Home
/
Crypto tax

Crypto tax disclosure UK

If you have undeclared income or gains from cryptoassets, we work out what is actually owed across every year, choose the right disclosure route and handle the disclosure to HMRC end to end. Correct as at 17 August 2026.

What is the situation?

Crypto activity from past years was never reported: coins sold at a profit, tokens swapped for other tokens, staking or mining rewards, NFTs traded. HMRC now receives data on cryptoasset users, and UK cryptoasset service providers are required to collect identifying information from their customers for reporting to HMRC (gov.uk, information you need to give to UK cryptoasset service providers). Nudge letters citing cryptoassets are a regular trigger for the people who call us; if one has arrived, our nudge letter service covers the first step.

Which crypto transactions does HMRC treat as taxable?

More than most people expect. Selling crypto for pounds is a disposal, but so is swapping one token for another and using crypto to pay for goods or services, each one crystallising a gain or loss at that date. Rewards from staking, mining and some airdrops can be taxable as income when received. For individuals in 2026/27, gains above the £3,000 annual exempt amount are charged to Capital Gains Tax at 18% within the basic rate band and 24% above it (gov.uk, CGT rates and allowances). Years of frequent swaps produce long disposal histories, which is precisely why the computations need doing properly.

How do you disclose unpaid crypto tax to HMRC?

The route depends on the years and the facts. Liabilities for earlier years go through HMRC's dedicated cryptoasset disclosure service; income or gains for the current or previous tax year belong on a Self Assessment return instead (gov.uk, tell HMRC about unpaid tax on cryptoassets). Where the crypto sits with overseas platforms and the liability has an offshore dimension, the Worldwide Disclosure Facility may be the correct vehicle. The number of years disclosed follows behaviour: 4 where reasonable care was taken, 6 for carelessness, up to 20 for deliberate non-disclosure.

What do we do, step by step?

We pull the full transaction history from exchanges and wallets, reconstruct disposals using the share-matching rules, and compute gains, income, interest and the self-assessed penalty year by year. We prepare and submit the disclosure, and manage the timetable: HMRC issues a payment reference within 15 working days of receiving a disclosure, and payment is due within 30 days of submission (gov.uk, cryptoasset disclosure guidance). Where paying within 30 days is not possible, we raise it with HMRC before the deadline rather than after.

What does it cost to wait?

Interest accrues daily from the date each year's tax was originally due, and a disclosure made after HMRC writes to you is prompted, which places the penalty in a higher range than a voluntary one. If HMRC concludes the non-disclosure was deliberate, the look-back extends to 20 years and the penalties rise accordingly. The data flow to HMRC is only increasing; disclosure on your own initiative remains the cheapest version of this event.

Who handles crypto disclosures?

Crypto disclosure work is led personally by Ghulam Alahi, Managing Director, who has more than 25 years' experience of HMRC enquiry work, supported by a team that prepares the transaction-level computations.

Call 020 8554 2135 or email info@visionconsulting.co.uk. First conversations are confidential and at no cost.

Frequently asked questions

Increasingly, yes. UK cryptoasset service providers are required to collect identifying details from their users for reporting to HMRC, and HMRC already uses data from exchanges to send nudge letters to people whose returns show no crypto activity. A nudge letter does not mean HMRC has computed your liability; it means your name is in a dataset. The safe assumption is that disposals routed through any regulated exchange are visible, and that self-initiated disclosure beats waiting to be asked.

Any disposal can crystallise a capital gain or loss: selling for pounds, swapping one token for another, and using crypto to pay for goods or services all count as disposals at their date. Rewards from staking, mining and some airdrops can be taxable as income when received, separately from any later gain on disposal. Simply buying and holding is not a taxable event. The common error is assuming tax only arises when money reaches a bank account; HMRC's rules do not work that way.

For individuals in 2026/27, gains above the £3,000 annual exempt amount are charged to Capital Gains Tax at 18% to the extent they fall within your unused basic rate band and 24% above it. Income-type receipts such as staking rewards are taxed at your Income Tax rates instead. On a disclosure, interest is added daily from each year's original due date and a behaviour-based penalty is applied on top, so the final figure depends on more than the headline rates.

It follows the behaviour that caused the underpayment. Broadly 4 years if you took reasonable care but still underpaid, 6 years if you did not take enough care, and up to 20 years if you knew tax was due and chose not to declare it. HMRC treats this self-assessment of behaviour as part of the disclosure itself, and pitching it wrong in either direction creates risk. We take that judgement on the evidence in your transaction history and correspondence.

For earlier years, through HMRC's online cryptoasset disclosure service, which requires the transaction history, the gains and income computations, interest and a self-assessed penalty. Current and previous tax year figures go on a Self Assessment return instead. HMRC sends a payment reference within 15 working days of receiving the disclosure, and payment of the full amount is due within 30 days of submission. An agent can prepare and submit the whole disclosure on your behalf with temporary authorisation.

The tax analysis is unchanged; UK residents are taxable on their crypto gains regardless of where the platform sits. What can change is the disclosure route, because liabilities connected to offshore matters may fall within the Worldwide Disclosure Facility, which has its own 90-day timetable and offshore penalty rules. Offshore penalty loadings can substantially exceed the onshore equivalents, which makes route selection worth getting right at the start. We assess this before anything is submitted.

This is general information, not advice. Your position depends on your circumstances. Speak to us before acting.