UK Stablecoin Regulation Framework Takes Shape: What Retail Arbitrage Means for Payments

The Bank of England has unveiled a comprehensive regulatory framework for sterling-denominated stablecoins, sparking intense debate within the financial industry. The consultation, launched in late 2025, addresses how systemic stablecoins should be regulated when widely adopted for payment purposes. The UK’s central bank believes that stablecoins could enable faster, cheaper, and more efficient payments if embraced extensively across the country. Under the Financial Services and Markets Act 2023, the BoE’s mandate expanded to include digital settlement assets, making stablecoins a regulatory priority—particularly as concerns mount over retail arbitrage opportunities that could destabilize the market.

Reserve Requirements and the Retail Arbitrage Challenge

The BoE’s framework proposes specific reserve requirements designed to balance liquidity and efficiency. Systemic stablecoin issuers would be required to maintain up to 60% of assets in short-term UK government debt and at least 40% as unpaid central bank deposits. The central bank argues this 60-40 split preserves liquidity while allowing modest returns for issuers. However, UK policymakers rejected proposals for higher allocations to government debt, citing concerns that insufficient cash reserves could prevent quick redemption demands—a critical vulnerability if retail investors engage in arbitrage strategies.

The 40% non-interest-bearing deposit requirement serves two purposes: it provides instant liquidity during market shocks and reflects stress-scenario withdrawal calculations. Yet the Institute of International Finance questioned whether this approach remains competitive with other regimes, particularly Europe’s MiCA framework. The industry group highlighted a key worry: restrictive reserve rules could create arbitrage opportunities between UK-regulated stablecoins and less-regulated alternatives elsewhere, encouraging regulatory arbitrage rather than stability.

Joint Regulation Model and Industry Concerns

Systemic stablecoins used for retail or corporate payments will fall under joint supervision by the Bank of England and the Financial Conduct Authority, following HM Treasury’s identification of systemically important services. Non-systemic tokens primarily used for crypto trading face FCA-only oversight. Issuers designated as systemic come under Banking Act authorities, granting regulators power to request information, establish rules, and enforce compliance.

The IIF and other industry participants raised several concerns about competitiveness and feasibility. They questioned whether restrictions on permissionless blockchains could be effectively enforced and called for clearer definitions of terms like “digital settlement” and “qualifying stablecoin.” The industry advocacy group recommended that the BoE permit alternative remunerated assets—such as commercial bank deposits or special-purpose money market funds—rather than mandating unpaid central bank reserves. This suggestion aims to level the playing field between bank-affiliated and non-bank issuers globally, preventing the very arbitrage dynamics that could fragment the market.

UK Parliament Steps Up Scrutiny

Beyond the BoE’s consultation, the UK Parliament is intensifying its focus on the stablecoin sector. The House of Lords Financial Services Regulation Committee launched a formal inquiry in February 2026, seeking submissions on stablecoin growth and proposed regulations. The committee specifically asked for evidence on opportunities and threats to the UK economy, market development forecasts, and existing regulatory barriers. With a submission deadline of March 11, 2026, the committee aims to gather comprehensive stakeholder input before finalizing its recommendations.

Lord Forsyth of Drumlean, Chair of the Committee, welcomed submissions from anyone with expertise or interest in the area, signaling Parliament’s commitment to balancing innovation with financial stability. This dual-track regulatory approach—combining BoE policy development with parliamentary scrutiny—reflects the UK’s determination to establish a clear, credible framework that addresses both retail investor protection and the prevention of arbitrage between different regulatory jurisdictions.

The outcome will significantly shape how stablecoins are deployed for everyday retail payments in the UK, while also influencing whether the country becomes a global leader in digital asset regulation or cedes ground to more permissive jurisdictions abroad.