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HMRC Crypto Tax Rules UK 2026 — The Essentials
HMRC is clear: cryptocurrency is a capital asset in the UK, not a currency. This means Capital Gains Tax applies to most crypto transactions, and failure to report can result in penalties and interest. Here’s what every UK crypto investor needs to know in 2026.
What Triggers a Taxable Event?
You incur a CGT liability when you: sell crypto for GBP, trade one crypto for another (e.g. BTC for ETH), use crypto to buy goods or services, or receive crypto as income (e.g. staking rewards, mining, airdrops). You do NOT trigger CGT by: holding crypto, moving between your own wallets, or buying crypto with GBP.
Capital Gains Tax Rates 2026/27
As of April 2026, crypto CGT rates are: 18% for basic rate taxpayers, 24% for higher and additional rate taxpayers. Annual CGT allowance: £3,000 (reduced from £6,000 in 2023 and £12,300 in 2022). The allowance reduction makes accurate record-keeping even more important — gains above £3,000 must be reported.
How to Calculate Your Gain
Disposal proceeds minus cost basis (what you paid, including fees) = gain or loss. HMRC uses the “Section 104 pooling” method for crypto — you average the cost of tokens of the same type held. Software tools that handle this automatically include: Koinly, CoinTracker, TaxBit (all support UK HMRC format).
Reporting Requirements
Report crypto gains via Self Assessment tax return. Deadline: 31 January following the end of the tax year (so 2025/26 gains reported by 31 January 2027). HMRC is increasingly using data from UK-registered exchanges to identify unreported gains — this is not an area to ignore.
Consult a qualified tax adviser for personalised crypto tax guidance. HMRC guidance is at gov.uk/guidance/check-if-you-need-to-pay-tax-when-you-receive-cryptoassets
