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Tax Tax

Our team develops sophisticated solutions to our clients’ most complex and important taxation issues.

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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.  

Areas of Focus

Charities and Not-for-Profit OrganizationsIndirect TaxInternational TaxPrivate Client TaxationTax Advisory ServicesTax DisputesTax LitigationTax: M&A, Reorganizations and Restructuring TransactionsTaxation in Capital MarketsTaxation in Private Equity and Investment FundsTransfer Pricing

Key Contacts

Co-Chair

Timothy Hughes

Partner, Tax, Toronto

Co-Chair

Edward Rowe

Partner, Tax, Calgary, Vancouver

Mark Brender

Partner, Tax, Montréal

David Jacyk

Partner, Tax, Vancouver

View all team members

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

They have an exceptionally strong team that works together seamlessly — their experience with tax and tax litigation is the best in Canada.

Chambers Global: The World's Leading Lawyers for Business

In the Media

  • Osler News May 4, 2026

    Olivier Fournier joins Osler’s National Tax Group as a tax litigation partner

    Olivier’s practice focuses on tax litigation and controversy, advising Canadian and international clients on complex tax audits and disputes both...

    Read more
  • Osler News April 15, 2026

    Lexpert Special Edition: Finance and M&A 2026 recognizes 51 Osler lawyers

    Congratulations to our lawyers recognized as leaders in the Lexpert Special Edition: Finance and M&A 2026.

    Read more
  • Media Mentions March 27, 2026

    Canada’s new transfer pricing law puts taxpayers ‘on notice’ – Bloomberg Law News

    Canada’s new transfer pricing law is certain to increase the scope and intensity of CRA audits and controversies, says Amanda Heale.

    Read more
  • Osler News March 17, 2026

    179 Osler lawyers and 33 practice areas recognized in the 2026 Canadian Legal Lexpert Directory

    Osler has been recognized as a market leader in the 2026 edition of The Canadian Legal Lexpert Directory.

    Read more
View all
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Osler is a leading business law firm practising internationally from offices across Canada and in New York. Our clients include industry and business leaders in all segments of the market and at various stages in the growth of their businesses. We have built our reputation on our commitment to our clients' success and the experience, expertise and collaborative approach for which we are recognized. We believe that our success is a reflection of our clients' success.