AMERICAN CENTURY MUNICIPAL TRUST
497K3B, 1999-04-28
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[front cover]

AMERICAN CENTURY

Fund Profile

[american century logo(reg. sm)]
AMERICAN
CENTURY

Arizona Intermediate-Term Municipal Fund

This profile  summarizes key information  about the fund that is included in the
  fund's Prospectus. The fund's Prospectus includes additional information about
    the fund, including a more detailed description of the risks associated with
         investing in the fund, that you may want to consider before you invest.

[three photos of bubble blowing woman and child,
business men, woman at computer]

                                                                  APRIL 25, 1999
                                                                  INVESTOR CLASS

 You may obtain the Prospectus and other  information  about the fund at no cost
  by calling us at 1-800-345-2021, accessing our Web site or visiting one of our
   Investor Centers. See the back cover for additional telephone numbers and our
                                                                        address.


ARIZONA INTERMEDIATE-TERM MUNICIPAL FUND

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

    Arizona  Intermediate-Term  Municipal  seeks  safety of  principal  and high
    current income that is exempt from federal and Arizona income taxes.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

    The fund managers buy quality, intermediate-term debt securities with income
    payments exempt from federal and Arizona income taxes. Cities,  counties and
    other  municipalities  in Arizona usually issue these  securities for public
    projects, such as schools and roads.

    The fund managers also may buy quality,  intermediate-term  debt  securities
    whose payments are exempt from federal and Arizona income taxes, but not the
    federal alternative minimum tax. Cities,  counties and other  municipalities
    in Arizona usually issue these securities (called private activity bonds) to
    fund for-profit private projects, such as hospitals and athletic stadiums.

    The fund managers  also may use futures  contracts and options to pursue the
    fund's investment objective.

    During  unusual  market  conditions,   the  fund  is  permitted  to  keep  a
    significant amount of its assets in cash or cash-equivalents. If it does, it
    may not achieve its investment objective and may generate taxable income.

    The weighted average maturity of the fund is expected to be between five and
    10 years.

    Additional   information   about   Arizona   Intermediate-Term   Municipal's
    investments  is available  in its annual and  semiannual  reports.  In these
    reports you will find a discussion of the market  conditions  and investment
    strategies that  significantly  affected the fund's  performance  during the
    most recent fiscal  period.  You may get these reports at no cost by calling
    us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    * When  interest  rates  change,  the fund's  share value will be  affected.
    Generally,  when interest  rates rise,  the fund's share value will decline.
    The opposite is true when interest rates decline. The interest rate risk for
    Arizona  Intermediate-Term  Municipal  is higher  than for funds  which have
    shorter  weighted  average  maturities,  such as money market and short-term
    bond funds.

    * The fund may invest in  securities  rated in the  lowest  investment-grade
    category (e.g., Baa or BBB). The issuers of these securities are more likely
    to have problems making interest and principal payments.

    * Some or all of the fund's income may be subject to the federal alternative
    minimum tax.

    * Because the fund invests  primarily in Arizona  municipal  securities,  it
    will  be  sensitive  to  events  that  affect  Arizona's  economy.   Arizona
    Intermediate-Term  Municipal may have a higher level of risk than funds that
    invest in a larger universe of securities.

    * As with all funds,  at any given time the value of your  shares of Arizona
    Intermediate-Term  Municipal  may be worth  more or less  than the price you
    paid.  If you sell  your  shares  when the  value is less than the price you
    paid, you will lose money.

    * An investment in the fund is not a bank deposit,  and it is not insured or
    guaranteed by the Federal Deposit Insurance  Corporation (FDIC) or any other
    government agency.

    In summary,  Arizona  Intermediate-Term  Municipal is intended for investors
    who seek safety of  principal  and high  current  income that is exempt from
    federal and Arizona  income taxes through a municipal  securities  fund, and
    who are willing to accept the risks  associated  with the fund's  investment
    strategy.


Arizona Intermediate-Term Municipal           American Century Investments


    FUND PERFORMANCE

    The   following   bar  chart  shows  the  actual   performance   of  Arizona
    Intermediate-Term Municipal's shares for each calendar year since the fund's
    inception on April 11, 1994.  The bar chart  indicates the volatility of the
    fund's  historical  returns  from  year  to  year.  The  bar  chart  and the
    performance information below are not intended to indicate how the fund will
    perform in the future.

[bar chart]
    Calendar Year-By-Year Returns (1)
         1998         5.90%
         1997         6.90%
         1996         3.74%
         1995        13.15%

    (1) As of March  31,  1999,  the end of the most  recent  calendar  quarter,
        Arizona Intermediate-Term Municipal's year-to-date return was 0.60%.

    The highest and lowest quarterly returns for the period reflected in the bar
    chart are:

                              Highest                 Lowest
    ---------------------------------------------------------------------------
    Arizona Intermediate-
    Term Municipal            4.6% (1Q 1995)          -0.53% (1Q 1996)

    The following  table shows the average  annual  returns of the fund's shares
    for the periods  indicated.  The Lehman 5-Year General  Obligation Index, an
    unmanaged index that reflects no operating costs, is included as a benchmark
    for performance comparisons. For current performance information,  including
    yields, please call us or access our Web site.

