How to Calculate UK Capital Gains Tax on Overseas Property (2026)

If you live in the UK and you are thinking about selling a property overseas, the first question is almost always the same: do I have to pay UK capital gains tax on it? The short answer is yes, usually. As a UK tax resident you owe UK Capital Gains Tax (CGT) on the profit from selling an overseas property, regardless of whether the property country also taxes the sale. What most guides miss is that the calculation is not the same one a UK seller does at home. The gain HMRC taxes is measured in pounds sterling, converted at the exchange rates on the dates you bought and sold, which means a foreign-currency property can hand you a taxable UK gain even when its price barely moved in euros.

For a UK resident selling property in Spain, Portugal or France, the taxable gain is calculated in sterling, not in the local currency. You convert the purchase price into GBP at the rate on the day you bought and the sale price into GBP at the rate on the day you sold. Because the pound has swung against the euro since the Brexit vote, a property that broke even in euros can still produce a taxable gain in pounds, and a property that gained in euros can show a larger or smaller gain once it is in sterling. This currency mechanic, set out in HMRC’s capital gains manual at CG78310, is the single most expensive thing UK overseas sellers get wrong.

This guide covers how the calculation works for a UK resident selling abroad: the rates, the allowance, the sterling conversion, the worked numbers, the HMRC reporting route, and how the double-taxation treaties with Spain, Portugal, France and the UAE change the final bill. It is written for the buyer planning ahead, because the country, the joint or sole ownership, and the mortgage size decided at purchase all change the eventual CGT bill.

Key Facts at a Glance

• UK CGT applies to overseas property if you are a UK tax resident, on a worldwide (arising) basis. Bringing the money into the UK or leaving it abroad makes no difference. (HMRC, capital gains on foreign assets)
• Residential property rates are 18% (basic-rate band) and 24% (higher and additional band). The 24% higher rate has applied since 6 April 2024, following the Spring Budget 2024. (gov.uk CGT rates)
• The Annual Exempt Amount is £3,000 per person for 2024/25 and 2025/26, or £6,000 for a jointly owned property. (gov.uk, reducing the AEA)
• The gain is calculated in sterling, with each amount converted at the exchange rate on its own transaction date (CG78310). A purely currency-driven gain is still taxable (CG78408).
• The 60-day reporting rule does not apply to overseas property. Overseas disposals go through Self Assessment, with the standard 31 January deadline.
• Foreign Tax Credit Relief is the lower of the UK tax due on the gain or the foreign tax actually paid on the same gain. It rarely wipes the UK bill to zero. (HMRC Helpsheet HS263)
• Private Residence Relief can apply to an overseas home only if it was genuinely your only or main residence for some of your ownership, which is rare for a buyer who already has a UK home. (HMRC Helpsheet HS283)

Reddit reality check: “I am just now selling at a loss overseas property I bought 16 years ago. I expect to pay £35k in CGT due to the Brexit collapse of Sterling, and even though I had a 70% mortgage.” (r/UKPersonalFinance). The loss was in euros. The gain was in pounds. That is the whole problem in one sentence.

Do You Pay Capital Gains Tax on Overseas Property?

Yes. If you are UK tax resident, you owe UK CGT on the profit when you sell an overseas property, whether the property is in Spain, Portugal, France, the UAE, or anywhere else. The UK taxes residents on worldwide gains on the arising basis, so the gain is taxable in the year you dispose of the property, not the year you bring the proceeds home.

The two factors that decide your liability are your residence status and the size of the gain. Residence is set by the Statutory Residence Test. If you spend most of the year in the UK and your home is here, you are almost certainly UK resident and within scope. The gain is your sterling profit after the annual allowance, taxed at 18% or 24% depending on where it sits on top of your income.

Reddit reality check: “The default is the UK taxes residents on worldwide income and gains, so bringing or not bringing the money into the country is irrelevant.” (r/UKPersonalFinance). This holds for an established UK resident on the arising basis.

If you are reading this before you have bought, you are ahead of most foreign buyers, who only think about CGT when they are about to sell. The country, the joint-or-sole ownership, and the financing decided at purchase all change the eventual bill, which is where a non-resident mortgage pre-approval does its work.

What Counts as a Taxable Gain on Overseas Property?

Your taxable gain is the sale proceeds minus the acquisition cost, minus the costs of buying and selling, minus any capital improvements. HMRC sets this out in its guidance on working out your gain. What you can deduct matters, because it is the difference between a clean gain and an inflated one.

