Company lists · Data refreshed September 2026

Top 25 Tax outsourcing services based in the United States

RevenueBase identified 1,980 company matches for tax outsourcing services associated with the United States as of September 2026 and tracks 84,922 professional contacts across them, including 14,175 with verified work emails. Houston is the largest hub.

This list covers company matches for tax outsourcing services associated with the United States, 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 21, 2026.

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 21, 2026 How this list was built
1,980Companies
84,922Contacts tracked
14,175Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest tax outsourcing services based in the United States

Ranked by team size
Top 25 of 1,980 company matches for tax outsourcing services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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 21, 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 21, 2026 · View company records in RevenueBase
2Exact matchDallas, TX, United StatesHQ recorded Sep 21, 20265,001-10,0006,089 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 21, 2026 · View company records in RevenueBase
3Exact matchFort Wayne, IN, United StatesHQ recorded Sep 21, 2026501-1,000861 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 · Sep 21, 2026 · View company records in RevenueBase
4Exact matchExton, PA, United StatesHQ recorded Sep 21, 2026501-1,000364 contacts →

Exact match

“Cohesive is a leading solutions provider and systems integrator for IBM Maximo.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchCoral Springs, FL, United StatesHQ recorded Sep 21, 2026201-500320 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 21, 2026 · View company records in RevenueBase
6Exact matchWayne, PA, United StatesHQ recorded Sep 21, 2026201-500281 contacts →

Exact match

“GTM is a leading provider of corporate tax services.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchHouston, TX, United StatesHQ recorded Sep 21, 2026501-1,000269 contacts →

Exact match

“Growth exposes financial weakness.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchSterling, VA, United StatesHQ recorded Sep 21, 2026201-500216 contacts →

Exact match

“AOTAX is a leading U.S.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchDallas, TX, United StatesHQ recorded Sep 21, 2026201-500168 contacts →

Exact match

“Infinity Globus, a Springline company, is a leading accounting outsourcing firm with over two decades of industry experience, providing tailored taxation and accounting services…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchLathrop, CA, United StatesHQ recorded Sep 21, 202651-200136 contacts →

Exact match

“CrossLink Professional Tax Solutions (CPTS) is a leading provider of professional tax software solutions for professional tax preparers across the United States.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchPlano, TX, United StatesHQ recorded Sep 21, 202651-200100 contacts →

Exact match

“At MyTaxFiler, we offer more than just tax preparation-we provide peace of mind.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchUnited StatesHQ recorded Sep 21, 202651-20085 contacts →

Exact match

“Crescent Tax Filing, Inc- Your Trusted Partner in US #Tax Services for Over 7 Years Welcome to Crescent Tax Filing, Inc, your go-to destination for comprehensive US Tax…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchNew York, NY, United StatesHQ recorded Sep 21, 202651-20079 contacts →

Exact match

“april partners with wealth management firms, banks, and SMB platforms to embed tax filing, planning, and insights directly into the financial platforms people use every day to…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchValley Stream, NY, United StatesHQ recorded Sep 21, 202651-20078 contacts →

Exact match

“Tax Consulting Services Individual Tax Return Preparation * Electronic Filing * Refund Anticipation Loans * Same Day Refund Anticipation Loans * Refund Anticipation Checks * State…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchHouston, TX, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
16Exact matchSt George, UT, United StatesHQ recorded Sep 21, 202651-20064 contacts →

Exact match

“As the area’s largest full-service CPA firm, we are uniquely qualified to handle the most challenging tax issues as well as prepare simple returns in a cost-effective manner.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchNew York, NY, United StatesHQ recorded Sep 21, 2026201-50058 contacts →

Exact match

“We take the complication out of any business.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchColumbus, OH, United StatesHQ recorded Sep 21, 202611-5056 contacts →

Exact match

“Founded by tax experts and backed by proprietary technology, Arvo is the only holistic approach that brings together the ability to develop and document a tax strategy with tax…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchWashington, DC, United StatesHQ recorded Sep 21, 202651-20054 contacts →

Exact match

“Think, LLP is a national professional tax services firm that consists of former Big-4 partners from the national tax practices, attorneys, CPAs, engineers, former IRS technicians…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchKnoxville, TN, United StatesHQ recorded Sep 21, 202651-20048 contacts →

Exact match

“At The Accounting Lab, we are dedicated to helping individuals and businesses optimize their financial success through effective tax minimization strategies.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchKaty, TX, United StatesHQ recorded Sep 21, 20261,001-5,00042 contacts →

Exact match

“RightTaxMate is trusted partner for individual and businesses seeking expert financial guidance and support.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchGlendale, CA, United StatesHQ recorded Sep 21, 202651-20040 contacts →

Exact match

“With over 50 years of experience, Robert Hall & Associates is your trusted partner for tax preparation and consulting.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchSaint Louis Park, MN, United StatesHQ recorded Sep 21, 202611-5040 contacts →

Exact match

“Myslajek Kemp & Spencer, Ltd.(MKS) delivers innovative solutions with the highest level of client satisfaction in the profession.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchIrvine, CA, United StatesHQ recorded Sep 21, 202651-20037 contacts →

Exact match

“Make sure you get every dollar back from the government.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchHouston, TX, United StatesHQ recorded Sep 21, 202651-20036 contacts →

Exact match

“Murphy Collective is a leading Tax,Accounting and Business Process Outsourcing (BPO) company with headquarters in the United States and a secondary locations in the United Kingdom…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 25 of 1,980 tax outsourcing services based in the United States

See the full list, filter by size, metro and specialty, and access 14,175 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Tax outsourcing services based in the United States at a glance

As of Sep 21, 2026
16.7%Verified-email coverage
42.9Average contacts per company
1-10Median size (employees)
2.7%Largest-city concentration · Houston
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
1,552
11-50
318
51-200
68
201-500
13
501-1,000
5
1,001-5,000
2
5,001-10,000
2
10001+
1

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,980 companies.

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.
What qualifies
Company records associated with the United States whose business descriptions match “tax outsourcing 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 14,175 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 21, 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.

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 outsourcing services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many tax outsourcing services are there based in the United States?

RevenueBase identified 1,980 company matches for tax outsourcing services associated with the United States 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 city has the most tax outsourcing services?

Houston leads with 54 company records, followed by New York (54) and Miami (32).

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 14,175 professional contacts with verified work emails tracked across these 1,980 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 21, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,980 tax outsourcing services based in the United States. 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.