Investors should now get ready for the new cryptocurrency tax regulations

Crypto platforms will be required to report user data to HMRC starting in 2027, which means that investors who fail to declare and pay their outstanding capital gains tax may be penalized

In light of new transparency regulations that will be implemented next year, cryptocurrency investors are being advised to make sure they have reported any capital gains to HMRC or risk fines totaling hundreds of pounds.

According to data from the Financial Conduct Authority (FCA), about 4.5 million adults in the UK, or 8% of the population, currently own cryptocurrencies like Bitcoin.

However, analysts caution that people who have entered the market as a side gig or to generate rapid profits during periods of high Bitcoin prices might not be aware that they must pay capital gains tax (CGT).

In the past, HMRC has taken tough measures against people who have not paid their CGT.

Watch the entire video here: According to Freedom of Information (FOI) data that comparison platform BrokerChooser obtained from HMRC between 2020 and 2025, up to 101,024 CGT warning or nudge letters were sent to investors in cryptocurrency assets.

When platforms begin reporting user data to HMRC in 2027, cryptocurrency investors won't have any justifications.

This is what you should know.

Changes in cryptocurrency taxes explained.

Crypto ownership has never been tax-free, and any profits from the asset's sales could result in a CGT bill if they exceed the £3,000 threshold.

Investors are currently required to report this to HMRC directly, but in accordance with the UK's upcoming Cryptoasset Reporting Framework, UK cryptoasset service providers started gathering user data in January 2026, and their initial reports to HMRC are due between January and May 2027.

Each user's name, address, date of birth, tax residence, and, in the case of UK residents, their National Insurance number or Unique Taxpayer Reference must be documented by providers.

You risk a fine of up to 300 if you provide false information or fail to provide specifics.

Over a four-year period, HMRC anticipates that the measure will raise an additional 315 million.

If HMRC discovers that you have unpaid taxes, you could be penalized up to 100% of the amount owed plus interest.

The person caught out, according to Harvey Dhillon, chief executive of the accounting firm Zmartly, is not the sophisticated trader but rather the regular holder or side gigger who made a small purchase, sold it, or exchanged it without thinking to record it on a tax return.

He went on, "Crypto was never tax-free. It was simply invisible, and that is the only thing that changed. Selling a coin, exchanging one for another, or receiving payment in cryptocurrency can always result in either income tax or capital gains tax.

"The penalties exist in the difference between what you declared and what was reported to HMRC. The person who was caught was not a full-time trader, but rather a regular holder who made a few purchases, sold a few, and believed that a small amount could never be taxed."

How to get ready for a cryptocurrency tax.

The price of cryptocurrencies has skyrocketed in recent years, particularly if you have purchased and sold Bitcoin or Ethereum.

Even small disposals may be subject to charges since the capital gains allowance is set at £3,000.

"Check your history now, calculate the gains for each year, and fix anything missing before the reports land if you have ever sold or swapped cryptocurrency," Dhillon continued. The only thing keeping an unpaid bill safe was its anonymity. 2027 is the year."

Financial advisor Graham Nicoll of NCL Wealth Partners advised individuals to examine their past transactions.

"This isn't a new tax, but it's a big change in transparency," he continued. I've witnessed investors who made significant profits during prior cryptocurrency rallies mistakenly believe those gains weren't required to be reported. These historic gains will probably be scrutinized more closely as HMRC receives more data directly from crypto providers.

Investors should also be aware of losses. If capital losses are properly reported now, they can be deducted from future gains, which could lower taxes when the market recovers or from gains on other assets.

Before HMRC calls, anyone who has purchased or sold cryptocurrency should examine their transaction history, figure out any gains or losses, and, if needed, amend prior tax returns. These days, good records are worth as much as profitable investments."