.00
- --------------------------------------------------------------------------------
Total return (%)                                                     1.71/6/
- --------------------------------------------------------------------------------

- -----------------------------
Ratios and supplemental data
- --------------------------------------------------------------------------------
Net assets, end of period ($ thousands)                             35,983
- --------------------------------------------------------------------------------
Ratio to average net assets:
Expenses (%)                                                         0.28/7/
- --------------------------------------------------------------------------------
Net investment income (%)                                            5.29/7/
- --------------------------------------------------------------------------------
Decrease reflected in expense ratio due
to expense reimbursement (%)                                         1.43/7/
- --------------------------------------------------------------------------------

The Financial Highlights above have been audited by PricewaterhouseCoopers LLP,
the fund's independent accountants.

1     The fund has a master/feeder structure as described on page 15. Due to the
      fund's blended expense limitation (as described in footnote 2), this table
      shows the fund's expenses and its share of master portfolio expenses for
      the current fiscal year ending 10/31/98, expressed as a percentage of the
      fund's average net assets after reimbursement for ordinary expenses over
      0.36%.

2     The total operating expenses for the fund is subject to a blended expense
      limitation which requires various reimbursements through 10/31/98 (see
      "Management and Administration") and may not necessarily represent the
      actual amount incurred by a shareholder. Without reimbursement, the
      advisory fee, other expenses and total operating expenses are estimated to
      be 0.20%, 0.18% and 0.63%, respectively for the current fiscal year. There
      is no guarantee that reimbursement will continue beyond 2/28/99.

3     Service Organizations may charge other fees to their customers who are the
      beneficial owners of shares in connection with their customers' accounts.
      Such fees, if any, may affect the return such customers realize with
      respect to their investments.

4     The fund commenced operations on 7/7/97and performance is calculated as of
      7/31/97. This data is based on historical earnings and is not intended to
      indicate future performance.

5     Less than $0.0001.

6     Not annualized.

7     Annualized.


                J.P. MORGAN INSTITUTIONAL SERVICE TREASURY MONEY MARKET FUND | 7
<PAGE>
 
J.P. MORGAN INSTITUTIONAL SERVICE
FEDERAL MONEY MARKET FUND
- --------------------------------------------------------------------------------
                                     REGISTRANT: J.P. MORGAN INSTITUTIONAL FUNDS
                                     (J.P. MORGAN INSTITUTIONAL SERVICE FEDERAL 
                                     MONEY MARKET FUND)

[GRAPHIC]

GOAL

The fund's goal is to provide high current income consistent with the
preservation of capital and same-day liquidity. This goal can be changed without
shareholder approval.

[GRAPHIC]

INVESTMENT APPROACH

The fund purchases securities that offer very high credit quality and pay
regular income that is generally free from state and local income taxes. It
invests exclusively in U.S. government agency obligations such as the Federal
Farm Credit Bank, the Tennessee Valley Authority, the Federal Home Loan Bank,
the Student Loan Marketing Association, and in obligations of the U.S. Treasury.
Some of these investments may be purchased on a when-issued or delayed delivery
basis.

[GRAPHIC]

POTENTIAL RISKS AND REWARDS

The fund's yield will vary in response to changes in interest rates. How well
the fund's yield compares to the yields of similar money market funds will
depend on the success of the investment process described on page 2.

While the fund's U.S. Treasury obligations are backed by the full faith and
credit of the Government, investors should bear in mind that any agency
obligations the fund may hold do not have this guarantee, and that in any case
government guarantees do not extend to shares of the fund itself.

Most of the fund's income is generally exempt from state and local personal
income taxes and from some corporate income taxes (although not federal income
taxes). Because of this beneficial tax status, the fund's yields are generally
lower than those of taxable money market funds when compared on a pre-tax basis.

