Swiss Expat Estate Planning Spain: The 2026 Guide

IN 30 SECONDS

  • Switzerland is not a member of the EU. This means EU Regulation 650/2012 — the regulation that governs cross-border succession across EU member states — applies to your Spanish assets but not to your Swiss assets, creating a genuine legal gap in cross-border estate planning.
  • Switzerland operates its own forced heirship system (the Pflichtteil under the Swiss Civil Code), which was significantly reformed in January 2023. Understanding the updated rules is essential for Swiss nationals who have accumulated wealth on both sides of the border.
  • There is no bilateral succession treaty between Spain and Switzerland. In the absence of such a treaty, a carefully drafted two-will strategy — one Spanish will, one Swiss will, each with explicit election of law clauses — is the cornerstone of sound planning.
  • Swiss-specific financial assets — the second pillar (2e pilier / Säule 2), the third pillar (pilier 3a / Säule 3a), cantonal bank accounts, and Swiss real estate — carry specific succession rules that Spanish institutions cannot administer and that your Spanish notario cannot unlock.

The Swiss community in Spain is among the most financially sophisticated of any expat group on the continent. Significant clusters have established themselves on the Costa del Sol, in Mallorca, and in Barcelona — drawn by climate, lifestyle, and quality of life. Many have done so while retaining meaningful financial and family ties to Switzerland: property in the cantons, pension entitlements built over decades, brokerage accounts with cantonal banks, and crypto holdings that reflect Switzerland's well-earned status as one of Europe's most forward-thinking jurisdictions for digital assets.

Estate planning for this community is unusually demanding. Not because Swiss or Spanish law are individually opaque — both are well-structured civil law systems — but because the two frameworks do not speak to each other in any formal, treaty-based way. The European succession rules that simplify planning for German, French, or Dutch expats in Spain simply do not apply to Switzerland. Switzerland is outside the EU. That single fact cascades into a series of practical and legal complications that require deliberate, coordinated planning.

This guide explains what those complications are, what options are available, and what Swiss nationals in Spain should do about them in 2026. It is not legal or tax advice. It is a map of the terrain so you can have more informed conversations with the professionals who can help.

Section 1: The Switzerland-EU Succession Law Problem

The starting point for any cross-border estate plan in Europe is EU Regulation 650/2012, which came into force on 17 August 2015. This regulation determines which country's succession law governs your estate when you die — and it applies across all EU member states, including Spain.

What EU Regulation 650/2012 Does — and Does Not — Cover

Under the Regulation, the default rule is straightforward: your entire estate is governed by the law of the country where you are habitually resident at the time of your death. A Swiss national who has made their home in Marbella, Palma de Mallorca, or Barcelona will, by default, have their entire estate governed by Spanish succession law — including their Spanish property, their Spanish bank accounts, and, in principle, their worldwide assets.

Critically, however, Article 22 of the Regulation allows you to elect the law of your nationality instead. A French national can elect French law. A German national can elect German law. A Dutch national can elect Dutch law. These elections are valid and recognised across all EU member states because the Regulation is EU law.

Switzerland is not an EU member state. Switzerland is not part of the European Economic Area (EEA). It is linked to the EU through a series of bilateral agreements — the Bilaterals I and Bilaterals II — but succession law is not covered by any of those agreements. EU Regulation 650/2012 does not bind Switzerland, and Swiss courts are not obliged to recognise the law elections, certificates of succession, or judicial decisions that the Regulation creates.

This creates a precise and consequential gap: EU Regulation 650/2012 will govern the succession of your Spanish assets. Swiss law — specifically the Swiss Private International Law Act (IPRG/LDIP) and the Swiss Civil Code (ZGB/CC) — will govern your Swiss assets. And the two frameworks have no formal mechanism for speaking to each other.

How Each System Claims Jurisdiction

When a Swiss national habitually resident in Spain dies, two parallel succession processes are triggered:

In Spain: Spanish courts and notaries will apply EU Regulation 650/2012. By default, Spanish succession law applies to all assets — but if a valid election of Swiss law has been made in your will, Spanish courts will attempt to apply Swiss succession law to your worldwide estate (including your Spanish assets). Note that Spain is obliged to apply a law elected under Article 22 even if it is the law of a non-EU state — the Regulation's conflict-of-laws rules extend to third-country laws.

In Switzerland: Swiss courts will apply the IPRG/LDIP. Under Swiss private international law, the canton of last Swiss residence (or, if none, the canton of registration of Swiss citizens abroad) has jurisdiction over Swiss assets. Swiss courts apply Swiss succession law by default — they are not bound by any election made under EU Regulation 650/2012, and they are not bound by certificates or judgments issued by Spanish authorities.

The result is that you can have two separate succession proceedings running simultaneously — one in Spain, one in Switzerland — each applying potentially different legal rules to different portions of the same estate. Without coordination, this is expensive, slow, and creates significant risk of inconsistent outcomes.

