Bridging the Atlantic: How the UK and US are Shaping the Future of Stablecoins

Bridging the Atlantic: How the UK and US are Shaping the Future of Stablecoins
2025 - affectionately known to us Owls as the Year of the Stablecoin - has certainly lived up to expectations in the policy stakes.
In the US, President Trump signed the long awaited the Guiding and Establishing National Innovation for U.S. Stablecoins (GENIUS) Act into law on July 18, establishing the first federal framework for so-called “payment stablecoins” (seemingly just about any stablecoin). At the same time, the FCA has recently closed its consultation on a regulatory framework for stablecoins in the UK.
With these two major jurisdictions finalizing their regulatory frameworks for fiat-backed stablecoins, understanding the differences between their approaches provides insights not just for issuers, but for global market design and those thinking broadly about the potential impacts of a world full of stablecoins in multiple currencies. We briefly compare and contrast key aspects of the two regimes, and suggest what this means in practice.
Scene Setting
Both regimes would regulate the issuance of stablecoins and the issuers and intermediaries who support them. They start with similar definitions of stablecoins: essentially those fiat-denominated stablecoins that can be used in payments. Stablecoins linked to other assets are left to other regulation. We Owls have explained how regulation of these other assets might work, including to the SEC Crypto Task Force and in response to an FCA consultation.
One key element mandated by the GENIUS Act and the FCA’s consultation is the requirement that issuers maintain 1:1 backing of their stablecoins with high-quality, liquid reserve assets (essentially cash and cash equivalents). Both approaches also set enforceable standards for who may issue a stablecoin, redemption rights, disclosures, and custody of the backing assets. Let’s dig a bit into the details, comparing and contrasting the two approaches.
Keeping It In Reserve
In the US, an issuer’s stablecoins must be backed up one-to-one by eligible instruments, such as:
US currency, demand deposits or deposits held at Federal Reserve Banks;
Treasury bills or bonds with a maturity of 93 days or less;
Funding secured through a repurchase agreement backed by T-bills and cleared at a registered Central Clearing Agency (CCA);
Securities issued by a registered investment company or other money market fund;
Any similarly liquid federal government-issued assets approved by the issuer’s regulators; and
Tokenized versions of eligible instruments that comply with applicable laws.
In the UK, an issuer will only be able to hold “core backing assets” for the one-to-one backing, comprised of:
short term deposits, short-term government debt instruments;
longer term government debt instruments that mature in over one year;
units in a Public Debt CNAV Money Market Fund (PDCNAV MMF); and
assets, rights or money held as a counterparty to a repurchase agreements or a reverse repurchase agreements.
Both jurisdictions require that the reserves be segregated and not commingled with the issuer’s operational funds.
Verdict: aligned.
A Shot At Redemption
In the US, customers must have a clear, enforceable right to redeem stablecoins for the reference currency (e.g., U.S. dollars) on demand. The GENIUS Act requires issuers to publish a redemption policy that promises “timely redemption” of stablecoins for fiat, with any fees disclosed in plain language and capped (fees can only be changed with seven days’ notice). Regulators are expected to formalize operational expectations in the required implementing rulemakings.
In the UK, the FCA has proposed that any stablecoin holder can redeem directly with the issuer in one business day. It proposes requiring that any fees charged for redemption be commensurate with the operational costs incurred for executing redemption. In all cases fees must not exceed the value of the stablecoins being redeemed, or pass on costs and losses arising from the sale of assets in the backing asset pool.
Verdict: to be determined. The FCA’s T+1 proposal is stringent, and more so than other regimes, such as the Markets in Crypto Assets regulation in the EU. Permitting a more flexible redemption timeline could give the US a competitive edge, although the consumer aspect may also be important.
What’s The Issue(ance)
The GENIUS Act’s general rule is that only U.S.-regulated issuers can directly issue stablecoins to U.S. users, but it creates a possible exception for foreign issuers that meet strict criteria and obtain a form of U.S. approval.
