HMRC Will Track Crypto Gains in Official UK Tax Statistics for the First Time
HMRC has confirmed that its annual Capital Gains Tax accredited official statistics, scheduled for release on 22 July 2026, will include cryptoasset gains data for the very first time. That's a significant step: it means the UK tax authority will now have a formal, published evidence base for how much crypto tax UK residents are reporting, creating a transparent benchmark it can use to identify the gap between what should be declared and what actually is. If you've been meaning to sort out your crypto tax situation but haven't got round to it, this announcement is a clear signal that the window for quiet non-compliance is closing.
What the CGT Statistics Update Actually Covers
HMRC publishes Capital Gains Tax statistics every year as part of its suite of accredited official statistics. These are not estimates or surveys: they are compiled from actual Self Assessment returns and CGT on UK Property returns submitted to HMRC. The figures are given official accreditation status, meaning they follow the UK Statistics Authority's Code of Practice for Statistics and are treated as a reliable, authoritative record.
Why cryptoassets are being added now
Until this update, the CGT statistics did not break out cryptoasset disposals as a separate line. Gains from selling, swapping, or gifting crypto were folded into broader capital gains categories, making it impossible to quantify the crypto-specific tax take from public data alone. The 2026 publication changes that. For the first time, HMRC will publish identifiable data on cryptoasset gains reported through Self Assessment, giving policymakers, compliance teams, and the public a clear picture of the scale of crypto capital gains being declared in the UK.
Where the data comes from
The statistics draw on two sources: the main Self Assessment tax return (where most individuals report capital gains alongside income) and the standalone CGT on UK Property return. Cryptoasset gains will be drawn from Self Assessment data, since crypto disposals are not property and do not go through the property return route. This is the same data pool HMRC's compliance teams already work from, so the publication simply makes publicly visible what the authority already has internally.
What This Means If You Hold or Have Sold Crypto
The practical implication is straightforward. HMRC now has, or very shortly will have, a published statistical baseline for cryptoasset gains in the UK. That baseline makes it much easier to model the tax gap, meaning the difference between tax that should be paid and tax that is actually collected. A large gap historically attracts increased compliance resources, targeted campaigns, and in some cases criminal investigation. The direction of travel has been clear for years, but this statistical update represents a formal institutionalisation of crypto within the UK tax reporting framework.
Who needs to file a Self Assessment return for crypto
You're required to report capital gains through Self Assessment if your total proceeds from disposing of assets in a tax year exceed four times the annual exempt amount, or if the total gain itself exceeds the annual exempt amount. Disposals include selling crypto for fiat, swapping one token for another, spending crypto on goods or services, and gifting crypto to someone other than a spouse or civil partner. The annual exempt amount for individuals has been significantly reduced in recent years, so gains that would previously have fallen under the reporting threshold may now need to be declared.
The annual exempt amount and current CGT rates
For the 2024/25 tax year, the CGT annual exempt amount is £3,000 per individual. Crypto gains above that figure are taxable. Since the Autumn Budget 2024, the CGT rates that apply to cryptoassets (which are treated as chargeable assets, not as currency) are 18% for basic-rate taxpayers and 24% for higher and additional-rate taxpayers. These rates apply to gains after deducting your allowable costs and the annual exempt amount. Getting those costs right, particularly when you've made multiple purchases over time, is where the calculation gets complicated.
How HMRC Calculates Your Crypto Gain: The Section 104 Pool
UK crypto tax doesn't work on a simple first-in, first-out basis. HMRC uses a pooling method known as the Section 104 pool, sometimes called an average-cost pool. Every time you buy the same token, that purchase is added to a single pool with a running total of units held and total allowable cost. When you sell, you calculate the proportion of the pool's cost that relates to the units disposed of. There are also two override rules: the same-day rule and the bed-and-breakfasting rule (also called the 30-day rule), which prevent you from crystallising a loss and immediately buying back into the same position.
Why this makes a crypto tax calculator essential
If you've made even a modest number of trades, the Section 104 pool calculation becomes extremely tedious to do by hand. Each buy and sell across potentially dozens of tokens needs to be matched correctly, with same-day and 30-day rules checked for every disposal. A reliable crypto tax calculator applies these rules automatically, pulling your transaction history and producing the gain or loss figures you need for your Self Assessment return. Attempting to do this in a spreadsheet without understanding the matching rules is one of the most common reasons UK crypto tax returns contain errors.
The Bigger Picture: HMRC's Crypto Compliance Push
This statistics update doesn't exist in isolation. It sits alongside several other developments that together paint a picture of HMRC treating cryptoassets as a mainstream compliance priority rather than a niche concern.
