AMERICAN CENTURY CALIFORNIA TAX FREE & MUNICIPAL FUNDS
485BXT, 1998-12-11
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               SECURITIES AND EXCHANGE COMMISSION
                    Washington, D.C.   20549

                           FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933               [X]

     Pre-Effective Amendment No.                                      [ ]

     Post-Effective Amendment No. 27                                  [X]

                             and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940       [X]

     Amendment No. 31                                                 [X]

                        (Check appropriate box or boxes.)


            AMERICAN CENTURY CALIFORNIA TAX-FREE AND MUNICIPAL FUNDS
       _________________________________________________________________
               (Exact Name of Registrant as Specified in Charter)


                  4500 Main Street, Kansas City, MO 64141-6200
       _________________________________________________________________
               (Address of Principal Executive Offices) (Zip Code)


       Registrant's Telephone Number, including Area Code: (816) 531-5575


         William M. Lyons, 4500 Main Street, Kansas City, MO 64141-6200
       _________________________________________________________________
                     (Name and Address of Agent for Service)

          Approximate Date of Proposed Public Offering: January 1, 1999

It is proposed that this filing will become effective (check
appropriate box)

     [ ] immediately upon filing pursuant to paragraph (b)
     [X] on January 1, 1999 pursuant to paragraph (b)
     [ ] 60 days after filing pursuant to paragraph (a)(1)
     [ ] on (date) pursuant to paragraph (a)(1)
     [ ] 75 days after filing pursuant to paragraph (a)(2)
     [ ] on (date) pursuant to paragraph (a)(2) of rule 485.

If appropriate, check the following box:

     [X] This post-effective amendment designates a new effective date for a 
         previously filed post-effective amendment.


- --------------------------------------------------------------------------------
<PAGE>
This  filing  is  being  made  to  extend  the  date  of  effectiveness  of  the
Registrant's   Post-Effective   Amendment  No.  26  to  January  1,  1999.   The
Post-Effective  Amendment originally requested  effectiveness as of December 14,
1998.

The following documents are hereby incorporated by reference:

*   Prospectus  for the California  Tax-Free and Municipal  Funds dated December
    14, 1998 filed  pursuant to Rule 485(a) on October 16, 1998  (Accession  No.
    0000717316-98-000009).

*   Statement  of  Additional   Information  for  the  California  Tax-Free  and
    Municipal  Funds dated  December  14, 1998 filed  pursuant to Rule 485(a) on
    October 16, 1998 (Accession No. 0000717316-98-000009).

*   Part  C to  the  Registration  Statement  of  the  California  Tax-Free  and
    Municipal  Funds dated  December  14, 1998 filed  pursuant to Rule 485(a) on
    October 16, 1998 (Accession No. 0000717316-98-000009).

Registrant is extending  effectiveness of its Registration Statement in order to
incorporate comments provided to its manager by the staff of the Commission.
<PAGE>
                                   SIGNATURES

Pursuant to the  requirements  of the  Securities Act of 1933 and the Investment
Company Act of 1940, the Registrant certifies that it meets all the requirements
for  effectiveness  of this 1933  Post-Effective  Amendment  No. 27 and 1940 Act
Amendment  No.  31  to  its  Registration  Statement  pursuant  to  Rule  485(b)
promogulated  under the Securities Act of 1933, as amended,  and has duly caused
this Post-Effective Amendment No. 27/Amendment No. 31 to be signed on its behalf
by the undersigned,  thereunto duly authorized,  in the City of Kansas City, and
State of Missouri, on the 11th day of December, 1998.

                     AMERICAN CENTURY CALIFORNIA TAX-FREE AND MUNICIPAL FUNDS


                     By:  /*/George A. Rio
                          George A. Rio
                          President and Principal Executive Officer

Pursuant to the requirements of the Securities Act of 1933, this  Post-Effective
Amendment No. 27/Amendment No. 31 has been signed below by the following persons
in the capacities and on the dates indicated.

