Inheritance tax in Spain for foreigners: what non-residents and expats must know

Spanish inheritance tax: the key facts for foreign heirs

When someone dies holding Spanish assets — a holiday home on the Costa del Sol, an investment apartment in Barcelona, a bank account at CaixaBank — Spain’s Impuesto sobre Sucesiones y Donaciones (ISD) applies. The tax is owed by the heirs, not the estate, and it must be paid in Spain within six months of the date of death.

This obligation falls on foreign heirs regardless of their nationality, residence, or whether they live anywhere near Spain. A British couple inheriting their parents’ Marbella apartment, a German national inheriting a Barcelona flat from a Spanish partner, a US national inheriting their Spanish-resident parent’s estate — all face Spanish ISD.

The legal basis is Ley 29/1987, de 18 de diciembre, del Impuesto sobre Sucesiones y Donaciones, developed by Real Decreto 1629/1991. The autonomous communities (comunidades autónomas) have wide powers to modify the rates, reductions, and bonuses — which is why ISD varies so dramatically across Spain that some heirs in Madrid pay virtually nothing while heirs in Catalonia pay significant amounts on the same asset value.

The regional bonus revolution: what the ECJ ruling means for you

Before the European Court of Justice’s landmark ruling in case C-127/12 (European Commission v Spain, November 2014), Spain applied a discriminatory system: non-residents were charged national-scale ISD without access to the generous regional bonuses available to Spanish residents. In Andalucía, a resident heir might pay 1% effective ISD on a €500,000 property; a non-resident heir on the same asset would pay 7–15%.

The ECJ declared this discriminatory and contrary to EU law. Spain amended its domestic legislation to extend regional bonuses to non-residents based on where the assets are located (for property) or where the deceased was resident (for financial assets).

In 2026, the position is clear:

• A non-resident inheriting Spanish property in Madrid or Andalucía can claim the regional bonus applicable in those communities — which for Group I (children under 21) and Group II (other children, parents, spouses) heirs is up to 99% of the ISD liability
• A non-resident inheriting Spanish property in Catalonia or Valencia accesses those communities’ more moderate reductions, which are still more favourable than the national scale
• UK nationals post-Brexit retain these rights under Spain’s domestic legislative amendments, which do not require EU membership

The practical effect: a British son inheriting a €600,000 Marbella apartment from his British father (who was resident in Spain) can reduce his Spanish ISD bill to near-zero if the applicable community is Andalucía and the Group II bonus applies.

ISD rates and reductions: the national framework

Where no regional bonus applies (or for the portion not covered by a regional reduction), the national ISD scale applies. The gross tax is calculated by applying tariff rates, modified by a coefficient based on the heir’s pre-existing wealth and their kinship group:

The applicable kinship groups determine the baseline personal reduction:

• Group I: children under 21 — €15,956 personal reduction plus €3,990 per year of age under 21
• Group II: children 21+, parents, grandparents, spouse/civil partner — €15,956 personal reduction
• Group III: siblings, uncles/aunts, nephews/nieces — €7,993 personal reduction
• Group IV: other relatives and non-relatives — no personal reduction

These national figures are minimum baselines. Autonomous communities frequently set far higher personal reductions — Catalonia, for instance, offers €100,000 for Group II; Madrid sets €25,000 per heir.

The six-month deadline: what it means in practice

The ISD filing deadline is six months from the date of death. This is one of the shortest inheritance tax deadlines in Europe and it frequently catches foreign heirs off guard. Six months is rarely enough time to:

• Obtain death certificates and official translations
• Identify and value all Spanish assets
• Gather the five prior years of IP returns (required for the valuations crosscheck)
• Complete the UK or home-country probate process in parallel
• Instruct a Spanish notary for the deed of acceptance

The law provides a single formal extension mechanism: heirs can request a six-month extension from the relevant autonomous community’s ISD office within the first five months after death. The extension is generally granted for cross-border estates. If the request is not made within month five, the basic six-month deadline applies and surcharges begin to accrue automatically from day one after expiry.

BMC manages deadline tracking from the first instruction. For complex cross-border estates, we file the extension request as a standard protective measure within the first few weeks of engagement.

