Mandatory Reporting for Crypto Exchanges

• Start Date: January 1, 2026
• Requirement: All U.K.-operating crypto exchanges must collect complete transaction histories for U.K. users, including:
  • Purchase price of crypto assets
  • Sale amounts
  • Profit and loss details
• Reporting to HMRC: Exchanges classified as “Reporting Cryptoasset Service Providers” will send the collected data to HM Revenue & Customs (HMRC) in 2027.

Purpose & Enforcement

• HMRC will compare reported data to individual self-assessment tax filings.
• Platforms failing to comply will face sanctions, and individuals who underreport gains may also be penalized.
• The measures align the U.K. with the OECD Crypto-Asset Reporting Framework, which aims to standardize crypto tax reporting globally.

Timeline for Traders

• Users have until end of 2026 to ensure their filings accurately reflect their transaction history before automatic reporting begins.

Broader Regulatory Context

• The U.K. government confirmed this initiative in its 2025 Budget as part of a broader clampdown on tax avoidance.
• Other economic measures include adjustments to the economic crime levy starting April 1, 2026, and over £1.5 billion allocated to youth employment and skills programs.
• Visa reforms will help U.K. businesses access global talent to adapt to new regulatory and technological requirements.

This move effectively makes the U.K. one of the first major jurisdictions to collect complete domestic crypto transaction data, closing a gap that previously allowed certain trades to remain off the radar for tax purposes.