<TABLE>
<CAPTION>
                                                                                   Date
<S>                                  <C>                                           <C>
*                                    President, Principal Executive and            December 11, 1998
- ---------------------------------    Principal Financial Officer
George A. Rio

*                                    Vice President and Treasurer                  December 11, 1998
- ---------------------------------
Maryanne Roepke

*                                    Chairman of the Board and Trustee             December 11, 1998
- ---------------------------------    
James E. Stowers III

*                                    Trustee                                       December 11, 1998
- ---------------------------------    
William M. Lyons

*                                    Trustee                                       December 11, 1998
- ---------------------------------
Albert A. Eisenstat

*                                    Trustee                                       December 11, 1998
- ---------------------------------
Ronald J. Gilson

*                                    Trustee                                       December 11, 1998
- ---------------------------------
Myron S. Scholes

*                                    Trustee                                       December 11, 1998
- ---------------------------------
Kenneth E. Scott

*                                    Trustee                                       December 11, 1998
- ---------------------------------
Isaac Stein

*                                    Trustee                                       December 11, 1998
- ---------------------------------
Jeanne D. Wohlers

</TABLE>
/s/Charles A. Etherington
*by Charles A.  Etherington,  Attorney in Fact  (pursuant to a Power of Attorney
dated July 9, 1998).

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM THE ANNUAL
REPORT OF  AMERICAN  CENTURY  CALIFORNIA  TAX-FREE  AND  MUNICIPAL  FUNDS AND IS
QUALIFIED IN ITS ENTIRELY BY REFERENCE TO SUCH REPORT.
</LEGEND>
<CIK> 0000717316
<NAME> AMERICAN CENTURY CALIFORNIA TAX-FREE & MUNICIPAL FUNDS
<SERIES>
   <NUMBER> 1
   <NAME> BENHAM CALIFORNIA TAX-FREE MONEY MARKET FUND
       
<S>                      <C>
<PERIOD-TYPE>                                    12-MOS
<FISCAL-YEAR-END>                                AUG-31-1998
<PERIOD-END>                                     AUG-31-1998
<INVESTMENTS-AT-COST>                               456,861,275
<INVESTMENTS-AT-VALUE>                              456,861,275
<RECEIVABLES>                                         2,351,137
<ASSETS-OTHER>                                        1,121,640
<OTHER-ITEMS-ASSETS>                                          0
<TOTAL-ASSETS>                                      460,334,052
<PAYABLE-FOR-SECURITIES>                              2,427,024
<SENIOR-LONG-TERM-DEBT>                                       0
<OTHER-ITEMS-LIABILITIES>                             1,913,468
<TOTAL-LIABILITIES>                                   4,340,492
<SENIOR-EQUITY>                                     455,993,563
<PAID-IN-CAPITAL-COMMON>                                      0
<SHARES-COMMON-STOCK>                               455,993,560
<SHARES-COMMON-PRIOR>                               417,784,475
<ACCUMULATED-NII-CURRENT>                               299,086
<OVERDISTRIBUTION-NII>                                        0
<ACCUMULATED-NET-GAINS>                               (299,089)
<OVERDISTRIBUTION-GAINS>                                      0
<ACCUM-APPREC-OR-DEPREC>                                      0
<NET-ASSETS>                                        455,993,560
<DIVIDEND-INCOME>                                             0
<INTEREST-INCOME>                                    15,542,270
<OTHER-INCOME>                                                0
<EXPENSES-NET>                                        2,171,919
<NET-INVESTMENT-INCOME>                              13,370,351
<REALIZED-GAINS-CURRENT>                                      0
<APPREC-INCREASE-CURRENT>                                     0
<NET-CHANGE-FROM-OPS>                                13,369,771
<EQUALIZATION>                                                0
<DISTRIBUTIONS-OF-INCOME>                            13,369,357
<DISTRIBUTIONS-OF-GAINS>                                      0
<DISTRIBUTIONS-OTHER>                                         0
<NUMBER-OF-SHARES-SOLD>                             434,812,626
<NUMBER-OF-SHARES-REDEEMED>                         409,349,170
<SHARES-REINVESTED>                                  12,745,632
<NET-CHANGE-IN-ASSETS>                               38,209,502
<ACCUMULATED-NII-PRIOR>                                 397,834
<ACCUMULATED-GAINS-PRIOR>                             (398,251)
<OVERDISTRIB-NII-PRIOR>                                       0
<OVERDIST-NET-GAINS-PRIOR>                                    0
<GROSS-ADVISORY-FEES>                                 2,159,270
<INTEREST-EXPENSE>                                            0
<GROSS-EXPENSE>                                       2,171,919
<AVERAGE-NET-ASSETS>                                435,217,099
<PER-SHARE-NAV-BEGIN>                                      1.00
<PER-SHARE-NII>                                            0.03
<PER-SHARE-GAIN-APPREC>                                    0.00
<PER-SHARE-DIVIDEND>                                       0.03
<PER-SHARE-DISTRIBUTIONS>                                  0.00
<RETURNS-OF-CAPITAL>                                       0.00
<PER-SHARE-NAV-END>                                        1.00
<EXPENSE-RATIO>                                            0.50
<AVG-DEBT-OUTSTANDING>                                        0
<AVG-DEBT-PER-SHARE>                                       0.00
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM THE ANNUAL
REPORT OF  AMERICAN  CENTURY  CALIFORNIA  TAX-FREE  AND  MUNICIPAL  FUNDS AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH REPORT.
</LEGEND>
<CIK> 0000717316
<NAME> AMERICAN CENTURY CALIFORNIA TAX-FREE & MUNICIPAL FUNDS
<SERIES>
   <NUMBER> 2
   <NAME> BENHAM CALIFORNIA MUNICIPAL MONEY MARKET FUND
       
