Tether Says It Will Be Audited By Big Four Accounting Firm—But Won't Say Which One

In brief

• Tether says it will undergo its first full audit by a Big Four firm, but hasn’t disclosed which one.
• The audit would verify reserves backing USDT, which the company claims total around $192 billion.
• Completing the audit could help Tether comply with U.S. rules under the GENIUS Act.

Tether, the world’s top stablecoin issuer, announced Tuesday it will soon make good on a yearslong promise to audit its sprawling stablecoin reserves—but won’t yet disclose which firm will actually do the job. Tether claims to hold some $192 billion in assets in reserve around the world to back the value of its dollar-pegged stablecoin, USDT. The majority of those reserves are purported to be held in U.S. Treasuries. But, ever since its founding in 2014, the company has refrained from undergoing an audit from a Big Four accounting firm to confirm the accuracy of its reserve claims. It has instead relied on attestations reviewed by an Italian accounting firm that has never directly examined Tether’s accounts and holdings.

Today, the company announced it has signed a deal with a Big Four accounting firm to “complete its first full independent financial statement audit.” But Tether did not state which firm, and a Tether representative did not immediately reply to Decrypt’s request for comment on the matter.  The Big Four accounting firms—Deloitte, PriceWaterhouseCoopers, Ernst & Young, and KPMG—are the world’s largest auditors, and are widely regarded as providing a certain standard of rigor and transparency when engaged by major corporations. Tether’s CEO, Paolo Ardoino, told Decrypt last year he planned on putting Tether through a Big Four audit, but that the process was taking time given the company’s size.

The GENIUS Act, signed into law by President Donald Trump last summer, requires all foreign stablecoin issuers—theoretically including Tether, which is based in El Salvador—to undergo rigorous audits of its stablecoin reserves. Ardoino said last year he intends for USDT to comply with the law. A Big Four audit would go a long way to achieving that goal. Last fall, Tether launched an American offshoot with its own, U.S.-specific stablecoin, USAT. The token launched in January, and currently boasts a far smaller market capitalization than Tether’s flagship token: just $27 million, compared to USDT’s $184 billion. USAT’s far smaller reserves were successfully audited by Deloitte a month later.