UK Crypto Mining Tax and HMRC Guide

HM Revenue & Customs treats cryptoasset mining according to the actual activity and applicable tax rules; there is no special exemption merely because rewards arise from a blockchain. HMRC states that a business involved in mining may be liable to Income Tax, National Insurance, Corporation Tax, Capital Gains Tax or Corporation Tax on chargeable gains and VAT, depending on the person and the facts.

This guide concerns UK tax principles for proof-of-work mining and pool rewards. It does not determine anyone's residence, domicile, permanent establishment, employment status, accounting treatment, VAT position or entitlement to relief. The Mining Shop UK Limited does not act as a tax adviser, accountant, investment adviser or agent for HMRC.

Primary references include HMRC's business mining guidance (CRYPTO40200), individual mining guidance (CRYPTO21150) and business tax overview (CRYPTO40050). Guidance and rates can change; check the current source and obtain advice for your circumstances.

Whether mining amounts to a taxable trade is a question of fact. HMRC identifies the degree of activity, organisation, risk and commerciality as relevant factors. HMRC gives the contrasting examples that incidental use of spare home-computer capacity would not normally be a trade, while purchasing a bank of dedicated computers to mine for an expected net profit would probably be trading activity.

If mining is a trade, rewards are trading receipts and profits are calculated under the rules applying to that trade and its legal form. A company normally accounts through Corporation Tax; an individual or partnership may have Income Tax and National Insurance consequences. Cryptoassets held as trading stock must be accounted for consistently.

If an individual's mining does not amount to a trade, HMRC says the pound-sterling value of tokens at receipt is generally taxable as miscellaneous income, with appropriate revenue expenses potentially reducing the amount chargeable. Capital allowances are not normally available against miscellaneous income, so a non-trader should not assume the ASIC purchase price can be deducted.

Pool participation does not remove the tax point. Record the gross or net reward credited under the pool contract, the token quantity, receipt time, pool fee and a supportable sterling valuation methodology. Ask an adviser how the pool's payout mechanics affect the precise receipt time and gross-versus-net presentation.

Income and business accounts must be prepared in pound sterling. Preserve the exchange or pricing source, timestamp, exchange pair and calculation used to value each reward when received. A later change in token value does not retrospectively alter the original income amount.

Keeping a mined token after it has been recognised as income can create a second tax stage when it is later sold, exchanged for another token, used to pay for goods or services, or given away. Depending on the owner and whether the token remains trading stock, the later result may fall within trading profits, Capital Gains Tax or Corporation Tax on chargeable gains. A transfer between wallets under the same beneficial ownership is not normally a disposal.

For personal capital-gains calculations, tokens of the same type are commonly dealt with through the section 104 pool together with same-day and 30-day matching rules. Costs already deducted from income or trading profits cannot be deducted again from a capital gain. HMRC also states that mining electricity and equipment are not acquisition costs of the mined tokens for section 38 capital-gains purposes, although some costs may instead be relevant to trading profits or to the disposal of the equipment.

See HMRC's disposal guidance, token pooling guidance and allowable-cost guidance.

Keep a durable audit trail for every miner and reward, including:

• miner model, serial number, purchase invoice, commissioning date, ownership and business-use evidence;
• pool legal name, account identifier, contract terms, fee schedule, worker names and payout threshold;
• wallet addresses, transaction IDs, reward type, token quantity, date and time of receipt;
• the sterling value at each tax point, valuation source and calculation;
• electricity meter data, tariff, hosting invoices, pool fees, maintenance, insurance and other claimed costs;
• all later transfers, exchanges and disposals, including fees and beneficial ownership; and
• accounts, tax returns, capital-allowance computations and advice relied upon.

HMRC warns that exchanges and service providers may not retain records indefinitely; the taxpayer remains responsible for its own records. From 1 January 2026, in-scope UK reporting cryptoasset service providers have Cryptoasset Reporting Framework due-diligence and reporting duties, but third-party reporting does not replace the customer's own return.

Review the position before commissioning equipment, changing from solo to pooled mining, routing rewards to another person, incorporating a business, moving hardware or people overseas, or materially changing scale. Use a UK accountant or tax adviser experienced in cryptoassets and retain written conclusions. If historic income or gains were omitted, obtain advice promptly and consider HMRC's cryptoasset disclosure service.