                                             1 YEAR             LIFE OF FUND(1)
    ---------------------------------------------------------------------------
     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED MARCH 31, 1999)
    ---------------------------------------------------------------------------
     Arizona Intermediate-Term Municipal     5.79%              6.44%
     Lehman 5-Year General Obligation Index  5.69%              6.14%(2)

        (1) The inception date of Arizona  Intermediate-Term  Municipal is April
        11, 1994.

        (2) Benchmark from April 30, 1994.

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

    There are no sales loads, fees or other charges

    * to buy fund shares directly from American Century

    * to reinvest dividends in additional shares

    * to exchange into the Investor Class shares of other American Century fund

    * to redeem your shares

    The following table describes the fees and expenses that you will pay if you
    buy and hold shares of the fund.

    ---------------------------------------------------------------------------
     ANNUAL FUND OPERATING EXPENSES
     (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
    ---------------------------------------------------------------------------
       Management Fee                              0.51%(1)
       Distribution and Service (12b-1) Fees       None
       Other Expenses(2)                           0.01%
       Total Annual Fund Operating Expenses        0.52%


       (1) Based on expenses incurred during the fund's most recent fiscal year.
           The  fund  has a  stepped  fee  schedule.  As a  result,  the  fund's
           management fee rate generally decreases as fund assets increase.

       (2) Other   expenses   include  the  fees  and  expenses  of  the  fund's
           independent trustees, their legal counsel, interest and extraordinary
           expenses.

           EXAMPLE

             Assuming you . . .
             * invest $10,000 in the fund
             * redeem all of your shares at the end of the periods shown below
             * earn a 5% return each year
             * incur the same operating expenses as shown above
             . . . your cost of investing in the fund would be:

           1 year            3 years          5 years            10 years
    ---------------------------------------------------------------------------
          $53                $167             $290               $652

             Of course, actual costs may be higher or lower. Use this example to
             compare the costs of investing in other funds.


Fund Profile                                 Arizona Intermediate-Term Municipal


5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGERS?

    American Century Investment  Management,  Inc. provides  investment advisory
    and  management  services  for the  fund.  American  Century  uses  teams of
    portfolio  managers,  assistant  portfolio  managers  and  analysts  working
    together to manage its mutual  funds.  The  portfolio  manager who leads the
    team that  manages  Arizona  Intermediate-Term  Municipal is  identified  as
    follows:

    KENNETH  SALINGER,  Portfolio  Manager,  has  been a member  of the  Arizona
    Intermediate-Term Municipal team since July 1998. He joined American Century
    in April 1992. He has a bachelor's degree in quantitative economics from the
    University of California-San Diego.

6. HOW DO I BUY FUND SHARES?

    *  Complete and return the enclosed application

    *  Call us and exchange shares from another American Century fund

    *  Call us and send your investment by bank wire transfer

    Your initial investment must be at least $5,000. If your redemption activity
    causes the value of your  account to fall below this account  minimum,  your
    shares may be redeemed involuntarily.

7. HOW DO I SELL FUND SHARES?

    You may sell all or part of your fund shares on any  business day by writing
    or   calling   us.   You  also  may   exchange   your   shares  in   Arizona
    Intermediate-Term  Municipal  for  shares in nearly  70 other  mutual  funds
    offered by American  Century.  Depending  on the options you select when you
    open your account,  some  restrictions may apply. For your protection,  some
    redemption requests require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

    Arizona Intermediate-Term  Municipal pays distributions of substantially all
    of its income monthly.  Distributions  will generally be exempt from federal
    and Arizona income taxes. Some or all of the fund's income may, however,  be
    subject to the federal alternative minimum tax. Consult your tax advisor for
    information about whether you are subject to the federal alternative minimum
    tax. Distributions are reinvested  automatically in additional shares unless
    you choose another option.

9. WHAT SERVICES ARE AVAILABLE?

    American Century offers several ways to make it easier  for you to manage
    your account, such as

     * telephone transactions 
     * wire and electronic funds transfers 
     * 24-hour Automated Information Line transactions
     * 24-hour online Internet account access and transactions

    You will find more information  about these choices in our Investor Services
    Guide,  which you may  request  by  calling  us,  accessing  our Web site or
    visiting one of our Investor Centers.

    Information   contained  in  our  Investor   Services   Guide   pertains  to
    shareholders  who invest directly with American  Century rather than through
    an employer-sponsored retirement plan or financial intermediary.

    If  you  own  or  are   considering   purchasing   fund  shares  through  an
    employer-sponsored  retirement plan or financial intermediary,  your ability
    to purchase  shares of the fund,  exchange them for shares of other American
    Century  funds,  and  redeem  them will  depend on the terms of your plan or
    financial  intermediary.  If  you  have  questions  about  investing  in  an
    employer-sponsored retirement plan or through a financial intermediary, call
    a Service Representative at 1-800-345-3533.

