HMRC Escalates Crypto Crackdown With 81,000 Tax Warning Notices

The surge in activity represents a nearly threefold increase compared to the 27,714 warnings issued in 2023/24. Data obtained by UHY Hacker Young indicates that the agency suspects significant undeclared liabilities, potentially linked to the price appreciation of digital assets between late 2022 and 2025. While these "nudge" letters do not confirm an active investigation, they serve as a prompt for taxpayers to audit their records for omissions regarding capital gains or income tax.

Under current regulations, taxable events include selling crypto for fiat, exchanging tokens, or using them for purchases. The enforcement landscape is shifting further with the Cryptoasset Reporting Framework, which took effect in January 2026. This mandate requires service providers to collect comprehensive customer data, with the first reports for 2026 activity due by May 31, 2027. Officials estimate this transparency initiative could generate £315 million in revenue by 2030, as the agency gains clearer visibility into both domestic and international platform holdings. Taxpayers failing to rectify errors face potential penalties of up to 100% of the tax due, alongside accrued interest, though voluntary disclosure through the Cryptoasset Disclosure Service remains an available pathway for compliance.