Crypto Tax Calculator United Kingdom

If you have sold, swapped or spent cryptocurrency in the UK, the profit is almost certainly subject to Capital Gains Tax. HMRC treats each token as an asset rather than money, so disposing of it is taxable in the same way as selling shares. This calculator applies the 2026/27 rules to your net gain, the annual exempt amount and then the 18% and 24% rates, and shows how much tax you owe and how your other income changes the answer.

How crypto is taxed in the UK

HMRC classes most cryptoassets as property held for investment. When you dispose of them you make a gain or loss equal to the proceeds minus the allowable cost, usually what you paid plus certain transaction fees. Only the gain above the £3,000 annual exempt amount is taxed. Below that you have nothing to pay, though you may still need to report large disposals. A disposal is about parting with the asset, so the tax applies whether or not you cash out to a bank account.

What counts as a disposal

Selling tokens for pounds is a disposal, and so are swapping one cryptoasset for another, paying for goods or services with crypto and giving it to anyone other than a spouse or civil partner. Every token-to-token swap on an exchange or decentralised protocol is a separate disposal, with the gain measured in pounds at the moment of the swap. A trader making hundreds of swaps a year can build up a large taxable gain without withdrawing a penny. Keep a record of the date, the value in pounds and the cost of every disposal.

The annual exempt amount and the two rates

The annual exempt amount, £3,000 for 2026/27, is deducted from your total gains before tax is worked out. The rest is the taxable gain, which is added on top of your income to decide the rate. The part that falls within your remaining basic rate band, up to £50,270, is taxed at 18%, and anything above it at 24%. If you have already used part of the exempt amount against other gains, such as shares, enter that so the calculator applies only what is left.

A worked example

You made a £20,000 gain on crypto during the year and have £40,000 of other taxable income. The £3,000 exempt amount comes off first, leaving £17,000 taxable. Your income uses up part of the basic rate band, leaving £10,270 below the £50,270 limit. That £10,270 is taxed at 18%, or £1,848.60, and the remaining £6,730 at 24%, or £1,615.20. The total Capital Gains Tax is £3,463.80. With a higher salary more of the gain falls in the 24% band; with a lower one, more is taxed at 18%.

How to use the calculator

Enter your total net crypto gain: proceeds minus allowable cost across all disposals in the year. That is enough for a quick estimate at the default income. For a sharper figure, open the advanced options and enter your other taxable income and any annual exempt amount already used elsewhere. The result shows the allowance applied, the part taxed at 18%, the part taxed at 24% and the total tax due, with a chart of how your gain divides.

Assumptions and limitations

This is a planning estimate, not a tax return. It uses the 2026/27 annual exempt amount, the 18% and 24% rates, the personal allowance and the basic rate limit, stored as parameters sourced from gov.uk and reviewed each tax year. It assumes you enter a correctly calculated net gain after HMRC’s pooling, same-day and 30-day rules, which can be involved for frequent traders. It does not handle losses carried forward, staking, mining or airdrop income taxed as income rather than gains, or other assets you dispose of in the same year. For more than a rough figure, check HMRC’s cryptoassets manual or speak to an accountant before you file.

About This Crypto Tax Calculator

Use this crypto tax calculator to get an instant, accurate estimate. The figures follow official GOV.UK guidance and every rate and threshold is kept up to date for 2026. Adjust the inputs above to match your situation, or browse all our calculators to plan your next step.