<S>                      <C>
<PERIOD-TYPE>                                           12-MOS
<FISCAL-YEAR-END>                                       AUG-31-1998
<PERIOD-END>                                            AUG-31-1998
<INVESTMENTS-AT-COST>                                   172,403,052
<INVESTMENTS-AT-VALUE>                                  172,403,052
<RECEIVABLES>                                               783,271
<ASSETS-OTHER>                                            1,795,748
<OTHER-ITEMS-ASSETS>                                              0
<TOTAL-ASSETS>                                          174,982,071
<PAYABLE-FOR-SECURITIES>                                          0
<SENIOR-LONG-TERM-DEBT>                                           0
<OTHER-ITEMS-LIABILITIES>                                 2,390,449
<TOTAL-LIABILITIES>                                       2,390,449
<SENIOR-EQUITY>                                         172,628,461
<PAID-IN-CAPITAL-COMMON>                                          0
<SHARES-COMMON-STOCK>                                   172,591,622
<SHARES-COMMON-PRIOR>                                   170,519,185
<ACCUMULATED-NII-CURRENT>                                   122,436
<OVERDISTRIBUTION-NII>                                            0
<ACCUMULATED-NET-GAINS>                                   (159,275)
<OVERDISTRIBUTION-GAINS>                                          0
<ACCUM-APPREC-OR-DEPREC>                                          0
<NET-ASSETS>                                            172,591,622
<DIVIDEND-INCOME>                                                 0
<INTEREST-INCOME>                                         6,258,285
<OTHER-INCOME>                                                    0
<EXPENSES-NET>                                              854,000
<NET-INVESTMENT-INCOME>                                   5,404,285
<REALIZED-GAINS-CURRENT>                                      (669)
<APPREC-INCREASE-CURRENT>                                         0
<NET-CHANGE-FROM-OPS>                                     5,403,616
<EQUALIZATION>                                                    0
<DISTRIBUTIONS-OF-INCOME>                                 5,398,614
<DISTRIBUTIONS-OF-GAINS>                                          0
<DISTRIBUTIONS-OTHER>                                             0
<NUMBER-OF-SHARES-SOLD>                                 153,582,331
<NUMBER-OF-SHARES-REDEEMED>                             156,647,128
<SHARES-REINVESTED>                                       5,174,073
<NET-CHANGE-IN-ASSETS>                                    2,114,278
<ACCUMULATED-NII-PRIOR>                                     116,795
<ACCUMULATED-GAINS-PRIOR>                                 (158,606)
<OVERDISTRIB-NII-PRIOR>                                           0
<OVERDIST-NET-GAINS-PRIOR>                                        0
<GROSS-ADVISORY-FEES>                                       845,834
<INTEREST-EXPENSE>                                                0
<GROSS-EXPENSE>                                             854,000
<AVERAGE-NET-ASSETS>                                    171,283,170
<PER-SHARE-NAV-BEGIN>                                          1.00
<PER-SHARE-NII>                                                0.03
<PER-SHARE-GAIN-APPREC>                                        0.00
<PER-SHARE-DIVIDEND>                                           0.03
<PER-SHARE-DISTRIBUTIONS>                                      0.00
<RETURNS-OF-CAPITAL>                                           0.00
<PER-SHARE-NAV-END>                                            1.00
<EXPENSE-RATIO>                                                0.50
<AVG-DEBT-OUTSTANDING>                                            0
<AVG-DEBT-PER-SHARE>                                           0.00
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM THE ANNUAL
REPORT OF  AMERICAN  CENTURY  CALIFORNIA  TAX-FREE  AND  MUNICIPAL  FUNDS AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH REPORT.
</LEGEND>
<CIK> 0000717316
<NAME> AMERICAN CENTURY CALIFORNIA TAX-FREE & MUNICIPAL FUNDS
<SERIES>
   <NUMBER> 3
   <NAME> BENHAM CALIFORNIA INTERMEDIATE TERM TAX-FREE
       
