Jeffrey C. Trossman Senior Counsel | Toronto

About Jeffrey

Jeffrey serves as Senior Counsel in the top-tier Blakes Tax group, having previously led the group as National Practice Group Leader for over 15 years.

Over his career, Jeffrey has provided strategic advice on domestic and cross-border transactions and assisted a wide range of clients in managing tax audits and resolving tax disputes. Jeffrey has written and spoken widely on tax law and practice, and more recently on tax reform topics. He is a past chair of the National Taxation Section of the Canadian Bar Association and a past co-chair of the Joint Committee on Taxation of the Canadian Bar Association and Chartered Professional Accountants of Canada. He serves as an advisor to the Board of Governors of the Canadian Tax Foundation and as editor of the publication Perspectives on Tax Law & Policy. Jeffrey is also co-chair of the Fiscal & Tax Competitiveness Council of the C.D. Howe Institute. He interacts frequently with senior governmental officials in connection with current and proposed tax legislation and administration.

Awards & Recognition

Jeffrey has been recognized as a leading tax practitioner in the following publications:

Chambers Canada: Canada's Leading Lawyers for Business 2025 (Tax)
The Best Lawyers in Canada 2025 (Tax Law)
Lexpert Special Edition: Insolvency and Restructuring 2024
Lexpert Special Edition: Finance and M&A 2024
Who's Who Legal: Thought Leaders – Global Elite 2024 (Corporate Tax – Advisory)
The Canadian Legal Lexpert Directory 2024 (Corporate Tax)
Chambers Global: The World's Leading Lawyers for Business 2024 (Tax)
Who's Who Legal: Canada 2023 (Corporate Tax)
Who's Who Legal: Global 2023 (Corporate Tax – Controversy)
The 2023 Lexpert/American Lawyer Guide to the Leading 500 Lawyers in Canada (Corporate Tax)
The Legal 500 Canada 2023 (Tax)

Professional Activities

Jeffrey previously served as chair of the National Taxation Section of the Canadian Bar Association, and co-chair of the Joint Committee on Taxation of the Canadian Bar Association and Chartered Professional Accountants of Canada. He is also co-chair of the Fiscal and Tax Competitiveness Council of the C.D. Howe Institute, an advisor to the Board of Governors of the Canadian Tax Foundation, and the editor of the publication Perspectives on Tax Law & Policy. From 2015 to 2023 he co-chaired the Senior Tax Practitioner's Institute, an invitation-only meeting of the leading senior tax practitioners in Canada, held annually in Cambridge, Ontario.

Jeffrey writes, teaches and speaks frequently for several organizations, including the Canadian Tax Foundation, the International Fiscal Association, the Canadian Bar Association, the Ontario Bar Association, the University of Toronto and Osgoode Hall Law School.

Professional Appearances

Moderator : Tax & Technology
The Canadian Tax Foundation, Toronto Young Practitioners Group Meeting, Toronto, Ontario, June 13, 2024.
Speaker : Interest Deductibility
The Canadian Bar Association, 2024 Tax Law for Lawyers Conference, Niagara-on-the-Lake, Ontario, May 26 –31, 2024.
Panellist : The General Anti-Avoidance Rule
Faculty of Law – University of Toronto, Toronto, Ontario, April 4, 2024.
Co-chair : 36th Annual Senior Tax Practitioners' Institute
Prince of Wales Hotel, Niagara-on-the-Lake, Ontario, November 2-3, 2023.
Faculty Member : Deeper into the Knight: Exploring Deans Knight Income Corp. v. Canada and its Effects on the GAAR
Osgoode Hall Law School Professional Development, Toronto, Ontario, June 28, 2023.
Presenter : Responsible Tax Policies to Promote Investment
C.D. Howe Institute, Tax Reform Conference, Toronto, Ontario, June 15, 2023.
Presenter : Personal Taxation of Capital Gains and Investment Income: Policy Options
C.D. Howe Institute, Tax Reform Conference, Toronto, Ontario, June 14, 2023.
Speaker : Interest Deductibility
The Canadian Bar Association, 2023 Tax Law for Lawyers Conference, Niagara-on-the-Lake, Ontario, May 28 – June 2, 2023.
Speaker : Surplus Stripping – Key Principles and Tax Policy
Faculty of Law – University of Toronto, Toronto, Ontario, February 16, 2023.
Speaker : The James Hausman Tax Law and Policy Workshop
Faculty of Law – University of Toronto, Toronto, Ontario, January 11, 2023.
Co-chair : 35th Annual Senior Tax Practitioners' Institute
Langdon Hall, Cambridge, Ontario, October 27-28, 2022.
Speaker : Translating Model Rules: Scope & Computation
Canadian Tax Foundation, Pillar Two Symposium, Ottawa, Ontario, July 27, 2022.
Chair : 2022 Lex Mundi Tax Practice Group Global Meeting
Milan, Italy, June 19-20, 2022.