Company lists · Data refreshed September 2026

Top 25 Tax accounting outsourcing companies based in the United States

Name: Tax accounting outsourcing companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 7,973 companies tracked

RevenueBase identified 7,973 company matches for tax accounting outsourcing companies associated with the United States as of September 2026 and tracks 110,709 professional contacts across them, including 23,963 with verified work emails. New York is the largest hub.

This list covers company matches for tax accounting outsourcing companies 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 29, 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 29, 2026 How this list was built

7,973Companies

110,709Contacts tracked

23,963Verified emails

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The 25 largest tax accounting outsourcing companies based in the United States

Ranked by team size

Top 25 of 7,973 company matches for tax accounting outsourcing companies based in the United States, 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	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
3	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
4	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
5	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
6	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
7	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
8	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
9	Squire	Exact match	Orem, UT, United StatesHQ recorded Sep 29, 2026	201-500	297 contacts →
	Exact match “Squire is a nationally recognized audit, tax, and business advisory firm serving clients across the U.S.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	GTM Global TAX Management	Exact match	Wayne, PA, United StatesHQ recorded Sep 29, 2026	201-500	281 contacts →
	Exact match “GTM is a leading provider of corporate tax services.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	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
12	TJT	Exact match	Raleigh, NC, United StatesHQ recorded Sep 29, 2026	201-500	231 contacts →
	Exact match “Thomas, Judy and Tucker, P.A.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	Porte Brown LLC	Exact match	Elk Grove Village, IL, United StatesHQ recorded Sep 29, 2026	51-200	191 contacts →
	Exact match “Porte Brown LLC is a full service accounting and consulting firm headquartered in the Chicago suburb of Elk Grove Village, Illinois.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	Infinity Globus, A Springline Company	Exact match	Dallas, TX, United StatesHQ recorded Sep 29, 2026	201-500	168 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 29, 2026 · View company records in RevenueBase
15	Geffen Mesher	Exact match	Portland, OR, United StatesHQ recorded Sep 29, 2026	51-200	160 contacts →
	Exact match “We’re a Portland-based accounting firm with a 90+ year legacy, and we’re continuing to grow and evolve every day.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	Mize Cpas INC	Exact match	Topeka, KS, United StatesHQ recorded Sep 29, 2026	1,001-5,000	146 contacts →
	Exact match “Mize CPAs is now part of Aprio, a Top 25 premier, full-service business advisory and accounting firm that’s passionate for what’s next.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	Konnect Books & Taxes- Virtual CFO & USA TAX Consultants	Exact match	New York, NY, United StatesHQ recorded Sep 29, 2026	51-200	145 contacts →
	Exact match “Konnect Books & Taxes, is an International Bookkeeping, Tax & Advisory firm, in the USA, with CPAs & Accountants, ready to help you take care of ALL your numbers.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	KWC Cpas	Exact match	Alexandria, VA, United StatesHQ recorded Sep 29, 2026	51-200	133 contacts →
	Exact match “KWC is a team of accountants and advisors all dedicated to the founding principle of providing Quality Personal Service.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19	Mcgill, Power, Bell & Associates, LLP	Exact match	Meadville, PA, United StatesHQ recorded Sep 29, 2026	51-200	121 contacts →
	Exact match “McGill, Power, Bell & Associates, LLP (“MPB”) is a public accounting firm with five Pennsylvania offices located in the cities of Erie, Franklin, Grove City, Meadville, and…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	Lavine, Lofgren, Morris & Engelberg, LLP	Exact match	La Jolla, CA, United StatesHQ recorded Sep 29, 2026	51-200	118 contacts →
	Exact match “Since 1985, we’ve built a firm where clients receive the highest quality of services, where our people play an important role as they grow professionally and where we as a firm…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	Flsv LLP	Exact match	Garden City, NY, United StatesHQ recorded Sep 29, 2026	51-200	109 contacts →
	Exact match “Frankel Loughran Starr & Vallone LLP (FLSV), a premier accounting, tax advisory and compliance firm focused primarily in the financial services industry, was formed in 1995 by…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	Bartlett, Pringle & Wolf, LLP	Exact match	Santa Barbara, CA, United StatesHQ recorded Sep 29, 2026	51-200	102 contacts →
	Exact match “Bartlett, Pringle & Wolf, LLP is the leading accounting and consulting firm on the Central Coast of California providing a collection of premium services to support your lifestyle.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	Mytaxfiler	Exact match	Plano, TX, United StatesHQ recorded Sep 29, 2026	51-200	100 contacts →
	Exact match “At MyTaxFiler, we offer more than just tax preparation-we provide peace of mind.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	Archer Lewis	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	501-1,000	94 contacts →
	Exact match “Archer Lewis is your local trusted advisor for accounting and tax services.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	Capactix Business Solutions	Exact match	New York, NY, United StatesHQ recorded Sep 29, 2026	51-200	92 contacts →
	Exact match “We are one of the leading offshore companies that offer the best in the industry staffing solutions to CPAs, accounting firms, and other companies.” 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 accounting 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 7,973 tax accounting outsourcing companies based in the United States

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Tax accounting outsourcing companies based in the United States at a glance

As of Sep 29, 2026

21.6%Verified-email coverage

13.9Average contacts per company

1-10Median size (employees)

2.8%Largest-city concentration · New York

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

6,149

11-50

1,474

51-200

226

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 7,973 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 accounting 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. 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 23,963 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 accounting outsourcing companies by metro

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

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

RevenueBase identified 7,973 company matches for tax accounting outsourcing companies 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 accounting outsourcing companies?

New York leads with 220 company records, followed by Houston (165) and Miami (94).

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 23,963 professional contacts with verified work emails tracked across these 7,973 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.