The first official HMRC statistics on UK crypto capital gains reveal extreme concentration: 240 taxpayers, less than 2% of all declarants, captured over half of taxable crypto gains in fiscal year 2024-2025. An unprecedented snapshot of a sharply polarised British market, dominated at the top by crypto fortunes and at the base by modest holders.
🔑 Key Takeaways
- 240 individuals each reported over £1M in crypto gains in 2024-2025
- This group concentrated £717M of gains out of £1.38B total (52%)
- 87% of crypto declarants were men, capturing 93% of all gains
- HMRC issued 81,000 warning letters to investors suspected of underpayment
- The UK is implementing the OECD CARF framework from January 2026, with data received from 2027
Record Concentration in Just 240 Tax Returns
On August 27, 2026, HM Revenue and Customs (HMRC) published for the first time detailed statistics on cryptoasset capital gains in the United Kingdom. The figures, covering fiscal year 2024-2025, paint a striking picture of wealth concentration in the British crypto market.
Out of 17,600 individuals who declared cryptoasset disposals, only 240 people reported gains exceeding £1 million each. This ultra-narrow group, representing barely 1.4% of declarants, collectively recorded £717 million in taxable gains — more than half (52%) of the national total.
All declarants generated disposal proceeds of £13.8 billion against taxable gains of £1.38 billion, for an average gain of £78,000 per individual. The 240 crypto millionaires, by contrast, posted average gains of nearly £3 million each.
The Profile of a UK Crypto Millionaire
Beyond the headline numbers, the HMRC data reveal a demographic profile distinct from traditional capital gains declarants. The British crypto market remains a largely male and young universe.
Men account for 87% of crypto gain declarants, compared with only 56% for the broader Capital Gains Tax (CGT) population. They capture 93% of declared gains, confirming a gender imbalance even more pronounced than in other asset classes.
Generationally, 54% of crypto declarants are aged 25 to 44, a share three times higher than that observed in the overall CGT taxpayer base (17%). In total, 81% of declarants are 54 or younger.
However, the 25-44 cohort shows a paradox: it generated 71% of disposal proceeds but only 45% of gains, suggesting intense trading activity for proportionally lower returns than older declarants.
| Profile | Crypto Declarants | Overall CGT Population |
|---|---|---|
| Men | 87% | 56% |
| Aged 25-44 | 54% | 17% |
| Aged 54 or under | 81% | N/A |
| Share of gains captured (men) | 93% | N/A |
The Other Reality: 65% of Declarants Under £25,000
If the top of the pyramid captures the headlines, the base of the UK crypto market remains dominated by small holders. 65% of crypto taxpayers reported gains below £25,000. They accounted for only 7% of total gains and 8% of disposal proceeds.
This hourglass snapshot illustrates the polarisation of the market: a minority of very large winners coexists with a majority of smaller investors with more modest gains, often from one-off operations or limited initial positions.
« Tax is due on gains from cryptoassets just like any other gains, and we want to make sure people making gains from crypto know the tax they owe. This important work supports the government’s efforts to close the tax gap, so everyone pays their fair share towards vital public services. »
James Murray, Financial Secretary to the Treasury
Compliance Push and the CARF Framework
HMRC is not only publishing figures — the tax authority is actively stepping up compliance actions. As part of its strategy to combat crypto tax evasion, it has sent 81,000 warning letters to investors suspected of underpaying their taxes. In parallel, HMRC ran awareness campaigns on social media and published new guides on GOV.UK since late 2023.
According to HMRC, these compliance and education efforts generated an additional £168 million in Capital Gains Tax for fiscal year 2024-2025 alone — a sizeable contribution in a context where UK-wide CGT hit a record £127 billion, generating £24.2 billion in tax revenue.
Internationally, the UK began implementing the Cryptoasset Reporting Framework (CARF), developed by the OECD, in January 2026. The standard requires cryptoasset service providers to automatically transmit client information to tax authorities. HMRC will start receiving this data in 2027. Non-compliant providers face penalties of up to £300 per user.
« We want to make it as easy as possible for people to understand and meet their tax obligations in relation to cryptoassets. With new international reporting rules coming into force, it is more important than ever that people check if they are paying the right tax. »
John-Paul Marks, Permanent Secretary and Chief Executive of HMRC
Reporting Obligations and the DeFi Reprieve
For UK holders, several events can trigger a tax obligation: selling cryptoassets, swapping them for another digital asset, using them to pay for goods or services, or gifting them to another person (other than a spouse, civil partner, or charity). Income Tax and National Insurance Contributions can apply to cryptoassets received through employment, self-employment, mining, staking, or lending.
Holders must declare any income or gain above the tax-free threshold for fiscal year 2025-2026 through their Self Assessment return before the January 31, 2027 deadline. Those with overdue tax bills can regularise their situation via the Crypto Disclosure Service on GOV.UK.
The UK Treasury has also announced plans to defer the application of Capital Gains Tax on DeFi loans and liquidity pool deposits until the actual disposal of the assets. The measure aims to clarify the tax treatment of decentralised finance, which has so far remained a source of uncertainty for investors and protocols operating in the UK.
Conclusion: Between Polarisation and Tighter Surveillance
The first official HMRC statistics confirm that the UK crypto market, although still modest in absolute value compared with equity markets, exhibits an extremely concentrated gains structure. With 240 crypto millionaires capturing more than half of taxable gains, the sector shows a polarisation comparable to that observed in tech or venture capital.
In the medium term, the entry into force of the CARF framework and the scaling up of dedicated reporting tools should significantly enhance HMRC’s ability to track under-declarations. International convergence of crypto tax transparency rules could also reduce the attractiveness of opaque jurisdictions for large UK holders. The publication of these inaugural statistics marks the beginning of a new era of tax visibility for the UK crypto ecosystem.
Sources
This article is published for informational and educational purposes only. It does not constitute investment advice. Do your own research (DYOR) before making any decision.
