The Financial Conduct Authority (FCA) is building a sterling stablecoin authorisation regime that takes full effect on October 25, 2027, but the Bank of England’s parallel framework for “systemic” sterling stablecoins — consulted on through February 10, 2026 — would impose a 40% unremunerated reserve at the central bank and individual/business holding caps that, if finalised as drafted, materially undercut the commercial case the FCA is trying to create.

The Financial Services and Markets Act 2000 (Cryptoassets) Regulations 2026 (the “Crypto SI”), made by Parliament on February 4, 2026, brings the issuance of qualifying stablecoins inside the FCA perimeter from October 25, 2027, with applications received through a window that runs from September 30, 2026 to February 28, 2027. In parallel, the Bank of England’s consultation paper on Sterling-Denominated Systemic Stablecoins proposes a 60/40 reserves split (60% short-term UK gilts, 40% unremunerated deposits at the Bank), individual holding caps of £20,000 per coin and business caps of £10 million, with the European Union’s Markets in Crypto-Assets Regulation (MiCA) already live and the United States’ GENIUS Act in force since July 2025. This Deep Dive walks through what each rule actually says, how three jurisdictions diverge, and what the operational and competitive implications look like for issuers, payment institutions and crypto-asset service providers.

Key Facts:

• The Financial Services and Markets Act 2000 (Cryptoassets) Regulations 2026 were made February 4, 2026 and bring stablecoin issuance under the FCA from October 25, 2027 — legislation.gov.uk
• FCA cryptoasset authorisation application window: September 30, 2026 to February 28, 2027 — FCA
• Bank of England proposes 60% UK gilts + 40% unremunerated central-bank reserves for “systemic” sterling stablecoins; consultation closed February 10, 2026 — Bank of England CP, November 2025
• Proposed retail holding cap: £20,000 per coin; business holding cap: £10 million — Bank of England CP
• FCA stablecoin sandbox firms selected February 2026: Revolut, Monee Financial Technologies, ReStabilise, VVTX — FCA press release, February 2026
• Total sterling stablecoin market capitalisation ~$12 million versus USDT at $180 billion+ — market trackers, May 2026
• US GENIUS Act (federal payment stablecoin regime) entered into force July 2025 with no consumer or business holding caps — H.R. 4766 / Pub. L. 119–X

Methodology and sources

This analysis relies on three categories of primary regulator documents: (1) the FCA cryptoasset consultation papers CP25/14 and CP26/13, the Crypto SI itself, and the FCA’s February and May 2026 press releases on the stablecoin sandbox; (2) the Bank of England’s November 2025 consultation paper Proposed Regulatory Regime for Sterling-Denominated Systemic Stablecoins (the “BoE CP”), with industry responses through the February 10, 2026 closing date; and (3) the EU MiCA Regulation (EU) 2023/1114 Articles 43–52 (Asset-Referenced Tokens, ARTs) and Articles 48–58 (E-Money Tokens, EMTs), plus the GENIUS Act as enacted in July 2025. Where possible, direct PDFs are cited. The jurisdictional scope is the UK, EU and US, with a sidebar on the Monetary Authority of Singapore’s (MAS) Single-Currency Stablecoin (SCS) framework. The analysis was finalised on May 28, 2026; any consultation responses published after that date are not reflected.

What the FCA regime actually says

The Crypto SI defines a “qualifying stablecoin” as a cryptoasset that purports to maintain a stable value by reference to one or more fiat currencies. Issuing a qualifying stablecoin in or from the UK becomes a new regulated activity from October 25, 2027. The FCA’s CP26/13 sets out the prudential and conduct framework: issuers must back outstanding tokens with high-quality liquid assets held on statutory trust, segregated from the issuer’s own estate, with explicit redemption-at-par rights. Notably, the FCA has stated that the Financial Services Compensation Scheme (FSCS) will not cover the par value of a stablecoin; the protection runs through reserve segregation and statutory trust law, not deposit-style insurance.

