Do You Pay Tax on Crypto If You Haven't Sold It? (UK, 2025/26)

If you've been holding crypto and haven't sold any of it for pounds, you're probably wondering whether you owe HMRC anything at all. The good news first: most of the time, simply buying and holding doesn't cost you a penny in tax. You are not taxed for buying crypto, and you are not taxed for holding it, no matter how much it has gone up on paper. A gain only becomes real for tax when you dispose of the asset.

The catch is what HMRC counts as a disposal. "Cashing out" to your bank account is the obvious one, but it's only one of four. Swapping one coin for another, paying for something with crypto, and giving crypto away can all be disposals too. In each case HMRC works out a sterling value for the transaction, compares it to what the crypto cost you, and taxes the gain, even though no actual pounds ever hit your account.

This guide sets out, in plain terms, exactly what is and what is not a disposal in the UK for 2025/26, so you know when a Capital Gains Tax (CGT) liability has actually arisen.

Do you pay tax just for buying or holding crypto?

No. Buying crypto with pounds is not a taxable event. It simply sets your cost basis (the figure HMRC will later compare your sale value against). Holding it isn't taxable either, and there is no UK tax on unrealised gains: if you bought Bitcoin at £10,000 and it's now worth £40,000, you owe nothing until you do something with it. The UK also has no long-term-holding discount, so holding for years doesn't reduce the rate you eventually pay.

Moving crypto between your own wallets or exchange accounts is not a disposal either. HMRC's rule is about beneficial ownership: as long as you still own the coins throughout the transfer, nothing has happened for tax purposes. So sending Bitcoin from Coinbase to your own hardware wallet, or between two wallets you control, triggers no CGT, even though the blockchain records a transaction.

Two practical notes. First, any network/transfer fee you pay in crypto to move coins is itself a tiny disposal of that fee amount, though in practice it's usually negligible. Second, keep records of those internal transfers anyway. Without them, software (or HMRC) can mistake a wallet-to-wallet move for a sale and over-count your gains.

What counts as a taxable disposal?

HMRC lists four ways you "dispose" of crypto for Capital Gains Tax. Crucially, three of the four don't involve receiving any pounds at all, which is exactly why people get caught out. When you swap, spend or gift, HMRC treats you as having received the sterling market value of the crypto at that moment, and taxes the gain over your cost basis.

• Selling crypto for fiat (pounds, dollars, euros). The classic disposal, and the only one where money actually lands in your account.
• Swapping one crypto for another (a crypto-to-crypto exchange). Trading Bitcoin for Ethereum, or any token for a stablecoin like USDT, is a disposal of the coin you gave up, even though you never touched pounds. This is the single most-missed taxable event.
• Spending crypto on goods or services. Paying for something with crypto is a disposal at the crypto's market value on the day you spend it.
• Gifting crypto to another person, except a gift to your spouse or civil partner, which is a no-gain/no-loss transfer (no CGT at the point of the gift). Donations to a registered charity are also generally exempt.

For a swap, spend or gift, the disposal value is the GBP market value of the crypto at the time of the transaction, not what you originally paid, and not what it's worth today. Your taxable gain is that value minus your allowable cost (worked out using the Section 104 pool and the same-day / 30-day matching rules).

What about staking, airdrops and rewards I never bought?

Some crypto arrives without you buying or selling anything, and that's taxed on a different track. Staking rewards, mining and most lending/DeFi rewards are usually treated as income (Income Tax, not CGT), valued in pounds on the day you receive them. That same GBP value then becomes the cost basis if you later sell, swap or spend those coins, so you don't get taxed twice on the same value.

Airdrops are more nuanced. Many airdrops are treated as income on receipt. But where you received tokens without doing anything in return and not as part of a trade or business, the airdrop can fall outside Income Tax, and you'd then only face CGT when you eventually dispose of them. Because the right answer depends on exactly why you received the tokens, this is genuinely fact-dependent. If you're unsure how a specific airdrop should be treated, it's worth checking the HMRC guidance or a tax adviser rather than guessing.

Do I need to report it, and does HMRC know?

Having a disposal doesn't always mean you owe tax, but it can still mean you have to report. For 2025/26 you need to report to HMRC if either your total gains exceed the £3,000 annual exempt amount, or your total disposal proceeds exceed £50,000 in the year, even if your gain is small or you made a loss. Crypto goes in the dedicated cryptoassets section of the SA108 Capital Gains Summary (boxes 13.1–13.8); see our SA108 crypto boxes guide.

Key dates for the 2025/26 tax year: if you're not already in Self Assessment, register by 5 October 2026, then file and pay online by 31 January 2027.

On the "does HMRC know" question, increasingly the answer is yes. HMRC already receives data from UK exchanges and sends "nudge" letters to suspected crypto holders. Under the Crypto-Asset Reporting Framework (CARF), UK crypto firms begin collecting user and transaction data from 1 January 2026, with the first reports due to HMRC by 31 May 2027, and data shared between tax authorities internationally. The safe assumption is that your activity is visible, so report it accurately. If a loss-making or low-value year still trips the £50,000-proceeds rule, you still have to declare it.

Not sure whether your year's swaps and spends add up to a reportable gain? You can work it out for free with our crypto CGT calculator, uploading a CSV or entering trades by hand, and read how the figures are produced on our methodology page. For the bigger picture on how everything fits together, see the complete UK crypto tax guide.

Sources

• HMRC: Check if you need to pay tax when you sell cryptoassets
• HMRC CRYPTO22100: What is a disposal
• HMRC CRYPTO22110: Transferring tokens between wallets / ledgers
• HMRC CRYPTO22257: Crypto-to-crypto exchange example
• HMRC CRYPTO21200: Airdrops
• GOV.UK: Capital Gains Tax rates and allowances
• GOV.UK: Report and pay Capital Gains Tax
• GOV.UK: Self Assessment deadlines