Osler’s Tax Group is consistently recognized as a leading provider of tax law services in Canada and is ranked Band 1 by Chambers Canada, one of the leading legal directories in the world. From our offices across Canada, our tax lawyers operate as an integrated unit and in partnership with our clients to develop sophisticated solutions to our clients’ most complex and important taxation issues.
With close to 60 tax professionals, we offer our clients expert advice on a broad range of tax matters of importance to their business interests. In addition, we are pleased to share with our clients and others the benefit of our extensive experience through our Osler Updates, seminars, webinars and other client tailored programs.
Osler is a long-time sponsor of the Canadian Tax Foundation (CTF), the International Fiscal Association (IFA) and the Tax Executives Institute (TEI) in support of the professional needs of the in-house tax community and as leading sources of insight on Canadian corporate tax issues.
Key Contacts
Co-Chair
Partner, Tax, Toronto
Co-Chair
Partner, Tax, Calgary, Vancouver
Partner, Tax, Montréal
Partner, Tax, Vancouver
Latest Insights
-
Report December 4, 2025
Search funds in Canada: navigating cross-border challenges
Read how a Canadian-oriented approach may help reduce the tax inefficiencies inherent in structuring funds based on the U.S. model.
Read more
-
Report December 4, 2025
The rise of the machines: agentic AI
The rise of LLMs and the innovation they unlock means 2026 will be the year of agentic AI.
Read more -
Webinar November 26, 2025
Q4 Economic Outlook with Stephen Poloz
Will Canadians face tighter fiscal choices through 2026 as policymakers prioritize a more resilient and independent economy?
Read more -
Osler Update November 11, 2025
Canada Revenue Agency sets out new policy for GST/HST-related voluntary disclosure
We review the key changes from the previous version of the policy and how it could affect taxpayers.
Read more
Stay up to date with our latest insights
SubscribeRelated Content
Canadian Tax Law Insights Webinar Series
Osler’s leading tax team provides in-depth analysis of current tax issues and how they may impact your business.
Explore series
Awards and Recognition
-
Recognized in Tax (Band 1).
—Chambers Canada: Canada's Leading Lawyers for Business -
Recognized in Tax (Band 1).
—Chambers Global: The World's Leading Lawyers for Business -
Tax Law (Tier 1).
—The Legal 500 -
Osler earns Tier 1 ranking in Tax, Tax Controversy and Transactional Tax.
—International Tax Review: World Tax Guide
-
Osler wins Canada Tax Firm of the Year (2021), Canada Tax Firm of the Year and Americas Tax Innovator of the Year Awards (2020), Canada Tax Court Firm of the Year Award (2019).
—International Tax Review: Americas Tax Awards -
Osler’s Tax group is ranked Tier 1 and lawyers recognized as leaders in Transfer Pricing.
—International Tax Review, World Transfer Pricing Guide -
Osler lawyers recognized in Corporate Tax.
—Who’s Who Legal -
Recognized as “Law Firm of the Year” in Tax Law.
—Best Law Firms - Canada
In the Media
-
Osler News November 14, 2025
Osler recognized as a Tier 1 firm in ITR’s World Tax 2026
Osler is proud to be recognized by International Tax Review for its leading national Tax and Tax Controversy practice in the 2026 edition...
Read more -
Osler News October 28, 2025
Osler’s Tax Group earns top honours at ITR Americas Tax Awards 2025
Osler named Canada Tax Disputes Firm of the Year.
Read more -
Osler News October 1, 2025
Osler lawyers recognized in Lexpert Special Edition: Restructuring and Insolvency 2025
Osler is proud to announce that 23 of our lawyers are recognized in the Lexpert Special Edition: Restructuring and Insolvency 2025. This prestigious...
Read more -
Osler News September 25, 2025
Osler receives top rankings in 2026 edition of Chambers Canada
Osler is proud to have once again been ranked as a leading law firm in the 2026 edition of Chambers Canada.
Read more