<S>                      <C>
<PERIOD-TYPE>                                       12-MOS
<FISCAL-YEAR-END>                                   AUG-31-1998
<PERIOD-END>                                        AUG-31-1998
<INVESTMENTS-AT-COST>                                 439,449,344
<INVESTMENTS-AT-VALUE>                                463,133,282
<RECEIVABLES>                                          15,078,433
<ASSETS-OTHER>                                            397,245
<OTHER-ITEMS-ASSETS>                                            0
<TOTAL-ASSETS>                                        478,608,960
<PAYABLE-FOR-SECURITIES>                               14,363,084
<SENIOR-LONG-TERM-DEBT>                                         0
<OTHER-ITEMS-LIABILITIES>                               3,642,037
<TOTAL-LIABILITIES>                                    18,005,121
<SENIOR-EQUITY>                                           405,064
<PAID-IN-CAPITAL-COMMON>                              433,907,523
<SHARES-COMMON-STOCK>                                  40,506,442
<SHARES-COMMON-PRIOR>                                  38,621,249
<ACCUMULATED-NII-CURRENT>                                       0
<OVERDISTRIBUTION-NII>                                      8,020
<ACCUMULATED-NET-GAINS>                                 2,559,294
<OVERDISTRIBUTION-GAINS>                                        0
<ACCUM-APPREC-OR-DEPREC>                               23,683,938
<NET-ASSETS>                                          460,603,839
<DIVIDEND-INCOME>                                               0
<INTEREST-INCOME>                                      22,679,637
<OTHER-INCOME>                                                  0
<EXPENSES-NET>                                          2,277,153
<NET-INVESTMENT-INCOME>                                20,402,484
<REALIZED-GAINS-CURRENT>                                3,919,772
<APPREC-INCREASE-CURRENT>                               5,632,637
<NET-CHANGE-FROM-OPS>                                  29,954,893
<EQUALIZATION>                                                  0
<DISTRIBUTIONS-OF-INCOME>                              20,402,484
<DISTRIBUTIONS-OF-GAINS>                                5,651,243
<DISTRIBUTIONS-OTHER>                                           0
<NUMBER-OF-SHARES-SOLD>                                13,806,443
<NUMBER-OF-SHARES-REDEEMED>                            13,662,495
<SHARES-REINVESTED>                                     1,741,245
<NET-CHANGE-IN-ASSETS>                                 25,164,000
<ACCUMULATED-NII-PRIOR>                                         0
<ACCUMULATED-GAINS-PRIOR>                               4,338,785
<OVERDISTRIB-NII-PRIOR>                                         0
<OVERDIST-NET-GAINS-PRIOR>                                      0
<GROSS-ADVISORY-FEES>                                   2,264,194
<INTEREST-EXPENSE>                                              0
<GROSS-EXPENSE>                                         2,277,153
<AVERAGE-NET-ASSETS>                                  437,512,837
<PER-SHARE-NAV-BEGIN>                                       11.27
<PER-SHARE-NII>                                              0.52
<PER-SHARE-GAIN-APPREC>                                      0.25
<PER-SHARE-DIVIDEND>                                         0.52
<PER-SHARE-DISTRIBUTIONS>                                    0.15
<RETURNS-OF-CAPITAL>                                         0.00
<PER-SHARE-NAV-END>                                         11.37
<EXPENSE-RATIO>                                              0.51
<AVG-DEBT-OUTSTANDING>                                          0
<AVG-DEBT-PER-SHARE>                                            0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM THE ANNUAL
REPORT OF  AMERICAN  CENTURY  CALIFORNIA  TAX-FREE  AND  MUNICIPAL  FUNDS AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH REPORT.
</LEGEND>
<CIK> 0000717316
<NAME> AMERICAN CENTURY CALIFORNIA TAX-FREE & MUNICIPAL FUNDS
<SERIES>
   <NUMBER> 4
   <NAME> BENHAM CALIFORNIA LONG-TERM TAX-FREE FUND
       
