Crypto Tax UK: 2025/26 Guide

Under United Kingdom tax law, His Majesty's Revenue and Customs (HMRC) does not classify cryptocurrency as money or fiat currency. Instead, HMRC treats cryptoassets as capital assets, meaning that when you sell, trade, or spend them, any profits are subject to Capital Gains Tax (CGT) rather than Income Tax.

Key Takeaways: 2025/26 Crypto Tax UK

• Capital Gains Tax (CGT) Rates: Basic rate taxpayers pay 18% on crypto gains, while higher and additional rate taxpayers pay 24% for the 2025/26 tax year.
• Annual Exempt Amount: Individual taxpayers have a £3,000 tax-free capital gains allowance for the 2025/26 tax year.
• Reporting Threshold: You must report your transactions if your total capital gains exceed £3,000, or if your total disposal proceeds exceed £50,000.
• Self Assessment Deadlines: The paper return deadline is 31 October 2026, and the online filing and tax payment deadline is 31 January 2027.
• CARF Compliance: Starting 1 January 2026, cryptocurrency exchanges will share transaction and account details directly with HMRC under international transparency rules.

Do you pay tax when you sell crypto in the UK?

Yes, you generally pay Capital Gains Tax when you sell cryptocurrency in the United Kingdom if your total gains exceed your annual allowance. HMRC treats cryptoassets as personal capital assets, meaning any increase in value from when you acquired them is taxable upon disposal.

The applicable tax is calculated solely on your net gain, which is the difference between what the asset cost you to acquire and what you received when you disposed of it. Under standard UK tax guidelines, you do not pay income tax on investment sales unless your trading activity is deemed so frequent and organized that it constitutes a financial trade.

What counts as a disposal of cryptocurrency?

A disposal of cryptocurrency is any transaction where you cease to own a cryptoasset, which triggers a potential Capital Gains Tax calculation under HMRC rules. This encompasses a broad range of transactions beyond simply selling your digital assets for traditional government-issued currencies.

1. Selling crypto for fiat currency: Exchanging your tokens directly for Pound Sterling (GBP), US Dollars, or any other fiat currency.
2. Swapping one cryptocurrency for another: Trading digital assets directly, such as exchanging Bitcoin (BTC) for Ethereum (ETH), where the fair market value in GBP at the time of the swap determines your proceeds.
3. Spending crypto on goods or services: Using digital tokens directly to pay a business or individual for items, utilities, or contracting services.
4. Gifting crypto to another person: Transferring ownership of your assets to a third party, which is treated as a disposal at fair market value, unless the recipient is your spouse or civil partner.

Simply holding cryptocurrency in your private digital wallet, or transferring your tokens between wallets that you personally own, does not constitute a disposal. HMRC does not levy any taxes on these events because you retain full ownership of the assets throughout the process.

What are the UK crypto Capital Gains Tax rates?

The Capital Gains Tax rates on cryptocurrency gains are 18% for basic rate taxpayers and 24% for higher or additional rate taxpayers. These specific rates apply to all asset disposals completed during the 2025/26 tax year.

The UK government adjusted these percentages during the Autumn Budget on 30 October 2024. Because these changes were implemented prior to the start of the 2025/26 tax year, the new rates apply uniformly to all transactions throughout the entire 2025/26 tax year without any need to calculate mid-year splits.

How much crypto can you sell tax-free in the UK?

You can realize up to £3,000 in capital gains tax-free during the 2025/26 tax year by utilizing your individual Annual Exempt Amount. This allowance is a personal tax-free allocation granted to every UK tax resident for capital assets.

This annual allowance cannot be carried forward to subsequent tax years, meaning any unused portion of your £3,000 threshold expires if it is not utilized by 5 April 2026. If your cumulative capital gains across all taxable assets, such as shares and property, remain within this limit, you hold no CGT liability.

Married couples and civil partners can effectively double their tax-free threshold by transferring cryptoassets to each other before selling them. HMRC rules permit tax-free transfers between spouses, allowing a couple to combine their individual allocations to access a total of £6,000 in tax-free gains.

How do you calculate your crypto gains?

To calculate your cryptocurrency gains, subtract the allowable acquisition cost from your total disposal proceeds. If your disposal proceeds are higher than your original cost basis, the resulting figure is your taxable capital gain.

HMRC enforces strict matching guidelines to identify which specific tokens you are selling when you hold a shifting pool of assets. You must apply these share reorganisation statutory guidelines in the exact order listed below:

1. The Same-Day Rule: Match your disposal against any acquisition of the identical cryptocurrency made on that exact calendar day.
2. The 30-Day Rule (Bed-and-Breakfasting): Match your disposal against acquisitions of the same cryptocurrency made within the 30 days following your sale. This rule prevents investors from crystallising artificial tax losses and immediately rebuilding their positions.
3. The Section 104 Pool: Match your disposal against the average cost of all remaining tokens of that cryptocurrency held in a collective pool, adjusting the average price as you buy more.

Can you offset crypto losses against your gains?

Yes, you can offset your capital losses from cryptocurrency against taxable gains you make on other capital assets in the same tax year. This allowable offset reduces your overall net gain and subsequent tax bill.

If your total capital losses exceed your taxable gains for the year, you can carry the remaining losses forward to reduce your tax liabilities in future tax years. To do so, you must formally claim and report these losses to HMRC within four years of the end of the tax year in which the losses occurred.

When does Income Tax apply instead of Capital Gains Tax?

Income Tax applies when you receive cryptocurrency as earnings, rewards, or operational yields, rather than through personal investment appreciation. Under these circumstances, you must pay Income Tax and National Insurance contributions based on the sterling value of the tokens when you receive them.

When is the deadline to report and pay crypto tax?

You must report and pay any tax due on your cryptocurrency transactions via the standard UK Self Assessment system following the end of the tax year. The specific reporting deadlines depend on whether you file your tax returns paper-based or electronically.

If you file your Self Assessment using paper forms, HMRC must receive your return by 31 October 2026. For online filings, the final submission deadline and the deadline to pay all outstanding taxes is 31 January 2027.

You are legally required to file a tax return if your total capital gains exceed the £3,000 threshold. Additionally, you must complete the capital gains section if your total gross disposal proceeds exceed £50,000 in the tax year, even if your net gains are completely within your tax-free allowance.

What is the OECD Crypto-Asset Reporting Framework (CARF)?

The OECD Crypto-Asset Reporting Framework (CARF) is an international regulatory standard designed to automate the collection and sharing of transaction data between tax authorities. Starting 1 January 2026, cryptocurrency exchanges operating under these rules must collect and report user transaction details.

Under this framework, cryptocurrency providers will automatically share information regarding trading volumes, wallet addresses, and taxpayer identifiers directly with HMRC. This system significantly increases financial transparency and allows HMRC to match exchange transaction records against individual Self Assessment tax returns.