Osler, Hoskin & Harcourt LLP

International Tax Review is part of Legal Benchmarking Limited, 1-2 Paris Garden, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement


Osler, Hoskin & Harcourt LLP

Image Toronto

1 First Canadian Place

PO Box 50

Toronto, Ontario, Canada

M5X 1B8

Tel: +416 362 2111

Fax: +416 862 6666

www.osler.com

Ottawa

Suite 1500

50 O'Connor Street

Ottawa, Ontario, Canada

K1P 6L2

Tel: +613 235 7234

Fax: +613 235 2867

Montréal

1000 de La Gauchetière Street West

Suite 2100

Montréal, Québec, Canada

H3B 4W5

Tel: +514 904 8100

Fax: +514 904 8101

Calgary

Suite 1900

Toronto Dominion Square

333-7th Avenue S.W.

Calgary, Alberta, Canada

T2P 2Z1

Tel: +403 260 7000

Fax: +403 260 7024

New York

1221 Avenue of the Americas, 26th floor

New York, New York,  US

10020-1089

Tel: +212 867 5800

Fax: +212 867 5802

Osler, Hoskin & Harcourt LLP is one of Canada's top law firms for tax according to international and domestic research studies. It is ranked in the top-tier of leading firms and placed five lawyers as leading individuals in various categories including tax controversy, transfer pricing, capital markets, cross-border structuring and M&A. Other international and domestic surveys laud the group of 60 specialists. Our tax group plays an integral role in our M&A practice, often developing novel transaction structures. We are at the heart of most innovative international transactions, whether representing a Canadian multinational with worldwide interests, or the Canadian operation of an international parent. In both instances, tax strategy spans jurisdictions and needs to respond to global–and local–objectives. Our offices are located in Toronto, Montréal, Ottawa, Calgary and New York. Visit our web site at www.osler.com.

more across site & shared bottom lb ros

More from across our site

The big four firm is rightfully prioritising transparency and accountability as it seeks to rebuild from its scandal, but a glaring structural issue remains
A recent hiring flurry has taken the firm’s number of partner appointments this year to 121 and put it on track to hit 160 partner target early
The move brings specialist tax and litigation capability to EY as it seeks to close the gap on Baker McKenzie and Venezuela’s leading local firms
The industry’s response to AI requires an unfamiliar ingredient as firms battle to shape their futures
The ambitious big four challenger firm has also appointed ex-RSM partner Brad Ashton to build out its customs and global trade practice
The big four firm allegedly reviewed backdated documents and signed off on accounts that removed hundreds of millions of dollars of Abramovich’s assets
New Tier 1 entrants and an expanding cohort of established players indicate that law firms are becoming increasingly credible challengers in Europe's TP market
Awards
Leading firms and individuals gathered in Dubai to celebrate standout legal, dealmaking and tax work across the region
Tax authorities want more revenue, have better tools to find it and are increasingly willing to fight for it
Audifina, the sixth-largest firm of its kind in Lithuania, will bring a 90-strong team with offices in Vilnius and Kaunas to RSM’s international platform
Gift this article