Crypto Tax Calculator for UK Investors

Calculate your crypto taxes in minutes with KoinX's free tax calculator.

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Estimated 2025-26 Tax Summary

Disclaimer

The results provided by this tool are for estimation purposes only. They do not account for state-level taxes, deductions, tax credits, or other factors that may affect your final tax liability with HMRC. For complete and personalized advice, please consult a professional tax advisor or please generate a full tax report here.

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What this estimate covers

What This Calculator Computes vs What a Complete KoinX Report Covers

This calculator

What does the calculator cover?

  • CGT estimate on the disposals you enter, using current HMRC rates
  • Quick view after the £3,000 annual exempt amount
  • Does not apply share pooling or same-day / 30-day matching across a full year
Full KoinX report

What does a complete KoinX tax report cover?

  • Every disposal and income event across connected accounts
  • Section 104 pooling with same-day and 30-day matching
  • Figures ready for SA108 (gains) and SA100 (income)
  • Record-keeping support if HMRC opens a compliance check

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SA108 / SA100 figures

UK Crypto Tax — 2026/27

How Crypto is Taxed in the United Kingdom

HMRC treats cryptoassets as property. CGT rates below apply from 30 October 2024.

CGT basic rate

18% on crypto gains in the basic-rate band

CGT higher / additional rate

24% on crypto gains above the basic-rate band

Annual exempt amount

£3,000 CGT allowance per tax year

Income events

Staking, mining, and some airdrops taxed as income

Matching rules

Same-day, 30-day (bed and breakfast), then Section 104 pool

Where to report

SA108 for capital gains; SA100 for crypto income

Online filing deadline

31 January following the tax year

Losses

Capital losses offset gains; unused losses can be carried forward

Transaction TypeTax TreatmentRateReturnLoss offset?
Sell crypto for GBPCGT disposal18% or 24%SA108Yes
Crypto-to-crypto swapCGT disposal of the asset given up18% or 24%SA108Yes
Spend cryptoCGT disposal at market value18% or 24%SA108Yes
Staking / mining rewardsIncome (then CGT on later disposal)Income tax bandsSA100N/A
Crypto as salaryEmployment income at GBP value on receiptIncome tax + NICsPAYE / SA100N/A

Worked Example

How the calculation works — step by step

You bought Ethereum for £10,000 and sold it for £16,000. You are a basic-rate taxpayer and have not used your CGT allowance on other assets.

This covers a single disposal. Share pooling, same-day and 30-day matching, and other income can change the figure you report to HMRC.

How it works:

  1. Disposal proceeds minus allowable cost is the gain.
  2. Subtract any remaining annual exempt amount (£3,000).
  3. Tax the remainder at 18% (basic rate) or 24% (higher / additional rate).
  4. Report the gain on SA108. Report staking or mining income on SA100.
Disposal proceeds
£16,000
Less: allowable cost
− £10,000
Chargeable gain
£6,000
Less: annual exempt amount
− £3,000
Gain after allowance
£3,000
CGT at 18%
£540

A higher-rate taxpayer would pay 24% on the same £3,000, which is £720. Unused losses can reduce this further.

Go Deeper

More for UK Crypto Investors

Guides for HMRC rules, Self Assessment, and late-filing penalties.

Tax Guide

Crypto Tax in the UK: The Ultimate Guide

CGT, income, share pooling, and which boxes to complete on your return.

Read
Filing Guide

How to Report Crypto to HMRC

SA100, SA108, the 31 January deadline, and required records.

Read
Penalties

HMRC fines for late crypto tax filing

Automatic penalties, daily charges, and how to correct a missed return.

Read
Software

UK crypto tax software

Sync wallets and exchanges, then export HMRC-ready calculations.

Read

Frequently Asked Questions

Do I have to pay taxes on my cryptocurrency transactions in the UK?

Yes, you must pay taxes on certain cryptocurrency transactions in the UK. If you make money by selling cryptocurrencies, you may owe Capital Gains Tax. Alternatively, if you get paid in cryptocurrencies or earn them through mining, you might have to pay Income Tax. To simplify tax calculations, consider using a free crypto tax calculator for the UK.

Do I have to pay tax on crypto-to-crypto transactions?

In the UK, trading one cryptocurrency for another, like Bitcoin for Ether, is considered taxable, and you may have to pay Capital Gains Tax. When you trade, it's seen as if you're selling your cryptocurrency, which is a taxable event. They don't pay attention to what you're buying with it, just that you're getting rid of one asset. So, if you make a profit, you'll owe Capital Gains Tax. In simple terms, buying, swapping, and trading cryptocurrencies with each other can be subject to tax in the UK.

Discover the convenience of KoinX's UK crypto tax calculator. Calculate your cryptocurrency taxes effortlessly with our historical price engine, providing accurate, fair market values for your transactions. Simplify your tax assessment process with us.

How do I lower my cryptocurrency taxes?