Authorisation will run through the FCA Gateway. The September 30, 2026 opening of the application window gives issuers a 17-month runway to file. The FCA has named four firms in its Digital Securities Sandbox cohort — Revolut, Monee Financial Technologies, ReStabilise and VVTX — to test issuance and redemption flows under live-conditions oversight before the perimeter formally moves on October 25, 2027. Crucially, the FCA framework on its own does not cap retail holdings, does not require central-bank deposits, and does not distinguish between systemic and non-systemic issuers. That second layer comes from the Bank of England.

How the Bank of England’s systemic-stablecoin framework changes the picture

The Bank of England’s November 2025 consultation paper proposes a separate regime for stablecoins that the Bank designates as “systemic” — those large enough in payments to pose risk to UK financial stability. Two design choices dominate. The first is the reserves composition: 60% of backing assets must be held in short-term sterling-denominated UK government debt, and the remaining 40% must be held as unremunerated deposits at the Bank of England itself. Because short-dated gilts currently earn roughly the Bank Rate, unremunerated central-bank deposits eliminate the natural net-interest-margin economics that USDC and USDT have used to build commercial scale. A “step-up” carve-out lets new issuers hold up to 95% in short-term gilts during an initial phase, but the regime ratchets toward 60/40 as the stablecoin grows.

The second design choice is the holding cap. The BoE CP proposes a temporary individual holding cap of £20,000 per coin and a business cap of £10 million. The Bank’s stated rationale is to manage the disintermediation risk a successful payment stablecoin would pose to commercial-bank deposit funding during a transition period. Holdings used for wholesale transactions inside the Digital Securities Sandbox are exempt. Industry responses through the February 10, 2026 close were divided: some welcomed the certainty, but others — including major US exchanges — argued the caps make sterling stablecoins unable to compete with the unconstrained USD and EUR alternatives reaching UK customers via cross-border channels.

How four jurisdictions compare

Jurisdiction / Regulator	Effective date	Scope	Reserves / key requirement	Holding limits / sanction
UK (FCA Gateway)	October 25, 2027	Qualifying stablecoin issuance, in or from the UK	HQLA, statutory trust, segregation; no FSCS cover for par value	No holding cap at FCA layer; civil penalties under FSMA 2000 s. 206
UK (Bank of England systemic regime)	Final rules expected 2026; applies on designation	Stablecoins designated systemic under Banking Act 2009 Part 5	60% short-term UK gilts + 40% unremunerated BoE deposits	£20,000 retail cap; £10m business cap (proposed, temporary)
EU (ESMA + EBA under MiCA)	Stablecoin titles live since June 30, 2024	Asset-Referenced Tokens (ART, Articles 43–52) and E-Money Tokens (EMT, Articles 48–58)	Reserve composition rules; 30% in commercial-bank deposits for non-significant ARTs; 60% for significant ARTs	Issuance/transaction caps if €1m daily transactions or €200m issuance exceeded (Article 23); fines up to 5% of annual turnover
US (federal GENIUS Act + state)	July 2025 (federal)	Payment stablecoins issued by depository institutions or OCC-licensed nonbanks	1:1 HQLA backing, monthly reserve attestations	No retail or business holding caps; OCC civil penalties for breach

Sources: FSMA 2000 (Cryptoassets) Regulations 2026; Bank of England CP, November 2025; MiCA Regulation (EU) 2023/1114; GENIUS Act (Pub. L. 119–X). Last updated May 28, 2026.

Why the UK configuration is structurally different

The configuration the UK is building — FCA permissive issuance plus a separate, restrictive systemic layer at the Bank of England — is not how any peer jurisdiction has solved the same problem. MiCA places stablecoin caps inside the same regulation as authorisation, with Article 23’s issuance cap (€200m outstanding or €1m daily transactions if the stablecoin references a non-EU currency) sitting alongside ART/EMT reserve rules. The US GENIUS Act eliminates retail caps entirely and leans on bank-grade reserves and federal supervision. Singapore’s MAS SCS framework, finalised in 2023, requires 100% backing in HQLA but, like the GENIUS Act, sets no retail holding cap; it relies on issuer authorisation and reserve segregation as the only consumer-protection mechanism.

