UK crypto investors declared £1.38B in gains, half from 240 people
HMRC's first crypto-specific capital gains tax data reveals £1.38B in gains, with 240 investors accounting for £717M. New OECD reporting rules begin in 2027.
HMRC published its first crypto-specific capital gains tax data on Friday, reporting £1.38 billion in declared gains from 17,600 individuals. Of that total, 240 investors who each reported more than £1 million in gains accounted for £717 million.
The figures come from a dedicated crypto section added to Self Assessment returns for the 2024 to 2025 tax year. They capture only declared disposals liable for Capital Gains Tax, not every crypto transaction in Britain. The data therefore establishes a baseline before HMRC begins receiving direct reports from crypto providers.
Under the OECD's Cryptoasset Reporting Framework, UK crypto businesses started collecting customer and transaction information in January 2026. HMRC expects to receive provider reports in 2027, giving the tax authority a separate dataset to compare against taxpayer declarations. That will increase its ability to spot discrepancies between reported gains and activity recorded on exchanges.
The reporting timetable does not change existing obligations. Crypto owners with reportable gains or income for the 2025 to 2026 tax year must file a Self Assessment return and pay tax due by Jan. 31, 2027.
HMRC separately estimated that its crypto compliance and education work generated £168 million of additional Capital Gains Tax during 2024 to 2025. The capital-gains figures exclude other crypto-related tax liabilities such as income from employment, mining, staking, or lending, which can fall under Income Tax rules instead.
The new statistics give HMRC a declared baseline before standardised third-party reporting begins. From 2027, the agency will increasingly be able to compare what crypto investors say they earned with what platforms say they did, a shift with implications for crypto market analysis.
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