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Sold crypto before or after 30 October 2024?

From 30 October 2024, HMRC increased the CGT rates on crypto. If you made disposals both before and after that date, your gains are subject to two different rates. Applying them correctly is crucial to avoid penalties.

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Two different tax rates, one big headache

Before 30 October 2024, crypto gains were taxed at 10% for basic-rate taxpayers and 20% for higher-rate taxpayers. From that date onwards, HMRC raised these rates to 18% and 24%.

If you sold crypto both before and after this change, you must split your gains and apply the correct rates to each period.

Unfortunately, HMRC’s Self Assessment system still defaults to the old rates, meaning your post-October disposals may be taxed incorrectly unless you manually adjust them.

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Manual adjustments are risky

To correct your return, HMRC asks you to use Box 51 on the SA100 (via the SA108 Capital Gains pages) to record the “Adjustment to Tax Due on Gains.”

But manually calculating this adjustment can be time-consuming and confusing, especially if you trade frequently or use multiple wallets and exchanges.

A single error could cause underpayment, delays, or even compliance issues with HMRC.

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CryptoBooks automatically applies the correct rates

With CryptoBooks, there’s no need to worry about manual adjustments or complex forms.

The platform automatically separates your crypto gains by date, applies the correct tax rate before and after 30 October 2024, and prepares the Box 51 adjustment for you.

You’ll receive a fully completed SA108 form, ready to use. It’s fast, accurate, and designed to keep you compliant. All while saving you hours of work.

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Automatically separates pre/post gains

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Applies correct HMRC tax rates

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Prepares Box 51 adjustment

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Generates HMRC-ready SA108 report

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