Crypto Tax: HMRC Can See Your Gains From January 2026
Owning crypto was never tax-free. Selling a coin, swapping one for another, or being paid in crypto can all trigger Capital Gains Tax or Income Tax, and that has been true for years. What changes now is not the tax but the visibility. Under the UK's Cryptoasset Reporting Framework, UK cryptoasset service providers began collecting user data on 1 January 2026, with their first reports to HMRC due between 1 January and 31 May 2027, covering the 2026 calendar year. Providers must record each user's name, address, date of birth, tax residence and, for UK residents, their National Insurance number or Unique Taxpayer Reference, with penalties of up to £300 per user for late or inaccurate reporting. This is a reporting regime on liabilities that already existed, not a new tax: the rules were made in secondary legislation on 24 June 2025 and came into force on 1 January 2026, so this is confirmed and already live, not a proposal. HMRC expects the measure to raise an extra £315 million over four years.
Here is the catch the headlines bury: reported to HMRC does not mean already declared by you. Gains are measured against a Capital Gains Tax annual exempt amount that has been frozen at £3,000, so even modest disposals can be chargeable. The Financial Conduct Authority estimates around 8% of UK adults, roughly 4.5 million people, now hold crypto. Many assumed it was invisible, or that a hobby-sized holding could never be taxable. The person really caught is not the sophisticated trader but the everyday holder or side-hustler who bought a little, sold or swapped some, and never thought to put it on a tax return.
- Is closing crypto's anonymity gap a fair catch-up with a market that was always taxable, or a trap for ordinary holders who never realised they owed anything?
- With the Capital Gains allowance frozen at £3,000 and roughly 4.5 million people holding crypto, who gets caught hardest, and is it fair that "reported" and "declared" are so easily confused?
- What should someone who has bought, sold or swapped crypto do now, before the first reports land in 2027? Do you have a client whose plans this would change? If so, please give as much colour and detail as possible.