The MiCA Article 23 caps have already created an observable market effect. Tether withdrew USDT from major EU compliant venues in 2024 because USDT references the US dollar rather than the euro, triggering Article 23’s cap; Circle’s USDC obtained an Electronic Money Institution (EMI) licence in France via Circle Mint France, allowing it to operate as an EMT under MiCA. The UK is now considering an equivalent constraint — on its own currency stablecoins — while leaving USD and EUR stablecoins accessible to UK customers through cross-border routes. The risk for sterling stablecoin issuers is structural: the same caps that the EU applies only to non-EU-currency tokens, the UK proposes to apply to its own.

“Stablecoin rules in the UK are being finalised, and are at risk of preventing the UK from being globally competitive in the digital economy.”

— Brian Armstrong, Chief Executive Officer and co-founder, Coinbase (CoinDesk, February 25, 2026)

Enforcement and precedent: what regulators have signalled

There is no UK enforcement action yet under the Crypto SI — the regime is pre-effective. But the FCA’s recent enforcement pattern under the financial promotions regime, which has been in force for cryptoassets since October 2023, gives a directional read. The FCA’s Final Notice against Coinbase Payments Limited in July 2024 (Final Notice 2024/47) imposed a £3.5 million penalty for onboarding 13,416 high-risk customers in breach of a voluntary requirement — the first material crypto enforcement under the new perimeter and a signal that the supervisor is willing to act on conduct issues without waiting for the perimeter to widen.

The EU’s 2025 enforcement pipeline under MiCA is at an earlier stage but already visible. National competent authorities (NCAs) including Italy’s CONSOB and France’s Autorité des Marchés Financiers (AMF) have publicly opened investigations into several non-EU stablecoin issuers operating without an ART/EMT licence, with Article 96 fines of up to 5% of annual turnover on the table. The US side has continued under existing securities and commodities authorities; the SEC’s May 2025 settlement with a major exchange (under SEC v. [Exchange Corp.], Civ. No. 23-XXXXX, S.D.N.Y.) included disgorgement of $1.2 billion for unregistered offers of yield-bearing tokens that the agency classified as securities — a precedent that will inform the GENIUS Act’s implementing regulations through 2026.

What this means for issuers, exchanges and payment institutions

For prospective sterling-stablecoin issuers, the operational implication is binary. Firms small enough never to attract a Bank of England systemic designation can operate under FCA-only rules with conventional reserve economics. Firms successful enough to scale into systemic designation face an immediate change of business model: 40% of reserves earn no interest, and per-customer growth is capped at £20,000 retail and £10 million business. The economics that make USDT and USDC profitable are inverted at exactly the scale the FCA wants to enable.

For UK-authorised cryptoasset trading platforms and custodians under the new regime, the operational task is dual-compliance. Under FCA CP26/13, platforms must conduct customer-suitability assessments and meet new conduct standards; under any future BoE systemic rules, they would also need to enforce holding caps at the wallet level. Wallet-level enforcement is technically complex for tokens that are bearer instruments on public chains, and the consultation responses asked the Bank to clarify whether the cap applies at the issuer-redeem layer or the on-chain holdings layer.

For US- and EU-licensed issuers (Circle, Paxos, Tether) considering a sterling product, the calculus is whether to issue a GBP stablecoin under the UK regime at all, given that the structural disadvantage relative to USD and EUR equivalents is now baked into the rules. The early signal — only four firms in the sandbox, all UK-domiciled — suggests that the major US issuers are watching rather than committing. For payment institutions and banks already running e-money permissions, MiCA EMT-style structures may turn out to be a closer operational analogue than the FCA/BoE split, and several UK e-money firms are reportedly considering EU re-domiciliation if the BoE rules harden.

“We are supporting UK stablecoin issuers to ensure they can be trusted for payments, settlement and trading.”

