Stablecoin Reserve Audits: How the Checks Work

Last updated: November 7, 2026

Stablecoin reserve audits examine an issuer’s reported token supply and the backing assets at a stated time. They are sometimes called audits, but an engagement may instead be an examination or attestation, not an audit of the issuer’s financial statements. Its scope determines what the report addresses.

How stablecoin reserve audits work

An issuer provides an accountant with information about tokens outstanding and assets held to back them. The accountant examines management’s assertions and supporting evidence, then reports on them under the engagement’s criteria. Procedures depend on applicable rules and the report’s scope.

The basic comparison is whether eligible reserve assets cover the reported token liability. Under 12 U.S.C. § 5903, permitted U.S. payment stablecoin issuers must maintain identifiable reserves worth at least 1:1 against outstanding tokens. Eligible assets include cash and demand deposits, certain U.S. Treasury securities with maturities of 93 days or less, qualifying repurchase agreements, and government money-market funds invested only in permitted assets.

More than the headline total can matter: reserve composition, token count, valuation basis, custody arrangements and eligibility rules. Assets that do not meet applicable requirements may not count as eligible reserves.

What an accountant checks in a reserve report

Reserve reporting can cover the number of tokens issued or outstanding and the availability and value of backing assets. Readers should check which management assertions were examined, the date or period covered, and any qualifications or limitations in the report.

The AICPA’s 2025 Stablecoin Reporting Criteria provide a framework for presenting information about tokens issued and the availability of backing assets. On January 12, 2026, the AICPA announced an update adding criteria for evaluating controls over issuance, redemptions, reserve custody and vendor management over a specified period. These criteria address operational controls as well as reported balances.

Some rules call for testing on multiple dates. New York Department of Financial Services guidance requires monthly CPA examinations for covered dollar-backed stablecoins. It calls for testing management’s assertions as of the period’s last business day and at least one randomly selected business day during the period. Assertions include reserve value by asset class, token quantity, whether reserves fully back tokens and compliance with reserve conditions.

Reports may cover specific assertions without assessing every part of an issuer’s operations or financial position. Read the conclusion alongside the procedures, measurement date and stated limitations.

Why an attestation is not always a full audit

“Audit,” “attestation” and “examination” can refer to different engagements. A reserve examination addresses specified assertions about tokens and backing assets. A financial-statement audit covers an issuer’s financial statements under a separate scope.

Circle says Deloitte examines certain management assertions about total USDC in circulation monthly and publishes USDC attestation reports. Circle separately identifies Deloitte as its independent financial-statement auditor. These are separate engagements, not interchangeable reports.

Federal law also distinguishes monthly reserve reporting from an annual financial-statement audit for certain large permitted payment stablecoin issuers. The annual requirement applies to issuers with more than $50 billion in consolidated outstanding issuance that are not already subject to specified SEC reporting requirements. A monthly reserve examination does not mean the issuer’s entire business has been audited.

How often are reserves checked, and what does the date mean?

Reserve balances and token supply can change after a report’s measurement date. A month-end report describes the stated snapshot, not every later transaction. Check the measurement and publication dates, along with the reserve-composition details and accountant’s report.

The OCC’s final rule for supervised issuers takes effect January 18, 2027. It requires the monthly composition report to be published by noon on the last day of each month, using reserve information as of noon on the last day of the preceding month. The accountant’s examination report is published alongside it. As of November 6, 2026, the effective date is in the future.

The GENIUS Act calls for monthly public reports listing outstanding token supply and reserve amounts and categories, including the average tenor and geographic custody location of each category of reserve instruments. The OCC rule also requires reserves to be identifiable, segregated from the issuer’s other assets and held by the issuer or an eligible financial institution.

What stablecoin reserve audits cannot prove

A report provides evidence only about the claims tested and within its stated scope. It does not establish that every holder can redeem instantly in every circumstance. Nor does it remove issuer, custody, operational or regulatory risks, or rule out losses outside the examination’s scope. A stablecoin can trade away from its intended peg.

Look for the accountant’s conclusion, measurement date, asset categories, token figure, custody details and exclusions. A narrow scope or older snapshot provides less information about current backing than a timely report with clearly defined procedures.

Stablecoin reserve audits FAQ

What is a stablecoin reserve audit?

It is an independent examination of specified claims about a stablecoin’s outstanding supply and the assets intended to back it. The report describes what was examined and the date or period covered.

Does an attestation prove a stablecoin is fully backed?

It can provide evidence about stated backing at the measured time and within the engagement’s scope. It cannot establish future reserve levels, immediate redemption or protection from all risks.

How often are stablecoin reserves audited?

Frequency depends on the issuer and applicable rules. Some frameworks require monthly examinations and public reports. New York DFS guidance, for example, calls for monthly CPA examinations of covered dollar-backed stablecoins.

Is a reserve audit the same as a financial audit?

No. A reserve examination focuses on defined assertions about token supply and backing assets. A financial-statement audit evaluates the issuer’s financial statements in a separate engagement with a different scope.

Sources

• 12 U.S.C. § 5903: Requirements for issuing payment stablecoins (uscode.house.gov)
• Implementing the GENIUS Act for OCC-supervised stablecoin issuers, 91 FR 67000 (thefederalregister.org)
• AICPA Updates Criteria for Stablecoin Reporting to Address Controls Over Stablecoin Operations (www.aicpa-cima.com)

This article is for informational purposes only and does not constitute financial or investment advice. Cryptocurrencies are highly volatile; always do your own research before investing.