Estate Planning for Belgian Expats in Spain: The 2026 Guide

Belgium is a small country — roughly 11 million people — but it punches above its weight in European expat statistics. An estimated 15,000 to 20,000 Belgian nationals are registered residents in Spain, concentrated along the Costa del Sol, the Costa Blanca around Alicante, and in Barcelona. The real figure, including those who have not formally registered, is likely higher.

What makes Belgian expats distinctive from an estate planning perspective is not their numbers but their legal complexity. Belgium is a federal state unlike any other in the EU, and this federalism extends directly into inheritance tax. Three different regional governments — Flanders (Vlaanderen), Wallonia (Wallonie), and Brussels-Capital Region — each operate their own inheritance tax regime, with different rates, allowances, and rules. A Belgian national in Spain who elects Belgian law must understand not just “Belgian inheritance tax” but specifically whichBelgian inheritance tax applies to them — and why.

Add to this the interaction of Belgian and Spanish succession law, a bilateral double taxation treaty, the complexities of Belgian financial products like Tak 21 and pensioensparen, and the practical question of digital assets — and it is clear that Belgian expats in Spain face an estate planning picture that requires specific, cross-border expertise.

This guide covers the key issues in plain terms. It is not a substitute for legal or tax advice. It is a map of the terrain, written to give you the confidence to ask the right questions before you sit down with a notaris, notaire, or Spanish notario.

EU Regulation 650/2012 — Rechtskeuze / Choix de Loi for Belgian Nationals

The foundation of all cross-border estate planning in Europe is EU Regulation 650/2012, known as Brussels IV, which came into application on 17 August 2015. Its core function: to determine which country's succession law governs your estate when you die.

The Default Rule

Your estate is governed by the law of the country where you are habitually resident at the time of your death. For a Belgian national who has made their life on the Costa del Sol, in Barcelona, or on the Costa Blanca, this almost certainly means Spanish law applies by default— not Belgian law.

This matters enormously. Spanish and Belgian succession law differ in significant ways — particularly regarding forced heirship rules and the position of the surviving spouse. Without an explicit election of Belgian law, a Belgian will drafted with Belgian legal concepts in mind may produce unexpected results when interpreted under Spanish law.

The Rechtskeuze / Choix de Loi — Electing Belgian Law

Article 22 of EU Regulation 650/2012 provides a solution. EU nationals can elect the law of their nationality to govern their entire estate — overriding the habitual residence default. For Belgian nationals in Spain, this is called the rechtskeuze (in Dutch) or choix de loi (in French). The election must be explicit and must appear in your will. It cannot be implied, assumed, or retroactively applied.

A properly worded election clause in a Spanish notarial will reads:

Without this clause, Spanish law governs. With it, Belgian succession law — including Belgian forced heirship rules and the surviving spouse's usufruct — applies to your entire worldwide estate, including your Spanish assets.

When Electing Belgian Law Makes Sense — and When It Does Not

Belgian Forced Heirship — Réserve Héréditaire / Reserve and the Spouse's Usufruct

If you elect Belgian law under EU Regulation 650/2012, Belgian forced heirship rules apply to your entire worldwide estate — including your Spanish property. Understanding how Belgian forced heirship works is essential before making this election.

The Belgian Réserve Héréditaire / Reserve

Belgian law reserves a fixed portion of the estate for children collectively — the réserve héréditaire (French) or reserve (Dutch). The reserved share is 50% of the estate, collectively for all children, regardless of how many children there are. This is a crucial distinction from French law, where the reserved share increases with each additional child. Under Belgian law, the calculation is simpler and more favourable to testamentary freedom in larger families:

The reserved half is shared equally among all children. The remaining 50% — the quotité disponible / beschikbaar deel— can be distributed freely by will. Note that this fixed 50% reserve regardless of the number of children contrasts sharply with French law (where the reserve reaches 75% with three or more children). For Belgian families with three or more children, electing Belgian law instead of French law gives considerably more testamentary freedom.

The Surviving Spouse's Position — Usufruct Over the Entire Estate

The surviving spouse in Belgian law holds a particularly strong position. Under Belgian succession law, the surviving spouse has the right to the usufruct (usufruit / vruchtgebruik) over the entire estate— not just the matrimonial home, but potentially all assets including investments and savings.

