Company lists · Data refreshed September 2026
Top 25 Pro bono services accounting firms based in the United States
RevenueBase identified 537 pro bono services accounting firms headquartered in the United States as of September 2026 and tracks 5,270 professional contacts across them, including 2,425 with verified work emails and 2,369 with mobile numbers. New York is the largest hub.
This list covers pro bono services accounting 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 5, 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 pro bono services accounting firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 775 contacts → | ||||
Partial evidence “THE NONPROFIT ACCOUNTING SPECIALISTS.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 151 contacts → | ||||
Indirect evidence “Lumsden McCormick CPA is located in the newly renovated Cyclorama Building in downtown Buffalo.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 142 contacts → | ||||
Indirect evidence “Established in 1958, Legal Aid Center of Southern Nevada is a private, non-profit, 501(c)(3) organization that ensures equal access to justice through free legal advice and…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 115 contacts → | ||||
Partial evidence “Accounting Aid Society - Growing an Economy That Works for Everyone Accounting Aid Society (AAS) is a nonprofit organization that offers free tax help and counseling; financial…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 102 contacts → | ||||
Indirect evidence “We offer a multitude of services ranging from traditional compilations, audits, reviews and tax returns, to other specialties, such as personal financial planning, retirement plan…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 91 contacts → | ||||
Indirect evidence “For more than 60 years, Armstrong, Backus & Co.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 87 contacts → | ||||
Partial evidence “Top accounting firm Raffa, P.C.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 81 contacts → | ||||
Partial evidence “Accounting, auditing and tax services to public companies, non-public companies and their owners, not-for-profits and employee benefit plans” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 78 contacts → | ||||
Indirect evidence “Quality service through our commitment to staff and clients.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 78 contacts → | ||||
Indirect 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 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 75 contacts → | ||||
Partial evidence “Fasten Halberstam LLP is a full service accounting firm offering a broad range of services for a diversified clientele representing a variety of industries.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 61 contacts → | ||||
Partial evidence “We provide accounting, tax, audit and business consulting services to clients both nationally and locally from our home in Arlington, Texas, in the Dallas-Fort Worth Metroplex.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 53 contacts → | ||||
Partial evidence “One of the largest local public accounting firms in Houston, Mohle Adams has provided professional counsel to Texas companies and residents to help them achieve their business and…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 52 contacts → | ||||
Indirect evidence “Mission: At Nathan Wechsler & Company, P.A.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 51 contacts → | ||||
Partial evidence “Han Group is a public accounting firm committed to serving the nonprofit community by providing unparalleled expertise in nonprofit Audits & Assurance, Managed Accounting, Tax…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 51 contacts → | ||||
Partial evidence “Founded in 1913, BT & Co, P.A.(BT & Co.) has grown to become one of the largest independent public accounting firms in Northeast Kansas.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 50 contacts → | ||||
Indirect evidence “Formed in 1987, Financial One was founded because of the need nonprofit organizations have for accurate and timely financial information.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 47 contacts → | ||||
Partial evidence “Barsz Gowie Amon & Fultz is a full-service accounting firm known for its expertise in business planning services and working with clients throughout the lifecycle of a business -…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 46 contacts → | ||||
Partial evidence “The certified public accounting firm of Campbell Rappold & Yurasits LLP located in Allentown, PA was established in 1926 and provides a full range of audit, accounting, tax…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 45 contacts → | ||||
Partial evidence “Smith Marion & Company, CPAs, an Inland Empire based accounting firm, specializes in auditing and review services for not-for-profits, governmental agencies and small to mid-sized…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 41 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 41 contacts → | ||||
Indirect evidence “Our service team has a broad based local and national experience in the industries of professional services, technology & software, health care, alternative energy, e-commerce, as…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 40 contacts → | ||||
Indirect evidence “At Stancil, we understand that every client is unique.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 38 contacts → | ||||
Partial evidence “As one of the leading full service accounting firms in the state of Georgia, our Atlanta and Athens teams combine expertise and experience to assure that every client receives the…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 37 contacts → | ||||
Strong evidence “SOAR strengthens nonprofits through collaborative, pro bono consulting that builds organizational capacity and deepens community impact while fostering an enriching learning…” Source: RevenueBase Database · checked Sep 5, 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: pro bono services accounting 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 pro bono services accounting firms.
- Partial evidence
- Its own public description names part of pro bono services accounting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name pro bono services accounting 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 537 pro bono services accounting firms based in the United States
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Pro bono services accounting firms based in the United States at a glance
As of Sep 5, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
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 pro bono services accounting 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 “pro bono services accounting 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 pro bono services accounting 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 pro bono services accounting 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, 2,425 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 5, 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.
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 pro bono services accounting 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 pro bono services accounting firms are there based in the United States?
RevenueBase identified 537 pro bono services accounting 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?
Your Part-Time Controller, LLC, headquartered in Philadelphia, tops this list with the largest team on record.
Which city has the most pro bono services accounting firms?
New York leads with 15 headquartered companies, followed by Houston (10) and Atlanta (8).
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 2,425 verified decision-maker contacts tracked across these 537 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 5, 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 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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