Accounting and Tax Firms Licensing Data to AI

An accounting or tax firm can license some of its records to AI companies, but anything built on a client's tax return needs that taxpayer's written consent first, and the one accounting-specific buyer listing asks for exactly those returns and workpapers. In the United States, 26 U.S.C. 7216 and 26 CFR 301.7216-3 set the consent rule, and 26 CFR 301.7216-2(o)(2) bars a preparer from selling a statistical compilation of return information except with the sale of the business (eCFR as of 2026-10-01).

Mercor states a deal range of USD 25,000 to 865,000 for its Accounting & Tax Firm listing, "depends on client count and seasons" (checked 2026-11-09, re-read 2026-11-10). No signed accounting firm deal is disclosed, so every figure on this page is a buyer's own claim. Intermediaries such as Data Licensing Advisors, Marin Data and Regulr introduce or advise and do not acquire data, which keeps them apart from buyers in the table below. Tax files are among the most restricted records in AI training data licensing.

How we source, date and check every figure is set out in how we source, date and check every figure. Buyer terms are the buyers' own statements with the date we checked them.

What AI Buyers and Intermediaries Ask Accounting and Tax Firms For

Ten programs and intermediaries name accounting, tax or finance records on their own pages, and they split into buyers that want client returns with workpapers, buyers that want the firm's own finance workflows, and intermediaries, two of which keep accounting files out.

This table compares what each party states about accounting and finance records, as of 2026-11-10. Values are each party's own statement, checked 2026-11-09 unless marked.

B = buyer or licensee program; I = intermediary that introduces or advises and does not acquire data. "Not stated" does not mean allowed.

Mercor is the only party with an accounting-specific listing, and the tools it names are the listing's own list, not a statement that those vendors permit licensing.

Client Returns and Workpapers Versus the Firm's Own Operating Records

Two kinds of accounting firm records reach buyers: client returns, workpapers and source documents, which carry the client's tax return information, and the firm's own reconciliations, procedures and process documents. Mercor asks for the first kind and lists blank forms, templates and non-US returns as not a fit, while micro1 names finance SOPs and reconciliations (checked 2026-11-09).

Under 17 U.S.C. 201(b) and 101, an employer owns works its employees make within the scope of employment unless a signed written instrument says otherwise. A rights audit separates what the firm owns from what it holds for clients.

The firm's own records still quote client figures, so they go through the same consent screen. Whether bookkeeping, audit or advisory files for clients with no return fall under the consent rule is not settled by the sources used here, so the engagement terms and professional rules decide.

Client Ledgers Kept in Accounting Software and Its Platform Terms

Client ledgers usually sit in accounting software whose own terms limit what a firm may do with data taken from it. Intuit's QuickBooks Online terms bar AI or machine learning training using information derived from the platform without authorization, and Xero's terms (clause 56, Xero Limited) bar repackaging, reselling or sublicensing data accessed through its services (both checked 2026-11-09).

These terms bind the account holder, which may be the client rather than the firm. The data-type view is covered under accounting, ERP and financial records for AI training.

Taxpayer Consent Comes Before Any License of Return Files

A US tax return preparer may not disclose or use a client's return information for anything other than preparing the return without that taxpayer's written, knowing and voluntary consent. Return information includes name, address, identifying number and derived information (26 CFR 301.7216-1). A consent under 26 CFR 301.7216-3 has five elements:

• it is signed and dated by the taxpayer;
• it names the preparer and the taxpayer;
• it states the purpose of the disclosure or use;
• it names the recipients;
• it describes the information covered.

Knowing or reckless disclosure is a misdemeanor under 26 U.S.C. 7216(a), with a fine of up to USD 1,000 (USD 100,000 where 6713(b) applies) or up to 1 year in prison, or both, in force as of 2026-11-10. The civil penalty under 26 U.S.C. 6713(a) is USD 250 per disclosure, capped at USD 10,000 per calendar year, in force as of 2026-11-10. The default consent duration is one year where the form states none (eCFR as of 2026-11-05); the instrument is analyzed under IRC Section 7216 and tax preparers.

Conditioning services on consent makes the consent involuntary, so a firm cannot make it a condition of the engagement.

Anonymized Returns, Compilations and the Gap in Mercor's Listing

Mercor's listing asks for client documents that can be anonymized for licensing, while the regulation bars a preparer from selling a statistical compilation of return information except with the sale of the business.

26 CFR 301.7216-2(o)(2) bars selling or exchanging a statistical compilation for value, in whole or in part (eCFR as of 2026-10-01), and 301.7216-2(o) allows no aggregate figure drawn from fewer than 10 returns (eCFR as of 2026-11-05). Information the preparer derives from a return stays return information under 301.7216-1, so anonymizing does not by itself remove the rule.

The regulation, not the listing, decides. The listing does not say whether Mercor expects client consent, so the firm asks the buyer in writing how it treats consent and compilations, and starts from company data that cannot be licensed without consent.

Tax Preparers as Financial Institutions: FTC Safeguards and GLBA

The FTC's Safeguards Rule lists tax preparation services among financial institutions, which brings a tax firm's client data under the Gramm-Leach-Bliley Act as well as IRC 7216 (16 CFR 314.2, in force). The Act requires notice and an opt-out before nonpublic personal information goes to a non-affiliated third party (15 U.S.C. 6802(b)(1)).

Regulation P counts lists derived from personally identifiable financial information as nonpublic personal information (12 CFR 1016.3).

