Company lists · Data refreshed September 2026

Top 25 Expat tax law firms based in Canada

Name: Expat tax law firms based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 200 companies tracked

RevenueBase identified 200 expat tax law firms headquartered in Canada as of September 2026 and tracks 2,329 professional contacts across them, including 1,258 with verified work emails. Toronto is the largest hub.

This list covers expat tax law firms headquartered in Canada, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

200Companies

2,329Contacts tracked

1,258Verified emails

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The 25 largest expat tax law firms based in Canada

Ranked by team size

Top 25 of 200 expat tax law firms based in Canada, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to expat tax law firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Lavery	Partial evidence	Montréal, QC, CanadaHQ checked Sep 28, 2026	201-500	546 contacts →
	Partial evidence “Over a century of legal advice to domestic and international organizations has made Lavery Lawyers the leading independent law firm in Quebec (Canadian Lawyer).” Source: RevenueBase Database · checked Sep 28, 2026
2	Trowbridge Professional Corporation	Partial evidence	Toronto, ON, CanadaHQ checked Sep 28, 2026	51-200	161 contacts →
	Partial evidence “Trowbridge Professional Corporation is a long established global accounting firm that provides a wide range of personal and corporate tax services, specializing in international…” Source: RevenueBase Database · checked Sep 28, 2026
3	Marcil Lavallée	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	51-200	109 contacts →
	Indirect evidence “Marcil Lavallée est un partenaire engagé qui contribue activement à la réussite de ses clients en anticipant leurs besoins et en leur offrant une gamme complète de solutions…” Source: RevenueBase Database · checked Sep 28, 2026
4	Thorsteinssons TAX Lawyers	Strong evidence	Vancouver, BC, CanadaHQ checked Sep 28, 2026	51-200	106 contacts →
	Strong evidence “Thorsteinssons is the largest Canadian law firm practicing exclusively in Tax.” Source: RevenueBase Database · checked Sep 28, 2026
5	Moodys Private Client	Strong evidence	Calgary, AB, CanadaHQ checked Sep 28, 2026	11-50	89 contacts →
	Strong evidence “Moodys Private Client is the home of Moodys Tax Law, Moodys Private Client Law, and Moodys Private Client Accounting.” Source: RevenueBase Database · checked Sep 28, 2026
6	Kenway Mack Slusarchuk Stewart LLP	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 28, 2026	51-200	71 contacts →
	Indirect evidence “At KMSS we strive to provide an extraordinary experience.” Source: RevenueBase Database · checked Sep 28, 2026
7	Felesky Flynn LLP	Partial evidence	Edmonton, AB, CanadaHQ checked Sep 28, 2026	51-200	70 contacts →
	Partial evidence “With offices in Calgary, Edmonton and Saskatoon, Felesky Flynn LLP provides Canadian and international tax planning, tax representation and litigation, and wills and estates…” Source: RevenueBase Database · checked Sep 28, 2026
8	Cfla S.E.N.C.R.L. LLP	Indirect evidence	Brossard, QC, CanadaHQ checked Sep 28, 2026	51-200	51 contacts →
	Indirect evidence “Services * Expansion américaine et/ou internationale;* Conformité fiscale américaine (corporative);* Conformité fiscale américaine (individu);* « Snowbirds » et immobilier…” Source: RevenueBase Database · checked Sep 28, 2026
9	Segev LLP	Partial evidence	Vancouver, BC, CanadaHQ checked Sep 28, 2026	11-50	43 contacts →
	Partial evidence “Segev LLP is a international law firm headquartered in Vancouver, Canada.” Source: RevenueBase Database · checked Sep 28, 2026
10	Legacy TAX Trust Lawyers	Strong evidence	Vancouver, BC, CanadaHQ checked Sep 28, 2026	11-50	43 contacts →
	Strong evidence “Legacy Tax + Trust Lawyers is a dynamic boutique law firm in the heart of downtown Vancouver.” Source: RevenueBase Database · checked Sep 28, 2026
11	Cadesky TAX	Partial evidence	Toronto, ON, CanadaHQ checked Sep 28, 2026	11-50	41 contacts →
	Partial evidence “Cadesky Tax is an independent tax consulting firm.” Source: RevenueBase Database · checked Sep 28, 2026
12	Rosen & Associates TAX LAW	Strong evidence	Toronto, ON, CanadaHQ checked Sep 28, 2026	11-50	33 contacts →
	Strong evidence “Rosen & Associates Tax Law (“R&A Tax Law) is a national tax law firm based in Toronto, Ontario.” Source: RevenueBase Database · checked Sep 28, 2026
13	Diversico, Experts-Conseils	Indirect evidence	Brossard, QC, CanadaHQ checked Sep 28, 2026	51-200	31 contacts →
	Indirect evidence “Planification fiscale, financière et successorale” Source: RevenueBase Database · checked Sep 28, 2026
14	Westmark TAX	Partial evidence	Vancouver, BC, CanadaHQ checked Sep 28, 2026	11-50	26 contacts →
	Partial evidence “Our firm was founded to provide quality cross-border tax services based on the following 4 key principles: Effective tax planning We try to provide value for our fees whether we…” Source: RevenueBase Database · checked Sep 28, 2026
15	PWC LAW LLP	Partial evidence	Toronto, ON, CanadaHQ checked Sep 28, 2026	51-200	21 contacts →
	Partial evidence “As part of a larger network of over 2,500 lawyers across more than 85 countries, PwC Law LLP has offices and lawyers in Toronto, Montreal, Vancouver and Calgary.” Source: RevenueBase Database · checked Sep 28, 2026
