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The Basics of Capital Gains Tax

Understanding the basics of capital gains tax (CGT) is paramount for individuals and investors in the UK. Whether you’re selling shares, property, cryptocurrency, or other valuable assets, CGT can significantly impact your financial decisions. In this blog post, we’ll explore the basics of CGT, including what it entails, how it’s calculated, and essential considerations for managing your tax obligations effectively within the UK.

Understanding Capital Gains Tax:

Capital gains tax is a tax levied on the profit gained from selling or disposing of an asset that has appreciated in value over time. This tax applies to a wide array of assets, including stocks, bonds, property (excluding your main residence), collectibles, and business assets. In essence, CGT is calculated on the “capital gain” – the difference between the asset’s acquisition cost (or “base cost”) and its selling price.

How is Capital Gains Tax Calculated in the UK?

Base Cost

The base cost of an asset is its original purchase price, adjusted for certain expenses such as transaction fees, legal costs, and enhancements to the asset’s value over time. This serves as the starting point for determining the capital gain.

Disposal Proceeds

The disposal proceeds refer to the amount for which the asset is sold. The capital gain is calculated by deducting the base cost from the disposal proceeds.

Annual Exemption

In the UK, individuals are entitled to an annual tax-free allowance called the Annual Exempt Amount (AEA). For the tax year 2023/24, this amount is £12,300. Capital gains up to this threshold are not subject to tax.

Tax Rates

The rate of CGT applied depends on the individual’s income tax band. For the tax year 2023/24, the rates are 10% for basic rate taxpayers and 20% for higher and additional rate taxpayers. Residential property and carried interest may have different rates.

Key Considerations for Managing CGT in the UK:

Timing of Sales

Consider the timing of asset sales to optimise tax outcomes. Holding onto assets for longer periods may qualify you for lower CGT rates, especially if you’re eligible for Entrepreneur’s Relief or Investors’ Relief.

Utilise Tax-Efficient Accounts

Take advantage of tax-efficient accounts such as Individual Savings Accounts (ISAs) and Self-Invested Personal Pensions (SIPPs) to shelter investments from CGT.

Offset Capital Gains

Offset capital gains by utilising capital losses from other investments. This strategy, known as capital gains tax-loss harvesting, can help reduce your overall tax liability.

Seek Professional Advice

Given the complexity of CGT rules and regulations, consulting with tax professionals like eAccounts is advisable. They can provide personalised guidance tailored to your specific circumstances and objectives.


Capital gains tax is a significant consideration for individuals and investors in the UK, impacting the profitability of asset transactions. By understanding how CGT is calculated, considering key factors such as annual exemptions and tax rates, and implementing effective tax planning strategies, you can minimise your tax liabilities and optimise your financial outcomes. Remember to seek professional advice to ensure compliance with HM Revenue & Customs (HMRC) regulations and maximise tax efficiency.

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