Estate Planning for American Expats in Spain: The Complete US-Spain Guide (2026)
IN 30 SECONDS
- The United States taxes its citizens on worldwide income and assets regardless of where they live. You do not leave US tax obligations behind when you move to Spain — and that includes estate tax.
- EU Regulation 650/2012 (Brussels IV) does not apply to US citizens. Unlike EU-national expats in Spain, Americans cannot elect the law of their nationality to govern their Spanish succession under EU treaty rules.
- The US-Spain tax treaty (1990) covers income taxes, not inheritance. There is no bilateral estate and inheritance tax treaty between the US and Spain — meaning double taxation on the same assets is a real risk.
- FBAR and FATCA obligations do not end at death: your heirs inheriting Spanish bank accounts, Spanish property, or crypto may face reporting requirements of their own.
- A Spanish notarial will is essential for any American owning assets in Spain — but it will not transmit your digital assets, crypto seed phrases, or online account access.
Americans are, by most measures, the most tax-burdened expatriates in the world. The United States is one of only two countries — the other is Eritrea — that taxes its citizens on worldwide income and assets regardless of where they physically reside. For Americans living in Spain, this creates an estate planning challenge that simply does not exist for European expats in the same situation.
A French national moving to Spain can elect French law in their Spanish will under EU Regulation 650/2012. A German national can structure their estate around a single, coherent legal framework spanning two EU member states. An American national cannot. The US is not an EU member. The US-Spain tax treaty does not cover inheritance. There is no bilateral estate and succession tax treaty between the two countries. And the IRS follows your estate — and potentially your heirs — across borders and across generations.
Approximately 40,000 American citizens are registered as residents in Spain, concentrated in Madrid, Barcelona, Seville, the Costa del Sol, and the Balearic Islands. The true number, including Americans on long-stay visas, digital nomads, and those not formally registered, is considerably higher. Most of them have an estate plan designed for a domestic American life — and a rapidly growing Spanish asset base that it does not cover.
This guide maps the specific legal and tax terrain that American expats in Spain must navigate in 2026. It is not a substitute for professional advice, but it is a map of the terrain.
Section 1: The US-Spain Double Challenge — Two Legal Systems, Two Tax Systems
Most expats in Spain face a cross-border estate planning challenge. American expats face two of them simultaneously, and the two interact in ways that are not always predictable.
On the US side, the federal government taxes your worldwide estate at death through the federal estate tax (IRC §2001 et seq.), regardless of where you were living. The current federal estate tax exemption for 2026 is relevant here: under the Tax Cuts and Jobs Act (TCJA), the exemption was roughly doubled in 2018. However, unless Congress acts, the TCJA provisions sunset at the end of 2025, reducing the exemption back to approximately $7 million per individual (adjusted for inflation from the pre-2018 level of $5 million). For 2026, you should verify the current federal estate tax exemption with a US tax advisor, as the legislative landscape is in flux. Above the applicable exemption, the federal estate tax rate is 40%.
On the Spanish side, Spain's Impuesto sobre Sucesiones y Donaciones (ISD) applies to assets located in Spain regardless of the deceased's nationality. Your heirs must file Spanish succession tax on your Spanish property, Spanish bank accounts, and other Spanish-sited assets. ISD rates and exemptions vary significantly by autonomous community — from near-zero in Andalucía and Madrid to substantially higher in Catalonia.
The interaction problem: Unlike European nationals in Spain, Americans cannot rely on a bilateral estate and inheritance tax treaty to prevent their heirs from being taxed on the same assets in both countries. The US-Spain treaty that exists covers income taxes, not succession. Without a treaty, careful structural planning is the only tool available.
Section 2: EU Regulation 650/2012 and Americans — The Rule That Does Not Apply to You
EU Regulation 650/2012, commonly known as Brussels IV, is the EU framework that governs cross-border succession for residents of EU member states. For EU nationals living in another EU country — a French citizen living in Spain, a Dutch citizen living in Portugal — it creates a powerful tool: the ability to elect the law of your nationality to govern your entire succession by including a professio iuris clause in your will.
