The Spanish tax that non-resident owners forget and why 31st December matters

Every autumn, many non-resident owners of Spanish properties receive a letter from the Agencia Tributaria, informing them they need to file Modelo 210 returns. These owners often assume that paying their IBI (Municipal Property Tax) to the town hall is enough. However, this is not the case. If you are not a Spanish tax resident – typically if you spend fewer than 183 days in the country each year and your primary economic interests lie elsewhere – you are liable to Non-Resident Income Tax. This tax applies regardless of whether the property generated any income during the year.

The Modelo 210 return is based on the cadastral value of the property, found on the IBI bill, not on the amount you paid for it or what it could sell for today. Spain taxes the perceived benefit of having a home in the country. To calculate the tax, take either 1.1% or 2% of the cadastral value, depending on whether the municipality has updated those values in the past ten years. The tax on this imputed income is 19% for EU, Norway, and Iceland residents, and 24% for everyone else, meaning British owners would pay 24%.

An example calculation: if a property has a cadastral value of 100,000 euros, and the municipality has revised those values recently, the imputed income would be 1,100 euros. The tax on this would be 209 euros for an EU resident, or 264 euros for a British owner. However, the process can get complicated. The return is personal, not per-property, so if two co-owners file separately, they would each file their own return.

If the property generates rental income, that income must be declared on a separate return. Owners in the EU and EEA can deduct expenses against the rent, but this is not permitted for owners in other countries.

The 2025 return is due by December 31, 2026, so owners have until then to file. The tax office cross-checks land registry and cadastral records with the returns filed, making it relatively easy to spot unfiled returns. Late filings incur a surcharge of 1% plus additional percentages for each month past due, reaching up to 15% plus interest after a year. Waiting for a letter to arrive is more costly, as penalties become penalties rather than surcharges.

Additionally, when a property is sold, the buyer must withhold 3% of the sale price and remit it to the Agencia Tributaria on behalf of the seller, which brings the seller’s filing record into focus at the same time. If a seller has unfiled years, they can be discovered during the notary proceedings in the week the sale is finalized.

Owners should file their returns voluntarily to avoid penalties and clear any past issues. The required documents for filing include the NIE, the cadastral reference, the cadastral value from the IBI bill, the owner’s share of the property, and the dates of purchase or sale, if applicable.

The Modelo 210 return itself is straightforward, but many owners forget its existence until they receive a letter. To avoid this, owners who have not filed in years should proactively file their returns to close the matter. Surcharges are modest compared to the potential penalties, and owners can file their returns online through the spaintax.com website.

Jon W. Olsen, an authorized tax collaborator of the Agencia Tributaria, has filed over 8,000 Modelo 210 returns since 2006 and offers this service. This information is general in nature and does not constitute personalized tax advice.