Double-Taxation Treaties Explained for Property Owners in Spain

Buying a home on the Costa del Sol while living abroad raises an immediate worry: will you be taxed twice, once in Spain and again in your own country? This is exactly what double-taxation treaties are designed to prevent. A double-taxation treaty (in Spanish, a convenio de doble imposición) is a bilateral agreement that decides which country may tax a given source of income and how the other country must give relief. Spain has signed 93 such agreements, so the great majority of foreign buyers are covered. ¹ This guide explains, in plain terms, how these treaties interact with Spanish property taxes such as the IRNR, Modelo 210, the 3% retention and capital gains tax.

Why double taxation happens for property owners in Spain

Two principles collide. Spain taxes where the property physically sits: real estate on Spanish territory is always taxable in Spain, whoever owns it and wherever they live. Your country of residence, meanwhile, usually taxes its residents on their worldwide income and gains, including anything arising from a Spanish flat or villa. Without a treaty, the same rental income or the same profit on a sale could be taxed in full in both places. Double-taxation treaties resolve this by allocating the primary right to tax to one country and obliging the other to step back or give a credit.

For immovable property the rule is consistent across almost every treaty Spain has signed, because they follow the OECD Model Convention. Income from property, and capital gains on selling it, may be taxed in the country where the property is located. For a Costa del Sol home that country is always Spain. Your home country keeps a secondary right to tax but must remove the double burden.

The Spanish taxes a treaty has to coordinate

As a non-resident owner you face three main Spanish taxes on the property itself. A treaty does not remove them; it makes sure you are not charged again at home for the same thing.

Non-resident income tax (IRNR) and Modelo 210

Non-residents pay the Impuesto sobre la Renta de no Residentes (IRNR), declared on Modelo 210. If you rent the property out, you are taxed on the rental income. If you keep it for your own use or leave it empty, Spain still charges an imputed income (a notional rent for simply owning a second home). ²³

• Imputed income base: 1.1% of the cadastral value if that value has been revised within the last ten years, or 2% if it has not. ²⁴
• Tax rate: 19% for residents of the EU, Iceland, Liechtenstein and Norway, and 24% for residents of all other countries (including the United Kingdom since Brexit). ²
• Deductions: EU/EEA residents renting out a property may deduct related expenses; residents elsewhere are taxed on the gross amount with no deductions. ²

Imputed-income returns are filed once a year, by 31 December of the year following the tax year. Rental returns are generally filed quarterly. For the mechanics of the form itself, see the related guide on Modelo 210 for non-residents.

Local property tax (IBI)

Every owner, resident or not, pays the annual Impuesto sobre Bienes Inmuebles (IBI) to the town hall. It runs from roughly 0.4% to 1.1% of the cadastral value depending on the municipality. ³ IBI is a local charge and normally falls outside treaty relief, but it is deductible against Spanish rental income for EU/EEA residents.

Capital gains and the 3% retention

When you sell, Spain taxes the gain (sale price less purchase price and allowable costs such as notary, legal fees and the transfer tax paid on acquisition) at a flat 19% for all non-residents, regardless of nationality or EU status. ⁴⁵

To guarantee collection from a seller who lives abroad, the buyer must withhold 3% of the sale price and pay it to the Agencia Tributaria on Modelo 211 within one month of completion. ⁴⁵ This 3% is not the final tax; it is a payment on account. The seller then has four months from the sale to file Modelo 210 and settle up: pay the balance if the 19% due exceeds the 3% withheld, or reclaim the difference if it does not. ⁵ Capital gains on a Spanish property are covered in more depth in the related guide on selling costs and capital gains tax.

How treaties actually remove the double charge

The key point for property is that Spain almost always taxes first, and your home country provides the relief. Treaties use one of two standard methods, set out in the agreement between Spain and your country.

• Credit method (most common): you declare the Spanish income or gain at home, but your country lets you subtract the Spanish tax already paid from its own bill on the same item. If your home rate is higher, you pay only the top-up difference; if it is lower or equal, the Spanish tax usually wipes out the home liability on that income.
• Exemption method: some treaties instead let the residence country exempt the Spanish-taxed income, sometimes keeping it in view only to set the rate on your other income (exemption with progression).

In practice this means you keep proof of the Spanish tax you paid (the stamped Modelo 210 or Modelo 211) and present it to your own tax authority. For example, a US owner claims the Spanish tax as a Foreign Tax Credit on IRS Form 1116, and because Spain’s rates on property income and gains are broadly in line with or above US rates, that credit typically eliminates the double charge entirely. ³ EU residents follow the equivalent credit rules in their national returns.

What a treaty does and does not do

Treaties are widely misunderstood, so it is worth being precise.

• They do not exempt you from Spanish tax. You still owe IRNR, IBI and capital gains in Spain. Relief happens at home, not in Spain.
• They decide residence in disputed cases. If both countries claim you as resident, the treaty’s tie-breaker rules (permanent home, centre of vital interests, habitual abode, nationality) settle which one wins.
• They cap withholding taxes on cross-border dividends, interest and royalties, though these matter more for investors than for a single holiday home.
• They do not cover every local levy. Municipal charges such as IBI or the plusvalía municipal on a sale are generally outside the treaty and are simply paid in Spain.

Practical steps for a Costa del Sol owner

1. Get your NIE and register the purchase before completion; without a NIE you cannot file any Spanish tax return. See the related guide on the NIE and buying process.
2. Check whether your country has a treaty with Spain. With 93 in force, most buyers are covered; the official Agencia Tributaria list confirms it. ¹
3. File Modelo 210 on time each year for imputed or rental income, and keep the payment receipts.
4. Declare the Spanish property at home and claim treaty relief (credit or exemption) using those receipts as evidence.
5. On a sale, confirm the buyer has paid the 3% on Modelo 211, then file your own Modelo 210 within four months to settle or reclaim.
6. Use a cross-border tax adviser. Treaty wording differs country by country, and the residence and credit rules are where mistakes (and refunds) most often arise.

The bottom line

For a foreign owner on the Costa del Sol, the sequence is reliable: Spain taxes the property first because it sits on Spanish soil, and your double-taxation treaty ensures your home country gives relief so nothing is taxed twice. Understanding that order, and keeping clean records of every Spanish tax paid, turns a source of anxiety into a straightforward piece of admin. Read alongside the related guides on Modelo 210 for non-residents, buying costs (ITP, IVA and AJD) and capital gains when selling to see the full tax picture of Costa del Sol ownership.