For Americans in Spain, Brussels IV is largely irrelevant. The United States is not an EU member state. American nationals do not have the right to elect US law as the governing law of their Spanish succession under Brussels IV. Spanish courts may, under Spanish private international law rules, give effect to certain choices of law in a will — but this is a discretionary practical outcome, not a treaty right, and it applies only in specific circumstances.
What this means in practice:
| EU national in Spain | American in Spain |
|---|---|
| Can elect home country law under Brussels IV | Cannot elect US law under EU treaty mechanism |
| Law election recognised across all EU member states as a treaty right | Any law election is subject to Spanish court discretion |
| Succession governed by a coherent EU framework | Succession governed by Spanish domestic private international law rules |
| Less risk of assets being subject to unexpected succession laws | Must ensure Spanish will explicitly addresses governing law |
The practical implication: Americans in Spain have less legal certainty about how their succession will be handled than EU nationals in the same position. This makes a well-drafted Spanish notarial will — with explicit instructions and, where possible, a law election clause — even more important. See making a will in Spain as a foreigner for the procedural detail.
It also means you cannot rely on a US will to govern your Spanish assets. A US will, even one that says "all my property worldwide," does not govern Spanish real estate under Spanish law. Spanish property follows Spanish succession rules unless a valid Spanish will directs otherwise.
Section 3: US Estate Tax vs Spanish Succession Tax (ISD) — Who Pays What
Understanding the two tax systems separately is the foundation of cross-border planning.
The US Federal Estate Tax
The federal estate tax applies to the worldwide estate of US citizens — whether they live in Kansas or the Costa del Sol. The estate includes:
- All US-sited assets (US real estate, US bank accounts, US brokerage accounts, US retirement accounts)
- All foreign-sited assets (Spanish property, Spanish bank accounts, Spanish investments, crypto held anywhere)
Key thresholds and rates (2026):
| Item | Detail |
|---|---|
| Federal estate tax exemption | Confirm current amount — subject to TCJA sunset |
| Rate above exemption | 40% |
| Marital deduction | Unlimited for US citizen spouses; restricted for non-citizen spouses |
| Foreign tax credit | Available for foreign death taxes paid on foreign-sited assets (IRC §2014) |
| Filing requirement | Form 706 for estates exceeding the filing threshold |
The foreign tax credit (IRC §2014) is the primary US mechanism for avoiding double taxation when no bilateral treaty exists. If your heirs pay Spanish ISD on your Spanish property, the estate may be entitled to a credit against US estate tax for the Spanish taxes paid on those same assets. This credit is subject to complex rules and limitations — it is not automatic and must be calculated correctly on Form 706.
State estate taxes: Several US states impose their own estate tax with lower exemptions than the federal level. If you were domiciled in New York, Massachusetts, Oregon, or Washington State before moving to Spain, your state of domicile may still claim state-level estate tax on your worldwide estate. This is a further layer that many Americans abroad do not realise applies to them.
Spanish Succession Tax (ISD)
Spain's Spanish succession tax applies to assets located in Spain, regardless of the deceased's tax residency or nationality. Key points for Americans:
| Factor | Detail |
|---|---|
| What is taxed | Spanish-sited assets: real estate, Spanish bank accounts, Spanish investments |
| Who pays | The heirs (not the estate — unlike the US estate tax) |
| Filing deadline | 6 months from date of death (extendable by a further 6 months on request) |
| Rate and exemptions | Vary by autonomous community — from near-zero in Andalucía and Madrid to higher in Catalonia |
| Non-resident heirs | Subject to the national ISD schedule if the heir is not a Spanish resident |
The non-resident heir problem: If your heirs are based in the US (as many American expats' heirs are), they fall under the national ISD schedule rather than a regional one. The regional schedules — particularly in Andalucía and Madrid — are significantly more generous. Until a 2014 European Court of Justice ruling and subsequent Spanish legislative changes, non-EU heirs could not access regional ISD bonuses. The current position allows heirs to use regional rules in the region where the asset is located, but you should verify the current rule with a Spanish tax advisor given ongoing legislative developments.
