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


Trump Administration Tax Plan on the Government Agenda


Trump Administration Tax Plan

A principal in Ernst & Young, LLP, working in Washington, D.C., and a co-leader of EY’s Americas Tax Center and its National Tax Department, Michael Mundaca draws on past experience with the U.S. Treasury Department as assistant secretary for tax policy. Michael Mundaca’s work as co-leader involves coordination with professionals across the Americas in facilitating tax services.

As featured in a recent EY Americas Tax Center Global Tax Alert, one topic of current focus is a tax reform plan presented by the Trump Administration that proposes a tax rate of 15 percent for businesses. As part of the plan roll-out, Treasury Secretary Steven Mnuchin announced that the administration would negotiate with Congress on the rate for a one-time tax that would be assessed on US corporations’ unrepatriatied foreign earnings, as a transition to a territorial tax system for foreign business earnings.

Other proposed changes include a repeal of individual tax deductions other than those associated with charitable contributions and mortgage interest. The estate tax and alternative minimum tax would be repealed, as would be the net investment income tax, which went into law as part of the Affordable Care Act.