The same €500,000 estate can cost a foreign heir almost nothing in one Spanish region and tens of thousands of euros in another. Spain's inheritance tax is a national framework with 17 different regional implementations, and the deceased's choice of tax residence in Spain is one of the most consequential estate planning decisions a family can make. This guide explains how the system works, what the ECJ ruling changed, and how non-residents are treated today.
Spain’s Inheritance Tax: A Delegated System With 17 Outcomes
The Spanish Inheritance and Gift Tax (Impuesto sobre Sucesiones y Donaciones — ISD) is governed at the national level by Law 29/1987 of 18 December. The national law defines the basic structure: taxable events, kinship groups, the tax base calculation, the state-level rates (progressive from 7.65% to 34%), and wealth multipliers.
However, Law 22/2009 on regional financing delegated extensive normative powers over the ISD to Spain’s 17 autonomous communities. Each region can establish its own reductions to the taxable base, its own rate schedule, its own rebates on the final tax bill, and specific conditions for each.
The result is that Spain has, in practice, 17 different succession tax regimes for individuals. The difference between the most generous and the most onerous can represent tens of thousands of euros on a mid-sized estate.
Kinship Groups: The Foundation of the System
The ISD classifies heirs by kinship group, which determines which reductions and rebates apply:
| Group | Who it Covers |
|---|---|
| Group I | Descendants and adopted children under 21 |
| Group II | Spouse, descendants and adopted children aged 21+, ascendants and adoptive parents |
| Group III | Second and third-degree collaterals (siblings, nieces/nephews, uncles/aunts), ascendants and descendants by affinity |
| Group IV | Fourth-degree and more distant collaterals, and strangers |
The most generous regional rebates are concentrated in Groups I and II. Groups III and IV — which include siblings, unmarried partners without registered cohabitation, and non-family beneficiaries — receive far less favourable treatment across all regions.
The 2014 ECJ Ruling: Equalisating Residents and Non-Residents
Historically, non-resident heirs were required to pay ISD under state-level rules only, without access to the generous regional rebates available to Spanish residents. This created a glaring inequity: two children inheriting from the same parent could face radically different tax bills depending solely on where each of them lived.
The European Commission brought proceedings before the ECJ, which in its judgment of 3 September 2014 (Case C-127/12) ruled that Spain violated the free movement of capital under Article 63 TFEU by denying non-residents access to the more favourable regional rules.
The 2014 Reform and Its 2021 Extension
Law 26/2014 added a second additional provision to the ISD Law, allowing heirs and deceased persons resident in EU and EEA countries to opt for the regional rules most favourable to them. This covered EU citizens (German, French, Dutch, etc.) and EEA nationals (Norway, Iceland, Liechtenstein) but excluded residents of third countries.
Law 11/2021 on anti-fraud measures extended the equalisation to all non-residents, regardless of their country of residence. Since 2021, a US, UK, Australian, or Canadian heir inheriting Spanish assets can opt for the regional rules of the autonomous community where the highest-value Spanish assets are located.
Regional Comparison: All 17 Autonomous Communities, 2026
The table below summarises the treatment for direct heirs (Groups I and II) across Spain’s regions. Regional regimes are updated annually — always verify the current rules at the time of inheritance settlement [VERIFY: confirm all regional data against 2026 legislation]:
| Autonomous Community | Group I+II Rebate | Notes |
|---|---|---|
| Madrid | 99% on final tax bill | No cap on asset value. Most favourable for large estates. |
| Andalucia | 99% on final tax bill | Since 2022, no taxable base cap. Equivalent to Madrid. |
| Cantabria | ~100% for Groups I+II | Effective exemption for direct heirs. [VERIFY] |
| La Rioja | 99% for Groups I+II | Highly favourable. Equivalent to Madrid. [VERIFY] |
| Murcia | 99% for Groups I+II | Effective full rebate for direct heirs. [VERIFY] |
| Balearic Islands | 99% for Groups I+II | Since 2023. [VERIFY] |
| Aragon | Combined reductions + rebate | Variable. 2022 reform. [VERIFY] |
| Valencia | Base reduction + rebate | Effective low rate for Groups I+II since 2023. [VERIFY] |
| Galicia | 99% for spouse; specific reduction for children | Not uniform across Group I vs II. [VERIFY] |
| Castilla y León | Specific reductions + rebate | Variable by estate size. [VERIFY] |
| Canary Islands | Combined reductions + rebate | Significantly reduced effective rate for direct heirs. [VERIFY] |
| Castilla-La Mancha | Base reduction + rebate | Variable. [VERIFY] |
| Extremadura | Base reduction + rebate | Variable. [VERIFY] |
| Catalonia | 99% Group I; variable Group II | Thresholds apply. Less favourable for large estates. [VERIFY] |
| Asturias | Partial | Significant net tax for large estates. [VERIFY] |
| Navarra (Foral) | Foral regime — 100% for direct heirs | Own rules, very favourable. [VERIFY] |
| Basque Country (Foral) | Foral regime — ~1.5% flat rate | Own rules. [VERIFY] |
Note on Foral Territories: The Basque Country and Navarra have their own chartered tax systems (regímenes forales) and do not apply the national ISD Law. Their rules differ significantly from the rest of Spain and must be verified independently.