- --------------------------------------------------------------------------------
[american century logo(reg. sm)]
AMERICAN
CENTURY

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

INVESTOR RELATIONS
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX
816-340-7962

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

BUSINESS, NOT-FOR-PROFIT AND
EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-353

Visit our Web site at WWW.AMERICANCENTURY.COM  [link to web site with arrow]

SH-PRF-16141   9904                                   Funds Distributor, Inc.
<PAGE>
[front cover]

AMERICAN CENTURY

Fund Profile

[american century logo(reg. sm)]
AMERICAN
CENTURY

Florida Intermediate-Term Municipal Fund

This profile  summarizes key information  about the fund that is included in the
  fund's Prospectus. The fund's Prospectus includes additional information about
   the fund, including a more detailed  description of the risks associated with
         investing in the fund, that you may want to consider before you invest.

[three photos of bubble blowing woman and child,
business men, woman at computer]

                                                                  APRIL 25, 1999
                                                                  INVESTOR CLASS

 You may obtain the Prospectus and other  information  about the fund at no cost
  by calling us at 1-800-345-2021, accessing our Web site or visiting one of our
   Investor Centers. See the back cover for additional telephone numbers and our
                                                                        address.


FLORIDA INTERMEDIATE-TERM MUNICIPAL FUND

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

    Florida  Intermediate-Term  Municipal  seeks  safety of  principal  and high
    current income that is exempt from federal income tax and seeks to be exempt
    from the Florida intangible personal property tax.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

    The fund managers buy quality, intermediate-term debt securities with income
    payments exempt from federal income tax and the Florida intangible  personal
    property tax. Cities,  counties and other  municipalities in Florida usually
    issue these securities for public projects, such as schools and roads.

    The fund managers also may buy quality,  intermediate-term  debt  securities
    whose payments are exempt from federal income tax and the Florida intangible
    personal property tax, but not the federal  alternative minimum tax. Cities,
    counties and other  municipalities in Florida usually issue these securities
    (called private activity bonds) to fund for-profit private projects, such as
    hospitals and athletic stadiums.

    The fund managers  also may use futures  contracts and options to pursue the
    fund's investment objective.

    During  unusual  market  conditions,   the  fund  is  permitted  to  keep  a
    significant amount of its assets in cash or cash-equivalents. If it does, it
    may not achieve its investment objective and may generate taxable income.

    The weighted average maturity of the fund is expected to be between five and
    10 years.

    Additional   information   about   Florida   Intermediate-Term   Municipal's
    investments  is available  in its annual and  semiannual  reports.  In these
    reports you will find a discussion of the market  conditions  and investment
    strategies that  significantly  affected the fund's  performance  during the
    most recent fiscal  period.  You may get these reports at no cost by calling
    us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    * When  interest  rates  change,  the fund's  share value will be  affected.
    Generally,  when interest  rates rise,  the fund's share value will decline.
    The opposite is true when interest rates decline. The interest rate risk for
    Florida  Intermediate-Term  Municipal  is higher  than for  funds  that have
    shorter  weighted  average  maturities,  such as money market and short-term
    bond funds.

    * The fund may invest in  securities  rated in the  lowest  investment-grade
    category (e.g., Baa or BBB). The issuers of these securities are more likely
    to have problems making interest and principal payments.

    * Some or all of the fund's income may be subject to the federal alternative
    minimum tax.

    * Because the fund invests  primarily in Florida  municipal  securities,  it
    will  be  sensitive  to  events  that  affect  Florida's  economy.   Florida
    Intermediate-Term  Municipal may have a higher level of risk than funds that
    invest in a larger universe of securities.

    * As with all funds,  at any given time the value of your  shares of Florida
    Intermediate-Term  Municipal  may be worth  more or less  than the price you
    paid.  If you sell  your  shares  when the  value is less than the price you
    paid, you will lose money.

    * An investment in the fund is not a bank deposit,  and it is not insured or
    guaranteed by the Federal Deposit Insurance  Corporation (FDIC) or any other
    government agency.

    In summary,  Florida  Intermediate-Term  Municipal is intended for investors
    who seek safety of  principal  and high  current  income that is exempt from
    federal income tax and the Florida intangible  personal property tax through
    a  municipal  securities  fund,  and who are  willing  to  accept  the risks
    associated with the fund's investment strategy.


Florida Intermediate-Term Municipal           American Century Investments


    FUND PERFORMANCE

    The   following   bar  chart  shows  the  actual   performance   of  Florida
    Intermediate-Term Municipal's shares for each calendar year since the fund's
    inception on April 11, 1994.  The bar chart  indicates the volatility of the
    fund's  historical  returns  from  year  to  year.  The  bar  chart  and the
    performance information below are not intended to indicate how the fund will
    perform in the future.

[bar chart]
    Calendar Year-By-Year Returns (1)
         1998         6.49%
         1997         8.22%
         1996         3.66%
         1995        13.49%

    (1) As of March  31,  1999,  the end of the most  recent  calendar  quarter,
        Florida Intermediate-Term Municipal's year-to-date return was 0.63%.

    The highest and lowest quarterly returns for the period reflected in the bar
    chart are:

                              Highest                 Lowest
    ---------------------------------------------------------------------------
    Florida Intermediate-
    Term Municipal            5.06% (1Q 1995)         -0.51% (1Q 1996)

    The following  table shows the average  annual  returns of the fund's shares
    for the periods  indicated.  The Lehman 5-Year General  Obligation Index, an
    unmanaged index that reflects no operating costs, is included as a benchmark
    for performance comparisons. For current performance information,  including
    yields, please call us or access our Web site.