This usufruct means the surviving spouse has the right to use and draw income from estate assets during their lifetime, even if the children own the bare property (nue-propriété / blote eigendom). The practical consequences:

• Children inherit bare ownership of assets while the surviving spouse retains usufruct
• The children cannot sell or encumber inherited assets without the surviving spouse's agreement
• For Spanish real estate, this creates a split title that must be correctly reflected in the Spanish land registry
• Tax is assessed on the split between usufruct and bare ownership, reducing the immediate taxable value for children

In blended families, or where the surviving spouse and the children are from different relationships, this usufruct right can create prolonged tensions. It is one of the most important factors to discuss with a cross-border succession lawyer before making the rechtskeuze.

Worked Example — Réserve and Usufruct on a Spanish Estate

Belgian Inheritance Tax — Three Regional Regimes and Which One Applies to You

This is the area that surprises most Belgian expats — and most advisors who are not specialists in Belgian law. Belgium is a federal state, and inheritance tax (droits de succession / erfbelasting) is entirely a regional competence. There is no single Belgian inheritance tax. There are three regional inheritance tax systems, each with different rates, exemptions, and rules.

Overview of the Three Regional Regimes

Flemish Erfbelasting Rates for Direct Heirs (Indicative)

Wallonia & Brussels Rates for Direct Heirs (Indicative)

Rates are indicative. Tax rules change regularly. Always confirm current rates with a qualified Belgian tax advisor.

Which Region Applies to a Belgian Expat in Spain?

The applicable regional regime is determined by where the deceased had their last Belgian fiscal domicile (domicile fiscal / fiscale woonplaats) on the date of death — or, if no Belgian domicile on that date, the region of the last Belgian domicile.

For Belgian expats in Spain: if you definitively broke Belgian fiscal domicile by moving to Spain, Belgian droits de succession / erfbelasting may not apply to your worldwide assets at all (see Section 4). If you maintained a Belgian fiscal address — registered at a family member's address or retaining a Belgian property — the region of that address determines which regional regime applies. If you lived in multiple Belgian regions before leaving, the region where you were fiscally domiciled for the longest period in the last five years of your Belgian residence governs.

This last point creates genuine complexity for Belgians who moved between Flanders, Wallonia, and Brussels before emigrating to Spain. It requires careful legal analysis, not assumptions.

Belgian Fiscal Domicile vs. Spanish Residence — Breaking Belgian Tax Ties

Belgian inheritance tax law uses the concept of domicile fiscal / fiscale woonplaats to determine tax liability. Unlike the UK's complex concept of domicile of origin, Belgian law looks primarily at actual residence and the centre of vital interests— where you actually live, where your family is, where your economic activity is centred.

When a Belgian national moves to Spain and establishes genuine fiscal residency there, they can break Belgian fiscal domicile. If this break is clean and complete, they will no longer be subject to Belgian droits de successionon their worldwide assets at death — only on Belgian-sited assets, if any, under the terms of the Belgium-Spain double taxation treaty.

How to Break Belgian Fiscal Domicile Cleanly

Belgian tax authorities (SPF Finances / FOD Financiën) may challenge a claimed change of domicile if ties to Belgium remain strong. Relevant factors they examine:

• Official deregistration from the Belgian National Register (Registre National / Rijksregister) and registration with the Spanish padrón municipal and Registro Central de Extranjeros
• Tax returns: filing Spanish IRPF as a Spanish fiscal resident; no longer filing Belgian IPP (impôt des personnes physiques / personenbelasting) as a resident
• Centre of vital interests: daily life, family, main home, economic activity all centred in Spain
• Belgian property: if you retain a Belgian property and use it regularly, Belgian tax authorities may argue your centre of interests remains in Belgium
• Belgian financial products: alone, these do not establish Belgian domicile, but combined with other ties, they are relevant

No Exit Tax — Belgium's Comparative Advantage for Departing Expats

Unlike France, Belgium does not impose an exit tax when individuals move abroad. There is no capital gains trigger on departure, no deemed disposal of assets, and no departure levy. This makes leaving Belgium considerably simpler from an immediate tax perspective than leaving France, and it is one reason why Belgian expats can plan their departure relatively freely.

However, the absence of exit tax does not mean Belgian succession tax disappears automatically. Belgian inheritance tax may still apply if you die while Belgian fiscal domicile is contested, or if you maintain significant Belgian ties. Document your break clearly and comprehensively, and seek confirmation from a qualified Belgian-Spanish tax specialist before assuming Belgian inheritance tax no longer applies to your worldwide estate.

