Capital Gains Tax Allowance UK 2026: What You Need to Know

Capital Gains Tax (CGT) is a tax on the profit you make when you sell or 'dispose of' an asset that has increased in value. It's not the amount of money you receive, but the gain you make that is taxed. In the UK, most personal assets are exempt from CGT, including your main home, car, and personal possessions worth £3,000 or less. However, CGT can apply to assets like second homes, buy-to-let properties, shares (outside of ISAs), and valuable antiques.

The Personal Allowance for Capital Gains Tax allows you to make a certain amount of profit each tax year before you have to pay CGT. This is often referred to as the Annual Exempt Amount (AEA). Understanding this allowance, especially as it evolves, is key to managing your tax liabilities effectively.

The Capital Gains Tax Allowance UK in Context

For many years, the Capital Gains Tax allowance remained relatively stable. However, recent government decisions have seen a significant reduction in this allowance, impacting a greater number of individuals who sell assets.

This reduction is part of broader efforts to raise tax revenue and simplify the tax system, though for many taxpayers, it means a higher tax bill on their investment gains.

Capital Gains Tax Allowance UK for 2026: The Current Outlook

As of the 2023-24 tax year, the Capital Gains Tax allowance was reduced to £6,000. For the subsequent tax year, 2024-25, it was further cut to £3,000.

Looking ahead to the 2025-26 tax year and beyond, the Capital Gains Tax allowance is currently set to remain at £3,000. While governments can change tax policy, based on current legislation and announcements, this is the figure taxpayers should plan around for that period. This represents a substantial decrease from previous years, where the allowance stood at £12,300.

This means that if you make a profit of more than £3,000 from selling assets in the 2025-26 tax year, you will likely need to pay Capital Gains Tax on the amount above this threshold. The implications of this significant reduction are far-reaching, particularly for investors, landlords, and those planning to sell valuable inherited assets.

Who Pays Capital Gains Tax?

CGT is typically paid by individuals, trustees, and personal representatives of deceased persons. You only pay CGT on your overall gains above your annual exempt amount. The tax rates that apply depend on your income tax band and the type of asset you've sold.

For most assets, higher-rate taxpayers pay 20% on gains above the allowance, and basic-rate taxpayers pay 10%. However, for residential property that isn't your main home, the rates are higher: 28% for higher-rate taxpayers and 18% for basic-rate taxpayers.

How the Reduced Allowance Impacts You

The reduction of the Capital Gains Tax allowance to £3,000 means that:

• More people will be liable for CGT: Previously, smaller gains might have fallen within the £12,300 allowance. Now, a much wider range of sales will trigger a tax liability.
• Increased record-keeping: If you're close to the allowance, careful record-keeping of acquisition costs, selling costs, and any allowable deductions becomes even more important.
• Greater need for tax planning: Proactive planning, such as using your annual allowance each year or considering how and when you dispose of assets, is critical.
• Impact on small investors: Even those with modest investment portfolios or a single buy-to-let property will find themselves needing to consider CGT more closely.

Example Scenario: Before and After Allowance Cuts

Let's consider an example of selling shares that are not held within an ISA.

As you can see, a gain that was previously tax-free would now incur a significant tax bill due to the reduced Capital Gains Tax allowance UK.

Strategies to Mitigate Capital Gains Tax

Despite the reduced allowance, there are several legitimate strategies you can employ to minimise your Capital Gains Tax liability.

1. Utilise Your Annual Exempt Amount

This is perhaps the most straightforward strategy. Each tax year, you get a new Capital Gains Tax allowance. If you have assets with unrealised gains, and it makes financial sense, you can sell a portion of them each year to use up your allowance. For example, if you have a £6,000 gain, you could sell half in one tax year and the other half in the next, spreading the gain and potentially paying no tax. This is particularly useful for assets that are easily divisible, like shares.

