497

California Long-Term Tax-Free Fund

(the "Fund")

August 18, 2017

EXPLANATORY NOTE

On behalf of the Fund, a series of American Century California Tax-Free and Municipal Funds (the “Corporation”), and pursuant to Rule 497(e) under the Securities Act of 1933, as amended (the “Securities Act”), the purpose of this filing is to submit an interactive data file in the manner provided by Rule 405 of Regulation S-T and General Instruction C.3.(g) of Form N-1A. The interactive data file included as an exhibit to this filing relates to the prospectus supplement filed with the Securities and Exchange Commission on behalf of the Corporation pursuant to Rule 497(e) under the Securities Act on July 28, 2017; such filing (Accession Number 0000717316-17-000057) is incorporated by reference into this Rule 497 Document.

EXHIBIT INDEX

EXHIBIT NUMBER	DESCRIPTION OF DOCUMENT
Exhibit - 101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
Exhibit - 101.INS	XBRL Instance Document
Exhibit - 101.SCH	XBRL Taxonomy Extension Schema Document
Exhibit - 101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
Exhibit - 101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
Exhibit - 101.LAB	XBRL Taxonomy Extension Label Linkbase Document

XML

Jul. 31, 2017

AMERICAN CENTURY CALIFORNIA TAX FREE & MUNICIPAL FUNDS

American Century California Tax-Free and Municipal Funds

Summary Prospectus and Prospectus Supplement

California Long-Term Tax-Free Fund

Supplement dated July 31, 2017 nSummaryProspectus and Prospectus dated January 1, 2017

The Board of Trustees has approved an agreement and plan of reorganization, whereby the net assets of California Long-Term Tax-Free Fund will be transferred to California Intermediate-Term Tax-Free Bond Fund in exchange for shares of California Intermediate-Term Tax-Free Bond Fund (the “Reorganization”). The Board, including the Trustees who are not deemed to be “interested persons” pursuant to Section 2(a)(19) of the Investment Company Act of 1940, as amended, considered the proposed Reorganization and determined that it is in the best interests of each fund and would not dilute the interests of either fund’s shareholders. The Reorganization does not require a shareholder vote.

The Reorganization is expected to be effective on October 20, 2017, as of the close of the New York Stock Exchange (“NYSE”). California Long-Term Tax-Free Fund’s Investor, I, A, and C Class shareholders will receive shares of equal value of the corresponding class of California Intermediate-Term Tax-Free Bond Fund in exchange for their shares of California Long-Term Tax-Free Fund. The value of a shareholder’s account will not change as a result of the transaction.

It is expected that the Reorganization will qualify as a tax-free reorganization for federal income tax purposes and that shareholders will not recognize any gain or loss as a result of the Reorganization. Shareholders will receive a distribution of substantially all net income and/or realized gains, if any, prior to the Reorganization.

California Long-Term Tax-Free Fund and California Intermediate-Term Tax-Free Bond Fund have investment objectives and strategies that are substantially similar and their total expense ratios are expected to be the same. In preparation for the Reorganization, California Long-Term Tax-Free’s weighted average maturity may fall below 10 years.

Effective October 17, 2017, as of the close of the NYSE, California Long-Term Tax-Free Fund will be closed to all investments, except reinvested dividends and capital gains distributions.

For additional information about the funds, please refer to the funds’ prospectus and statement of additional information, which are available at americancentury.com and can also be obtained by calling us at 1-800-345-2021 (retail investors) or 1-800-345-6488 (financial professionals).

The following sub-section is added in the Additional Policies Affecting Your Investment section after the sub-section Redemption of Shares in Accounts Below Minimum on page 17 of the prospectus.