The Belgium-Spain Double Taxation Treaty on Inheritances

Belgium and Spain have a bilateral convention for the avoidance of double taxation on inheritances. The general principle: Spain has primary taxing rights on Spanish-sited assets (taxed via ISD); Belgium taxes worldwide assets of Belgian fiscal domiciliaries but credits Spanish tax paid against Belgian tax due on the same assets.

In practice, for most Belgian-Spanish estates, the treaty prevents true double taxation — but only if both returns are filed correctly, in the right order, within the applicable deadlines. Spanish ISD must be filed within 6 months of the date of death. This deadline applies to all heirs of Spanish-sited assets, regardless of nationality or residence. Extensions of up to 6 additional months can be requested before the initial deadline.

Belgian Financial Products in Spain — Tak 21, Tak 23, Pensioensparen, and Beleggingsrekening

Belgian expats typically carry Belgian financial products with them — products that are familiar and well-optimised for Belgium, but that create complexity when you live in Spain and when your estate is administered across borders.

Tak 21 and Tak 23 — Belgian Life Insurance (Assurance-Vie / Levensverzekering)

The Tak 21 (Branch 21) and Tak 23 (Branch 23) are Belgian life insurance products broadly equivalent to the French assurance-vie. They are among the most popular savings and succession vehicles in Belgium:

• Tak 21: capital-guaranteed insurance contract; designated beneficiaries receive proceeds outside the formal succession process under Belgian law
• Tak 23: unit-linked, investment-linked; same beneficiary designation structure; higher risk/return profile

Pensioensparen — Belgian Pension Savings Plan

The pensioensparen is a tax-advantaged long-term savings plan offering Belgian residents a tax reduction on annual contributions (capped at a statutory maximum). When you become a Spanish fiscal resident, Belgian tax advantages on new contributions cease. The accumulated value is treated by Spanish tax authorities as a regular financial asset: it must be declared on the Spanish Modelo 720 (foreign asset declaration) if the value exceeds the threshold, and on death it is included in your taxable estate for Spanish ISD purposes. It may also be subject to Belgian erfbelasting if Belgian fiscal domicile has not been cleanly broken.

Beleggingsrekening — Belgian Investment Account

A Belgian beleggingsrekening (investment account) held with a Belgian bank or broker must be declared to Spanish tax authorities annually via the Modelo 720if the balance exceeds €50,000. On death, it forms part of the estate and is taxed under the applicable succession and tax rules of both countries. Ensure this account is included in your asset inventory and that your heirs know where it is held and who to contact.

The Digital Assets Problem — What Your Notaire and Notario Cannot Transmit

A Belgian expat in Spain in 2026 typically has a digital estate that spans two countries and multiple platforms. Belgian online banking is highly digitised — BNP Paribas Fortis, ING België, KBC, Belfius, and neobanks have moved comprehensively online. Tak 21 and Tak 23 policies are accessed through online portals. Pensioensparen accounts are managed digitally. And increasingly, Belgian expats hold cryptocurrency on Belgian or international exchanges.

Neither your Belgian notaire or notaris nor your Spanish notario can transmit this information to your heirs. A will can name a beneficiary for a cryptocurrency wallet — but it cannot provide the seed phrase or private key. An estate administrator can contact KBC in Belgium — but cannot log in to the online banking portal without credentials. Your heirs may know you held a Tak 21 with a specific insurer but have no idea how to file the claim, access the platform, or locate the policy number.

The Belgian-Specific Digital Estate Gap

Belgian expats face particular digital estate risks in several areas:

• Tak 21 / Tak 23 policy access: the insurer knows the beneficiary, but the beneficiary may not know the policy number, the claims process, or how to file from Spain
• Pensioensparen: the financial institution holds the account, but heirs need account numbers and contact details to claim efficiently
• Belgian online banking credentials: banks will release account contents to heirs following a legal process, but having access credentials accelerates things significantly
• Cryptocurrency: seed phrases and private keys cannot be recovered by any institution — if your heirs do not have them, the assets are permanently inaccessible

How Sucesio Addresses the Gap

Sucesio is not a will, a notaire, or a tax advisor. It is a secure digital vault that complements your Belgian and Spanish estate plan by transmitting what legal documents cannot:

• Access credentials for Belgian and Spanish online banking (KBC, BNP Paribas Fortis, ING België, Sabadell, CaixaBank)
• Policy numbers, platform logins, and claim instructions for Tak 21 / Tak 23 policies
• Seed phrases and private keys for cryptocurrency wallets
• Account details and claim contacts for your pensioensparen provider
• Personal messages, family letters, and legacy documents for your loved ones

Sucesio stores this information in an encrypted vault and releases it to your designated recipients after death is verified — through a structured process that works across borders, in any language.

