Osler Hoskin & Harcourt


1 First Canadian Place
Toronto, Ontario, Canada
M5X 1B8

+1 416 362 2111

+1 416 862 6666

Osler is widely recognized as one of Canada's best law firms for tax. Our 60+ tax planning and tax controversy lawyers operate as an integrated team. Clients involved in complex tax litigation benefit from the specialized expertise of tax planning lawyers. Clients with sophisticated tax planning can leverage the unique perspective of tax litigators. This combination is unique to Osler and allows us to deliver unparalleled advice.

Osler's tax lawyers regularly act in Canada's most complex tax-related transactions. They are integral to the firm's M&A practice, developing innovative approaches and structures for Canadian and foreign multinationals. Lawyers in our pre-eminent tax controversy and litigation practice have argued a number of landmark cases in the Supreme Court of Canada, including successfully arguing the first GAAR case, and the first and only transfer pricing case heard by the Court. Osler is also a leader in transfer pricing dispute resolution and provincial GAAR litigation.
Through our New York office, Osler provides U.S. tax advice to Canadian clients with operations in the U.S., and U.S.-based clients with operations in Canada.
Osler is recognized for the breadth and depth of its expertise in business law and is consistently ranked as one of Canada's top law firms. We serve our clients through offices in Toronto, Montréal, Calgary, Vancouver, Ottawa and New York.