Company lists · Data refreshed September 2026

Top 25 Tax advisory services companies based in Canada

Name: Tax advisory services companies based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 1,053 companies tracked

RevenueBase identified 1,053 tax advisory services companies headquartered in Canada as of September 2026 and tracks 6,088 professional contacts across them, including 2,248 with verified work emails. Toronto is the largest hub.

This list covers tax advisory services companies 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 22, 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 22, 2026 86% judged on-target in blind review

1,053Companies

6,088Contacts tracked

2,248Verified emails

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The 25 largest tax advisory services companies based in Canada

Ranked by team size

Top 25 of 1,053 tax advisory services companies based in Canada, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to tax advisory services companies: 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	FBC Farm And Small Business TAX Consultants	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 22, 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 22, 2026
2	Zeifmans	Partial evidence	Toronto, ON, CanadaHQ checked Sep 22, 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 22, 2026
3	Trowbridge Professional Corporation	Partial evidence	Toronto, ON, CanadaHQ checked Sep 22, 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 22, 2026
4	Thorsteinssons TAX Lawyers	Partial evidence	Vancouver, BC, CanadaHQ checked Sep 22, 2026	51-200	106 contacts →
	Partial evidence “Thorsteinssons is the largest Canadian law firm practicing exclusively in Tax.” Source: RevenueBase Database · checked Sep 22, 2026
5	SB Partners	Indirect evidence	Burlington, ON, CanadaHQ checked Sep 22, 2026	51-200	98 contacts →
	Indirect evidence “SB Partners is a full service accounting firm located in Burlington, Ontario.” Source: RevenueBase Database · checked Sep 22, 2026
6	Ggfl LLP	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 22, 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 22, 2026
7	Invictus Accounting Group LLP	Strong evidence	Vancouver, BC, CanadaHQ checked Sep 22, 2026	51-200	86 contacts →
	Strong evidence “Located in the heart of Downtown Vancouver, Invictus Accounting Group LLP provides consulting, accounting and tax advisory for publicly listed and privately held companies.” Source: RevenueBase Database · checked Sep 22, 2026
8	S C Partners	Strong evidence	Mississauga, ON, CanadaHQ checked Sep 22, 2026	51-200	82 contacts →
	Strong evidence “S+C Partners has been providing professional accounting, advisory and tax services across the GTA since 1987.” Source: RevenueBase Database · checked Sep 22, 2026
9	Baker Tilly Ottawa LLP	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 22, 2026	51-200	80 contacts →
	Partial evidence “At Baker Tilly Ottawa LLP, we provide expert tax, assurance, and entrepreneurial services to help your business grow and prosper.” Source: RevenueBase Database · checked Sep 22, 2026
10	Clearline CPA	Indirect evidence	Surrey, BC, CanadaHQ checked Sep 22, 2026	51-200	78 contacts →
	Indirect evidence “Clearline Chartered Professional Accountants is an accounting firm based in Vancouver, Surrey and the Tri-Cities and is dedicated to bringing clarity, strategy and confidence to…” Source: RevenueBase Database · checked Sep 22, 2026
11	Horizon Chartered Professional Accountants	Indirect evidence	Vancouver, CanadaHQ checked Sep 22, 2026	11-50	56 contacts →
	Indirect evidence “At Horizon Chartered Professional Accountants we know that financial success is achieved by more than careful planning and experienced decision-making: it is realized through a…” Source: RevenueBase Database · checked Sep 22, 2026
12	Romanovsky & Associates LLP	Indirect evidence	Edmonton & Toronto, CanadaHQ checked Sep 22, 2026	11-50	53 contacts →
	Indirect evidence “At Romanovsky and Associates we are committed to providing high quality services that are needed in today's competitive market place.” Source: RevenueBase Database · checked Sep 22, 2026
13	Cfla S.E.N.C.R.L. LLP	Indirect evidence	Brossard, QC, CanadaHQ checked Sep 22, 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 22, 2026
14	Hutcheson & CO CPA LLP	Indirect evidence	Victoria, BC, CanadaHQ checked Sep 22, 2026	11-50	49 contacts →
	Indirect evidence “Since 1987, Hutcheson & Co.” Source: RevenueBase Database · checked Sep 22, 2026
15	BDO Canada Français	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 22, 2026	1,001-5,000	46 contacts →
	Indirect evidence “Palmarès des 100 meilleurs employeurs 2026 \| 2025 I 2024 I 2023 I 2022 BDO Canada s.r.l./S.E.N.C.R.L.” Source: RevenueBase Database · checked Sep 22, 2026
16	Dusanj & Wirk Chartered Professional Accountants INC	Partial evidence	Victoria, BC, CanadaHQ checked Sep 22, 2026	11-50	44 contacts →
	Partial evidence “Dusanj & Wirk is an accounting firm based in Victoria, BC, providing accounting, taxation, auditing and advisory services.” Source: RevenueBase Database · checked Sep 22, 2026