As with all money market funds, the fund's investments are subject to various
risks, which, while generally considered to be minimal, could cause its share
price to fall below $1. For example, the issuer or guarantor of a portfolio
security could default on its obligation. An unexpected rise in interest rates
could also lead to a loss in share price if the fund is near the maximum
allowable average weighted maturity at the time. However, the fund's investment
process and management policies are designed to minimize the likelihood and
impact of these risks. To date, through this process, the fund's share price has
never deviated from $1.

PORTFOLIO MANAGEMENT

The fund's assets are managed by J.P. Morgan, which currently manages
approximately $275 billion, including more than $12 billion using the same
strategy as the fund.

The portfolio management team is led by Robert R. Johnson, vice president, who
has been on the team since the fund's inception and has been at J.P. Morgan
since 1988, Daniel B. Mulvey, vice president, who joined the team in January of
1995 and has been at J.P. Morgan since 1991, and by John Donohue, vice
president, who has been on the team since joining J.P. Morgan in June of 1997.
Prior to managing this fund, Mr. Donohue was an Institutional Money Market
Portfolio Manager at Goldman Sachs & Co.

MONEY MARKET FUNDS AND STABILITY

Money market funds are subject to a range of federal regulations designed to
promote stability. For example, money market funds must maintain a weighted
average maturity of no more than 90 days, and generally may not invest in any
securities with a remaining maturity of more than 13 months. Keeping the
weighted average maturity this short helps funds in their pursuit of a stable $1
share price.

- --------------------------------------------------------------------------------
INVESTOR EXPENSES

The current expenses you should expect to pay as an investor in the fund are
shown at right. The fund has no sales, redemption, exchange, or account fees,
although some institutions may charge you a fee for shares you buy through them.
The annual fund expenses shown are deducted from fund assets prior to
performance calculations.

Footnotes for this section are shown on next page.

- --------------------------------------------------------------------------------
Annual fund operating expenses/1/                                           (%)
- --------------------------------------------------------------------------------
Management fees                                                             0.20

Marketing (12b-1) fees                                                      None

Other expenses/2/
(after reimbursement)                                                       None

Service fees/3/                                                             0.25
================================================================================
Total operating expenses/2/
(after reimbursement)                                                       0.45
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Expense example
- --------------------------------------------------------------------------------
The example below uses the same assumptions as other fund prospectuses: $1,000
initial investment, 5% annual total return, expenses unchanged, all shares sold
at the end of each time period. The example is for comparison only; the fund's
actual return and expenses will be different.

- --------------------------------------------------------------------------------
                                                                 1 yr.    3 yrs.

Your cost($)                                                       5       14
- --------------------------------------------------------------------------------

8 | J.P. MORGAN INSTITUTIONAL SERVICE FEDERAL MONEY MARKET FUND
<PAGE>
 
- --------------------------------------------------------------------------------
PERFORMANCE (unaudited)

- -------------------------------
Average annual total return (%)   Shows performance over time, for periods ended
                                  December 31, 1997
- --------------------------------------------------------------------------------
                                       1 yr.   3 yrs.    Since inception

J.P. Morgan Institutional Service 
 Federal Money Market Fund/4/          5.18     5.25         4.45
- --------------------------------------------------------------------------------
IBC's U.S. Government & Agency 
 Money Market Fund Average/5/
 (after expenses)                      4.83     4.89         4.18
- --------------------------------------------------------------------------------

 [The following table was represented by a bar chart in the printed material.]

- -----------------------------
Year-by-year total return (%)          Shows changes in returns by calendar year
- --------------------------------------------------------------------------------
                                              1994      1995      1996      1997
J.P. Morgan Institutional Service
 Federal Money Market Fund/4/                 3.78      5.59      4.99      5.18

IBC's U.S. Government & Agency
 Money Market Fund Average/5/                 3.52      5.19      4.67      4.83

/1/   The fund has a master/feeder structure as described on page 15. This table
      shows the fund's estimated expenses and its estimated share of master
      portfolio expenses for the current fiscal year, expressed as a percentage
      of the fund's estimated average net assets after reimbursement for
      ordinary expenses over 0.45%.

