Last Updated on 9th November 2026
British expats who relocate to Spain often retain UK-based property assets and later decide to sell. The complexity is that, depending on your circumstances, this could involve tax obligations in both jurisdictions, because Spanish tax residents will normally need to declare gains in Spain, but the UK tax office may also impose a tax charge.
While the UK-Spain double tax treaty does provide mechanisms that aim to prevent the same gain being taxed twice in full, it doesn’t automatically remove any reporting requirement in either country, nor does it determine the exact tax treatment of the gain in every scenario.
To help UK expats who might have retained a previous residence, a second home or a buy-to-let investment and who are now living in Spain and planning a sale, we’ve explained all you need to know about how each tax system works and, importantly, how they interact with each other.
Do Spanish Residents Pay Capital Gains Tax When Selling a UK Property?
Generally speaking, the Spanish tax authority will expect to tax residents based on their worldwide income, including capital gains. Therefore, a person considered a Spanish tax resident will typically need to report the sale of a UK-based property, even if the property itself is overseas.
Defining your tax residency may therefore be the first step, and this can be determined by several factors including:
- Spending more than 183 days in Spain during a calendar year
- Having your main centre of economic interests in Spain
- Family circumstances that establish long-term ties with Spain
Owning a home or residence permit itself doesn’t establish tax residency, and while we’ve simplified the criteria, it may be important for expats to seek advice around their residency position, or to review the more detailed guidance from the Spanish Tax Agency.
It’s also essential to remember that the tax years in the UK and Spain are different, because the Spanish tax year follows the calendar year, while the UK tax year runs from 6 April to 5 April. This can affect when a sale needs to be reported and how income and gains are assessed.
How Does UK Capital Gains Tax Affect Non-Residents Selling British-Based Property Assets?
Expats may believe that living outside of the UK removes any obligation to report or pay UK Capital Gains Tax (CGT), but this often isn’t the case. A non-resident might be liable when they sell or otherwise dispose of a UK property, including a residential home or buy-to-let asset, because the UK levies non-resident CGT.
Usually, the taxable gains are calculated by:
- Confirming the proceeds of the sale
- Deducting allowable acquisition costs
- Deducting costs of disposal and other qualifying improvement expenses
The exact calculation can become complex, depending on when the property was acquired, so this may also require financial guidance to ensure the gain being reported is accurate.
Currently, the UK residential property CGT rates are 24% for higher and additional-rate taxpayers, with an annual £3,000 exemption, although this may depend on any other gains or disposals made during the tax year.
Understanding When Private Residence Relief Might Apply
Expats selling a property they previously lived in as their main home may be eligible for Private Residence Relief (PRR), which can reduce or potentially eliminate the taxable gain, depending on the periods when the owner lived in the property.
However, this isn’t always straightforward for expats now living overseas. The length of ownership, the amount of time they lived in the property, periods when it was let out, and the rules for non-residents can all affect the available relief.
There are also specific calculation rules for some properties acquired before 6 April 2015. This might mean non-residents are able to use the property’s market value as of 5 April 2015 as the starting point for calculating the gain, although alternative methods like time apportionment may also be relevant.
How Spanish Residents Selling a UK Property Need to Report This
If you’re selling a UK property as a non-resident, you’ll usually need to report this to HMRC within 60 days, even if there isn’t likely to be any CGT payable. In some cases, you might also need to submit a UK self-assessment tax return, depending on any other reporting obligations and your overall tax position.
Note that the 60-day property disposal rule is separate from any self-assessment deadlines, and one doesn’t replace the other.
Spanish tax residents will typically also need to declare the gain through their annual Impuesto sobre la Renta de las Personas Físicas (IRPF) or personal income tax return. Obligations to declare the gain aren’t overridden because the sale occurred outside of Spain, or if the proceeds aren’t transferred to the country.
