Spain-UK Inheritance Tax Planning: Strategies for British Expatriate Families
For British expatriate families in Spain, the planning of inheritance tax involves the coordination of UK inheritance tax (IHT) and Spanish inheritance tax (ISD). The UK applies IHT on the worldwide estate of UK-domiciled persons; Spain applies ISD on Spanish-situs assets regardless of residence and on the worldwide assets received by Spanish-resident heirs. The two taxes can produce double taxation that is mitigated only by unilateral credits (no bilateral treaty between Spain and UK on inheritance tax). The planning strategies include the regional choice for Spanish ISD, the UK domicile analysis, lifetime gifts, trusts, and various other techniques. This article covers the comprehensive planning approach for British-Spanish families. A dedicated international tax adviser with UK-Spain expertise is essential.
The two tax systems: UK IHT and Spanish ISD
UK Inheritance Tax (IHT) applies to the worldwide estate of UK-domiciled persons at the rate of 40% above the nil-rate band (currently £325,000, with possible additional residence nil-rate band of up to £175,000 for property left to descendants). Spouse-to-spouse transfers are exempt; transfers to qualifying charities are exempt. The tax is paid by the estate to HMRC.
Spanish Inheritance Tax (ISD) applies to the heirs (not the estate), with progressive rates and substantial regional variations. For direct family inheritances of property in regions with the 99% reduction (Andalusia, Madrid, Valencia), the Spanish tax is typically a few hundred euros. For more distant relatives, the tax can be substantial.
UK domicile: the key factor
UK domicile (not residence) determines the scope of UK IHT. A UK-domiciled person is subject to IHT on worldwide assets; a non-UK-domiciled person is subject to IHT only on UK-situs assets. The domicile determination is complex and depends on intention, family ties, and other factors. Many British expatriates in Spain retain UK domicile despite long Spanish residence.
For very long-term British expatriates in Spain who genuinely intend to remain there permanently, achieving non-UK domicile is theoretically possible. The test typically requires 15+ years of UK non-residence plus clear evidence of permanent intent. Achievement of non-UK domicile eliminates UK IHT on the worldwide estate, leaving only UK-situs assets subject to UK IHT.
The Spanish ISD for British heirs
British heirs (whether UK or Spanish resident) inheriting Spanish property are subject to Spanish ISD. The regional reductions apply regardless of the heir’s residence (post-2014 ECJ rulings). For an Andalusian property inherited by direct family members, the Spanish tax is minimal (a few hundred euros). For heirs of less common relationships, the tax can be substantial.
For Spanish-resident British heirs receiving an inheritance from a UK-resident parent (assets in both countries), the Spanish tax applies to the worldwide inheritance with credit for UK tax. The Spanish-side tax can be material on the worldwide estate, depending on the relationship and the region. Professional planning is essential.
The unilateral credit mechanisms
In the absence of a bilateral inheritance tax treaty between Spain and the UK, the avoidance of double taxation relies on unilateral credits. The UK provides a unilateral credit (under the Inheritance Tax Act 1984) for foreign inheritance tax paid on assets located outside the UK. Spain provides a unilateral credit (article 23 of the ISD Act) for foreign inheritance tax paid on Spanish-situs assets.
The credits are limited to the respective country’s tax on the same assets. For high-value estates where both countries apply substantial tax, the credits do not fully eliminate the double taxation. The professional structuring of the estate can reduce the overlap and minimize the cumulative tax burden.
Strategy 1: regional choice for Spanish ISD
The most powerful Spanish-side strategy is the regional choice. For a British expatriate planning the estate, establishing Spanish residence in a region with favorable ISD (Andalusia, Madrid, Valencia) ensures that Spanish-side tax is minimized. The Spanish residence determines the region for inheritances by Spanish-resident heirs; the location of the most valuable Spanish asset determines the region for inheritances from non-resident deceased.
For a British expatriate moving to Spain in retirement, the choice of region should consider the inheritance tax implications as well as the income tax and wealth tax. Andalusia offers the best combination for many retirees: favorable income tax, favorable wealth tax (with the new bonification), favorable ISD with the 99% reduction. Madrid is similar but with a higher cost of living for the typical British retiree.
Strategy 2: lifetime gifts using UK exemptions
UK IHT has various lifetime gift exemptions: annual exemption of £3,000; small gifts of £250 per recipient; gifts in consideration of marriage; gifts to charities. Lifetime gifts that exceed the exemptions are potentially exempt transfers (PETs) — they become fully exempt if the donor survives 7 years, with tapering relief between 3 and 7 years. The strategy of lifetime giving can substantially reduce the UK IHT exposure.
For Spanish residents making lifetime gifts, the gift may also trigger Spanish gift tax (which is on the same scale as inheritance tax with similar regional reductions). The combination of UK lifetime giving rules and Spanish gift tax can be planned to be tax-efficient, particularly with the regional reductions on the Spanish side.
Strategy 3: trusts and other structures
UK trusts can be used in UK IHT planning but their treatment in Spain is complex. Spain does not have a native trust concept and the recognition of foreign trusts is limited. Spanish-resident beneficiaries of UK trusts may be subject to Spanish tax on the trust income and assets in ways that differ from the UK treatment. The use of trusts for Spanish residents requires careful analysis.
Other structures (companies, foundations) can be used but each has its own implications in both countries. The general approach for British-Spanish families is to keep the structures relatively simple and to rely on the regional reductions and the unilateral credits, rather than complex international structures that may not work well in Spain.
Strategy 4: spouse transfers
Both UK IHT and Spanish ISD treat spouse transfers favorably. UK IHT has an unlimited spouse exemption (transfers to a UK-domiciled spouse) or a limited exemption (transfers to a non-UK-domiciled spouse, currently £325,000 above the NRB). Spanish ISD has the standard spouse treatment in the regional reductions (99% reduction for spouses in Andalusia, Madrid, Valencia).
The standard approach for British-Spanish couples is to leave the estate to the spouse first (exempt from both UK and Spanish tax in most cases) with the substantive distribution to children on the death of the second spouse. This defers the inheritance tax to the death of the second spouse and uses the full nil-rate bands and regional reductions of both spouses.
Strategy 5: Spanish will choosing English law
A Spanish will choosing English law (under EU Regulation 650/2012) is essential for any British expatriate with Spanish property. The choice avoids Spanish forced-heir rules (legítima) and applies English testamentary freedom. The Spanish will only deals with Spanish assets and coordinates with the existing English will dealing with UK assets. Detail in our partner-site article on making a Spanish will after Brexit.
The cost of a Spanish will is modest (€60-€120 for notarial fees) and the protection is substantial. For British expatriates without a Spanish will, the default rule applies the law of habitual residence — which is Spanish law for any long-term resident, with the legítima applying to disinherit non-immediate-family bequests. The Spanish will choosing English law avoids this trap.
Action steps for British-Spanish families
First: assess the UK domicile status with UK tax adviser. Second: choose the Spanish region of residence based on the inheritance tax implications (alongside other considerations). Third: make a Spanish will choosing English law. Fourth: implement lifetime gift strategy with UK exemptions and Spanish gift tax considerations. Fifth: structure the estate with spouse transfers for deferred tax. Sixth: review the planning periodically with both UK and Spanish tax advisers. For a full consultation on Spain-UK inheritance planning, contact our team.
The coordination of UK IHT and Spanish ISD requires professional support in both jurisdictions. The combination of correct regional choice, proper Spanish will, lifetime gift strategy, and ongoing planning can substantially reduce the cumulative tax burden and ensure smooth transmission of the estate to the next generation.