Company lists · Data refreshed September 2026

Top 25 Tax preparation outsourcing companies worldwide

Name: Tax preparation outsourcing companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 24,033 companies tracked

RevenueBase identified 24,033 company matches for tax preparation outsourcing companies worldwide as of September 2026 and tracks 199,595 professional contacts across them, including 44,028 with verified work emails. The United States is the largest market and New York the largest hub.

This list covers company matches for tax preparation outsourcing companies 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 September 29, 2026. Country and city lists for tax preparation outsourcing companies 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 Sep 29, 2026 How this list was built

24,033Companies

199,595Contacts tracked

44,028Verified emails

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The 25 largest tax preparation outsourcing companies worldwide

Ranked by team size

Top 25 of 24,033 company matches for tax preparation outsourcing companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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 Sep 29, 2026	10001+	59,451 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 · Sep 29, 2026 · View company records in RevenueBase
2	Liberty TAX	Exact match	Hurst, TX, United StatesHQ recorded Sep 29, 2026	n/a	6,260 contacts →
	Exact match “Liberty Tax is income tax preparation at its best: friendly, accurate, and with a money back guarantee.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3	RYAN	Exact match	Dallas, TX, United StatesHQ recorded Sep 29, 2026	5,001-10,000	6,089 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 · Sep 29, 2026 · View company records in RevenueBase
4	Block Advisors	Exact match	Kansas City, MO, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,379 contacts →
	Exact match “We are Block Advisors by H&R Block.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	D&v Philippines	Exact match	Makati, PhilippinesHQ recorded Sep 29, 2026	1,001-5,000	1,021 contacts →
	Exact match “D&V Philippines is a finance and accounting outsourcing company that helps CFOs, accounting firms, audit firms, and other professional services firms build reliable offshore…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6	H&r Block Canada	Exact match	Calgary, AB, CanadaHQ recorded Sep 29, 2026	5,001-10,000	889 contacts →
	Exact match “We’re Canada’s leading tax preparation firm for over 60 years – delivering value to Canadians by our expertise and knowledge in handling all tax situations and by our commitment…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7	KMK	Exact match	Ahmedabad, IndiaHQ recorded Sep 29, 2026	1,001-5,000	628 contacts →
	Exact match “KMK Ventures is a leading Outsourced Accounting & Tax solutions company providing services to clients based out of USA.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8	KUMAR	Exact match	United StatesHQ recorded Sep 29, 2026	1,001-5,000	627 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9	Scrubbed.Net Global Services	Exact match	San Fernando, PhilippinesHQ recorded Sep 29, 2026	1,001-5,000	617 contacts →
	Exact match “Scrubbed is an outsourced professional services firm providing a complete suite of accounting*, finance, and tax services, as well as support services for professional…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	Drake Software	Exact match	Franklin, United StatesHQ recorded Sep 29, 2026	501-1,000	561 contacts →
	Exact match “Drake Software, a private company founded in 1977, provides software solutions to over tax and accounting firms that file more than 40 million tax returns every year.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	Bennett Thrasher	Exact match	Atlanta, GA, United StatesHQ recorded Sep 29, 2026	201-500	558 contacts →
	Exact match “Bennett Thrasher provides proven guidance for financial confidence through premier tax, audit, advisory, and outsourcing solutions.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	Sensiba LLP	Exact match	San Jose, CA, United StatesHQ recorded Sep 29, 2026	501-1,000	493 contacts →
	Exact match “Sensiba’s comprehensive accounting, tax, and consulting services help businesses and people solve problems, navigate complexity, and build a foundation for sustainable growth.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	Outbooks	Exact match	Harrow, United KingdomHQ recorded Sep 29, 2026	201-500	477 contacts →
	Exact match “Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	Global FPO	Exact match	Noida, IndiaHQ recorded Sep 29, 2026	501-1,000	474 contacts →
	Exact match “Global FPO is an Accounting, Bookkeeping and Tax Consulting, and outsourcing company that helps CPAs, accounting firms, small and mid-sized businesses, and startups strengthen…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	H&r Block Australia	Exact match	Thornleigh, AustraliaHQ recorded Sep 29, 2026	501-1,000	412 contacts →
