HM Revenue and Customs (HMRC) data reveals that hundreds of British cryptocurrency investors became millionaires during the latest tax year, as a strong rally in digital assets generated significant capital gains. In the year ending April 2025, taxable capital gains from crypto assets across the UK totaled £1.38 billion.

These gains were reported by approximately 17,600 individuals, with 240 investors realizing capital gains exceeding £1 million. Together, this group accounted for £717 million of the total crypto-related gains. The HMRC analysis indicated that 87 percent of crypto investors reporting gains were male, and 54 percent fell within the 25 to 44 age bracket. For comparison, only 17 percent of taxpayers who declared gains from other asset classes were within the same age range.

Bitcoin, which makes up about half of the cryptocurrency market, contributed significantly to this growth. After the collapse of the crypto exchange FTX in November 2022, Bitcoin experienced a sustained price increase, reaching a peak of $126,198 in October 2025—a rise of more than 600 percent. Market analysts attribute this surge in part to a more favorable regulatory environment following former U.S. President Donald Trump’s re-election.

Despite these figures, some tax experts suggest that the true scale of crypto gains may be underreported. Phil Kinzett-Evans of accounting firm UHY Hacker Young noted that a considerable portion of gains might not yet have been declared to HMRC. The tax authority has reportedly sent 81,000 warning letters to individuals it suspects may have underpaid crypto-related taxes for the year ending April 2025, signaling an increased focus on compliance in the digital asset sector.