UK FCA Crypto Rules vs MiCA: Where the Post-Brexit Regimes Diverge

Part 1 of our "Global Crypto Regulation Map" series — how the major jurisdictions are drawing their crypto rules, and where a firm operating across borders gets caught between them. We start with the two regimes closest in ambition and furthest in detail: the UK's incoming FCA framework and the EU's MiCA.

For years the UK and EU regulated crypto in roughly the same shorthand: register for AML, and otherwise wait. That era is ending on both sides, but on different timetables and with different architecture. MiCA is live and prescriptive; the UK's regime is built and dated but not yet in force. A firm serving both markets now has to comply with one fully-applicable rulebook and prepare for a second that diverges from it in deliberate ways.

The Timelines Are Offset

MiCA is already in force, with its CASP authorisation, stablecoin (EMT/ART), and conduct rules applying now. The UK is a step behind by design. The FSMA 2000 (Cryptoassets) Regulations 2026 were made by Parliament in February 2026, bringing crypto activities inside the FCA's perimeter for the first time. The FCA's authorisation gateway opens on 30 September 2026, firms must apply by 28 February 2027, and the full regime comes into force around October 2027. For a cross-border firm, that means the EU obligations bite today and the UK ones bite on a known but later clock — the planning error is treating "UK is coming" as "UK is far away."

Where the Substance Diverges

• Architecture — MiCA is a single, bespoke EU regulation with its own CASP licence. The UK instead folds crypto into its existing FSMA framework as a set of new regulated activities, leaning on the established authorisation machinery rather than a standalone code.
• Stablecoins — MiCA splits them into EMTs and ARTs with detailed reserve and issuer rules already in force. The UK creates its own category, the UK Qualifying Stablecoin (UKQS), with FCA authorisation for issuance and safeguarding — similar goals, different definitions and thresholds.
• Activity scope — the UK's regulated activities (issuing stablecoins, safeguarding, dealing, arranging, operating a trading platform) are drawn on UK terms and will not map one-to-one onto MiCA's service categories.
• Conduct and territoriality — each regime defines who is in scope by its own connecting factors, so the same customer base can pull a firm into one, the other, or both, on non-identical tests.

What Stays Common

Underneath the divergence, the on-chain controls are largely shared. Both regimes expect sanctions screening, Travel Rule compliance, transaction monitoring, and safeguarding of client assets — the same forensic and screening capabilities, applied against the same chains. The divergence is in licensing, definitions, and reporting format, not in the fundamental risk question of "where did these funds come from and where are they going."

How BA helps. The screening, monitoring, and Travel Rule tooling a firm needs is jurisdiction-agnostic at the data layer — the same 1B+ label graph and 80+ chain coverage satisfy the on-chain controls under both MiCA and the UK regime, with the reporting mapped to each. The regulatory map changes; the underlying question of fund provenance doesn't. For the EU baseline, see the MiCA Compliance Guide.

Next in the series: Singapore MAS vs EU MiCA, where a third major regime — built earlier and on different principles — offers a useful contrast to both.