Company lists · Data refreshed September 2026

Top 25 Tax audit firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 25,436 companies tracked

RevenueBase identified 25,436 tax audit firms worldwide as of September 2026 and tracks 275,945 professional contacts across them, including 66,018 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers tax audit 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 audit 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

25,436Companies

275,945Contacts tracked

66,018Verified emails

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The 25 largest tax audit firms worldwide

Ranked by team size

Top 25 of 25,436 tax audit 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 audit 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	H&r Block	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 22, 2026	10001+	59,451 contacts →
	Indirect evidence “H&R Block’s purpose is simple: To provide help and inspire confidence in our clients and communities everywhere.” Source: RevenueBase Database · checked Sep 22, 2026
2	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
3	Eide Bailly LLP	Indirect evidence	United StatesHQ checked Sep 22, 2026	1,001-5,000	3,643 contacts →
	Indirect evidence “We’re Eide Bailly (I’d bay-lee), a business advisory, accounting and technology firm built with our clients in mind.” Source: RevenueBase Database · checked Sep 22, 2026
4	Grant Thornton Ireland	Indirect evidence	Dublin, IrelandHQ checked Sep 22, 2026	1,001-5,000	2,374 contacts →
	Indirect evidence “In Ireland, Grant Thornton Ireland and Grant Thornton Corporate Finance Limited (and their respective subsidiary/affiliate entities) operate under an alternative practice…” Source: RevenueBase Database · checked Sep 22, 2026
5	TAX Consultant	Indirect evidence	Brighton, United KingdomHQ checked Sep 22, 2026	n/a	2,042 contacts →
	Indirect evidence “A traditional general practice, with a twist.” Source: RevenueBase Database · checked Sep 22, 2026
6	BDO Brazil	Indirect evidence	Sp, BrazilHQ checked Sep 22, 2026	1,001-5,000	1,791 contacts →
	Indirect evidence “Presidida por Raul Corrêa da Silva, a BDO RCS foi fundada em 2001 e desde então mantém participação expressiva no mercado de auditorias.” Source: RevenueBase Database · checked Sep 22, 2026
7	Grant Thornton Sweden	Indirect evidence	Stockholm, SwedenHQ checked Sep 22, 2026	1,001-5,000	1,724 contacts →
	Indirect evidence “Grant Thornton är ett ledande revisions- och rådgivningsföretag med över 1400 medarbetare som erbjuder tjänster inom revision, skatt, redovisning och specialistrådgivning.” Source: RevenueBase Database · checked Sep 22, 2026
8	RSM Ebner Stolz	Indirect evidence	Stuttgart, GermanyHQ checked Sep 22, 2026	1,001-5,000	1,442 contacts →
	Indirect evidence “Wollen Sie jemanden, der Sie auch beim Sprung in neue Märkte und bei allen anstehenden Herausforderungen begleitet?” Source: RevenueBase Database · checked Sep 22, 2026
9	Moore Kingston Smith	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	501-1,000	1,151 contacts →
	Indirect evidence “At Moore Kingston Smith, we believe in the potential of people to make a positive impact, fuelled by the power of genuine understanding.” Source: RevenueBase Database · checked Sep 22, 2026
10	KSM Katz, Sapper & Miller	Strong evidence	Indianapolis, IN, United StatesHQ checked Sep 22, 2026	501-1,000	788 contacts →
	Strong evidence “KSM (Katz, Sapper & Miller) is a nationally recognized advisory, tax, and audit firm.” Source: RevenueBase Database · checked Sep 22, 2026
11	PKF Hadiwinata	Indirect evidence	Jakarta Pusat, IndonesiaHQ checked Sep 22, 2026	501-1,000	787 contacts →
	Indirect evidence “PKF Hadiwinata is a top 10 accounting & professional services firm in Indonesia, headquartered in the heart of the financial district of Jakarta, and is a member of PKF…” Source: RevenueBase Database · checked Sep 22, 2026
12	PWC Hungary	Indirect evidence	Budapest, HungaryHQ checked Sep 22, 2026	501-1,000	749 contacts →
	Indirect evidence “A PwC Magyarország közel három évtizede nyújt ügyfeleinek nemzetközi színvonalú szolgáltatást könyvvizsgálat, adótanácsadás és üzleti tanácsadás területeken.” Source: RevenueBase Database · checked Sep 22, 2026
13	Blick Rothenberg	Partial evidence	Covent Garden, United KingdomHQ checked Sep 22, 2026	501-1,000	701 contacts →
	Partial evidence “Blick Rothenberg is a leading tax, accounting and business advisory firm founded on personal integrity and technical expertise.” Source: RevenueBase Database · checked Sep 22, 2026
14	Chevez Ruiz Zamarripa	Indirect evidence	Ciudad De Mexico, MexicoHQ checked Sep 22, 2026	501-1,000	683 contacts →
	Indirect evidence “Chevez Ruiz Zamarripa, es una firma especializada en la Asesoría y Consultoría Fiscal de alto nivel, que se distingue por prestar servicios personalizados con total…” Source: RevenueBase Database · checked Sep 22, 2026
15	Flick Gocke Schaumburg	Partial evidence	Bonn, GermanyHQ checked Sep 22, 2026	501-1,000	651 contacts →
