Company lists · Data refreshed September 2026

Top 25 Tax law firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 50,577 companies tracked

RevenueBase identified 50,577 tax law firms worldwide as of September 2026 and tracks 705,637 professional contacts across them, including 285,146 with verified work emails and 141,324 with mobile numbers. The United States is the largest market and Sao Paulo the largest hub.

This list covers tax law 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 law 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

50,577Companies

705,637Contacts tracked

285,146Verified emails

141,324Mobile numbers

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The 25 largest tax law firms worldwide

Ranked by team size

Top 25 of 50,577 tax law 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 law 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	Partial evidence	Calgary, AB, CanadaHQ checked Sep 6, 2026	5,001-10,000	8,773 contacts →
	Partial evidence “MNP is a leading national accounting, tax and business consulting firm in Canada.” Source: RevenueBase Database · checked Sep 6, 2026
2	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
3	LAW Firm	Indirect evidence	London, United KingdomHQ checked Sep 6, 2026	n/a	6,284 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 6, 2026
4	Kpmg España	Indirect evidence	Madrid, SpainHQ checked Sep 6, 2026	5,001-10,000	5,114 contacts →
	Indirect evidence “KPMG en España es una firma de servicios profesionales que ofrece servicios de auditoría, fiscales y de asesoramiento legal, financiero y de negocio con más de 2.700 profesionales…” Source: RevenueBase Database · checked Sep 6, 2026
5	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
6	Garrigues	Strong evidence	Madrid, SpainHQ checked Sep 6, 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 Sep 6, 2026
7	Minterellison	Partial evidence	AustraliaHQ checked Sep 6, 2026	1,001-5,000	2,667 contacts →
	Partial evidence “MinterEllison is one of Australia’s largest independent law and consulting firms.” Source: RevenueBase Database · checked Sep 6, 2026
8	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
9	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
10	Nelson Wilians Advogados	Indirect evidence	São Paulo, BrazilHQ checked Sep 6, 2026	1,001-5,000	2,267 contacts →
	Indirect evidence “Desde a NWADV transforma desafios jurídicos complexos em decisões mais seguras para empresas nacionais e internacionais.” Source: RevenueBase Database · checked Sep 6, 2026
11	FIDAL	Partial evidence	Paris La Défense, FranceHQ checked Sep 6, 2026	1,001-5,000	2,225 contacts →
	Partial evidence “Fidal is the largest leading independent business law firm in France.” Source: RevenueBase Database · checked Sep 6, 2026
12	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
13	Slaughter And MAY	Partial evidence	London, United KingdomHQ checked Sep 6, 2026	1,001-5,000	1,951 contacts →
	Partial evidence “Slaughter and May is regarded as one of the most prestigious law firms in the world.” Source: RevenueBase Database · checked Sep 6, 2026
14	S&w	Indirect evidence	London, United KingdomHQ checked Sep 6, 2026	1,001-5,000	1,930 contacts →
	Indirect 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	Mccarthy Tétrault	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 6, 2026	1,001-5,000	1,913 contacts →
	Indirect evidence “McCarthy Tétrault provides a broad range of legal services, advising on large and complex assignments for Canadian and international interests.” Source: RevenueBase Database · checked Sep 6, 2026
16	Clayton UTZ	Partial evidence	Sydney, AustraliaHQ checked Sep 6, 2026	1,001-5,000	1,787 contacts →
	Partial evidence “We are one of Australia's oldest and largest law firms, with offices in six cities, nearly 200 partners, and a full range of legal services for large private sector and government…” Source: RevenueBase Database · checked Sep 6, 2026
17	Tozzinifreire Advogados	Partial evidence	São Paulo, BrazilHQ checked Sep 6, 2026	1,001-5,000	1,580 contacts →
	Partial evidence “TozziniFreire is one of the leading legal services organizations in Latin America, operating in all areas of Business Law and with a significant track record in serving national…” Source: RevenueBase Database · checked Sep 6, 2026
18	BDO Germany	Strong evidence	Hamburg, GermanyHQ checked Sep 6, 2026	1,001-5,000	1,576 contacts →
