Quick comparison
Mining creates taxable income on receipt, while buying triggers CGT on sale.
The table below compares core criteria and after-tax outcomes.
| Criterion |
Buy (Individual) |
Mine (Hobby) |
Mine (Sole trader) |
Mine (Limited company) |
| Immediate tax event |
None |
Income Tax on receipt |
Income Tax and NICs |
Corporation Tax on income |
| Tax on later sale |
CGT on gain |
CGT on gain |
CGT on personal disposal if applicable |
Corporation Tax on trading profit; shareholder tax on distributions |
| Allowable costs |
Acquisition cost only |
Limited offsets; household apportionment needed |
Electricity, pool fees, capital allowances |
Full business deductions and capital allowances |
| Typical tax rate on profit |
CGT 10%/20% |
Income Tax bands 20/40/45% |
Income Tax bands plus NICs |
Corporation Tax 25% |
| Admin burden |
Low |
Low but risky for HMRC queries |
Medium |
High |
Quick flow
1. Mine: record the GBP value at receipt.
2. Deduct allowable costs if trading.
3. Pay Income Tax (individuals) or Corporation Tax (companies) at receipt.
4. Later disposal: CGT or company tax rules apply.
Numbers to check
Income Tax 20/40/45% (2024)
CGT 10/20% (2024)
Corporation Tax 25% (from 2023)
Tax treatment summary
Mined coins create income at receipt under HMRC guidance.
HMRC's Cryptoassets Manual sets the core rule for miners.
Keep clear, time-stamped records to avoid HMRC issues.
When CGT applies
CGT applies on disposals for both bought and mined coins.
The base cost differs if coins were bought or received as income.
When to choose mining
Choose mining when after-tax returns beat buying after costs and allowances.
Small domestic setups rarely clear this hurdle unless electricity is very cheap or reliefs are available.
Companies and scale change the picture substantially.
Check profitability over several years before deciding.
Advantages of mining
Mining produces coins without an upfront purchase cost.
Trading businesses can claim capital allowances on qualifying hardware.
Limitations of mining
Mining creates an immediate taxable income event.
That income can push the miner into higher tax bands quickly.
Practical trigger points
HMRC assesses trade status by the facts and circumstances, not by a single £ value.
Regularity, scale, organisation and profit motive are key indicators.
A higher gross yield makes trading classification more likely.
A common case: a hobby miner with regular large yields became classified as a trader.
When to choose buying
Buy when simplicity and low immediate tax exposure matter.
Buying avoids an income tax event at receipt and uses the acquisition cost as the base for CGT.
Buying suits investors with low turnover and limited admin appetite.
Advantages of buying
Buying gives a clear acquisition cost and simpler CGT reporting.
It avoids the immediate spike in taxable income that mining causes.
Limitations of buying
Buying still triggers CGT on disposal when gains exceed the allowance.
Gains above the annual allowance pay CGT at 10% or 20% depending on income.
Practical trigger points
If holdings are long term and volume is small, buying usually lowers compliance risk.
Buying fits those who cannot separate household energy for tax purposes.
Choosing the right structure
Choice depends on scale, risk and desired tax timing.
Hobby status suits very small, irregular miners.
Sole trader suits regular miners below the scale where corporate benefits appear.
Companies suit larger operations that want to retain earnings.
Hobby vs trade
Hobby miners are not automatically taxed on every coin received.
HMRC will look at frequency, commerciality and intention to profit.
Casual, irregular mining with no profit intent often stays in the capital camp.
Regular, profit-driven activity will likely be trading income at receipt.
Trade status makes mining proceeds taxable at Income Tax rates.
Sole trader specifics
Sole traders report mining income on Self Assessment SA103.
They can deduct allowable expenses and claim capital allowances on plant.
Limited company specifics
A company recognises mined coins as taxable income and pays Corporation Tax.
Companies claim capital allowances under company rules.
The evidence points to a common mistake: many individuals treat mined coins as only subject to CGT when sold.
The most frequent error is failing to keep time-stamped GBP valuations at receipt.
HMRC expects contemporaneous evidence and will query missing records.
Simple mining vs buying calculator
Inputs:
- Annual BTC mined (BTC)
- BTC price at receipt (GBP)
- Electricity (GBP per year)
- Pool fees (GBP per year)
- Hardware cost (GBP)
- Expected sale price per BTC (GBP)
- Personal tax band (basic/higher/additional)
- Company? (yes/no)
Outputs:
Mining:
- taxable income at receipt = BTC mined * price at receipt
- taxable profit = income - electricity - pool fees - capital allowances
- immediate tax = taxable profit * income tax rate
Sale:
- CGT base = price at receipt
- gain = sale price - base
Buying:
- acquisition cost = purchase price
- CGT at disposal = gain * CGT rate
- Net after tax = sale proceeds - taxes - costs
Example values row
0.1,25000,3000,200,4000,30000,higher,no
What no one tells you
Pay attention to valuation evidence, timing and hardware disposal accounting.
HMRC can challenge valuations made after the event.
A common case: a domestic miner deletes exchange CSVs and cannot prove GBP values.
That scenario can trigger an HMRC amendment and penalties.
Capital allowances nuance
Hardware often qualifies as plant and machinery for capital allowances.
The Annual Investment Allowance has changed over time.
Recent policy windows allowed first‑year relief, but rules do change.
If AIA is claimed, the full cost can reduce taxable profit in the purchase year.
A later sale may create a balancing charge that brings back part of the relief.
