Olivier Custeau

Director of Canadian and U.S. Taxation, B.B.A., M. Fisc., EA

Holder of a bachelor’s degree in Business Administration (B.B.A.) from Université Laval and a master’s degree in Taxation (M. Fisc.) from the Université de Sherbrooke, Olivier Custeau has built strong expertise in U.S. and international taxation through his experience in a renowned professional firm.

Over the years, Olivier has developed a deep interest in U.S. tax law. He earned the designation of Enrolled Agent (EA) in 2019 — the highest credential granted by the Internal Revenue Service (IRS) for professionals authorized to represent taxpayers before the agency.

Known for his rigorous, dynamic, and human approach, Olivier plays a key role within the Effisca team, contributing to the firm’s cross-border expertise and client success.

Areas of Specialization

U.S. taxation (compliance and advisory)
Renunciation of U.S. citizenship
Canadian emigration and cross-border tax planning
Foreign tax credit calculations
Rental income of non-residents (Section 216) and certificates of disposition (T2062)
International income reported in Canada

Olivier, in a few words

When you were a child, you wanted to become…
Firefighter

When you wake up in the morning, the first thing that you do:
I take my son in my arms

If you could have superpower for a day, what would it be?
I would read people’s mind

The person you admire the most:
My mother

If you had one last meal, what would it be?
Raclette