Crypto Capital Gains Tax
Token disposals are reconstructed in sterling before allowable costs, matching rules, capital losses and the annual exempt amount are applied.
Crypto tax is transaction based. Selling Bitcoin for sterling can create a disposal, but so can exchanging one token for another, using crypto to buy goods or services and gifting tokens to another person. Mining, staking, lending and some DeFi rewards can create Income Tax before a later disposal creates a separate Capital Gains Tax calculation.
We reconstruct the transaction history before calculating the tax. Exchange downloads alone are often incomplete where assets have moved between exchanges, self-custody wallets, bridges or DeFi protocols, so beneficial ownership and wallet movements need to be separated from genuine taxable disposals.
Approximate transaction numbers, platforms and tax years are sufficient initially. Full exchange and wallet records can follow securely.
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The first task is to reconstruct what actually happened to the cryptoassets. A wallet transfer, token sale, token swap and staking reward can look similar in raw blockchain data while having different tax consequences.
Crypto tax software can assist with transaction matching, but the tax calculation still depends on correct classification. Transfers between wallets under the same beneficial ownership should not normally be treated as disposals, while swapping Bitcoin for Ether, spending tokens or transferring beneficial ownership can create chargeable events.
The service can cover one disposal, an annual portfolio calculation or several years of exchange, wallet and DeFi activity requiring reconstruction and reconciliation.
Token disposals are reconstructed in sterling before allowable costs, matching rules, capital losses and the annual exempt amount are applied.
Separate pools are maintained for relevant fungible token types after applying same-day and 30-day acquisition matching.
Rewards are reviewed to determine whether miscellaneous income or trading treatment applies and to establish the CGT acquisition value for retained tokens.
Lending, staking, liquidity pools and tokenised positions are reviewed according to their legal and economic transaction structure rather than their platform label.
Disposal losses, negligible-value issues and historic loss claims are reviewed before they are used against chargeable gains.
Crypto gains and income are reconciled to the dedicated cryptoasset information and other relevant sections of the tax return or HMRC disclosure process.
The calculation follows the asset trail so that missing transfers and duplicated disposals are identified before gains and income are finalised.
Exchange exports, wallet addresses, blockchain history and previous tax calculations are assembled for the relevant period.
Movements between the taxpayer's own wallets are separated from disposals, acquisitions, rewards and transfers to other beneficial owners.
Income items are identified before same-day, 30-day and section 104 CGT calculations are completed for each relevant token.
Taxable income, gains, losses and supporting totals are reconciled to Self Assessment or the appropriate HMRC disclosure route.
A taxable crypto disposal is broader than converting tokens into pounds. HMRC treats several common crypto transactions as disposals for Capital Gains Tax purposes.
Crypto values need to be converted into pounds sterling at the time of the taxable transaction. The fact that an exchange statement is denominated in US dollars, euros, USDT or another token does not remove the requirement to calculate the UK tax figures in sterling.
HMRC's current guidance covers sales, token exchanges, spending, gifts, allowable costs and cryptoasset reporting.
Official crypto CGT guidance ↗HMRC's Cryptoassets Manual explains beneficial ownership, own-wallet transfers and crypto-to-crypto transactions.
HMRC disposal guidance ↗High transaction volume does not remove the ordinary tax rules. The calculation still has to identify taxable income first and then apply the relevant CGT matching rules to investment assets.
HMRC's Self Assessment returns have included a dedicated cryptoasset section from 2024/25 onwards. Separately, cryptoasset service-provider reporting rules operating from 2026 mean identifying and transaction information can increasingly be linked to taxpayers' HMRC records. Maintaining complete personal records remains important because an exchange may not hold the acquisition history from another platform or self-custody wallet.
HMRC's Cryptoassets Manual explains separate token pools, same-day matching, the 30-day rule and section 104 pooling.
HMRC pooling guidance ↗Current GOV.UK guidance covers employment payments, mining, staking, lending and later disposals of tokens already taxed as income.
Official crypto income guidance ↗A further change has been announced for certain cryptoasset loans and automated liquidity-pool arrangements from 6 April 2027. Draft rules are intended to introduce no-gain/no-loss treatment in specified circumstances so that CGT is deferred until an economic disposal. That change does not replace the current 2026/27 treatment and should not be applied early.
Crypto tax can involve personal CGT, overseas residence, historic disclosure and business or employment income depending on the taxpayer and activity.
The tax treatment depends on the transaction rather than the name of the platform or token, so the complete transaction trail needs to be considered.
Potentially, yes. Exchanging one type of cryptoasset for another is normally a disposal for Capital Gains Tax purposes even though no sterling is received.
Normally not where you retain beneficial ownership of the tokens throughout the transfer. Network and transaction costs still need to be considered correctly in the tax records.
Generally no for fungible investment tokens. The UK applies statutory matching rules, including same-day matching, the 30-day rule and then the section 104 pooled cost for remaining disposals.
HMRC treats NFTs as separately identifiable assets, so they are not normally pooled in the same way as fungible exchange tokens such as Bitcoin or Ether.
It can be. Where staking does not amount to a trade, HMRC generally treats the sterling value of staking rewards when received as miscellaneous income. A later disposal can then create a separate Capital Gains Tax calculation.
The same value should not simply be taxed twice. Where tokens have already been taxed as income, that taxed value is relevant to the subsequent CGT acquisition cost so that CGT is generally concerned with the later change in value.
The normal individual annual exempt amount is £3,000 for 2026/27. The general CGT rates are 18% and 24% depending on the individual's available basic-rate band, subject to the wider CGT rules.
Cryptoasset service providers are now subject to information-reporting requirements, including identifying information that can be linked to taxpayers. International exchange arrangements can also result in information from participating overseas providers being shared with HMRC.
The earlier years should first be recalculated using the correct transaction history, pools, income and losses. Depending on the years involved and whether HMRC has already contacted you, the correction may require an amended return or an HMRC disclosure rather than simply adding the historic figures to the current return.
Allowable capital losses can generally be used against chargeable capital gains, subject to the CGT rules. Historic losses need to have been properly notified within the applicable time limit before they can be relied upon later.
Not automatically. HMRC states that individuals carrying on a financial trade in cryptoassets are unusual. Whether an activity amounts to a trade depends on the facts, including factors such as organisation, commerciality, frequency and the nature of the activity.