American Century Brokerage

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American Century
Investments
Fund Profile

INVESTOR CLASS
Tax-Free Money Market Fund

October 31, 2005

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.

You may obtain the prospectus and other information about the fund at no cost by
calling us at 1-888-345-2071, accessing our Web site or visiting one of our
Investor Centers. See the back cover for additional telephone numbers and our
address.

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Tax-Free Money Market Fund

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

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

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

    The portfolio managers invest at least 80% of the fund's assets in
    cash-equivalent, high-quality debt securities with interest 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 portfolio managers also may buy cash-equivalent, high-quality debt
    securities with interest payments exempt from regular federal income tax,
    but not exempt from 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.

    Additional information about Tax-Free Money Market'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?

*    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.  Although  the fund seeks to preserve the value of your
     investment at $1.00 per share, it is possible to lose money by investing in
     the fund.

*    Because  cash-equivalent  securities  are among the least risky  securities
     available,  the interest  they pay is among the lowest for  interest-paying
     securities.  Accordingly,  the yield on this fund will likely be lower than
     funds that invest in longer-term or lower-quality securities.

*    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.  Tax-Free Money Market
     may have a higher level of risk than funds that invest in a larger universe
     of securities.

*    There is no guarantee that all of the fund's income will remain exempt from
     federal or state income taxes.  Income from municipal  bonds held by a fund
     could be  declared  taxable  because  of  unfavorable  changes in tax laws,
     adverse  interpretations  by the  Internal  Revenue  Service  or state  tax
     authorities, or noncompliant conduct of a bond issuer.


    FUND PERFORMANCE

    The following bar chart shows the actual performance of Tax-Free Money
    Market'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. Account fees are not
    reflected in the chart below. If they had been included, returns would be
    lower than those shown.

    Calendar Year-By-Year Returns(1)(2)
    2004               0.87%
    2003               0.73%
    2002               1.18%
    2001               2.52%
    2000               3.82%
    1999               2.97%
    1998               3.47%
    1997               3.43%
    1996               2.98%
    1995               3.36%

    (1) From August 1, 1997 to December 31, 1998, all or a portion of the
        fund's management fee was waived. As a result, the fund's returns are
        higher than they would have been had the waiver not been in effect.

    (2) As of September 30, 2005, the end of the most recent calendar
        quarter, Tax-Free Money Market's year-to-date return was 1.41%.

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

                             Highest                Lowest
    ---------------------------------------------------------------------------
    Tax-Free Money Market    1.01% (4Q 2000)        0.14% (3Q 2003)

    The following table shows the average annual total returns of the fund's
    shares for the periods indicated. For current performance information,
    including yields, please call us or access our Web site.

                                     1 YEAR        5 YEARS          10 YEARS(1)
    ---------------------------------------------------------------------------
    AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED SEPTEMBER 30, 2005)
    ---------------------------------------------------------------------------
       Tax-Free Money Market         1.74%         1.54%             2.42%

    (1) From August 1, 1997, to December 31, 1998, all or a portion of the
        fund's management fee was waived. As a result, the fund's returns are
        higher than they would have been had the waiver not been in effect.

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 funds
    * to redeem your shares, other than a $10 fee to redeem by wire

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

    SHAREHOLDER FEES (FEES PAID DIRECTLY FROM YOUR INVESTMENT)
    ---------------------------------------------------------------------------
         Maximum Account Maintenance Fee                  $25(1)

    (1) Applies only to investors whose total eligible investments with
        American Century are less than $10,000.

    ANNUAL FUND OPERATING EXPENSES
    (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
    ---------------------------------------------------------------------------
         Management Fee                               0.49%(1)
         Distribution and Service (12b-1) Fees        None
         Other Expenses                               0.02%(2)
         Total Annual Fund Operating Expenses         0.51%

    (1) Based on assets 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 assets increase and increases as assets decrease.

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

        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 and analysts working together to manage its mutual funds.
    Identified below is the portfolio manager who leads the team that manages
    Tax-Free Money Market:

    ALAN KRUSS, Portfolio Manager, is the manager of the Tax-Free Money Market
    fund. He joined American Century in 1997. He became a trader in February
    2000 and then became a portfolio manager in December 2001. He has a
    bachelor's degree in finance from San Francisco State University.

6. HOW DO I BUY FUND SHARES?

    American Century Brokerage offers several ways to  purchase shares

    * Complete and return a brokerage application along with an investment check
      payable to American Century Brokerage

    * If you already have an American Century Brokerage account, simply contact
      us by writing, calling or accessing our Web site

    * Call us and send your investment by bank wire transfer

    Your initial investment in your brokerage account must be at least $2,500.
    If your account balance falls below this account minimum, your shares may be
    redeemed involuntarily.

7. HOW DO I SELL FUND SHARES?

   The most convenient way for you to sell money market fund shares in your
   brokerage account is to use our CheckWriting feature. If you do not have
   checks, you can call us during business hours or send us a letter requesting
   a redemption check or bank wire. Bank wires require a minimum redemption of
   $1,000 and a $20 fee applies. In addition, we will automatically sell
   sufficient shares in Tax-Free Money Market when you direct us to make other
   investments in your brokerage account.

   Depending on the options you select when you open your account, some
   restrictions may apply. For your protection, some redemption requests may
   require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

   Dividends are declared and available for redemption daily. 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 Brokerage offers several ways to make it easier for you to
   manage your account, such as

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

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

AMERICAN CENTURY BROKERAGE, INC.
P.O. BOX 419146
KANSAS CITY, MISSOURI 64141-6146

AMERICANCENTURY.COM

BROKERAGE CLIENT RELATIONS ASSOCIATE
1-888-345-2071

FAX
650-967-9627

TELESELECT AUTOMATED INFORMATION AND TRADING LINE
1-888-345-2091

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113

SEP-IRA SERVICES
1-800-345-3533, ext. 4210

                        The American Century Investments logo, American Century
                        and American Century Investments are service marks of
                        American Century Proprietary Holdings, Inc.

BK-PRF-45919   0510     American Century Investment Services, Inc., Distributor