US estate tax vs Spanish inheritance tax for Americans in Spain

Many US retirees approach Spain with a familiar American assumption: estate tax is a tax on the estate, and unless the estate is very large there is probably no federal estate tax to pay. That assumption is only half useful in Spain. The United States does tax the estate of a US citizen, and for 2026 the federal threshold is very high. Spain, however, works through a different lens. Spanish inheritance tax is charged to the person receiving the inheritance, and the answer can change depending on where the heir lives, where the deceased lived, where the assets sit and which regional law applies.

This guide is for Americans considering or already holding the non-lucrative visa. It does not replace US estate planning advice, Spanish tax advice or a notarial review of your will. It explains the moving parts so you know which questions to ask before buying Spanish property, becoming a Spanish tax resident, leaving assets to children in the United States, or assuming a US revocable trust solves everything in Spain.

"The question is rarely only whether there is US estate tax. For American families in Spain, the real work is mapping who inherits, where each heir lives, which assets are Spanish, and which regional rules apply. That map should be done while everyone is still available to sign documents."

Two taxes, two different systems

The first planning point is conceptual. The US federal estate tax is a transfer tax on the estate of the deceased person. If a US citizen dies with a worldwide estate above the federal exclusion amount, the estate may have to file a federal estate tax return and pay tax before assets are distributed. The beneficiaries matter, but the tax is centered on the estate.

Spanish inheritance tax, the Impuesto sobre Sucesiones y Donaciones, is different. It taxes the person who receives property by inheritance, legacy or life insurance proceeds. The heir is the taxpayer. That means two children can inherit from the same parent and have different Spanish outcomes if their residence, relationship, prior wealth or applicable regional relief differs. It also means a US family cannot evaluate Spanish tax by looking only at the deceased person's US estate plan.

The US estate tax side

For US citizens, the federal estate tax remains a worldwide system. Moving to Spain, taking Spanish residence, or holding a TIE does not stop the United States from looking at your global estate. IRS guidance for 2026 lists a federal estate tax filing threshold and basic exclusion amount of $15,000,000 for estates of decedents dying in 2026. That means many ordinary retiree estates will not owe federal estate tax, but "not owing federal estate tax" is not the same as "no cross-border estate planning needed."

It is also worth knowing what that exclusion is attached to. It belongs to the citizenship, not to you. Someone who is neither a US citizen nor US-domiciled is taxed on US-situs assets — American real estate and shares in American companies, typically — from a threshold of just $60,000, and there is no US-Spain estate tax treaty to soften the difference. The absence of that treaty has a second, quieter consequence: where Spain does charge inheritance tax on something the United States is also taxing as income — the classic case being an inherited US IRA — there is no instrument coordinating the two, and a US income tax credit does not reach a Spanish inheritance tax. That makes giving up the passport a far bigger estate decision than most people realise: see renouncing US citizenship after retiring to Spain.

There are at least four US issues to keep in view. First, the exemption can change by year, so planning should not freeze around one published amount. Second, lifetime taxable gifts use the same unified credit system, so large transfers before death can affect what remains; note that Spanish gift tax on lifetime gifts taxes the receiver, not the giver, so gifting during life is a separate cross-border decision from inheritance. Third, state estate or inheritance taxes may still matter even when federal tax does not. Fourth, retirement accounts, beneficiary designations, jointly held property and trusts must be coordinated with Spanish succession rules and tax reporting. A US revocable trust may be excellent for avoiding US probate; it may still create Spanish classification, translation and evidence problems if Spanish assets or Spanish resident heirs are involved.

The Spanish inheritance tax side

Spain's inheritance tax applies to acquisitions by individuals. The national law sets the framework, and the tax can apply in resident and non-resident situations. If the heir is resident in Spain, Spain can generally look at what that heir receives worldwide. If the heir is non-resident, Spain can still tax Spanish-situs assets, such as Spanish real estate or certain Spanish rights. A US child who never moves to Spain can therefore still face a Spanish filing if they inherit a Malaga apartment from a parent.

The tax is not a flat "Spanish death tax" number. The base is reduced by allowances, then rates and multipliers can depend on kinship group, disability, existing wealth and regional rules. Close family usually receives better treatment than distant relatives or unrelated beneficiaries. Spouses and children are treated very differently from nieces, friends or unmarried partners who are not legally recognized. That is why the estate plan should identify the actual heirs, not just the asset values.

Issue	United States	Spain
Main taxpayer	The estate of the deceased US citizen	Each heir or beneficiary
Scope	Worldwide estate for US citizens	Worldwide acquisitions for Spanish resident heirs; Spanish assets for many non-resident cases
2026 headline number	$15,000,000 federal exclusion / filing threshold for 2026 deaths	No single national "US-style" exemption; regional allowances and relief can dominate
Core filing	Federal estate tax return if threshold is exceeded	Modelo 650 for mortis causa acquisitions

Why the Spanish region matters

Spanish inheritance tax is one of the areas where autonomous community rules matter most. Regions can grant allowances, reductions and tax credits that dramatically change the answer for close relatives. Andalucia, where Malaga and the Costa del Sol sit, has been politically and commercially attractive partly because close-family inheritance and gift tax relief is generous in many common cases. Madrid also has very favorable close-family relief. Other regions can be less generous or can apply different conditions.

The hard part is not simply asking "which region is cheapest?" It is identifying which region's law applies to the inheritance. The answer can depend on the residence of the deceased, the residence of the heir, the location of Spanish property and EU/non-EU non-resident rules that were reshaped after European case law. A US retiree living in Marbella, a surviving spouse living in Spain and adult children living in California may produce a different analysis from the same assets inherited by a Spanish resident child. Do not assume that buying in Andalucia automatically gives every US heir the best relief in every scenario. Check the connecting factors before relying on the regional benefit.