/2/   Without reimbursement, other expenses and total operating expenses are
      estimated to have been 0.26% and 0.71%, respectively. There is no
      guarantee that reimbursement will continue beyond 2/28/99.

/3/   Service Organizations may charge other fees to their customers who are the
      beneficial owners of shares in connection with their customers' accounts.
      Such fees, if any, may affect the return such customers realize with
      respect to their investments.

/4/   The fund commenced operations on 11/6/97. Returns reflect performance of
      the J.P. Morgan Federal Money Market Fund (a separate feeder fund
      investing in the same master portfolio) from 1/31/93 through 11/6/97. This
      data is based on historical earnings and is not intended to indicate
      future performance.

/5/   Consists of the IBC/Donoghue U.S. Treasury & Repo Money Market Fund
      Average through 12/31/95 and IBC's U.S. Government & Agency Money Market
      Fund Average thereafter.


                 J.P. MORGAN INSTITUTIONAL SERVICE FEDERAL MONEY MARKET FUND | 9
<PAGE>
 
J.P. MORGAN INSTITUTIONAL SERVICE
TAX EXEMPT MONEY MARKET FUND
- --------------------------------------------------------------------------------
                                     REGISTRANT: J.P. MORGAN INSTITUTIONAL FUNDS
                                     (J.P. MORGAN INSTITUTIONAL SERVICE TAX 
                                     EXEMPT MONEY MARKET FUND)

[GRAPHIC]

GOAL

The fund's goal is to maximize current income that is exempt from federal income
tax consistent with the preservation of capital and same-day liquidity. This
goal can be changed without shareholder approval.

[GRAPHIC]

INVESTMENT APPROACH

The fund invests primarily in high quality municipal obligations whose income is
exempt from federal income taxes. The fund's municipal obligations must fall
into the highest short-term rating category (top two highest categories for New
York State obligations) or be of equivalent quality. The fund may also invest in
certain structured municipal obligations, and in certain municipal or other
obligations whose income is subject to tax, including the alternative minimum
tax. Although the fund is permitted to hold these other obligations or cash, it
aims to be fully invested in municipal obligations. In order to maintain
liquidity, the fund may buy securities with puts that allow the fund to
liquidate the securities on short notice. Some of the fund's securities may be
purchased on a when-issued or delayed delivery basis.

[GRAPHIC]

POTENTIAL RISKS AND REWARDS

The fund's yield will vary in response to changes in interest rates. How well
the fund's yield compares to the yields of similar money market funds will
depend on the success of the investment process described on page 2.

As with all money market funds, the fund's investments are subject to various
risks, which, while generally considered to be minimal, could cause its share
price to fall below $1. For example, the issuer or guarantor of a portfolio
security or the counterparty to a contract could default on its obligation. An
unexpected rise in interest rates could also lead to a loss in share price if
the fund is near the maximum allowable average weighted maturity at the time.
However, the fund's investment process and management policies are designed to
minimize the likelihood and impact of these risks. To date, through this
process, the fund's share price has never deviated from $1.

The fund's income is generally exempt from federal income taxes. A small portion
may be exempt from state or local income taxes.

PORTFOLIO MANAGEMENT

The fund's assets are managed by J.P. Morgan, which currently manages
approximately $275 billion, including more than $12 billion using the same
strategy as the fund.

The portfolio management team is led by Daniel B. Mulvey, vice president, who
has been on the team since August of 1995 and has been at J.P. Morgan since
1991, and by Richard W. Oswald, vice president, who has been on the team since
joining J.P. Morgan in October of 1996. Prior to managing this fund, Mr. Oswald
served as Treasurer of CBS and President of its finance unit.

MONEY MARKET FUNDS AND STABILITY

Money market funds are subject to a range of federal regulations designed to
promote stability. For example, money market funds must maintain a weighted
average maturity of no more than 90 days, and generally may not invest in any
securities with a remaining maturity of more than 13 months. Keeping the
weighted average maturity this short helps funds in their pursuit of a stable $1
share price.

