Crypto Users in the UK Must Now Share Account Details with Tax Authorities
New regulations aim to ensure tax compliance amid booming cryptocurrency market
As of 1 January 2026, individuals who buy and sell cryptocurrency in the United Kingdom are required to share their account details with the tax authorities or face penalties. This significant change, announced by Her Majesty’s Revenue and Customs (HMRC), is designed to ensure that all relevant taxes, including capital gains tax, are properly paid by crypto investors.
Automatic Information Sharing From Exchanges
HMRC will begin automatically collecting detailed information about all users of cryptocurrency exchanges—the platforms that function similarly to banks in the digital currency space. By obtaining accurate data on cryptocurrency transactions such as buying, selling, and exchanging virtual coins, HMRC aims to clamp down on widespread non-compliance and recover tens of millions of pounds in unpaid taxes.
The new rules oblige cryptocurrency exchanges operating in the UK to provide up-to-date and accurate accounts of their users’ earnings. Failure to comply could result in significant fines for these exchanges, emphasizing the government’s commitment to effective oversight of the crypto sector.
Context of the Regulatory Tightening
This move by HMRC coincides with broader efforts by the Financial Conduct Authority (FCA) to implement tougher regulations for the cryptocurrency industry. The FCA is conducting a public consultation, open until 12 February 2026, on proposed rules that include enhanced standards for crypto exchanges, responsible conduct requirements for brokers, and regulations surrounding crypto lending and borrowing. These steps seek to protect consumers, promote innovation, and build trust in the digital finance ecosystem.
David Geale, FCA’s executive director for payments and digital finance, recently commented on the consultation: "Our goal is to have a regime that protects consumers, supports innovation and promotes trust. We welcome feedback to help us finalise these rules."
Market Volatility Highlights Tax Concerns
The tightening of tax compliance comes after a volatile year for cryptocurrencies. For example, Bitcoin, often seen as a market barometer, surged from approximately $93,500 (£69,500) at the start of 2025 to a peak nearing $124,500, before dropping below $90,000 by year’s end. Investors who bought low and sold high owe taxes on their gains, but tax authorities have historically found it challenging to trace and collect these payments.
Dawn Register, a tax dispute resolution partner at the accountancy firm BDO, explains, "HMRC has been concerned for some time about high levels of non-compliance among crypto investors." She notes the new regulations will make it much harder for crypto holders to hide untaxed profits, as the tax authority will now have more comprehensive insight into users’ transactions.
Potential Tax Revenues and Compliance Expectations
HMRC estimates there are many thousands of crypto owners in the UK with outstanding tax liabilities. The new Cryptoasset Reporting Framework (CARF) regulations, already being implemented in multiple countries worldwide, will facilitate international cooperation in sharing tax-related information across borders. HMRC anticipates that these changes could help collect at least £300 million in unpaid taxes over the next five years.
Investors who realized gains from cryptocurrency in the 2024-25 financial year may need to file a tax return by 31 January 2026 through a new dedicated section in the self-assessment form. Additionally, HMRC encourages voluntary disclosure, offering taxpayers a disclosure facility to declare any undeclared gains or unpaid tax from prior years before April 2024, helping them to regularize their tax affairs proactively.
Looking Ahead
As the cryptocurrency market continues to grow and evolve, heightened regulatory scrutiny emphasizes the importance of transparency and compliance for market participants. With automatic information sharing now in force and ongoing consultations for broader rules, UK authorities are taking significant steps toward integrating the crypto economy into the existing financial and tax framework.
For crypto investors, understanding and adhering to these new requirements is crucial to avoid penalties and contribute toward a fairer, more transparent market.
Reported by Rachel Clun, Business Reporter for BBC News, with additional information from Joe Tidy.