	Partial evidence “Flick Gocke Schaumburg is an independent partnership of lawyers, tax advisors and auditors working with more than 320 professionals from offices in Berlin, Bonn, Düsseldorf…” Source: RevenueBase Database · checked Sep 22, 2026
16	BDO Austria	Indirect evidence	Wien, AustriaHQ checked Sep 22, 2026	1,001-5,000	599 contacts →
	Indirect evidence “Holen Sie sich eine Datenschutzzertifizierung für Ihr Unternehmen.” Source: RevenueBase Database · checked Sep 22, 2026
17	BDO Israel	Indirect evidence	Tel Aviv, IsraelHQ checked Sep 22, 2026	1,001-5,000	574 contacts →
	Indirect evidence “BDO Israel is a dynamic and business oriented accounting and consulting firm, ranking amongst the five leading industry firms in Israel and part of the international network BDO.” Source: RevenueBase Database · checked Sep 22, 2026
18	Bennett Thrasher	Strong evidence	Atlanta, GA, United StatesHQ checked Sep 22, 2026	201-500	558 contacts →
	Strong evidence “Bennett Thrasher provides proven guidance for financial confidence through premier tax, audit, advisory, and outsourcing solutions.” Source: RevenueBase Database · checked Sep 22, 2026
19	Grupo Studio	Indirect evidence	Porto Alegre, BrazilHQ checked Sep 22, 2026	201-500	538 contacts →
	Indirect evidence “A Studio Fiscal é uma rede de franquia especializada na prestação de serviços de auditoria fiscal e planejamento tributário.” Source: RevenueBase Database · checked Sep 22, 2026
20	K C Mehta & CO LLP	Indirect evidence	Vadodara, IndiaHQ checked Sep 22, 2026	201-500	504 contacts →
	Indirect evidence “K C Mehta & Co LLP (KCM) is a team of passionate professionals.” Source: RevenueBase Database · checked Sep 22, 2026
21	DHPG	Strong evidence	Bonn, GermanyHQ checked Sep 22, 2026	1,001-5,000	460 contacts →
	Strong evidence “As an interdisciplinary medium-sized tax audit, accountancy and legal advice service we guarantee all-round high-quality consultation combined with a personal component.” Source: RevenueBase Database · checked Sep 22, 2026
22	Pp&c Auditores Independentes	Indirect evidence	São Paulo, BrazilHQ checked Sep 22, 2026	201-500	440 contacts →
	Indirect evidence “A PP & C Auditores Independentes é uma firma de auditores e especialistas nas áreas de impostos e consultoria empresarial.” Source: RevenueBase Database · checked Sep 22, 2026
23	Smith Howard	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 22, 2026	501-1,000	413 contacts →
	Partial evidence “Smith + Howard is a tax, accounting, advisory, and consulting firm headquartered in Atlanta, with a global presence.” Source: RevenueBase Database · checked Sep 22, 2026
24	Apercen Partners LLC	Partial evidence	Palo Alto, CA, United StatesHQ checked Sep 22, 2026	201-500	399 contacts →
	Partial evidence “Originating from the English and Latin roots of “apercu,” an act of insight, and “census,” an applied study of wealth and property, Apercen is a tax consulting firm offering high…” Source: RevenueBase Database · checked Sep 22, 2026
25	N. A. Shah Associates LLP	Indirect evidence	Mumbai, IndiaHQ checked Sep 22, 2026	51-200	375 contacts →
	Indirect evidence “N.” 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 audit 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 audit firms.
Partial evidence: Its own public description names part of tax audit firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name tax audit 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 25,436 tax audit firms worldwide

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Tax audit firms worldwide at a glance

As of Sep 22, 2026

23.9%Verified-email coverage

10.8Average contacts per company

1-10Median size (employees)

1.3%Largest-city concentration · Sao Paulo

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

14,786

11-50

8,507

51-200

1,482

201-500

233

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 audit 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 audit firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “tax audit 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 audit 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 audit 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, 66,018 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 audit firms by location

96 lists · largest first

Every Tax audit 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 audit 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 audit firms are there worldwide?

RevenueBase identified 25,436 tax audit 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?

H&r Block, headquartered in Kansas City, tops this list with the largest team on record.

Which country has the most tax audit firms?

The United States leads with 6,039 companies, followed by Germany (2,987) and India (2,138). Every tax audit firms list by country and city is linked on this page.

Which city has the most tax audit firms?

Sao Paulo leads with 324 headquartered companies, followed by Dubai (306) and New Delhi (200).

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 66,018 verified decision-maker contacts tracked across these 25,436 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.