<S>                      <C>
<PERIOD-TYPE>                                     12-MOS
<FISCAL-YEAR-END>                                 AUG-31-1998
<PERIOD-END>                                      AUG-31-1998
<INVESTMENTS-AT-COST>                               299,379,367
<INVESTMENTS-AT-VALUE>                              324,678,249
<RECEIVABLES>                                         3,906,560
<ASSETS-OTHER>                                          500,990
<OTHER-ITEMS-ASSETS>                                          0
<TOTAL-ASSETS>                                      329,088,799
<PAYABLE-FOR-SECURITIES>                              2,243,761
<SENIOR-LONG-TERM-DEBT>                                       0
<OTHER-ITEMS-LIABILITIES>                             1,651,382
<TOTAL-LIABILITIES>                                   3,895,143
<SENIOR-EQUITY>                                         277,428
<PAID-IN-CAPITAL-COMMON>                            297,953,010
<SHARES-COMMON-STOCK>                                27,742,768
<SHARES-COMMON-PRIOR>                                26,542,552
<ACCUMULATED-NII-CURRENT>                                 9,033
<OVERDISTRIBUTION-NII>                                        0
<ACCUMULATED-NET-GAINS>                               1,655,303
<OVERDISTRIBUTION-GAINS>                                      0
<ACCUM-APPREC-OR-DEPREC>                             25,298,882
<NET-ASSETS>                                        325,193,656
<DIVIDEND-INCOME>                                             0
<INTEREST-INCOME>                                    17,485,505
<OTHER-INCOME>                                                0
<EXPENSES-NET>                                        1,610,506
<NET-INVESTMENT-INCOME>                              15,874,999
<REALIZED-GAINS-CURRENT>                              2,963,978
<APPREC-INCREASE-CURRENT>                             8,929,558
<NET-CHANGE-FROM-OPS>                                27,768,535
<EQUALIZATION>                                                0
<DISTRIBUTIONS-OF-INCOME>                            15,874,999
<DISTRIBUTIONS-OF-GAINS>                              5,354,293
<DISTRIBUTIONS-OTHER>                                         0
<NUMBER-OF-SHARES-SOLD>                               8,544,372
<NUMBER-OF-SHARES-REDEEMED>                           8,606,849
<SHARES-REINVESTED>                                   1,262,693
<NET-CHANGE-IN-ASSETS>                               20,523,088
<ACCUMULATED-NII-PRIOR>                                       0
<ACCUMULATED-GAINS-PRIOR>                             4,054,651
<OVERDISTRIB-NII-PRIOR>                                       0
<OVERDIST-NET-GAINS-PRIOR>                                    0
<GROSS-ADVISORY-FEES>                                 1,599,824
<INTEREST-EXPENSE>                                            0
<GROSS-EXPENSE>                                       1,610,506
<AVERAGE-NET-ASSETS>                                308,905,669
<PER-SHARE-NAV-BEGIN>                                     11.48
<PER-SHARE-NII>                                            0.59
<PER-SHARE-GAIN-APPREC>                                    0.44
<PER-SHARE-DIVIDEND>                                       0.59
<PER-SHARE-DISTRIBUTIONS>                                  0.20
<RETURNS-OF-CAPITAL>                                       0.00
<PER-SHARE-NAV-END>                                       11.72
<EXPENSE-RATIO>                                            0.51
<AVG-DEBT-OUTSTANDING>                                        0
<AVG-DEBT-PER-SHARE>                                       0.00
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM THE ANNUAL
REPORT OF  AMERICAN  CENTURY  CALIFORNIA  TAX-FREE  AND  MUNICIPAL  FUNDS AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH REPORT.
</LEGEND>
<CIK> 0000717316
<NAME> AMERICAN CENTURY CALIFORNIA TAX-FREE & MUNICIPAL FUNDS
<SERIES>
   <NUMBER> 5
   <NAME> BENHAM CALIFORNIA HIGH-YIELD MUNICIPAL FUND
       
