The UK crypto tax calculator.

Work out your Capital Gains Tax and crypto income for 2019/20 to 2026/27, matched the way HMRC's rules require — same-day, 30-day and section 104 pool — with every step shown.

• UK rules, transparently applied Every disposal shows which rule matched it and the pool before and after. No black box.
• Private by design Your exchange files are read in your browser and never leave your device.
• No account, no subscription See your estimate for free. Pay once if you want the full report.

Launching ahead of the 31 January 2027 Self Assessment deadline. If you have received a crypto letter from HMRC, we will help you work out which years to look at and how to put them right.