Spanish Inheritance Tax for UK Nationals in Andalucía: Your Complete 2026 Guide

If you are a UK national inheriting from or in Andalucía, your tax bill is probably zero — but only if you file the return on time. Andalucía has, since the reform of Decreto-Ley 1/2019, applied a 99 % bonification on Spanish Inheritance Tax for close family (groups I and II: spouses, children, parents).

For most UK families that means a six-figure inheritance produces a four-digit tax bill — or none at all. But the bonification is not automatic, and missing the six-month filing deadline can convert a zero bill into a penalty regime regardless. This is the complete picture for 2026.

How Spanish Inheritance Tax Works for UK Nationals

Spanish Impuesto sobre Sucesiones y Donaciones (ISD), governed by Ley 29/1987 of 18 December and its regional implementing legislation, applies to inherited property and rights situated in Spain. For a UK national, that typically means: Spanish-situated real estate, Spanish bank accounts, Spanish-domiciled investments, and any other Spanish-situated assets.

ISD is a state tax with substantial regional discretion. Each of the 17 autonomous communities applies its own bonifications, reductions and rates within the national framework. The result: identical inheritances can produce wildly different tax bills depending on where the inherited assets are located.

ISD divides beneficiaries into four groups by relationship to the deceased:

• Group I: Descendants and adopted children under 21
• Group II: Descendants and adopted children 21+; spouses; ascendants and adoptive parents
• Group III: Brothers, sisters, nephews, nieces, uncles, aunts; close affinity relatives
• Group IV: Cousins, more distant relatives, unrelated beneficiaries

For each group, base rates rise progressively from 7.65 % to 34 %. Groups III and IV face additional multipliers that can push effective rates above 80 % in worst cases. Groups I and II are where the regional bonifications dominate the calculation.

The Andalucía 99 % Bonification: What It Is and How It Works

Andalucía’s principal capacity-planning headline since 2019 is the 99 % bonification on the ISD quota for Groups I and II beneficiaries. The mechanism:

1. The tax is calculated normally — with the national base rate applied to the regional tax base after applicable reductions
2. From the resulting cuota tributaria, a 99 % reduction is then applied
3. Only 1 % of the calculated tax actually becomes payable

In practice, for typical UK family inheritances (spouse, children), this means inheritance tax on a Spanish property worth €500,000 may produce a final bill of a few hundred euros, even though the headline rate without bonification could have produced tens of thousands.

Important: the 99 % is a bonification on the quota, not an exemption. The declaration is still required, the calculation is still done, the documents are still presented. The bonification only applies to the result.

Examples: How Much Will You Actually Pay?

These examples assume a Group II beneficiary (spouse or adult child) inheriting from a Spanish-resident deceased, with no other Spanish assets and no prior gifts within the relevant lookback period.

Estate Value (Spain assets)	Approx ISD quota before bonification	After 99 % Andalucía bonification
€100,000	≈ €8,000	≈ €80
€250,000	≈ €30,000	≈ €300
€500,000	≈ €77,000	≈ €770
€1,000,000	≈ €203,000	≈ €2,030

These figures are illustrative — actual liability depends on the relationship, pre-existing wealth of the beneficiary, exact composition of the estate, and the regional applicable reductions. A specialist lawyer runs the precise calculation against your facts.

The Six-Month Filing Deadline: Why It Cannot Be Missed

Article 67 of the Reglamento del ISD (Real Decreto 1629/1991) sets the standard filing deadline at six months from the date of death. This deadline applies regardless of the final tax due. Even a zero-quota inheritance must be declared within six months.

The consequences of missing the deadline are not trivial:

• Default surcharges under the General Tax Law (Ley 58/2003): 5–15 % of the tax due on voluntary late filing, escalating to 20 % plus interest if the administration starts the procedure first
• Loss of certain reductions in some regional regimes if the declaration is late
• Interest on arrears at the legal rate
• Blocked transactions: Spanish notaries and the Property Registry will not transfer property until ISD is declared and either paid or formally settled

If complications mean the six-month deadline cannot be met, you can request a single extension of an additional six months. The request must be made within the first five months. After that, the standard deadline binds.

