HMRC is now receiving your crypto exchange data.
Under the Crypto-Asset Reporting Framework, UK exchanges now report your account and transaction data to HMRC. Work out what you owe — with a calculator that applies HMRC’s own share-pooling rules and shows its working.
- 3 rules
- Same-day · 30-day · Section 104
- Shows working
- Every match, every cost basis
- 2024/25–2026/27
- Incl. the 30 Oct 2024 rate change
Drag to spin · BTC · ETH · XRP · SOL · and more
Works with the tokens from every major UK exchange.
How it works
Your transactions
Buys, sells and crypto-to-crypto trades — with fees. Manual entry now, CSV import soon. Nothing ever leaves your browser.
HMRC's own rules
Same-day, then the 30-day bed-&-breakfast rule, then the Section 104 pool — applied in the right order, across every tax year.
Exactly what you owe
Every disposal, every cost basis, every band — the full working, not just a final number. Ready for Self Assessment.
Open the calculatorCrypto CGT calculator
Enter your buys, sells and trades. We’ll apply HMRC’s matching rules, estimate your Capital Gains Tax, and show exactly how every figure was reached. Manual entry for now — nothing leaves your browser.
Add a transaction
Your details
Your unused income headroom below the higher-rate threshold. Splits gains across the 18% / 24% rates. Leave blank to assume higher-rate (24%) on all gains.
Transactions
No transactions yet.
Add your buys, sells and trades on the left — or load the worked example to see how it works.