Understanding Capital Gains Tax and How It Affects Your Investments
A Guide to Efficient Tax Planning for Property and Asset Owners
Capital Gains Tax (CGT) is a crucial consideration for anyone selling assets such as property, shares, or valuable personal possessions. Understanding how CGT works can help you legally minimise your tax liability while making the most of your investments. In this guide, we will explore the key principles of CGT, exemptions, reliefs, and strategies for tax-efficient investing.

What is Capital Gains Tax?
CGT is a tax on the profit (or gain) made when selling an asset that has increased in value. The tax is applied only to the gain and not the total sale price. It is payable on assets such as:
- Investment properties
- Shares and securities
- Business assets
- Valuable possessions worth over £6,000 (excluding cars)
If you sell an asset for less than you paid, there is no CGT to pay, and in some cases, losses can be offset against future gains.
Capital Gains Tax Rates for 2024/25
The amount of CGT you pay depends on your total taxable income and the type of asset being sold. The tax rates are as follows:
- Basic Rate Taxpayers (income up to £50,270)
- 10% on standard assets
- 18% on residential property
- Higher and Additional Rate Taxpayers (income above £50,270)
- 20% on standard assets
- 24% on residential property
Business assets may qualify for Business Asset Disposal Relief (formerly Entrepreneurs’ Relief), which reduces the tax rate to 10% on gains up to £1 million.
Annual Exemptions and Allowances
Each individual has an Annual Exempt Amount, meaning that gains below this threshold are tax-free. For 2024/25, the exemption is £3,000 per individual.
If an asset is jointly owned, both owners can use their exemption, potentially doubling the tax-free allowance.
Strategies to Reduce Your CGT Liability
1. Make Use of Your Annual Exemption
If your total gains approach the exemption threshold, consider spreading disposals across different tax years to maximise tax-free allowances.
2. Transfer Assets Between Spouses
Transfers between spouses or civil partners are exempt from CGT. By doing this, couples can effectively double their exemption and optimise tax planning.
3. Invest in ISAs and Pensions
Investments held within Individual Savings Accounts (ISAs) or pensions are exempt from CGT. Maximising contributions to these accounts helps shield profits from taxation.
4. Offset Losses Against Gains
If you have made losses on asset sales, these can be offset against gains, reducing overall tax liability. Losses must be reported to HMRC within four years.
5. Consider Business Asset Disposal Relief
For business owners, Business Asset Disposal Relief (formerly Entrepreneurs’ Relief) reduces CGT to 10% on the sale of qualifying business assets up to £1 million.
6. Hold Investments for Longer
For those selling residential property, the higher rate of CGT applies. Holding onto assets until tax rules change or planning disposals carefully can help avoid unnecessary tax burdens.
When Do You Have to Pay Capital Gains Tax?
CGT on residential property sales must be reported and paid within 60 days of the sale completion. For other assets, CGT is included in your annual Self-Assessment tax return, due by 31st January following the tax year in which the gain was made.
Late payments can result in penalties and interest, so keeping track of tax obligations is essential.
CGT and Inheritance Planning
If you inherit assets, there is no immediate CGT to pay. However, if you later sell the asset and it has increased in value, CGT may apply based on the market value at the time of inheritance rather than the original purchase price.
By planning ahead and using tax reliefs, you can minimise inheritance-related CGT liabilities.
Conclusion: Take Control of Your Capital Gains Tax Planning
Understanding Capital Gains Tax can significantly impact the profitability of your investments and financial decisions. With careful planning, using allowances and reliefs, and seeking professional guidance, you can reduce CGT liabilities and ensure compliance with tax regulations.If you need expert advice on CGT, asset structuring, or tax-efficient investing, Nigel B. Butler offers tailored accounting and tax planning services to help you maximise your wealth. Contact us today to discuss your financial goals and tax-saving strategies.