Mike Fonseca

International tax Partner

US Tax Inbound Leader

Mike Fonseca

Brickell World Plaza 600 Brickell Avenue

Suite 3700



United States


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Miguel (Mike) A. Fonseca is a tax partner based out of Miami, Florida. Mike has more than 25 years of experience assisting clients as LCSP, LTP, and/or international tax specialist. Mike is the inbound tax leader for the US firm and has served on the US inbound steering committee nationally since its inception and serves as the Florida inbound leader to help deliver and coordinate the tax needs of non-US multinationals investing in the US. He also has significant experience assisting US multinationals with their international investments.

Mike currently serves on Deloitte Tax’s national partner, principal, and managing director due diligence committee and has served on the nominating committee. Mike served as America’s tax and legal leader for Deloitte from 2011 through FYE 2019. Mike also served as a member of Deloitte’s Global Tax and Legal Executive team from 2015 through FYE 2019. He has extensive experience in providing tax compliance, advisory, and provision services as well as advising clients in structuring cross border transactions and assisting with tax diligence on cross border mergers and acquisitions.

Mike has extensive experience serving multinational clients as they structure and maintain their cross border investments. He has broad experience working on cross border acquisitions, operations, and business expansions. Mike has assisted large US and non-US multinationals with their tax provisions, transfer pricing, global tax compliance, and structuring their operations efficiently on a global basis. Mike has served clients across a broad range of industries. Mike is fluent in Spanish.

Mike earned his Bachelor of Arts degree with a major in accounting from Furman University and he earned his Masters of Science degree in taxation from the University of Miami in Coral Gables, Florida. Mike is a Certified Public Accountant and is a member of the American Institute of Certified Public Accountants.

Mike Fonseca