TLDR:
- HMRC sent more than 81,000 crypto tax warning letters in 2025/26, nearly triple 2024’s total.
- Officials trace most unpaid crypto tax to gains realized during the 2022-2025 bull market run.
- New offshore reporting powers next year could help HMRC raise up to 315 million pounds by 2030.
- UK banks face growing MP pressure over account restrictions hurting crypto businesses’ growth prospects.
UK crypto tax enforcement intensified sharply during the 2025/26 financial year, new HM Revenue and Customs figures show.
The tax authority sent more than 81,000 warning letters to crypto holders suspected of unpaid taxes. That total is nearly triple the 27,714 letters issued in 2024.
HMRC attributes most of the outstanding crypto tax liabilities to gains realized during the bull market between 2022 and 2025. The sharp rise points to a broader push against unreported digital asset earnings.
Bull Run Gains Trigger Growing Tax Bills
HMRC data, obtained through a freedom of information request, shows the scale of the crackdown. Warning letters nearly tripled in a single year, jumping from 27,714 to over 81,000. Officials say the surge reflects gains many holders made as crypto prices climbed between 2022 and 2025.
Under current rules, selling, gifting or swapping crypto can trigger a capital gains tax bill. Using digital assets to pay for goods or services carries the same obligation. Many traders remain unaware that these everyday actions count as taxable events.
Neela Chauhan, a partner at accounting firm UHY Hacker Young, told the BBC that younger traders often misjudge HMRC’s reach. Many, she said, “work under the assumption that HMRC has limited visibility over their activities.”
Penalties for unpaid crypto tax can reach 100% of the amount owed, plus interest. That figure rises further for transfers routed through offshore accounts. Chauhan noted that tax authorities suspect widespread underreporting across the trading community.
New Powers and Banking Friction Loom Next
HMRC expects to gain new enforcement powers next year targeting offshore platforms. These rules would force offshore crypto firms to share customer data directly with the tax authority. Officials estimate the measures could raise 315 million pounds in revenue by 2030.
Chauhan told the BBC that tracking wealthy crypto holders will soon be “like shooting fish in a barrel.” Once the new data-sharing powers take effect, tracking unpaid tax should become far simpler for officials. The remark reflects growing confidence among tax professionals about closing the gap.
Separately, tension between UK banks and crypto investors continues to build. A group of MPs from a crypto and digital assets all-party parliamentary group recently contacted major banks. They raised concerns about ongoing account restrictions facing digital asset businesses.
The MPs described “repeated instances” of crypto firms struggling to open basic bank accounts. They warned these restrictions could be one of the biggest barriers to growth for the sector. The banking friction adds another layer of pressure on an already tightening regulatory landscape.
As HMRC ramps up letters and prepares new offshore powers, crypto holders face rising scrutiny. Traders who assumed anonymity from tax authorities may find that assumption increasingly costly.
The combined pressure of enforcement and banking restrictions signals a tougher environment ahead for UK crypto users.
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