Structure of the Office of Tax Policy


Michael Mundaca

Michael Mundaca

Ernst & Young’s co-leader of the National Tax Department and Americas Tax Center, Michael Mundaca, served at the U.S. Treasury Department under the administration of Bill Clinton, George W. Bush, and Barack Obama. During his most recent period with the Treasury Department, Michael Mundaca was the Assistant Secretary of the Treasury for Tax Policy.

The Treasury Department’s Office of Tax Policy establishes tax policy for the administration, working closely with the Internal Revenue Service to publish tax regulations and other guidance, and working closely with Congress on tax legislative proposals. The office also represents the Unites States in international forums, such as the Organisation for Economic Cooperation and Development, on tax policy matters, and negotiates tax treaties on behalf of the United States. The office also produces estimates of the effects of tax policies as well as of government receipts generally. The work of the office also includes issues regarding pension reform and some trade and customs matters.


The Role of the Office of Tax Policy

Office of Tax Policy pic

Office of Tax Policy

Michael Mundaca is co-director of the National Tax Department and the Americas Tax Center at Ernst & Young. Before that, Michael Mundaca served as the assistant secretary for tax policy at the U.S. Treasury Department.

The Treasury Department’s Office of Tax Policy develops and implements tax programs and policies and provides estimates for government receipts for the president’s fiscal policy decisions, budget, and U.S. Treasury cash management decisions. Also working at the international level, the office negotiates U.S. tax treaties and represents the country in meetings and in the efforts of multilateral organizations that handle tax policy matters, such as the Organisation for Economic Cooperation and Development.

The assistant treasury secretary for tax policy and his or her deputies get advice from, and oversee the activities of, those in Tax Policy’s Office of the International Tax Counsel, the Office of the Tax Legislative Counsel, the Office of Tax Analysis, and the Office of the Benefits Tax Counsel.

To learn more about the Office of Tax Policy, visit