Valuing Spanish property for ISD: the reference value issue

Since Ley 11/2021 came into force, the AEAT’s valor de referencia (reference value) has been the legally presumed minimum market value for Spanish real estate in ISD assessments. If you declare a lower value in the ISD return, the AEAT will automatically uplift it to the reference value and apply a surcharge on the difference.

The reference value is published by the Catastro (land registry authority) and is based on recent comparable sales data. For many coastal and city properties, it approximates market value closely. However, in some markets or for unusual properties, the reference value can exceed the actual market value — particularly for coastal properties where the market has softened or for properties with specific condition issues.

Where we believe the reference value overstates market value, we obtain a RICS-certified independent appraisal and file with the lower value, accepting that the AEAT will challenge it. We then manage the comprobación de valores (AEAT valuation challenge) process and present the independent appraisal as evidence. This approach typically produces a negotiated reduction to the challenged figure.

Cross-border estates: Spain plus UK, Germany, or USA

Most foreign heirs dealing with a Spanish estate are simultaneously dealing with an estate process in another country. The combination creates complexity that single-jurisdiction advisers cannot fully manage.

Spain + UK. The UK applies Inheritance Tax (IHT) on the worldwide estate of UK-domiciled deceased persons, and on UK-situs assets of non-domiciled deceased. Spanish property inherited by UK heirs is typically outside UK IHT (it’s a non-UK asset of a potentially non-UK domiciled deceased), but this depends on the domicile analysis. Where both UK IHT and Spanish ISD apply to the same asset, the UK’s section 159 IHTA 1984 provides a credit for foreign tax paid on foreign property — but the credit mechanism must be claimed actively, and the timing of Spanish ISD payment relative to UK IHT calculation matters.

Spain + Germany. Germany’s Erbschaftsteuer applies to the worldwide estate of German-resident deceased persons and to German nationals’ estates regardless of residence. Germany has bilateral inheritance tax treaties with only a handful of countries; Spain is not one of them. German heirs of Spanish property must pay ISD in Spain and Erbschaftsteuer in Germany on the same asset, with German law providing an Anrechnungsverfahren (credit mechanism) for foreign tax paid. Coordinating the two systems requires simultaneous engagement of German and Spanish specialists.

Spain + USA. US citizens and Green Card holders face US federal estate tax on worldwide assets. The US-Spain income tax treaty does not cover estate or inheritance taxes. The US IRC §2014 provides a foreign tax credit for estate taxes paid to foreign countries, but Spanish ISD is technically the heir’s tax, not the estate’s tax — the credit availability depends on how ISD is classified under US federal tax law in each case. US heirs should engage a US-qualified estate attorney alongside BMC.

Inter vivos gifts: ISD applies in life too

ISD is not limited to inheritances — it also applies to lifetime gifts. If a Spanish parent gifts a property to a child, or if a foreign parent gifts Spanish shares to a child, ISD is payable by the recipient. The same rates and regional bonuses apply. The filing deadline for gifts is one month from the date of the gift (compared to six months for inheritances).

In some communities, gifts receive less favourable treatment than inheritances — Catalonia and the Basque Country apply different rules to inter vivos gifts versus mortis causa transfers. In others, gifts can be more tax-efficient if timed correctly relative to the applicable regional bonus structure.

BMC advises families on lifetime gift planning as part of an integrated succession strategy, modelling the ISD cost of various scenarios before any transfer is executed.

Accepting the inheritance: the notaría process

Before heirs can formally receive Spanish property and register it in their name, they must execute a notarised deed of acceptance of inheritance (escritura de aceptación de herencia) before a Spanish notary. The notary requires:

• The Spanish death certificate (certificado de defunción) and, where the deceased died abroad, an apostilled official translation
• Evidence of Spanish assets (land registry extract, bank statements, company registers)
• The ISD payment receipt or deferred payment acknowledgement
• Proof of family relationship (birth certificates, marriage certificate, apostilled)
• The heir’s NIE (Número de Identificación de Extranjero) — all foreign heirs must have a NIE to execute a Spanish notarial deed

BMC assists with NIE applications as part of the estate process. We coordinate with the Spanish notary, prepare all supporting documents, and ensure the escritura is executed and registered at the land registry within the AEAT compliance timeline.

