Cross-Border Inheritance in Europe: A Practical Guide for Expats with Assets in Multiple Countries

In brief: Cross-border inheritance in Europe is governed primarily by EU Regulation 650/2012 (Brussels IV) — a framework that quietly determines which country's law applies to your estate, and which authority issues the documents your heirs will need. This guide explains how it works in practice, the role of the European Certificate of Succession, the five real situations expats face, and where the regulation stops helping you. Written for Europeans whose lives — and assets — already span borders.

This article is for general informational purposes only and does not constitute legal, tax, or financial advice. Cross-border succession involves the interaction of multiple legal systems and tax regimes; for your specific situation, consult a notary or lawyer specialised in cross-border succession in your country of residence.

A Family That Did Almost Everything Right

James was 67 when he died at his apartment in Madrid. He had moved to Spain from Manchester twenty-one years earlier, kept his small flat in London for occasional visits, and built a comfortable retirement around the Retiro and his Sunday paella. He had two children — Emma in Paris, Tom in Amsterdam. He had a Spanish will, drafted with a notary in his Salamanca neighbourhood. He thought he had handled it.

Three things he had not anticipated. His Spanish notary processed his Spanish flat in eight weeks, exactly as planned. The London property required a separate UK probate process — eleven months and £14,000 in solicitor fees, because the EU Succession Regulation no longer applies to the United Kingdom. His Spanish bank account had €43,000 in it; releasing the funds to Emma in Paris and Tom in Amsterdam required a European Certificate of Succession, which neither of them had heard of, and which took an additional ten weeks to obtain.

James had done more than most expats. The cross-border layer still cost his children a year of their lives.

This guide is about that cross-border layer. What governs it. What helps. What does not. And where the gaps are that most people only discover when it is far too late.

What "Cross-Border Inheritance" Actually Means in Europe

A cross-border inheritance is any estate where the rules of more than one jurisdiction need to be applied. For expats in Europe, this happens far more often than people expect, usually through one of three patterns.

Pattern 1: Assets in more than one country. A flat in Spain and a house in France. A pension in Germany and a brokerage account in Luxembourg. A property in Portugal and a UK ISA you never closed. The moment your estate contains assets located in more than one country, your heirs face two — sometimes three — sets of procedures.

Pattern 2: Heirs living in more than one country. Even if all your assets are in Spain, an estate with one daughter in London and one son in Berlin is cross-border. The procedures may run in Spain, but the people executing them, paying taxes, and proving their identity are subject to the rules of where they live.

Pattern 3: Habitual residence different from nationality. A British expat in Málaga is, on paper, a UK national. In practice, after fifteen years in Spain, they are habitually resident there — which means Spanish succession law governs their estate by default. This single rule surprises more expats than any other.

Most expats have at least one of these patterns. Many have all three. And almost none of them planned for the consequences.

EU Regulation 650/2012 (Brussels IV): The Framework Most Expats Don't Know They Rely On

EU Regulation 650/2012, often called Brussels IV, is the cornerstone of cross-border succession in the European Union. It came into force on 17 August 2015 and applies to the succession of anyone who dies on or after that date. It has quietly shaped every cross-border estate in the EU since.

Habitual residence vs. nationality: the rule that surprises everyone

Article 21 of the Regulation establishes the default rule: the law of the country where the deceased was habitually resident at the time of death governs the succession of their entire estate. Not nationality. Not where the assets are located. Habitual residence.

For a British expat who has lived in Marbella for the last twelve years, this means Spanish succession law applies — including Spain's forced heirship rules (legítima), which protect children's right to a fixed share of the estate. For a French national who moved to Lisbon eight years ago, Portuguese succession law applies, which has its own forced heirship system (legítima portuguesa) that is similar but not identical to Spain's.

This is rarely what expats expect. Most assume their home country's law follows them. Brussels IV says: it does not, unless you make it.

The "election of law" clause: the one decision that changes everything

Article 22 of the Regulation provides the escape route. You may explicitly elect, in your will, that the law of your country of nationality governs your succession instead of the law of your habitual residence.

This single clause changes outcomes dramatically. A British expat in Spain who elects English law in their will is no longer bound by Spanish forced heirship. They can leave their estate as they wish — to a non-spouse partner, to a charity, to one child rather than equally among all. A French national in Germany who elects French law retains the protections of the réserve héréditaire.

The election must be express, unambiguous, and made in a will or testamentary disposition. A passing reference is not enough. This is the single most important paragraph any cross-border expat will ever sign.

Who Brussels IV applies to — and the exceptions

Brussels IV binds 25 EU member states. Three EU members opted out: Ireland, Denmark, and (during its membership) the United Kingdom. After Brexit, the UK is fully outside the framework. This means:

A British expat in Spain still has Spanish law governing their estate by default (Brussels IV applies in Spain regardless of the deceased's nationality)
However, UK assets — UK bank accounts, UK property — fall outside Brussels IV and are handled under English, Scottish, or Northern Irish law as applicable
Heirs of a British expat in Spain often face proceedings in both jurisdictions, with no automatic recognition between them

This UK exception is the single most common source of cross-border friction for English-speaking expats in 2026.

