HMRC 'check record now' warning as new tax rules enforced from 2027

There are new tax rules being enforced from 2027 – with people being by experts to "check your history now" and that "even small profits can mean you owe something". Owning crypto was never tax-free. Selling a coin, swapping one for another, or being paid in crypto can all trigger Capital Gains Tax or Income Tax. What will soon change, however, is not the tax but the visibility. Under the UK's Cryptoasset Reporting Framework, UK cryptoasset service providers began collecting user data in January 2026, with their first reports to HMRC due between January and May 2027, covering the 2026 calendar year. Providers must record each user's name, address, date of birth, tax residence and, for UK residents, their National Insurance number or Unique Taxpayer Reference, with penalties of up to £300 per user for late or inaccurate reporting. This is a reporting regime on liabilities that already existed, not a new tax. But HMRC expects the measure to raise an extra £315 million over four years. Gains are measured against a Capital Gains Tax annual exempt amount that has been frozen at £3,000, so even modest disposals can be chargeable. The Financial Conduct Authority estimates around 8% of UK adults, roughly 4.5 million people, now hold crypto. Many assumed it was invisible, or that a hobby-sized holding could never be taxable. Harvey Dhillon, CEO at Zmartly , said the person caught out is not the sophisticated trader but the everyday holder or side-hustler who bought a little, sold or swapped some, and never thought to put it on a tax return. He added: "Crypto was never untaxed. It was just unseen, and that is the only thing changing. Selling a coin, swapping one for another or being paid in crypto can trigger Capital Gains Tax or Income Tax, and always could. "Reported to HMRC is not the same as declared by you, and the gap between the two is where the penalties live. The person caught is not the full-time trader but the everyday holder who bought a little, sold some, and assumed a small pot could never be taxable. "With the Capital Gains allowance frozen at £3,000, even modest disposals can be chargeable. So if you have ever sold or swapped crypto, check your history now, work out the gains for each year, and correct anything missing before the reports land. The anonymity was the only thing protecting an unpaid bill. In 2027 it goes." Graham Nicoll, Financial Planner, Chartered FCSI at NCL Wealth Partners , urged people to review their transaction history. He added: "This isn't a new tax, but it is a significant shift in transparency. I’ve seen investors who made substantial gains during previous crypto rallies wrongly assume those profits didn't need to be declared. As HMRC receives more data directly from crypto providers, those historic gains are likely to come under greater scrutiny. "At the same time, investors shouldn't overlook losses. Properly reporting capital losses now can allow them to be offset against future gains, potentially reducing tax when markets recover or from gains on other assets. Anyone who has bought or sold crypto should review their transaction history, calculate any gains or losses and, if necessary, correct previous tax returns before HMRC comes knocking. Good records are now just as valuable as good investment returns." David Stirling, Independent Financial Adviser at Belfast-based Mint Wealth, said many could not even know they need to pay tax. He added: "Crypto was never tax-free, it just felt that way because nobody was really monitoring it, but that time is over. From January 2026, every exchange operating in the UK had started collecting your name, address and National Insurance number and those details land at HMRC next year. "The rules have not changed but the days of flying under the radar have. The person who gets caught is not the professional trader, it is the ordinary person who put a few hundred quid into Bitcoin during lockdown, swapped some for another coin when a mate said it was worth it, and never once thought about tax. "Here is the part most people miss: swapping one crypto for another counts as selling it, and with the tax-free allowance sitting at just £3,000, even small profits can mean you owe something. If that sounds like you, dig out your transaction history and talk to someone before the brown envelopes start arriving. HMRC does not need to prove you did it on purpose, it just needs a number that does not add up." Eamonn Prendergast, Chartered Financial Adviser at Bromley-based Palantir Financial Planning Ltd , said HMRC will be able to see who owes them cash from 2027. He added: "The rules have been in place for years, but the new reporting regime means HMRC will now have the data to match what’s been declared. The real risk isn’t for sophisticated traders, it’s for everyday investors who bought and sold small amounts and never realised it could trigger tax. "With the capital gains allowance now just £3,000, it doesn’t take much to create a liability. The confusion between ‘reported’ and ‘declared’ is where many will get caught out. Anyone who has bought, sold or swapped crypto should start reviewing their history now, before reporting begins in 2027 – because once HMRC has the data, there’s little room for error." Samuel Mather-Holgate, Managing Director & IFA at Swindon-based Mather and Murray Financial , said as crypto is becoming more mainstream, it is becoming more transparent. He added: "The uncomfortable truth is that one of crypto’s main attractions was anonymity, or at least the belief that activity sat outside the normal financial system. That is now disappearing. Crypto was never tax-free, but many treated it as if HMRC would never see it. "Once platforms collect names, tax references and transaction data, crypto looks far less like a private alternative and much more like another regulated asset. That makes crypto redundant for many people. Unless it is being used deliberately as a small portfolio diversifier, the old argument for holding it is much weaker. "Those caught hardest will be casual holders who bought, swapped, cashed in or received crypto without realising they may have created a tax liability. Advice should be to get records together now, not wait until HMRC already has the information."