Last updated on 7 August 2026
How to Report Crypto on Taxes in the UK? Crypto Tax UK Guide
You report crypto on taxes in the UK by telling HMRC about your gains or income, usually through a Self Assessment tax return.
Under Crypto Tax UK rules, HMRC treats cryptocurrency as an asset, not a currency. This means selling, swapping, or giving away crypto can create a Capital Gains Tax (CGT) liability. Cryptocurrency is typically considered income and subject to income tax regulations whether it is obtained by mining, staking, airdrops, or as payment for labor.
Getting this right is important since HMRC now looks for unreported transactions using blockchain tracking and exchange data. Penalties, interest, and investigations may result from inaccurate reporting.
1. When You Need to Report Crypto to HMRC
You must report your transactions under Crypto Tax UK rules if:
- You sell crypto for pounds (GBP).
- You swap one cryptocurrency for another (e.g., BTC for ETH).
- You pay for goods and services with cryptocurrency.
- You gift crypto to someone other than your spouse or civil partner, such as receiving or giving an international crypto gift.
- You receive crypto as payment, mining rewards, staking rewards, or airdrops.
If you bought 1 BTC for £15,000 in 2021 and sold it in 2024 for £30,000, you made a gain of £15,000. After subtracting the CGT allowance (£3,000) for 2025/26, the remaining £12,000 is taxable.
2. How HMRC Classifies Crypto for Tax Purposes
Under Crypto Tax UK rules, there are two main ways crypto is taxed:
Capital Gains Tax (CGT)
This applies when you dispose of crypto held as an investment, as explained in our Crypto Tax in UK beginner’s guide.
Rates:
- 10% for basic rate taxpayers.
- 20% for higher or additional rate taxpayers.
Income Tax
This applies when you receive crypto as income.
Rates: Same as your income tax band (20%, 40%, or 45%).
You may also owe National Insurance if the income is from work.
3. How to Calculate Your Crypto Gains
To meet Crypto Tax UK requirements, you calculate gains using:
Gain or Loss = Sale Proceeds – (Purchase Cost + Allowable Costs)
Allowable costs include:
- Exchange or transaction fees.
- Costs for professional valuations.
Example:
Bought 2 ETH for £1,000 each.
Sold them for £2,000 each.
Paid £50 in selling fees.
Sale proceeds: £4,000
Purchase cost: £2,000
Fees: £50
Gain: £4,000 – (£2,000 + £50) = £1,950 taxable gain.
4. How to Report Crypto to HMRC
Step 1 – Keep Accurate Records
HMRC requires:
- Transaction dates.
- Amount in crypto and GBP.
- Transaction type (buy, sell, swap).
- Wallet addresses and exchange accounts.
Step 2 – File Through Self Assessment
Register with HMRC no later than October 5th after the end of the tax year if you do not typically file a Self Assessment.
The tax year in the UK runs from April 6 to April 5. The deadline to file online is 31 January after the tax year.
Report:
- Capital gains on the SA108 form.
- Crypto income on the SA103 or SA101 form.
Step 3 – Pay Your Tax
Income tax and CGT must be paid by January 31st. Additionally, you might be required to pay for the upcoming year.
5. Common Mistakes Under Crypto Tax UK Rules
Assuming crypto-to-crypto swaps are tax-free
Swapping of one cryptocurrency for another is considered a disposition and may be subject to taxes.
Not recording small transactions
Even small crypto purchases or trades add up over the year.
Reporting in USD instead of GBP
HMRC requires GBP values at the date of the transaction.
Ignoring airdrops and staking rewards
These can be taxable as income when received, taxable as income when received, even before selling, something HMRC is becoming stricter about under its new crypto reporting rules.
6. HMRC Is Increasing Crypto Tax Enforcement
HMRC uses data from UK and overseas exchanges to find unreported activity. In 2024, they sent thousands of letters to crypto holders warning them to check their returns.
Not following Crypto Tax UK rules can result in:
- Penalties up to 100% of the unpaid tax.
- Interest charges.
- Possible criminal investigation for serious cases.
7. Example: Full Reporting Scenario
Sarah’s Case:
- Bought 3 ETH in 2022 for £800 each (£2,400 total).
- Sold them in 2024 for £1,800 each (£5,400 total).
- Paid £60 in selling fees.
- Received 0.1 BTC from staking worth £2,000 at the time.
Capital Gains:
£5,400 – (£2,400 + £60) = £2,940.
Under the £3,000 CGT allowance, so no CGT owed.
Income Tax:
Staking income of £2,000 taxed at her income tax rate.
Sarah reports both on her Self Assessment.
8. How to Make Reporting Easier
- Keep organised records from the start.
- Use crypto tax software that supports Crypto Tax UK reporting.
- Always convert values to GBP on the date of the transaction.
- Work with a crypto accountant who understands HMRC rules.
Final Thoughts
Following Crypto Tax UK rules comes down to knowing if your crypto is taxable as a capital gain or income, keeping accurate records, and filing on time. The rules can feel complex, but a clear process makes it manageable.
If you want to be certain your HMRC report is correct and penalty-free, get expert help.
At Crypto Accountants, we specialise in crypto tax advisory for investors, traders, businesses, and Web3 professionals. We handle everything from calculating your gains to preparing HMRC-compliant reports, so you can focus on your crypto strategy without worrying about tax errors or penalties.
Whether you have years of complex transactions or just started in crypto, our team ensures your reporting is accurate, optimised, and penalty-free.
Get expert help today: Book your Crypto Tax Advisory session and make sure your next HMRC return is done right.
FAQs
Do I have to pay tax if I only hold crypto and don’t sell it?
No. Simply holding crypto is not taxable under UK rules. You only owe tax when you dispose of it by selling, swapping, or spending it.
What happens if I lose money on crypto?
You can record a loss as a capital loss to HMRC if you incur one. You must include these losses in your self-assessment, but they can be used to offset future capital gains.
Are crypto gifts taxable?
Yes, most crypto gifts are treated as disposals and may create a Capital Gains Tax liability. The only exception is when you gift to your spouse or civil partner.
How far back can HMRC review my crypto transactions?
In serious cases of tax evasion, HMRC can go back up to 20 years. For standard cases, the review period is usually between 4 and 6 years.
