Double Taxation Agreements and Your Spanish Property: How Treaties Protect Non-Resident Owners (2026)

A double taxation agreement (DTA) between Spain and your home country decides which state has the right to tax your Spanish rental income and your capital gain when you sell. Spain has signed 93 such treaties, each based on the OECD Model Convention, and each follows the same architecture: Article 6 gives the state where the property sits the right to tax rental income, and Article 13 does the same for capital gains from real estate. Since 1 January 2022, the OECD Multilateral Instrument (MLI) has modified many of those treaties in force, adding a Principal Purpose Test that can deny relief where tax avoidance is a main purpose. The treaty does not reduce the Spanish tax bill on the property itself; it prevents your home country from taxing the same income again, usually through a credit or exemption.

What is a double taxation agreement and how does it apply to Spanish property?

A double taxation agreement is a bilateral treaty that allocates taxing rights between two countries so the same income is not taxed twice. Spain’s DTAs follow the OECD Model Tax Convention, which uses a standard article numbering. For property owners, the two articles that matter are Article 6 (income from immovable property) and Article 13 (capital gains). Under Article 6, income from real property situated in a contracting state may be taxed in that state, meaning Spain taxes rental income from Spanish property regardless of where the owner lives. Under Article 13, gains from the alienation of real property may be taxed in the state where the property is situated. The resident state then grants relief, either as a credit against its own tax or by exempting the income, so the owner is not taxed twice on the same gain.

The Agencia Tributaria publishes an alphabetical list of every treaty Spain has signed, currently numbering 93, on its international taxation pages. Each treaty must be read individually because the relief method, the residency tie-breaker and the treatment of shares in property-rich companies vary by partner country.

How do Spain’s DTAs treat rental income from your Spanish property?

Rental income from a Spanish property is taxed in Spain first, because the property is situated in Spain and Article 6 of the OECD Model gives the source state that right. A non-resident owner pays the flat 19 per cent non-resident income tax rate (IRNR) on the net rental income, filed quarterly on Modelo 210. The DTA then tells the owner’s home country how to avoid taxing the same income again. Most Spanish treaties use the credit method, where the home state allows a deduction equal to the Spanish tax paid, capped at the tax the home state would have charged on the same income. A minority use the exemption method, where the home state simply does not tax income already taxed in Spain.

If you are a UK resident letting a Spanish property, the Spain-UK Convention of 14 March 2013 (published in the BOE on 15 May 2014) confirms that income from real estate may be taxed in both states, with the resident taxpayer entitled to apply the deduction for international double taxation in the UK. If you are a US resident, the Spain-US Convention of 22 February 1990 (general effective date 1 January 1991) gives Spain the same right to tax the rental income under Article 6, and the US allows a foreign tax credit under Article 24. For the full non-resident filing cycle, see the IRNR guide.

Income type	Treaty article	Spain’s right	Home state relief	Typical method
Rental income	Article 6	Tax in Spain (source state)	Credit or exemption	Credit (UK, US, most EU)
Capital gains (sale)	Article 13.1	Tax in Spain (where property sits)	Credit or exemption	Credit (UK, US)
Gains on property-rich shares	Article 13.4 (UK 50% / US 25%)	Tax in Spain if threshold met	Credit	Credit
Interest (no property link)	Article 11 (UK)	Only in resident state	n/a	Exemption at source

How do DTAs treat capital gains when you sell Spanish property?

When you sell a Spanish property, the gain is taxed in Spain because the property is situated there. Under Article 13.1 of the OECD Model, and under both the Spain-UK and Spain-US treaties, capital gains from the alienation of real property may be taxed in the state where the property is located. A non-resident seller pays the flat 19 per cent non-resident capital gains tax, with the buyer retaining 3 per cent of the sale price as a deposit against the tax (Modelo 211). The seller then settles the final liability or claims a refund via Modelo 210 within four months. The non-resident CGT and 3 per cent retention guide sets out that mechanism in full.

Your home country grants relief on the same gain. Under the Spain-UK treaty, the UK allows a credit for the Spanish tax paid against the UK capital gains tax liability on the same disposal. Under the Spain-US treaty, Article 24 allows the US to credit the Spanish tax paid, subject to the US foreign tax credit limitations. The US saving clause in Article 1 paragraph 3 means the US may still tax its citizens as if the convention were not in force, but Article 24 paragraph 3 deems the income to arise in Spain to the extent necessary to avoid double taxation, so a US citizen can still claim relief.