Getting your NIE as an heir

Foreign heirs who do not already have a Spanish NIE (Número de Identificación de Extranjero) must obtain one before they can sign the deed of acceptance before a Spanish notary. The NIE is required for all legal and tax acts in Spain involving foreign nationals — opening a bank account, signing contracts, and accepting an inheritance all require a NIE.

BMC assists heirs with NIE applications as part of the estate engagement. The application is made at the Spanish consulate in the heir’s country of residence (or at a Jefatura Provincial de Extranjería in Spain if the heir is able to travel). For UK nationals since Brexit, the NIE process is the same as for non-EU citizens. Standard processing time is 4–6 weeks; expedited applications are available at some consulates.

How BMC structures the engagement

Phase 1 — Initial assessment (weeks 1–2). We map all Spanish assets, identify the autonomous community rules, model the provisional ISD liability per heir, and confirm whether an extension request is needed. We flag immediate document gathering requirements.

Phase 2 — Documentation and valuation (weeks 3–8). We collect the full documentation package, obtain property valuations, request land registry extracts, and gather bank and securities balances. For foreign estates, we coordinate with the home-country executor or estate administrator.

Phase 3 — ISD return preparation and filing. We prepare Modelo 650 or 651 with full supporting documentation, apply all available reductions and bonuses, and file with the autonomous community tax office. We provide the heirs with a complete record of the declaration and payment.

Phase 4 — Notarial deed and land registry. We coordinate the escritura de aceptación, accompany or represent heirs at the Spanish notary, and register the deed at the land registry. The process culminates in updated title documents in the heirs’ names.

Phase 5 — Post-succession compliance. Following the transfer, the heirs’ ongoing obligations (IP, IRNR if non-resident, IBI council tax) are assessed and set up for ongoing compliance.

Frequently asked questions

What happens if I miss the six-month ISD deadline? Filing after the deadline attracts automatic late-payment surcharges: 5% within 3 months of the deadline, 10% within 3–6 months, 15% within 6–12 months, and 20% thereafter, plus interest. Formal penalties (50%–150%) apply only if the AEAT opens an inspection before the heir voluntarily files. Voluntary filing, even late, is always better than being caught by an inspection.

Can I defer payment of ISD if the estate is property-rich but cash-poor? Yes. Where the ISD liability cannot be paid from liquid assets without selling the inherited property itself, heirs can request deferment of payment (aplazamiento o fraccionamiento) from the autonomous community tax office. Installment payment plans of up to five years are available in most communities, subject to providing adequate security (typically a bank guarantee or a mortgage on the inherited property itself). BMC manages deferral applications as part of the compliance process.

Can I disclaim the Spanish inheritance? Yes — a formal renunciation (repudiación de herencia) before a Spanish notary is legally valid and diverts the inheritance to the next-in-line heirs under Spanish succession law. Heirs sometimes disclaim when the property is mortgaged above its value or when the ISD liability would exceed the asset’s worth. Importantly, a foreign renunciation (e.g. a UK deed of variation) is not automatically recognised in Spain — a separate Spanish notarial deed is required.

I hold a Spanish property jointly with my partner and one of us dies — what happens? For jointly held property, only the deceased’s share forms part of the taxable estate for ISD. If the property was held in equal shares, 50% of the market value is included in the ISD calculation. The surviving co-owner retains their 50% without any ISD. The surviving co-owner may also need to update the land registry registration to reflect the new ownership structure through the notarial deed process.

Does having a Spanish will help? Yes, significantly. A Spanish will (testamento otorgado ante notario español) covering Spanish assets simplifies the succession considerably — it avoids the need to have a foreign will apostilled, translated, and recognised in Spain, and it can be structured to take advantage of Spanish succession law provisions and regional bonus regimes. BMC works with Spanish notaries to prepare or review Spanish wills as part of succession planning. Under EU Regulation 650/2012 (applicable in Spain for cross-border successions), EU citizens can choose the law of their nationality to govern their succession — a useful planning tool for EU nationals with Spanish assets.