<S>                      <C>
<PERIOD-TYPE>                                     12-MOS
<FISCAL-YEAR-END>                                 AUG-31-1998
<PERIOD-END>                                      AUG-31-1998
<INVESTMENTS-AT-COST>                               288,259,202
<INVESTMENTS-AT-VALUE>                              303,455,303
<RECEIVABLES>                                         5,054,723
<ASSETS-OTHER>                                          927,416
<OTHER-ITEMS-ASSETS>                                          0
<TOTAL-ASSETS>                                      309,437,442
<PAYABLE-FOR-SECURITIES>                              4,899,944
<SENIOR-LONG-TERM-DEBT>                                       0
<OTHER-ITEMS-LIABILITIES>                               695,958
<TOTAL-LIABILITIES>                                   5,595,902
<SENIOR-EQUITY>                                         305,942
<PAID-IN-CAPITAL-COMMON>                            286,338,115
<SHARES-COMMON-STOCK>                                30,594,204
<SHARES-COMMON-PRIOR>                                19,919,066
<ACCUMULATED-NII-CURRENT>                                     0
<OVERDISTRIBUTION-NII>                                        0
<ACCUMULATED-NET-GAINS>                               2,001,382
<OVERDISTRIBUTION-GAINS>                                      0
<ACCUM-APPREC-OR-DEPREC>                             15,196,101
<NET-ASSETS>                                        303,841,540
<DIVIDEND-INCOME>                                             0
<INTEREST-INCOME>                                    13,998,056
<OTHER-INCOME>                                                0
<EXPENSES-NET>                                        1,320,927
<NET-INVESTMENT-INCOME>                              12,677,129
<REALIZED-GAINS-CURRENT>                              2,562,512
<APPREC-INCREASE-CURRENT>                             6,311,903
<NET-CHANGE-FROM-OPS>                                21,551,544
<EQUALIZATION>                                                0
<DISTRIBUTIONS-OF-INCOME>                            12,677,129
<DISTRIBUTIONS-OF-GAINS>                              2,454,652
<DISTRIBUTIONS-OTHER>                                         0
<NUMBER-OF-SHARES-SOLD>                              18,553,052
<NUMBER-OF-SHARES-REDEEMED>                           9,015,907
<SHARES-REINVESTED>                                   1,137,993
<NET-CHANGE-IN-ASSETS>                              111,010,249
<ACCUMULATED-NII-PRIOR>                               9,693,133
<ACCUMULATED-GAINS-PRIOR>                             2,344,182
<OVERDISTRIB-NII-PRIOR>                                       0
<OVERDIST-NET-GAINS-PRIOR>                                    0
<GROSS-ADVISORY-FEES>                                 1,311,664
<INTEREST-EXPENSE>                                            0
<GROSS-EXPENSE>                                       1,320,927
<AVERAGE-NET-ASSETS>                                233,808,662
<PER-SHARE-NAV-BEGIN>                                      9.68
<PER-SHARE-NII>                                            0.51
<PER-SHARE-GAIN-APPREC>                                    0.37
<PER-SHARE-DIVIDEND>                                       0.51
<PER-SHARE-DISTRIBUTIONS>                                  0.12
<RETURNS-OF-CAPITAL>                                       0.00
<PER-SHARE-NAV-END>                                        9.93
<EXPENSE-RATIO>                                            0.54
<AVG-DEBT-OUTSTANDING>                                        0
<AVG-DEBT-PER-SHARE>                                       0.00
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM THE ANNUAL
REPORT OF  AMERICAN  CENTURY  CALIFORNIA  TAX-FREE  AND  MUNICIPAL  FUNDS AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH REPORT.
</LEGEND>
<CIK> 0000717316
<NAME> AMERICAN CENTURY CALIFORNIA TAX-FREE & MUNICIPAL FUNDS
<SERIES>
   <NUMBER> 6
   <NAME> BENHAM CALIFORNIA INSURED FUND TAX-FREE
       
