UK Tax Authority Doubles Down on Crypto Investors With 65,000 Warning Letters

The UK tax authority, HM Revenue & Customs (HMRC), has intensified its efforts to ensure cryptocurrency investors pay their fair share of taxes. According to the Financial Times, HMRC sent nearly 65,000 warning letters to suspected tax evaders during the 2024–25 tax year, more than double the 27,700 letters issued the previous year.

The letters, known as “nudge letters,” encourage taxpayers to voluntarily review and correct their filings before formal investigations begin. Over the past four years, HMRC has sent more than 100,000 such notices, reflecting the agency’s heightened focus on crypto-related compliance amid surging adoption and asset prices.

HMRC Tightens Oversight as Crypto Ownership Grows

The Financial Conduct Authority (FCA) estimates that around seven million adults in the UK now hold cryptocurrencies. This figure is significantly up from 5 million in 2022 and 2.2 million in 2021, signaling steady growth in mainstream participation.

Tax experts say that many investors may be unaware of how tax laws apply to digital assets. “The tax rules surrounding crypto are quite complex,” explained Neela Chauhan, a partner at UHY Hacker Young, which obtained the data through a Freedom of Information request. “Even moving from one coin to another can trigger capital gains tax,” she said.

HMRC’s ability to monitor crypto activity has improved significantly in recent years. The agency now receives transaction data directly from major exchanges, giving it greater visibility into trading behavior. 

Starting in 2026, HMRC will also gain automatic access to global exchange data through the OECD’s Crypto-Assets Reporting Framework (CARF), further tightening oversight of cross-border transactions.

Global Momentum for Crypto Tax Reform

The UK government’s crackdown comes as other countries revisit their crypto tax policies. In the United States, lawmakers are weighing exemptions for small transactions and exploring how to classify staking rewards. 

During a recent Senate Finance Committee hearing, Coinbase executive Lawrence Zlatkin urged Congress to introduce a de minimis exemption f[0=or crypto payments under $300 to simplify compliance.

Meanwhile, South Korea’s National Tax Service (NTS) has warned that it will seize digital assets, even those in cold wallets, if linked to unpaid taxes.

With global regulators sharpening their focus, crypto investors face mounting pressure to stay compliant as governments close the net on digital asset tax evasion.