Company lists · Data refreshed September 2026
Top 25 Employment tax compliance firms based in the United States
RevenueBase identified 1,550 employment tax compliance firms headquartered in the United States as of September 2026 and tracks 15,079 professional contacts across them, including 6,396 with verified work emails. New York is the largest hub.
This list covers employment tax compliance firms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.
The 25 largest employment tax compliance firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 3,543 contacts → | ||||
Indirect evidence “Gusto has been growing the small business economy for 15+ years.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 323 contacts → | ||||
Indirect evidence “Together Vistra + iiPay are building the world's most powerful payroll proposition.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 291 contacts → | ||||
Indirect evidence “Employers need a partner they can rely on to face today’s new challenges.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 276 contacts → | ||||
Partial evidence “From start-up to scale-up, SurePayroll online payroll, tax management, HR and benefits solutions give small business and household employers the freedom to succeed.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 269 contacts → | ||||
Indirect evidence “Growth exposes financial weakness.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 214 contacts → | ||||
Partial evidence “Synergi specializes in processing federal and state tax credits for employers across the United States and Puerto Rico.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 197 contacts → | ||||
Indirect evidence “Dominion Payroll is a leader in payroll and human resource solutions for clients nationwide.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 155 contacts → | ||||
Indirect evidence “Greenshades delivers purpose-built workforce management solutions for organizations where workforce complexity is the norm, not the exception.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 155 contacts → | ||||
Indirect evidence “ConnectPay empowers small businesses across America through hassle-free payroll processing.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 149 contacts → | ||||
Indirect evidence “Payroll Vault has Re-Defined Payroll Payroll Vault is a nationally leading vendor that is re-defining the payroll industry with advanced cloud-based technologies, the highest…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 147 contacts → | ||||
Indirect evidence “Anchored by subject matter experts, Thomas & Company is focused on helping employers save money and increase efficiency within the unemployment cost management, offboarding…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 126 contacts → | ||||
Indirect evidence “At Corporate Payroll Services, we relieve you of the burden of processing payroll.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 123 contacts → | ||||
Partial evidence “Avitus Group is a worldwide company that simplifies, strengthens and grows businesses by providing administrative support (Payroll, accounting, taxes, HR and much more.) When a…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 116 contacts → | ||||
Partial evidence “ERTC Express is a tax consulting firm providing expert assistance to small business clients around the Employee Retention Tax Credit.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 101 contacts → | ||||
Indirect evidence “Complete Payroll, HR Services, Insurance Services, Retirement Plan Services and Workforce Management Solutions.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 101 contacts → | ||||
Indirect evidence “When families hire a nanny, senior caregiver, housekeeper, personal assistant or other household employee to work in or around their home, they have specific federal, state and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 89 contacts → | ||||
Indirect evidence “Payroll and HR” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 87 contacts → | ||||
Strong evidence “Symmetry is the leading payroll tax compliance infrastructure for payroll providers, HR tech platforms and large employers.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 87 contacts → | ||||
Indirect evidence “GTM's success and client satisfaction are based on our industry-leading expertise and an extraordinary level of personal attention for each and every client.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 85 contacts → | ||||
Strong evidence “CorpNet, founded by attorney husband and wife team, Phil and Nellie Akalp, is the smartest way to start a business, register for payroll taxes, and maintain business compliance…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 84 contacts → | ||||
Partial evidence “Everything you need to pay your people, your payroll taxes and your workers' comp insurance made easy as pie.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 80 contacts → | ||||
Indirect evidence “For over 40 years, Execupay has been a leading provider of payroll and HR Solutions for both small and medium sized businesses covering payroll, time and labor management, talent…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 80 contacts → | ||||
Indirect evidence “Back in the early 2010s, Dave Fried and Danny Kline struck up a partnership.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 78 contacts → | ||||
Partial evidence “Tax Consulting Services Individual Tax Return Preparation * Electronic Filing * Refund Anticipation Loans * Same Day Refund Anticipation Loans * Refund Anticipation Checks * State…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 77 contacts → | ||||
Indirect evidence “BSI is a leading provider of U.S.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: employment tax compliance firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names employment tax compliance firms.
- Partial evidence
- Its own public description names part of employment tax compliance firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name employment tax compliance firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 1,550 employment tax compliance firms based in the United States
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Employment tax compliance firms based in the United States at a glance
As of Sep 19, 2026Companies by employee count
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 1,550 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among employment tax compliance firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “employment tax compliance firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names employment tax compliance firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among employment tax compliance firms, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 6,396 across the full list. 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 19, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Employment tax compliance firms by metro
- Employment tax compliance firms in New York44
- Employment tax compliance firms in Houston41
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names employment tax compliance firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many employment tax compliance firms are there based in the United States?
RevenueBase identified 1,550 employment tax compliance firms headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
GUSTO, headquartered in San Francisco, tops this list with the largest team on record.
Which city has the most employment tax compliance firms?
New York leads with 44 headquartered companies, followed by Houston (41) and Dallas (17).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 6,396 verified decision-maker contacts tracked across these 1,550 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.
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Employment tax compliance firms by geography
- Employment tax compliance firms based in Australia
- Employment tax compliance firms based in Austria
- Employment tax compliance firms based in Brazil
- Employment tax compliance firms based in Canada
- Employment tax compliance firms based in France
- Employment tax compliance firms based in Germany
- Employment tax compliance firms based in India
- Employment tax compliance firms based in Italy
- Employment tax compliance firms based in the Netherlands
- Employment tax compliance firms based in Poland
- Employment tax compliance firms based in South Africa
- Employment tax compliance firms based in the United Kingdom
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 Smart Search, 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.
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- Employment tax compliance firms based in Australia
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