UK Crypto Tax Explained: What You Owe HMRC in 2026
HMRC has made crypto tax a priority — and ignorance is not a defence. Here's everything UK crypto holders need to know about Capital Gains Tax, Income Tax, and how to report correctly.
⚠️ Important: This guide is for general information only and is not tax advice. Tax rules are complex and change frequently. Always consult a qualified tax adviser or accountant for your personal circumstances.
The basics: how HMRC treats crypto
HMRC does not treat cryptocurrency as currency. It treats it as a capital asset — similar to shares or property. This means:
- Buying and holding crypto is not taxable
- Selling, trading, or spending crypto can trigger a tax liability
- You must report gains above your annual allowance to HMRC
HMRC has been actively collecting data from UK crypto exchanges and sending "nudge letters" to taxpayers they believe have unreported crypto gains. They have data-sharing agreements with major exchanges including Coinbase, Kraken, and Binance.
Capital Gains Tax on crypto
When you sell or dispose of crypto at a profit, you may owe Capital Gains Tax (CGT) on the gain — not the total amount received, just the profit above what you paid.
CGT annual exempt amount (2026/27): £3,000 — gains below this threshold in a tax year are completely tax-free.
| Taxpayer | CGT rate on crypto gains | Annual exempt amount |
|---|---|---|
| Basic rate (20% income tax) | 18% | £3,000 |
| Higher rate (40% income tax) | 24% | £3,000 |
| Additional rate (45%) | 24% | £3,000 |
Note: CGT rates on crypto were increased in the October 2024 Autumn Budget and apply to disposals on or after 30 October 2024.
Income Tax on crypto
Some crypto activity is taxed as income, not capital gains. This applies when you:
- Mine cryptocurrency — rewards from mining are taxed as income at the time of receipt
- Receive crypto as payment — for example, as a salary or for services rendered
- Earn staking rewards — HMRC treats most staking rewards as miscellaneous income
- Receive airdrops — if received in exchange for a service, treated as income
Income is taxed at your marginal rate (20%, 40%, or 45%) in the tax year you receive it. The value is calculated in GBP at the time of receipt.
What counts as a taxable event?
- Selling crypto for GBP or any other fiat currency
- Trading one cryptocurrency for another (e.g. swapping BTC for ETH)
- Spending crypto on goods or services
- Gifting crypto to someone other than your spouse or civil partner
- Receiving crypto as payment for work
- Staking rewards and mining income (as income)
What is NOT a taxable event?
- Buying crypto with GBP and holding it
- Transferring crypto between your own wallets
- Gifting crypto to your spouse or civil partner
- Donating crypto to a registered UK charity
- Holding crypto — simply owning it does not trigger tax
Common mistake: Many people think swapping Bitcoin for Ethereum isn't taxable because no GBP changed hands. It is. HMRC treats it as a disposal of Bitcoin and an acquisition of Ethereum — any gain on the Bitcoin is taxable at that point.
How to calculate your gain
Your gain is the difference between what you received for your crypto and what you paid for it (your "cost basis").
📊 Simple example
If you've bought the same coin at multiple prices (which most people have), HMRC uses a specific calculation method called the Section 104 pool rule, which averages your cost basis across all purchases. This gets complicated quickly with frequent traders — crypto tax software like Koinly or CoinTracker can automate the calculation.
How to report to HMRC
You must report crypto gains if:
- Your total capital gains in the tax year exceed £3,000, OR
- The total proceeds from crypto disposals exceed £50,000 (even if you made a loss)
Reporting is done via a Self Assessment tax return. If you don't normally file a Self Assessment, you'll need to register with HMRC. The deadline is 31 January each year for the previous tax year (April–April).
What records to keep
HMRC requires you to keep records for at least 4 years. For each transaction, record:
- The date of the transaction
- The type of crypto (BTC, ETH, etc.)
- The amount in GBP at the time (use the exchange rate on the day)
- What you received in exchange
- Any fees paid
- The wallet addresses or exchange used
Most exchanges let you download your full transaction history as a CSV file. Download yours regularly and store it safely — you may need it years later.
Keep records from day one, report honestly, and don't ignore HMRC.
UK crypto tax is complex but manageable if you stay organised. The most important steps: keep records of every transaction, understand that swapping between coins is a taxable event, and report via Self Assessment if your gains exceed £3,000. If you're unsure, speak to a qualified accountant with crypto experience — the cost is usually less than the penalty for getting it wrong.
Disclaimer: This article is for general information only. Tax rules are complex and subject to change. Always consult a qualified tax adviser for your personal situation. ClearYield is not authorised to give tax advice.