Thorsteinssons LLP
Automatically compiled listing. Details may contain errors.67 lawyers · Established 1964 · City of Toronto, Metro Vancouver
One of 2,276 law firms listed in Toronto, and one of 66 handling Tax Law.
Virtual appointments
Virtual appointmentsAbout Thorsteinssons LLP
Thorsteinssons LLP is a Canadian law firm that practices exclusively in tax law, headquartered in Vancouver with a second office in Toronto. Paterson (Pat) Thorsteinsson, QC, one of the country's first tax lawyers, founded the firm in Vancouver in 1964 after returning to British Columbia. The firm describes itself as Canada's largest law firm working exclusively in tax law and its only national tax law firm, and it opened a Toronto office in 1990 to serve a growing base of clients across the country.
The firm's lawyers handle tax planning and corporate restructuring, tax litigation, international taxation, GST, HST and other sales taxes, customs and trade, and tax related criminal defence, along with estate planning and work for tax exempt organizations and investment funds. Thorsteinssons lawyers have appeared in landmark Supreme Court of Canada tax cases, including Canada v. Loblaw Financial Holdings Inc. and Canada v. Alta Energy Luxembourg S.A.R.L., both decided in 2021, as well as earlier cases such as Daishowa-Marubeni International Ltd. v. Canada.
Practice areas
In the community
- The firm publishes a tax law blog covering federal and provincial developments, including posts on the Canada Revenue Agency's audit powers and changes to Canadian sales tax rules such as HST, GST, and BC's provincial sales tax.
Good to know
Wheelchair accessible
Virtual appointments
By appointment
In-person servicesLawyers 67
Alexander Barnes
Associate
Tax Law
Alexander Demner
Partner
Tax Law
Alexei Paish
Associate
Tax Law
Asif Abdulla
Partner
Tax Law
Brandon Wiener
Partner
Brendan Forrest
Partner
Brent Pidborochynski
Partner
Tax Law
Brittany Rossler
Partner
Tax Law
Charlotte Tan
Associate
Tax Law
Chris Canning
Partner
Tax Law
Colin Smith
Partner
Tax Law
Daniel Sze
Associate
Tax Law
David Baxter
Partner
Tax Law
David Christian
Partner
Tax Law
David Davies
Partner
David Thompson
Partner
Tax Law
E. Rebecca Potter
Partner
Elizabeth Egberts
Associate
Tax Law
Elliott Simpson
Associate
Eryn Fanjoy
Partner
Tax Law
Florence Sauve
Partner
Genna Wood
Associate
Gloria Wang
Partner
Ian Gamble
Partner
This firm’s lawyers at a glance
- Called to the bar
- 1984–2020 · median 19 years in practice 15 of 67 lawyers
- Law schools
- University of British Columbia (9), University of Toronto (7), University of Ottawa (5), University of Victoria (4), Osgoode Hall Law School (3), Queen's University (3) and 8 more 43 of 67 lawyers
- Languages on the roster
- Cantonese, Chinese, English, French, Mandarin, Mandarin Chinese, Spanish
Who handles what
-
Tax Law
Alexander Barnes, Alexander Demner, Alexei Paish, Asif Abdulla, Brent Pidborochynski, Brittany Rossler, Charlotte Tan, Chris Canning, Colin Smith, Daniel Sze, David Baxter, David Christian, David Thompson, Elizabeth Egberts, Eryn Fanjoy, Ian Humphries, Jeanne Chiang, Jenna Himelfarb, Jennifer Flood, Jill Swanston, John Gregory, Joseph Kuta, Juliana Orlando Rohr, Kate Amirault, Kate Lawlor, Ken Jiang, Kimberley Cook, Michael McLaren, Morgan Watchorn, Natasha Kisilevsky, Noah Sarna, Rick Wong, Sam Lewis, Shawn Tryon, Ted Sutcliffe, Terry Barnett, Trent Abraham, Tyler Berg, Zheting Su
Offices 2
PO Box 786, 33rd Floor, Brookfield Place, Bay Wellington Tower, 181 Bay St., Toronto, ON M5J 2T3
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Tax LawThis listing was generated by AI from public sources in September 2026. It may contain errors, and we can’t guarantee it’s accurate or complete. Before you rely on anything here, verify it on the firm’s own website. Verify licence status in the Law Society of Ontario directory ↗
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