Jonathan A. Sambur

Washington,  DC  U.S.A.
Phone202 263 3256

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Experience & Credentials

Practice Areas

  • Financial Services Regulatory & Enforcement
  • Investment Management
  • Tax
  • Tax Transactions & Consulting
Contact InfoTelephone: 202 263 3256
Fax: 202 263 3300
University Brandeis University, B.A., 1997
Law SchoolHofstra University School of Law, J.D., with distinction, 2000; New York University School of Law, LL.M., Taxation, 2001
Admitted2001, New York; 2001, Massachusetts; 2002, US Tax Court; 2005, District of Columbia

Jonathan Sambur is a partner in Mayer Brown's Washington DC Tax Transactions practice. Jon’s practice is focused on U.S. federal tax issues affecting U.S. businesses operating outside the United States as well as U.S. federal tax issues affecting foreign businesses and individuals operating in the United States, including planning, structuring/restructuring, deferral/subpart F, foreign tax credit, tax treaties, legislative and regulatory work, and related controversy matters.

Jon works very closely with our Financial Services, Regulatory & Enforcement practice by providing U.S. federal income tax advice to non-U.S. financial institutions and non-U.S. investment funds, including advice related to the information reporting and withholding tax rules contained in recently-enacted Chapter 4 of the Internal Revenue Code (FATCA) and U.S. withholding tax/qualified intermediary (QI) issues. Jon frequently speaks to industry groups and writes articles on U.S. tax issues affecting non-U.S. financial institutions.

Prior to joining Mayer Brown LLP, Jon was an attorney at the IRS Office of Associate Chief Counsel (International).


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Important Foreign Account Tax Compliance Act (FATCA) Development for Withholding Agents and Foreign Financial Institutions
Mark H. Leeds,Jonathan A. Sambur, April 4, 2014
Domestic payers of certain types of US-source income and foreign financial institutions (FFIs) must determine whether their payees and account holders are compliant with the Foreign Account Tax Compliance Act (FATCA) and, beginning later this year and continuing into future years, withhold up to...
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Office Information

Jonathan A. Sambur

1999 K Street, N.W.
WashingtonDC 20006-1101


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