The European Certificate of Succession: The Tool Most Expats Have Never Heard Of

Articles 62 to 73 of the Regulation create the European Certificate of Succession (ECS) — a document issued by a competent authority (in Spain, by a notary; in Portugal, by a notary or the Conservatória do Registo Civil) that allows heirs, legatees, executors, and administrators to prove their status across all participating EU member states without further legalisation, apostille, or translation.

In practice, the ECS is the document that lets your daughter in Paris withdraw funds from your Spanish bank account, transfer your Lisbon flat into her name, or instruct a German broker to release securities — without re-running the entire probate process in each country.

What you need to know in 2026:

The ECS is issued in the country where the deceased was habitually resident, or where the estate assets are located
Required documents: death certificate (apostilled if foreign), proof of habitual residence, will or declaration of heirs, identification of all heirs, asset inventory
Typical processing time: 4–10 weeks, depending on country and complexity
Validity: 6 months from issue, extendable
Cost: typically €200–€600 in notarial fees, depending on jurisdiction
The ECS has no legal effect outside the EU (or in Ireland, Denmark, or the United Kingdom). For UK or US assets, separate local procedures still apply

For most cross-border expats, obtaining an ECS within the first weeks after death is the single most efficient step their heirs can take.

Five Real Cross-Border Situations Expats Actually Face

Situation 1: Property in two EU countries

You own a flat in Madrid and a house inherited from your parents in the south of France. Both fall under Brussels IV. Your habitual residence determines which national law governs the succession, but each property requires registration in its own land registry under local procedures. An ECS streamlines the recognition; a local notary in each country still handles the formal transfer.

Situation 2: Heirs living in different EU countries

Your son lives in Berlin, your daughter in Amsterdam. The succession proceedings happen where you were habitually resident — say, Spain — but each heir must comply with their own country's reporting obligations on inherited assets. The ECS proves their entitlement in both Germany and the Netherlands without separate legalisation.

Situation 3: Bank accounts and brokerage in third countries

You hold an account at a Luxembourg bank and a brokerage in Switzerland. Brussels IV does not bind Switzerland (which is not in the EU). The Swiss broker will follow its own rules — typically requiring a declaration of inheritance under Swiss private international law. Luxembourg, as an EU member, accepts the ECS. Two different procedures, one estate.

Situation 4: A non-EU spouse or non-EU heirs

Your spouse is American. Brussels IV applies regardless of nationality, but your American heirs will face US tax reporting obligations on the inheritance — including potential FBAR and FATCA filings if foreign account thresholds are met. The succession law and the tax law are different problems; Brussels IV addresses only the first.

Situation 5: Crypto and digital assets across jurisdictions

Your Coinbase account is registered to your Spanish address. Your Ledger hardware wallet sits in a drawer in your Lisbon flat. Your domain name registrar is based in Iceland. None of this is in your will. Brussels IV governs who inherits but says nothing about how to access digital assets — that part is governed entirely by the contract terms of each platform and the practical existence of access information your heirs can find. This is the part that no notary, in any jurisdiction, can solve for you. (See Digital Legacy for Expats in Spain for the practical layer.)

The Tax Trap: Why Brussels IV Doesn't Help You

This is the most consequential misunderstanding in cross-border succession. Brussels IV governs which country's succession law applies. It does not govern which country can tax the inheritance. Tax is outside its scope entirely.

In practice, this means an estate can fall under Spanish succession law and still trigger inheritance tax obligations in three or more countries — depending on where assets are located, where heirs are resident, and (for US citizens) where the deceased was a national.

Bilateral inheritance tax treaties between European countries are surprisingly rare. Spain has only two: with France and Sweden. Portugal has none specific to inheritance tax. Germany has a small network. The UK has treaties with France, Italy, the Netherlands, Sweden, Switzerland, and the United States — but no treaty with Spain.

A real example. A British expat dies in Marbella, leaving an estate of €350,000: a Spanish flat (€220,000), a UK ISA (€80,000), and bank balances in both countries. Heirs are his two children, both UK residents.

Spanish inheritance tax applies to the Spanish flat and Spanish bank balance, with the regional rates of Andalusia (after the Andalusian reform, often near zero for direct heirs)
UK inheritance tax (IHT) applies to the worldwide estate of a UK-domiciled person, potentially capturing the full €350,000 above the nil-rate band of £325,000
No bilateral treaty between Spain and the UK on inheritance tax — relief depends on unilateral mechanisms in each country

The result: heirs may legally owe tax in two countries with limited offset. Coordinated advice from a Spanish asesor fiscal and a UK STEP-qualified solicitor is the only safe path.

Five Mistakes Expats Make in Cross-Border Succession

Assuming your home-country will is enough. It is sometimes valid, but processing it abroad requires apostille, certified translation, and weeks of additional procedures. A locally drafted will in your country of habitual residence almost always saves time and money.

