Capital Gains Tax estimate
UK Crypto Tax Calculator 2026-2027
Estimate the Capital Gains Tax on your crypto disposals in under a minute. Uses HMRC's 18% and 24% CGT rates and the £3,000 annual exempt amount. No signup, nothing stored.
How it works
How the UK crypto tax calculator works
The easiest way to calculate crypto taxes is by using a crypto tax calculator or generating a crypto tax report. Tax on cryptocurrency depends on whether you made a profit, loss, or earned income from digital assets.
If you want to save time and avoid errors, a crypto accountant or the right calculator can simplify the entire process.
The basics
What Is a Crypto Tax Calculator?
A crypto tax calculator works out the gain on each disposal: the sale proceeds minus the allowable cost of the tokens sold, including fees. In the UK, HMRC requires those costs to be calculated using share pooling (the section 104 pool), with special rules for tokens bought back on the same day or within 30 days.
Example:
- You buy Bitcoin at £20,000.
- You sell it later at £30,000.
- Your gain = £10,000.
The calculator records this as a capital gain and adds it to your tax report automatically. Most platforms integrate directly with popular exchanges and wallets like Coinbase, Binance, and MetaMask. This eliminates manual data entry and reduces human error.
Reporting
Why Do You Need a Crypto Tax Report?
A crypto tax report summarises your taxable activity for the year. HMRC requires detailed documentation of:
- Capital gains and losses.
- Income from staking, mining, or airdrops.
- Every swap, trade, or conversion.
Without a proper report, mistakes on your tax return can lead to penalties. Using a crypto tax calculator ensures accuracy and compliance while keeping an audit-ready record.
The rules
How Crypto Tax Calculation Works?
The way your crypto taxes are calculated depends on the rules in your country. In the UK:
- Disposals (selling, swapping, spending or gifting crypto) are subject to Capital Gains Tax at 18% or 24%.
- The first £3,000 of total gains each tax year is tax-free (the annual exempt amount).
- Staking, mining and some airdrops are taxed as income when received.
- Gains and income are reported on your Self Assessment return, due online by 31 January.
Formula for calculating gains:
Selling Price – Cost Basis = Capital Gain (or Loss)
Example:
- Buy 2 ETH at £1,000 each (£2,000 total).
- Sell them at £1,800 each (£3,600 total).
- Profit = £1,600 (taxable).
A crypto tax calculator applies these rules to every transaction, even complex ones like staking rewards or mining.
Doing it by hand
Can You Calculate Crypto Tax Manually?
Yes, but it’s time-consuming. To calculate manually, you need to:
- Gather all transaction history.
- Record cost basis (purchase price + fees).
- Track selling price.
- Subtract to find gain or loss.
- Apply your country’s tax rates.
For frequent traders, this becomes almost impossible without software. Even small swaps must be recorded. That’s why most people prefer using a crypto tax calculator or hiring a crypto accountant.
Choosing software
Choosing the Best Crypto Tax Calculator
Not all calculators are equal. The best crypto tax calculator should:
- Support the UK exchanges and wallets you actually use.
- Apply HMRC share pooling and the same-day and 30-day matching rules.
- Produce a capital gains summary you can copy into Self Assessment.
- Store your data securely, or not at all.
Popular Example: Koinly
Koinly integrates with 700+ exchanges and wallets. It automatically generates tax reports compliant with HMRC rules.
Read our guide on setting up Koinly in 7 simple steps.
Other alternatives include CoinTracking, TokenTax, and Accointing. Each offers different features depending on your country and trading style.
Software or specialist
Crypto Tax Calculator vs Professional Accountant
One of the most common questions is whether you should rely solely on a crypto tax calculator or hire a professional crypto accountant. The truth is, both have their place depending on your situation.
Crypto Tax Calculator
→ Ideal for casual investors, straightforward portfolios, and anyone who prefers a DIY approach. It automates the process, generates reports quickly, and works well if your trading activity is simple.
Professional Crypto Accountant
→ Best for businesses, high-value investors, and individuals with complex activities such as staking, NFTs, DeFi, or cross-border transactions. An accountant provides tailored tax advice, ensures full compliance with HMRC, and can represent you in HMRC enquiries.
In practice, many people use both: a calculator to compile the transaction data, and an accountant to review, optimise, and finalise the tax filing. This hybrid approach offers speed, accuracy, and peace of mind.
Want to dive deeper? Read our full guide on Crypto Tax Calculator vs Hiring an Accountant (Pros & Cons).
Summary
Final Thoughts
Crypto taxation doesn’t have to be overwhelming. In fact, a crypto tax calculator automates the process, while a tax report ensures compliance with authorities such as HMRC.
Furthermore, the best approach depends on your trading activity and tax requirements. Whether you’re a day trader or a long-term investor, accurate reporting is essential.
Moreover, if you need professional help, don’t rely on guesswork. Instead, contact Crypto Accountants for expert support on crypto tax reports, compliance, and strategy. Ultimately, combining automation with professional guidance ensures accuracy, compliance, and peace of mind.
Questions
FAQs
How is crypto taxed in the UK?
HMRC treats most crypto as a chargeable asset. Selling, swapping or spending it is a disposal subject to Capital Gains Tax at 18% or 24% after the £3,000 annual exempt amount. Staking, mining and some airdrops are taxed as income when received, then again under CGT when you later dispose of the tokens.
Is this crypto tax calculator accurate for my return?
It gives a reliable estimate for a single disposal or a simple year. It does not apply share pooling, same-day or 30-day matching across many trades, so active traders and DeFi users should use full transaction software or an accountant. We can prepare and file your return from your exchange data.
What counts as a disposal for crypto tax?
Selling crypto for pounds, swapping one token for another, spending crypto on goods or services, and gifting it to anyone other than your spouse or civil partner are all disposals. Moving crypto between your own wallets is not a disposal, but tax software often records it as one by mistake.
Do I need to report crypto if I made a loss?
Reporting losses is optional but usually worth it. A reported loss can be carried forward indefinitely and offset against future gains, but you must claim it within four years of the end of the tax year in which it arose. Losses reduce later gains only down to the annual exempt amount.