EXHIBIT 32.2

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

In connection with the annual report of Wright Express Corporation (the
"Company") on Form 10-K for the period ending December 31, 2005 as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I,
Melissa D. Smith, Senior Vice President and Chief Financial Officer of the
Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

(1)   The Report 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 the Report fairly presents, in all material
      respects, the financial condition and results of operations of the
      Company.

/s/ Melissa D. Smith (formerly Goodwin)
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Melissa D. Smith
Senior Vice President and Chief Financial Officer
March 15, 2006