Forgetting the Article 22 election. Without an explicit choice of law in your will, the law of your habitual residence applies by default — which may impose forced heirship rules you do not want.

Treating tax and succession as the same problem. They are not. Brussels IV solves the legal succession question. The tax question requires separate planning, country by country.

Letting the UK exception become a surprise. UK assets do not benefit from the ECS. Plan for parallel UK and EU procedures from the start.

Ignoring digital and undocumented assets. Brussels IV cannot deliver passwords, seed phrases, or platform access. These need a separate, intentional system.

How Sucesio Fits Into Cross-Border Estate Planning

Sucesio is built for the layer of estate planning that operates across the legal procedures, not inside them. Your Spanish notary handles your Spanish will. Your UK solicitor handles your UK probate. Your German Notar handles your German assets. Each does their part — within their own jurisdiction, in their own legal language, on their own timeline.

What none of them does is centralise the practical information your heirs will need across all three. That is where Sucesio fits.

In a single encrypted vault, you organise:

A complete inventory of all your assets, with their location and current professional contacts (notary in Spain, solicitor in UK, accountant in Portugal)
Access information for digital accounts, crypto wallets, and online businesses
Copies and references for key documents — your Spanish will, your UK will, your NIE, your insurance policies
Personal messages for your heirs, delivered at the moments you choose
Instructions for what to do in the first weeks: which professional to contact in which country, in what order

While you are alive, nothing is transmitted. Sucesio uses a periodic check-in system. After your death is confirmed by a designated trusted person, the structured information is released to the people you specified — exactly as you intended.

For cross-border expat families, this is the layer that turns three uncoordinated probate processes into a single, navigable plan. All data is encrypted with AES-256, hosted in Europe (Ireland), and GDPR-compliant.

A Step-by-Step Cross-Border Preparation Plan

Step 1 — Map your jurisdictions. List every country where you hold assets, are tax resident, or have heirs. Most expats find at least three.

Step 2 — Make a will in your country of habitual residence. Drafted with a local notary, registered in the national will registry where one exists. This is the foundation.

Step 3 — Decide whether to elect your home-country law (Article 22). Discuss with your notary. The right answer is situation-specific — it usually depends on your forced heirship preferences and tax exposure.

Step 4 — Maintain a parallel will for non-EU jurisdictions if needed. UK, US, Switzerland — separate documents, drafted to be consistent with your EU will, never contradicting.

Step 5 — Document your asset inventory across countries. Update annually. Keep professional contacts (notaries, solicitors, accountants) on the same document.

Step 6 — Plan for the European Certificate of Succession. Make sure your designated heirs know what it is and where to apply for it.

Step 7 — Add the digital and personal layer. A vault that operates across borders for the assets and messages no notary can carry.

Frequently Asked Questions

Does EU Regulation 650/2012 apply if I live in the UK? No. The United Kingdom did not opt into Brussels IV before Brexit and is now fully outside the EU. UK succession law continues to apply to UK assets and UK-domiciled deceased persons. However, if you are habitually resident in an EU country (e.g. Spain), Brussels IV applies to your estate located in that country regardless of your UK nationality.

Can my heirs use the European Certificate of Succession in non-EU countries? No. The ECS is an EU instrument valid only in the 25 participating member states. For assets in the UK, US, Switzerland, or any other non-EU country, separate local probate procedures are required. Heirs of cross-border expats often need both an ECS (for EU assets) and local certificates (for non-EU assets).

What happens if I die in a country where I am not habitually resident? Brussels IV is concerned with habitual residence, not the location of death. If you die during a holiday in Italy but habitually reside in Spain, Spanish law governs your succession. The country of death has no special role beyond issuing the death certificate.

Do I need a separate will in each EU country where I have assets? Not necessarily. A single will, drafted in your country of habitual residence, can cover all your EU assets and is recognised across the Union. However, for non-EU assets (UK, US), a separate locally drafted will is often simpler and faster to probate. Always coordinate cross-border wills with specialists in each jurisdiction to avoid contradictions.

How does cross-border inheritance interact with cryptocurrency? Brussels IV applies to crypto held by an EU-resident expat just as it does to any other movable asset — the law of habitual residence governs the succession. The practical access problem (private keys, exchange credentials, hardware wallets) is governed by platform contracts and the existence of documented access information, not by succession law. See Crypto Inheritance for Expats in Europe for the access layer.

What is the typical timeline for cross-border probate in 2026? For a single-EU-country estate with a clean will and no disputes: 3–6 months. With an ECS required: add 1–2 months. With a UK component: add 8–12 months for parallel UK probate. With heirs in three countries and assets across two systems: 12–18 months is realistic. Planning ahead — wills, asset inventory, designated points of contact — is the single biggest factor in compressing this timeline.

This article is for general informational purposes only and does not constitute legal, tax, or financial advice. Cross-border succession involves the interplay of multiple legal and tax systems, and outcomes depend heavily on your specific circumstances. For any decision regarding your estate, please consult a notary or lawyer specialised in cross-border succession in your country of residence — and, where tax is involved, a qualified tax adviser in each jurisdiction concerned.