17	Cadesky TAX	Partial evidence	Toronto, ON, CanadaHQ checked Sep 22, 2026	11-50	41 contacts →
	Partial evidence “Cadesky Tax is an independent tax consulting firm.” Source: RevenueBase Database · checked Sep 22, 2026
18	Teed Saunders Doyle	Partial evidence	Fredericton, NB, CanadaHQ checked Sep 22, 2026	11-50	38 contacts →
	Partial evidence “Teed Saunders Doyle are your local partners in accounting, taxation and business advisory services.” Source: RevenueBase Database · checked Sep 22, 2026
19	Baker Tilly Victoria LTD	Indirect evidence	Victoria, BC, CanadaHQ checked Sep 22, 2026	51-200	34 contacts →
	Indirect evidence “Baker Tilly Victoria Ltd, Chartered Accountants, is a full service accounting firm situated in Victoria, Canada.” Source: RevenueBase Database · checked Sep 22, 2026
20	Rosen & Associates TAX LAW	Partial evidence	Toronto, ON, CanadaHQ checked Sep 22, 2026	11-50	33 contacts →
	Partial evidence “Rosen & Associates Tax Law (“R&A Tax Law) is a national tax law firm based in Toronto, Ontario.” Source: RevenueBase Database · checked Sep 22, 2026
21	Powell Jones LLP	Indirect evidence	Barrie, ON, CanadaHQ checked Sep 22, 2026	11-50	31 contacts →
	Indirect evidence “Founded in 1952, Powell Jones LLP is an independent locally based accounting firm that has been serving individuals and businesses throughout Barrie and Simcoe County for over 65…” Source: RevenueBase Database · checked Sep 22, 2026
22	Sblr LLP Chartered Professional Accountants	Partial evidence	Toronto, ON, CanadaHQ checked Sep 22, 2026	11-50	31 contacts →
	Partial evidence “SBLR LLP is a rapidly evolving mid-sized accounting and tax firm that focuses on delivering top service to the small and medium-size entrepreneurial business owner.” Source: RevenueBase Database · checked Sep 22, 2026
23	Diversico, Experts-Conseils	Indirect evidence	Brossard, QC, CanadaHQ checked Sep 22, 2026	51-200	31 contacts →
	Indirect evidence “Planification fiscale, financière et successorale” Source: RevenueBase Database · checked Sep 22, 2026
24	Fisher Professional Corporation	Indirect evidence	London, ON, CanadaHQ checked Sep 22, 2026	11-50	26 contacts →
	Indirect evidence “Fisher Professional Corporation is a well established London-based CPA firm.” Source: RevenueBase Database · checked Sep 22, 2026
25	Westmark TAX	Partial evidence	Vancouver, BC, CanadaHQ checked Sep 22, 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 22, 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: tax advisory services companies. 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 tax advisory services companies.
Partial evidence: Its own public description names part of tax advisory services companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name tax advisory services companies. 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 1,053 tax advisory services companies based in Canada

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Tax advisory services companies based in Canada at a glance

As of Sep 22, 2026

36.9%Verified-email coverage

5.8Average contacts per company

1-10Median size (employees)

10.7%Largest-city concentration · Toronto

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

806

11-50

200

51-200

201-500

501-1,000

1,001-5,000

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 1,053 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 tax advisory services companies, 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 “tax advisory services companies”. 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 tax advisory services companies), 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 tax advisory services companies, 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, 2,248 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 22, 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.

Tax advisory services companies by metro

Tax advisory services companies in Toronto113
Tax advisory services companies in Calgary69
Tax advisory services companies in Mississauga68
Tax advisory services companies in Montreal53
Tax advisory services companies in Vancouver46
Tax advisory services companies in Edmonton29
Tax advisory services companies in Ottawa27

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 tax advisory services companies, 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 tax advisory services companies are there based in Canada?

RevenueBase identified 1,053 tax advisory services companies 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?

FBC Farm And Small Business TAX Consultants, headquartered in Calgary, tops this list with the largest team on record.

Which city has the most tax advisory services companies?

Toronto leads with 113 headquartered companies, followed by Calgary (69) and Mississauga (68).

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 2,248 verified decision-maker contacts tracked across these 1,053 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 22, 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.