<S>                      <C>
<PERIOD-TYPE>                                      12-MOS
<FISCAL-YEAR-END>                                  AUG-31-1998
<PERIOD-END>                                       AUG-31-1998
<INVESTMENTS-AT-COST>                                 200,844,327
<INVESTMENTS-AT-VALUE>                                217,200,278
<RECEIVABLES>                                           2,887,560
<ASSETS-OTHER>                                          3,424,965
<OTHER-ITEMS-ASSETS>                                            0
<TOTAL-ASSETS>                                        223,512,803
<PAYABLE-FOR-SECURITIES>                                6,237,045
<SENIOR-LONG-TERM-DEBT>                                         0
<OTHER-ITEMS-LIABILITIES>                               1,766,541
<TOTAL-LIABILITIES>                                     8,003,586
<SENIOR-EQUITY>                                           203,258
<PAID-IN-CAPITAL-COMMON>                              198,268,322
<SHARES-COMMON-STOCK>                                  20,325,822
<SHARES-COMMON-PRIOR>                                  18,241,002
<ACCUMULATED-NII-CURRENT>                                       0
<OVERDISTRIBUTION-NII>                                          0
<ACCUMULATED-NET-GAINS>                                   681,686
<OVERDISTRIBUTION-GAINS>                                        0
<ACCUM-APPREC-OR-DEPREC>                               16,355,951
<NET-ASSETS>                                          215,509,217
<DIVIDEND-INCOME>                                               0
<INTEREST-INCOME>                                      10,968,312
<OTHER-INCOME>                                                  0
<EXPENSES-NET>                                          1,040,256
<NET-INVESTMENT-INCOME>                                 9,928,056
<REALIZED-GAINS-CURRENT>                                1,583,804
<APPREC-INCREASE-CURRENT>                               5,870,522
<NET-CHANGE-FROM-OPS>                                  17,382,382
<EQUALIZATION>                                                  0
<DISTRIBUTIONS-OF-INCOME>                               9,928,056
<DISTRIBUTIONS-OF-GAINS>                                2,921,262
<DISTRIBUTIONS-OTHER>                                           0
<NUMBER-OF-SHARES-SOLD>                                 7,856,824
<NUMBER-OF-SHARES-REDEEMED>                             6,627,802
<SHARES-REINVESTED>                                       855,798
<NET-CHANGE-IN-ASSETS>                                 26,364,509
<ACCUMULATED-NII-PRIOR>                                         0
<ACCUMULATED-GAINS-PRIOR>                               2,019,144
<OVERDISTRIB-NII-PRIOR>                                         0
<OVERDIST-NET-GAINS-PRIOR>                                      0
<GROSS-ADVISORY-FEES>                                   1,031,569
<INTEREST-EXPENSE>                                              0
<GROSS-EXPENSE>                                         1,040,256
<AVERAGE-NET-ASSETS>                                  197,726,150
<PER-SHARE-NAV-BEGIN>                                       10.37
<PER-SHARE-NII>                                              0.51
<PER-SHARE-GAIN-APPREC>                                      0.39
<PER-SHARE-DIVIDEND>                                         0.51
<PER-SHARE-DISTRIBUTIONS>                                    0.16
<RETURNS-OF-CAPITAL>                                         0.00
<PER-SHARE-NAV-END>                                         10.60
<EXPENSE-RATIO>                                              0.51
<AVG-DEBT-OUTSTANDING>                                          0
<AVG-DEBT-PER-SHARE>                                         0.00
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM THE ANNUAL
REPORT OF  AMERICAN  CENTURY  CALIFORNIA  TAX-FREE  AND  MUNICIPAL  FUNDS AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH REPORT.
</LEGEND>
<CIK> 0000717316
<NAME> AMERICAN CENTURY CALIFORNIA TAX-FREE & MUNICIPAL FUNDS
<SERIES>
   <NUMBER> 7
   <NAME> BENHAM CALIFORNIA LIMITED-TERM TAX-FREE
       
