<Page> EXHIBIT 99.906CERT CERTIFICATION Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 Name of Registrant: ING Mayflower Trust Date of Form N-CSR: October 31, 2003 The undersigned, the principal executive officer of the above named registrant (the "Fund"), hereby certifies that, with respect to the Form N-CSR referred to above, to the best of his knowledge and belief, after reasonable inquiry: 1. such Form N-CSR fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. the information contained in such Form N-CSR fairly presents, in all material respects, the financial condition and results of operations of the Fund. A signed original of this written statement required by Section 906 has been provided to ING Mayflower Trust and will be retained by ING Mayflower Trust and furnished to the Securities and Exchange Commission or its staff upon request. IN WITNESS WHEREOF, the undersigned has executed this Certification below, as of this 7th day of January, 2004. /s/ James M. Hennessy --------------------- James M. Hennessy <Page> Name of Registrant: ING Mayflower Trust Date of Form N-CSR: October 31, 2003 The undersigned, the principal financial officer of the above named registrant (the "Fund"), hereby certifies that, with respect to the Form N-CSR referred to above, to the best of his knowledge and belief, after reasonable inquiry: 1. such Form N-CSR fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. the information contained in such Form N-CSR fairly presents, in all material respects, the financial condition and results of operations of the Fund. A signed original of this written statement required by Section 906 has been provided to ING Mayflower Trust and will be retained by ING Mayflower Trust and furnished to the Securities and Exchange Commission or its staff upon request. IN WITNESS WHEREOF, the undersigned has executed this Certification below, as of this 7th day of January, 2004. /s/ Michael J. Roland --------------------- Michael J. Roland