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UK Capital Gains Tax Calculator: Step-by-Step Guide

Calculate UK CGT manually

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1

Determine Your Gain

First, calculate the gain made from selling your asset. This is the selling price minus the original purchase price, minus any costs associated with buying and selling the asset, such as solicitor fees and estate agent fees.

2

Apply the Annual Exempt Amount

Next, subtract the Annual Exempt Amount from your gain. If your gain is less than the Annual Exempt Amount, you will not need to pay any CGT.

3

Determine Your Tax Rate

Your tax rate will depend on your income tax band. For the 2023-2024 tax year, the basic rate of 10% applies to gains made by basic-rate taxpayers, while the higher rate of 20% applies to gains made by higher-rate taxpayers. For residential property, the rates are 18% and 28% respectively.

4

Calculate Your CGT

Finally, multiply your gain (minus the Annual Exempt Amount) by your tax rate to get your CGT liability.

5

Worked Example

Let's say you sold a property for £250,000, which you originally bought for £150,000. You also paid £10,000 in solicitor fees and estate agent fees when buying and selling the property. Your gain would be £250,000 - £150,000 - £10,000 = £90,000. If you are a basic-rate taxpayer, your CGT would be (£90,000 - £12,300) x 18% = £13,806.

6

Common Mistakes to Avoid

Common mistakes to avoid when calculating your UK CGT include forgetting to subtract the Annual Exempt Amount, using the wrong tax rate, and not accounting for all costs associated with buying and selling the asset. It's also important to note that CGT rates and allowances can change, so it's always a good idea to check the latest rates and allowances before making a calculation.

Introduction to UK Capital Gains Tax

The UK Capital Gains Tax (CGT) is a tax on the profit made from selling certain assets, including property, shares, and other investments. The tax rate depends on your income tax band and the type of asset being sold. In this guide, we will walk you through the steps to calculate your UK CGT manually.

Understanding the Formula

The UK CGT formula is as follows: CGT = (Gain - Annual Exempt Amount) x Tax Rate Where:

  • Gain is the profit made from selling the asset
  • Annual Exempt Amount is the tax-free allowance, currently £12,300 for the 2023-2024 tax year
  • Tax Rate is either 10% (basic rate) or 20% (higher rate) for most assets, or 18% (basic rate) or 28% (higher rate) for residential property

Step-by-Step Calculation

To calculate your UK CGT, follow these steps:

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