16	Levy Salis LLP	Partial evidence	Montréal, QC, CanadaHQ checked Sep 28, 2026	1-10	18 contacts →
	Partial evidence “With more than 25 years of combined experience, we are proud at Levy Salis LLP to provide our clients with tailored services to meet their Canadian, US and Israeli tax and estate…” Source: RevenueBase Database · checked Sep 28, 2026
17	Ekitas Avocats & Fiscalistes INC	Indirect evidence	Laval, QC, CanadaHQ checked Sep 28, 2026	11-50	18 contacts →
	Indirect evidence “Bureau d’avocats et avocats-fiscalistes spécialisés en droit des affaires, planification fiscale et successorale ainsi qu’en litige civil et commercial.” Source: RevenueBase Database · checked Sep 28, 2026
18	Taxpayer LAW	Strong evidence	Toronto, ON, CanadaHQ checked Sep 28, 2026	11-50	15 contacts →
	Strong evidence “Taxpayer Law \| Tax Litigation & Dispute Resolution For inquiries, contact igor@taxpayer.law or visit At Taxpayer Law, we focus exclusively on tax litigation and dispute resolution.” Source: RevenueBase Database · checked Sep 28, 2026
19	Pellerin Aubert Ramsay Provencher INC	Indirect evidence	Victoriaville, QC, CanadaHQ checked Sep 28, 2026	51-200	15 contacts →
	Indirect evidence “Pellerin Aubert Ramsay Provencher inc, fondé en 1980, a son siège social à Victoriaville.” Source: RevenueBase Database · checked Sep 28, 2026
20	Affilia Legal	Partial evidence	Montreal, QC, CanadaHQ checked Sep 28, 2026	1-10	14 contacts →
	Partial evidence “A renowned firm specializing in business law and international trade, Affilia Legal LLP, comprehensively addresses the legal service needs of internationally oriented businesses.” Source: RevenueBase Database · checked Sep 28, 2026
21	Barsalou Lawson Rheault LLP	Strong evidence	Montréal, QC, CanadaHQ checked Sep 28, 2026	11-50	14 contacts →
	Strong evidence “Barsalou Lawson Rheault is recognized as one of Canada’s leading tax law firms.” Source: RevenueBase Database · checked Sep 28, 2026
22	Strategic TAX & Business Solutions INC	Partial evidence	Calgary, AB, CanadaHQ checked Sep 28, 2026	1-10	14 contacts →
	Partial evidence “Firm Profile Founded in Strategic Tax & Business Solutions Inc.(STBS) quickly earned a reputation for providing our clients with outstanding customer service as well as providing…” Source: RevenueBase Database · checked Sep 28, 2026
23	O'sullivan Estate Lawyers LLP	Partial evidence	Toronto, ON, CanadaHQ checked Sep 28, 2026	11-50	13 contacts →
	Partial evidence “O'Sullivan Estate Lawyers is a boutique law firm located in Toronto, Canada with a focus on multi-jurisdictional, cross-border and domestic trusts and estates matters.” Source: RevenueBase Database · checked Sep 28, 2026
24	Summit Strategies Chartered Professional Accountants	Indirect evidence	Red Deer, AB, CanadaHQ checked Sep 28, 2026	11-50	13 contacts →
	Indirect evidence “Summit Strategies is a well rounded multi-disciplinary firm of professionals.” Source: RevenueBase Database · checked Sep 28, 2026
25	Martel Cantin	Indirect evidence	Montréal, QC, CanadaHQ checked Sep 28, 2026	11-50	13 contacts →
	Indirect evidence “Depuis plus de 50 ans, l'offre de Martel Cantin est simple: un accompagnement empathique et stratégique.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: expat tax law firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names expat tax law firms.
Partial evidence: Its own public description names part of expat tax law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name expat tax law firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 200 expat tax law firms based in Canada

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Expat tax law firms based in Canada at a glance

As of Sep 28, 2026

54.0%Verified-email coverage

11.6Average contacts per company

1-10Median size (employees)

14.5%Largest-city concentration · Toronto

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

133

11-50

51-200

201-500

501-1,000

Email recency for this list is measured worldwide rather than for Canada, so it is reported there. Company counts and contact totals on this page are exact for Canada, over 200 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among expat tax law firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Canada whose own description of what they do matches “expat tax law firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names expat tax law firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among expat tax law firms, and records with no verified work email. Companies headquartered outside Canada are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 1,258 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Expat tax law firms by metro

Expat tax law firms in Toronto29

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names expat tax law firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many expat tax law firms are there based in Canada?

RevenueBase identified 200 expat tax law firms headquartered in Canada as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Lavery, headquartered in Montreal, tops this list with the largest team on record.

Which city has the most expat tax law firms?

Toronto leads with 29 headquartered companies, followed by Montreal (22) and Vancouver (19).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,258 verified decision-maker contacts tracked across these 200 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.