How the Sale of a UK Property Might Be Taxed in Spain
Expats living in Spain as tax residents will generally need to include the gain in the savings-income section of their IRPF return, even if they are also expected to declare this to HMRC.
The Spanish calculations might differ from those in the UK because although both systems account for acquisition and disposal values, the expenses and allowances within the Spanish rules aren’t identical, which means the same transaction might have a different taxable gain.
Currency conversions also come into play, because the original purchase price, sale value and costs will need to be converted into euros using the relevant exchange rates. Movements in those rates over the time the property has been owned can also affect the gain calculated in Spain.
Normally, capital gains arising from asset disposals are taxed within Spain’s progressive savings tax rates, which range from 19% to 30%, although it’s important to check the applicable rates and thresholds for the tax year when the property was or will be sold.
How Capital Gains Tax Is Affected By the UK-Spain Double Tax Treaty
UK expats may understandably be concerned about being taxed in both countries, and this is where understanding the double tax treaty is important. The convention contains provisions that can help prevent duplicate, full taxation. Depending on the circumstances:
- Gains made by a resident of one country from the sale of immovable property in the other will generally be taxed in the country where the property is located. That means expats selling a UK residence may be primarily taxable according to the UK system.
- If a Spanish resident owns an asset that might be taxable in the UK under the agreement, Spain may provide relief against the qualifying UK tax paid. However, this relief is limited and normally can’t exceed the calculated Spanish tax obligation.
Therefore, while the treaty is relevant, it doesn’t mean the gain is exempt from Spanish tax, or guarantee that a UK tax charge paid will cover the full liability in Spain. If, for example, the Spanish tax calculation arrives at a higher taxable gain or charge, an additional amount may remain payable in Spain.
Our advice is to consider the two tax calculations separately, and ideally before making any decisions about a property sale, and to review our earlier guide to the UK-Spain double tax treaty for more information about how this works.
How UK Expats Living in Spain Can Manage Capital Gains Tax Exposure When Selling a UK Property
As we’ve seen, there are multiple factors that might affect the CGT payable on a UK property sale when the owner now lives in Spain. They can also be impacted by the person’s individual circumstances, including their eligibility for PRR, the acquisition and improvement costs they can deduct, and how the original purchase price is assessed.
In some cases, Spanish residents may also need to look at available Spanish reliefs, because certain exemptions might be relevant in specific circumstances, such as when reinvesting the proceeds of a sale of a qualifying habitual residence when the relevant conditions are met.
However, this will all rely on detailed evaluations of each person’s tax status and overall tax position, the specifics of the property, ownership and usage, and how the tax rules in each jurisdiction apply.
How to Access Guidance on Planning a UK Property Sale From Spain
Selling a UK-based property as a Spanish tax resident can create complications because both sets of tax rules may apply to some extent, with often separate reporting requirements and different calculations that relate to the taxable gain and the allowable deductions.
Understanding these considerations, and seeking professional financial planning guidance, including specialist tax and legal advice where necessary, may be important in helping expats avoid unexpected liabilities and prepare for the declarations and tax obligations that will arise.
This may start with confirming your tax residency status, looking at the financial implications of a sale, thinking about the timings of the transaction, and analysing how this fits into other plans around retirement, investment or buying a new property.
Expats with property and other assets across borders often benefit from tailored advice to help establish how a sale might align with those plans. Those living in Spain and deciding when and how to sell a UK property are welcome to contact our cross-border financial planning team to arrange a consultation.
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Chase Buchanan Ltd is authorised and regulated by the Cyprus Securities and Exchange Commission with CIF Licence 287/15 and offers its services in the EU on a cross-border basis as per the provisions of MiFID.
Chase Buchanan Insurance Services, Agents & Advisors is authorised and regulated by the Cyprus Insurance Companies Control Service with License No 6883 and offers services in the EU on a cross-border basis as per the provisions of the Insurance Distribution Directive (IDD).
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*Information correct as at November 2026
