Company lists · Data refreshed September 2026

Top 25 Tax preparation outsourcing firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 16,067 companies tracked

RevenueBase identified 16,067 company matches for tax preparation outsourcing firms worldwide as of September 2026 and tracks 165,853 professional contacts across them, including 30,953 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 firms 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 firms 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

16,067Companies

165,853Contacts tracked

30,953Verified emails

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The 25 largest tax preparation outsourcing firms worldwide

Ranked by team size

Top 25 of 16,067 company matches for tax preparation outsourcing firms 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	TOA Global	Exact match	Southport, AustraliaHQ recorded Sep 29, 2026	1,001-5,000	3,912 contacts →
	Exact match “Don’t wait until understaffing eats away at your productivity and client satisfaction.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	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
6	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
7	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
8	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
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	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
12	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
13	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
14	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
15	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
16	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
17	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
18	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
19	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
20	Grupo Conceito	Exact match	Lisbon, PortugalHQ recorded Sep 29, 2026	201-500	303 contacts →
	Exact match “Fundada em junho de 1982, a Conceito dedica-se à prestação de serviços de outsourcing nas áreas de Contabilidade, Fiscalidade, Consultoria, Processamento Salarial, Tesouraria e…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	Buchprufer Consultants LLP	Exact match	Calicut, IndiaHQ recorded Sep 29, 2026	201-500	294 contacts →
	Exact match “Founded in 2007, Buchprufer Consultants has grown into a trusted and reputed outsourcing partner delivering high-quality financial and professional services.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	Taxslayer	Exact match	Augusta, GA, IndiaHQ recorded Sep 29, 2026	201-500	289 contacts →
	Exact match “For 60 years, TaxSlayer has been empowering Americans to take control of their taxes with easy-to-use, reliable software backed by U.S-based support.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	Taxprime	Exact match	Jakarta Selatan, IndonesiaHQ recorded Sep 29, 2026	201-500	269 contacts →
	Exact match “TaxPrime is a Tax Consulting Firm, based in Jakarta, the Capital City of Indonesia.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	Mayatax	Exact match	Houston, TX, United StatesHQ recorded Sep 29, 2026	501-1,000	269 contacts →
	Exact match “Growth exposes financial weakness.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	FBC Farm And Small Business TAX Consultants	Exact match	Calgary, AB, CanadaHQ recorded Sep 29, 2026	201-500	260 contacts →
	Exact match “For more than 70 years, our focus has always been to bring financial peace of mind to our Canadian business owners.” 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 firms”. 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 16,067 tax preparation outsourcing firms worldwide

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Tax preparation outsourcing firms worldwide at a glance

As of Sep 29, 2026

18.7%Verified-email coverage

10.3Average contacts per company

1-10Median size (employees)

1.2%Largest-city concentration · New York

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11,564

11-50

3,556

51-200

556

201-500

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 firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “tax preparation outsourcing firms” 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 30,953 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 firms by location

60 lists · largest first

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

How many tax preparation outsourcing firms are there worldwide?

RevenueBase identified 16,067 company matches for tax preparation outsourcing firms 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 firms?

The United States leads with 7,633 companies, followed by Germany (1,357) and India (846). Every tax preparation outsourcing firms list by country and city is linked on this page.

Which city has the most tax preparation outsourcing firms?

New York leads with 186 company records, followed by Houston (168) and Sao Paulo (154).

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 30,953 professional contacts with verified work emails tracked across these 16,067 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.