UK Crypto Capital Gains Tax Calculator
✓ 2026/27 HMRC Tax Year VerifiedCalculate your exact UK Capital Gains Tax liability on Bitcoin, Ethereum, Solana, and altcoin disposals for the 2026/27 tax year. Automatically applies the statutory £3,000 Annual Exemption, models 18% Basic Rate vs 24% Higher Rate CGT tiers, deducts allowable exchange fees, and offsets prior year capital losses.
Crypto Disposal & Income Details
Swapping one crypto for another (e.g. BTC → ETH) is legally treated as a taxable disposal at market value, exactly like selling for GBP cash.
Statutory Tax Calculation Waterfall (2026/27)
📌 Key UK Crypto Tax Rules for the 2026/27 Tax Year
- Capital Gains Tax Rates: Crypto gains are taxed at 18% for Basic Rate taxpayers and 24% for Higher and Additional Rate taxpayers.
- Annual Tax-Free Exemption: Every UK resident individual has a statutory allowance of £3,000 for the 2026/27 tax year (£6,000 for married couples using inter-spousal transfers).
- Crypto-to-Crypto Swaps: Exchanging Bitcoin for Ethereum, Solana, or stablecoins (e.g. USDT, USDC) is legally a taxable disposal under HMRC rules, calculated at fair GBP market value.
- CARF & HMRC Data Sharing: From 2026 under the Cryptoasset Reporting Framework, domestic and international exchanges automatically report user transactions and balances to HMRC.
HMRC Crypto Capital Gains Tax Rates & Thresholds (2026/27)
Under the Taxation of Chargeable Gains Act 1992 (TCGA 1992) and official HMRC Cryptoassets Manual (CRYPTO10000), cryptoassets—including Bitcoin, altcoins, utility tokens, and stablecoins—are treated as chargeable assets. The tax rate applied to your net crypto gains depends entirely on your total taxable income from employment, self-employment, pensions, and rental dividends.
Allowable vs Non-Allowable Crypto Expenses Under HMRC Rules
To minimize your statutory Capital Gains Tax liability, HMRC allows you to deduct specific acquisition and disposal costs under TCGA 1992 s.38. Enter these into the Allowable Exchange & Gas Fees input on our calculator to automatically reduce your taxable gain.
✅ 100% Allowable (Tax-Deductible)
- Exchange Trading Fees: Maker/taker fees charged by centralized exchanges (Coinbase, Kraken, Binance).
- Blockchain Network Gas Fees: Transaction fees paid on Ethereum, Solana, Polygon, or Arbitrum to execute swaps or contract calls.
- Professional Valuation Costs: Fees paid to accountants or specialized valuers to establish fair market value of illiquid tokens or NFTs.
- Advertising Costs: Direct costs paid to find a buyer or seller for over-the-counter (OTC) crypto transactions.
❌ Non-Allowable (Cannot Deduct)
- Fiat Banking Transfer Fees: Bank deposit or withdrawal charges when moving GBP between your high-street bank and exchange.
- General Hardware Wallets: Purchase costs for Ledger or Trezor hardware wallets (treated as general capital equipment, not direct disposal costs).
- Crypto Software Subscriptions: Monthly or annual fees paid for portfolio trackers or charting subscriptions.
- Mining Electricity (Personal): Power costs for hobbyist mining (unless operating an active registered trading business).
How HMRC Calculates Your Crypto Cost Basis: The 3 Share-Matching Rules
You cannot simply use "First-In, First-Out" (FIFO) or pick which specific tokens you sold to maximize profit or loss. HMRC requires crypto investors to follow the strict statutory share-matching order set out in TCGA 1992 s.104–106:
1. The Same-Day Rule
Tokens of the same cryptocurrency acquired on the exact same calendar day as the disposal are matched first. The cost basis equals the price paid for those same-day tokens.
2. The 30-Day “Bed & Breakfasting” Rule
Tokens repurchased within 30 days following a disposal are matched next. This prevents investors from "bed-and-breakfasting" (selling at a loss on day 1 to trigger a tax relief claim and immediately rebuying on day 2).
3. The Section 104 Holding Pool
All remaining tokens of a specific cryptocurrency (e.g. all your historical BTC) are pooled into a single Section 104 holding. The cost basis is the weighted average acquisition cost of all tokens currently in that pool.
What Triggers a Taxable Crypto Disposal in the UK?