Practical Checklist for Belgian Expats in Spain

Work through this checklist with your legal and financial advisors. It is not exhaustive and does not replace professional advice.

Legal Documents

• Spanish notarial will (testamento notarial abierto) — executed before a Spanish notario with cross-border succession experience; include a rechtskeuze / choix de loi clause if you elect Belgian law
• Belgian will — for Belgian assets; executed before a Belgian notaire or notaris; updated to reflect your Spanish life
• Rechtskeuze / choix de loi clause — explicit election of Belgian law under Article 22 of Regulation 650/2012; must appear in your will and be clearly worded
• European Certificate of Succession — understand how this document simplifies cross-border recognition of your estate in Spain and Belgium
• Poder notarial (Spanish power of attorney) — grants someone authority to act in Spain if you are incapacitated
• Belgian volmacht / procuration — Belgian power of attorney for Belgian assets and affairs

Financial and Tax Planning

• Regional inheritance tax review — confirm which Belgian regional regime applies (Flanders, Wallonia, or Brussels-Capital); this depends on your last Belgian fiscal domicile
• Belgian fiscal domicile assessment — confirm whether you have cleanly broken Belgian fiscal domicile; document the break if so; model Belgian inheritance tax exposure if not
• Belgium-Spain double taxation treaty review — confirm which country has primary taxing rights on each asset class; plan the order and timing of tax filings
• Tak 21 / Tak 23 review — confirm Spanish ISD treatment; review beneficiary designations; consider restructuring if appropriate
• Pensioensparen and beleggingsrekening — ensure declared on Spanish Modelo 720 if over threshold; include in estate plan
• Spanish ISD projection — model the Spanish ISD on your Spanish assets for your heirs, by autonomous community

Practical Steps

• Complete asset inventory — all assets in Spain and Belgium with values, account numbers, institutions, and contacts
• Dual lawyer coordination — a Belgian notaire or notaris for Belgian assets and a Spanish abogado or notario for Spanish assets, briefed to coordinate with each other
• Inform heirs of the Spanish 6-month ISD deadline — they must know this before they need it; 6 months is shorter than it sounds for a cross-border estate
• Document Belgian financial product access — policy numbers, platform logins, insurer contact details, and beneficiary designations
• Digital assets plan — a separate, secure record of online accounts, credentials, and crypto access; or a Sucesio vault

How Sucesio Complements Your Belgian and Spanish Estate Plan

A well-structured Belgian-Spanish estate plan typically involves: a Spanish notarial will with or without rechtskeuze; a Belgian will for Belgian assets; forced heirship (réserve héréditaire / reserve) and spouse usufruct correctly modelled; the applicable Belgian regional inheritance tax regime identified; Belgian fiscal domicile status confirmed; the Belgium-Spain double taxation treaty correctly applied; Tak 21 and pensioensparen structures reviewed for Spanish tax treatment; and both a Belgian and a Spanish legal professional briefed to coordinate.

Sucesio does not replace any of these elements. It fills a different, equally important gap: the practical transmission of information that legal documents cannot carry.

Your Belgian notaire cannot include your KBC online banking password in the estate file. Your Spanish notarial will cannot attach the seed phrase for your Bitcoin wallet. Your estate executor can contact AXA Belgium about your Tak 21 policy — but your heirs need the policy number and claims platform login to do it efficiently. And your children in Antwerp or Liège cannot claim your Belgian savings accounts without credentials that only you know.

Sucesio stores all of this in an encrypted vault and releases it to your designated recipients after death is verified — through a structured, cross-border process that does not rely on anyone finding a note in a drawer or guessing a password.

Your estate in 2026 is partly legal, partly financial — and partly digital. Sucesio addresses the digital part, so your heirs receive everything you intended to leave them.

Frequently Asked Questions