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Crypto mining tax for UK miners: income, CGT and the two-step.

Mining rewards are taxable in the UK on receipt, valued in sterling at the date you receive them, and again when you dispose of the mined tokens. These are two separate tax events. The receipt triggers income tax (as miscellaneous income, or as trading income if the activity amounts to a trade). The disposal triggers CGT on any gain above the receipt-date value, which is your base cost. Missing either leg, or double-counting, are the two errors that make DIY mining returns wrong.

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Two steps
Mining rewards: income tax on receipt at sterling value, then CGT on later disposal above that base cost. Two separate tax events, not one
£1,000
Miscellaneous income allowance may shelter small-scale mining receipts from income tax. Does not remove CGT on the later disposal
CGT
Later disposal of mined tokens is a separate CGT event using the receipt-date sterling value as base cost

What makes miners tax different.

Missing the receipt-income leg

Most DIY miners report only the sale of their tokens and miss the income event on receipt. HMRC's guidance is clear: mining rewards are taxable as miscellaneous income (or trading income) on the date of receipt, valued in sterling at that date. That sterling value is also your CGT base cost. Omitting it produces an understated income tax bill and a wrong capital gain.

Hobby or trade: the wrong classification has consequences

Whether your mining is miscellaneous income or trading income depends on the degree of organisation, scale, and commercial intent. Trading treatment is not automatically better: trading profits are subject to income tax at up to 45% plus Class 4 NIC. The classification is a badges-of-trade judgment on the facts, with no bright-line threshold.

Where the £1,000 allowance helps and where it does not

The trading and miscellaneous income allowance can shelter up to £1,000 of mining receipts from income tax in a year where total receipts are below that threshold. It does not remove CGT on the later disposal of those tokens. The income calculation and the CGT calculation are separate, and the allowance applies only to the income leg.

Cost deductibility is facts-dependent

Whether electricity, hardware, pool fees and other mining costs are deductible depends on whether the activity is a trade (in which case trading-expense rules apply) or a source of miscellaneous income (where relief is more limited). We do not assert a fixed deduction rule; the answer depends on the specific facts of your operation.

How we help miners.

Full two-step calculation: income and CGT, both legs

We value your mining receipts in sterling at the date of receipt, calculate income tax on the receipt leg, apply the £1,000 allowance where it is available, and carry the receipt values forward as CGT base costs. When you sell or swap the mined tokens, we calculate the CGT gain correctly using those base costs.

Hobby-vs-trade classification with a documented basis

We assess your mining activity against the badges of trade and produce a classification that supports your Self Assessment position. Where cost deductibility depends on the treatment, we assess that too and route genuinely uncertain items to the correct HMRC guidance rather than asserting a deduction that may not hold.

Unreported mining years and voluntary disclosure

Miners with unreported receipt-income years face both the omitted income and the wrong base cost on any subsequent disposal. Voluntary disclosure through HMRC's dedicated cryptoasset service is available. We quantify the exposure across open years and manage the disclosure, aiming for the lowest penalty band available for unprompted disclosure.

Common questions

How is crypto mining taxed in the UK?
In two steps. Mining rewards are taxable as income (miscellaneous or trading, depending on the scale and organisation of the activity) on the date of receipt, valued in sterling at that date. When you later sell or swap the mined tokens, CGT applies to any gain above the receipt-date sterling value, which is your base cost.
Do I pay tax when I mine or only when I sell?
Both. The receipt of mining rewards is an income event. The later disposal is a separate CGT event. Both must be reported. The income on receipt also sets your CGT base cost, so the two legs are connected but they are not the same event.
Does the £1,000 allowance make my mining tax-free?
Only for income tax, and only if your total trading and miscellaneous income from all sources in the year is below £1,000. It does not remove CGT on the later disposal of the mined tokens. If your mining receipts exceed £1,000 in the year, the allowance is not available at all.
Is my mining a hobby or a trade for tax?
The classification depends on the degree of organisation, scale, commerciality, and other badges-of-trade factors. There is no bright-line frequency or equipment threshold. HMRC applies the same analysis as for any other activity that could be a trade. Trading treatment is not automatically better: trading profits are taxed at income tax rates plus Class 4 NIC.
Do I pay tax again when I sell what I mined?
Yes, if there is a gain above your base cost. The base cost is the sterling value at which the reward was assessed as income on receipt. If you sell at a higher sterling value, the difference is a capital gain subject to CGT. If you sell at exactly the receipt-date price, the CGT gain is nil.
Can I deduct my electricity and hardware costs?
It depends on whether your mining activity is treated as a trade or as a source of miscellaneous income. Deductibility rules differ between the two treatments. We assess the facts of your operation before advising on costs; we do not assert a deduction that may not be available for your specific classification.

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