2. Transfer Assets to a Spouse or Civil Partner

You can transfer assets to your spouse or civil partner without incurring CGT, provided you are living together. This can be a very effective planning tool because each person has their own annual allowance. If one partner has used their allowance, or is a higher-rate taxpayer while the other is a basic-rate taxpayer, transferring assets can help reduce the overall tax burden when the asset is eventually sold. For example, if you have a £6,000 gain and your spouse has not used their allowance, you could transfer half the asset to them, and you both use your £3,000 allowance, making the full £6,000 gain tax-free.

3. Invest in ISAs

Any gains made on investments held within an Individual Savings Account (ISA) are completely free from Capital Gains Tax. This makes ISAs an extremely tax-efficient wrapper for your investments. The maximum you can invest in ISAs each tax year is £20,000. If you are regularly investing, prioritising your ISA allowance is a sensible long-term strategy.

4. Consider SEIS and EIS Investments

The Seed Enterprise Investment Scheme (SEIS) and Enterprise Investment Scheme (EIS) are government-backed schemes designed to encourage investment in small, early-stage companies. They offer generous tax reliefs, including 100% Capital Gains Tax exemption on shares held for at least three years, provided certain conditions are met. These are higher-risk investments but can be very tax-efficient for those willing to take on that risk.

5. Principal Private Residence Relief

Your main home is generally exempt from Capital Gains Tax. This is known as Principal Private Residence (PPR) Relief. If you sell your main home, you typically won't pay CGT on the profit. There are specific rules around this, especially if you've let out part of your home or used it for business, so it's important to understand the conditions.

6. Deduct Allowable Costs

When calculating your capital gain, you can deduct certain costs. These include:

• The original cost of the asset.
• Costs of improving the asset (e.g., extensions on a property).
• Costs of buying or selling the asset (e.g., stamp duty, solicitor's fees, estate agents' fees).

Keeping meticulous records of all these expenditures is vital to ensure you pay tax on the true gain.

7. Claim Capital Losses

If you sell an asset and make a loss, you can offset this loss against any capital gains you make in the same tax year, or carry it forward to future tax years. This can reduce your overall taxable gain. You must report capital losses to HMRC within four years of the end of the tax year in which you made them.

8. Use Venture Capital Trusts (VCTs)

VCTs invest in smaller, unlisted companies. They offer 30% income tax relief on new shares subscribed, and capital gains on VCT shares are exempt from CGT, provided they are held for at least five years. Like SEIS/EIS, these are higher-risk investments.

Reporting Capital Gains Tax

If your total capital gains (before deducting any losses or the allowance) exceed four times the annual exempt amount (i.e., £12,000 for 2025-26), or if your total taxable gains after any deductions exceed your annual exempt amount, you must report them to HMRC.

For residential property sales, you typically have a 60-day deadline to report and pay the CGT after the completion of the sale. For other assets, you usually report through your Self Assessment tax return. Missing these deadlines can result in penalties and interest.

Potential Future Changes to Capital Gains Tax

While the Capital Gains Tax allowance UK is currently set at £3,000 for 2025-26, government tax policy is always subject to change.

There have been ongoing discussions and reviews about Capital Gains Tax in the past, including recommendations to align CGT rates more closely with income tax rates. While no immediate changes to rates have been announced alongside the allowance reductions, it is a policy area that draws regular attention.

It is always wise to stay updated with official government announcements and seek professional advice for complex financial situations. The landscape of taxation can shift, and planning based on the most current information is crucial.

Key Takeaways

• The Capital Gains Tax allowance UK is set at £3,000 for the 2025-26 tax year and beyond, a significant reduction from previous years.
• This lower allowance means more individuals will likely pay CGT on asset sales.
• Strategic financial planning, including using annual allowances, transferring assets to a spouse, or utilising ISA allowances, is crucial.
• Keep meticulous records of asset purchases, sales, and any associated costs to accurately calculate your gains and liabilities.
• Seek professional tax advice for complex scenarios or if you have substantial gains to manage.

By understanding the current rules and planning effectively, you can navigate the Capital Gains Tax landscape in the UK and minimise your tax burden on investment gains.