Core Operational Requirements
Published 6/29/2026, 6:44:57 AM
The Bank of England (BoE) finalized its regulatory framework for sterling-denominated systemic stablecoins in June 2026, introducing a 70/30 backing asset rule. This policy mandates that systemic issuers hold 30% of their reserves in unremunerated (zero-interest) central bank deposits and the remaining 70% in short-term UK gilts [Source: https://www.bankofengland.co.uk/paper/2026/ps/sterling-denominated-systemic-stablecoin]. This rule fundamentally shifts stablecoin operations from high-yield reserve management to a liquidity-first model, effectively imposing a "stability tax" on UK-based issuers.
Core Operational Requirements
The 30% reserve rule is part of a broader structural overhaul designed to eliminate commercial bank contagion risk and ensure immediate liquidity.
| Operational Area | Requirement | Impact on Issuers |
|---|---|---|
| Reserve Composition | 30% BoE Deposits / 70% Short-term Gilts | Issuers lose interest income on 30% of their float; 100% yield-bearing portfolios are prohibited [Source: https://www.bankofengland.co.uk/paper/2026/ps/sterling-denominated-systemic-stablecoin]. |
| Redemption Rights | 24-hour par redemption | Issuers must provide redemption at face value within 24 hours; suspension of redemptions is prohibited even during market stress [Source: https://www.bankofengland.co.uk/paper/2026/ps/sterling-denominated-systemic-stablecoin]. |
| Issuance Limits | £40 billion aggregate cap | Replaces previous £20k individual wallet limits with a systemic cap to manage growth risks [Source: https://www.bankofengland.co.uk/paper/2026/ps/sterling-denominated-systemic-stablecoin]. |
| Asset Safeguarding | Dual Statutory Trusts | Reserves must be held in UK-based statutory trusts specifically for "Financial Risk" and "Insolvency" [Source: https://www.bankofengland.co.uk/paper/2026/ps/sterling-denominated-systemic-stablecoin]. |
Strategic Reshaping of Operations
1. Revenue Compression and Margin Squeeze By mandating that 30% of reserves earn zero return, the BoE has made the UK a more expensive jurisdiction compared to the US or the EU (under MiCA), where issuers can typically earn yield on a larger portion of their reserves. This forces issuers to pivot their business models away from interest-margin reliance toward transaction fees and ancillary services [Source: https://www.bankofengland.co.uk/paper/2026/ps/sterling-denominated-systemic-stablecoin].
2. Elimination of Commercial Bank Risk The rule explicitly prohibits holding backing assets in commercial bank deposits. This is a direct response to the 2023 Silicon Valley Bank collapse, intended to prevent stablecoins from being affected by traditional banking crises. Consequently, issuers must now manage complex gilt portfolios and maintain direct central bank accounts rather than relying on commercial banking partners [Source: https://www.bankofengland.co.uk/paper/2026/ps/sterling-denominated-systemic-stablecoin].
3. Access to Central Bank Liquidity To prevent "fire-sales" of the 70% gilt portion during a mass redemption event, the BoE has introduced a Central Bank Liquidity Facility. This allows solvent systemic issuers to pledge their gilts for emergency sterling liquidity, providing a safety net that is not available to non-systemic (FCA-regulated) stablecoins [Source: https://www.bankofengland.co.uk/paper/2026/ps/sterling-denominated-systemic-stablecoin].
4. Operational Onshoring The framework requires any issuer designated as "systemic" to establish a UK subsidiary. This means global entities like Circle or Tether would need to onshore their UK operations and hold all backing assets within the UK to comply with the 70/30 mandate [Source: https://www.bankofengland.co.uk/paper/2026/ps/sterling-denominated-systemic-stablecoin].
Implementation Timeline
- June 2026: Final Policy Statement published.
- End of 2026: Expected release of the Final Code of Practice.
- 2027: The full regulatory regime becomes operational for systemic issuers.
While the rule ensures high levels of liquidity, it remains unconfirmed whether the increased compliance costs will definitively drive smaller issuers out of the market or if the £40 billion cap will be adjusted as the market matures. Currently, the rule prioritizes financial stability over the competitive yield-generation seen in other jurisdictions.