Allowable deductions include:

• Acquisition costs: the purchase price plus the transfer taxes and legal fees you paid to buy. For a Spanish property this includes the ITP transfer tax, for Portugal the IMT, and for France the frais de notaire. These are the same purchase costs covered in our Spain property cost breakdown. HMRC does not name foreign transfer taxes explicitly, but they fall under “costs of transfer or conveyance” in the same way UK Stamp Duty does.
• Capital improvements: a new kitchen, an extension, a pool. Genuine improvements that add value, not routine repairs or decoration.
• Disposal costs: estate agent fees, legal fees, and survey costs on the sale.

What you cannot deduct: mortgage interest, and routine maintenance or decoration. The fact that you borrowed 70% to buy does not reduce the gain, which is the trap the Reddit seller above fell into.

What Are the UK CGT Rates on Overseas Property in 2026?

For residential property, the rate is 18% on the part of the gain that falls within your remaining basic-rate Income Tax band, and 24% on the part above it. These are the same rates that apply to a UK property sale.

The 24% higher rate has applied to residential property since 6 April 2024, when the Spring Budget 2024 cut it from 28% to 24%. This is the point most competitor guides get wrong: the Autumn Budget of 30 October 2024 left residential rates unchanged at 18% and 24%, and instead raised the rates on other assets (shares, non-residential gains) from 10% and 20% to 18% and 24%. If you read elsewhere that residential rates “changed on 30 October 2024,” that is incorrect for residential property. The change you care about happened in April 2024. The current rates are set out on gov.uk’s CGT rates page.

The Annual Exempt Amount is £3,000 per individual for 2024/25 and 2025/26, down from £6,000 in 2023/24 and £12,300 in 2022/23. A jointly owned property gives each owner their own £3,000, so a couple shields £6,000 of gain before any tax is due.

How Does Currency Conversion Affect Your CGT?

This is where overseas CGT diverges from a domestic sale, and where the biggest mistakes happen. HMRC assesses your gain in pounds sterling, not in the currency of the property country. You convert the purchase price into GBP at the exchange rate on the day you bought, and the sale price into GBP at the rate on the day you sold. Each amount uses the rate of its own transaction date, not an annual average. HMRC accepts either the spot rate on the day or its monthly average exchange rates, applied consistently.

The consequence: a currency move can create a taxable UK gain even when the property barely appreciated. Consider a property bought and sold for the same euro price:

The property did not gain a cent in euros. In sterling it produced a £25,000 gain, taxable in the UK. HMRC’s manual confirms this at CG78408: a foreign-currency asset can produce a chargeable gain attributable purely to exchange-rate movement. This is the cross-border dynamic almost no general CGT guide explains clearly, and it is why the GBP-equivalent return matters at purchase, not just at sale.

Reddit reality check: “Convert the purchase cost to GBP using the FX rate on the date acquired. Convert the sale to GBP using the FX on the date sold. It is NOT (purchase minus sale in local currency) converted to GBP. That can make a difference.” (r/UKPersonalFinance).

Most UK buyers do not account for this when sizing their mortgage or planning the hold. If you are weighing a purchase in euros, the eventual sterling outcome is part of the picture from day one. Sizing the deposit and the loan with the currency exposure in mind is part of what a non-resident mortgage analysis should surface before you commit.

How Do You Calculate CGT on Overseas Property, Step by Step?

Here is the method for a UK resident selling a villa in Alicante, Spain, in 2025. Convert each amount to sterling at the rate on its own transaction date.

1. Allowable cost. Purchase €180,000 (2018, at 0.88) = £158,400, plus ITP and legal fees €18,000 = £15,840, plus a €15,000 renovation (2020, at 0.90) = £13,500. Total £187,740.
2. Net proceeds. Sale €280,000 (2025, at 0.84) = £235,200, minus agent and legal fees €12,000 = £10,080. Net £225,120.
3. Gross gain. £225,120 minus £187,740 = £37,380.
4. Taxable gain. £37,380 minus the £3,000 allowance = £34,380.
5. UK tax. A higher-rate taxpayer pays 24%: £34,380 x 24% = £8,251 before relief.
6. Foreign Tax Credit Relief. Spain charges 19% IRNR on its version of the gain. The credit is the lower of the Spanish tax paid or the UK tax due, which reduces, and sometimes eliminates, the £8,251.

The order matters: convert each line at its own date, deduct the allowance, apply the rate, then credit foreign tax. That is the sequence HMRC expects on the Self Assessment foreign pages.

How Do You Report Overseas Property Gains to HMRC?

Through Self Assessment, not the 60-day service. This is the single most common confusion, and even some accountant blogs get it wrong. The 60-day reporting and payment rule applies only to UK residential property. An overseas disposal is reported on your Self Assessment tax return for the year of the sale, with the standard payment deadline of 31 January after the end of that tax year.