- --------------------------------------------------------------------------------
INVESTOR EXPENSES

The current expenses you should expect to pay as an investor in the fund are
shown at right. The fund has no sales, redemption, exchange, or account fees,
although some institutions may charge you a fee for shares you buy through them.
The annual fund expenses shown are deducted from fund assets prior to
performance calculations.

Footnotes for this section are shown on next page.

- --------------------------------------------------------------------------------
Annual fund operating expenses/1/                                           (%)
- --------------------------------------------------------------------------------
Management fees                                                             0.18

Marketing (12b-1) fees                                                      None

Other expenses/2/
(after waiver and reimbursement)                                            0.17

Service fees/3/                                                             0.25
================================================================================
Total operating expenses/2/
(after reimbursement)                                                       0.60
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Expense example
- --------------------------------------------------------------------------------
The example below uses the same assumptions as other fund prospectuses: $1,000
initial investment, 5% annual total return, expenses unchanged, all shares sold
at the end of each time period. The example is for comparison only; the fund's
actual return and expenses will be different.

- --------------------------------------------------------------------------------
                                                            1 yr.       3 yrs.

Your cost($)                                                  6           19
- --------------------------------------------------------------------------------

10 | J.P. MORGAN INSTITUTIONAL SERVICE TAX EXEMPT MONEY MARKET FUND
<PAGE>
 
- --------------------------------------------------------------------------------
PERFORMANCE (unaudited)

- -------------------------------
Average annual total return (%)         Shows performance over time, for periods
                                        ended December 31, 1997
- --------------------------------------------------------------------------------
                                                        1 yr.   5 yrs.   10 yrs.

J.P. Morgan Institutional Service 
 Tax Exempt Money Market Fund/4/                        3.26     2.89     3.78
- --------------------------------------------------------------------------------
IBC's Tax Exempt Money Market Fund 
 Average/5/ (after expenses)                            3.09     2.72     3.65
- --------------------------------------------------------------------------------

 [The following table was represented as a bar chart in the printed material.]

- -----------------------------
Year-by-year total return (%)          Shows changes in returns by calendar year
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                              1988     1989     1990     1991     1992     1993     1994     1995     1996     1997
<S>                                           <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C> 
J.P. Morgan Institutional Service
 Tax Exempt Money Market Fund/4/              4.93     6.11     5.58     4.16     2.71     2.04     2.50     3.52     3.12     3.26

IBC's Tax Exempt Money Market Fund Average/5/ 4.80     5.91     5.49     4.17     2.56     1.93     2.34     3.34     2.93     3.09
</TABLE>

1     The fund has a master/feeder structure as described on page 15. This table
      shows the fund's estimated expenses and its share of estimated master
      portfolio expenses for the current fiscal year, expressed as a percentage
      of the fund's average net assets after reimbursement for ordinary expenses
      over 0.60%.

2     Without such waiver and reimbursement, other expenses and total operating
      expenses would have been 299.11% and 299.52%, respectively. There is no
      guarantee that this arrangement will continue beyond 12/31/98.

3     Service Organizations may charge other fees to their customers who are the
      beneficial owners of shares in connection with their customers' accounts.
      Such fees, if any, may affect the return such customers realize with
      respect to their investments.

4     The fund commenced operations on 11/4/97. Returns reflect performance of
      the J.P. Morgan Tax Exempt Money Market Fund (a separate feeder fund
      investing in the same master portfolio) from 1/1/88 through 11/4/97. These
      returns reflect lower operating expenses than the fund's. Also, these
      returns may be higher than the fund's would have been had it existed
      during the same periods. This data is based on historical earnings and is
      not intended to indicate future performance.

5     IBC's Tax Exempt Money Market Fund Average is an average of all major tax
      free money market fund returns.

             J.P. Morgan Institutional Service Tax Exempt Money Market Fund | 11
<PAGE>
 
YOUR INVESTMENT
- --------------------------------------------------------------------------------

For your convenience, the J.P. Morgan Institutional Funds offer several ways to
start and add to fund investments.