Here are a few strategies you can employ to reduce cryptocurrency tax in the UK:

• Take advantage of trading and property tax breaks.

• Harvest losses to offset gains.

• Make crypto donations for potential tax deductions.

• Explore EIS and SITR investments for tax incentives.

• Invest in a cryptocurrency pension fund.

• Utilise tax-free thresholds.

• Transfer crypto as a gift to a spouse for CGT exemptions.

• Identify unrealised losses with KoinX or similar tools.

What types of cryptocurrency transactions are not subject to taxes in the UK?

In the UK, not all crypto transactions are taxable. For example, holding or transferring your crypto assets between your own wallets, buying crypto from fiat, donating to charity, or gifting crypto to your spouse or civil partner does not trigger a taxable event. Furthermore, each tax year, there is a tax-free allowance known as the Annual Exempt Amount. To navigate these tax rules and accurately calculate your obligations, consider using a crypto tax calculator in the UK. 

Can the HMRC track my cryptocurrency?

Yes, HMRC can indeed track cryptocurrency transactions.

They do this by:

1. Asking all the UK cryptocurrency exchanges to share data.

2. Holding records of cryptocurrency transactions dating back to 2014.

3. Keeping up with the Know Your Customer (KYC) information you provided when signing up for any UK-based cryptocurrency exchange or wallet.

In recent years, HMRC has been actively working to prevent cryptocurrency tax evasion. They have acquired customer data from major exchanges and sent letters to crypto investors to remind them about paying capital gains and income tax.

Are there any tools that support multiple blockchain networks for crypto tax calculations in the UK?

Certainly! When it comes to handling crypto taxes in the UK, it's wise to use a versatile crypto tax calculator like KoinX. KoinX is designed to support multiple blockchain networks, making it a reliable choice for calculating taxes on various crypto transactions. This tool can help you assess your tax obligations accurately, considering the complexities of different blockchain networks and the ever-evolving cryptocurrency landscape. 

Is using a crypto tax calculator safe?

KoinX provides a reliable cryptocurrency tax UK calculator that can assist you in determining your tax obligations for cryptocurrency transactions. This tool accurately tracks your portfolio on your preferred exchange and computes your gains or losses based on the crypto amounts and prices involved.

Which exchanges do you support?

KoinX seamlessly integrates with a wide array of exchanges, including Binance, Coinbase, OKX, Gate.io, CEX.io, Kraken, and numerous others. It effortlessly consolidates cryptocurrency transactions from over 270+ chains, exchanges, and wallets, presenting them in a user-friendly unified dashboard.

Do I have to pay tax if I transfer crypto from one wallet to another?

Moving cryptocurrency between your personal crypto wallets or exchanges doesn't incur a tax liability. According to HMRC, such transfers are not considered disposals, and therefore, you won't be subject to Capital Gains Tax for these transactions. Nevertheless, it's essential to keep detailed records of these transfers, particularly if you are utilising automated crypto tax software like KoinX.

How do I use a cryptocurrency tax calculator?

In order to use a crypto tax UK calculator, you need to input information about your cryptocurrency transactions.

After you enter your information, the cryptocurrency tax calculator will calculate the gain or loss on every transaction.

This includes:

1. The financial year you want to calculate your taxes for.

2. The country you want to calculate your taxes for.

3. The purchase price of the coin.

4. The sale price of the coin.

You will get results that mention the following:

1. The total profit/loss you made

2. The tax you’re liable to payIn order to use a crypto tax UK calculator, you need to input information about your cryptocurrency transactions. After you enter your information, the cryptocurrency tax calculator will calculate the gain or loss on every transaction.

How do I calculate capital gains tax on my crypto investments in the UK?

Moving cryptocurrency between your personal crypto wallets or exchanges doesn't incur a tax liability. According to HMRC, such transfers are not considered disposals, and therefore, you won't be subject to Capital Gains Tax for these transactions. Nevertheless, it's essential to keep detailed records of these transfers, particularly if you are utilising automated crypto tax software like KoinX.

How do I calculate capital gains tax on my crypto investments in the UK?

Calculating taxes on your cryptocurrency gains in the UK is a step-by-step process. First, you need to figure out your cost basis, which is how much you initially spent to buy the cryptocurrency plus any extra fees you paid along the way. This can be calculated using a simple formula:

Cost Basis = Initial Purchase Price + Transaction Fees (if any).

Next, you determine how much you made from your crypto, whether by selling, trading, spending, or giving it away. The profit you've earned can be calculated using this formula:

Capital Gain = Disposal price – Cost basis

Now, here's where your overall income comes into play. The amount of tax you'll pay on your cryptocurrency profit is determined by your total income. All capital gains are taxed under the same tax rates as income tax in the UK. The tax rates are based on the following income bands:

BandTaxable incomeTax Rate
Personal AllowanceUp to £12,5700%
Basic rate£12,571 to £50,27020%
Higher rate£50,271 to £125,14040%
Additional rateover £125,14045%

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