A practical example:
Susan is a US citizen living in Seville (Andalucía). She owns a Spanish apartment worth €450,000 and a Spanish bank account with €80,000. Her US estate (US brokerage accounts, US home) is worth $1.2 million. Her sole heir is her adult daughter, Emma, a US citizen living in New York.
- Spanish ISD: Emma, as heir to Spanish assets, files ISD in Andalucía. Andalucía currently provides near-100% reduction for direct heirs. Spanish ISD liability is minimal.
- US estate tax: The entire worldwide estate — the Spanish apartment, the Spanish bank account, the US brokerage, the US home — is included. Susan's total estate (US assets plus Spanish assets converted at exchange rate) is approximately $1.85 million. Against the federal exemption, if the TCJA sunset has taken effect and the exemption is approximately $7 million, there is no federal estate tax in this scenario. But if Susan's total estate were larger, or if her state of prior domicile also taxes the estate, the picture changes materially.
- The interaction: Even though Spanish ISD is minimal here, the Spanish assets are still included in the US estate tax calculation. The IRC §2014 foreign tax credit for Spanish taxes paid would be applied — but if Spanish ISD is effectively zero, the credit is also zero.
Section 4: The US-Spain Tax Treaty — Does It Cover Inheritance?
The short answer: no, not directly.
The US and Spain signed a Convention for the Avoidance of Double Taxation and the Prevention of Fiscal Evasion with respect to taxes on income (signed 22 February 1990, entered into force 21 November 1990). This is an income tax treaty. It covers, among other things, dividends, interest, royalties, capital gains, and pension income flowing between the two countries. It provides mechanisms for avoiding double income taxation and resolves certain conflicts between the two tax systems.
It does not cover estate and inheritance taxes.
There is no bilateral US-Spain estate and inheritance tax treaty. The United States has estate tax treaties with a relatively small number of countries — including Australia, the UK, Germany, France, and others — but Spain is not among them. This is not an oversight; it reflects the fact that estate tax treaties are rare and difficult to negotiate.
| What the 1990 US-Spain income tax treaty covers | What it does NOT cover |
|---|---|
| Income from US or Spanish sources | Estate tax |
| Dividends and interest | Inheritance tax (ISD) |
| Royalties | Succession to property |
| Capital gains | Double taxation on estates |
| Pensions and retirement income | FBAR or FATCA obligations |
| Tax residency tie-breaker rules |
The income treaty's relevance to estate planning: The 1990 treaty does affect some estate-adjacent issues. It governs how income generated by estate assets during probate is taxed. It affects how US-sited assets generating income (dividends from US stocks, rental income from US property) are taxed for your Spanish-resident heirs in the period after your death. The tie-breaker provisions also matter for determining your tax residency status — relevant to the IRS's ongoing compliance requirements while you are alive.
But the fundamental double taxation risk on your estate — Spanish ISD on your Spanish assets and US estate tax on the same assets counted in your worldwide estate — cannot be eliminated by treaty. The only tool is the IRC §2014 foreign tax credit, structural planning, and, where applicable, lifetime gifting strategies.
Section 5: FBAR and FATCA — Compliance Obligations That Do Not End at Death
FBAR and FATCA are two of the most consequential compliance obligations for American expats — and most people do not realise they have implications for their heirs.
FBAR (FinCEN Form 114 — Report of Foreign Bank and Financial Accounts)
Under the Bank Secrecy Act (31 U.S.C. §5314), any US person who has a financial interest in, or signature authority over, foreign financial accounts with an aggregate value exceeding $10,000 at any point during the calendar year must file an FBAR. Spanish bank accounts, Spanish brokerage accounts, and certain Spanish financial instruments are all reportable.
For American expats in Spain, FBAR is an annual obligation. Penalties for non-compliance are severe: up to $10,000 per non-willful violation per account per year, and up to the greater of $100,000 or 50% of the account balance per willful violation per account per year.
