The UK's HM Revenue and Customs (HMRC) sent 81,172 cryptocurrency tax warning letters in the 2025/26 financial year, a 25% increase from the previous year. The surge in these "nudge letters" comes as HMRC targets undeclared liabilities from the 2022–2025 bull run. To combat noncompliance, the UK implemented the Cryptoasset Reporting Framework in January 2026, which will mandate platform reporting by May 2027 and connect with a global network of 52 jurisdictions to expose offshore accounts.
HMRC crypto tax warning letters
- ▪The UK's HM Revenue and Customs sent 81,172 tax warning letters, emails, and text messages to cryptocurrency investors during the 2025/26 financial year.
- ▪The figures detailing HM Revenue and Customs' warning letters were obtained from a Freedom of Information request by the accounting firm UHY Hacker Young.
- ▪The 81,172 warning communications sent by HM Revenue and Customs in 2025/26 represent a 25% increase from the 64,982 warnings sent in the 2024/25 financial year.
- ▪HM Revenue and Customs recovered more than £8.3 million through settlements in the 2024/25 and 2025/26 financial years, with average recovery per case rising from £12,500 to £21,600.
- ▪The number of cryptocurrency tax warning letters sent by HM Revenue and Customs rose from 27,714 in the 2023/24 financial year to 81,172 in 2025/26.
- ▪HM Revenue and Customs suspects that undeclared tax liabilities arose from cryptocurrency gains accumulated as digital asset prices increased between late 2022 and 2025.
UK cryptocurrency tax obligations
- ▪UK taxpayers may owe Capital Gains Tax when they sell cryptocurrency for fiat currency, exchange one token for another, purchase goods with crypto, or give tokens to another person.
- ▪Beginning in April 2027, a revised UK framework will grant qualifying decentralized finance lending and automated market-making arrangements no-gain, no-loss treatment until an economic disposal occurs.
- ▪UK residents are generally taxed on worldwide income and gains, meaning profits generated through offshore cryptocurrency platforms remain subject to UK tax obligations.
- ▪Cryptocurrency received through employment, mining, staking, lending, or decentralized finance arrangements may create Income Tax and National Insurance obligations for UK taxpayers.
Cryptoasset Reporting Framework implementation
- ▪UK cryptocurrency service providers must submit their first reports covering 2026 transaction activity to HM Revenue and Customs between January 1 and May 31, 2027.
- ▪Under the UK's Cryptoasset Reporting Framework, customers who fail to provide required identifying details to platforms can face financial penalties of up to £300.
- ▪The UK implemented the Cryptoasset Reporting Framework on January 1, 2026, requiring covered service providers to collect customer identifying information and transaction data.
- ▪HM Revenue and Customs estimates that the new Cryptoasset Reporting Framework measures could raise as much as £315 million in tax revenue by April 2030.
International tax data exchange expansion
- ▪The OECD's Cryptoasset Reporting Framework will enable automatic information exchanges, with 52 jurisdictions expected to provide data to HM Revenue and Customs in 2027.
- ▪The European Union's DAC8 directive, which came into force on January 1, 2026, requires member states to exchange collected cryptocurrency transaction data by September 30, 2027.
- ▪An additional 15 jurisdictions, including Singapore, Switzerland, and Gibraltar, are expected to join the international tax data exchange framework in 2028.
Tax evasion penalties
- ▪Unpaid domestic cryptocurrency tax in the UK can attract penalties reaching 100% of the tax due, plus accrued interest charges, depending on taxpayer conduct and disclosure timing.
- ▪Taxpayers who voluntarily report unpaid cryptocurrency liabilities through the UK's Cryptoasset Disclosure Service may face penalties limited to 30% of the unpaid tax.
Story comments
Loading comments…