Selling a property abroad after moving to the UK often feels like a win – until the tax bill lands. Many expats don’t think about Capital Gains Tax (CGT) until it’s already due, and by then it’s easy to assume the amount is fixed.
But it usually isn’t.
Every year, people who’ve relocated to the UK pay thousands more in CGT than they legally need to, simply because they don’t realise certain reliefs and exemptions still apply to their situations.
In this post, we’ll break down the CGT reliefs expats in the UK miss most often – and how to make sure you claim them.
Why So Many Expats Overpay CGT
One thing that catches people off guard is that once you’re officially a UK tax resident, HMRC usually wants a slice of any property or business asset you sell – no matter where in the world it is.
You pay UK Capital Gains Tax when you sell (or dispose of) overseas property or assets while you’re a UK resident, just as you would if the sale happened in the UK.
Many expats sell a former home or overseas investment assuming only local laws apply…only to discover a secondary tax bill waiting for them in the UK.
The main risk is over-reporting. When you’re dealing with new rules and deadlines, it’s easy to declare the full gain without realising UK tax law allows reliefs based on how you used the property before moving to the UK.
The CGT Reliefs That Help Expats Pay Capital Gains Tax
Once you’ve moved to the UK, selling property overseas doesn’t automatically mean a huge CGT charge. UK tax rules include several reliefs designed to reflect how the property was used and when you became a UK resident.
The problem is, most expats don’t realise these apply, and HMRC won’t apply them for you.
Here are the key CGT reliefs that expats living in the UK most often miss.
Private Residence Relief (PRR)
You usually won’t pay CGT when you sell (or dispose of) your home if all of the following are true:
- It’s your only home and you’ve lived in it as your main residence for the entire time you’ve owned it
- You haven’t rented out part of it (having a lodger doesn’t count)
- You haven’t used part of the home solely for business purposes (occasional home working is fine)
- The total land (including buildings!) is under 5,000 square metres (just over an acre)
- You didn’t buy the property purely to make a profit
When these conditions are met, you automatically qualify for Private Residence Relief (PRR) and pay no CGT.
If one or more of these don’t apply, you may still get partial relief, but some tax could be due.
For example:
Let’s say you owned a property overseas for 12 years in total. You lived in it as your only or main home for 8 years. You then moved to the UK, rented it out for 4 years, and later sold it.
Because the property was your main home for two-thirds of the time you owned it, around two-thirds of the total gain can usually be exempt from CGT under PPR (before applying other reliefs).
So if your total gain was £120,000, roughly £80,000 could be tax-free – leaving CGT due only on the remaining £40,000 (before allowances and other exemptions).
Final Period Exemption
This is a special bonus rule within PRR. HMRC treats the last 9 months of your ownership as “lived-in” time, regardless of whether it was rented or empty. This extra time means more of your profit can be tax-free under Private Residence Relief.
Note: This period is extended to 36 months in certain circumstances -for example, when a person is a long-term resident in a care home.
This can be especially helpful if:
- You struggled to sell right away after relocating
- The property sat empty or was briefly rented
Annual CGT Allowance
Every UK taxpayer gets a tax-free CGT allowance, which is set by HMRC each tax year. This is the amount of profit you can make before any CGT is due. For the 2025-26 and 2026-27 tax years the CGT-free allowance is £3,000 and £1,500 for trusts.
Once you’re a UK tax resident, this allowance applies even when you’re selling property or other foreign assets overseas. In practice, that means the first part of your gain is completely tax-free, with CGT only charged on what’s left above the allowance.
Foreign Tax Credit Relief (FTCR)
This is the most important protection for expats. If you sell a property abroad, the country where the house is located will likely want to tax you. Without this relief, you’d be taxed twice on the same profit (once there and once here).
- The Rule: You subtract the tax you paid abroad from your UK tax bill.
- The Benefit: You only ever pay the higher of the two tax rates, rather than both combined.
The FIG Regime
As of April 2025, the UK introduced a massive new incentive for people moving to the UK.
- The Rule: If you’ve been non-UK resident for the previous 10 years, you can claim the Foreign Income and Gains (FIG) regime for your first 4 years of UK residency.
- The Benefit: Under this regime, you can sell your foreign property and pay zero UK tax on it, even if you bring the money into the UK. It’s a total get-out-of-jail-free card for new arrivals.
Expert CGT Support for Expats Moving to the UK
The Expat Taxes team specialises in helping people who’ve moved to the UK navigate Capital Gains Tax on overseas property.
We take the time to understand your individual situation and explain exactly which reliefs you qualify for, so you don’t overpay tax in the UK.
Whether you’ve already sold, are about to sell, or just want clarity before making a move, we’re here to help you get it right (and often save thousands in the process).
Get in touch with Expat Taxes UK for a personalised CGT review and expert support.
By booking a consultation, you’ll receive a£100 credit that can be applied to any future services – including UK tax return preparation – so you can start saving straight away.
DISCLAIMER: The material in this article is for general information purposes only and does not constitute legal or taxation advice. Legal, financial, investment and taxation advice should be sought before acting or refraining from acting. All information and taxation rules are subject to change without notice. Expattaxes.co.uk Limited accept no liability for any action taken based on the information in this article or any of the articles on this website.
