UK's New Crypto Regulations: A 24-Hour Window to Avoid Regulatory Pitfalls

The UK's Financial Conduct Authority has unveiled proposed crypto regulations that may broaden the definition of custody, potentially ensnaring platforms and software providers that do not identify as 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, where any firm or platform holding client assets for more than a day during trade settlement may be classified as a regulated custodian, necessitating a full safeguarding license. Validators and node operators must also exercise caution, as the regulator has warned that providing 'added value' features, such as user dashboards or yield tools, will lead to the loss of their pure tech exemption, requiring them to seek approval for arranging staking. The FCA has stated that its new perimeter provides the tools to strengthen consumer protections and support fair, transparent, and orderly markets as the sector matures. Notably, the regulator has addressed the 'shadow custody' issue for the first time, clarifying that if a crypto service provider can theoretically override a client's authority, it is 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 decentralization elements does not determine the perimeter position or exempt an arrangement from regulation. For stablecoin issuers, the rules are clear: issuance is only permissible if the issuer is established in the UK and manages the entire lifecycle, from initial offering to redemption and reserve maintenance. The FCA has invited views on these proposals until the consultation closes on June 3, 2026, and intends to publish finalized rules in policy statements this summer, followed by the final perimeter guidance in September. The roadmap requires all entities providing crypto services to transition from the current money-laundering registration systems to a stricter approval regime under the UK's Financial Services and Markets Act. Firms intending 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 awaiting those who miss the deadline. Only applicants during this period will benefit from the 'savings provisions' allowing them to continue operating while the regulator deliberates.