FBAR implications for heirs: When a US person dies with Spanish bank accounts, the estate's administrator (executor) has FBAR reporting obligations for any accounts over which they have signature authority during administration. If the heir is also a US person and inherits a Spanish bank account that exceeds the $10,000 threshold, they immediately inherit both the asset and the FBAR reporting obligation. Many American heirs who inherit Spanish assets from American expat parents are unaware of this. The account can be simple to inherit under Spanish succession law — and then create years of FBAR compliance obligations for the US-citizen heir.
FATCA (Foreign Account Tax Compliance Act — IRC §6038D)
FATCA, enacted in 2010, requires US persons to report foreign financial assets on Form 8938 if they exceed certain thresholds (broadly, $50,000 for US residents; $200,000 for US persons living abroad). Spanish bank accounts and Spanish financial assets held by American expats are typically FATCA-reportable.
FATCA also requires foreign financial institutions — including Spanish banks — to report accounts held by US persons to the IRS. This means that, in many cases, the IRS already has information about your Spanish bank accounts through the US-Spain FATCA intergovernmental agreement (signed 2013).
FATCA and the estate: During probate, a US executor administering an estate with Spanish assets may have FATCA reporting obligations on Form 8938 for the estate's foreign assets. Once assets are distributed, US-citizen heirs who receive Spanish financial accounts above the FATCA threshold must themselves report on Form 8938.
Practical implication for estate planning: If you intend to leave Spanish bank accounts or Spanish financial assets to US-citizen heirs, incorporate FBAR and FATCA compliance guidance into your estate planning documentation. Your heirs should know immediately that inheriting a Spanish account is not purely a simple inheritance — it comes with US federal reporting obligations that begin from the moment they have a financial interest in the account.
Section 6: Making a Will in Spain as a US Citizen — Do You Need a Spanish Will?
Yes. If you own assets in Spain, you need a Spanish will.
A US will, even a comprehensive one, does not govern Spanish real estate under Spanish law. Spanish property is subject to Spanish succession law and must be transferred through Spanish probate procedures (adjudicación de herencia). Without a Spanish notarial will, your Spanish assets will be distributed according to Spanish intestacy rules — which may not reflect your wishes and which operate differently from US intestacy laws.
For a full procedural overview, see estate planning for expats in Spain, which covers the Spanish will process in detail.
What Your Spanish Will Should Include
A Spanish notarial will (testamento notarial) for an American expat in Spain should:
| Element | Why It Matters |
|---|---|
| Cover all Spanish-sited assets explicitly | Spanish property, bank accounts, vehicles, personal property in Spain |
| Identify beneficiaries clearly | Name, relationship, nationality, and address of each heir |
| Address the governing law question | While Brussels IV does not give Americans a treaty right to elect US law, a carefully drafted clause can request Spanish courts to apply your home state's succession law where not contrary to Spanish public order |
| Explicitly exclude non-Spanish assets | The Spanish will should not purport to govern your US estate, which is covered by your US will |
| Be registered in Spain | Filed with the Registro General de Actos de Última Voluntad (Ministry of Justice) |
| Be drafted by a qualified cross-border notario or abogado | Given the US-Spanish complexity, a notario with cross-border experience is advisable |
Do You Also Need a Separate US Will?
Yes. The dual-will approach — one Spanish will for Spanish assets, one US will (or trust) for US assets — is the standard recommendation for Americans in Spain. Each will must be explicitly scoped to exclude the other's jurisdiction to avoid ambiguity.
Many American expats also benefit from a revocable living trust structure in the US (governed by the law of their home state) to avoid US probate for their US assets. A living trust does not eliminate the US estate tax — trust assets are included in the taxable estate — but it simplifies administration and avoids the public probate process. Whether a living trust makes sense depends on your specific US asset profile and home state.
Section 7: Digital Assets — Crypto and Online Accounts Under US and Spanish Law
The digital estate of a typical American expat in Spain in 2026 may include:
- Cryptocurrency held on US exchanges (Coinbase, Kraken) or in self-custody (hardware wallets, MetaMask)
- Cryptocurrency held on Spanish or EU exchanges
- US brokerage accounts accessible only via online credentials (Schwab, Fidelity, Vanguard)
- US bank accounts accessible online (Chase, Bank of America)
- Spanish bank accounts accessible via online banking
- PayPal, Venmo, Wise, Revolut balances
- Decades of photos, documents, and personal memories in cloud storage (iCloud, Google Drive, Dropbox)
The legal framework exists. The practical transmission does not.
