Company lists · Data refreshed October 2026

Top 25 International tax accounting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Oct 1, 2026 33,265 companies tracked

RevenueBase identified 33,265 international tax accounting firms worldwide as of October 2026 and tracks 334,434 professional contacts across them, including 122,621 with verified work emails and 46,659 with mobile numbers. The United States is the largest market and Sao Paulo the largest hub.

This list covers international tax 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 October 1, 2026. Country and city lists for international tax 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 Oct 1, 2026 86% judged on-target in blind review

33,265Companies

334,434Contacts tracked

122,621Verified emails

46,659Mobile numbers

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

The 25 largest international tax accounting firms worldwide

Ranked by team size

Top 25 of 33,265 international tax accounting firms worldwide, ranked by team size, largest first. Data refreshed Oct 1, 2026. RevenueBase Smart Search rates how each company's information relates to international tax 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	MNP	Strong evidence	Calgary, AB, CanadaHQ checked Oct 1, 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 Oct 1, 2026
2	BDO UK	Partial evidence	London, United KingdomHQ checked Oct 1, 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 Oct 1, 2026
3	Mazars	Strong evidence	Paris La Defense, FranceHQ checked Oct 1, 2026	10001+	6,485 contacts →
	Strong evidence “Mazars is an internationally integrated partnership, specialising in audit, accountancy, advisory, tax and legal services*.” Source: RevenueBase Database · checked Oct 1, 2026
4	Kpmg France	Partial evidence	Paris La Défense, FranceHQ checked Oct 1, 2026	10001+	5,839 contacts →
	Partial 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 Oct 1, 2026
5	In Extenso	Indirect evidence	Lyon, FranceHQ checked Oct 1, 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 Oct 1, 2026
6	Garrigues	Strong evidence	Madrid, SpainHQ checked Oct 1, 2026	1,001-5,000	2,853 contacts →
	Strong evidence “Garrigues is an international legal and tax services firm that advises clients locally, regionally and globally from every angle of business law.” Source: RevenueBase Database · checked Oct 1, 2026
7	Grant Thornton Ireland	Indirect evidence	Dublin, IrelandHQ checked Oct 1, 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 Oct 1, 2026
8	PWC Sweden	Indirect evidence	Stockholm, SwedenHQ checked Oct 1, 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 Oct 1, 2026
9	TAX Consultant	Indirect evidence	Brighton, United KingdomHQ checked Oct 1, 2026	n/a	2,042 contacts →
	Indirect evidence “A traditional general practice, with a twist.” Source: RevenueBase Database · checked Oct 1, 2026
10	BDO Germany	Partial evidence	Hamburg, GermanyHQ checked Oct 1, 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 Oct 1, 2026
11	Grant Thornton Greece	Partial evidence	Athens, GreeceHQ checked Oct 1, 2026	1,001-5,000	1,313 contacts →
	Partial evidence “Grant Thornton SA provides personalised assurance, tax and advisory services to listed entities, privately-held businesses and public sector businesses.” Source: RevenueBase Database · checked Oct 1, 2026
12	BDO Italia	Indirect evidence	Milan, ItalyHQ checked Oct 1, 2026	1,001-5,000	1,289 contacts →
	Indirect evidence “BDO is one of the main Global Organisation of business professional services.” Source: RevenueBase Database · checked Oct 1, 2026
13	Moore Kingston Smith	Indirect evidence	London, United KingdomHQ checked Oct 1, 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 Oct 1, 2026
14	AAB	Indirect evidence	Uk And Ireland, United KingdomHQ checked Oct 1, 2026	1,001-5,000	1,125 contacts →
	Indirect evidence “We provide services that help businesses at every stage of the lifecycle.” Source: RevenueBase Database · checked Oct 1, 2026
15	WTS Deutschland	Indirect evidence	Munich, GermanyHQ checked Oct 1, 2026	1,001-5,000	882 contacts →
	Indirect evidence “WTS ist ein globaler Full-Service Anbieter für Steuerberatungsleistungen und Financial & Deal Advisory.” Source: RevenueBase Database · checked Oct 1, 2026
16	Kpmg Czech Republic	Indirect evidence	Prague, Czech RepublicHQ checked Oct 1, 2026	1,001-5,000	858 contacts →
	Indirect evidence “Poskytujeme služby v oblasti auditu, daní, poradenství a práva.” Source: RevenueBase Database · checked Oct 1, 2026
17	Bonellierede	Indirect evidence	Milan, ItalyHQ checked Oct 1, 2026	501-1,000	819 contacts →
	Indirect evidence “BonelliErede è leader in Italia nei servizi legali e fiscali, attivo in tutti i settori del diritto commerciale e nel diritto penale d'impresa.” Source: RevenueBase Database · checked Oct 1, 2026
18	Kpmg Greece	Strong evidence	Athens, GreeceHQ checked Oct 1, 2026	501-1,000	755 contacts →
	Strong evidence “Operating in Greece for more than 50 years KPMG offers through 4 entities, audit, tax, accounting & payroll, legal and advisory services to domestic and international businesses…” Source: RevenueBase Database · checked Oct 1, 2026
19	PWC Hungary	Indirect evidence	Budapest, HungaryHQ checked Oct 1, 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 Oct 1, 2026
20	Grant Thornton Netherlands	Strong evidence	Alphen Aan Den Rijn, NetherlandsHQ checked Oct 1, 2026	501-1,000	739 contacts →
	Strong evidence “Grant Thornton in the Netherlands is a memberfirm of Grant Thornton International Ltd (GTIL), one of the world's largest networks [#7] of independent accounting and consulting…” Source: RevenueBase Database · checked Oct 1, 2026
21	EY Société D'avocats	Indirect evidence	Paris, FranceHQ checked Oct 1, 2026	501-1,000	735 contacts →
	Indirect evidence “EY Société d’avocats se mobilise pour concrétiser les potentiels: c’est ainsi que nous faisons la différence pour nos clients, nos équipes et tous nos interlocuteurs.” Source: RevenueBase Database · checked Oct 1, 2026
22	Nautadutilh	Strong evidence	Amsterdam, NetherlandsHQ checked Oct 1, 2026	501-1,000	725 contacts →
	Strong evidence “NautaDutilh is one of the largest international law firms in the Benelux with some 400 lawyers, civil law notaries and tax advisers at offices in Amsterdam, Brussels, London…” Source: RevenueBase Database · checked Oct 1, 2026
23	PKF Global	Indirect evidence	London, United KingdomHQ checked Oct 1, 2026	10001+	725 contacts →
	Indirect evidence “PKF is a global family of legally independent professional services firms bound together by a shared commitment to quality, integrity and the creation of clarity in a complex…” Source: RevenueBase Database · checked Oct 1, 2026
24	Blick Rothenberg	Strong evidence	Covent Garden, United KingdomHQ checked Oct 1, 2026	501-1,000	701 contacts →
	Strong evidence “Blick Rothenberg is a leading tax, accounting and business advisory firm founded on personal integrity and technical expertise.” Source: RevenueBase Database · checked Oct 1, 2026
25	Pkf-Francis Clark Chartered Accountants & Business Advisers	Partial evidence	Exeter, United KingdomHQ checked Oct 1, 2026	501-1,000	700 contacts →
	Partial evidence “Any good accountancy firm can help with your finance, audit, and tax.” Source: RevenueBase Database · checked Oct 1, 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: international tax 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 international tax accounting firms.
Partial evidence: Its own public description names part of international tax accounting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name international tax 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 33,265 international tax accounting firms worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 122,621 reachable decision-makers.

