Marc Roy

Marc is an associate in the Montreal office and a member of the tax group. His practice is broad, including domestic and international tax planning, dispute resolution and litigation.  

Marc joined the firm as a summer student in 2014 and completed his articles with the firm in 2017 after serving as a law clerk at the Federal Court of Appeal for the Honourable Justice Johanne Trudel.

Prior to completing the joint Common Law and Civil Law Program at McGill University, he studied at Carleton University’ College of the Humanities with a major in religious studies. While studying at McGill, Marc served as Vice President, Academic of the Law Students’ Association.

Representative Work

Latest Insights

  • Osler Update Jun 21, 2022

    Supreme Court releases Collins Family Trust decision: Equitable remedies largely unavailable to correct tax mistakes

    Osler lawyers Adam Hirsh, Marc Roy and Evan Belfer provide their analysis of the Supreme Court of Canada’s decision in Collins Family Trust.

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  • Osler Update May 31, 2018

    Québec government introduces amendments to An Act respecting the Québec Sales Tax dealing with the digital economy and e-commerce previously announced in the 2018 Budget

    Pursuant to the amendments, non-resident suppliers and digital platforms could be required to register for the purposes of the QSTA and to be...

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Awards and Recognition

  • Spiegel Sohmer Taxation Scholarship (McGill University Faculty of Law, 2015).
  • Selma and Jak Almaleh Prize (McGill University Faculty of Law, 2015).

Speaking and Writing

Published Work

  • « Investissement Boeckh inc. c. Agence du revenu du Québec », Canadian Tax Foundation, Vol 23, No. 3, July 2023 (with Héléna Gagné and Yanni Stavrakis).
  • Proposed Transfer Pricing Ordering Rules, International Tax, Wolters Kluwer, No. 109, December 2019



McGill University, B.C.L./LL.B (2015) Carleton University, B. Humanities (2010)


  • English
  • French

Professional Affiliations

  • Canadian Tax Foundation