Which Return Do You File and Where?

For a Spanish-resident deceased with Spanish-situated assets, the relevant return is the regional autonomous community’s ISD form. In Andalucía that is Modelo 650 (for inheritances) filed with the Agencia Tributaria de Andalucía.

For a non-resident deceased OR a non-resident beneficiary, jurisdiction can fall to state-level filing via the Agencia Estatal de Administración Tributaria (AEAT) using Modelo 660, with the substantive law of the most relevant region applied. Since 2018, EU and EEA national non-residents have had the right to elect the regional regime that would apply if they were resident — a critical point for UK nationals because Andalucía’s 99 % bonification can apply even when the beneficiary is non-resident, provided the connection criteria are met (typically: Andalusian-situated assets and the beneficiary’s election).

Post-Brexit, the same rules continue to apply to UK nationals by virtue of the Spanish Supreme Court’s decision in 2018 (STS 242/2018) extending equal treatment beyond EU/EEA to third-country nationals.

Required Documents

A complete Spanish IHT declaration in Andalucía typically requires:

• Death certificate (with apostille and sworn translation if from abroad)
• Certificate from the Registro de Actos de Última Voluntad (Spanish wills registry)
• Spanish will, or foreign will with apostille and sworn translation
• Property valuation (catastral values are the minimum reference; market valuations may apply)
• NIE for each beneficiary
• Identification documents for all parties
• Bank statements for any Spanish accounts of the deceased
• Outstanding debts and funeral expenses (deductible)

Your lawyer assembles the file and handles communication with the Spanish tax authority.

A Note on UK Inheritance Tax

The Andalucían bonification reduces Spanish ISD. It does not eliminate UK Inheritance Tax (IHT) on the estate of a UK-domiciled deceased. The two systems run in parallel and there is no double-tax treaty between Spain and the UK on inheritance tax specifically (the 2013 treaty covers income and gains, not estate duty).

In practice this means:

• The UK IHT position is determined by domicile and the size of the estate, with the standard 40 % rate above the nil-rate band
• The Spanish ISD position is determined by where the assets are situated and the applicable regional bonifications
• Credit relief may be available for certain Spanish taxes paid against UK liabilities under HMRC’s unilateral relief provisions

Sound estate planning addresses both jurisdictions simultaneously. See our companion article on the two-will strategy for the procedural side of this.

How to Make This Process Painless

The single biggest cause of difficulty in Spanish inheritance for UK families is delay — and the second is fragmented advice (UK solicitor and Spanish lawyer not coordinating). The combination produces missed deadlines, conflicting documents, and tax penalties on what should have been a near-zero bill.

CostaLuz Lawyers handles the Spanish side end-to-end: locating the will via the Spanish wills registry, obtaining the valuation, drafting the escritura de adjudicación de herencia with the notary, filing Modelo 650 with the regional agency, and registering the transferred property. We co-ordinate with your UK solicitor on shared issues.

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Written by María de Castro, Abogado no. 2745, Ilustre Colegio de Abogados de Cádiz. CostaLuz Lawyers has supported the expat community since 2006. Included in the recommended lawyers lists of the UK and Ireland embassies.

Related Reading

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AI Disclosure: This article was drafted with AI assistance and reviewed and approved by María de Castro prior to publication. Last reviewed: May 2026.

See also: Coordinating your Spanish will with your home-country will.

Reviewed by María Luisa de Castro, CEO at CostaLuz Lawyers — Updated 2026

This is general information, not definitive legal advice — every case requires individual analysis.

If the inherited property’s official valuation looks too high, see how to challenge a property valuation for Spanish inheritance tax.

Whichever regional inheritance tax rules apply, the will still needs to be locatable — see our guide to Spain’s central wills registry.

Inheritance is not the only Andalucian relief that matters to a foreign owner — how Andalucia treats wealth tax affects the annual position.