Cross-Border Inheritance for Expats in Luxembourg: The 2026 Guide
In short: Luxembourg is the most international country in Europe — nearly half its residents are foreign nationals, and tens of thousands of frontaliers cross in daily from France, Belgium and Germany. That makes the average estate here genuinely cross-border: assets, heirs and residence spread across several jurisdictions at once. Luxembourg law reserves shares for close family (réserve héréditaire), EU Regulation 650/2012 decides which country's law governs the whole succession, and inheritance duties turn on the family relationship. With a deliberate will, a choice-of-law election, and an organised record of where everything is, you can keep a complex estate from becoming an ordeal.
The most international estate in Europe
Picture a Portuguese engineer who has spent fifteen years in Luxembourg City, a British banker with a flat in Kirchberg and family in London, or a Belgian frontalier who lives in Arlon and works in the Grand Duchy. Each has built a life that straddles borders — and an estate that does the same: a Luxembourg salary and pension, a home in one country, accounts in another, investments spread across the eurozone, perhaps a crypto wallet no institution knows exists.
This is the defining feature of estate planning in Luxembourg: almost nobody's affairs stay within one border. When someone dies, the estate does not pass through a single tidy system. It meets Luxembourg succession law, the law of the heirs' countries, multiple tax authorities, and a family that may be scattered across three nations. The value is real; the risk is that it becomes unreachable, or distributed in a way no one intended, at the worst possible moment.
None of this is cause for alarm. It is a reason to organise things now, calmly, while you can make the choices yourself.
What the law actually says
EU Regulation 650/2012 applies in Luxembourg in full
Luxembourg is fully bound by EU Regulation 650/2012 (Brussels IV). Its default rule: the law of the country where you are habitually resident at death governs your entire succession, worldwide. Live genuinely in Luxembourg, and Luxembourg succession law applies to your whole estate by default — including assets held in France, Belgium, Germany or beyond. We cover the framework in depth in our guide to EU Regulation 650/2012 for expats.
For the frontalier, the residence question is sharper than it looks. If you live in Belgium or France and only work in Luxembourg, your habitual residence — and therefore the default succession law — is likely your country of residence, not the Grand Duchy. Getting this determination right is foundational, because everything else follows from it.
The choice-of-law election is your key lever
Article 22 of the Regulation lets you choose the law of your nationality to govern your succession, overriding the habitual-residence default. A foreign national resident in Luxembourg can elect their home-country law; a frontalier can plan around the interaction of two systems. For internationally mobile people, this election is usually the centrepiece of a sound plan — and it must be written explicitly into a valid will, because silence means the default applies.
Forced heirship: the réserve héréditaire
Luxembourg, like its civil-law neighbours, protects certain heirs through the réserve héréditaire. Descendants are reserved heirs, entitled to a fixed share of the estate that the deceased cannot freely give away; the remainder (the quotité disponible) can be left as the person chooses. The proportions depend on the number of children. If your home country grants greater freedom of disposition — or simply different shares — the Article 22 election is how you keep your intended distribution intact.
Inheritance duties in Luxembourg
Luxembourg levies inheritance duties (droits de succession) whose rate depends heavily on the relationship between the deceased and the heir and on whether assets pass in the direct line. In broad terms, transfers between spouses with common children, and inheritance in the direct line up to the reserved share, are treated most favourably, while more distant heirs face higher rates. Real property located abroad and the precise family situation change the picture significantly. This is jurisdiction-specific detail for a Luxembourg notaire and a tax adviser — not something to assume from a summary.
The classic mistakes cross-border residents make
The first is misjudging habitual residence — especially frontaliers who assume Luxembourg law governs their estate when their country of residence may.
The second is leaving the choice-of-law election unwritten, letting the default silently override a home-country plan.
The third is conflicting wills across countries that revoke one another by accident; coordination by a professional is essential.
The fourth — and the one that has nothing to do with law — is the invisible estate. Accounts in several countries, a Luxembourg pension, brokerage logins, a crypto wallet, the password to the family archive. No probate court can distribute what heirs cannot find, and families spread across borders can lose months tracing it all. See our guides to crypto inheritance for expats and personal legacy for expats for the digital and non-legal layers.
How Sucesio complements your will
Sucesio does not replace your will, your Luxembourg notaire or your tax adviser. It complements them by being the one organised place that ties a multi-jurisdiction estate together — so your heirs do not need to reconstruct your financial life from scratch, in several countries, after a death.
Inside your Sucesio vault you can organise, in one calm place:
- Physical assets — property in Luxembourg and abroad, valuables, vehicles — with pointers to deeds and registrations.
- Digital and financial assets — accounts across jurisdictions, brokerage and crypto holdings (with secure access hints, never raw keys or passwords), and online accounts.
- Business and contracts — corporate documents, insurance, pension arrangements.
- Personal, non-legal legacy — the letters, instructions and memories you want specific people to receive.
When the time comes, the right people receive exactly what you chose, securely and automatically. Heirs do not search. They find.
A note for private banking and family offices
Luxembourg's private banks and family offices serve exactly the internationally mobile clients described here — and the estate-location gap is a shared problem: the adviser's client, the notaire's file, and the family's inheritance all at once. Firms that want to offer cross-border clients an organised, secure way to close that gap can treat Sucesio as a complement to their existing service. We explore this further in our guide for advisers on cross-border succession for expat clients.
A step-by-step plan
Start by determining habitual residence honestly — especially if you are a frontalier. Then decide, with a cross-border lawyer, whether to elect your home-country law under Article 22 and have that clause drafted. Coordinate your wills across countries so none cancels another. Map your estate end to end — property, accounts, pensions, digital and crypto holdings across every jurisdiction — and organise access and instructions in Sucesio, separating the legal "who inherits" from the practical "how do they reach it." Finally, review every two to three years or after any move, purchase, marriage or birth.
FAQ
Q: I live in Belgium and work in Luxembourg. Which country's inheritance law applies? A: Under EU Regulation 650/2012, the default is the law of your country of habitual residence — which, if you live in Belgium, is likely Belgian law, not Luxembourg's. You can elect your nationality's law under Article 22. Getting the residence determination right is the essential first step.
Q: Can I avoid Luxembourg's forced heirship? A: If you are a foreign national, you can elect the law of your nationality under Article 22, which may grant greater freedom of disposition than the Luxembourg réserve héréditaire. The election must be explicit in your will.
Q: How much inheritance duty will my heirs pay in Luxembourg? A: It depends heavily on the heir's relationship to you and whether assets pass in the direct line, with spouses and direct-line heirs treated most favourably. Foreign real property and your exact family situation change the outcome — a Luxembourg notaire and tax adviser should assess it.
Q: Does the choice-of-law election change the tax? A: No. Article 22 governs how your estate is divided, not which country taxes it. Distribution and taxation are separate questions.
Q: What happens to my accounts and crypto spread across several countries? A: Nothing automatic — that's the risk. Wills and probate don't recover logins or locate scattered accounts. Sucesio lets you organise secure access hints and a map of the whole estate so your heirs can reach it without you exposing credentials in a legal document.
This article is provided for informational purposes only and does not constitute legal, tax or financial advice. For any decision regarding your estate, consult a qualified notary or lawyer in your country of residence. Sucesio is a complement to a traditional will, not a replacement for one.
— The Sucesio Team