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Crypto Tax Calculator — United Kingdom

An educational estimator using United Kingdom's 2025/26 rules — not tax advice, and not a substitute for a professional.

Estimated tax owed
£1,260
on £10,000 of gains
Effective rate
12.6%
of the full gain
Taxed at 18% (basic band)£1,260

2025/26 rules verifiedJul 11, 2026

Estimates only — not financial advice.

How this is calculated

The estimator applies United Kingdom's headline capital-gains rules for the 2025/26 tax year directly to your inputs — allowances and thresholds first, then the applicable rate schedule, exactly as listed in the breakdown table. Bracket data lives in an open, editable data file stamped "verified 2026-07-11" (methodology).

What it deliberately ignores: cost-basis method choices, loss offsets, carried-forward losses, local/state surcharges and edge cases like business classification. Those are where tax software earns its keep.

How United Kingdom taxes crypto — the essentials

  • Everyone gets a £3,000 annual exempt amount — only gains above it are taxed.
  • Gains that fit inside your unused basic-rate band are taxed at 18%; the rest at 24%.
  • HMRC treats crypto as an asset: swapping one coin for another is a disposal, not just cashing out to pounds.
  • The personal allowance (£12,570) shrinks once income passes £100,000 — this estimator ignores that taper.
  • UK uses share-pooling (Section 104) plus same-day and 30-day rules to work out cost basis.
  • Losses can be claimed to reduce gains — report them to HMRC within 4 years.

Official guidance: GOV.UK — Capital Gains Tax rates

Frequently asked questions

How is crypto taxed in United Kingdom?
Everyone gets a £3,000 annual exempt amount — only gains above it are taxed. Gains that fit inside your unused basic-rate band are taxed at 18%; the rest at 24%. The bullet summary below covers the rest, with a link to the official GOV.UK guidance.
Is this my final tax bill?
No — it's an educational estimate based on the headline rules and your inputs. Real returns involve cost-basis methods, loss harvesting, other income interactions and local surcharges. Use it to size the liability, then confirm with software or a professional.
Do I owe tax if I only swapped one crypto for another?
In United Kingdom, swapping is generally treated as a disposal of the coin you gave up — a taxable event even though no fiat touched your bank account. Only buying with fiat and holding is reliably tax-free.
What about staking rewards?
Most jurisdictions tax staking rewards as income when received — separately from the capital gains this tool estimates. See how staking rewards are taxed for the five-country breakdown.

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Disclaimer: This tool provides educational estimates only — it is not financial, investment or tax advice and not a substitute for a qualified tax professional. Crypto assets are volatile; past performance does not guarantee future results. See our methodology and full disclaimer.