INVESTING THROUGH A SERVICE ORGANIZATION

Prospective investors may purchase shares of each fund with the assistance of a
service organization. Your service organization is paid by the fund to assist
you in establishing your fund account, executing transactions, and monitoring
your investment. If your fund investment is not held in the name of your service
organization and you prefer to place a transaction order yourself, please use
the instructions for investing directly.

INVESTING THROUGH AN EMPLOYER-SPONSORED RETIREMENT PLAN 

Your fund investments are handled through your plan. Refer to your plan
materials or contact your benefits office for information on buying, selling, or
exchanging fund shares.

INVESTING THROUGH AN IRA OR ROLLOVER IRA

Please contact a J.P. Morgan Retirement Services Specialist at 1-888-576-4472
for information on J.P. Morgan's comprehensive IRA services, including lower
minimum investments.

INVESTING DIRECTLY

Investors may establish accounts without the help of an intermediary by using
the instructions below and at right:

o     Determine the amount you are investing. The minimum amount for initial
      investments in a fund is $10,000,000 and for additional investments
      $25,000, although these minimums may be less for some investors. A service
      organization may impose a minimum amount for initial and subsequent
      investments in a fund and may establish other requirements such as a
      minimum account balance. Customers should contact their service
      organization for further information concerning such requirements and
      charges. For more information on minimum investments, call 1-800-766-7722.

o     Complete the application, indicating how much of your investment you want
      to allocate to which fund(s). Please apply now for any account privileges
      you may want to use in the future, in order to avoid the delays associated
      with adding them later on.

o     Mail in your application, making your initial investment as shown below.

For answers to any questions, please speak with a J.P. Morgan Funds Services
Representative at 1-800-766-7722.

OPENING YOUR ACCOUNT

By wire

o     Mail your completed application to the Shareholder Services Agent.

o     Call the Shareholder Services Agent to obtain an account number and to
      place a purchase order. Funds that are wired without a purchase order will
      be returned uninvested.

o     After placing your purchase order, instruct your bank to wire the amount
      of your investment to:

      Morgan Guaranty Trust Company of New York
      Routing number: 021-000-238
      Credit: J.P. Morgan Institutional Funds
      Account number: 001-57-689
      FFC: your account number, name of registered owner(s) and fund name

By check

o     Make out a check for the investment amount payable to J.P. Morgan
      Institutional Funds.

o     Mail the check with your completed application to the Shareholder Services
      Agent.

By exchange

o     Call the Shareholder Services Agent to effect an exchange.

ADDING TO YOUR ACCOUNT

By wire

o     Call the Shareholder Services Agent to place a purchase order. Funds that
      are wired without a purchase order will be returned uninvested.

o     Once you have placed your purchase order, instruct your bank to wire the
      amount of your investment as described above.

By check

o     Make out a check for the investment amount payable to J.P. Morgan
      Institutional Funds.

o     Mail the check with a completed investment slip to the 


12 | YOUR INVESTMENT
<PAGE>
 
      Shareholder Services Agent. If you do not have an investment slip, attach
      a note indicating your account number and how much you wish to invest in
      which fund(s).

By exchange

o     Call the Shareholder Services Agent to effect an exchange.

SELLING SHARES

By phone -- wire payment

o     Call the Shareholder Services Agent to verify that the wire redemption
      privilege is in place on your account. If it is not, a representative can
      help you add it.

o     Place your wire request. If you are transferring money to a non-Morgan
      account, you will need to provide the representative with the personal
      identification number (PIN) that was provided to you when you opened your
      fund account.

By phone -- check payment

o     Call the Shareholder Services Agent and place your request. Once your
      request has been verified, a check for the net amount, payable to the
      registered owner(s), will be mailed to the address of record. For checks
      payable to any other party or mailed to any other address, please make
      your request in writing (see below).