Foreign issuers may issue stablecoins in the U.S., and digital asset service providers may offer or sell such issuer’s payment stablecoin, if the foreign issuer:
Is subject to regulation and supervision by a foreign regulator that the U.S. Treasury determines is “comparable” to the regulatory and supervisory regime under GENIUS, a determination which Treasury has 210 days to make;
Is registered with the OCC;
Holds reserves in a U.S. financial institution sufficient to meet liquidity demands of U.S. customers; and
The foreign jurisdiction in which the issuer is based is not subject to comprehensive economic sanctions.
In the UK, anyone wishing to issue a qualifying stablecoin must be authorised and regulated by the FCA. However, issuers based overseas, even if they are issuing a GBP stablecoin and/or issuing to UK customers, do not require FCA authorisation, unless they are also conducting another UK-regulated activity. While this allows for a theoretical route for UK customers to access unregulated overseas stablecoins, in practice most UK customers will be relying on intermediaries like a trading platform, which would be in scope of local UK regulation.
Verdict: not aligned. The UK may have a competitive advantage by allowing foreign issuers more flexibility.
No Interest In That
Both the GENIUS Act and the UK FCA do not allow stablecoin issuers to pay their holders any form of interest or yield (whether in the form of cash, tokens or other consideration) if it is solely related to holding, retention or use of the coins. Both are silent on other types of programs such as rebates to intermediaries that might be passed on to consumers. In both instances, it seems that the boundary between prohibited yield and permissible rewards tied to other activity may be subject to future rulemaking and regulatory interpretation.
Verdict: aligned
What About Implementation?
The GENIUS Act becomes effective on the earlier of 18 months after enactment - that is, January 18, 2027, or 120 days after the primary federal payment stablecoin regulators (e.g. Federal Reserve, OCC, FDIC, SEC/CFTC) issue final implementing regulations.
Additionally, within 1 year of enactment (i.e. by July 18, 2026), Primary Federal payment stablecoin regulators, The Secretary of the Treasury, and each state payment stablecoin regulator must issue proposed and final rules via notice-and-comment.
Three years after enactment (by July 18, 2028) it becomes unlawful for any digital-asset service provider (e.g., exchanges, custodial wallets) to offer or sell payment stablecoins in the US unless those stablecoins are issued by a permitted payment stablecoin issuer under the Act.
So what does that actually mean for firms?
Market participants have roughly 12 months (until mid‑2026) to prepare for proposed regulatory standards.
Full compliance requirements kick in by early 2027, unless regulators finalize rules sooner.
Digital-asset platforms must ensure that all payment stablecoins offered in the U.S. are issued by authorized entities by mid‑2028. Up until then, platforms may continue to offer and sell stablecoins that have not been issued by permitted stablecoin issuers.
In the UK, assuming the FCA sticks to its 2024 Roadmap, firms can expect final rules published in the first half of 2026, with the regime switching on, at the earliest, late 2026. However, there is likely to be a phased implementation period, with firms who have an existing MLR registration or an existing FSMA authorization treated differently to firms seeking FCA authorization for the first time.
If the UK is nimble and decisive, it could match the US’s timeline of full compliance by early 2027. However, given the level of commitment and pace of legislation as demonstrated by GENIUS, it seems inevitable that the UK is going to land its regime after the US.
The View From The Nest
While both jurisdictions are moving swiftly to bring stablecoin activity within the regulatory perimeter, their paths diverge in meaningful ways. The UK’s rules reflect a strong focus on financial services oversight and bank-level safeguards, while the US approach is more explicitly centered on payment system stability and state–federal alignment around issuer regulation. Whether this divergence ultimately fosters jurisdictional competition, interoperability or friction will depend on how these rules are implemented - and how responsive they remain to a market still evolving at speed.
We intend to host some local invite-only events in various locations around the world in the coming months to learn more about how the experts are thinking about stablecoins and their impacts on payments, banking and the overall digital economy. We will share the key themes from each event with everyone.