American Century Brokerage

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American Century
Investments
Fund Profile

INVESTOR CLASS
California Tax-Free Money Market Fund

April 28, 2006

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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California Tax-Free Money Market Fund

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

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

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

    The fund's assets are invested in high-quality, very short-term debt
    securities of which at least 80% must have interest payments exempt from
    federal and California income taxes. Cities, counties and other
    municipalities in California and U.S. territories, such as Puerto Rico,
    usually issue these securities for public projects, such as schools and
    roads. Income from these securities is exempt from regular federal income
    tax, state tax and alternative minimum tax.

    Additional information about California Tax-Free Money Market's investments
    is available in its annual and semi-annual 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 high-quality, very short-term debt securities are among the
      safest securities available, the interest they  pay is among the lowest
      for income-paying securities. Accordingly, the yield on this fund will
      likely be lower than funds that invest in longer-term or lower-quality
      securities.

    * Because the fund invests in California municipal
      securities, it will be sensitive to events that affect California's
      economy. California 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 California 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)
    ----------------------------------------------------------------------------
    2005               1.94%
    2004               0.76%
    2003               0.60%
    2002               1.06%
    2001               2.20%
    2000               3.30%
    1999               2.66%
    1998               2.95%
    1997               3.19%
    1996               3.07%
    ----------------------------------------------------------------------------

        (1) As of March 31, 2006, the end of the most recent calendar quarter,
            California Tax-Free Money Market'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
    ---------------------------------------------------------------------------
    California Tax-Free
      Money Market           0.89% (2Q 2000)        0.10% (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
    ----------------------------------------------------------------------------
     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED MARCH 31, 2006)
    ----------------------------------------------------------------------------
         California Tax-Free
           Money Market           2.25%          1.31%          2.16%
    ----------------------------------------------------------------------------

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 $20 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                               0.03%(2)
         Total Annual Fund Operating Expenses         0.52%
    ----------------------------------------------------------------------------

        (1) The fund pays the advisor a single, unified management fee for
            arranging all services necessary for the fund to operate. The fee
            shown is based on assets during the fund's most recent fiscal year.
            The fund has a stepped fee schedule. As a result, the fund's unified
            management fee rate generally decreases as fund assets increase and
            increase as fund 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
    ---------------------------------------------------------------------------
                   $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.

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
    California Tax-Free Money Market:

    TODD PARDULA, Vice President and Portfolio Manager, has been a member of the
    California Tax-Free Money Market team since April 1994. He joined American
    Century in February 1990 and became a portfolio manager in April 1994. He
    has a bachelor's degree in finance from Santa Clara University. He is a CFA
    charterholder.

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

    *  Call us and send your investment by bank wire transfer

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

    Your initial investment in your brokerage account must be at least $2,500.
    If your brokerage 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 California 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 California and federal income taxes.
    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-48874   0604                 American Century Investment Services, Inc.,
                                    Distributor