Why does a "national" inheritance tax produce such different bills?

Spain has a single state-level inheritance tax law, Ley 29/1987, which defines the taxable event, the taxpayers and the general assessment rules across the whole common-regime territory. But since Ley 22/2009 devolved normative powers to the Comunidades Autónomas, each region can modify four specific elements of the tax:

• Reducciones propias (own reductions): additional deductions from the taxable base for spouses, children, parents, disabled heirs, or transfers of the family business, on top of the state minimums.
• Escala de gravamen (rate scale): the progressive rate applied to the taxable base — some regions keep the state's scale (7.65%–34%), others use their own, sometimes flatter, scale.
• Coeficientes multiplicadores: multipliers applied depending on the heir's pre-existing wealth and their kinship group relative to the deceased.
• Bonificaciones en cuota: a percentage rebate applied directly to the final tax liability after all the above calculations — this is where the most dramatic regional differences appear.

Because these four levers stack differently in each region, two heirs receiving an identical net inheritance can end up with a final tax bill that differs by a factor of ten or more, purely because of where the deceased happened to live — a detail that catches many foreign heirs of Spanish assets completely off guard. Outside this common-regime scheme sit the País Vasco and Navarra, which have their own foral tax rules under the Concierto and Convenio Económico respectively, adding a further layer of complexity for anyone dealing with successions across multiple Spanish regions.

Madrid's near-elimination of inheritance tax for close family

Comunidad de Madrid applies a 99% bonificación en cuota for Group I (descendants and adopted children under 21) and Group II (descendants over 21, spouses, ascendants) heirs. In practice, this means that after the tax is calculated under the general rules, 99% of that final amount is simply rebated. For an estate that would otherwise generate a theoretical liability of, say, €40,000, the heir ends up paying roughly €400. This is why Madrid is frequently cited in estate-planning discussions as the most favourable region in Spain for inheritances between close relatives.

Andalucía takes a different route to a similar result: instead of a flat bonificación, it applies a reducción propia of up to €1,000,000 on the taxable base for Group I/II heirs, which in practice exempts most family inheritances below that threshold from tax entirely. Cataluña applies a bonificación that decreases as the taxable base grows (from around 99% down to roughly 20% for larger estates), and the Comunidad Valenciana applies a 50% bonificación for Group I/II heirs — a meaningfully lighter burden than the state default, though heavier than Madrid or Andalucía. These exact thresholds and percentages change with almost every regional budget law, so any figure should always be checked against the current normativa autonómica for the specific tax year of death, not a prior year's rules.

Regions where the tax bite is still significant

At the other end of the spectrum, regions such as Asturias have historically maintained higher effective taxation for larger estates, with reductions that phase out or shrink substantially once the taxable base passes certain thresholds, and multiplying coefficients that remain closer to the state defaults for heirs outside the closest kinship groups. This does not mean these regions offer no relief at all — most still have some Group I/II reduction — but the combined effect of the scale, the coefficients and a smaller bonificación can leave a materially larger final bill than in Madrid or Andalucía for a comparable estate.

For foreign heirs unfamiliar with this patchwork, the practical lesson is: never assume the Spanish inheritance tax outcome based on what a friend or relative paid after inheriting property in a different region of Spain. The applicable rules depend on the deceased's specific point of connection, not on general assumptions about "Spanish inheritance tax" as a single, uniform regime.

How is the deceased's "habitual residence" determined for this purpose?

This is the single most consequential technical question in cross-border and cross-regional Spanish successions, and it is frequently misunderstood. The point of connection is not simply "the region on the deceased's DNI" or "where they were registered on the padrón at the moment of death." Under Art. 32 of Ley 22/2009, habitual residence for inheritance tax purposes is determined by counting the number of days the deceased spent in each Comunidad Autónoma during the five years immediately prior to death, counted from date to date, and applying the rules of whichever region accounts for the greatest number of those cumulative days — the five years do not need to have been spent continuously in a single territory.

This has direct implications for heirs of people who:

• Retired to Spain from abroad and split time between a Spanish region and their country of origin.
• Moved between Spanish regions in later life — for example, relocating for healthcare, family, or cost-of-living reasons — without formally updating their registered domicile.
• Owned a second home in one region while being registered as resident in another.

In each of these situations, establishing the correct habitual residence — with supporting documentation such as padrón history, utility bills, medical records, or tax return addresses — can change which region's reductions apply, and therefore the size of the final tax bill, by tens of thousands of euros. Spanish courts have on several occasions struck down self-assessments based on purely formal changes of domicile that were not backed by a genuine relocation of the deceased's centre of life, so a real, documented change of residence is what matters — artificially simulating one for tax purposes is not effective and can be challenged by the Agencia Tributaria or the relevant regional tax authority.

What happens when the heir, not the deceased, lives abroad or in a different region?

A separate but related question that trips up many foreign or non-resident heirs is: does my own place of residence matter, or only the deceased's? For inheritance tax purposes, the connecting point is the deceased's habitual residence, not the heir's own residence or nationality, and not the location of the inherited property either — an Andalucía property inherited from someone habitually resident in Madrid is generally taxed under Madrid's rules, not Andalucía's.

However, the heir's own residency status still matters for a different reason. Following the 2014 ruling of the Court of Justice of the European Union (Case C-127/12) on tax discrimination, and the subsequent amendment of Ley 29/1987, heirs resident in the European Union and European Economic Area — and, in many cases following further adjustments, non-EU residents too — are generally entitled to apply the same regional reducciones and bonificaciones that a Spanish-resident heir connected to that region would receive, rather than being confined to the separate, historically less favourable state-only regime that used to apply by default to non-residents.

This matters enormously for the growing population of foreign owners of Spanish property — British, German, Irish, American, and other nationals who inherit a Spanish home, apartment, or bank account from a parent or spouse who was resident in Spain. Filing correctly, in the right regional framework, and within the six-month deadline from the date of death (a single extension of up to six further months can be requested, but only within the first five months) can be the difference between a modest bill and a significantly larger one, plus recargos (surcharges) and interest under the general rules of the Ley General Tributaria.

Donations, by the way, follow a different connecting-point rule than inheritances: for donaciones of movable assets, the relevant point of connection is generally the donee's habitual residence, not the donor's; for real estate, it is the location of the property. Applying the inheritance rule to a lifetime gift is a common and costly mistake.

Practical steps for foreign heirs of Spanish assets

1. Establish the deceased's habitual residence for the relevant five-year window, with documentary evidence, before assuming which region's reductions apply.
2. Obtain a NIE (Número de Identificación de Extranjero) if you do not already have one — it is required to file the self-assessment (autoliquidación) of the ISD as a non-resident heir.
3. Check the current-year regional reducciones and bonificaciones in force where the deceased was resident — these change frequently and must reflect the tax year of death, not an earlier year.
4. File within six months of the date of death, or request the standard extension within the first five months if more time is needed to gather documentation.
5. Coordinate with a gestoría or asesor fiscal familiar with cross-border successions — this is exactly the kind of recurring, precedent-heavy query that a well-configured advisory tool like IgeraGestories is built to answer consistently, citing the specific regional and state rules that apply.

Frequently Asked Questions