Paying tax on your crypto gains

A couple of years ago, an estimated five million people in the UK held cryptoassets (often shortened to crypto), which is about 10% of the adult population. Although the buzz around crypto isn’t what it was, large numbers of people around the world continue to invest. But according to Mike at GoSimpleTax many UK investors either deliberately ignore or innocently fail to realise is UK tax is often payable after disposal of cryptoassets.

Don’t let that be you!

What are cryptocurrencies?

Cryptocurrencies are the most popular and widely known type of cryptoasset. They don’t exist in physical form, rather they are digital currencies exchanged through online networks that don’t have any backing, control or maintenance from a centralised authority such as a government or bank.

Individual ownership records are stored in a digital ledger, which is a computerised database that uses cryptography to secure transaction records, control additional coin creation and verify ownership transfer.

Cryptoassets can be bought and sold on cryptoasset exchanges. Typically, cryptocurrency value fluctuates more than government-issued currencies. Well-known examples of cryptocurrency include Bitcoin (the first decentralised cryptocurrency, which was launched in 2009), Ethereum, Tether and Litecoin, but there are many others. 

HMRC getting tougher on crypto tax avoidance

Some investors deliberately fail to report their taxable gains from disposal of cryptoassets, because they believe they’re invisible and HMRC won’t find out about them. It’s a mistake and imminent changes are likely to mean HMRC is more likely to find out about unreported crypto gains.

The UK government is consulting on how to implement the OECD Cryptoasset Reporting Framework (CARF) and amendments to the Common Reporting Standard (CRS2). The CARF is a brand new standard that addresses cryptoasset tax non-compliance, while CRS2 is an update to the existing framework on offshore accounts. Both seek to make it much harder to conceal taxable crypto gains.

In late 2023, HMRC launched a nudge email campaign aimed at those it believed to have unreported cryptoasset gains. HMRC still has unreported cryptoasset gains firmly in its sights, so investors are being advised to report their gains and pay all tax due.

How much tax is payable on crypto gains?

Capital Gains Tax (CGT) can be payable if you sell your crypto, exchange it, use it to pay for goods or services, give it away (unless it’s to your spouse/partner) or donate it to charity. Your gain is the difference between the buying and selling price. If you were given crypto that you later disposed of, to calculate your gain, you must find out the market value when you took possession.

• After your total taxable gains go over the CGT tax-free allowance threshold – which is now just £3,000 for the 2024/25 tax year – if you’re a higher or additional rate Income Tax payer (ie your taxable income is £50,271 or more a year) you’ll pay 20% CGT on your crypto gains above the threshold.
• If you’re a basic rate Income Tax payer (ie your taxable income is £12,571-£50,270 for the year), you’ll pay CGT of 10%, then 20% on gains above the £50,270 income threshold.
• The CGT tax-free allowance was £6,000 in 2023/2024, which has now been halved, meaning more people will potentially need to pay CGT on crypto and other taxable gains.

Need to know! Some allowable expenses are CGT deductible including: advance transaction fees; advertising for a buyer or seller; drawing up a transaction contract; valuation costs paid to others to work out a transaction gain. You can also use capital losses to reduce your gain, as long as you first report to HMRC.

To report taxable crypto gains, most people complete a Self Assessment tax return after the end of the tax year in which the gain was made. If you’re not already registered, obviously, you’ll need to register for Self Assessment.

Alternatively, you can use the real-time Capital Gains Tax service. Many crypto assets are traded on exchanges that use overseas currencies. If this applies, the value of any gain or loss must be converted into pounds sterling when completing your Self-Assessment tax return.

You must maintain separate detailed records for each of your cryptocurrency transactions stating: token type; disposal type; disposal date; total tokens disposed; tokens remaining; token value in pounds sterling; and wallet addresses. HMRC can ask to view your records when carrying out a compliance check.

Need to know! If HMRC believes you’re trading in crypto rather than occasionally investing, you may have to pay Income Tax and National Insurance, because you’re running a business.

What if you should have reported crypto gains but didn’t?

If you do not report taxable crypto gains to HMRC, you may need to pay not only the tax, but also interest due and a significant “failure to notify” penalty. Those found guilty of deliberate tax evasion can face criminal prosecution and a custodial sentence in the worst cases.

If you believe that you do owe tax on previous crypto gains, it’s best to voluntarily come forward before HMRC opens an enquiry. If you voluntarily make a disclosure, the penalties can be much lower or non-existent where innocently made.

If HMRC opens an enquiry after you failed to do anything on receiving a nudge email, it’s likely to lead to higher penalties. HMRC has set up a disclosure service for cryptoassets, intended to make the process quicker and easier for taxpayers. 

More information on cryptoassets and tax  

HMRC has published a cryptoassets manual for individual investors, which explains the above points in deeper detail.

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