Exhibit 15
August 2, 2006
Securities and Exchange Commission
100 F Street, N.E.
Washington, DC 20549
Commissioners:
We are aware that our report dated August 2, 2006 on our review of interim financial information of MasterCard Incorporated (the Company) for the three and six month periods ended June 30, 2006 and 2005 and included in the Companys quarterly report on Form 10-Q for the quarter ended June 30, 2006 is incorporated by reference in its Registration Statement on Form S-8 dated June 30, 2006.
Very truly yours,
/s/ PricewaterhouseCoopers LLP