1. Selling Crypto for Fiat
Converting Bitcoin, Ethereum, or altcoins into GBP, EUR, or USD cash on any exchange or OTC desk.
2. Crypto-to-Crypto Swaps
Swapping one cryptoasset for another (e.g. BTC → ETH, or SOL → USDC) triggers CGT based on the GBP value at the moment of the trade.
3. Spending on Goods & Services
Using cryptocurrency or a crypto debit card to buy a laptop, flight, coffee, or pay a bill is treated as a disposal at open market value.
4. Gifting Crypto
Gifting tokens to friends, family, or children triggers CGT on the gain. Transfers to a legal spouse or civil partner are 100% exempt.
Worked Example: Calculating Crypto CGT on a £25,000 Disposal
Scenario: Alex earns £38,000 annual salary (Basic Rate taxpayer). In November 2026, Alex sells 0.5 BTC for £35,000. Under Section 104 pooling, the allowable purchase cost basis was £10,000. Alex incurred £500 in total exchange commissions and gas fees.
• Higher Rate Band excess (£21,500 - £12,270) = £9,230 taxed @ 24% = £2,215.20
Explore Our Complete UK Crypto Tax Calculator Suite
Section 104 Pooling Calculator →
Track multi-year purchases, calculate weighted average cost bases, and manage Same-Day and 30-Day bed-and-breakfasting rules.
Crypto Staking & DeFi Tax Calculator →
Model miscellaneous Income Tax on Proof-of-Stake yields, liquidity pool tokens, and dual CGT on subsequent disposals.
Crypto Mining & Node Tax Calculator →
Calculate hobbyist vs commercial mining liabilities, Class 2/4 NICs, electricity expense deductions, and hardware capital allowances.
Frequently Asked Questions About UK Crypto Capital Gains Tax
What is the UK crypto capital gains tax allowance for 2026/27?
The statutory UK Capital Gains Tax Annual Exempt Amount for 2026/27 is £3,000 per individual. Married couples and registered civil partners can transfer crypto assets to each other tax-free under TCGA 1992 s.58 prior to a sale, effectively combining their exemptions to achieve up to £6,000 in completely tax-free capital gains.
Does HMRC know about my cryptocurrency trades?
Yes. Under the OECD Cryptoasset Reporting Framework (CARF) and HMRC data-sharing notices, UK-registered and overseas centralized exchanges (including Coinbase, Kraken, Binance, and OKX) routinely share user KYC details, transaction histories, wallet addresses, and gross sales figures directly with HMRC.
How do I report crypto capital gains on my UK Self Assessment tax return?
You report your crypto gains on the SA108 Capital Gains summary supplementary pages of your Self Assessment tax return. You must declare the total number of disposals, gross disposal proceeds, allowable costs, and net chargeable gains. The online filing and payment deadline is 31 January following the end of the tax year.
Can I claim relief for lost, stolen, or rug-pulled crypto?
If a token has become completely worthless or a protocol has collapsed, you can submit a Negligible Value Claim to HMRC. This creates a deemed disposal and immediate reacquisition at nil value, allowing you to crystallize an allowable capital loss that can offset other crypto or stock market gains for up to 4 tax years.
Do I pay tax when transferring crypto between my own private wallets?
No. Transferring crypto between your own accounts (e.g. from Coinbase to a Ledger hardware wallet, or from MetaMask to Phantom) is not a taxable disposal because beneficial ownership does not change. However, network gas fees paid to move tokens are generally not deductible as a disposal expense unless connected directly to a sale.
How We Calculated This
- Input variables: Enter the relevant amounts, rates, or percentages in the form.
- Real-time breakdown: The calculator applies HMRC rules and thresholds for the 2026/27 tax year to process the values.
- Display outputs: The visual graphs, donut charts, and tables are compiled dynamically to show your net take-home and deductions.
Real-World Examples
A basic calculation applying standard UK tax bands and allowances.
Calculation runs based on standard HMRC rules.
Factoring in a percentage of salary sacrifice or pension contributions.
Deductions are calculated and adjusted accordingly.
Frequently Asked Questions
Yes, all calculators are fully updated with the latest HMRC thresholds, personal allowances, and National Insurance rates for 2026/27.
These tools are for estimation and illustrative purposes only. For official tax returns, please consult a qualified accountant or reference HMRC directly.