Free signup · no credit card

View the full list →

International tax accounting firms worldwide at a glance

As of Oct 1, 2026

36.7%Verified-email coverage

14.0%Mobile-number coverage

10.1Average contacts per company

1-10Median size (employees)

2.5%Largest-city concentration · Sao Paulo

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

20,878

11-50

9,844

51-200

1,639

201-500

230

501-1,000

1,001-5,000

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 international tax 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: 38 countries, largest first: the United States, Germany, Brazil, the United Kingdom, Italy, Canada, Australia, the Netherlands, Spain, France and 28 more. Country and city lists for international tax accounting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “international tax 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 international tax 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 international tax 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, 122,621 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 October 1, 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.

International tax accounting firms by location

167 lists · largest first

Every International tax 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 international tax 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 international tax accounting firms are there worldwide?

RevenueBase identified 33,265 international tax accounting firms worldwide as of October 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 country has the most international tax accounting firms?

The United States leads with 10,001 companies, followed by Germany (4,386) and Brazil (4,162). Every international tax accounting firms list by country and city is linked on this page.

Which city has the most international tax accounting firms?

Sao Paulo leads with 835 headquartered companies, followed by London (564) and New York (323).

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 122,621 verified decision-maker contacts tracked across these 33,265 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 1, 2026.

Ready to reach these companies? Verified emails and direct dials for all 33,265 international tax accounting firms worldwide. Start with a free account, no credit card.

Download this list →

Related lists

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.