                                                1 YEAR         LIFE OF FUND(1)
    ---------------------------------------------------------------------------
     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED MARCH 31, 1999)
    ---------------------------------------------------------------------------
     Florida Intermediate-Term Municipal        6.04%          6.70%
     Lehman 5-Year General Obligation Index     5.69%          6.14%(2)

        (1) The inception date of Florida  Intermediate-Term  Municipal is April
            11, 1994.

        (2) Benchmark from April 30, 1994.

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

    There are no sales loads, fees or other charges

    * to buy fund shares directly from American Century

    * to reinvest dividends in additional shares

    * to exchange into the Investor Class shares of other American Century fund

    * to redeem your shares

    The following table describes the fees and expenses that you will pay if you
    buy and hold shares of the fund.

    ---------------------------------------------------------------------------
     ANNUAL FUND OPERATING EXPENSES
     (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
    ---------------------------------------------------------------------------
      Management Fee                                  0.51%(1)
      Distribution and Service (12b-1) Fees           None
      Other Expenses(2)                               0.01%
      Total Annual Fund Operating Expenses            0.52%

      (1) Based on expenses  incurred during the fund's most recent fiscal year.
          The  fund  has  a  stepped  fee  schedule.  As a  result,  the  fund's
          management fee rate generally decreases as fund assets increase.

      (2) Other expenses include the fees and expenses of the fund's independent
          trustees, their legal counsel, interest and extraordinary expenses.

           EXAMPLE

             Assuming you . . .
             * invest $10,000 in the fund
             * redeem all of your shares at the end of the periods shown below
             * earn a 5% return each year
             * incur the same operating expenses as shown above
             . . . your cost of investing in the fund would be:

       1 year            3 years           5 years            10 years
    ---------------------------------------------------------------------------
       $53               $167              $290               $652

             Of course, actual costs may be higher or lower. Use this example to
             compare the costs of investing in other funds.


Fund Profile                                Florida Intermediate-Term Municipal


5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGERS?

    American Century Investment  Management,  Inc. provides  investment advisory
    and  management  services  for the  fund.  American  Century  uses  teams of
    portfolio  managers,  assistant  portfolio  managers  and  analysts  working
    together to manage its mutual  funds.  The  portfolio  manager who leads the
    team that  manages  Florida  Intermediate-Term  Municipal is  identified  as
    follows:

    KENNETH  SALINGER,  Portfolio  Manager,  has  been a member  of the  Florida
    Intermediate-Term  Municipal  team since October  1996.  He joined  American
    Century in April 1992. He has a bachelor's degree in quantitative  economics
    from the University of California-San Diego.

6. HOW DO I BUY FUND SHARES?

    *  Complete and return the enclosed application

    *  Call us and exchange shares from another American Century fund

    *  Call us and send your investment by bank wire transfer

    Your initial investment must be at least $5,000. If your redemption activity
    causes the value of your  account to fall below this account  minimum,  your
    shares may be redeemed involuntarily.

7. HOW DO I SELL FUND SHARES?

    You may sell all or part of your fund shares on any  business day by writing
    or   calling   us.   You  also  may   exchange   your   shares  in   Florida
    Intermediate-Term  Municipal  for  shares in nearly  70 other  mutual  funds
    offered by American  Century.  Depending  on the options you select when you
    open your account,  some  restrictions may apply. For your protection,  some
    redemption requests require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

    Florida Intermediate-Term  Municipal pays distributions of substantially all
    of its income  monthly.  Distributions  will  generally  be exempt  from the
    Florida  intangible  personal  property tax and regular  federal income tax.
    Some or all of the fund's  income  may,  however,  be subject to the federal
    alternative  minimum  tax.  Consult your tax advisor for  information  about
    whether   you  are  subject  to  the  federal   alternative   minimum   tax.
    Distributions  are reinvested  automatically in additional shares unless you
    choose another option.

9. WHAT SERVICES ARE AVAILABLE?

    American Century offers several ways to make it easier  for you to manage
    your account, such as

     * telephone transactions 
     * wire and electronic funds transfers 
     * 24-hour Automated Information Line transactions
     * 24-hour online Internet account access and transactions

    You will find more information  about these choices in our Investor Services
    Guide,  which you may  request  by  calling  us,  accessing  our Web site or
    visiting one of our Investor Centers.

    Information   contained  in  our  Investor   Services   Guide   pertains  to
    shareholders  who invest directly with American  Century rather than through
    an employer-sponsored retirement plan or financial intermediary.

    If  you  own  or  are   considering   purchasing   fund  shares  through  an
    employer-sponsored  retirement plan or financial intermediary,  your ability
    to purchase  shares of the fund,  exchange them for shares of other American
    Century  funds,  and  redeem  them will  depend on the terms of your plan or
    financial  intermediary.  If  you  have  questions  about  investing  in  an
    employer-sponsored retirement plan or through a financial intermediary, call
    a Service Representative at 1-800-345-3533.