You use two pages:

• SA108 (Capital Gains Summary) computes the gain, including the foreign gain.
• SA106 (Foreign) is where you claim Foreign Tax Credit Relief for the tax paid in the property country.

The SA108 computes the gain; the SA106 claims the relief. They work together, and missing the SA106 means you pay UK tax with no credit for what you already paid abroad.

Reddit reality check: “I’ve contacted an accountant and a tax specialist and surprisingly both said it was outside their technical remit.” (r/UKPersonalFinance). Cross-border CGT sits in a gap. Many UK high-street accountants decline it, and the cross-border filing is exactly the part buyers struggle to get advice on.

What Reliefs and Exemptions Can Reduce Your CGT?

Four reliefs are worth knowing about.

The Annual Exempt Amount. £3,000 per person, automatically applied. A jointly owned property doubles it to £6,000.

Foreign Tax Credit Relief. If the property country taxed the gain, you can credit that foreign tax against your UK CGT, up to the lower of the two amounts. If the foreign rate is higher than the UK rate, the excess is lost and cannot be set against other gains. HMRC explains the mechanics in Helpsheet HS263.

Private Residence Relief (PRR). PRR exempts the proportion of your ownership during which the property was genuinely your only or main residence. For an overseas home, since 6 April 2015 you must meet a 90-day occupancy test in each relevant tax year, you can only have one main residence at a time, and a nomination must be made within two years. For a UK buyer who keeps a home in Britain, the overseas property rarely qualifies. Details are in Helpsheet HS283.

Capital losses and spousal transfer. Losses on other assets can be offset against the gain. Transferring a share to a spouse before sale is on a no-gain-no-loss basis and brings a second £3,000 allowance and a second basic-rate band into play. That is a decision made before the sale, not after.

Reddit reality check: “declare the whole gain to the UK then claim foreign tax credit in your Self Assessment, calculated on the exchange rate on the day of the sale.” (r/UKPersonalFinance).

How Does Double Taxation Work With Spain, Portugal, France and the UAE?

The property country usually has the first right to tax the sale, and the UK gives you a credit for what you paid there. The local rate is what determines whether your UK bill is reduced or fully wiped.

Two updates matter. First, the UK-Portugal treaty is the 2025 Convention, which entered into force on 29 December 2025 and takes effect for UK Capital Gains Tax from 6 April 2026, replacing the long-standing 1968 convention. If you are using older guidance that still cites the 1968 treaty, check the current text. Second, France is the case where the credit often does not cover the full foreign bill. France charges 19% income tax plus social charges (prélèvements sociaux), an all-in rate for a UK seller around 26.5%, higher than the UK’s 24%, so the credit caps at the UK figure and the excess French tax is lost.

Buyer nationality changes the answer too. A US citizen selling French property faces a materially higher all-in rate than a UK seller: US persons carry the full French social charges plus US tax, pushing the French plus-value cost toward 37.6% from 2026, versus roughly 26.5% for a UK resident. The holder’s tax residence changes the exit cost before the property is even bought.

The treaty differences are one reason the country decision is not only about price and lifestyle. For UK buyers weighing Spain against Portugal, the guide to buying property in Spain as a UK citizen covers the purchase side, while whether to use a mortgage broker or a bank directly and how Spanish lenders assess you when you have no local credit history shape the financing side. The CGT exit is the third leg.

Comparing countries before you commit? The CGT treatment, mortgage availability and deposit requirements differ across Spain, Portugal and France. A Finance Passport pre-approval shows which lenders will work with your profile in each market, so you can weigh the all-in cost before you choose where to buy.

How Does HMRC Know About Foreign Property?

Through automatic information exchange. The UK is part of the Common Reporting Standard (CRS), under which more than 100 countries share financial account data with HMRC every year. The bank account that received your sale proceeds, the foreign tax authority’s records under the treaty network, and any income on the foreign pages of your own return all reach HMRC. The safe assumption is that HMRC already knows or can find out, and that non-disclosure carries penalties on top of the tax. Declaring the gain on Self Assessment is not optional, and the cost of getting caught is far higher than the tax itself.

What Happens If You Move Abroad Before Selling?

The temporary non-residence rule is the trap. If you leave the UK, sell the property while non-resident, and return within five complete tax years, the gain is treated as arising in the year you return and becomes taxable in the UK. The rule only releases you if you stay non-resident for more than five tax years.

This matters most for buyers who relocate for work, for example a UK national taking a posting in Dubai. Selling during a short overseas stint and returning within five tax years pulls the gain back into UK tax, even though no UK CGT applied while you were away. The timing of the sale relative to your return decides the bill.