In writing

o     Write a letter of instruction that includes the following information: The
      name of the registered owner(s) of the account; the account number; the
      fund name; the amount you want to sell; and the recipient's name and
      address or wire information, if different from those of the account
      registration.

o     Indicate whether you want the proceeds sent by check or by wire.

o     Make sure the letter is signed by an authorized party. The Shareholder
      Services Agent may require additional information, such as a signature
      guarantee.

o     Mail the letter to the Shareholder Services Agent.

By exchange

o     Call the Shareholder Services Agent to effect an exchange.

ACCOUNT AND TRANSACTION POLICIES

Telephone orders  The funds accept telephone orders from all shareholders. To
guard against fraud, the funds require shareholders to use a PIN, and may record
telephone orders or take other reasonable precautions. However, if a fund does
take such steps to ensure the authenticity of an order, you may bear any loss if
the order later proves fraudulent.

Exchanges  You may exchange shares in these funds for shares in any other J.P.
Morgan Institutional or J.P. Morgan mutual fund at no charge (subject to the
securities laws of your state). When making exchanges, it is important to
observe any applicable minimums. Keep in mind that, for tax purposes, an
exchange is considered a sale.

A fund may alter, limit, or suspend its exchange policy at any time.

     Business days and NAV calculations The funds' regular business days are the
same as those of the New York Stock  Exchange.  The Service  Federal and Service
Tax Exempt Money Market  Funds  calculate  their net asset value per share (NAV)
every business day at 4:00 p.m.  eastern time The Service  Treasury Money Market
Fund calculates its NAV every business day at 4:30 p.m. eastern time The Service
Prime  Money  Market Fund  calculates  its NAV every  business  day at 5:00 p.m.
eastern time.

Timing of orders  Orders to buy or sell shares are executed at the next NAV
calculated after the order has been accepted. Purchase and redemption orders for
each fund must be received by the times indicated in the table below: 

Fund                                                       Cut-off Time 

Service Prime Money Market                                  5:00 p.m. 
Service Treasury Money Market                               4:30 p.m. 
Service Federal Money Market                                2:00 p.m. 
Service Tax Exempt Money Market                             12:00 noon 

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

                    Shareholder Services Agent
                    J.P. Morgan Funds Services
                    522 Fifth Avenue
                    New York, NY 10036
                    1-800-766-7722

                    Representatives are available 8:00 a.m. to 5:00 p.m. eastern
                    time on fund business days.


                                                            YOUR INVESTMENT | 13
<PAGE>
 
- --------------------------------------------------------------------------------
For the purchase to be effective and dividends to be earned on the same day,
immediately available funds must be received by 4:00 p.m. for Service Federal
and Service Tax Exempt Money Market Funds, by 4:30 p.m. for Service Treasury
Money Market Fund and by 5:00 p.m. for Service Prime Money Market Fund eastern
time on a fund business day. A fund has the right to suspend redemption of
shares and to postpone payment of proceeds for up to seven days or as permitted
by law.

Timing of settlements  When you buy shares, you will become the owner of record
when a fund receives your payment.

Redemption orders for each fund received by the respective cut-off times will be
paid in immediately available funds, normally on the same day, according to
instructions on file.

When you sell shares that you recently purchased by check, your order will be
executed at the next NAV but the proceeds will not be available until your check
clears. This may take up to 15 days.

Statements and reports  The funds send monthly account statements as well as
confirmations after each purchase or sale of shares (except reinvestments).
Every six months, each fund sends out an annual or semi-annual report containing
information on its holdings and a discussion of recent and anticipated market
conditions and fund performance.

Accounts with below-minimum balances  If your account balance falls below the
minimum for 30 days as a result of selling shares (and not because of
performance), the fund reserves the right to request that you buy more shares or
close your account. If your account balance is still below the minimum 60 days
after notification, the fund reserves the right to close out your account and
send the proceeds to the address of record.

DIVIDENDS AND DISTRIBUTIONS

Substantially all income dividends are declared daily and paid monthly. If all
of an investor's shares are redeemed during the month, accrued but unpaid
dividends are paid with the redemption proceeds. Shares of the funds earn
dividends on the business day their purchase is effective, but not on the
business day their redemption is effective.

