UK Crypto Tax Calculator
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Used to determine your CGT tax bracket (18% or 24%).
Deductible costs (e.g., transaction fees, professional advice).
Taxes and Profit (2024/2025 Tax Year)
Your Net Crypto Gain
£19,000
Tax-Free CGT Allowance (2024/25)
– £3,000
Taxable Crypto Gain
£16,000
Capital Gains Tax to Pay
£3,120
Profit After Tax
£15,880
Understanding the Calculation Logic
How This Free UK Crypto Tax Calculator Works
Understanding how frustrating CGT calculations can be, we built this 100% free UK crypto tax calculator to help you with your capital gains estimations.
It references the official guidance of HMRC on cryptoassets and its current tax rates for the ongoing tax year.
It takes the profit you enter and subtracts the annual tax-free allowance. It then applies the correct tax rate based on your income tax band. Higher-rate taxpayers pay a different percentage on chargeable gains than basic-rate taxpayers, so the calculator accounts for this difference automatically.
This tool provides an estimate only. It does not replace formal tax calculations or personalised advice.
What Counts as a Taxable Disposal for Crypto
HMRC treats the following actions as taxable events:
- selling crypto for GBP
- swapping one token for another
- spending crypto on goods or services
- gifting crypto (except to a spouse or civil partner)
Internal transfers between wallets you own do not create a taxable disposal. HMRC guidance covers this under the general rules for exchange tokens.
When This Calculator Is Useful
This calculator helps estimate your potential crypto tax bill when:
- you traded crypto during the tax year
- you realised gains from selling or swapping assets
- you want an estimate before completing Self Assessment
- you are planning disposals and want to understand the tax impact
- you need a quick way to compare your UK crypto capital gains against current tax bands
It is ideal for forecasting and planning but not intended to replace detailed bookkeeping or formal advice.
What This Calculator Does Not Cover
To stay transparent and improve user trust, it’s important to outline limitations.
The calculator does not account for:
- 30-day matching (bed and breakfasting rules)
- same-day matching
- Section 104 cost basis calculations
- income tax on staking, mining, airdrops, or rewards
- losses carried forward from previous years
- negligible value claims
- business or corporate tax treatment
- DeFi lending, borrowing, or LP token disposals
Users with complex activity should review HMRC guidance or use dedicated tax software.
Frequently Asked Questions (FAQs)
What does this UK crypto tax calculator actually work out?
This calculator estimates how much Capital Gains Tax (CGT) you may owe on your crypto disposals for the current UK tax year. It takes your crypto profit, subtracts allowable costs and the annual CGT allowance, then applies the basic or higher CGT rate based on your other income. It focuses on capital gains from disposals, not income tax on staking, mining, or airdrops.
No. The output is an estimate based on the figures you enter and simplified HMRC rules for the 2024/25 tax year. It does not take into account every possible scenario, such as historic losses, complex transaction histories, or changing tax rules. You should treat it as a planning tool only, not as formal tax advice or a final tax calculation.
This calculator is designed for capital gains on taxable disposals, such as selling crypto for GBP, swapping one token for another, spending crypto on goods or services, or gifting crypto to someone other than a spouse or civil partner. It assumes you have already worked out your overall profit from those disposals for the tax year before entering it.
No. The calculator uses a simplified approach based on your total profit figure. It does not perform detailed cost basis calculations under HMRC’s share matching rules, including same-day matching, the 30-day “bed and breakfasting” rule, or Section 104 pooling. Those need to be calculated separately, either manually or with dedicated crypto tax software, before you enter your profit.
HMRC looks at your total taxable income for the year to decide whether your gains fall in the basic or higher CGT band. Your salary, self-employment income, rental income and other taxable income use up the basic rate band first. This calculator uses the income figure you provide to estimate how much of your crypto gain is likely to be taxed at the basic CGT rate and how much, if any, falls into the higher rate.
No. This tool only estimates Capital Gains Tax on your crypto disposals. Staking rewards, mining income, airdrops and similar receipts are usually treated as taxable income first, and may later give rise to capital gains when you dispose of the tokens. Those income tax calculations are outside the scope of this calculator and should be worked out separately.
Disclaimer: This calculator provides general estimates only based on HMRC’s published tax rules for the 2025/26 tax year. It does not account for all individual circumstances, transaction types, reliefs, or business-related activities. The results should not be taken as tax, financial, or legal advice. You should consult HMRC guidance or speak with a qualified tax professional before making decisions related to your tax obligations.
