UK Crypto Tax Data Reveals 240 Millionaires and £1.38B in Gains
HM Revenue & Customs revealed on August 27 that 17,600 individuals reported taxable cryptoasset disposals in the 2024-2025 tax year, generating £13.8 billion in proceeds and £1.38 billion in capital gains.
Summary:
- HMRC recorded £1.38 billion in taxable crypto gains for 2024-2025.
- Just 240 taxpayers accounted for more than half of the reported total.
- Crypto-to-crypto trades can trigger tax without any fiat withdrawal.
- CARF will give HMRC transaction data directly from crypto providers from 2027.
The figures provide the clearest official picture yet of realized crypto wealth in the UK, just as new international reporting rules are preparing to give tax authorities significantly greater visibility into investor activity.
A small group generated more than half of all crypto gains
The distribution behind the headline numbers is unusually concentrated. HMRC identified 240 people with crypto gains exceeding £1 million, and together they reported £717 million.
That group represented only about 1.4% of taxpayers in the dataset but generated roughly 52% of all reported gains. Once those 240 investors are removed, approximately £663 million remains across 17,360 people, producing an average of about £38,200 rather than the overall £78,000 figure.
HMRC could isolate these figures because a dedicated cryptoasset section was added to the Self Assessment capital gains return. The government also estimates that its crypto compliance and education work generated an additional £168 million in Capital Gains Tax during 2024-2025.
Why crypto tax can arise before investors cash out
UK tax treatment focuses on disposals, not simply withdrawals to a bank account. Selling tokens for cash is one disposal, but exchanging one cryptoasset for another, spending tokens on goods or services and certain transfers to other people can also qualify.
Moving assets between wallets while retaining beneficial ownership generally does not.
Consider an investor who bought ETH for £2,000 and later exchanged it for USDC worth £3,500. Before allowable costs and other adjustments, the ETH disposal creates a £1,500 gain even though the investor never converted the position into pounds.
This matters for active portfolios because switching between Bitcoin, altcoins and stablecoins can produce a sequence of taxable events that is not visible from fiat deposits and withdrawals alone.
Capital Gains Tax applies to the resulting gain rather than gross proceeds. Acquisition costs and qualifying expenses can reduce the taxable amount, while losses and available reliefs can also affect the final liability.
For 2026-2027, individuals have a £3,000 annual Capital Gains Tax exemption. Gains above the available allowance are charged at 18% to the extent they fall within the relevant basic-rate band and 24% above it.
READ MORE: UK Puts Stablecoin Innovation Into Bank of England’s Mandate
Crypto earned through employment, self-employment, mining, staking or lending can fall under different rules, including Income Tax and potentially National Insurance rather than being treated solely as capital gains.
CARF will give HMRC a second view of crypto activity
The larger enforcement change comes from the OECD’s Crypto-Asset Reporting Framework, which the UK began implementing in January 2026.
Rather than relying only on what taxpayers declare, CARF requires qualifying cryptoasset service providers to collect and report customer and transaction information. The first reports will cover activity from January through December 2026 and must be submitted between January 1 and May 31, 2027. Providers can face penalties of up to £300 per user for failures including missing, late, inaccurate or incomplete reports.
The practical effect is reconciliation. HMRC will increasingly be able to compare information supplied by crypto platforms with figures declared through the tax system, making inconsistencies easier to identify.
Investors will need records that explain every disposal
CARF does not calculate a taxpayer’s liability, so investors remain responsible for establishing their own gains, losses and allowable costs.
Records should therefore connect exchange data with activity that may not be obvious from a single platform. Useful documentation includes transaction dates, quantities, token types, sterling valuations, acquisition costs, platform or network fees and transfers involving self-custody addresses.
That last category can be particularly important. A withdrawal from an exchange into a personally controlled wallet may look like an outbound transaction in platform records, but it generally does not create a disposal if beneficial ownership remains unchanged. Investors need enough documentation to establish that continuity.
Staking and lending can require closer analysis because tax treatment depends partly on the structure of the arrangement and whether beneficial ownership changes. Investors using several exchanges, wallets and DeFi protocols therefore face a recordkeeping problem that is considerably broader than downloading a single annual trading statement.
The Next UK Crypto Tax Deadline Comes Before CARF Reporting
The immediate deadline remains January 31, 2027, when taxpayers must declare relevant crypto income and gains for the 2025-2026 tax year through Self Assessment and pay tax owed.
CARF then introduces a separate reporting cycle. Between January and May 2027, HMRC will receive its first standardized provider submissions covering the previous calendar year. That dataset will not replace Self Assessment, but it will give the authority an independent record against which declarations can increasingly be tested.
For taxpayers with historic omissions, HMRC already operates a Cryptoasset Disclosure Service for reporting unpaid tax. The government’s latest statistics indicate why that channel may receive greater attention: HMRC now has a dedicated crypto dataset, while the next stage adds information collected directly from the businesses handling transactions.
The information presented in this article is intended for informational purposes only and should not be interpreted as financial, investment, or trading advice. Coinspress.com does not promote or advocate for any particular investment strategy, asset, or cryptocurrency project. Cryptocurrency markets are highly volatile and unpredictable – always perform your own research and seek guidance from a qualified financial professional before making any investment decisions.
Kosta Gushterov
Reporter at CoinsPress
Kosta has reported on cryptocurrency markets and blockchain infrastructure since 2020, bringing over six years of hands-on experience in the crypto industry built through daily tracking of markets, trends, and emerging blockchain developments. Specializing in Bitcoin on-chain analysis, institutional ETF flows, and digital asset price action, his work has been cited by other news agencies and consistently covers market developments with a focus on data-driven reporting across Bitcoin, Ethereum, Solana, and XRP. Over the years, Kosta has contributed to multiple crypto media outlets in different regions, authoring over 6,000 articles across the sector. His reporting spans cryptocurrency markets and the broader fintech industry, tracking not only price action but also the technological and regulatory forces shaping the ecosystem. To support his analysis, Kosta actively leverages on-chain data and metrics from leading platforms such as Santiment, Glassnode, and CryptoQuant, enabling deeper, evidence-based market insights. He believes in the power of transparency and the data that underpins the blockchain ecosystem. His academic background in Marketing Management from Denmark further complements his analytical approach, adding a strong understanding of communication strategy and content positioning to his work.
