Company lists · Data refreshed September 2026

Top 25 Tax services accounting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 72,900 companies tracked

RevenueBase identified 72,900 tax services accounting firms worldwide as of September 2026 and tracks 906,225 professional contacts across them, including 331,039 with verified work emails and 176,246 with mobile numbers. The United States is the largest market and Sao Paulo the largest hub.

This list covers tax services accounting 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 6, 2026. Country and city lists for tax services accounting 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 6, 2026 86% judged on-target in blind review

72,900Companies

906,225Contacts tracked

331,039Verified emails

176,246Mobile numbers

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The 25 largest tax services accounting firms worldwide

Ranked by team size

Top 25 of 72,900 tax services accounting firms worldwide, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to tax services accounting 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	Kpmg UK	Indirect evidence	London, United KingdomHQ checked Sep 6, 2026	10001+	14,509 contacts →
	Indirect evidence “Make growth happen.” Source: RevenueBase Database · checked Sep 6, 2026
2	MNP	Strong evidence	Calgary, AB, CanadaHQ checked Sep 6, 2026	5,001-10,000	8,773 contacts →
	Strong evidence “MNP is a leading national accounting, tax and business consulting firm in Canada.” Source: RevenueBase Database · checked Sep 6, 2026
3	BDO UK	Partial evidence	London, United KingdomHQ checked Sep 6, 2026	5,001-10,000	6,933 contacts →
	Partial evidence “BDO LLP is an accountancy and business advisory firm that provides Audit, Tax, Deals, and Consulting, Risk & Outsourcing (CR & O) services to entrepreneurial, growing and…” Source: RevenueBase Database · checked Sep 6, 2026
4	Kpmg France	Indirect evidence	Paris La Défense, FranceHQ checked Sep 6, 2026	10001+	5,839 contacts →
	Indirect evidence “Leader de l'audit, du conseil et de l'expertise comptable, KPMG France est membre de KPMG International, réseau de cabinets indépendants exerçant dans 155 pays.” Source: RevenueBase Database · checked Sep 6, 2026
5	Grant Thornton UK	Indirect evidence	London, United KingdomHQ checked Sep 6, 2026	5,001-10,000	5,509 contacts →
	Indirect evidence “When choosing an advisor, you could accept the usual compromises.” Source: RevenueBase Database · checked Sep 6, 2026
6	BDO Canada	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 6, 2026	1,001-5,000	4,833 contacts →
	Indirect evidence “Canada’s Top 100 Employers 2025 I 2024 I 2023 I 2022 BDO Canada LLP is a leading provider of professional services to clients across a variety of sectors and segments.” Source: RevenueBase Database · checked Sep 6, 2026
7	PWC Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 6, 2026	1,001-5,000	3,413 contacts →
	Indirect evidence “PwC Luxembourg is the largest professional services firm in Luxembourg with over 3,600 people employed from 90 different countries.” Source: RevenueBase Database · checked Sep 6, 2026
8	In Extenso	Indirect evidence	Lyon, FranceHQ checked Sep 6, 2026	5,001-10,000	3,278 contacts →
	Indirect evidence “Crée en 1991 In Extenso est l’un des leaders de l’expertise comptable en France.” Source: RevenueBase Database · checked Sep 6, 2026
9	Kpmg Ireland	Partial evidence	Dublin 2, IrelandHQ checked Sep 6, 2026	1,001-5,000	2,952 contacts →
	Partial evidence “KPMG is a leading provider of professional services, offering a range of audit, tax and advisory services to a broad range of domestic and international clients across all sectors…” Source: RevenueBase Database · checked Sep 6, 2026
10	BDO In Australia	Partial evidence	Bdo, IndonesiaHQ checked Sep 6, 2026	1,001-5,000	2,528 contacts →
	Partial evidence “BDO is a trusted adviser to clients seeking audit, tax and advisory services.” Source: RevenueBase Database · checked Sep 6, 2026
11	Grant Thornton Ireland	Indirect evidence	Dublin, IrelandHQ checked Sep 6, 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 6, 2026
12	PWC Sweden	Indirect evidence	Stockholm, SwedenHQ checked Sep 6, 2026	1,001-5,000	2,276 contacts →
	Indirect evidence “På PwC hjälper vi våra kunder att bygga förtroende och ställa om sin verksamhet för att öka konkurrenskraften.” Source: RevenueBase Database · checked Sep 6, 2026
13	TAX Consultant	Indirect evidence	Brighton, United KingdomHQ checked Sep 6, 2026	n/a	2,042 contacts →
	Indirect evidence “A traditional general practice, with a twist.” Source: RevenueBase Database · checked Sep 6, 2026
14	S&w	Partial evidence	London, United KingdomHQ checked Sep 6, 2026	1,001-5,000	1,930 contacts →
	Partial evidence “As a fast growing UK accounting and advisory firm, we’ve been there, as a trusted partner, helping businesses and individuals meet challenges and seize opportunities across…” Source: RevenueBase Database · checked Sep 6, 2026
15	BDO South Africa	Partial evidence	Johannesburg, South AfricaHQ checked Sep 6, 2026	1,001-5,000	1,870 contacts →
	Partial evidence “Audit \| Advisory \| Tax The South African member firm of BDO International - The Leader for Exceptional Client Service since 1963 BDO clients experience a distinctive level of…” Source: RevenueBase Database · checked Sep 6, 2026
16	BDO Brazil	Indirect evidence	Sp, BrazilHQ checked Sep 6, 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 6, 2026
17	Grant Thornton Sweden	Indirect evidence	Stockholm, SwedenHQ checked Sep 6, 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 6, 2026
18	Kpmg Poland	Indirect evidence	Warsaw, PolandHQ checked Sep 6, 2026	1,001-5,000	1,696 contacts →
	Indirect evidence “KPMG jest globalną organizacją niezależnych firm świadczących profesjonalne usługi z zakresu audytu, doradztwa podatkowego, finansowego, prawnego oraz consultingu.” Source: RevenueBase Database · checked Sep 6, 2026
19	Grant Thornton Australia	Indirect evidence	Sydney, AustraliaHQ checked Sep 6, 2026	1,001-5,000	1,626 contacts →
	Indirect evidence “Your business deserves remarkable support.” Source: RevenueBase Database · checked Sep 6, 2026
20	BDO Germany	Partial evidence	Hamburg, GermanyHQ checked Sep 6, 2026	1,001-5,000	1,576 contacts →
	Partial evidence “BDO is the leading entrepreneurial driven provider for audit and audit-related services, tax and business law consulting as well as advisory services.” Source: RevenueBase Database · checked Sep 6, 2026
21	Beierholm	Indirect evidence	Aalborg, DenmarkHQ checked Sep 6, 2026	1,001-5,000	1,568 contacts →
	Indirect evidence “Beierholm is the preferred auditing and consulting company for small and medium-sized companies in Denmark.” Source: RevenueBase Database · checked Sep 6, 2026
22	BDO Norge	Indirect evidence	Oslo, NorwayHQ checked Sep 6, 2026	1,001-5,000	1,530 contacts →
	Indirect evidence “We see great value in having a local presence and roots, factors which enable us to work closely with our clients.” Source: RevenueBase Database · checked Sep 6, 2026
23	Kpmg Portugal	Partial evidence	Lisboa, PortugalHQ checked Sep 6, 2026	1,001-5,000	1,493 contacts →
	Partial evidence “KPMG is a global organization of independent professional services firms providing Audit, Tax and Advisory services.” Source: RevenueBase Database · checked Sep 6, 2026
24	RSM Ebner Stolz	Indirect evidence	Stuttgart, GermanyHQ checked Sep 6, 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 6, 2026
25	Crowe UK	Partial evidence	London, United KingdomHQ checked Sep 6, 2026	1,001-5,000	1,395 contacts →
	Partial evidence “Crowe UK is a leading audit, tax, advisory and consulting firm with a national presence to complement our international reach.” Source: RevenueBase Database · checked Sep 6, 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 accounting 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 accounting firms.
Partial evidence: Its own public description names part of tax services accounting 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 accounting 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 72,900 tax services accounting firms worldwide

