Company lists · Data refreshed September 2026

Top 25 Tax services firms worldwide

Name: Tax services firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 45,806 companies tracked

RevenueBase identified 45,806 tax services firms worldwide as of September 2026 and tracks 349,998 professional contacts across them, including 92,227 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers tax services firms worldwide, 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. Country and city lists for tax services firms follow the table.

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

45,806Companies

349,998Contacts tracked

92,227Verified emails

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The 25 largest tax services firms worldwide

Ranked by team size

Top 25 of 45,806 tax services firms worldwide, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to tax services 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	CA Firm	Indirect evidence	Chennai, IndiaHQ checked Sep 22, 2026	n/a	10,260 contacts →
	Indirect evidence “The core business of our firm is to provide comprehensive package of accounting, secretarial, taxation and business advisory services to Corporate Clients.” Source: RevenueBase Database · checked Sep 22, 2026
2	BDO In Indonesia	Indirect evidence	Jakarta, IndonesiaHQ checked Sep 22, 2026	501-1,000	1,508 contacts →
	Indirect evidence “BDO is the leading provider of professional services within the mid-tier of our profession.” Source: RevenueBase Database · checked Sep 22, 2026
3	H&r Block Canada	Strong evidence	Calgary, AB, CanadaHQ checked Sep 22, 2026	5,001-10,000	889 contacts →
	Strong evidence “We’re Canada’s leading tax preparation firm for over 60 years – delivering value to Canadians by our expertise and knowledge in handling all tax situations and by our commitment…” Source: RevenueBase Database · checked Sep 22, 2026
4	KUMAR	Indirect evidence	United StatesHQ checked Sep 22, 2026	1,001-5,000	627 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
5	Scrubbed.Net Global Services	Strong evidence	San Fernando, PhilippinesHQ checked Sep 22, 2026	1,001-5,000	617 contacts →
	Strong evidence “Scrubbed is an outsourced professional services firm providing a complete suite of accounting*, finance, and tax services, as well as support services for professional…” Source: RevenueBase Database · checked Sep 22, 2026
6	BDO Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 22, 2026	501-1,000	600 contacts →
	Indirect evidence “BDO Luxembourg is one of the largest firms of accountants, auditors and consultants in Luxembourg.” Source: RevenueBase Database · checked Sep 22, 2026
7	Buzzacott	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	501-1,000	575 contacts →
	Indirect evidence “Buzzacott is an accountancy and advisory firm with a long-standing history of supporting individuals, businesses, and not-for-profits.” Source: RevenueBase Database · checked Sep 22, 2026
8	H&r Block Australia	Strong evidence	Thornleigh, AustraliaHQ checked Sep 22, 2026	501-1,000	412 contacts →
	Strong evidence “As Australia’s largest preparer of personal income tax returns, with over 400 offices across Australia, expert help is never far away.” Source: RevenueBase Database · checked Sep 22, 2026
9	VLH	Indirect evidence	Neustadt An Der Weinstrasse, GermanyHQ checked Sep 22, 2026	1,001-5,000	373 contacts →
	Indirect evidence “Deutschlands Nr.” Source: RevenueBase Database · checked Sep 22, 2026
10	Transaction Square	Strong evidence	Mumbai, IndiaHQ checked Sep 22, 2026	201-500	274 contacts →
	Strong evidence “Transaction Square is a Tax, Regulatory and Business Advisory firm founded by entrepreneurial Big-4 Partners having collective advisory experience spanning over 3 decades.” Source: RevenueBase Database · checked Sep 22, 2026
11	Etl-Gruppe	Indirect evidence	Berlin, GermanyHQ checked Sep 22, 2026	10001+	273 contacts →
	Indirect evidence “Die ETL-Gruppe ist in Deutschland mit über 970 Kanzleien vertreten und darüber hinaus in mehr als 60 Ländern weltweit mit über 1.470 Standorten präsent und erwirtschaftet einen…” Source: RevenueBase Database · checked Sep 22, 2026
12	Singhvi DEV & Unni Llp, Chartered Accountants	Indirect evidence	Bangalore, IndiaHQ checked Sep 22, 2026	201-500	273 contacts →
	Indirect evidence “Established in the year 1981, Singhvi Dev & Unni LLP, Chartered Accountants (SDU), is a professional services firm headquartered in Bengaluru, India and also operating from its…” Source: RevenueBase Database · checked Sep 22, 2026
13	Taxprime	Strong evidence	Jakarta Selatan, IndonesiaHQ checked Sep 22, 2026	201-500	269 contacts →
	Strong evidence “TaxPrime is a Tax Consulting Firm, based in Jakarta, the Capital City of Indonesia.” Source: RevenueBase Database · checked Sep 22, 2026
14	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
15	Capeos	Indirect evidence	Rennes, FranceHQ checked Sep 22, 2026	201-500	223 contacts →
	Indirect evidence “CAPEOS accompagne la gestion et le développement d’entreprises depuis plus de 45 ans.” Source: RevenueBase Database · checked Sep 22, 2026
