Capital Gains Tax Tips for UK Residents and Non-Residents

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Selling a property in the UK can be exciting – whether you’re cashing in on an investment, offloading a second home, or dealing with an inherited house. But before you celebrate, there’s one thing you don’t want to overlook: Capital Gains Tax (CGT).

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CGT is a tax charged on the profit (or “gain”) you make when selling certain types of property. It’s not the most thrilling topic, but if you’re selling a UK property, understanding how it works could save you thousands – and stop HMRC from knocking on your door with a penalty letter.

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This guide breaks down CGT in plain English: who needs to pay, what you can deduct, the deadlines you can’t afford to miss, and some smart ways to reduce your tax bill.

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What is Capital Gains Tax on UK Property?

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Capital Gains Tax applies when you sell a property for more than you paid for it. For example, if you bought a flat for £150,000 and sold it for £250,000, you’d be taxed on the £100,000 profit – not the full sale price.

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CGT generally doesn’t apply if the property has always been your main residence, but it does apply to:

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• Buy-to-let properties

• Second homes

• Inherited properties (if you don’t live in them)

• Homes partly used for business or let out

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If you sell at a loss, the good news is you can offset that loss against future gains. HMRC even lets you carry losses forward indefinitely – but you’ll need to report them within four years if you weren’t filing a tax return that year.

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Reporting and Paying CGT: The 60-Day Rule

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If you complete the sale of a UK property on or after 27 October 2021, you have 60 days to report and pay any Capital Gains Tax due.

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Here’s how it works:

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1. Set up a CGT account via your Government Gateway login.

2. Report your gain online (or authorise your accountant to do it for you).

3. Pay within 60 days – otherwise, you risk interest charges and late penalties.

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If you’re a non-resident, you must still report the sale within 60 days even if no tax is due. Missing the deadline is a common mistake, so it’s worth looping in an accountant early in the process.

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Private Residence Relief: When You Don’t Pay CGT

If the property has been your main home for the entire period you owned it, you won’t pay CGT thanks to Private Residence Relief (PRR).

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But there are exceptions:

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• If you rented it out (fully or partially)

• If part of it was used for business purposes

• If you didn’t live there the whole time

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Even if you’ve moved out, the last nine months of ownership usually qualify for relief. However, if you bought a property purely to flip it for profit, PRR won’t apply.

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What Costs Can Reduce Your Tax Bill?

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Before you panic about a big tax bill, remember that certain expenses can be deducted from your gain:

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• Legal and estate agent fees

• Stamp Duty you paid when buying

• Renovations that added value (e.g., extensions, new bathrooms, loft conversions)

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However, routine maintenance like painting or minor repairs doesn’t count. HMRC is only interested in improvements that increase the property’s value.

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CGT for UK Residents vs Non-Residents

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1. UK Residents

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If you’re a UK tax resident and the property isn’t your main home, CGT will apply.

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2. Non-Residents

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Non-residents also have to pay CGT on UK residential property sales (rules introduced in April 2015). You can calculate the gain from the property’s market value as of 5 April 2015 instead of the original purchase price – sometimes this works out in your favour.

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CGT Rates and Allowances (2024/25)

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The rate of Capital Gains Tax depends on your income level:

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• 18% for basic-rate taxpayers

• 24% for higher-rate taxpayers

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Everyone gets a tax-free allowance of £3,000 (down from £6,000 last year). Couples who jointly own property can combine their allowances, giving you up to £6,000 tax-free.

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It’s a strict “use it or lose it” allowance – it can’t be carried forward.

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Inherited Property and Gifting

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You don’t pay CGT when you inherit property – but you will if you later sell it at a profit. Strategies to reduce tax include:

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• Selling quickly before the value rises

• Moving in and making it your main home (qualifying for PRR)

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Gifting property has its own rules. Transfers between spouses are CGT-free, but gifts to others are taxed at market value. There are also special “Gift with Reservation of Benefit” rules that prevent parents from gifting a home to children while continuing to live in it – as this can trigger both Income Tax and Inheritance Tax implications.

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Tips to Minimise Capital Gains Tax

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• Make use of your annual allowance before the end of the tax year.

• Time your sale carefully if your income is lower in certain years.

• Consider joint ownership with a spouse to double up on allowances.

• Keep detailed records of improvement costs and expenses.

• Get advice early – CGT planning works best when done ahead of a sale.

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Conclusion

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Capital Gains Tax on UK property can feel like a minefield, but with the right planning you can reduce the bill and avoid falling foul of HMRC’s strict deadlines. Whether you’re a UK resident selling a buy-to-let, a non-resident offloading a UK property, or dealing with an inherited home, the rules are complex but manageable.

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If you’re unsure, don’t guess. The penalties for late filing or misreporting aren’t worth the risk. A good accountant, us cough, can guide you through the process, ensure every allowable cost is claimed, and help you keep more of your hard-earned money.

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