Jeffrey S. Hagen is Co-Managing Partner at Harper Meyer LLP. He focuses his practice on international tax and succession planning, primarily for high-net-worth individuals, multi-jurisdictional families, entities, and trust structures, providing custom advice narrowly tailored to meet each client’s specific circumstances and goals.
Mr. Hagen advises on the viability and effectiveness of cross-border transactions, tax residence and domicile matters, corporate structuring and inversions, U.S. income, gift, and estate tax and information reporting requirements, Foreign Investment in Real Property Tax Act of 1980 (FIRPTA) issues, income and estate tax treaties, and compliance matters relating to Common Reporting Standard (CRS) and Foreign Account Tax Compliance Act (FATCA).
Mr. Hagen was born and raised in Miami. He is an active member with both the International Law Section of the Florida Bar, where he serves on the Executive Board, and with Transnational Taxation Network, an organization of global international tax practitioners in over 20 jurisdictions.
Publications
- International Law Deskbook 2026, Author of Chapter 12: International Tax (pgs. 269-287) (March 2026)
- Hypothetical: Creative Solutions for an Interesting Client, The Florida Bar’s International Law Quarterly (ILQ) (Winter 2025)
- The Impact of the Corporate Transparency Act, TTN Member Insights (December 2022)
- Global Minimum Tax of 15%: Deal or No Deal?, The Florida Bar’s International Law Quarterly (ILQ) (Winter 2022)
- Digital Service Taxes – Breakthrough or Breaking Point?, The Florida Bar’s International Law Quarterly (ILQ) (Winter 2021)
- Transfer Pricing Challenges in 2020, The Florida Bar’s International Law Quarterly (ILQ) (Fall 2020)
- Taxation of Assets at Death: By Whom?, The Florida Bar’s International Law Quarterly (ILQ) (Spring 2020)
- IRS Publishes New Guidance for 2020 Income Tax Residency Due to COVID-19, International Law Section Gazette (April 2020)
- Economic Substance Requirements in the Caribbean: End of an Era?, The Florida Bar’s International Law Quarterly (ILQ) (Fall 2019)
Education
- LL.M. in Taxation, University of Florida Levin College of Law, 2016
- J.D., with honors, University of Florida Levin College of Law, 2015
- B.A., University of Michigan, 2012
Presentations and Panels
- U.S. Taxpayers Residing Abroad, Speaker (March 2026, Quito, Ecuador)
- U.S.-Brazil Tax Trends (2026), Speaker (March 2026, Miami, Florida)
- International Private Wealth: A Global View on Banking and Finance, Moderator, ILS Global Forum on International Law (February 2026, Miami, Florida)
- International Tax Updates, Speaker, Transnational Taxation Network (September 2025, Dublin, Ireland)
- Restitution of Nazi Looted Art & Tax Effects, Speaker, Transnational Tax Network (May 2024, Miami, Florida)
- U.S.-Brazil Tax Trends (2024), Speaker (March 2024, Miami, Florida)
- Marrying U.S. Tax and Immigration Planning, Speaker, Transnational Tax Network (September 2023, Paris, France)
- CTA – Update, Speaker, Transnational Tax Network (May 2023, Chicago, Illinois)
- Trusts and Estates in an International World, Panelist, ILS Global Forum on International Law (February 2023, Miami, Florida)
- Changing Global Beneficial Ownership Requirements, Moderator, ILS Global Forum on International Law (April 2022, Miami, Florida)
- Taxation of Cruise Lines, Visiting Professor, St. Thomas University School of Law (November 2021, Miami, Florida)
- Tax Tips for International Arbitration, Panelist, Florida Bar CLE (October 2020, Webinar)
- Impact of New Economic Substance Rules on International Transactions, Panelist, ILS Global Forum on International Law (February 2020, Miami, Florida)
- Economic Substance: Impact on Tax Structures, Speaker, Transnational Tax Network (September 2019, Malta)
- Comparative Tax Law, Panelist, ILS Conference on International Law in Panama (May 2019, Panama City, Panama)
- Aviation and Taxation: U.S. and International Law, Speaker, Transnational Tax Network (May 2019, Miami, Florida)
- Moving to the U.S.: Tax Law Considerations, Speaker, Transnational Tax Network (November 2018, Mexico City, Mexico)
- Recent Death of Non-U.S. Parent with U.S. Children – What Do We Do?, Speaker, Transnational Tax Network (May 2018, New York City, New York)
- Domestic Single Member LLCs and Related Foreign Party Transactions, Speaker, Transnational Tax Network (May, 2017, New York City, New York)
Memberships
- Treasurer, Executive Board, Florida Bar’s International Law Section
- Editor-in-Chief, Florida Bar’s International Law Quarterly (ILQ) (2022-2025)
- Chair, International Tax Committee, Florida Bar’s International Law Section
- Executive Committee, Publications Chair, Transnational Tax Network (TTN)
- Member, Tax Section of the Florida Bar
- Florida Bar, 2015
Services
- International Tax Planning
- International Estate Planning