FCA Crypto Rulebook Requires Exchange Data Sharing by October 2027

Published by James Harris on June 30, 2026June 30, 2026

Britain’s financial regulator published its final crypto rulebook on June 29, placing the UK alongside the EU as the only major jurisdictions with a fully integrated national framework covering trading platforms, custodians, stablecoin issuers, lenders, and staking providers. The authorization requirement takes effect October 25, 2027, but the application window opens September 30, 2026, and existing AML registrations do not carry over automatically.

The framework’s architecture is what separates it from prior regulatory attempts. Rather than layering crypto onto existing AML rules or carving out a narrow stablecoin perimeter, the FCA has merged prudential capital standards, market integrity requirements, and operational risk criteria into a single regime, treating crypto firms with expectations that increasingly resemble those applied to licensed financial institutions. The stablecoin coefficient was cut from 2% to 1% after industry pushback, a concession that reflects how much the EU’s MiCA framework has already shaped the competitive calculus: issuers that found MiCA’s reserve requirements onerous now have a second major jurisdiction setting the terms. Exchanges generating more than £10 million in annual turnover must share surveillance data across platforms, and any asset listed on an FCA-authorized venue falls under the same insider trading and market manipulation rules that govern listed securities. As Baker McKenzie notes, these market abuse obligations attach to the regulated activity itself, not only to FCA-authorized firms, which extends the practical reach of the rules across UK crypto markets broadly.

The stress-testing requirement is the detail most firms will underestimate: businesses must design their own severe-scenario tests and submit results to the FCA for scrutiny, per The Guardian, which creates an ongoing supervisory relationship rather than a one-time compliance checkbox.

The Competitive Pressure on Cross-Border Operators

For international firms already navigating MiCA compliance, the UK framework arrives as a second, parallel obligation rather than a substitute. Exchanges and custodians that built compliance programs around MiCA’s structure will find significant overlap, but the differences in capital treatment and stress-testing methodology mean dual licensing is a real operational cost. The timing also matters relative to the US, where federal crypto legislation including stablecoin rules through the GENIUS Act remains unresolved, leaving American competitors without an equivalent domestic framework. Firms that secured early positioning under MiCA, as WhiteBIT did through Austria’s Financial Market Authority, now face a similar first-mover calculation in the UK ahead of the application window.

Any crypto business intending to operate in or serve UK customers must submit an FCA authorization application between September 30, 2026 and February 28, 2027. That window is narrow enough that firms without compliance infrastructure already in place are likely already late.