	Exact match “As Australia’s largest preparer of personal income tax returns, with over 400 offices across Australia, expert help is never far away.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	Apercen Partners LLC	Exact match	Palo Alto, CA, United StatesHQ recorded Sep 29, 2026	201-500	399 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	Administratiekantoor Tidak B.V	Exact match	Alphen Aan Den Rijn, NetherlandsHQ recorded Sep 29, 2026	n/a	377 contacts →
	Exact match “Tidak in Alphen aan den Rijn is het administratiekantoor voor startende ondernemers, zzp'ers, mkb en particulieren.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	Cohesive	Exact match	Exton, PA, United StatesHQ recorded Sep 29, 2026	501-1,000	364 contacts →
	Exact match “Cohesive is a leading solutions provider and systems integrator for IBM Maximo.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19	Taxact	Exact match	Dallas, TX, United StatesHQ recorded Sep 29, 2026	51-200	361 contacts →
	Exact match “TaxAct helps everyday Americans get every tax advantage they deserve by finding credits and deductions they never even knew existed.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	Advantage ONE TAX Consulting	Exact match	Sterling, VA, United StatesHQ recorded Sep 29, 2026	201-500	347 contacts →
	Exact match “Advantage One Tax Consulting is a multi-disciplinary group of highly experienced tax professionals who understand the tax practice in its true spirit, examine the issues it faces…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	1-800accountant	Exact match	New York, NY, United StatesHQ recorded Sep 29, 2026	201-500	320 contacts →
	Exact match “1-800Accoutant is America’s leading virtual accounting firm for small businesses.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	Unison Globus	Exact match	Coral Springs, FL, United StatesHQ recorded Sep 29, 2026	201-500	320 contacts →
	Exact match “Unison Globus is a global accounting outsourcing and offshore staffing partner dedicated to supporting CPA firms and accounting professionals.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	Ecovis Deutschland	Exact match	Berlin, GermanyHQ recorded Sep 29, 2026	1,001-5,000	319 contacts →
	Exact match “Wir bei Ecovis sind Steuerberater, Wirtschaftsprüfer, Rechtsanwälte und Unternehmensberater.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	GI Outsourcing	Exact match	London, United KingdomHQ recorded Sep 29, 2026	201-500	311 contacts →
	Exact match “GI Outsourcing is a UK-based accountants outsourcing firm.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	BDO Solutions	Exact match	Moka, MauritiusHQ recorded Sep 29, 2026	501-1,000	310 contacts →
	Exact match “BDO Solutions is a Business Services & Outsourcing company located in Mauritius and forms part of the international BDO network, which extends across 166 countries and…” Recorded in the RevenueBase company graph · Sep 29, 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 preparation outsourcing companies”. 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 24,033 tax preparation outsourcing companies worldwide

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Tax preparation outsourcing companies worldwide at a glance

As of Sep 29, 2026

22.1%Verified-email coverage

8.3Average contacts per company

1-10Median size (employees)

1.0%Largest-city concentration · New York

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

17,453

11-50

5,305

51-200

763

201-500

110

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 preparation outsourcing companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “tax preparation outsourcing companies” 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 44,028 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 September 29, 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 preparation outsourcing companies by location

98 lists · largest first

Every Tax preparation outsourcing companies 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 preparation outsourcing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many tax preparation outsourcing companies are there worldwide?

RevenueBase identified 24,033 company matches for tax preparation outsourcing companies worldwide as of September 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 preparation outsourcing companies?

The United States leads with 10,626 companies, followed by Germany (2,044) and Brazil (1,193). Every tax preparation outsourcing companies list by country and city is linked on this page.

Which city has the most tax preparation outsourcing companies?

New York leads with 246 company records, followed by Sao Paulo (224) and Houston (205).

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 44,028 professional contacts with verified work emails tracked across these 24,033 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 September 29, 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.