Spanish assets and US heirs

The most common practical case is simple: American parents retire to Spain, buy a home, and leave everything to children who remain in the United States. The US estate may be below the federal estate tax threshold, but the Spanish property still has to pass through a Spanish process. The heirs will need documents proving death, identity, relationship, title, values, the will or succession title, and tax filing. For Spanish inheritance tax, the relevant form for inheritances is Modelo 650. Non-resident cases can fall through the Spanish Tax Agency's non-resident inheritance and gift tax channel.

There may also be capital gains, local tax and property registry steps around the transfer. Those are separate from inheritance tax, but in practice the family experiences them as one administrative project. If heirs are abroad, powers of attorney, sworn translations, apostilles and coordination with banks become the bottleneck; our process guide on settling a Spanish inheritance from the United States walks through that document sequence. This is why succession planning for a Spain move should happen before the crisis: a clean Spanish will, correct property title, updated beneficiary designations and a simple document trail can save the family months.

Wills, trusts and paperwork

A US will is not automatically useless in Spain, but relying on it alone can make the Spanish process slower and more expensive. Spanish authorities, notaries, banks and registries will need to understand and accept the document. That can require probate evidence, apostilles and sworn translations. Many foreign residents sign a Spanish will limited to Spanish assets, coordinated with the US estate plan, so Spanish property can be handled locally while the US plan continues to govern US assets. The Spanish will must be drafted carefully so it does not revoke the US will by accident.

One document that belongs in this pile and is almost always missing from it is the matrimonial property agreement. For a married couple, what passes on the first death — and what basis it carries afterwards on the American side — is decided by the regime before the will ever speaks. Our page on gananciales and the US step-up in basis sets out why the US and Andalusian incentives here can point in opposite directions.

Trusts deserve special caution. Spain does not treat common-law trusts with the same domestic familiarity as US law. A US revocable living trust may be transparent for US planning yet uncertain or document-heavy in Spain, especially if Spanish real estate, Spanish tax residence or Spanish resident beneficiaries are involved. Before transferring Spanish property into a US trust, get Spain-specific advice. The elegant US probate solution can become an awkward Spanish tax and registry problem if it is imported without adaptation.

The pile is also missing whatever never reaches it. A US will and a US trust are documents families remember; the transfer on death registration on the brokerage account and the payable on death form on the savings account are documents they forget, because those were designed to bypass the estate entirely. They still work after the move — that is the difficulty. They deliver a large sum to a named person immediately, and Spain charges the person who receives rather than the estate that gives, wherever the account happens to sit. See TOD and POD accounts for Americans in Spain. The opposite problem also exists: a Spanish inheritance deed can be complete while a US recorder, broker or transfer agent still requires a separate file for US-situs assets and ancillary probate.

Keep the death documents separate from lifetime incapacity authority. A Spanish will and a US trust help with succession, but neither lets someone operate a Spanish bank account or sign at a notary if you are alive and cannot act. That is the role of a Spanish preventive power of attorney and healthcare-instructions plan, which should be reviewed alongside the estate plan rather than after a health crisis.

Common planning mistakes

The first mistake is thinking the high US estate tax exemption ends the analysis. It may end the federal tax bill, but Spanish inheritance tax and Spanish administration can still exist. The second is assuming "my children live in the US, so Spain cannot tax them." Spain can tax Spanish assets inherited by non-residents, and the filing still matters even when regional relief reduces the amount payable.

The third mistake is ignoring relationship status. Married spouses, registered partners, unmarried partners, stepchildren and friends are not always treated the same. There is a version of this mistake that costs more than any of the others and turns on a single document: if the surviving spouse is not a US citizen, the unlimited federal estate tax marital deduction is denied outright — whether or not the couple ever left the United States — and the statutory way out of that rule requires American residence, which is exactly what moving to Spain gives up. We work it through in your non-citizen spouse, the marital deduction and the move to Spain. A private-client plan that works emotionally may be tax-inefficient if the legal relationship is not aligned. The fourth is mixing US trusts with Spanish assets without checking how Spanish notaries, banks and tax offices will read the structure — and its close cousin, accepting a Spanish lifetime structure without checking how the IRS will read it: the standard advice to gift the bare ownership of a property while keeping the usufruct is valued generously in Spain and may be treated very differently on a US return, as we set out in the nuda propiedad gift and the American donor. A related post-death trap is letting the spouse's legal usufruct sit in the partition without asking whether Spanish law lets the family commute the widow's usufruct into cash, assets or income before the US adviser has priced the form. The fifth is leaving no Spanish paperwork trail: no local will, no inventory, no property values, no powers of attorney, no record of which accounts exist. For lifetime decision-making, that separate layer is covered in our guide to Spanish powers of attorney for incapacity. In a cross-border death, paperwork is not clerical; it is the difference between an orderly inheritance and a frozen file.

Sources reviewed July 2026: IRS estate and gift tax guidance for 2026, including the estate tax filing threshold and basic exclusion amount; BOE consolidated text of Ley 29/1987 del Impuesto sobre Sucesiones y Donaciones; Spanish Tax Agency non-resident inheritance and gift tax pages, including Modelo 650, Modelo 651 and Modelo 655 and competence rules between the State and autonomous communities. General information only, not legal, tax, estate planning or immigration advice. US estate tax, Spanish inheritance tax and regional relief should be confirmed with qualified US and Spanish advisers before acting.