- --------------------------------------------------------------------------------
[american century logo(reg. sm)]
AMERICAN
CENTURY

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

INVESTOR RELATIONS
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX
816-340-7962

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

BUSINESS, NOT-FOR-PROFIT AND
EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-353

Visit our Web site at WWW.AMERICANCENTURY.COM  [link to web site with arrow]

SH-PRF-16142   9904                                   Funds Distributor, Inc.
<PAGE>
[front cover]

AMERICAN CENTURY

Fund Profile

[american century logo(reg. sm)]
AMERICAN
CENTURY

Intermediate-Term Tax-Free Fund

This profile  summarizes key information  about the fund that is included in the
  fund's Prospectus. The fund's Prospectus includes additional information about
   the fund, including a more detailed  description of the risks associated with
         investing in the fund, that you may want to consider before you invest.

[three photos of bubble blowing woman and child,
business men, woman at computer]

                                                                  APRIL 25, 1999
                                                                  INVESTOR CLASS

 You may obtain the Prospectus and other  information  about the fund at no cost
  by calling us at 1-800-345-2021, accessing our Web site or visiting one of our
   Investor Centers. See the back cover for additional telephone numbers and our
                                                                        address.


INTERMEDIATE-TERM TAX-FREE FUND

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

    Intermediate-Term Tax-Free seeks safety of principal and high current income
    that is exempt from federal income tax.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

    The fund managers buy quality, intermediate-term debt securities with income
    payments  exempt  from  federal  income  tax.  Cities,  counties  and  other
    municipalities  in the 50 states and U.S.  territories  usually  issue these
    securities for public projects, such as schools and roads.

    The  fund  managers  also  may  buy  some  quality,  intermediate-term  debt
    securities  whose  payments are exempt from regular  federal income tax, but
    not  the  federal  alternative  minimum  tax.  Cities,  counties  and  other
    municipalities  usually  issue these  securities  (called  private  activity
    bonds) to fund for-profit  private projects,  such as hospitals and athletic
    stadiums.  No more than 20% of the fund's  total  assets may be  invested in
    these securities.

    The weighted average maturity of the fund is expected to be between five and
    10 years.

    Additional  information about  Intermediate-Term  Tax-Free's  investments is
    available in its annual and  semiannual  reports.  In these reports you will
    find a discussion of the market  conditions and investment  strategies  that
    significantly  affected the fund's performance during the most recent fiscal
    period. You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    * When  interest  rates  change,  the fund's  share value will be  affected.
    Generally,  when interest  rates rise,  the fund's share value will decline.
    The opposite is true when interest rates decline. This interest rate risk is
    higher  for  Intermediate-Term  Tax-Free  than for funds  that have  shorter
    weighted average maturities, such as money market and short-term bond funds.

    * The fund may invest in  securities  rated in the  lowest  investment-grade
    category (e.g., Baa or BBB). The issuers of these securities are more likely
    to have problems making interest and principal payments.

    * Some of the  fund's  income  may be  subject  to the  federal  alternative
    minimum tax.

    * Because the fund invests  primarily in  municipal  securities,  it will be
    sensitive  to  events  that  affect  municipal  markets.   Intermediate-Term
    Tax-Free  may have a higher level of risk than funds that invest in a larger
    universe of securities.

    * As with  all  funds,  at any  given  time  the  value  of your  shares  of
    Intermediate-Term  Tax-Free  may be worth  more or less  than the  price you
    paid.  If you sell  your  shares  when the  value is less than the price you
    paid, you will lose money.

    * An investment in the fund is not a bank deposit,  and it is not insured or
    guaranteed by the Federal Deposit Insurance  Corporation (FDIC) or any other
    government agency.

    In summary,  Intermediate-Term  Tax-Free is intended for  investors who seek
    safety of  principal  and high  current  income that is exempt from  federal
    income tax through a municipal securities fund and who are willing to accept
    the risks associated with the fund's investment strategy.

    FUND PERFORMANCE

    The following bar chart shows the actual  performance  of  Intermediate-Term
    Tax-Free's  shares  for each of the last 10  calendar  years.  The bar chart
    indicates the volatility of the fund's historical returns from year to year.
    The bar chart and the  performance  information  below are not  intended  to
    indicate how the fund will perform in the future.

[bar chart]
    Calendar Year-By-Year Returns (1)
         1998         5.81%
         1997         7.44%
         1996         3.94%
         1995        11.93%
         1994        -2.06%
         1993         9.07%
         1992         7.17%
         1991        10.05%
         1990         6.28%
         1989         6.66%

         (1) As of March 31, 1999, the end of the most recent calendar  quarter,
             Intermediate-Term Tax-Free's year-to-date return was 0.54%.


Intermediate-Term Tax-Free                    American Century Investments


    The highest and lowest quarterly returns for the period reflected in the bar
    chart are:

                                  Highest               Lowest
    ---------------------------------------------------------------------------
    Intermediate-Term Tax-Free    4.17% (1Q 1995)       -3.54% (1Q 1994)

    The following table shows the average annual return of the fund's shares for
    the periods  indicated.  The Lehman 5-Year General Obligation (GO) Index, an
    unmanaged index that reflects no operating costs, is included as a benchmark
    for performance comparisons. For current performance information,  including
    yields, please call us or access our Web site.

