Company lists · Data refreshed September 2026

Top 25 Law firm tax services based in Canada

Name: Law firm tax services based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 1,273 companies tracked

RevenueBase identified 1,273 law firm tax services headquartered in Canada as of September 2026 and tracks 23,600 professional contacts across them, including 12,931 with verified work emails. Toronto is the largest hub.

This list covers law firm tax services 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

1,273Companies

23,600Contacts tracked

12,931Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest law firm tax services based in Canada

Ranked by team size

Top 25 of 1,273 law firm tax services 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 law firm tax services: 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	MNP	Partial evidence	Calgary, AB, CanadaHQ checked Sep 28, 2026	5,001-10,000	8,773 contacts →
	Partial evidence “MNP is a leading national accounting, tax and business consulting firm in Canada.” Source: RevenueBase Database · checked Sep 28, 2026
2	Mccarthy Tétrault	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 28, 2026	1,001-5,000	1,913 contacts →
	Indirect evidence “McCarthy Tétrault provides a broad range of legal services, advising on large and complex assignments for Canadian and international interests.” Source: RevenueBase Database · checked Sep 28, 2026
3	Blake, Cassels & Graydon LLP	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 28, 2026	1,001-5,000	1,555 contacts →
	Indirect evidence “At Blake, Cassels & Graydon LLP (Blakes), we serve a diverse national and international client base.” Source: RevenueBase Database · checked Sep 28, 2026
4	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
5	Dmcl Chartered Professional Accountants	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 28, 2026	201-500	316 contacts →
	Indirect evidence “DMCL LLP is a full-service accounting firm dedicated to helping you achieve and exceed your business goals, no matter how ambitious.” Source: RevenueBase Database · checked Sep 28, 2026
6	FBC Farm And Small Business TAX Consultants	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 28, 2026	201-500	260 contacts →
	Indirect evidence “For more than 70 years, our focus has always been to bring financial peace of mind to our Canadian business owners.” Source: RevenueBase Database · checked Sep 28, 2026
7	Harper Grey LLP	Partial evidence	Vancouver, BC, CanadaHQ checked Sep 28, 2026	51-200	223 contacts →
	Partial evidence “Founded in 1907, Harper Grey LLP is a leading Vancouver, BC based business and litigation law firm.” Source: RevenueBase Database · checked Sep 28, 2026
8	Fuller Landau LLP	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 28, 2026	51-200	192 contacts →
	Indirect evidence “Work together with people excited by your goals and eager to address your unique business needs.” Source: RevenueBase Database · checked Sep 28, 2026
9	BVA	Indirect evidence	Sainte-marie, QC, CanadaHQ checked Sep 28, 2026	201-500	170 contacts →
	Indirect evidence “Depuis maintenant plus de 60 ans, BVA a développé une panoplie de services axés sur les préoccupations des entrepreneurs, des professionnels et des dirigeants d’entreprises.” Source: RevenueBase Database · checked Sep 28, 2026
10	Zeifmans	Partial evidence	Toronto, ON, CanadaHQ checked Sep 28, 2026	51-200	168 contacts →
	Partial evidence “Zeifmans is a full-service tax, accounting and consulting firm based in Toronto, Canada.” Source: RevenueBase Database · checked Sep 28, 2026
11	Spiegel Ryan LLP	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 28, 2026	51-200	164 contacts →
	Indirect evidence “We do the heavy lifting.” Source: RevenueBase Database · checked Sep 28, 2026
12	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
13	Taylor Mccaffrey LLP	Partial evidence	Winnipeg, MB, CanadaHQ checked Sep 28, 2026	51-200	154 contacts →
	Partial evidence “Taylor McCaffrey LLP is one of Manitoba's leading law firms.” Source: RevenueBase Database · checked Sep 28, 2026
14	Richards Buell Sutton LLP	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 28, 2026	51-200	129 contacts →
	Indirect evidence “BC's oldest firm with a history of over 150 years of delivering practical, quality, and cost-effective legal services to the community since 1871.” Source: RevenueBase Database · checked Sep 28, 2026
15	Davis Martindale LLP	Indirect evidence	London, ON, CanadaHQ checked Sep 28, 2026	51-200	122 contacts →
	Indirect evidence “At Davis Martindale, our accountants work to bring you the peace of mind you’re in search of with a touch of personality.” Source: RevenueBase Database · checked Sep 28, 2026
16	LJT Avocats Lawyers	Partial evidence	Montréal, QC, CanadaHQ checked Sep 28, 2026	51-200	122 contacts →
	Partial evidence “LJT is a boutique law firm serving its business clients for more than 30 years in the following fields of practice: Business Law, Taxation, Real Estate, Advertising and…” Source: RevenueBase Database · checked Sep 28, 2026
17	Fillmore Riley LLP	Partial evidence	Winnipeg, MB, CanadaHQ checked Sep 28, 2026	51-200	111 contacts →
	Partial evidence “Fillmore Riley is a highly regarded and accomplished full-service Manitoba law firm.” Source: RevenueBase Database · checked Sep 28, 2026
18	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
19	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
20	Melo LLP	Indirect evidence	Leamington, ON, CanadaHQ checked Sep 28, 2026	51-200	103 contacts →
	Indirect evidence “With a deep affinity for progress and bold entrepreneurialism, Melo LLP is an integrated, multidisciplinary team committed to driving business sustainability and growth.” Source: RevenueBase Database · checked Sep 28, 2026
21	Kelly Santini LLP	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	51-200	99 contacts →
	Indirect evidence “Every client.” Source: RevenueBase Database · checked Sep 28, 2026
22	SB Partners	Indirect evidence	Burlington, ON, CanadaHQ checked Sep 28, 2026	51-200	98 contacts →
	Indirect evidence “SB Partners is a full service accounting firm located in Burlington, Ontario.” Source: RevenueBase Database · checked Sep 28, 2026
23	Ggfl LLP	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	51-200	94 contacts →
	Partial evidence “GGFL is the tax planning and accounting firm for Ottawa’s successful business people.” Source: RevenueBase Database · checked Sep 28, 2026
24	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
25	Gauvreau Accounting TAX LAW Advisory	Strong evidence	Peterborough, ON, CanadaHQ checked Sep 28, 2026	51-200	88 contacts →
	Strong evidence “At Gauvreau Accounting Tax Law Advisory, entrepreneurship drives everything we do.” 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: law firm tax services. 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 law firm tax services.
Partial evidence: Its own public description names part of law firm tax services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name law firm tax services. 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 1,273 law firm tax services based in Canada

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 12,931 reachable decision-makers.

Free signup · no credit card

View the full list →

Law firm tax services based in Canada at a glance

As of Sep 28, 2026

54.8%Verified-email coverage

18.5Average contacts per company

1-10Median size (employees)

12.7%Largest-city concentration · Toronto

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

904

11-50

292

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 1,273 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 law firm tax services, 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 “law firm tax services”. 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 law firm tax services), 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 law firm tax services, 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, 12,931 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.

Law firm tax services by metro

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 law firm tax services, 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 law firm tax services are there based in Canada?

RevenueBase identified 1,273 law firm tax services 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?

MNP, headquartered in Calgary, tops this list with the largest team on record.

Which city has the most law firm tax services?

Toronto leads with 162 headquartered companies, followed by Mississauga (74) and Calgary (73).

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 12,931 verified decision-maker contacts tracked across these 1,273 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.

Ready to reach these companies? Verified emails and direct dials for all 1,273 law firm tax services based in Canada. Start with a free account, no credit card.

Download this list →

Related lists

Law firm tax services by geography

Browse the directory

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.