UK's New Crypto Regulations: A 24-Hour Deadline That Could Catch Firms Off Guard

The UK's Financial Conduct Authority has unveiled proposed crypto rules that could significantly broaden the definition of custody, potentially impacting platforms and software providers that do not consider themselves custodians. The FCA's Cryptoasset Perimeter Guidance, published recently, highlights several technical traps for firms handling clients' crypto assets. A key aspect of the rules is the 24-hour threshold for custody, where any firm or crypto platform holding client assets for more than a day during trade settlement will likely be classified as a regulated custodian, requiring a full safeguarding license. Validators and node operators must also exercise caution, as providing 'added value' features such as user dashboards or yield tools could lead to the loss of their pure tech exemption, necessitating full approval for arranging staking. The regulator has emphasized that its new perimeter is designed to enhance consumer protections and support fair, transparent, and orderly markets as the sector evolves. Notably, the FCA has addressed the issue of 'shadow custody' for the first time, clarifying that if a crypto service provider can theoretically override a client's authority, it will be considered a custodian, regardless of whether it guarantees not to exert that power. The document also notes that the use of smart contracts, public blockchains, or decentralized elements does not determine the regulatory perimeter or exempt an arrangement from regulation. For stablecoin issuers, the rules are clear: issuance is only permitted if the issuer is established in the UK and manages the entire lifecycle, from initial offering to redemption and reserve maintenance. The FCA is seeking feedback on these proposals until June 3, 2026, and plans to publish finalized rules in policy statements this summer, followed by the final perimeter guidance in September. The new regulations will require all entities providing crypto services to transition from the current money-laundering registration system to a stricter approval regime under the UK's Financial Services and Markets Act. Firms intending to continue operating under the new regulations must apply within a five-month window, from September 30, 2026, to February 28, 2027, or risk facing potential fines, suspensions, and permanent closures. Only those who apply during this period will be eligible for 'savings provisions' that allow them to continue operating while the regulator reviews their application.