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Tax services accounting firms worldwide at a glance

As of Sep 6, 2026

36.5%Verified-email coverage

19.4%Mobile-number coverage

12.4Average contacts per company

1-10Median size (employees)

2.4%Largest-city concentration · Sao Paulo

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

47,883

11-50

20,143

51-200

3,209

201-500

460

501-1,000

154

1,001-5,000

160

5,001-10,000

10001+

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 accounting 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: 42 countries, largest first: the United States, Brazil, the United Kingdom, Germany, Canada, Australia, France, Italy, the Netherlands, Spain and 32 more. Country and city lists for tax services accounting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “tax services accounting 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 accounting 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 accounting 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, 331,039 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 6, 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 accounting firms by location

351 lists · largest first

Every Tax services accounting 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 accounting 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 accounting firms are there worldwide?

RevenueBase identified 72,900 tax services accounting 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?

Kpmg UK, headquartered in London, tops this list with the largest team on record.

Which country has the most tax services accounting firms?

The United States leads with 23,527 companies, followed by Brazil (10,146) and the United Kingdom (6,361). Every tax services accounting firms list by country and city is linked on this page.

Which city has the most tax services accounting firms?

Sao Paulo leads with 1725 headquartered companies, followed by London (1239) and New York (558).

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 331,039 verified decision-maker contacts tracked across these 72,900 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 6, 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.