Worked Example: A €500,000 Estate Inherited Across Five Different Regions
Scenario: Wilhelm, a German citizen resident in Munich. His father, Karl, a Spanish tax resident for the past eight years, dies leaving a net estate of €500,000 (Spanish property: €350,000; Spanish bank account: €150,000). Wilhelm is the sole heir (Group II — adult child aged 21+).
The applicable regional rules are those of the autonomous community where Karl had his habitual residence. Wilhelm can opt to apply those regional rules since the 2021 reform.
| Region Where Karl Lived | Approximate Gross Liability | Regional Rebate | Approximate Net Tax |
|---|---|---|---|
| Madrid | ~€68,000 | 99% | ~€680 |
| Andalucia | ~€68,000 | 99% | ~€680 |
| Cantabria | ~€68,000 | ~100% | ~€0 [VERIFY] |
| Catalonia | ~€68,000 | Variable | ~€15,000–25,000 [VERIFY] |
| Asturias | ~€68,000 | Partial | ~€20,000–30,000 [VERIFY] |
Key takeaway: Karl’s choice of tax residence in Spain is the single largest variable in Wilhelm’s inheritance tax bill. Establishing tax residence in Madrid or Andalucia in the years before death can save direct heirs tens of thousands of euros.
The Connecting Factor Rules: Which Region Has Jurisdiction
Law 22/2009 determines which autonomous community has jurisdiction to assess the ISD through “connecting factor” rules:
- Principal rule for resident deceased: The competent community is the one where the deceased had their habitual residence for the greatest number of days within the five years immediately before death.
- It is not the last year that counts — it is the cumulative five-year period. A deceased who lived in Catalonia for three years and then moved to Madrid for two years before death falls under Catalonia’s rules.
- For non-resident deceased with Spanish assets: AEAT has competence, but the heir can opt for the regional rules of the community where the highest-value Spanish assets are located.
This five-year look-back means that planning decisions must be made well in advance of a foreseeable inheritance event.
Non-EU Heirs: Position After Law 11/2021
Before 2021, a US, Australian or Canadian heir inheriting Spanish assets was subject only to state-level ISD rules, without access to the regional rebates. Effective rates could be significantly higher than those applicable to Spanish residents.
Law 11/2021 eliminated this discrimination. Any non-resident heir — regardless of country of residence — can now opt for the regional rules of the autonomous community where the highest-value Spanish assets are located. For a portfolio of Spanish properties concentrated in Madrid, the non-resident heir in New York can apply the 99% Madrid rebate.
Cross-Border Estates: Additional Considerations
EU Succession Regulation (EU 650/2012)
For estates with connections to multiple EU Member States, Regulation 650/2012 (the “European Succession Regulation”) establishes that the law applicable to the succession as a whole is that of the State of the deceased’s last habitual residence. This determines which country’s succession law governs the distribution of the estate, though it does not override national tax rules — ISD is a tax matter governed by Spanish domestic law, not by the Succession Regulation.
Double Taxation Treaties on Inheritance
Spain has a limited number of double taxation treaties specifically covering inheritance (with Sweden, France, Greece, and a few others). In their absence, double taxation can arise when both Spain and the heir’s country of residence tax the same assets. Each country’s domestic law resolves this differently — some provide unilateral relief, others do not. BMC can assess the treaty position for specific estate profiles.
Wealth Tax as a Forward-Looking Signal
Non-resident heirs who inherit Spanish real estate should also consider the Spanish Wealth Tax (Impuesto sobre el Patrimonio) or the Solidarity Tax on Large Fortunes (ITSGF) that may apply to the inherited assets in subsequent years, if their value exceeds the applicable exemption thresholds. Estate planning must account not just for the ISD at the moment of inheritance but for the ongoing annual holding cost of the inherited assets.
When to Act: Pre-Death Planning Is Critical
ISD cannot be effectively planned reactively after death. The key decisions must be made in advance:
- Establish the deceased’s tax residence in a favourable autonomous community (Madrid, Andalucia, Cantabria) at least during the five-year period before death.
- Review asset ownership structure: lifetime gifting can generate gift tax (also ISD, also delegated to autonomous communities with their own rebates).
- Verify the matrimonial property regime: different rules apply depending on whether assets are joint (gananciales) or separate property, with consequences for both ISD and income tax.
- Simulate the applicable law before death: if the deceased resides abroad and holds Spanish assets, BMC can prepare a simulation under the applicable autonomous community rules.
The Spain Expat Tax Guide 2026 includes ISD and its interaction with the cross-border wealth of residents and non-resident investors. Our team specialising in non-resident wealth planning can prepare a personalised simulation before it is needed.
Sources
- Law 29/1987, Spanish Inheritance and Gift Tax — BOE-A-1987-28141
- Law 22/2009, regional financing — BOE-A-2009-20375
- ECJ Judgment C-127/12, Commission v. Spain, 3 September 2014 — curia.europa.eu
- Law 26/2014, ISD reform for non-residents — BOE-A-2014-11714
- Law 11/2021, anti-fraud measures — BOE-A-2021-11473
- AEAT — Inheritance Tax non-residents — sede.agenciatributaria.gob.es