Small Distributions and Uncashed Distribution Checks

Generally, dividends and distributions cannot be paid by check for an amount less than $50. Any such amount will be automatically reinvested in additional shares. The fund reserves the right to reinvest any dividend or distribution amount you elect to receive by check if your check is returned as undeliverable or if you do not cash your check within six months. Interest will not accrue on the amount of your uncashed check. We will reinvest your check into your account at the NAV on the day of reinvestment. When reinvested, those amounts are subject to the risk of loss like any other fund investment. We also reserve the right to change your election to receive dividends and distributions in cash after a check is returned undeliverable or uncashed for the six month period, and we may automatically reinvest all future dividends and distributions at the NAV on the date of the payment.

©2017 American Century Proprietary Holdings, Inc. All rights reserved.

CL-SPL-93031 1707

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497

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Jul. 28, 2017

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AMERICAN CENTURY CALIFORNIA TAX FREE & MUNICIPAL FUNDS

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0000717316

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Jul. 28, 2017

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Jan. 01, 2017

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Jan. 01, 2017

AMERICAN CENTURY CALIFORNIA TAX FREE & MUNICIPAL FUNDS

Prospectus:

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Supplement [Text Block]

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American Century California Tax-Free and Municipal Funds

Summary Prospectus and Prospectus Supplement

California Long-Term Tax-Free Fund

Supplement dated July 31, 2017 nSummaryProspectus and Prospectus dated January 1, 2017

The Board of Trustees has approved an agreement and plan of reorganization, whereby the net assets of California Long-Term Tax-Free Fund will be transferred to California Intermediate-Term Tax-Free Bond Fund in exchange for shares of California Intermediate-Term Tax-Free Bond Fund (the “Reorganization”). The Board, including the Trustees who are not deemed to be “interested persons” pursuant to Section 2(a)(19) of the Investment Company Act of 1940, as amended, considered the proposed Reorganization and determined that it is in the best interests of each fund and would not dilute the interests of either fund’s shareholders. The Reorganization does not require a shareholder vote.

The Reorganization is expected to be effective on October 20, 2017, as of the close of the New York Stock Exchange (“NYSE”). California Long-Term Tax-Free Fund’s Investor, I, A, and C Class shareholders will receive shares of equal value of the corresponding class of California Intermediate-Term Tax-Free Bond Fund in exchange for their shares of California Long-Term Tax-Free Fund. The value of a shareholder’s account will not change as a result of the transaction.

It is expected that the Reorganization will qualify as a tax-free reorganization for federal income tax purposes and that shareholders will not recognize any gain or loss as a result of the Reorganization. Shareholders will receive a distribution of substantially all net income and/or realized gains, if any, prior to the Reorganization.

California Long-Term Tax-Free Fund and California Intermediate-Term Tax-Free Bond Fund have investment objectives and strategies that are substantially similar and their total expense ratios are expected to be the same. In preparation for the Reorganization, California Long-Term Tax-Free’s weighted average maturity may fall below 10 years.

Effective October 17, 2017, as of the close of the NYSE, California Long-Term Tax-Free Fund will be closed to all investments, except reinvested dividends and capital gains distributions.

For additional information about the funds, please refer to the funds’ prospectus and statement of additional information, which are available at americancentury.com and can also be obtained by calling us at 1-800-345-2021 (retail investors) or 1-800-345-6488 (financial professionals).

The following sub-section is added in the Additional Policies Affecting Your Investment section after the sub-section Redemption of Shares in Accounts Below Minimum on page 17 of the prospectus.

Small Distributions and Uncashed Distribution Checks

Generally, dividends and distributions cannot be paid by check for an amount less than $50. Any such amount will be automatically reinvested in additional shares. The fund reserves the right to reinvest any dividend or distribution amount you elect to receive by check if your check is returned as undeliverable or if you do not cash your check within six months. Interest will not accrue on the amount of your uncashed check. We will reinvest your check into your account at the NAV on the day of reinvestment. When reinvested, those amounts are subject to the risk of loss like any other fund investment. We also reserve the right to change your election to receive dividends and distributions in cash after a check is returned undeliverable or uncashed for the six month period, and we may automatically reinvest all future dividends and distributions at the NAV on the date of the payment.

©2017 American Century Proprietary Holdings, Inc. All rights reserved.

CL-SPL-93031 1707