<PAGE>
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   FORM 10-K/A
                                 AMENDMENT NO. 1


(MARK ONE)

[X]      ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2004 OR

[ ]      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934 (NO FEE REQUIRED) FOR THE TRANSITION PERIOD FROM
         __________ TO __________

                         COMMISSION FILE NUMBER 0-25033

                              THE BANC CORPORATION
             (Exact Name of Registrant as Specified in Its Charter)

                  DELAWARE                             63-1201350
       (State or Other Jurisdiction of               (I.R.S. Employer
        Incorporation or Organization)              Identification No.)

                17 NORTH 20TH STREET                     35203
                BIRMINGHAM, ALABAMA                    (Zip Code)
      (Address of Principal Executive Offices)

                                 (205) 327-3600
              (Registrant's Telephone Number, Including Area Code)

        SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT: NONE
           SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT:

                     COMMON STOCK, PAR VALUE $.001 PER SHARE
                                (Titles of Class)

         Indicate by check mark whether the registrant: (1) has filed all
reports required to be filed by Section 13 or 15(d) of the Securities Exchange
Act of 1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes [X] No [ ]

         Indicate by check mark if disclosure of delinquent files pursuant to
Item 405 of Regulation S-K is not contained herein, and will not be contained,
to the best of registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K. [ ]

         Indicate by check mark whether the registrant is an accelerated filer
(as defined in Exchange Act Rule 12b-2). Yes [X] No [ ]

         The aggregate market value of the voting common stock held by
non-affiliates of the registrant as of March 11, 2005, based on a closing price
of $10.97 per share of Common Stock, was $205,646,988.

         Indicate the number of shares outstanding of each of the registrant's
classes of common stock as of the latest practicable date: the number of shares
outstanding as of March 3, 2005, of the registrant's only issued and outstanding
class of common stock, its $.001 per share par value common stock, was
18,746,307.

                       DOCUMENTS INCORPORATED BY REFERENCE

         The information set forth under Items 10, 11, 12, 13 and 14 of Part III
of this Report is incorporated by reference from the registrant's definitive
proxy statement for its 2005 annual meeting of stockholders that will be filed
no later than April 30, 2005.
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                                EXPLANATORY NOTE


         We are filing this Amendment No. 1 on Form 10-K/A to our Annual Report
on Form 10-K for the fiscal year ended December 31, 2004 to correct the caption
on Exhibit (23)-1, which is refiled with this Amendment No. 1. As required by
Rule 12b-15 under the Securities Exchange Act of 1934, we are also filing
currently dated certifications of our Chief Executive Officer and Chief
Financial Officer. No other information in our Annual Report on Form 10-K is
amended or updated by this Amendment No. 1.


                                       2
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                                     PART IV

ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES.


(b)      Exhibits

         The exhibits required by Regulation S-K are set forth in the following
list and are filed by attachment to this Annual Report on Form 10-K as indicated
below.

<TABLE>

<S>               <C>
(23)  - 1         Consent of Carr, Riggs & Ingram, LLC

(31)              Certifications of Chief Executive Officer and Chief Financial
                  Officer pursuant to Rule 13a-14(a).

(32)              Certifications of Chief Executive Officer and Chief Financial
                  Officer pursuant to 18 U.S.C. Section 1350.
</TABLE>


                                       3
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                                   SIGNATURES

         Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this Amendment No. 1 on
Form 10-K/A to Annual Report on Form 10-K to be signed on its behalf by the
undersigned, thereunto duly authorized.



                                        THE BANC CORPORATION



                                        By   /s/David R. Carter
                                           ------------------------------
                                             David R. Carter
                                             Executive Vice President and
                                             Chief Financial Officer

March 17, 2005



         Pursuant to the requirements of the Securities Exchange Act of 1934,
this report has been signed below by the following persons on behalf of the
Registrant and in the capacities and on the date indicated.


<TABLE>
<CAPTION>
                  SIGNATURE                                        TITLE                              DATE
                  ---------                         ----------------------------------          ---------------
<S>                                                  <C>                                         <C>
                      *                                   Chief Executive Officer
--------------------------------------------           (Principal Executive Officer)             March 17, 2005
              C. Stanley Bailey

                                                         Executive Vice President,
                                                        Chief Financial Officer and
             /s/David R. Carter                      Director (Principal Financial and
--------------------------------------------                Accounting Officer)
               David R. Carter                                                                   March 17, 2005

                      *
--------------------------------------------
               James A. Taylor                             Chairman of the Board                 March 17, 2005

                      *
--------------------------------------------
           James Mailon Kent, Jr.                              Vice Chairman                     March 17, 2005

                      *
--------------------------------------------
           Larry D. Striplin, Jr.                              Vice Chairman                     March 17, 2005

                      *
--------------------------------------------
               K. Earl Durden                                  Vice Chairman                     March 17, 2005

                      *
--------------------------------------------
           James R. Andrews, M.D.                                Director                        March 17, 2005
</TABLE>


                                       4
<PAGE>

<TABLE>
<S>                                                  <C>                                         <C>
                      *
--------------------------------------------
                Roger Barker                                     Director                        March 17, 2005

                      *
--------------------------------------------
             W. T. Campbell, Jr.                                 Director                        March 17, 2005

                      *
--------------------------------------------
           Thomas E. Jernigan, Jr.                               Director                        March 17, 2005

                      *
--------------------------------------------
              Randall E. Jones                                   Director                        March 17, 2005

                      *
--------------------------------------------
            Ronald W. Orso, M.D.                                 Director                        March 17, 2005

                      *
--------------------------------------------
               Harold W. Ripps                                   Director                        March 17, 2005

                      *
--------------------------------------------
               Jerry M. Smith                                    Director                        March 17, 2005

                      *
--------------------------------------------
             Michael E. Stephens                                 Director                        March 17, 2005

                      *
--------------------------------------------
                 Marie Swift                                     Director                        March 17, 2005

                      *
--------------------------------------------
            James A. Taylor, Jr.                                 Director                        March 17, 2005



* By         /s/David R. Carter
    ----------------------------------------
         David R. Carter
         Attorney-in-Fact
</TABLE>



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