                           1 YEAR     5 YEARS    10 YEARS      LIFE OF FUND(1)
    ---------------------------------------------------------------------------
     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED MARCH 31, 1999)
    ---------------------------------------------------------------------------
     Intermediate-Term
       Tax-Free            5.58%      6.19%      6.63%         6.00%
     Lehman 5-Year
       GO Index            5.69%      6.25%      7.12%         5.93%(2)

        (1) The inception date for Intermediate-Term Tax-Free is March 2, 1987.

        (2) Benchmark from February 28, 1987.

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

    There are no sales loads, fees or other charges

    * to buy fund shares directly from American Century

    * to reinvest dividends in additional shares

    * to exchange into the Investor Class shares of other American Century fund

    * to redeem your shares

    The following table describes the fees and expenses that you will pay if you
    buy and hold shares of the fund.

    ---------------------------------------------------------------------------
     ANNUAL FUND OPERATING EXPENSES
     (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
    ---------------------------------------------------------------------------
         Management Fee                                0.51%(1)
         Distribution and Service (12b-1) Fees         None
         Other Expenses(2)                             0.00%
         Total Annual Fund Operating Expenses          0.51%


        (1) Based on expenses  incurred  during the fund's  most  recent  fiscal
            year. The fund has a stepped fee schedule.  As a result,  the fund's
            management fee rate generally decreases as fund assets increase.

        (2) Other  expenses,  which  include the fees and expenses of the fund's
            independent   trustees,   their   legal   counsel,    interest   and
            extraordinary  expenses,  were less than  0.005% for the most recent
            fiscal year.

           EXAMPLE

             Assuming you . . .
             * invest $10,000 in the fund
             * redeem all of your shares at the end of the periods shown below
             * earn a 5% return each year
             * incur the same operating expenses as shown above
             . . . your cost of investing in the fund would be:

         1 year           3 years            5 years              10 years
    ---------------------------------------------------------------------------
         $52              $163               $285                 $640

             Of course, actual costs may be higher or lower. Use this example to
             compare the costs of investing in other funds.

5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGERS?

    American Century Investment  Management,  Inc. provides  investment advisory
    and  management  services  for the  fund.  American  Century  uses  teams of
    portfolio  managers,  assistant  portfolio  managers  and  analysts  working
    together to manage its mutual  funds.  The  portfolio  manager who leads the
    team that manages Intermediate-Term Tax-Free is identified as follows:

    JOEL SILVA, Vice President and Portfolio  Manager,  has been a member of the
    Intermediate-Term  Tax-Free team since June 1994. He joined American Century
    in August  1989.  He has a  bachelor's  degree in  finance  from  California
    Polytechnic University and an MBA in corporate finance from California State
    University - Hayward.

6. HOW DO I BUY FUND SHARES?

    *  Complete and return the enclosed application

    *  Call us and exchange shares from another American Century fund

    *  Call us and send your investment by bank wire transfer

    Your initial investment must be at least $5,000. If your redemption activity
    causes the value of your  account to fall below this account  minimum,  your
    shares may be redeemed involuntarily.


Fund Profile                                     Intermediate-Term Tax-Free


7. HOW DO I SELL FUND SHARES?

    You may sell all or part of your fund shares on any  business day by writing
    or  calling  us.  You also may  exchange  your  shares in  Intermediate-Term
    Tax-Free  for shares in nearly 70 other  mutual  funds  offered by  American
    Century.  Depending  on the options  you select when you open your  account,
    some restrictions may apply. For your protection,  some redemption  requests
    require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

    Intermediate-Term  Tax-Free pays  distributions of substantially  all of its
    income monthly.  Distributions  will generally be exempt from federal income
    tax.  Some of the fund's  income  may,  however,  be subject to the  federal
    alternative  minimum  tax.  Consult your tax advisor for  information  about
    whether   you  are  subject  to  the  federal   alternative   minimum   tax.
    Distributions  are reinvested  automatically in additional shares unless you
    choose another option.

9. WHAT SERVICES ARE AVAILABLE?

    American Century offers several ways to make it easier  for you to manage
    your account, such as

     * telephone transactions 
     * wire and electronic funds transfers 
     * 24-hour Automated Information Line transactions
     * 24-hour online Internet account access and transactions

    You will find more information  about these choices in our Investor Services
    Guide,  which you may  request  by  calling  us,  accessing  our Web site or
    visiting one of our Investor Centers.

    Information   contained  in  our  Investor   Services   Guide   pertains  to
    shareholders  who invest directly with American  Century rather than through
    an employer-sponsored retirement plan or financial intermediary.

    If  you  own  or  are   considering   purchasing   fund  shares  through  an
    employer-sponsored  retirement plan or financial intermediary,  your ability
    to purchase  shares of the fund,  exchange them for shares of other American
    Century  funds,  and  redeem  them will  depend on the terms of your plan or
    financial  intermediary.  If  you  have  questions  about  investing  in  an
    employer-sponsored retirement plan or through a financial intermediary, call
    a Service Representative at 1-800-345-3533.

