Company lists · Data refreshed September 2026

Top 25 Tax compliance outsourcing companies based in the United States

RevenueBase identified 2,942 company matches for tax compliance outsourcing companies associated with the United States as of September 2026 and tracks 87,119 professional contacts across them, including 13,945 with verified work emails. Houston is the largest hub.

This list covers company matches for tax compliance 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
2,942Companies
87,119Contacts tracked
13,945Verified emails
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The 25 largest tax compliance outsourcing companies based in the United States

Ranked by team size
Top 25 of 2,942 company matches for tax compliance 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchKansas City, MO, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
2Exact matchDallas, TX, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
3Exact matchExton, PA, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
4Exact matchSterling, VA, United StatesHQ recorded Sep 29, 2026201-500347 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
5Exact matchHouston, TX, United StatesHQ recorded Sep 29, 2026501-1,000269 contacts →

Exact match

“Growth exposes financial weakness.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6Exact matchFayetteville, AR, United StatesHQ recorded Sep 29, 202651-200206 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
7Exact matchDallas, TX, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
8Exact matchFranklin, NC, United StatesHQ recorded Sep 29, 20261,001-5,000136 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
9Exact matchPlano, TX, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
10Exact matchUnited StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
11Exact matchValley Stream, NY, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
12Exact matchHouston, TX, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
13Exact matchNew York, NY, United StatesHQ recorded Sep 29, 202611-5074 contacts →

Exact match

“Zamp provides real sales tax relief, not just software-we completely handle your sales tax compliance so you don't have to.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14Exact matchSunrise, FL, United StatesHQ recorded Sep 29, 202651-20070 contacts →

Exact match

“Neil Jesani Tax Advisors, Inc.(NJA) provides a full suite of tax, compliance, accounting, resolution and advisory services, drawing on extensive industry knowledge to serve high…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15Exact matchWashington, DC, United StatesHQ recorded Sep 29, 202611-5055 contacts →

Exact match

“Anybill is the leading provider of tax payment services, focusing exclusively on automating tax payments for our clients and partners.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16Exact matchWashington, DC, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
17Exact matchNy, United StatesHQ recorded Sep 29, 202651-20053 contacts →

Exact match

“Tax Preparation for U.S.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18Exact matchGrandville, MI, United StatesHQ recorded Sep 29, 202611-5050 contacts →

Exact match

“Greenback makes life better for Americans living abroad and aims to take away the anxiety and hassle of helping US expats become and stay compliant with their US taxes while…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19Exact matchKnoxville, TN, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
20Exact matchColumbus, OH, United StatesHQ recorded Sep 29, 202651-20045 contacts →

Exact match

“Clarus Partners, a Richey May company, provides specialized indirect tax compliance and advisory services to businesses across a wide range of industries.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21Exact matchKaty, TX, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
22Exact matchDallas, TX, United StatesHQ recorded Sep 29, 202651-20042 contacts →

Exact match

“At IOOGO, we specialize in simplifying financial tasks for individuals and businesses of all sizes.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact matchGlendale, CA, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
24Exact matchSaint Louis Park, MN, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
25Exact matchLakewood, CO, United StatesHQ recorded Sep 29, 202611-5037 contacts →

Exact match

“We're saving your spot!”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 25 of 2,942 tax compliance outsourcing companies based in the United States

See the full list, filter by size, metro and specialty, and access 13,945 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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

As of Sep 29, 2026
16.0%Verified-email coverage
29.6Average contacts per company
1-10Median size (employees)
2.6%Largest-city concentration · Houston
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
2,348
11-50
468
51-200
68
201-500
12
501-1,000
4
1,001-5,000
3
5,001-10,000
3
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 2,942 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 compliance 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 13,945 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.

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

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

RevenueBase identified 2,942 company matches for tax compliance 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 compliance outsourcing companies?

Houston leads with 76 company records, followed by New York (76) and Miami (43).

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 13,945 professional contacts with verified work emails tracked across these 2,942 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.