Company lists · Data refreshed September 2026

Top 25 Tax preparation outsourcing services based in the United States

Name: Tax preparation outsourcing services 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 6,269 companies tracked

RevenueBase identified 6,269 company matches for tax preparation outsourcing services associated with the United States as of September 2026 and tracks 99,744 professional contacts across them, including 17,800 with verified work emails. New York is the largest hub.

This list covers company matches for tax preparation 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 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

6,269Companies

99,744Contacts tracked

17,800Verified emails

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The 25 largest tax preparation outsourcing services based in the United States

Ranked by team size

Top 25 of 6,269 company matches for tax preparation outsourcing services 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	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
4	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
5	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
6	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
7	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
8	Zenwork, INC	Exact match	Fayetteville, AR, United StatesHQ recorded Sep 29, 2026	51-200	206 contacts →
	Exact match “Zenwork, through its Tax1099 and Compliancely brands, is a fast-growing digital tax compliance and regulatory reporting technology company, with 10+ years of experience powering…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9	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
10	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
11	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
12	Taxwell	Exact match	Franklin, NC, United StatesHQ recorded Sep 29, 2026	1,001-5,000	136 contacts →
	Exact match “Taxwell is a leading digital tax filing platform formed in 2022 from the combination of Drake Software® and TaxAct®.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	Crystalvoxx LLC Accounting Services	Exact match	Dallas, TX, United StatesHQ recorded Sep 29, 2026	51-200	108 contacts →
	Exact match “CrystalVoxx offers a wide range of accounting and payroll services to suit diverse customer needs [Accounting & Payroll, EMR Integrated Transcription, Revenue Cycle Management,].” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	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
15	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
16	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
17	Taxfyle	Exact match	Coconut Grove, FL, United StatesHQ recorded Sep 29, 2026	51-200	91 contacts →
	Exact match “Tickmark’s flagship application, Taxfyle, was launched in 2015 as the “easiest way to file your taxes”.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	George Dimov, CPA	Exact match	New York, NY, United StatesHQ recorded Sep 29, 2026	11-50	90 contacts →
	Exact match “About us- United States Certified Public Accountant with IRS e-file - Registered IRS Tax Preparer with valid PTIN for all 50 states - 10+ years experience in accounting - 5 star…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19	Crescent TAX Filing, INC	Exact match	United StatesHQ recorded Sep 29, 2026	51-200	85 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 29, 2026 · View company records in RevenueBase
20	APRIL	Exact match	New York, NY, United StatesHQ recorded Sep 29, 2026	51-200	79 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 29, 2026 · View company records in RevenueBase
21	R&g Brenner TAX Accounting	Exact match	Valley Stream, NY, United StatesHQ recorded Sep 29, 2026	51-200	78 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 29, 2026 · View company records in RevenueBase
22	Colbert Ball TAX Service	Exact match	Houston, TX, United StatesHQ recorded Sep 29, 2026	11-50	77 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 29, 2026 · View company records in RevenueBase
23	Hintonburdick Cpas & Advisors	Exact match	St George, UT, United StatesHQ recorded Sep 29, 2026	51-200	64 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 29, 2026 · View company records in RevenueBase
24	Crsp Connect	Exact match	New York, NY, United StatesHQ recorded Sep 29, 2026	51-200	62 contacts →
	Exact match “Welcome to CRSP Connect, your trusted partner in outsourcing and offshore staffing solutions, tailored for Certified Public Accountants, Enrolled Agents, accounting firms, and…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	Santa Barbara TAX Products Group	Exact match	La Jolla, CA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	60 contacts →
	Exact match “Founded in 1991, Santa Barbara Tax Products Group (sbtpg) became a Green Dot company in 2014.” 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 services”. 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 6,269 tax preparation outsourcing services based in the United States

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Tax preparation outsourcing services based in the United States at a glance

As of Sep 29, 2026

17.8%Verified-email coverage

15.9Average contacts per company

1-10Median size (employees)

2.5%Largest-city concentration · New York

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

4,971

11-50

1,012

51-200

176

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 6,269 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 preparation 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 17,800 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 services 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 preparation outsourcing services”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 6,269 company matches for tax preparation 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 preparation outsourcing services?

New York leads with 156 company records, followed by Houston (144) and Miami (75).

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 17,800 professional contacts with verified work emails tracked across these 6,269 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.