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Know exactly how much you've gained from crypto

Finbooks reconstructs your complete crypto history, applies HMRC rules and automatically calculates your realised gains and losses across every exchange and wallet.

7-day free trial. No card required.

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Why your exchange’s capital gains figures aren’t enough

Capital Gains Tax isn’t calculated exchange by exchange. HMRC expects you to work out gains and losses across your entire crypto portfolio.

That means combining transactions from every exchange, wallet and blockchain before applying the relevant tax rules.

Moreover, every transaction affects your acquisition cost: wallet transfers, token swaps, staking rewards and previous disposals all influence your final gain or loss. That’s why spreadsheets and simple calculators so often produce incorrect results.

Total capital gain with a question mark, surrounded by a chaotic cloud of scattered crypto transaction amounts.

Your profit isn't necessarily your capital gain

Imagine you bought crypto for £7,000 and later disposed of it for £10,000.

£10,000 is simply your disposal proceeds. It’s not the same as your £3,000 straightforward gain, and neither of those numbers necessarily tells you how much Capital Gains Tax you’ll actually owe.

Your acquisition costs, previous transactions, gains and losses, available annual exempt amount and wider tax position can all affect the final result.

Sale value. Capital gain. Tax due. Three different numbers.

Capital gain tax label with a question mark over a portfolio dashboard showing value, performance and an uncertain tax due amount.

From thousands of transactions to one clear capital gains figure

Finbooks rebuilds your complete crypto history and categorises every single transaction under HMRC rules – from wallet transfers and disposals to token swaps and staking rewards.

This ensures accurate capital gains and loss calculations, ready to be reported in your Self Assessment.

UK capital gains calculator chart with a green background, broker icons and a total capital gains value of £638.45.

Import data from anywhere

Sync transactions via API or CSV from banks, brokers, trading accounts, exchanges and wallets to get a complete view of your portfolio and all tax reports.

Import data from anywhere

From your investment history to accurate calculations

  1. 1

    Connect your accounts

    Import your exchanges, wallets and public addresses through supported integrations, APIs or CSV files.

  2. 2

    Reconstruct your history

    Finbooks matches transactions, identifies wallet transfers and rebuilds acquisition costs across your complete crypto history.

  3. 3

    Let Finbooks calculate your gains

    HMRC rules are applied automatically to calculate your realised capital gains and losses.

  4. 4

    Generate your tax-ready reports

    When it's time to file, generate HMRC-ready reports together with the supporting calculations behind every figure.

Do you actually know your crypto capital gain?

Bring your complete crypto history together and let Finbooks calculate your gains, losses and tax position under UK rules.

Got questions? We have answers