Has Anything Changed About Bringing the Money to the UK?

For an established UK resident, nothing has changed in a way that matters. If you are UK domiciled and resident, you are taxed on the gain when it arises, on Self Assessment, regardless of whether you bring the proceeds home. There is no second tax on transferring the money into a UK account; the CGT is settled on the return, and the transfer is just moving your own already-taxed money.

The remittance basis that let non-domiciled residents defer tax on offshore gains was abolished from 6 April 2025 and replaced by the four-year Foreign Income and Gains (FIG) regime. For the typical UK seller who has always lived and been taxed here, this changes nothing; it only affects recent arrivals who qualify for the FIG window.

How Does Upscore Help UK Buyers Before, During and After the Sale?

Upscore does not file your tax return. What we do is make sure the structure you set up at purchase does not bite you at sale time, because the CGT exit is shaped years earlier, at three points.

Before buying, the country, joint versus sole ownership, the mortgage size and the deposit structure all feed into the eventual bill. A non-resident mortgage pre-approval surfaces the financing and the trade-offs across Spain, Portugal and other markets before you commit. During the hold, the sterling value of your gain moves with the exchange rate, not just the property price, so watching the GBP-EUR position is part of planning the exit. Before the sale, the lessons from the first purchase carry into the next one, and we hand off to a UK accountant for the actual filing.

In Upscore’s data, applicants who have already identified a specific property close at roughly twelve times the rate of those still exploring options. The planning that starts before you buy is the planning that pays off.

Get pre-approved once you have a property in mind. If you have shortlisted a property in Spain, Portugal or France, a Finance Passport pre-approval shows which lenders will work with your profile, and the structure it sets up is the one you will live with all the way to the eventual sale. Start your Finance Passport.

Frequently Asked Questions

How much is UK CGT on overseas property?
It is 18% on the part of the gain within your basic-rate Income Tax band and 24% above it, after deducting the £3,000 Annual Exempt Amount. The gain is calculated in pounds sterling, so the figure depends on exchange rates as well as the property price. Foreign Tax Credit Relief then reduces the UK bill by the foreign tax you paid on the same gain, up to the lower of the two amounts.

How can I avoid CGT on foreign property legally?
You cannot make the gain disappear, but you can reduce it. Hold jointly to use both £3,000 allowances, transfer a share to a spouse before sale to add a second allowance and basic-rate band, deduct all allowable purchase, improvement and sale costs, claim Foreign Tax Credit Relief for tax paid abroad, and claim Private Residence Relief if the property was ever genuinely your main home. Anything beyond this, such as not declaring, is evasion, not avoidance.

How does HMRC know about foreign property?
Through the Common Reporting Standard, under which over 100 countries share financial data with HMRC automatically. HMRC sees the account that received your sale proceeds and the foreign tax authority’s records under the treaty network, so the realistic assumption is that HMRC already knows.

Do I report an overseas sale within 60 days?
No. The 60-day rule applies only to UK residential property. An overseas sale goes on your Self Assessment return, pages SA108 and SA106, with the standard 31 January payment deadline after the tax year of the sale.

Do I pay UK CGT on a French property if I already paid French tax?
Usually yes, but with a credit. France taxes the gain at 19% plus social charges, an all-in rate around 26.5% for a UK resident. You claim Foreign Tax Credit Relief against your UK CGT, capped at the lower of the two. Because the French rate is higher than the UK’s 24%, the credit often covers the UK bill but the excess French tax is not refundable.

Does the FX gain count even if the property did not appreciate?
Yes. HMRC calculates the gain in sterling, converting purchase and sale at their respective dates. A property that broke even in euros can still show a sterling gain if the pound weakened over the hold, and that gain is taxable (HMRC CG78408).

The Bottom Line

If you are a UK tax resident, you pay UK Capital Gains Tax on the profit from selling an overseas property, calculated in pounds sterling at 18% or 24% after the £3,000 allowance, reported through Self Assessment rather than the 60-day service. The currency conversion is the part that catches people out: a property that broke even in euros can still produce a taxable sterling gain. Foreign Tax Credit Relief offsets the tax you paid in the property country, but for higher-rate countries like France it may not cover the whole UK bill. The smart move for a UK buyer is to think about the exit before the entrance, because the country, the ownership structure and the mortgage decided at purchase all shape the CGT bill at sale. If you are planning a purchase in Spain, Portugal or France, our guide to overseas mortgages for UK citizens and a Finance Passport pre-approval set up the structure you will carry through to the day you sell.

This guide is general information, not tax advice. Tax treatment depends on your individual circumstances and may change. Confirm the current position with HMRC or a qualified cross-border tax adviser before acting.