Your Spanish notarial will can name a beneficiary for your cryptocurrency held in Spain. Your US will or trust can name a beneficiary for your Coinbase account. Neither document can transfer the private key, the seed phrase, or the online login credentials. Your US executor and your Spanish heirs cannot access accounts without credentials — and those credentials are not in any legal document.
The FBAR complication with crypto: The IRS and FinCEN have taken evolving positions on whether cryptocurrency held on foreign exchanges is reportable on FBAR. As of 2026, you should confirm current FinCEN guidance with a US tax advisor. If your cryptocurrency is reportable as a foreign financial account, your heirs may inherit a FBAR obligation along with the crypto itself.
Spanish crypto succession law: Spain does not have a specific crypto inheritance statute. Cryptocurrency is treated as a digital asset subject to the same general succession rules as other property. Your Spanish will should explicitly reference your cryptocurrency holdings (by type, platform, and general description — not the seed phrase itself, which should never appear in a public document).
This is precisely the gap that Sucesio addresses: storing the access credentials, seed phrases, platform locations, and instructions that legal documents cannot carry — and transmitting them securely to your designated heirs after death is verified.
Section 8: Practical Steps — What American Expats in Spain Should Do Now
Legal Documents
- Spanish notarial will — executed before a Spanish notario, covering Spanish-sited assets, explicitly excluding US assets, and registered with the Registro General de Actos de Última Voluntad
- US will (or revocable living trust) — covering US-sited assets, explicitly excluding Spanish assets, naming a US executor or successor trustee
- IRA / 401(k) / life insurance beneficiary designations — these pass outside the will; review designations to ensure they align with your overall estate plan
- Spanish power of attorney (poder notarial) — grants authority to act in Spain if incapacitated; essential for managing Spanish assets if you become ill
- US durable power of attorney — for management of US financial affairs if incapacitated
Tax and Compliance
- Annual FBAR filing (FinCEN Form 114) — if aggregate foreign accounts exceed $10,000 at any point during the year
- Annual FATCA reporting (Form 8938) — if foreign financial assets exceed applicable thresholds (higher for those living abroad)
- US estate tax modelling — model your worldwide estate against the current federal estate tax exemption; determine whether state-level estate tax also applies
- IRC §2014 foreign tax credit strategy — ensure your estate plan is structured so heirs can claim the credit for Spanish ISD paid on Spanish assets against US estate tax
- Spanish tax residency and IRPF — confirm your Spanish income tax obligations; the US-Spain income treaty determines how US-source income (dividends, US pensions, Social Security) is taxed in Spain
Practical Steps
- Designate a qualified advisor in each jurisdiction — a US estate attorney experienced in expatriate estates and a Spanish abogado or notario with cross-border succession experience; ideally advisors who communicate with each other
- Prepare a complete asset inventory — all US and Spanish assets, account numbers, institutions, and approximate values; store it somewhere your heirs can access it
- Brief your heirs on the 6-month Spanish ISD deadline — Spanish inheritance tax must be filed within 6 months of death; US-based heirs are consistently unprepared for this
- Document your digital assets separately — credentials, seed phrases, platform locations, and access instructions should be stored in a secure vault (Sucesio), not in a public legal document and not on a Post-it note
- Review triggers — revisit your plan after any major life event: acquisition of new Spanish property, marriage, divorce, birth of a child, significant change in asset values, or material changes in US or Spanish tax law
Frequently Asked Questions
1. Does the US-Spain tax treaty protect me from double inheritance taxation?
No. The 1990 US-Spain treaty covers income taxes, not estate or inheritance taxes. There is no bilateral estate and inheritance tax treaty between the US and Spain. The primary mechanism for avoiding double taxation on your estate is the IRC §2014 foreign tax credit, which allows the estate to credit Spanish ISD paid on Spanish assets against US estate tax on the same assets. This credit has specific rules and limitations — it must be claimed correctly on Form 706 and requires coordination between your US and Spanish advisors.
