Your tax guide to Bitcoin trading (Image: Getty)
Millions of people who have bought Bitcoin or other cryptocurrencies are being urged to check their tax affairs now, before tougher reporting rules make it easier for HM Revenue & Customs to spot unpaid tax.
The tax rules themselves aren’t changing. They will just be easier to enforce, including on transactions made several years ago.
From 2027, HMRC will receive far more information from UK cryptoasset service providers, giving it a much clearer picture of who has bought, sold or swapped digital currencies.
Many investors wrongly assumed crypto was effectively invisible to the taxman. That’s about to change, and anybody who’s ever traded cryptocurrency should review their records in case HMRC comes calling.
Around 8% of UK adults, roughly 4.5million, now own crypto, according to the Financial Conduct Authority. Selling a coin, swapping one cryptocurrency for another, or being paid in crypto can all trigger a tax charge. That has always been the case.
Under the UK’s Cryptoasset Reporting Framework, providers have been collecting customer information since January 2026.
Between January and May next year they will begin sending HMRC details including names, addresses, dates of birth and National Insurance numbers. HMRC expects the reporting regime to raise an extra £315million over four years.
Harvey Dhillon, chief executive at Zmartly, said the biggest risk isn’t for professional traders but everyday investors. “Crypto was never untaxed. It was just unseen, and that is now changing. Selling a coin, swapping one for another or being paid in crypto can trigger capital gains tax (CGT) or income tax bill, and always could.”
This means you now need to declare any crypto trades, including those in previous tax years, or risk being penalised.
Today, with the CGT annual exempt amount slashed to just £3,000, even modest disposals can be chargeable, Dhillon said. “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.”
Graham Nicoll, financial planner at NCL Wealth Partners, said many investors who made substantial gains during previous crypto rallies wrongly assume those profits didn’t need to be declared. “Those historic gains may come under greater scrutiny.”
As well as any profits, you should report capital losses too. “These can be offset against future gains on crypto or other assets, potentially reducing tax.”
Nicoll urged anybody who has bought or sold crypto to review their transaction history and correct previous tax returns where necessary.
David Stirling, independent financial adviser at Mint Wealth, said many casual investors don’t even realise they’ve created a tax liability. “The rules have not changed but the days of flying under the radar have.”
Even swapping one crypto for another counts as selling it. “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.”
Samuel Mather-Holgate, managing director at Mather and Murray Financial, said crypto’s reputation for anonymity is fading fast. “Those caught hardest will be casual holders who bought, swapped, cashed in or received crypto without realising they may have created a tax liability. Get your records together now, don’t wait until HMRC already has the information.”