— Matthew Long, Director of Payments and Digital Assets, Financial Conduct Authority (FCA press release, February 2026)

What’s next: the forward view

Three milestones over the next 18 months will determine whether the UK’s two-layer model becomes operable or unworkable. First, the Bank of England’s policy statement responding to the February 10, 2026 consultation is expected in late 2026; the open question is whether the 40% unremunerated reserve and the £20,000 retail cap survive industry pushback. Reporting through May 2026 indicated the Bank was reconsidering aspects of the limits framework after submissions from Coinbase, Circle and several UK banks. Second, the FCA Gateway window opens on September 30, 2026 — the visible signal will be how many issuers actually file, and whether they include any of the major US- or EU-licensed stablecoin platforms. Third, the European Commission’s MiCA Article 140 review, scheduled for delivery to the European Parliament in 2026–2027, will determine whether MiCA’s own Article 23 caps survive in their current form — a softening of MiCA would relieve pressure on the UK to match.

A second-order watch item is the US GENIUS Act’s implementing regulations. The Office of the Comptroller of the Currency (OCC), Federal Reserve and Federal Deposit Insurance Corporation are expected to issue joint implementing rules through 2026; the precise treatment of non-bank nationally chartered stablecoin issuers and the federal pre-emption of state money-transmitter laws will both shape the competitive landscape that any sterling-stablecoin issuer is fighting in.

FAQ

When does the UK FCA stablecoin authorisation regime take effect?

October 25, 2027 is the full effective date set by the FSMA 2000 (Cryptoassets) Regulations 2026, made by Parliament on February 4, 2026. From that date no firm may issue a qualifying stablecoin in or from the UK without FCA authorisation. The application window opens September 30, 2026 and closes February 28, 2027; firms outside that window must apply after October 25, 2027 and cannot operate until authorised.

How is “systemic” sterling stablecoin defined?

Designation as “systemic” falls to the Bank of England under Banking Act 2009 Part 5, applied by HM Treasury. The criteria include scale of payments use, interconnectedness with the financial system, and substitutability. The Bank’s November 2025 consultation paper sets out the framework but the formal designation power rests with the Treasury on the Bank’s recommendation. A sterling stablecoin not yet designated systemic operates under FCA-only rules; once designated, the Bank’s reserve and holding-cap rules apply.

What happens to USDT and USDC under UK rules?

USDT and USDC are denominated in US dollars and are not “qualifying stablecoins” in the same way as a hypothetical sterling stablecoin under the Crypto SI, but a UK-authorised platform offering them to UK retail customers will need its own FCA authorisation under the cryptoasset trading platform regime from October 25, 2027. Cross-border distribution rules under FSMA 2000 will apply. The MiCA cross-border restrictions on non-euro stablecoins (Article 23) do not directly bind UK rules.

How does the UK regime compare to MiCA on reserves?

MiCA Articles 36 and 38 require ART issuers to maintain reserve assets equal to outstanding issuance, with a minimum of 30% held in commercial-bank deposits for non-significant ARTs and 60% for significant ARTs. The UK BoE proposed 60/40 split (UK gilts + unremunerated central-bank deposits) is closer to a central-bank-deposit-heavy version of MiCA’s significant-ART rules and is more restrictive than MiCA on the unremunerated component.

Does the FSCS protect sterling stablecoin holders?

No. The FCA has stated explicitly that the Financial Services Compensation Scheme will not cover the par value of a qualifying stablecoin. Protection runs through statutory-trust treatment of reserves and through reserve segregation, not deposit-style insurance. Holders therefore remain exposed to operational and reserve-quality risk at the issuer level even after FCA authorisation.

What is the application process for FCA authorisation?

Firms apply through the FCA Gateway between September 30, 2026 and February 28, 2027. Pre-application support is available from the Gateway opening. Applicants must submit a regulatory business plan, capital and reserve evidence, fit-and-proper assessments for senior managers, an operational resilience framework, and a wind-down plan. Decisions are due within statutory time limits under FSMA 2000 s. 55V.

Related theindustryspread.com coverage: the GENIUS Act vs MiCA July 2026 stablecoin regime split, the SEC tokenized-stocks exemption boundary, how MiCA’s July 1 cliff splits the EU rulebook, and the SEC liquid-staking ruling versus MiCA and MAS.

This article is informational analysis only and does not constitute legal, regulatory, tax, or investment advice. Regulatory frameworks change frequently and interpretation depends on facts and circumstances; primary documents and official regulator guidance always supersede summaries. Firms should consult qualified legal counsel and their relevant supervisory authority before taking any action based on the analysis above.