Company lists · Data refreshed November 2026

Top 25 Tax optimization services worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 35,635 companies tracked

RevenueBase identified 35,635 company matches for tax optimization services worldwide as of November 2026 and tracks 335,186 professional contacts across them, including 96,549 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for tax optimization services worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026. Country and city lists for tax optimization services follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built

35,635Companies

335,186Contacts tracked

96,549Verified emails

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The 25 largest tax optimization services worldwide

Ranked by team size

Top 25 of 35,635 company matches for tax optimization services worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	H&r Block	Exact match	Kansas City, MO, United StatesHQ recorded Nov 6, 2026	10001+	64,430 contacts →
	Exact match “H&R Block’s purpose is simple: To provide help and inspire confidence in our clients and communities everywhere.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	CA Firm	Exact match	Chennai, IndiaHQ recorded Nov 6, 2026	n/a	10,802 contacts →
	Exact match “The core business of our firm is to provide comprehensive package of accounting, secretarial, taxation and business advisory services to Corporate Clients.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	RYAN	Exact match	Dallas, CT, United StatesHQ recorded Nov 6, 2026	5,001-10,000	6,580 contacts →
	Exact match “Ryan, an award-winning global tax services and software provider, is the largest Firm in the world dedicated exclusively to business taxes.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Leyton	Exact match	Issy-les-moulineaux, FranceHQ recorded Nov 6, 2026	1,001-5,000	3,262 contacts →
	Exact match “We are an international consulting firm that helps businesses leverage financial incentives to boost their growth and achieve long-lasting performance.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	S&w	Exact match	London, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	2,311 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	TAX Consultant	Exact match	Brighton, United KingdomHQ recorded Nov 6, 2026	n/a	2,211 contacts →
	Exact match “A traditional general practice, with a twist.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	PKF O'connor Davies	Exact match	Harrison, NY, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,814 contacts →
	Exact match “PKF O’Connor Davies is a top-tier accounting, tax and advisory practice with a long history of serving domestic and international clients.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Grant Thornton Sweden	Exact match	Stockholm, SwedenHQ recorded Nov 6, 2026	1,001-5,000	1,726 contacts →
	Exact match “Grant Thornton är ett ledande revisions- och rådgivningsföretag med över 1400 medarbetare som erbjuder tjänster inom revision, skatt, redovisning och specialistrådgivning.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	BDO Germany	Exact match	Hamburg, GermanyHQ recorded Nov 6, 2026	1,001-5,000	1,665 contacts →
	Exact match “BDO is the leading entrepreneurial driven provider for audit and audit-related services, tax and business law consulting as well as advisory services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	AAB	Exact match	Uk And Ireland, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	1,267 contacts →
	Exact match “We provide services that help businesses at every stage of the lifecycle.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	The Bonadio Group	Exact match	Pittsford, DE, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,153 contacts →
	Exact match “Founded in 1978 and led by active and engaged problem solvers, The Bonadio Group (TBG) brings a unique passion and approach to our work.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	TC Group	Exact match	Steyning, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	1,052 contacts →
	Exact match “TC Group \| 0330 088 \| At TC Group, everything we do is anchored in our purpose: shaping stronger businesses and building secure and meaningful futures.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	DMA	Exact match	Fort Wayne, OH, United StatesHQ recorded Nov 6, 2026	501-1,000	984 contacts →
	Exact match “Great Place to Work® Certified™ DMA, a proudly employee-owned company, has been solving corporate tax challenges for its clients since 1972.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	WTS Deutschland	Exact match	Munich, GermanyHQ recorded Nov 6, 2026	1,001-5,000	905 contacts →
	Exact match “WTS ist ein globaler Full-Service Anbieter für Steuerberatungsleistungen und Financial & Deal Advisory.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	KSM Katz, Sapper & Miller	Exact match	Indianapolis, IL, United StatesHQ recorded Nov 6, 2026	501-1,000	860 contacts →
	Exact match “KSM (Katz, Sapper & Miller) is a nationally recognized advisory, tax, and audit firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	WIPRO	Exact match	Valencia, SpainHQ recorded Nov 6, 2026	n/a	832 contacts →
	Exact match “En Wipro impulsamos el progreso.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Bonellierede	Exact match	Milan, ItalyHQ recorded Nov 6, 2026	501-1,000	814 contacts →
	Exact match “BonelliErede è leader in Italia nei servizi legali e fiscali, attivo in tutti i settori del diritto commerciale e nel diritto penale d'impresa.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	PWC Hungary	Exact match	Budapest, HungaryHQ recorded Nov 6, 2026	501-1,000	780 contacts →
	Exact match “A PwC Magyarország közel három évtizede nyújt ügyfeleinek nemzetközi színvonalú szolgáltatást könyvvizsgálat, adótanácsadás és üzleti tanácsadás területeken.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Mauldin & Jenkins	Exact match	Atlanta, GA, United StatesHQ recorded Nov 6, 2026	501-1,000	762 contacts →
	Exact match “Mauldin & Jenkins, LLC believes that by working together with our clients, we can accomplish anything!” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Blick Rothenberg	Exact match	Covent Garden, United KingdomHQ recorded Nov 6, 2026	501-1,000	742 contacts →
	Exact match “Blick Rothenberg is a leading tax, accounting and business advisory firm founded on personal integrity and technical expertise.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Chevez	Exact match	Mexico City, MexicoHQ recorded Nov 6, 2026	501-1,000	740 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Deloitte Société D'avocats	Exact match	Paris La Défense, FranceHQ recorded Nov 6, 2026	501-1,000	728 contacts →
	Exact match “Deloitte Société d'Avocats is one of the leading French law firms, specializing in international tax and legal strategies.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Kpmg Avocats	Exact match	Courbevoie, FranceHQ recorded Nov 6, 2026	501-1,000	677 contacts →
	Exact match “Les entreprises de toutes tailles sont exposées à des dispositions de plus en plus complexes en matière de réglementations fiscales et juridiques sur leur territoire national et…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	KUMAR	Exact match	n/a	1,001-5,000	638 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Citrin Cooperman India LLP	Exact match	Ahmedabad, IndiaHQ recorded Nov 6, 2026	201-500	637 contacts →
	Exact match “Citrin Cooperman (citrincooperman.com) is among the leading, nationally recognized professional services firms currently ranked in the top 25 firms in the United States by…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “tax optimization services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 35,635 tax optimization services worldwide

See the full list, filter by size, metro and specialty, and access 96,549 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Tax optimization services worldwide at a glance

As of Nov 6, 2026

28.8%Verified-email coverage

9.4Average contacts per company

1-10Median size (employees)

1.8%Largest-city concentration · Sao Paulo

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

22,699

11-50

10,204

51-200

1,566

201-500

205

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

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for tax optimization services are linked below.
What qualifies: Company records worldwide whose business descriptions match “tax optimization services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 96,549 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Tax optimization services by location

165 lists · largest first

Every Tax optimization services 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 SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “tax optimization services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many tax optimization services are there worldwide?

RevenueBase identified 35,635 company matches for tax optimization services worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

H&r Block tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most tax optimization services?

The United States leads with 7,610 companies, followed by Germany (4,179) and Brazil (3,151). Every tax optimization services list by country and city is linked on this page.

Which city has the most tax optimization services?

Sao Paulo leads with 645 company records, followed by London (485) and Dubai (260).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 96,549 professional contacts with verified work emails tracked across these 35,635 companies; direct dials are available where recorded.

How current is this list?

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