16	Lubbock Fine	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	203 contacts →
	Strong evidence “Lubbock Fine is an independent accounting, tax, audit and advisory firm in the City of London.” Source: RevenueBase Database · checked Sep 22, 2026
17	MBE Cpas	Strong evidence	Baraboo, WI, United StatesHQ checked Sep 22, 2026	51-200	201 contacts →
	Strong evidence “We are driven by more than a quality tax return, we provide effective solutions to help you, your family, and your business succeed.” Source: RevenueBase Database · checked Sep 22, 2026
18	ADS Allgemeine Deutsche Steuerberatungsgesellschaft MBH	Indirect evidence	Hamburg, GermanyHQ checked Sep 22, 2026	501-1,000	198 contacts →
	Indirect evidence “Die ADS Steuer.Beratung ist Ihr spezialisierter Partner für ganzheitliche Steuerberatung – exklusiv für Unternehmen.” Source: RevenueBase Database · checked Sep 22, 2026
19	Fiduciaire	Indirect evidence	Beaufays, BelgiumHQ checked Sep 22, 2026	n/a	198 contacts →
	Indirect evidence “Bonjour et bienvenue sur la page entreprise de la Fiduciaire au Carré - Une équipe dynamique à votre service- Assistance efficace et conseils individualisés tant aux personnes…” Source: RevenueBase Database · checked Sep 22, 2026
20	JCA Contadores	Indirect evidence	Niterói, BrazilHQ checked Sep 22, 2026	51-200	193 contacts →
	Indirect evidence “Excelência em consultoria.” Source: RevenueBase Database · checked Sep 22, 2026
21	Dornbach	Indirect evidence	Koblenz, GermanyHQ checked Sep 22, 2026	501-1,000	186 contacts →
	Indirect evidence “DORNBACH ist eine überregional tätige Unternehmensgruppe in den Bereichen Wirtschaftsprüfung, Steuerberatung, Rechtsberatung und Unternehmensberatung.” Source: RevenueBase Database · checked Sep 22, 2026
22	Contec Contabilidade	Indirect evidence	Sumaré, BrazilHQ checked Sep 22, 2026	n/a	185 contacts →
	Indirect evidence “Desde 1971 a Contec é responsavel pela assessoria contabil e tributaria de diversas empresas da região metropolitana de Campinas e demais cidades vizinhas, construindo ao longo do…” Source: RevenueBase Database · checked Sep 22, 2026
23	O.P. Bagla & Co. LLP	Indirect evidence	New Delhi, IndiaHQ checked Sep 22, 2026	51-200	178 contacts →
	Indirect evidence “O.P.” Source: RevenueBase Database · checked Sep 22, 2026
24	TAX Group	Strong evidence	São Paulo, BrazilHQ checked Sep 22, 2026	201-500	172 contacts →
	Strong evidence “Tax Group is a network of independent professional firms dedicated to providing services in the tax area, which brings together a network of members with more than 200 employees.” Source: RevenueBase Database · checked Sep 22, 2026
25	WR Partners UK	Strong evidence	Shrewsbury, United KingdomHQ checked Sep 22, 2026	201-500	171 contacts →
	Strong evidence “We are a firm of dedicated Accountants, Business Advisors & Tax Specialists, fully committed to enhancing and protecting our clients’ financial position.” 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 services 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 tax services firms.
Partial evidence: Its own public description names part of tax services firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name tax services 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 45,806 tax services firms worldwide

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Tax services firms worldwide at a glance

As of Sep 22, 2026

26.4%Verified-email coverage

7.6Average contacts per company

1-10Median size (employees)

1.2%Largest-city concentration · Sao Paulo

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

31,279

11-50

11,876

51-200

1,734

201-500

241

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 services 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.
Coverage: Every country. Country and city lists for tax services firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “tax services 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 tax services 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 tax services firms, and records with no verified work email.
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, 92,227 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 services firms by location

190 lists · largest first

Every Tax services firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 services 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 tax services firms are there worldwide?

RevenueBase identified 45,806 tax services firms worldwide 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?

CA Firm, headquartered in Chennai, tops this list with the largest team on record.

Which country has the most tax services firms?

The United States leads with 16,253 companies, followed by Germany (3,747) and Brazil (2,966). Every tax services firms list by country and city is linked on this page.

Which city has the most tax services firms?

Sao Paulo leads with 555 headquartered companies, followed by London (444) and New York (362).

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 92,227 verified decision-maker contacts tracked across these 45,806 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.