HMRC taxes most UK crypto activity under two separate frameworks for the 2025/26 tax year, and getting them mixed up is one of the most common filing mistakes. Capital gains apply when you dispose of tokens, whether that means selling for sterling, swapping one coin for another, spending crypto on goods, or gifting it to someone outside a marriage or civil partnership. Income tax kicks in when you receive tokens as a reward for doing something: mining, validator duties, airdrop activity, referral bonuses, or being paid in crypto for work.
The distinction matters because the tax rates differ and so does the cost basis calculation. When you receive, say, staking rewards, the sterling value at receipt counts as income first. Any gain or loss you make when you later sell those tokens is then a separate capital event on top.
Share matching and pooling rules catch people off guard
UK investors can't pick which coins they're selling the way some US traders can. HMRC applies share-matching rules, the same framework used for equities, to crypto. Same-day acquisitions match first, then any purchases made in the 30 days after the sale, and finally the pooled average cost of everything else. Buy back tokens within a month of selling at a loss and that loss gets neutralised against the new acquisition, not banked against other gains.
On the reporting side, pressure is building. HMRC is constructing a CARF reporting service ahead of the first international data exchanges, currently targeted for 2027 under the OECD's Crypto-Asset Reporting Framework. UK-based exchanges will be required to submit user data to HMRC, with a 31 May 2027 deadline in view. That makes accurate record-keeping now, not at filing time, the practical priority.
Stablecoin taxation is also set to shift. From April 2027, the government plans to treat eligible stablecoins more like money than like property, which would change how disposals are calculated for those assets. The exact scope is still being legislated, but anyone holding significant stablecoin positions should watch the GOV.UK guidance as it develops.
DeFi remains the grey zone. Wrapping, bridging, or depositing into a protocol can each be a disposal if you end up with a legally distinct asset or if beneficial ownership transfers. HMRC's Cryptoassets Manual covers these edge cases, and the Capital Gains Manual now explicitly cross-references it. The safest move: log the transaction mechanics and the legal form of whatever you received, every time.
This article is informational only and does not constitute financial or tax advice. Always consult a qualified tax professional before filing.
