Company lists · Data refreshed September 2026

Top 25 Pro bono tax firms worldwide

RevenueBase identified 620 company matches for pro bono tax firms worldwide as of September 2026 and tracks 70,617 professional contacts across them, including 7,549 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for pro bono tax 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 20, 2026. Country and city lists for pro bono tax 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 20, 2026 How this list was built
620Companies
70,617Contacts tracked
7,549Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest pro bono tax firms worldwide

Ranked by team size
Top 25 of 620 company matches for pro bono tax firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchKansas City, MO, United StatesHQ recorded Sep 20, 202610001+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 20, 2026 · View company records in RevenueBase
2Exact matchHurst, TX, United StatesHQ recorded Sep 20, 2026n/a6,260 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 20, 2026 · View company records in RevenueBase
3Exact matchUnited StatesHQ recorded Sep 20, 202651-200175 contacts →

Exact match

“Background TaxHawk, Inc.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4Exact matchLas Vegas, NV, United StatesHQ recorded Sep 20, 202651-200142 contacts →

Exact match

“Established in 1958, Legal Aid Center of Southern Nevada is a private, non-profit, 501(c)(3) organization that ensures equal access to justice through free legal advice and…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5Exact matchBronx, NY, United StatesHQ recorded Sep 20, 202611-50122 contacts →

Exact match

“Could you live on less than a year?”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6Exact matchDetroit, MI, United StatesHQ recorded Sep 20, 202611-50115 contacts →

Exact match

“Accounting Aid Society - Growing an Economy That Works for Everyone Accounting Aid Society (AAS) is a nonprofit organization that offers free tax help and counseling; financial…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7Exact matchPhiladelphia, PA, United StatesHQ recorded Sep 20, 202611-50101 contacts →

Exact match

“The Campaign for Working Families, Inc.(CWF) is a 501(c)(3) non-profit organization committed to helping working families and individuals achieve economic empowerment by providing…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8Exact matchHouston, TX, United StatesHQ recorded Sep 20, 202611-5077 contacts →

Exact match

“Colbert/Ball Tax Service understands that whenever a customer visits their location for service, the client will be immediately assisted by a trained professional.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9Exact matchChicago, IL, United StatesHQ recorded Sep 20, 202611-5049 contacts →

Exact match

“At Ladder Up, we believe hard work and hardship shouldn’t go together.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10Exact matchUnited StatesHQ recorded Sep 20, 202611-5048 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11Exact matchClifton, NJ, United StatesHQ recorded Sep 20, 202611-5032 contacts →

Exact match

“For many years PRECISION ACCOUNTING has been helping individuals, families and small businesses in the community prepare their taxes.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12Exact matchMiami, FL, United StatesHQ recorded Sep 20, 202651-20030 contacts →

Exact match

“Since 1949, Miami-Dade County Legal Aid has been providing free civil legal services to qualifying low-income residents of Miami-Dade County.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13Exact matchSan Francisco, CA, United StatesHQ recorded Sep 20, 20261-1028 contacts →

Exact match

“Through skilled volunteers, Tax-Aid provides free year-round tax services to strengthen our San Francisco Bay Area community.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14Exact matchPortland, OR, United StatesHQ recorded Sep 20, 202611-5028 contacts →

Exact match

“CASH (Creating Assets, Savings and Hope) Oregon is a program of Metropolitan Family Service committed to improving the financial health of low income working families and…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 20, 20261-1025 contacts →

Exact match

“We know tax can be complicated, but we’re here to make it less confusing.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16Exact matchDenver, CO, United StatesHQ recorded Sep 20, 20261-1015 contacts →

Exact match

“The mission of the Denver Asset Building Coalition (DABC) is to provide free tax preparation, financial education, and financial services through accessible sites in Denver to…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17Exact matchNew York City, NY, United StatesHQ recorded Sep 20, 20261-1013 contacts →

Exact match

“Community Tax Aid, Inc.(CTA) is an all-volunteer, non-profit, tax-exempt organization (501(c)(3)) that has been preparing tax returns FREE for low-income individuals and families…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18Exact matchConway, United StatesHQ recorded Sep 20, 20261-1013 contacts →

Exact match

“ARKANSAS ASSET BUILDERS is a nonprofit organization based on Conway, Arkansas, that empowers our hardworking neighbors to flourish economically by providing access to free tax…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19Exact matchGroningen, NetherlandsHQ recorded Sep 20, 202611-5013 contacts →

Exact match

“De Stichting Belastingwinkel Groningen is in 1987 opgericht om mensen te helpen bij het invullen van hun belastingaangifte.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20Exact matchSunset Hills, MO, United StatesHQ recorded Sep 20, 20261-1011 contacts →

Exact match

“Experienced, Friendly and Affordable Tax Preparation with convenient locations in and around St.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21Exact matchYonkers, NY, United StatesHQ recorded Sep 20, 20261-1011 contacts →

Exact match

“J.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22Exact matchWilliamsport, PA, United StatesHQ recorded Sep 20, 20261-1010 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23Exact matchSan Diego, United StatesHQ recorded Sep 20, 202611-508 contacts →

Exact match

“Services include: Income Tax Preparation for individuals and businesses, for Public Charities, Trade Associations and other Not-for-Profit entities and for Private Foundations…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24Exact matchHays, KS, United StatesHQ recorded Sep 20, 20261-108 contacts →

Exact match

“Call us for all your income tax preparation services and bookkeeping needs.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25Exact matchRichmond, VA, United StatesHQ recorded Sep 20, 20261-108 contacts →

Exact match

“The Community Tax Law Project (CTLP) ensures the fairness and integrity of the tax system by providing free legal representation to low-income Virginia taxpayers in tax disputes…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

Showing 25 of 620 pro bono tax firms worldwide

See the full list, filter by size, metro and specialty, and access 7,549 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Pro bono tax firms worldwide at a glance

As of Sep 20, 2026
10.7%Verified-email coverage
113.9Average contacts per company
1-10Median size (employees)
1.9%Largest-city concentration · Houston
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
470
11-50
114
51-200
20
201-500
6
501-1,000
2
10001+
2

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 pro bono tax firms are linked below.
What qualifies
Company records worldwide whose business descriptions match “pro bono tax 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 7,549 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 September 20, 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.

Pro bono tax firms by location

1 lists · largest first

Every Pro bono tax firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 “pro bono tax firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many pro bono tax firms are there worldwide?

RevenueBase identified 620 company matches for pro bono tax 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 pro bono tax firms?

The United States leads with 482 companies. Every pro bono tax firms list by country and city is linked on this page.

Which city has the most pro bono tax firms?

Houston leads with 12 company records, followed by Los Angeles (9) and Brooklyn (7).

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 7,549 professional contacts with verified work emails tracked across these 620 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 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 620 pro bono tax firms worldwide. Start with a free account, no credit card.

Download this list →

Related lists

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.