EXHIBIT 32.1

           CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED
            PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

      The undersigned hereby certify that the Annual Report on Form 10-K for the
year ended September 29, 2006 filed by TD AMERITRADE Holding Corporation with
the Securities and Exchange Commission fully complies with the requirements of
Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that
information contained in the report fairly presents, in all material respects,
the financial condition and results of operations of TD AMERITRADE Holding
Corporation.

Dated:  December 7, 2006                    /s/ JOSEPH H. MOGLIA
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                                            Joseph H. Moglia
                                            Chief Executive Officer

Dated:  December 7, 2006                    /s/ WILLIAM J. GERBER
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                                            William J. Gerber
                                            Senior Vice President,
                                            Chief Financial Officer