<S>                      <C>
<PERIOD-TYPE>                                       12-MOS
<FISCAL-YEAR-END>                                   AUG-31-1998
<PERIOD-END>                                        AUG-31-1998
<INVESTMENTS-AT-COST>                                   132,960,099
<INVESTMENTS-AT-VALUE>                                  135,798,378
<RECEIVABLES>                                             1,784,067
<ASSETS-OTHER>                                              119,932
<OTHER-ITEMS-ASSETS>                                              0
<TOTAL-ASSETS>                                          137,702,377
<PAYABLE-FOR-SECURITIES>                                  4,915,798
<SENIOR-LONG-TERM-DEBT>                                           0
<OTHER-ITEMS-LIABILITIES>                                 2,649,992
<TOTAL-LIABILITIES>                                       7,565,790
<SENIOR-EQUITY>                                             124,815
<PAID-IN-CAPITAL-COMMON>                                127,754,052
<SHARES-COMMON-STOCK>                                    12,481,523
<SHARES-COMMON-PRIOR>                                    12,292,606
<ACCUMULATED-NII-CURRENT>                                         0
<OVERDISTRIBUTION-NII>                                            0
<ACCUMULATED-NET-GAINS>                                   (580,559)
<OVERDISTRIBUTION-GAINS>                                          0
<ACCUM-APPREC-OR-DEPREC>                                  2,838,279
<NET-ASSETS>                                            130,136,587
<DIVIDEND-INCOME>                                                 0
<INTEREST-INCOME>                                         5,824,726
<OTHER-INCOME>                                                    0
<EXPENSES-NET>                                              664,135
<NET-INVESTMENT-INCOME>                                   5,610,591
<REALIZED-GAINS-CURRENT>                                    253,098
<APPREC-INCREASE-CURRENT>                                 1,302,650
<NET-CHANGE-FROM-OPS>                                     6,716,339
<EQUALIZATION>                                                    0
<DISTRIBUTIONS-OF-INCOME>                                 5,160,591
<DISTRIBUTIONS-OF-GAINS>                                          0
<DISTRIBUTIONS-OTHER>                                             0
<NUMBER-OF-SHARES-SOLD>                                   4,214,707
<NUMBER-OF-SHARES-REDEEMED>                               4,357,987
<SHARES-REINVESTED>                                         332,197
<NET-CHANGE-IN-ASSETS>                                    3,505,406
<ACCUMULATED-NII-PRIOR>                                   4,682,931
<ACCUMULATED-GAINS-PRIOR>                                   317,683
<OVERDISTRIB-NII-PRIOR>                                           0
<OVERDIST-NET-GAINS-PRIOR>                                        0
<GROSS-ADVISORY-FEES>                                       656,701
<INTEREST-EXPENSE>                                                0
<GROSS-EXPENSE>                                             664,135
<AVERAGE-NET-ASSETS>                                    126,543,906
<PER-SHARE-NAV-BEGIN>                                         10.30
<PER-SHARE-NII>                                                0.42
<PER-SHARE-GAIN-APPREC>                                        0.13
<PER-SHARE-DIVIDEND>                                           0.42
<PER-SHARE-DISTRIBUTIONS>                                      0.00
<RETURNS-OF-CAPITAL>                                           0.00
<PER-SHARE-NAV-END>                                           10.43
<EXPENSE-RATIO>                                                0.52
<AVG-DEBT-OUTSTANDING>                                            0
<AVG-DEBT-PER-SHARE>                                           0.00
        

</TABLE>


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