How this CGT scenario works
Capital Gains Tax is normally based on the gain, not the full sale proceeds. The gain is reduced by allowable costs, qualifying losses, and any available annual exempt amount.
Records matter
Keep purchase dates, sale dates, dealing fees, improvement costs where relevant, and loss records. Crypto and share pooling can need especially careful records.
Use as an estimate
This page is for general information only and is not tax advice. CGT rules and allowances can change, so check current HMRC guidance before filing or paying tax.