- --------------------------------------------------------------------------------
[american century logo(reg. sm)]
AMERICAN
CENTURY

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

INVESTOR RELATIONS
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX
816-340-7962

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

BUSINESS, NOT-FOR-PROFIT AND
EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-353

Visit our Web site at WWW.AMERICANCENTURY.COM  [link to web site with arrow]

SH-PRF-16136   9904                                   Funds Distributor, Inc.
<PAGE>
[front cover]

AMERICAN CENTURY

Fund Profile

[american century logo(reg. sm)]
AMERICAN
CENTURY

Long-Term Tax-Free Fund

This profile  summarizes key information  about the fund that is included in the
  fund's Prospectus. The fund's Prospectus includes additional information about
   the fund, including a more detailed  description of the risks associated with
         investing in the fund, that you may want to consider before you invest.

[three photos of bubble blowing woman and child,
business men, woman at computer]

                                                                  APRIL 25, 1999
                                                                  INVESTOR CLASS

 You may obtain the Prospectus and other  information  about the fund at no cost
  by calling us at 1-800-345-2021, accessing our Web site or visiting one of our
   Investor Centers. See the back cover for additional telephone numbers and our
                                                                        address.


LONG-TERM TAX-FREE FUND

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

    Long-Term Tax-Free seeks safety of principal and high current income that is
    exempt from federal income tax.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

    The fund  managers  buy  quality,  long-term  debt  securities  with  income
    payments  exempt  from  federal  income  tax.  Cities,  counties  and  other
    municipalities  in the 50 states and U.S.  territories  usually  issue these
    securities for public projects, such as schools and roads.

    The fund managers also may buy some quality, long-term debt securities whose
    payments  are exempt from  regular  federal  income tax, but not the federal
    alternative minimum tax. Cities,  counties and other municipalities  usually
    issue these  securities  (called private  activity bonds) to fund for-profit
    private projects,  such as hospitals and athletic stadiums. No more than 20%
    of the fund's total assets may be invested in these securities.

    The  weighted  average  maturity  of the fund is  expected to be 10 years or
    longer.

    Additional  information about Long-Term Tax-Free's  investments is available
    in its annual  and  semiannual  reports.  In these  reports  you will find a
    discussion  of  the  market   conditions  and  investment   strategies  that
    significantly  affected the fund's performance during the most recent fiscal
    period. You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    * When  interest  rates  change,  the fund's  share value will be  affected.
    Generally,  when interest  rates rise,  the fund's share value will decline.
    The opposite is true when interest rates decline. This interest rate risk is
    higher for  Long-Term  Tax-Free  than for funds that have  shorter  weighted
    average maturities,  such as money market,  short-term and intermediate-term
    bond funds.

    * The fund may invest in  securities  rated in the  lowest  investment-grade
    category (e.g., Baa or BBB). The issuers of these securities are more likely
    to have problems making interest and principal payments.

    * Some of the  fund's  income  may be  subject  to the  federal  alternative
    minimum tax.

    * Because the fund invests  primarily in  municipal  securities,  it will be
    sensitive to events that affect municipal  markets.  Long-Term  Tax-Free may
    have a higher  level of risk than funds that invest in a larger  universe of
    securities.

    * As with all funds, at any given time the value of your shares of Long-Term
    Tax-Free may be worth more or less than the price you paid. If you sell your
    shares when the value is less than the price you paid, you will lose money.

    * An investment in the fund is not a bank deposit,  and it is not insured or
    guaranteed by the Federal Deposit Insurance  Corporation (FDIC) or any other
    government agency.

    In summary,  Long-Term Tax-Free is intended for investors who seek safety of
    principal  and high current  income that is exempt from  federal  income tax
    through a municipal  securities fund and who are willing to accept the risks
    associated with the fund's investment strategy.

    FUND PERFORMANCE

    The following bar chart shows the actual performance of Long-Term Tax-Free's
    shares for each of the last 10 calendar  years.  The bar chart indicates the
    volatility of the fund's historical returns from year to year. The bar chart
    and the performance  information  below are not intended to indicate how the
    fund will perform in the future.

[bar chart]
    Calendar Year-By-Year Returns (1)
         1998         5.94%
         1997         9.59%
         1996         3.08%
         1995        18.50%
         1994        -5.58%
         1993        12.15%
         1992         7.61%
         1991        12.01%
         1990         6.15%
         1989         9.55%

        (1) As of March 31, 1999, the end of the most recent  calendar  quarter,
            Long-Term Tax-Free's year-to-date return was 0.35%.


Long-Term Tax-Free                            American Century Investments


    The highest and lowest quarterly returns for the period reflected in the bar
    chart are:

                               Highest                 Lowest
    ---------------------------------------------------------------------------
    Long-Term Tax-Free         6.68% (1Q 1995)         -5.46% (1Q 1994)

    The following table shows the average annual return of the fund's shares for
    the  periods  indicated.  The Lehman  Long-Term  Municipal  Bond  Index,  an
    unmanaged index that reflects no operating costs, is included as a benchmark
    for performance comparisons. For current performance information,  including
    yields, please call us or access our Web site.

                            1 YEAR     5 YEARS     10 YEARS    LIFE OF FUND(1)
    ---------------------------------------------------------------------------
     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED MARCH 31, 1999)
    ---------------------------------------------------------------------------
     Long-Term Tax Free     5.61%      7.28%       7.72%       7.12%
     Lehman Long-Term
       Municipal Bond
       Index                6.56%      8.82%       9.13%       8.68%(2)

        (1) The inception date for Long-Term Tax-Free is March 2, 1987.