Dividends and distributions are reinvested in additional fund shares.
Alternatively, you may instruct your financial professional or J.P. Morgan Funds
Services to have them sent to you by check, credited to a separate account, or
invested in another J.P. Morgan Institutional Fund.

TAX CONSIDERATIONS

In general, selling shares, exchanging shares, and receiving distributions
(whether reinvested or taken in cash) are all taxable events. The transactions
below typically create the following tax liabilities:

- --------------------------------------------------------------------------------
Transaction                                  Tax status
- --------------------------------------------------------------------------------
Income dividends from Prime                  Ordinary income
Money Market, Treasury Money
Market and Federal Money
Market Funds
- --------------------------------------------------------------------------------
Income dividends from Tax                    Exempt from federal
Exempt Money Market Fund                     income taxes
- --------------------------------------------------------------------------------
Short-term capital gains                     Ordinary income
distributions

Every January, each fund issues tax information on its distributions for the
previous year.

Any investor for whom a fund does not have a valid taxpayer identification
number will be subject to backup withholding for taxes.

The tax considerations described in this section do not apply to tax-deferred
accounts or other non-taxable entities.

Because each investor's tax circumstances are unique, please consult your tax
professional about your fund investment.


14 | YOUR INVESTMENT
<PAGE>
 
FUND DETAILS
- --------------------------------------------------------------------------------

MASTER/FEEDER STRUCTURE

As noted earlier, each fund is a "feeder" fund that invests in a master
portfolio. (Except where indicated, this prospectus uses the term "the fund" to
mean the feeder fund and its master portfolio taken together.)

Each master portfolio accepts investments from other feeder funds, and all the
feeders of a given master portfolio bear the portfolio's expenses in proportion
to their assets. However, each feeder can set its own transaction minimums,
fund-specific expenses, and other conditions. This means that one feeder could
offer access to the same master portfolio on more attractive terms, or could
experience better performance, than another feeder. Information about other
feeders is available by calling 1-800-766-7722. Generally, when a master
portfolio seeks a vote, its feeder fund will hold a shareholder meeting and cast
its vote proportionately, as instructed by its shareholders. Fund shareholders
are entitled to one full or fractional vote for each dollar or fraction of a
dollar invested.

Each feeder fund and its master portfolio expect to maintain consistent goals,
but if they do not, the fund will withdraw from the master portfolio, receiving
its assets either in cash or securities. Each fund's trustees would then
consider whether the fund should hire its own investment adviser, invest in a
different master portfolio, or take other action.

MANAGEMENT AND ADMINISTRATION

The feeder funds described in this prospectus and their corresponding master
portfolios are all governed by the same trustees. The trustees are responsible
for overseeing all business activities. The trustees are assisted by Pierpont
Group, Inc., which they own and operate on a cost basis; costs are shared by all
funds governed by these trustees. Funds Distributor Inc., as co-administrator,
along with J.P. Morgan, provides fund officers. J.P. Morgan, as
co-administrator, oversees each fund's other service providers.

J.P. Morgan receives the following fees for investment advisory and other
services:

Advisory services                    0.20% of the first $1 billion of each
                                     master portfolio's average net assets plus
                                     0.10% over $1 billion
- --------------------------------------------------------------------------------
Administrative services              Master portfolio's and fund's pro- 
(fee shared with Funds               rata portions of 0.09% of first $7 billion
the Distributor, Inc.)               in J.P. Morgan- advised portfolios, plus 
                                     0.04% over $7 billion
- --------------------------------------------------------------------------------
Shareholder services                 0.05% of the each fund's average net assets

The Advisor has voluntarily agreed to reimburse each fund so that total
operating expenses will not exceed the following respective percentages of
average net assets of the fund through the periods indicated below:

================================================================================
Fund                          Expense Cap            Expiration Date
- --------------------------------------------------------------------------------
Service Prime
Money Market                  0.45%                  3/31/99
- --------------------------------------------------------------------------------
Service Treasury             
Money Market                  0.35%                  12/1/97 - 7/31/98
                              0.40%                  8/1/98 - 11/30/98
                              0.45%                  12/1/98 - 2/28/99
- --------------------------------------------------------------------------------
Service Federal              
Money Market                  0.45%                  2/28/99
- --------------------------------------------------------------------------------
Service Tax Exempt           
Money Market                  0.60%                  12/31/98
                         
J.P. Morgan may pay fees to certain firms and professionals for providing
recordkeeping or other services in connection with investments in a fund.

