Owning property in Spain means dealing with the tax rules of two countries. In theory that could mean being taxed twice. In practice the UK-Spain double taxation treaty prevents it.
Prevents double taxation, note. It does not prevent dealing with two systems.
How the treaty works #
The UK and Spain have agreed which country may tax which income and assets. The principle is straightforward: Spain taxes income and assets located in Spain, and the UK takes account of the Spanish tax so the same thing is not taxed twice.
How it works in practice #
Rental income #
Taxed in Spain first, at 24 per cent on the gross rent for a UK owner.
You also declare it in the UK on your self assessment return, because UK residents are taxed on worldwide income. You then claim Foreign Tax Credit Relief for the Spanish tax paid.
Here is the nuance that matters. The credit is limited to the UK tax due on that same income. If your UK tax on the rental profit is higher than the Spanish tax, you pay the difference to HMRC. If it is lower, you do not get the excess back.
It also means the two calculations use different figures. Spain taxes gross rent with no deductions. The UK taxes profit after allowable expenses. So you may find UK tax is calculated on a smaller number, which reduces the credit you can use.
Assets #
The UK has no wealth tax, so Spanish wealth tax has no UK counterpart to offset. Whether you pay depends purely on the Spanish rules and allowances.
Selling the property #
Spain taxes the gain first, at 19 per cent for non-residents.
The UK also taxes the gain, because UK residents pay capital gains tax on worldwide disposals. You claim credit for the Spanish tax paid. Again, if UK CGT on the gain exceeds the Spanish tax, you pay the difference here.
Note that the two countries calculate the gain differently, particularly on which costs may be deducted and on exchange rates, so the numbers will not match.
Filing in both countries #
Even where double taxation is avoided, you generally file in both places: in Spain for your income and assets there, and in the UK for your overall position.
Good record keeping is not optional. You need the Spanish assessments and payment receipts to substantiate a UK credit claim.
Where it needs more attention #
Some situations get more complicated: letting the property, larger asset values, ownership through a company, or a sale or transfer.
The exchange rate is a running theme. Spanish tax is calculated in euros and UK tax in pounds, and which rate applies on which date is not always obvious.
Practical points #
Keep every Spanish assessment and payment receipt. Check the rules annually, because both systems change. Make sure the two returns line up. And remember the tax years do not: Spain runs the calendar year, the UK runs to 5 April.
In short #
The treaty prevents you paying twice on the same income or gain. It does not mean you only deal with one system, and it does not always mean you pay only the Spanish rate.
This is one of the more technical areas and the interaction is easy to get wrong. Have your position reviewed by an adviser familiar with both the Spanish and UK systems.
Last reviewed 2026-08-24
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