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HMRC requires each token to be held in a single pool, called a Section 104 holding, at its aggregate allowable cost. When you sell, the disposal takes a proportionate share of that pooled cost as its basis.

Coinfig builds a pool per asset across your wallets and exchanges, and shows the full working behind every disposal so you can trace how the pooled cost was calculated.

Before drawing on the pool, HMRC matches a disposal first against any acquisitions made on the same day, then against acquisitions made in the following 30 days. This is often called the bed and breakfasting rule.

Coinfig applies this matching order automatically, so same-day and 30-day acquisitions are paired with your disposals before the Section 104 pool is used.

For Capital Gains Tax the UK does not split gains by how long you held an asset. A disposal after ten years and a disposal after ten days are calculated the same way.

Your actual tax depends on your total gains for the year, your annual exempt amount and your rate band, which vary with your wider circumstances. Coinfig reports the gain, not your final liability.

Crypto received as income, for example from staking rewards, mining, airdrops or payment for work, is generally taxable at its market value on the day you receive it.

Coinfig records these as income events valued at the time of receipt, kept separate from the capital gains on any later disposal. For how a specific reward should be treated, check with a tax adviser.

Yes. When you connect an exchange through its API, Coinfig uses read-only access to import your transaction history. It cannot place trades or move funds.

If you prefer not to share an API key, you can also import your history by CSV from most exchanges.

No. Coinfig provides calculations and reports based on the data you import and the settings you choose. It does not provide personalised tax advice, and it does not imply any endorsement or approval by HMRC.

For complex situations, such as business trading, mining or unusual transactions, consult a qualified tax adviser. You remain responsible for what you file.