2. My heirs are US citizens living in the US. Do they have to file anything with the IRS after inheriting my Spanish accounts?
Potentially yes. If your US-citizen heirs inherit Spanish bank accounts with a balance exceeding $10,000 (aggregate of all foreign accounts), they will have FBAR filing obligations for any year in which they hold those accounts. If the accounts exceed FATCA thresholds (broadly $50,000 for US residents), they will also have Form 8938 reporting obligations. These obligations begin from the moment they have a financial interest in the accounts — which may be during the Spanish probate period, before the accounts are formally distributed. Your estate planning should include clear instructions for your heirs on these obligations.
3. Can I elect US law to govern my Spanish succession?
Not as a treaty right under EU Regulation 650/2012, which does not apply to US citizens. However, a carefully drafted Spanish will may include a request that Spanish courts apply the succession law of your home state where compatible with Spanish public order rules. In practice, Spanish courts may or may not give effect to such a request depending on the specific legal question. Do not assume that a clause in your Spanish will will automatically result in your home state's succession law governing your Spanish estate. The safer approach is to structure your Spanish will so that it effectively works under both Spanish law and your home state's law, with specialist input from a cross-border succession lawyer.
4. What happens to my IRA or 401(k) when I die as a Spanish resident?
US retirement accounts (IRAs, 401(k)s) are US-sited assets governed by US law. They pass to your named beneficiaries (or your estate if no beneficiary is named) under US rules. Distributions from inherited IRAs to US-citizen beneficiaries are taxed as income in the US. If your beneficiaries are Spanish residents, the Spain-US income tax treaty and Spanish IRPF rules will affect the tax treatment of distributions. Crucially, your IRA and 401(k) are included in your worldwide estate for US estate tax purposes. There is no special treatment for expats — the same rules that apply to Americans living in the US apply to Americans living in Spain.
5. I own crypto. How do I make sure my heirs can access it after I die?
Your Spanish will and US will can name beneficiaries for your cryptocurrency holdings — describing them by type and platform. But the legal documents cannot transfer the access credentials: the seed phrase for a hardware wallet, the private key for a self-custody wallet, or the login credentials for an exchange account. Without these, your heirs may inherit a legal right to your crypto with no practical way to access it. The solution is a secure, separately stored record of this information — a digital vault like Sucesio — that releases access credentials to your heirs after death is verified. Never include seed phrases or private keys in a will (which becomes a public document through probate) or in an email.
Conclusion
American expats in Spain face a genuinely distinctive estate planning challenge. Citizenship-based taxation, the absence of a bilateral estate tax treaty, no Brussels IV protection, FBAR and FATCA compliance obligations that extend to heirs — the combination of these factors makes estate planning for US citizens in Spain materially more complex than for any other nationality group living in the country.
The answer is not paralysis. It is a structured, cross-border estate plan: a Spanish notarial will for Spanish assets, a US will or living trust for US assets, annual FBAR and FATCA compliance, an IRC §2014 foreign tax credit strategy, and a clear asset inventory your heirs can actually use. And it is advisors — qualified, specialist, and communicating with each other — in both countries.
The legal and financial plan is the foundation. But every American expat in Spain also has a digital life that legal documents cannot fully reach: online banking credentials, crypto seed phrases, US brokerage account logins, and Spanish account access. These practical elements are the final piece — and the one most often missing.
Sucesio helps American expats in Spain organise both sides of their estate — from their Spanish property to their US accounts and digital assets. See how it works →
Published: 2026. References: Internal Revenue Code (IRC) §2001 et seq. · US-Spain Tax Treaty (1990) · Regulation (EU) No 650/2012 · Ley 29/1987 ISD · Bank Secrecy Act (FBAR, 31 U.S.C. §5314) · FATCA (IRC §6038D). This article is for informational purposes only and does not constitute legal, tax, or financial advice. Consult both a US tax attorney and a Spanish advisor for your situation.