	Strong 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
19	Blake, Cassels & Graydon LLP	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 6, 2026	1,001-5,000	1,555 contacts →
	Indirect evidence “At Blake, Cassels & Graydon LLP (Blakes), we serve a diverse national and international client base.” Source: RevenueBase Database · checked Sep 6, 2026
20	Loyens & Loeff	Strong evidence	Amsterdam, NetherlandsHQ checked Sep 6, 2026	1,001-5,000	1,548 contacts →
	Strong evidence “As a leading Law & Tax firm, Loyens & Loeff is the logical choice for a legal and tax partner if you do business in or from the Netherlands, Belgium, Luxembourg and Switzerland…” Source: RevenueBase Database · checked Sep 6, 2026
21	Kpmg Argentina	Indirect evidence	Caba, IndiaHQ checked Sep 6, 2026	1,001-5,000	1,510 contacts →
	Indirect evidence “KPMG Argentina es una firma que provee servicios profesionales de Auditoría, Impuestos y Legales, Asesoría.” Source: RevenueBase Database · checked Sep 6, 2026
22	Mishcon DE Reya LLP	Indirect evidence	London, United KingdomHQ checked Sep 6, 2026	1,001-5,000	1,376 contacts →
	Indirect evidence “Based in London, Mishcon de Reya services an international community of clients and provides advice in situations where the constraints of geography often do not apply.” Source: RevenueBase Database · checked Sep 6, 2026
23	Rödl & Partner	Partial evidence	Nurnberg, GermanyHQ checked Sep 6, 2026	5,001-10,000	1,301 contacts →
	Partial evidence “As attorneys, tax advisers, management and IT consultants and auditors, we are present with 110 own offices in around 50 countries.” Source: RevenueBase Database · checked Sep 6, 2026
24	Pinheiro Neto Advogados	Indirect evidence	São Paulo, BrazilHQ checked Sep 6, 2026	1,001-5,000	1,250 contacts →
	Indirect evidence “Pinheiro Neto Advogados é um escritório brasileiro com sólida experiência em mais de 40 áreas do Direito Empresarial.” Source: RevenueBase Database · checked Sep 6, 2026
25	Hill Dickinson LLP	Partial evidence	Liverpool, United KingdomHQ checked Sep 6, 2026	1,001-5,000	1,231 contacts →
	Partial evidence “An unpredictable world calls for a progressive-thinking law firm that’s aligned to your ambitions.” 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 law 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 law firms.
Partial evidence: Its own public description names part of tax law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name tax law 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 50,577 tax law firms worldwide

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Tax law firms worldwide at a glance

As of Sep 6, 2026

40.4%Verified-email coverage

20.0%Mobile-number coverage

14.0Average contacts per company

1-10Median size (employees)

4.0%Largest-city concentration · Sao Paulo

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

31,253

11-50

15,368

51-200

2,749

201-500

362

501-1,000

157

1,001-5,000

112

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 law 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: 40 countries, largest first: the United States, Brazil, Germany, Spain, Italy, the United Kingdom, Australia, France, Canada, the Netherlands and 30 more. Country and city lists for tax law firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “tax law 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 law 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 law 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, 285,146 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 law firms by location

258 lists · largest first

Every Tax law 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 law 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 law firms are there worldwide?

RevenueBase identified 50,577 tax law 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?

MNP, headquartered in Calgary, tops this list with the largest team on record.

Which country has the most tax law firms?

The United States leads with 13,660 companies, followed by Brazil (8,693) and Germany (5,379). Every tax law firms list by country and city is linked on this page.

Which city has the most tax law firms?

Sao Paulo leads with 2019 headquartered companies, followed by London (656) and Paris (645).

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 285,146 verified decision-maker contacts tracked across these 50,577 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.