Coinbase crypto tax: how to calculate your UK CGT

Three steps

1. 1

   Export from Coinbase

   Coinbase’s transaction history report (CSV). Pooled reads the current report format directly, including the preamble rows above the header.

2. 2

   Import into Pooled

   Drop the file into Pooled. It detects Coinbase automatically and parses every trade in your browser; nothing is stored until you review and confirm.

3. 3

   Review and read off your figures

   Any row with no GBP value (a swap, a reward) is flagged for you to fill, never guessed. Foreign-currency rows are valued from HMRC monthly rates. Then read off SA108-shaped figures with the annual exempt amount applied.

Coinbase note. Coinbase “Convert” rows are treated as a disposal of one token and an acquisition of the other, valued in GBP.

How HMRC taxes your Coinbase activity

Selling for pounds, swapping one token for another, or spending crypto are all disposals. Each is matched under HMRC’s rules in order: same-day, then the 30-day bed and breakfast rule, then the per-token Section 104 pool. Staking and reward income is taxed at its GBP value on receipt. The full detail, with HMRC sources, is in the UK crypto tax guide.