One detail that catches property-rich share sales: under the Spain-UK treaty, Article 13.4 taxes gains from shares whose value is derived by more than 50 per cent from immovable property in the other state. Under the Spain-US treaty, Article 13.4 taxes gains from shares where the seller held at least 25 per cent of the capital in the 12 months before the sale. If you hold a Spanish property through a company, the article that applies depends on your treaty.

What is the MLI and how does it change Spain’s tax treaties?

The Multilateral Instrument (MLI) is an OECD treaty signed by Spain on 7 June 2017 and ratified on 28 September 2021, entering into force for Spain on 1 January 2022. It modifies Spain’s existing bilateral tax treaties in one stroke, without the need to renegotiate each one individually, by transposing BEPS anti-avoidance measures into them. The UK government’s published synthesised text of the MLI and the Spain-UK Convention confirms that the MLI provisions took effect for the Spain-UK treaty from 1 January 2023 for withholding taxes and from 1 January 2023 for other taxes in Spain.

The most consequential change for property owners is the Principal Purpose Test (PPT) in Article 7 of the MLI. The PPT allows the Spanish tax authority to deny treaty benefits, including reduced withholding rates and relief from double taxation, if obtaining a tax benefit was one of the principal purposes of an arrangement or transaction. This is a broader test than the previous limitation-on-benefits rules, because it looks at purpose rather than formal ownership thresholds.

For most non-resident property owners who hold property directly in their own name, declare rental income transparently on Modelo 210 and pay the 19 per cent IRNR rate, the PPT is unlikely to bite. The treaty benefit they claim (a credit in their home country for Spanish tax paid) is the standard, intended use of the convention, not an abusive structure. The PPT matters most in three scenarios:

1. Holding Spanish property through a company in a treaty country solely to access a lower withholding rate on rental income or capital gains, where the company has no real substance or economic purpose beyond the tax saving.
2. Treaty shopping through a conduit structure where rental income from Spanish property flows through multiple jurisdictions to reach a treaty partner with a favourable rate, without genuine business purpose.
3. Structured disposals designed to route a capital gain through a jurisdiction whose treaty with Spain does not tax real estate gains, where the structure exists primarily for that purpose.

The OECD maintains the MLI positions of all signatories, including Spain’s list of reservations and notifications, on its BEPS MLI pages. Each covered treaty must be read alongside its synthesised text to see which MLI provisions apply.

What is the residency tie-breaker rule and why does it matter for property owners?

Spanish domestic law, under Article 9 of Ley 35/2006, treats you as tax resident if you spend more than 183 days in Spain in a calendar year, if your centre of vital interests is in Spain, or if your dependent spouse or minor children live there. If you are resident in Spain, you pay IRPF on your worldwide income, including any foreign rental income and foreign gains. The tax residency and 183-day rule guide explains the domestic tests in detail.

The DTA tie-breaker in Article 4 of the OECD Model can override domestic residency. If you are resident in both Spain and your home country under their domestic laws, the treaty resolves the conflict through a cascade: first, where is your permanent home available; then, where is your centre of vital interests (your personal and economic relations closer); then, where is your habitual abode; then, which nationality do you hold. If the treaty says you are resident in your home country, Spain must treat you as a non-resident for treaty purposes, even if you passed the 183-day test domestically.

This matters for property owners because it determines whether you pay IRPF on worldwide income or IRNR on Spanish-source income only. A fiscal residence certificate from your home tax authority, stating that you are resident within the meaning of the treaty, is the document that triggers the treaty override. Relocators using the Beckham Law special tax regime should note that the regime keeps you as a Spanish tax resident, so the certificate confirms residency without revealing the special IRNR election.

How does the Spain-UK treaty differ from the Spain-US treaty for property owners?

The two treaties share the same OECD Model skeleton but diverge in three ways that affect property owners. First, the UK treaty has no saving clause: the UK does not reserve the right to tax its residents as if the treaty did not exist. The US treaty does, under Article 1 paragraph 3, so a US citizen living in Spain may still face US taxation on worldwide income, with relief provided through Article 24. Second, the property-rich share threshold differs: the UK treaty uses a 50 per cent value test (Article 13.4), while the US treaty uses a 25 per cent participation test over a 12-month period (Article 13.4). Third, the interest article differs: under the Spain-UK treaty, interest from the UK paid to a Spanish resident is taxed only in Spain (Article 11), while the US treaty caps US-source interest tax at 10 per cent (Article 11).