Year 2000  Fund operations and shareholders could be adversely affected if the
computer systems used by J.P. Morgan, the funds' other service providers and
other entities with computer systems linked to the funds do not properly process
and calculate January 1, 2000 and after date-related information. J.P. Morgan is
working to avoid these problems and to obtain assurances from other service
providers that they are taking similar steps. However, it is not certain that
these actions will be sufficient to prevent these date-related problems from
adversely impacting fund operations and shareholders. In addition, to the extent
that operations of issuers of securities held by the funds are impaired by
date-related problems or prices of securities decline as a result of real or
perceived date-related problems of issuers held by the funds or generally, the
net asset value of the fund will decline.


                                                               FUND DETAILS | 15
<PAGE>
 
- --------------------------------------------------------------------------------

                     (THIS PAGE IS INTENTIONALLY LEFT BLANK)


16 |
<PAGE>
 
- --------------------------------------------------------------------------------

                     (THIS PAGE IS INTENTIONALLY LEFT BLANK)


                                                                            | 17
<PAGE>
 
FOR MORE INFORMATION
- --------------------------------------------------------------------------------

For investors who want more information on these funds, the following documents
are available free upon request:

Annual/Semi-annual Reports  Contain financial statements, performance data,
information on portfolio holdings, and a written analysis of market conditions
and fund performance for a fund's most recently completed fiscal year or
half-year.

Statement of Additional Information (SAI)  Provides a fuller technical and legal
description of a fund's policies, investment restrictions, and business
structure. This prospectus incorporates each fund's SAI by reference.

Copies of the current versions of these documents, along with other information
about the funds, may be obtained by contacting:

J.P. Morgan Institutional Funds
J.P. Morgan Funds Services
522 Fifth Avenue
New York, NY 10036

Telephone: 1-800-766-7722

Hearing impaired: 1-888-468-4015

Email: [email protected]

Text-only versions of these documents and this prospectus are available, upon
payment of a duplicating fee, from the Public Reference Room of the Securities
and Exchange Commission in Washington, D.C. (1-800-SEC-0330) and may be viewed
on-screen or downloaded from the SEC's Internet site at http://www.sec.gov. The
funds' investment company and 1933 Act registration numbers are:

J.P. Morgan Institutional Service Prime Money Market Fund ........ 811-07342 and
                                                                       033-54642
J.P. Morgan Institutional Service Treasury Money Market Fund ..... 811-07342 and
                                                                       033-54642
J.P. Morgan Institutional Service Federal Money Market Fund ...... 811-07342 and
                                                                       033-54642
J.P. Morgan Institutional Service Tax Exempt Money Market Fund ... 811-07342 and
                                                                       033-54642

J.P. MORGAN INSTITUTIONAL FUNDS AND THE MORGAN TRADITION

The J.P. Morgan Institutional Funds combine a heritage of integrity and
financial leadership with comprehensive, sophisticated analysis and management
techniques. Drawing on J.P. Morgan's extensive experience and depth as an
investment manager, the J.P. Morgan Institutional Funds offer a broad array of
distinctive opportunities for mutual fund investors.

JP Morgan
================================================================================
J.P. Morgan Institutional Funds

Advisor                                       Distributor

J.P. Morgan Investment Management Inc.        Funds Distributor, Inc.
522 Fifth Avenue                              60 State Street
New York, NY 10036                            Boston, MA 02109
1-800-766-7722                                1-800-221-7930

                                                                   PROSISMM-9810


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