Claiming and tracking these allowances changes the mining versus buying economics.
Energy apportionment traps
Using home electricity complicates allowable expense claims.
A clear meter or separate business supply strengthens the claim.
That approach reduces HMRC challenge risk.
Capital allowances for bitcoin equipment, practical points.
- Mining rigs and associated plant generally qualify as plant and machinery for capital allowances
- A trading sole trader or company can often deduct the cost via the Annual Investment Allowance (AIA) where available, or otherwise claim writing‑down allowances (main pool typically 18% reducing‑balance, with a lower special‑rate pool for certain assets). If you claim AIA and deduct the full cost on purchase, you reduce trading profit in the year of acquisition and so cut Income Tax or Corporation Tax at the relevant rate
- If you later sell the rig you may face a balancing charge that effectively brings back part of the relief as taxable income
For example, a company buying £10,000 of rigs and claiming AIA reduces taxable profit immediately, saving tax at 25% now.
A disposal within the pool rules can generate a balancing charge.
Claiming and tracking these allowances should appear in any after‑tax model.
How to calculate after-tax cost and scenarios
Net cost equals total cash costs plus taxes less any allowances.
Model two realistic scenarios: a basic taxpayer and a higher taxpayer.
Each scenario uses specific electricity and hardware inputs.
Scenario: basic taxpayer
Assume receipt of 0.5 BTC at £25,000 per BTC, giving £12,500 income.
Electricity and fees £1,500.
Taxable profit £11,000 taxed at 20% produces £2,200 tax now.
Later sale at £30,000 per BTC creates CGT on the £2,500 uplift per 0.5 BTC.
Scenario: higher taxpayer
Assume receipt of 0.5 BTC at £25,000 and electricity £3,000.
Taxable profit £9,500 taxed at 40% produces £3,800 tax now.
Later sale creates CGT on the uplift.
Combined tax often exceeds buying unless capital allowances or company reliefs apply.
For most small domestic miners, buying is cheaper and less risky, except when electricity costs are unusually low or allowances and a corporate structure reduce the immediate income tax hit.
Mining becomes attractive only when after‑tax cash flow shows higher net returns in three to five years and robust records exist.
Decide using the spreadsheet, and register the correct tax status before trading.
Not applicable if you are not UK tax resident, are operating purely as an institutional trader under other jurisdictions, or when mining is trivial and coins are never disposed of. For airdrops, staking and different token types, follow specific HMRC guidance.
Worked after-tax comparison:
- mining versus buying (numeric example). Suppose you either buy 0.5 BTC for £12,500 today and later sell it for £15,000, or you mine 0.5 BTC that is recognised as income at the same £12,500 receipt value.
Basic-rate individual: buying → disposal gain £2,500 taxed at CGT 10% = £250, net after-tax proceedings = £15,000 − £250 = £14,750 (no immediate tax, assume no other costs).
Mining (no capital allowances, electricity £1,500): immediate taxable profit = £12,500 − £1,500 = £11,000 at Income Tax 20% = £2,200.
On disposal the base cost is £12,500 so the £2,500 uplift pays CGT 10% = £250.
Net after-tax proceeds = £15,000 − £250 − £2,200 = £12,550.
Higher-rate example: identical numbers but income tax 40% on mining makes the mining route materially worse.
This direct numeric comparison shows how immediate income taxation changes after-tax outcomes compared with buying.
Frequently asked questions
Is bitcoin mining taxable in the UK?
Yes. HMRC treats receipt of mined coins as taxable income at market value when obtained.
Later disposals may trigger CGT.
HMRC's Cryptoassets Manual explains valuation and reporting expectations.
Is mining bitcoin cheaper than buying?
It depends on tax status, electricity, hardware costs and tax band.
Buying avoids immediate Income Tax; mining normally incurs Income Tax at receipt.
Mining may be costlier for higher-rate taxpayers unless reliefs or company structures apply.
How should mined coins be valued for HMRC?
Value mined coins in GBP at the exact receipt time using a reputable exchange or market index.
Retain screenshots or CSVs showing timestamped prices for at least five years as evidence.
Do miners need to register for self assessment?
If mining produces taxable income, the individual should register for Self Assessment.
Report the income on SA103 for sole traders.
Companies must file accounts and corporation tax returns with Companies House and HMRC.
Can electricity be claimed as an expense?
Yes if mining is a trade.
Apportion household use carefully and keep invoices.
Sole traders and companies can claim electricity with clear records.
Does VAT apply to mined coins?
Most mined coins are not VATable supplies, but VAT applies to rig purchases and hosting.
A VAT-registered business will normally reclaim VAT on equipment used in the business.
Domestic electricity is usually not VAT-deductible.
How long should mining records be kept?
Keep records for at least five to six years after the relevant tax year.
HMRC may open enquiries within this period and will request contemporaneous evidence.
VAT, energy billing and electricity apportionment for miners.
VAT applies to equipment and to hosting or colocation invoices.
A VAT-registered business will usually reclaim VAT on those purchases when used in the business.
By contrast, VAT recovery on domestic electricity is usually not available.
Using a dedicated business supply or separate meter creates a clearer basis to reclaim VAT.
Next steps and resources
The HMRC Cryptoassets Manual explains tax treatment for mining and valuation rules.
For corporation tax rates and allowances, reference HMRC and HM Treasury guidance.
HMRC Cryptoassets Manual
Corporation Tax rates (gov.uk)