Internal link: For a broader overview of how EU Regulation 650/2012 works for expats across EU member states, see our EU Regulation 650/2012 Explained for Expats in Spain guide.

Section 2: Swiss Succession Law Basics — The 2023 Reform and What Changed

Switzerland's succession law underwent its most significant reform in decades on 1 January 2023. Any Swiss expat in Spain whose estate plan was drafted before that date needs to review it in light of the new rules.

The Swiss Pflichtteil — Updated

The Swiss Pflichtteil (mandatory share under the ZGB/CC) protects certain heirs from being fully disinherited. Before the 2023 reform, the following heirs were entitled to a mandatory share:

After the 2023 reform, the Pflichtteil entitlements were reduced and the class of protected heirs narrowed:

This reform significantly increases testamentary freedom for Swiss nationals. A Swiss national with adult children can now leave a greater proportion of their estate to a surviving spouse, a charitable foundation, or any other beneficiary — without the children being able to claim as much as they could before 2023.

Intestacy: The Default Order of Succession

Under Swiss law, if you die without a valid will, your estate is distributed according to the Parentelsystem (parentelic system):

A surviving spouse or registered partner receives one half of the estate when competing with first-order heirs (children), or three quarters when competing with second-order heirs (parents and siblings).

Unmarried partners have no automatic succession rights under Swiss law — a significant planning point for Swiss nationals in Spain who may be in long-term partnerships without formalised legal status.

Testamentary Instruments Under Swiss Law

Swiss law recognises several forms of will:

Swiss law also recognises inheritance contracts (Erbvertrag) — binding agreements between the testator and one or more future heirs about the terms of succession. These are executed as public instruments before a notary and have contractual force: they cannot be revoked unilaterally. This instrument is common in Swiss business succession contexts, particularly for passing on family-owned SMEs.

Section 3: No Treaty — What the Absence of a Spain-Switzerland Succession Agreement Means

France and Switzerland have a bilateral succession treaty. Germany and Switzerland have one too. Spain and Switzerland do not.

This gap matters because bilateral succession treaties typically create harmonised rules for determining which country's law applies, which country has judicial jurisdiction, and how estates are administered. In the absence of such a treaty, the succession of a Swiss national in Spain is governed by two parallel, uncoordinated legal systems — each applied independently by the courts of its own country.

The practical consequences include:

Dual jurisdiction over assets. Spanish courts will handle the administration of Spanish assets. Swiss cantonal authorities will handle Swiss assets. Neither is obliged to wait for or defer to the other.

No automatic recognition of Spanish certificates. A European Certificate of Succession issued by Spanish authorities under EU Regulation 650/2012 is recognised automatically across EU member states — but not in Switzerland. Swiss financial institutions (cantonal banks, brokerage firms, pension custodians) are not obliged to accept a Spanish succession document. They will typically require their own Swiss succession proceedings, including a Swiss inheritance certificate (Erbenschein / attestation d'héritier).

Parallel professional teams required. Administering a cross-border Swiss-Spanish estate realistically requires a Spanish abogado or notario for Spanish assets and a Swiss Notar or lawyer for Swiss assets — briefed to work in coordination. Without this coordination, the risk of procedural gaps, missed deadlines, or inconsistent law applications is significant.

No treaty-based tax relief. There is a Spain-Switzerland double taxation treaty in the field of income and capital taxes (the 1966 treaty, updated). However, this treaty does not cover inheritance taxes in a comprehensive way. Swiss nationals in Spain should not assume that the bilateral tax relationship will prevent double taxation on inherited assets — it may not (see Section 6 on succession tax).

Section 4: The Two-Wills Strategy — Spanish Will, Swiss Will

Given the absence of a bilateral succession treaty and the dual-jurisdiction problem, the most widely recommended approach for Swiss nationals in Spain is to maintain two coordinated wills: one Spanish notarial will governing Spanish assets, and one Swiss will (public or handwritten) governing Swiss assets.

Why Two Wills?

A single will — whether drafted in Spain or Switzerland — creates practical and legal complications in the other jurisdiction. A Spanish notarial will may not be easily recognised by Swiss cantonal authorities for the purpose of transferring Swiss assets without additional Swiss proceedings. A Swiss public will, while theoretically capable of governing worldwide assets, will require a full succession administration in Spain for Spanish property — an expensive process if the Spanish notario does not have a Spanish will to work from.

Two coordinated wills eliminate these friction points by ensuring that each succession proceeding has a native legal instrument to work with. This reduces delays, professional fees, and the risk of procedural gaps at the worst possible time for your family.

