United Kingdom Crypto Tax Calculator
Estimate a simple crypto gain or loss for a UK disposal using user-entered rates and an optional manual allowance adjustment. The tool is intentionally conservative and does not attempt to automate HMRC's pooling rules.
Beginner-friendly estimate
United Kingdom crypto tax calculator
Start with the simple view below. You only need one buy, one sell, and an estimated rate to get a quick tax estimate.
Rate estimate mode
Advanced options are helpful if you want to include fees, manual adjustments, or a separate long-term rate.
Official sources used
Last reviewed on June 12, 2026. Country rule notes on this page are mapped to the official tax-agency sources below.
Estimate Summary
Estimated tax
£0.00
Adjusted gain x estimated CGT rate
This is a quick estimate for one sale, not a full tax return.
What you paid
£0.00
Proceeds
£0.00
Gain or loss
£0.00
Estimated taxable gain
£0.00
How the holding period was treated: Capital gains estimate
Units sold: 1
Rate used in the estimate: 20%
Preset: UK higher/additional-rate style estimate
Days held: Not enough date data
Country rule snapshot
Tax treatment: HMRC generally treats gains on disposals of cryptoassets by individuals as subject to Capital Gains Tax unless income treatment applies first.
Holding rule: This v1 estimator does not change the tax formula based on holding period for UK disposals.
Cost basis model: This v1 tool uses a simple single-lot cost basis. It does not model HMRC section 104 pooling, same-day rules, or bed-and-breakfast matching.
How to use this calculator
- 1. Enter how many coins you sold and your buy and sell price per coin.
- 2. Use a simple preset if you want a rough CGT-style estimate, or switch to custom if you know your own rate.
- 3. Add any manual annual allowance or adjustment only if you want to reduce the taxable gain estimate.
- 4. Open advanced options if you need to include buy or sell fees in the disposal.
- 5. Review the result against HMRC guidance, especially if section 104 pooling or matching rules may apply.
Best for a quick single-disposal estimate, not a full HMRC capital gains calculation.
Key assumptions in this v1
- Designed for estimation, not for filing.
- Does not automate section 104 pooling or special matching rules.
- Does not cover income-tax treatment for receipts, employment rewards, or business activity.
Official sources and recordkeeping
Last reviewed on June 12, 2026. Readers should verify current thresholds, rates, elections, and country-specific exceptions before relying on an estimate.
- HMRC cryptoassets collection
- HMRC: Check if you need to pay tax when you sell cryptoassets
- HMRC Cryptoassets Manual
Keep records for
- Dates of acquisition and disposal
- Number of tokens disposed
- Sterling value of acquisition and disposal
- Fees and transaction costs