Unpaid tax from cryptocurrency transactions targeted
HMRC is writing to individuals who may need to pay tax on the disposal of cryptoassets such as Bitcoin. Why might tax be due and what should you do if you receive a letter?
HMRC is currently writing to individuals who have disposed of cryptoassets because the tax treatment is widely misunderstood and therefore tax may have been underpaid.
Most will understand that tax may be due if there is a capital gain once cryptoassets have been sold for cash. However, each time a cryptoasset is disposed of a capital gain may be triggered. This would include the following events:
- using cryptocurrency to purchase goods or services
- exchanging one type of cryptoasset for another; or
- gifting cryptoassets.
In certain circumstances, income tax and NI may be payable. If you receive such a letter from HMRC, you must take action within 60 days even if no tax is due. If you submitted a tax return, the return should be amended where possible. If you did not submit a tax return, or the deadline has passed, you should use the dedicated disclosure service to inform HMRC.
Further guidance on taxable cryptoasset transactions can be found here.
Related Topics
-
Payment deadline for corporation tax
-
HMRC targets undeclared consultancy income in the medical sector
HMRC is writing to people working in the medical sector where information supplied by private healthcare providers suggests that consultancy fees may have been omitted from their tax returns. Recipients have 30 days to check their position and respond. What should you do if you get a letter?
-
MONTHLY FOCUS: BUSINESS AND AGRICULTURAL PROPERTY RELIEF: WHAT DO THE NEW IHT RULES MEAN FOR YOU?
The inheritance tax treatment of businesses and farms changed fundamentally from 6 April 2026. The amount that can qualify for 100% business property relief and agricultural property relief is now capped, potentially leaving families with a significant tax bill for the first time. What has changed, and what should business owners and farmers be doing about it?




This website uses both its own and third-party cookies to analyze our services and navigation on our website in order to improve its contents (analytical purposes: measure visits and sources of web traffic). The legal basis is the consent of the user, except in the case of basic cookies, which are essential to navigate this website.