UK Crypto Regulations: Hidden Pitfalls for Unwary Firms

The UK's Financial Conduct Authority has unveiled proposed crypto regulations that could significantly broaden the definition of custody, potentially ensnaring platforms and software providers that do not consider themselves custodians. The FCA's Cryptoasset Perimeter Guidance, published recently, outlines several technical pitfalls for firms handling client crypto assets. A key aspect of the rules is the 24-hour threshold for custody, whereby any firm or crypto platform holding client assets for more than a day during trade settlement may 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 may trigger the need for 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,' clarifying that crypto service providers who can theoretically override a client's authority are considered custodians, even if they guarantee not to exert that power. The guidance also stipulates that stablecoin issuers must be established in the UK and manage the entire lifecycle, from initial offering to redemption and reserve maintenance. The FCA is seeking feedback on these proposals until June 3, 2026, and intends to publish finalized rules in policy statements this summer, followed by the final perimeter guidance in September. The regulatory roadmap requires all entities providing crypto services to transition from the current money-laundering registration systems to a more stringent approval regime under the UK's Financial Services and Markets Act. Firms aiming to continue operating under the new regulations face a five-month application window from September 30, 2026, to February 28, 2027, with potential fines, suspensions, and closures for those who miss the deadline.