Inheritance Tax in Spain: A Guide for Non-Residents

When the heir doesn't live in Spain, Spanish Inheritance Tax raises questions that don't come up in a purely domestic succession: which rules actually apply, how much time you have to file, and who can sign on the heir's behalf when they live on the other side of the world. Here is what a non-resident family inheriting in Spain — including in the Canary Islands — needs to know.

Who pays, and on what

Spanish Inheritance and Gift Tax (Impuesto sobre Sucesiones y Donaciones, ISD) taxes the acquisition of assets and rights through inheritance, legacy, or any other succession title. Both Spanish tax residents and non-residents can be liable for it, though the basis for liability differs: residents are taxed on their worldwide inheritance ("personal obligation"), while non-residents are taxed only on assets located in Spain — a property in Gran Canaria, for instance — regardless of where the heir lives ("real obligation").

In practice, this means an heir who has never set foot in Spain can still owe this tax, simply because what they're inheriting is here.

Which rules apply: state, regional, or your home country's

Spain devolves the administration of Inheritance Tax to its autonomous regions, which can approve their own reductions, rebates and coefficients — and these differ substantially from one region to another. The Canary Islands, in particular, apply significant rebates for close relatives.

The decisive question is which region's rules apply, and the answer isn't always obvious when the heir doesn't live in Spain. As a general rule, for non-residents the applicable regional rules are those of the region where the greatest value of the Spanish estate is located. If the assets are in the Canary Islands, it is Canarian rules that apply — not the (usually less favourable) default state rules.

The right to equal treatment as a non-resident

Until fairly recently, non-residents — and EU/EEA non-residents in particular — were excluded from regional rebates and were taxed under the state rules, which are noticeably harsher. The Court of Justice of the European Union ruled that this difference in treatment breached the free movement of capital, and Spanish law was amended to let EU and European Economic Area residents apply the regional rules that would otherwise correspond to them.

That change has since been extended, with some nuances, to residents of certain non-EU countries in specific circumstances connected to Spain. Exactly which rules apply depends on the date of death and the precise residence of both the deceased and the heir, so it's worth checking case by case rather than assuming — the difference between the Canary Islands' regional rebate and the state rules can be very substantial in the final amount due.

Assuming that, because you don't live in Spain, you automatically pay under the state rules is the single most common reason non-resident families end up overpaying.

The six-month deadline

Inheritance Tax must be self-assessed within six months of death, extendable by a further six months if the extension is requested within the first five. The clock runs the same way for residents and non-residents alike, and it does not pause because the heir takes time to find out about the inheritance, gather the paperwork, or appoint a representative.

Miss the deadline and, on top of surcharges and late-payment interest, you also lose the ability to request the extension — the request has to be made within those first five months, not once probate is finished.

Form 650 and acting through a representative

The self-assessment is filed using Form 650 (Modelo 650), with the tax authority that corresponds to the applicable region — in the case of the Canary Islands, the Canary Islands Tax Agency (Agencia Tributaria Canaria). To file it, a non-resident heir needs, among other things, a Spanish NIE or NIF tax identification number, and in many cases will need to act through a representative — either under a power of attorney granted abroad and properly apostilled or legalised, or through a tax representative where the law requires one.

None of this happens in a day. Applying for an NIE, legalising a power of attorney at a consulate or through an apostille, and coordinating signatures with an heir in a different time zone can eat up a large part of the six-month deadline if you don't start immediately.

The risk of double taxation

A non-resident heir may also be liable for an equivalent tax in their country of residence. Spain has treaties specifically preventing double taxation on inheritances with only a limited number of countries — this is not the norm, unlike income tax treaties — so it's worth checking from the outset whether such a treaty applies, or whether, failing that, the heir's country of residence offers some unilateral relief for tax already paid in Spain.

Missing this step can mean paying tax twice on the same inheritance, with little realistic chance of recovering the excess afterwards.

The Canary Islands' own rules

The Canary Islands have regulatory authority over Inheritance Tax, and their regime for close relatives — descendants, spouse and ascendants — is among the most favourable in Spain, with very substantial rebates on the amount due. That is precisely why working out which rules apply matters so much for a non-resident heir: the difference between the Canarian regional rebate and the default state rules can multiply the final bill several times over.

Two notes of caution. First, these rebates have been amended more than once in recent years, so it's essential to check the version in force on the date of death, since that is the one that applies. Second, the advantage is concentrated in close-kinship groups; for nieces, nephews, siblings or other relatives the tax treatment can be very different, and it's worth calculating this before deciding how to accept the inheritance.

The mistakes non-resident heirs make most often

• Starting the NIE and representation paperwork several months in, leaving very little margin before the deadline.
• Assuming without checking that the state rules apply, and missing out on regional rebates they were actually entitled to.
• Not checking whether a double-taxation treaty, or an equivalent relief, exists with their country of residence.
• Signing a power of attorney abroad without the correct apostille or legalisation, which means repeating the process and losing weeks.
• Confusing the tax deadline with the probate timeline: they are independent processes, and the tax office doesn't wait for the estate to be formally divided.

A succession involving a non-resident heir isn't, in itself, more complicated than any other. It does require starting earlier, because nearly every deadline that matters runs from the date of death — not from whenever the family manages to get organised from a distance.

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Notice: this article is for general information purposes and reflects the law in force on its publication date. It is not legal or tax advice for any specific case. Before making any decision, consult a professional.