Mining hardware is usually capital expenditure, not an immediate revenue deduction. You may claim capital allowances on qualifying ASICs, rigs and business equipment only if mining is a taxable trade. Non-trading mining income usually cannot use them.
The Annual Investment Allowance is normally £1 million. Electricity and repairs follow different rules.
Trade status decides whether hardware relief exists
A mining rig can qualify for capital allowances only when it serves a qualifying trade. HMRC considers scale, organisation, records, profit motive and whether mining can make money after power and equipment costs.
Commercial planning and records made at the time are useful evidence. Think of a trade as a business that is run to make a profit.
Profit by itself does not decide the issue.
Signs your mining may be a trade
Mining may look more like a trade when you run it in an organised way. Keep a plan, track uptime, monitor costs and review expected profits.
HMRC will look at the whole picture. A large ASIC setup alone does not prove a trade.
The most common mistake is to treat regular mining as a trade without checking whether it could realistically make money.
Profit alone is not enough
A profit can support your case, but it is not the only test. HMRC also looks at how you run the activity.
A loss does not automatically prevent trade status. However, repeated losses with no credible profit plan can weaken the claim.
Choose the trade route only if your facts support it. The next section shows why each cost needs its own tax treatment.
Sort each mining cost before claiming it
Equipment that gives value for more than one period is normally capital expenditure. Recurring running costs are normally revenue expenditure. The nature of the cost matters, not the invoice label.
Capital spending is like buying an oven for a bakery. Electricity to run that oven is a day-to-day cost.
| Cost and typical price | Usual tax category | Relief route | Record needed |
|---|
| ASIC, often £1,500 to £6,000 | Capital asset | AIA or writing-down allowance, if trading | Invoice, ownership, first business-use date |
| GPU rig, often £800 to £3,000 | Usually capital asset | Capital allowances, if trading | Invoice and business-use split |
| Electricity, pool and hosting fees | Revenue cost | Actual expense deduction, where allowed | Bills, pool statements, apportionment |
| New extraction or electrical installation | Usually capital improvement | May need capital allowance analysis | Installer invoice and specification |
Assets that are normally capital
An ASIC or GPU rig is normally capital expenditure. It may qualify as plant and machinery when used in a trade.
A laptop used only to monitor mining may also qualify. Reduce the claim if you also use it privately.
Portable cooling kit needs its own review. Fixed ventilation, wiring and extraction work may instead improve the premises.
Costs normally claimed as revenue
Electricity, pool fees, routine repairs and hosting charges are usually revenue costs. They must be wholly and exclusively for the activity.
Classify each item on its own facts. Do not treat the whole mining setup as one expense.
Capital costs usually cannot be deducted again from a later token gain. That distinction matters before you choose a claim route.
A trading miner can use AIA for equipment
A trading miner can often claim the Annual Investment Allowance on qualifying ASICs and rigs. AIA gives 100% relief when equipment enters business use.
The normal AIA limit is £1 million. You must own the asset and use it in the trade.
AIA versus writing-down allowances
AIA gives immediate relief up to your available limit. Writing-down allowances spread relief across several years.
The main pool rate is commonly 18% for qualifying plant and machinery. Sale proceeds can create a balancing charge after an allowance claim.
AIA looks best on paper, but it fails if mining is not a trade. Check status before making a claim.
Keep the evidence HMRC would ask for
Mining equipment tax route
Bought an ASIC or rig→Is mining a trade?→Yes: test AIA or writing-down allowancesNo: do not assume hardware relief
Record each token in GBP on receipt. Hardware relief affects income tax. It does not reduce later CGT acquisition cost.
Keep records that connect each claim to the facts. Save invoices, payment proof, serial numbers and finance or lease agreements.
Record when each ASIC, GPU or computer first became available for business use. Photos and configuration records can also help.
Keep your mining plan, hashrate data, uptime data and pool statements. Keep wallet records, electricity bills and hosting contracts too.
These records should show expected profit after power costs. They should also support the GBP value of rewards received.
Where a machine or home supply has mixed use, record a fair business share. Review that share when use changes.
Choose AIA only when you can prove trade status, ownership and business use. The alternative can leave hardware costs with no direct relief.
Miscellaneous income may leave hardware stranded
When mining is miscellaneous income rather than a trade, the £1,000 allowance may be simpler. It can be worse where power and equipment costs are high.
The £1,000 allowance is a simplification. It is not an extra deduction that you add to actual costs.
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A dedicated expense record book can separate ASIC purchase proof from monthly power and pool costs. That split supports a clear Self Assessment calculation.
- Keeps equipment invoices apart from recurring electricity and pool charges
- Creates a dated record of when each miner first entered business use
- Makes private-use adjustments easier to explain if HMRC asks
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Keep income tax and CGT separate
Record each token's sterling market value when you receive it. That value is generally income at that time.
It also sets the starting cost for Capital Gains Tax. CGT can apply when you sell, swap or spend tokens.
Do not subtract the ASIC cost again from the later gain. That would count the same cost twice.
This guidance may not fit a limited company, leased equipment or activity outside the UK tax net. It also does not cover staking, validating or airdrops. Large losses and unclear trade cases need tailored UK tax advice.
A miner receives tokens worth £12,000 in a simplified year. They pay £3,500 for electricity and £500 in pool fees.
They also buy a qualifying ASIC for £3,000. If the facts support a trade, AIA could produce taxable profit of £5,000.
This is £12,000 less £4,000 revenue costs and £3,000 AIA. If mining is miscellaneous income, no capital allowance is available for the ASIC.
Assume the same £4,000 revenue costs are allowed. The taxable amount could then be £8,000.
The £1,000 allowance would instead produce £11,000 in this example. These figures exclude private use, VAT, losses and other reliefs.
This example shows why status comes first. Settle the facts before you file.
Questions & answers
Can I claim an ASIC as a business expense?
An ASIC is usually capital equipment, not an ordinary business expense. A trading miner may claim capital allowances, often AIA. Non-trading mining may not get similar hardware relief.
Does AIA cover bitcoin mining equipment?
AIA can cover qualifying ASICs, rigs and other plant used in a trading mining business. The normal annual limit is £1 million. You must prove ownership and business use.
Is the £1,000 allowance better for small miners?
The £1,000 allowance is often better only when allowable costs are below £1,000. You normally cannot claim it and deduct the same costs. This includes electricity, pool fees and repairs.
Can equipment costs reduce CGT on mined bitcoin?
Equipment costs do not normally reduce CGT when mined Bitcoin is sold. Use the GBP value when you received tokens as their starting cost. Then apply normal CGT rules.
The tax result follows the facts
The essentials:- ASICs and rigs are normally capital assets, not instant revenue deductions.
- AIA and writing-down allowances depend on mining being a genuine trade.
- Electricity and pool fees need their own revenue-cost analysis and private-use split.
- The £1,000 allowance is an alternative to costs, not a second deduction.
- Keep mining income calculations separate from the CGT cost of tokens received.
The defensible choice is clear. Claim capital allowances only where you can prove a real mining trade.
Do not invent a revenue deduction where the facts do not support it. Check your records against Self Assessment rules before filing.
Report later token disposals separately.
Further reading
If you want to learn more about this topic, these sources may interest you:
