UK crypto investors declared £1.38B in gains, but half came from just 240 people

HMRC has disclosed £1.38 billion in reported UK crypto gains, with just 240 investors accounting for more than half.

The figures mark the first time HM Revenue & Customs has published crypto-specific Capital Gains Tax data, giving the agency a formal baseline before new reporting rules begin supplying it with information directly from crypto providers.

For the 2024 to 2025 tax year, 17,600 individuals reported £13.8 billion of cryptoasset disposal proceeds and £1.38 billion of gains. Of that total, 240 people who each reported more than £1 million in gains accounted for £717 million.

The data comes from a dedicated crypto section added to Self Assessment returns. It therefore captures declared Capital Gains Tax-liable disposals rather than every crypto transaction in Britain and cannot show how much activity went unreported.

HMRC is building a second data trail

That limitation is set to narrow as the UK implements the OECD’s Cryptoasset Reporting Framework.

Crypto businesses covered by CARF began collecting customer and transaction information in January 2026, while HMRC expects to start receiving provider reports in 2027.

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