Feature	Spain-UK (2013)	Spain-US (1990)
Saving clause	No	Yes (Article 1.3)
Rental income	Both states, UK credits (Article 6)	Spain taxes, US credits (Article 6)
Capital gains on property	Both states, UK credits (Article 13.1)	Spain taxes, US credits (Article 13.1)
Property-rich shares	More than 50% value test (Article 13.4)	25% participation, 12 months (Article 13.4)
Interest to Spanish resident	Only in Spain (Article 11)	Max 10% in US (Article 11)
MLI modified	Yes, from 1 January 2023	No (US not an MLI signatory)

The MLI modified the Spain-UK convention but not the Spain-US convention, because the United States is not a signatory to the MLI. This means the Principal Purpose Test applies to the Spain-UK treaty but not to the Spain-US treaty, where the older anti-abuse provisions in the treaty text and US domestic law continue to govern.

How do you claim double taxation relief in practice?

To claim relief, you need a fiscal residence certificate from the tax authority of your home country. The certificate must expressly state that you are resident within the meaning of the applicable treaty, not merely that you are liable to tax there. Spain’s tax administration requires this certificate before applying any reduced rate or exemption under a DTA. You file it with your Modelo 210 (non-resident) or IRPF (resident) return. For a non-resident, the certificate supports any claim to a reduced withholding rate on Spanish-source income. For a resident, it supports the deduction for international double taxation on foreign-source income.

The certificate covers a specific tax year, so you need a new one each year you claim relief. If you are resident in Spain and hold foreign property, you also have a reporting obligation: Modelo 720, filed between 1 January and 31 March, declares foreign real estate, foreign bank accounts and foreign securities above EUR 50,000 per category. The obligation does not arise until the value of a category exceeds that threshold, and once filed, a new declaration is required only if the value rises by more than EUR 20,000 above the last declared figure. The annual property holding taxes guide covers the wider non-resident tax stack.

Worked example: UK resident claiming DTA relief on Spanish rental income

Consider a UK tax resident who owns a Marbella apartment let for EUR 18,000 per year. After deductible expenses (community fees, IBI, insurance, management fees totalling EUR 4,500), the net rental income is EUR 13,500. Spain taxes this first at 19 per cent IRNR, filed quarterly on Modelo 210, producing a Spanish tax liability of EUR 2,565 for the year.

In the UK, the landlord declares the full EUR 13,500 of foreign rental income on their Self Assessment. The UK applies the credit method under Article 22 of the Spain-UK Convention: the UK calculates its tax on the EUR 13,500 at the individual’s marginal rate (say 20 per cent, producing EUR 2,700) and then credits the EUR 2,565 already paid in Spain. The UK tax due is EUR 135 (EUR 2,700 minus EUR 2,565). Without the treaty, the landlord would pay EUR 2,700 in UK tax on top of the EUR 2,565 paid in Spain, a total of EUR 5,265. The treaty saves EUR 2,565 of double taxation.

The fiscal residence certificate from HMRC, stating that the landlord is UK resident within the meaning of the Spain-UK Convention, is the document filed with the Spanish return that confirms the treaty applies. The MLI Principal Purpose Test is satisfied here because the arrangement (direct ownership of a holiday home let to tenants) has a genuine economic purpose beyond tax, and the treaty benefit (the UK credit) is the standard intended use of the convention.

What happens if there is no treaty between Spain and your country?

If Spain has no DTA with your country of residence, Spain still taxes your Spanish-source income under domestic non-resident rules (IRNR, flat 19 per cent on rental income and capital gains), but your home state may or may not offer unilateral relief. Spain’s domestic law does provide a deduction for international double taxation in some cases, but it is less comprehensive than treaty relief and depends on the type of income. The Agencia Tributaria maintains the full list of 93 signed treaties on its international taxation pages; if your country is not on it, you should expect to rely on your home country’s unilateral credit system, and you should take advice before assuming any relief. UK buyers post-Brexit covers the practical position for one of the largest non-EU owner groups.

This guide is general information, not legal or tax advice. Rules change and individual circumstances differ. Verify current requirements with an independent lawyer (abogado) or tax advisor (gestor/asesor fiscal) before acting.