240 UK Crypto Holders Declared Over £1 Million Each in Gains, and HMRC Is Just Getting Started

Two hundred and forty people in the UK reported more than £1 million each in crypto capital gains in the latest annual tax data, and that number is almost certainly the tip of the iceberg.

The figures, pulled from HMRC's latest release, confirm what many in the industry have quietly feared: the taxman has been watching, counting, and building a picture of who made serious money in crypto, and who hasn't filed.

This Is Not a Drill

HMRC has been systematically tightening its grip on crypto for years. It compelled exchanges to hand over customer data. It launched nudge letter campaigns targeting holders who may have under-reported gains. It updated its guidance repeatedly to close loopholes around DeFi, staking rewards, and airdrops.

The 240 high-earners who did file are not the story. The story is everyone who didn't.

With £1 million-plus gains now on record, HMRC has a baseline. It knows what a significant crypto year looks like. Cross-reference that against exchange data, blockchain analytics firms the agency already works with, and self-assessment records, and you have a very efficient net for catching non-filers.

The Broader Context

The UK is not operating in isolation here. Across Europe and the G20, tax authorities are coordinating under the Crypto-Asset Reporting Framework, or CARF, which mandates automatic exchange of crypto transaction data between countries starting as early as 2026 for early adopters.

That means UK holders with overseas exchange accounts, cold wallets, or unreported DeFi yields have a narrowing window before cross-border reporting makes non-compliance nearly impossible to hide.

The 240 figure also raises a separate question: how many more people had gains above £1 million and simply didn't report them? Given the bull run cycles of 2020 and 2021, tax professionals working in this space believe significant under-reporting is widespread across all gain brackets, not just the top tier.

What Crypto Holders Should Watch and Do Right Now

If you made meaningful gains in any tax year since 2017 and have not filed accurately, the risk profile just changed. HMRC publishing this data is a signal, not background noise.

Three immediate steps matter: pull your full transaction history from every exchange and wallet you have used, engage a crypto-specialist accountant before HMRC contacts you rather than after, and understand that voluntary disclosure almost always results in lower penalties than being caught.

The 240 people who reported honestly are not the cautionary tale. The ones who didn't are.