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  • LL.M., New York University School of Law, 2016
  • J.D., New York University School of Law, 2013, Executive Editor, Journal of Legislation and Public Policy
  • B.A., Washington University in St. Louis, 2010, with College Honors, Lambda Alpha Anthropology Honorary

Bar and Court Admissions

  • New York
  • District of Columbia

Government Experience

Judicial Intern, Honorable Roger W. Titus, U.S. District Court, District of Maryland

Intern, Civil Division, U.S. Attorney's Office, Southern District of New York

Arielle M. Borsos

Associate, Washington, D.C.
(202) 862-5097 | v-card | PDF

Arielle M. Borsos joined Caplin & Drysdale in 2013 as an Associate in the firm's Washington, D.C., office.


Ms. Borsos counsels individuals and corporations on matters involving inbound U.S. and outbound international tax and tax controversies.  Illustrations of her legal services, include:

  • represent individuals and companies at the examination and appeals stage with respect to both domestic and international tax issues;
  • advise U.S. citizens with offshore accounts concerning their U.S. tax obligations and various matters in the international enforcement arena, including offshore voluntary disclosure;
  • assist clients in sensitive civil tax examinations by the IRS where fraud or substantial penalty issues may arise; and
  • counsel clients on planning for pre-immigration and expatriation, with particular emphasis on efficiently structuring cross-border investments.

Professional Activities

  • Member, American Bar Association, Tax Section

Awards & Rankings

  • The American Lawyer's Global Legal Award, Global Dispute of the Year: Investigations, Swiss Tax Settlements, 2015

Recent Speaking Engagements

  • Moderator, The Gathering Storm: Grappling with the Impact of Restitution Orders on Civil Tax Litigation, 2018 ABA Section of Taxation May Meeting, May 11, 2018
  • Speaker, A Birdie and a Bogey: Taxation of Foreign Athletes and Two Very Different Cases Involving Professional Golfers, American Bar Association, The Day After Tax Day, April 16, 2015

Click here for a full list of speaking engagements.

Recent Publications

Click here for a full list of publications.