The UK Financial Conduct Authority published its final policy statements on June 30, 2026, laying out a comprehensive regulatory framework for cryptoasset activities. The headline move: slashing the required capital buffer for stablecoin issuers from the originally proposed 2% to just 1% of total stablecoins in circulation.

The revised requirement, known as the K-SII factor, sits at the core of a new Cryptoasset sourcebook called CRYPTOPRU, which covers everything from asset backing and redemption rules to public disclosures and market integrity standards.

What the new rules actually look like

The reduction from 2% to 1% means a stablecoin issuer with $1B in circulation needs to hold $10M in reserve capital instead of $20M.

The FCA also established a permanent minimum capital floor of £350K for stablecoin issuers.

Authorization for firms wanting to issue qualifying stablecoins kicks off on September 30, 2026, with broader implementation rolling out gradually through 2027.

Systemic stablecoin issuers, meaning those large enough to pose risks to financial stability, will face joint supervision from both the FCA and the Bank of England.

The UK vs. EU regulatory chess match

The EU’s Markets in Crypto-Assets Regulation, better known as MiCA, has been live since mid-2024, giving Brussels a head start in establishing clear rules for crypto firms operating in Europe. By cutting the stablecoin capital buffer in half during the consultation process, the FCA is positioning the UK as more competitive on capital requirements.

The framework specifically targets fiat-backed stablecoins, with references to tokens like tGBP appearing in the documentation.

What this means for investors

The joint FCA-Bank of England supervision model for systemic issuers adds a layer of institutional credibility that could matter for traditional finance players considering stablecoin integration.

The phased rollout through 2027 means the practical impact of these rules won’t be fully visible for at least another year. Firms need to apply for authorization, build compliance systems, and actually launch products before investors see any tangible benefits.

The £350K minimum capital requirement is modest by traditional finance standards, but the broader CRYPTOPRU framework includes disclosure, backing, and redemption obligations that carry their own compliance costs. For well-capitalized firms already navigating MiCA in the EU, adding a UK authorization could be straightforward.