Headline: UK’s FCA draws a hard line at 24 hours — new crypto perimeter could snare unexpected players
The U.K. financial watchdog has published fresh guidance that could quietly widen the regulatory definition of custody — and catch some crypto firms off guard.
In its new Cryptoasset Perimeter Guidance, the Financial Conduct Authority (FCA) sets a bright-line test: any firm that holds client crypto assets for longer than 24 hours during trade settlement is likely to be treated as a regulated custodian. That classification carries a major compliance burden — firms would need a full safeguarding licence rather than relying on lighter-touch arrangements.
Why the 24-hour rule matters
- The one-day threshold turns what many platforms and apps consider routine settlement timing into a potential gateway to full custody regulation. Firms that don’t think of themselves as custodians could suddenly fall under the FCA’s safeguarding requirements simply because assets sit on their systems for more than a day.
- The consequence: increased capital, governance and consumer-protection obligations, plus ongoing FCA supervision.
Tech providers and validators: the “added value” trap
The guidance also warns validators, node operators and other infrastructure providers that their “pure tech” exemption will evaporate if they add user-facing features or services that go beyond raw infrastructure. Examples the FCA calls out include user dashboards, yield-generating mechanics, or reward-compounding tools. Once such “added value” is offered, these providers will likely need full approval to arrange staking and other services.
Shadow custody clarified
For the first time the FCA tackles “shadow custody.” It makes clear that a crypto service provider is a custodian if it can — even theoretically — override a client’s authority over assets. Promises that the provider will not exercise that power won’t remove the custody label. The guidance stresses that the presence of smart contracts, public blockchains or decentralisation alone does not exempt a service from regulation.
Stablecoins: UK-only issuance and lifecycle control
The paper is similarly blunt on stablecoins: issuance will only be considered legal if the issuer is established in the U.K. and controls the entire lifecycle — from initial offers and redemptions to maintaining reserves.
Key dates and next steps
- Consultation period: FCA requests views until June 3, 2026.
- Final rules: the FCA plans to publish policy statements this summer and final perimeter guidance in September.
- Transition to FSMA approvals: all crypto-service firms must migrate from the current AML registration process to a stricter approval regime under the Financial Services and Markets Act (FSMA).
- Application window: firms that want to continue operating under the new regime must apply between Sept. 30, 2026 and Feb. 28, 2027. Only applicants who submit within this window will benefit from “savings provisions” that allow them to keep operating while the FCA decides their applications.
- Missing the deadline risks fines, suspensions or permanent closures.
What this means in practice
The guidance tightens the perimeter around who counts as a custodian and who must obtain full FCA permissions. Exchanges, wallet providers, certain software platforms, staking facilitators, node operators and stablecoin issuers should review settlement timings, custody arrangements, feature roadmaps and corporate structures now — small operational details (like a >24-hour hold during settlement or an added dashboard) could change a firm’s regulatory status overnight.
As the FCA put it: the new perimeter is intended “to strengthen protections for consumers and support fair, transparent and orderly markets as the sector matures.” For many crypto businesses operating in or into the U.K., the next few months will be a crucial period to assess exposure and prepare applications.
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