        (2) Benchmark from February 28, 1987.

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

    There are no sales loads, fees or other charges

    * to buy fund shares directly from American Century

    * to reinvest dividends in additional shares

    * to exchange into the Investor Class shares of other American Century fund

    * to redeem your shares

    The following table describes the fees and expenses that you will pay if you
    buy and hold shares of the fund.

    ---------------------------------------------------------------------------
     ANNUAL FUND OPERATING EXPENSES
     (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
    ---------------------------------------------------------------------------
       Management Fee                             0.51%(1)
       Distribution and Service (12b-1) Fees      None
       Other Expenses(2)                          0.00%
       Total Annual Fund Operating Expenses       0.51%

      (1) Based on expenses  incurred during the fund's most recent fiscal year.
          The  fund  has  a  stepped  fee  schedule.  As a  result,  the  fund's
          management fee rate generally decreases as fund assets increase.

      (2) Other  expenses,  which  include  the fees and  expenses of the fund's
          independent trustees, their legal counsel,  interest and extraordinary
          expenses, were less than 0.005% for the most recent fiscal year.

           EXAMPLE

             Assuming you . . .
             * invest $10,000 in the fund
             * redeem all of your shares at the end of the periods shown below
             * earn a 5% return each year
             * incur the same operating expenses as shown above
             . . . your cost of investing in the fund would be:

          1 year          3 years          5 years            10 years
    ---------------------------------------------------------------------------
          $52             $163             $285               $640

             Of course, actual costs may be higher or lower. Use this example to
             compare the costs of investing in other funds.

5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGERS?

    American Century Investment  Management,  Inc. provides  investment advisory
    and  management  services  for the  fund.  American  Century  uses  teams of
    portfolio  managers,  assistant  portfolio  managers  and  analysts  working
    together to manage its mutual  funds.  The  portfolio  manager who leads the
    team that manages Long-Term Tax-Free is identified as follows:

    G. DAVID MACEWEN,  Senior Vice President and Portfolio  Manager,  supervises
    the  American  Century  Municipal  Trust  team and has been a member  of the
    Long-Term  Tax-Free team since May 1991. He joined  American  Century in May
    1991  as a  Municipal  Portfolio  Manager.  He has a  bachelor's  degree  in
    economics  from Boston  University and an MBA in finance from the University
    of Delaware.

6. HOW DO I BUY FUND SHARES?

    *  Complete and return the enclosed application

    *  Call us and exchange shares from another American Century fund

    *  Call us and send your investment by bank wire transfer

    Your initial investment must be at least $5,000. If your redemption activity
    causes the value of your  account to fall below this account  minimum,  your
    shares may be redeemed involuntarily.


Fund Profile                                             Long-Term Tax-Free


7. HOW DO I SELL FUND SHARES?

    You may sell all or part of your fund shares on any  business day by writing
    or calling us. You also may exchange  your shares in Long-Term  Tax-Free for
    shares  in  nearly  70 other  mutual  funds  offered  by  American  Century.
    Depending  on the  options  you  select  when you open  your  account,  some
    restrictions  may  apply.  For your  protection,  some  redemption  requests
    require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

    Long-Term  Tax-Free pays  distributions of  substantially  all of its income
    monthly.  Distributions  will  generally be exempt from federal  income tax.
    Some  of  the  fund's  income  may,  however,  be  subject  to  the  federal
    alternative  minimum  tax.  Consult your tax advisor for  information  about
    whether   you  are  subject  to  the  federal   alternative   minimum   tax.
    Distributions  will  automatically be reinvested in additional shares unless
    you choose another option.

9. WHAT SERVICES ARE AVAILABLE?

    American Century offers several ways to make it easier  for you to manage
    your account, such as

     * telephone transactions 
     * wire and electronic funds transfers 
     * 24-hour Automated Information Line transactions
     * 24-hour online Internet account access and transactions

    You will find more information  about these choices in our Investor Services
    Guide,  which you may  request  by  calling  us,  accessing  our Web site or
    visiting one of our Investor Centers.

    Information   contained  in  our  Investor   Services   Guide   pertains  to
    shareholders  who invest directly with American  Century rather than through
    an employer-sponsored retirement plan or financial intermediary.

    If  you  own  or  are   considering   purchasing   fund  shares  through  an
    employer-sponsored  retirement plan or financial intermediary,  your ability
    to purchase  shares of the fund,  exchange them for shares of other American
    Century  funds,  and  redeem  them will  depend on the terms of your plan or
    financial  intermediary.  If  you  have  questions  about  investing  in  an
    employer-sponsored retirement plan or through a financial intermediary, call
    a Service Representative at 1-800-345-3533.

- --------------------------------------------------------------------------------
[american century logo(reg. sm)]
AMERICAN
CENTURY

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

INVESTOR RELATIONS
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

FAX
816-340-7962

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

BUSINESS, NOT-FOR-PROFIT AND
EMPLOYER-SPONSORED RETIREMENT PLANS
1-800-345-353

Visit our Web site at WWW.AMERICANCENTURY.COM  [link to web site with arrow]

SH-PRF-16137   9904                                   Funds Distributor, Inc.


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