Germany: Auditors and Tax Consultants Under StGB Section 203

German criminal law makes auditors, certified public accountants and tax consultants keep client secrets, so a German firm cannot license client files to an AI buyer without the client's authorization. Section 203 of the Strafgesetzbuch carries imprisonment of up to one year or a fine.

Section 203(6) raises this to up to two years or a fine where the offender acts for remuneration or with intent to enrich, which describes a paid license. Under section 205(1), the offense is prosecuted only upon request.

Professional Conduct Rules and the IRS Alert on AI in Tax Practice

Professional conduct rules for CPAs and enrolled practitioners sit alongside the statutes, and the IRS Office of Professional Responsibility addressed AI use in federal tax practice in June 2026. Its Alert 2026-19, "Introductory Guidelines for Responsible AI Use in Federal Tax Practice", issued 2026-06-24, cites IRC 6713 and 7216(a). The AICPA Code, Treasury Circular 230 and state board rules are not summarized here, so a firm reads them before any license.

Firm Size Thresholds and Stated Ranges for Accounting Firms

Some programs set lower headcount floors for accounting firms than their general floors, but each program states its own number and Mode states three different ones.

This table compares the headcount and other conditions each party states, as of 2026-11-10, checked 2026-11-09 unless marked.

Where a program's own pages differ, all values are shown (Handshake AI, Mode).

Mercor's range of USD 25,000 to 865,000 is the only accounting-specific range, stated as "depends on client count and seasons" (checked 2026-11-09). Its referral base for the same listing is USD 70,000 plus a USD 10,000 fast-signing booster, which exceeds its own USD 25,000 deal minimum, one of 8 of 25 listings where that holds. Program terms and incidents are on the Mercor data buyer profile.

No signed, disclosed accounting firm deal is on record, so all figures here are a buyer's claim with its check date, not a price paid.

Benefits, Risks, Downsides and Alternatives for an Accounting Firm

Licensing firm records can bring income from files a firm already keeps, but each client's consent is the price of entry, and not licensing is a valid outcome.

Benefits

• Income from files already kept: Mercor states USD 25,000 to 865,000 for its listing (checked 2026-11-09).
• Mercor states it covers extraction, anonymization and transfer costs (checked 2026-11-09).
• The firm's own workflows are wanted too, not only client files (micro1, checked 2026-11-09).

Risks

• Criminal and civil penalties under 26 U.S.C. 7216(a) and 6713(a) for disclosure without consent.
• The compilation bar in 26 CFR 301.7216-2(o)(2) may reach anonymized sets, since derived information stays return information.
• GLBA notice and opt-out duties for a financial institution.
• A buyer's own security incident: unauthorized access via compromised LiteLLM versions at Mercor, with breach dates 2026-03-24 and 2026-03-30 (California Attorney General).

Downsides

• micro1's Data License Master Terms (last updated 2026-11-08) grant a worldwide, nonexclusive, irrevocable, perpetual license; the data is deleted within 120 days of delivery, but models and other Licensee Materials need not be deleted or retrained.
• Consent is collected client by client, with a one-year default duration.
• Returns filed outside the United States are not a fit for Mercor's listing.

Alternatives

• License only the firm's own process records.
• Ask clients for consent at the next engagement, never as a condition of service.
• Wait for a written offer from more than one program.
• Not licensing at all, and other alternatives to selling data to AI labs.

Where Accounting Firm Licensing Meets the Seller Path, the Law and Other Industries

Accounting firms face the general data licensing rules as well as their sector rules, and the US overview groups the federal statutes in one place. The federal and state layers are set out under AI training data law in the United States.

Accounting is one sector in data licensing by industry. Parallel client confidentiality rules apply to law firms licensing data, medical practices licensing data and consulting firms licensing client deliverables.

The seller's own books and taxes are covered on the pages on accounting for data licensing revenue and tax on data licensing income.

1. Decide whether to license at all.
2. Check data sale readiness.
3. Plan PII removal and de-identification for consented files.
4. Compare programs when choosing a buyer for your data.
5. Evaluate each written offer for your data.
6. Read the grant and deletion clauses of AI data licensing agreements.

This page is information, not legal or tax advice.

Buyer, Intermediary, Law and System Pages Named on This Page

Each program, rule and system above has or will have its own page with dated terms and sources.

• Buyers and intermediaries: AfterQuery, company data partnership programs, Data Licensing Advisors, Handshake AI data buyer profile, HUMXN, Marin Data, micro1 data buyer profile, Mode, Regulr.
• Law: GDPR and AI training data for EU firms, GLBA and financial customer data, rules for licensing data in Germany.
• Systems and cases: QuickBooks data export, Xero data export, Mercor data breach class actions.

Frequently Asked Questions

Can an accounting firm sell client tax returns to AI companies?

Only with each taxpayer's signed, written and voluntary consent under 26 CFR 301.7216-3, and a statistical compilation of returns cannot be sold except with the sale of the business.

How much do AI companies pay accounting firms for data?

No signed accounting firm deal has been disclosed; Mercor states USD 25,000 to 865,000 for its Accounting & Tax Firm listing, checked 2026-11-09, depending on client count and filing seasons.

Valuation methods are set out under what company data is worth to AI companies.

Can accountants be paid for introducing clients to data buyers?

Some programs pay referral fees, such as the USD 70,000 base Mercor states for this listing, checked 2026-11-09, but whether an accountant may accept one depends on professional ethics and disclosure rules.

The ethics and disclosure rules are covered under referral fees for advisers.