The cryptoasset question on Self Assessment
HMRC added a specific question to the Self Assessment return asking whether taxpayers held cryptoassets during the year. Answering that question honestly creates a clear audit trail. If you said yes in a prior year but reported no gains, HMRC can and does follow up. If you said no but exchange data suggests otherwise, that's a potential inconsistency that could trigger an enquiry.
Data sharing and exchange reporting
The UK is a signatory to the OECD's Crypto-Asset Reporting Framework (CARF), which creates a standardised international exchange of information between tax authorities about crypto holders' transactions. As CARF implementation progresses, HMRC will receive data from overseas exchanges about UK-resident users, making it harder to rely on the assumption that off-shore activity goes undetected. The statistics update is, in part, a way for HMRC to benchmark reported gains against the data it expects to receive through these channels.
Making Tax Digital and crypto income
Capital gains are separate from income, but many crypto holders have both: staking rewards, liquidity mining returns, and airdrops can all carry an income tax charge rather than a CGT charge. As Making Tax Digital for Income Tax rolls out from April 2026, the way income is reported digitally will change. If you have crypto income above the relevant threshold, understanding HMRC Making Tax Digital and what it means for your crypto tax UK obligations is now a practical necessity, not an optional extra.
Practical Steps to Take Before the Statistics Are Published
The July 2026 publication date gives UK crypto holders a fixed reference point. Here's what you should be doing now.
Reconstruct your transaction history
Start by downloading a complete transaction export from every exchange and wallet you've used. Include on-chain activity, not just centralised exchange trades. If you've used decentralised protocols, particularly DeFi lending or liquidity pools, note that HMRC has its own specific rules for those, and the recent changes to the DeFi treatment are relevant: see our breakdown of the UK DeFi tax and the no-gain, no-loss rule for the latest position.
Identify which tax years need attention
The UK tax year runs from 6 April to 5 April. HMRC can open an enquiry into a Self Assessment return for up to four years after the filing date in cases of innocent error, and up to six years where careless errors are involved. Deliberate non-disclosure has no time limit. If you have unfiled years, the best course of action is to disclose voluntarily through HMRC's Cryptoassets Disclosure Facility or by amending prior returns, rather than waiting for HMRC to contact you first.
Use accurate cost basis records
Your allowable costs include the acquisition price, transaction fees paid in fiat or in crypto, and certain professional fees directly attributable to the disposal. They do not include gas fees paid on unrelated transactions. Getting these costs right can make a material difference to your final tax bill, and it's an area where incomplete records consistently lead to overpayment or underpayment.
Consider whether you need professional advice
If your crypto activity involves DeFi, NFTs, staking, or business-scale trading, the CGT rules alone may not tell the whole story. HMRC's guidance notes that in some circumstances frequent trading can be treated as a trade rather than investment activity, which changes the tax treatment entirely. An FCCA-qualified accountant with specific crypto experience can assess your position and help you file correctly.
Frequently Asked Questions
What does HMRC including crypto in its CGT statistics mean for me personally?
It means HMRC now has a formal public baseline for how much crypto tax UK residents are reporting. This makes it easier for the authority to identify the tax gap and allocate compliance resources toward crypto. It doesn't automatically trigger an enquiry into your return, but it reinforces that crypto is firmly within HMRC's enforcement focus.
Do I have to report crypto gains even if I didn't withdraw to a bank account?
Yes. In the UK, a taxable disposal happens when you sell crypto for fiat, swap one token for another, spend crypto on goods or services, or gift crypto to someone other than a spouse or civil partner. Leaving proceeds on an exchange without withdrawing to a bank account does not change the fact that a disposal has occurred.
What CGT rates apply to crypto gains in the UK?
Since the Autumn Budget 2024, crypto gains are taxed at 18% for basic-rate taxpayers and 24% for higher and additional-rate taxpayers, after deducting the £3,000 annual exempt amount and any allowable costs.
How does the Section 104 pool work for crypto?
Every purchase of the same token is added to a single pool tracking the total number of units and total allowable cost. When you sell, you calculate the average cost per unit across the pool and multiply by the number of units sold to find your allowable cost for that disposal. Same-day and 30-day matching rules override this calculation in specific circumstances.
What happens if I didn't file crypto gains in previous years?
Voluntary disclosure is always better than waiting for HMRC to contact you. You can amend a Self Assessment return within 12 months of the filing deadline, or make a disclosure through HMRC's Cryptoassets Disclosure Facility for older years. Penalties are generally lower for prompted voluntary disclosure than for those discovered through HMRC investigation.
Source: HMRC / GOV.UK