Stablecoin Regulation in June 2026: The U.S. GENIUS Act Countdown and the Bank of England's Pivot

Regulators on both sides of the Atlantic are reshaping how stablecoins are issued, backed, and used. In the United States, the GENIUS Act implementation is entering its final sprint with a hard July 18, 2026 deadline, while the Bank of England has just released a significantly softened final policy. Here is what is happening and what it means for the stablecoin market, which now exceeds $320 billion.

The U.S. GENIUS Act: A Race Against the Clock

The Guiding and Establishing National Innovation for U.S. Stablecoins (GENIUS) Act was signed into law on July 18, 2025 . It is the first federal law to create a comprehensive regulatory framework for payment stablecoins in the United States . The law mandates that six federal agencies — the Office of the Comptroller of the Currency (OCC), the Federal Deposit Insurance Corporation (FDIC), the Federal Reserve Board, the National Credit Union Administration (NCUA), the Financial Crimes Enforcement Network (FinCEN), and the Office of Foreign Assets Control (OFAC) — publish final implementing regulations by July 18, 2026 .

As of late June 2026 — with only weeks remaining — none of the required final rules have been issued. Only Notices of Proposed Rulemaking (NPRMs) are on the table, creating an extraordinarily tight window for agencies to reconcile and finalize six separate proposed frameworks .

When Does the Law Take Effect?

The GENIUS Act becomes effective on the earlier of either 18 months after its enactment (January 18, 2027) or 120 days after the primary federal payment stablecoin regulators issue final regulations . If final rules are published in late July or shortly thereafter, the law could become effective in late 2026 .

Key Statutory Classifications

Under the GENIUS Act:

• Permitted Payment Stablecoins are classified as neither securities nor commodities under federal law .
• Issuers are prohibited from paying yield on payment stablecoins .
• Issuers must maintain one-to-one reserve backing with high-quality liquid assets .
• Issuers with less than $10 billion in outstanding stablecoins may opt for state-level regulation rather than federal registration, provided the state's regulatory framework meets statutory standards .

The Fed's Proposed Customer Identification Rule

On June 18, 2026, the Federal Reserve Board, together with FinCEN, the OCC, the FDIC, and the NCUA, jointly proposed a rule requiring Permitted Payment Stablecoin Issuers (PPSIs) to maintain an effective customer identification program (CIP) . This is a major step in implementing the GENIUS Act.

The proposal mandates the collection of a customer's name, date of birth (or date of formation for an entity), physical address, and an identification number before an account can be opened . Records must be retained for five years after the account is closed, consistent with standard BSA recordkeeping requirements . A 60-day public comment period is now open . The rule applies when a customer interacts directly with the issuer, such as when minting or redeeming tokens, but does not directly cover secondary market trades on exchanges .

This rule is designed to bring stablecoin issuers under the same anti-money laundering (AML) and Know Your Customer (KYC) discipline that applies to traditional banks and credit unions .

United Kingdom: Bank of England's Revised Framework

On June 22, 2026, the Bank of England (BoE) published its final policy statement and draft rules for systemic sterling stablecoins, marking a significant shift from its earlier proposals .

Individual Holding Caps Scrapped

The BoE abandoned previously proposed limits of approximately £20,000 for individuals and £10 million for businesses . Instead, it imposed a provisional £40 billion (~$52.8 billion) total issuance cap per systemic stablecoin, to be reviewed periodically . The BoE described this as a "temporary issuance guardrail" .

Backing Assets Relaxed

The maximum share of backing assets that can be held in interest-bearing short-term UK government debt was raised from 60% to 70% . The remaining portion must be held in non-interest-bearing central bank deposits to ensure liquidity for redemptions .

Timeline

The draft code of conduct is open for consultation until September 2026. The BoE expects to publish final rules by the end of 2026, with potential stablecoin launches possible in 2027 .

Market Context: A $320 Billion Milestone

The global stablecoin market has continued to expand rapidly. The total market capitalization reached a record ~$320–$323 billion by the end of May 2026, up from roughly $205 billion at the start of 2025 — a more than 50% increase in about sixteen months . According to DeFiLlama data from May 26, 2026, the total was $321.6 billion, representing roughly 12% growth year-to-date .

Tether (USDT) remains the dominant player, holding approximately 58% of the market with a market cap of roughly $185–$186 billion . Circle's USDC is the second largest .

This regulatory activity from both the U.S. and the UK is occurring against a backdrop of a maturing and rapidly growing stablecoin ecosystem, which is increasingly viewed as a critical layer for settlement, payments, and institutional crypto adoption.