Election of Law Clauses

Each will should contain an explicit election of law clause:

In the Spanish will, elect Swiss law under Article 22 of EU Regulation 650/2012 if that is your preference — or accept Spanish law as the governing law if your family and asset situation is predominantly Spanish. A standard Spanish election of law clause reads:

"En uso de la facultad que me confiere el artículo 22 del Reglamento (UE) n.° 650/2012, elijo expresamente que la ley aplicable a mi sucesión sea la ley suiza, cuya nacionalidad ostento."

(Translation: "Exercising the right conferred on me by Article 22 of Regulation (EU) No 650/2012, I expressly choose the law of Switzerland, whose nationality I hold, as the law applicable to my succession.")

In the Swiss will, you may wish to include a choice of law clause under Swiss private international law (IPRG/LDIP Art. 90) designating Swiss law as applicable to the estate, particularly if you have elected Swiss law in your Spanish will and wish the two documents to be consistent.

Coordination Between the Two Wills

The two wills must be carefully coordinated to avoid conflict or ambiguity. Both documents should be reviewed together — ideally by a legal team in each country who communicate with each other — before execution. Key coordination points include:

Asset scope: The Spanish will should be clear that it covers Spanish-sited assets. The Swiss will should cover Swiss assets. If either purports to govern "all worldwide assets," there is a risk of conflict or duplication that causes complications in both proceedings.

Inheritance contract (Erbvertrag) review: If you have an existing Swiss inheritance contract — for example, governing the succession of a Swiss business or family property — the Spanish will must not inadvertently conflict with its terms. An Erbvertrag has contractual force and cannot be overridden by a later unilateral will.

Pflichtteil consistency: The Pflichtteil provisions under Swiss law — as reformed in 2023 — must be respected. If you elect Swiss law in your Spanish will, your Swiss Pflichtteil obligations apply to your entire worldwide estate, including Spanish assets. Model the Pflichtteil exposure before executing the wills.

Section 5: Succession Tax — Spain's ISD for Swiss Nationals

Switzerland is not a member of the EU or the EEA. For Spanish inheritance tax purposes, this is a meaningful distinction.

Spain's ISD — The Basics

Spain's Impuesto sobre Sucesiones y Donaciones (ISD) applies to the transfer of assets on death. The tax is administered at the autonomous community level, which means rates and allowances vary significantly depending on where the deceased was resident and where assets are located.

Swiss nationals who are resident in Spain at the time of death are subject to Spanish ISD on their worldwide estate — just as any other Spanish resident would be. Their heirs benefit from the regional allowances and rates applicable in the autonomous community of the deceased's residence.

Swiss nationals who are not resident in Spain but who own Spanish assets (property, bank accounts, investments) — a configuration sometimes called "non-domiciled" for Spanish tax purposes — are subject to Spanish ISD on those Spanish-sited assets only. Historically, non-resident heirs and beneficiaries were subject to the national (state-level) ISD rules rather than the more generous regional ones, which often resulted in significantly higher effective tax.

However, this non-resident disadvantage was largely corrected following a 2014 European Court of Justice ruling against Spain (Case C-127/12). Since the resulting legislative reform, EU/EEA residents can generally access the regional ISD rules of the autonomous community where the asset is located or the deceased was resident. Switzerland, being neither EU nor EEA, falls into a different category. Swiss nationals and their Swiss-resident heirs may still find themselves subject to less favourable treatment under the state-level ISD rules, depending on the specific facts and the most current administrative interpretation.

This is an area requiring specialist advice. The rules for non-EU, non-EEA nationals and their heirs under Spanish ISD are less clearly defined than for EU/EEA taxpayers, and the position of Switzerland specifically warrants careful analysis in each case. Regional variations — Madrid and Andalucía have near-full exemptions for direct family; Catalonia and Valencia charge significantly higher effective rates — make location of assets and residence a critical planning variable.

Internal link: For a detailed breakdown of how Spanish inheritance tax applies to foreigners and the impact of autonomous community rules, see our succession tax in Spain guide.

Switzerland's Own Inheritance Tax Position

Switzerland does not impose a federal inheritance tax. However, twenty-three of Switzerland's twenty-six cantons levy their own cantonal inheritance and gift taxes — and the rates, allowances, and exemptions vary considerably.

Key points for Swiss nationals in Spain whose heirs are based in Switzerland:

The absence of a comprehensive Spain-Switzerland tax treaty in the inheritance field means that Spanish ISD and Swiss cantonal inheritance tax may both apply to the same assets — with no formal credit or relief mechanism between them. The 1966 Spain-Switzerland double taxation treaty (updated in subsequent protocols) focuses primarily on income and capital taxes and does not comprehensively address inheritance tax double taxation. Swiss heirs receiving Spanish assets may owe Spanish ISD, and the cantonal tax treatment of the same inheritance may not provide an offset. Professional advice from advisors qualified in both Spanish and Swiss tax law is essential.

Section 6: Swiss Assets on Death — What Your Heirs Will Face

For Swiss expats in Spain, the Swiss side of the estate often represents the larger or more complex portion — built over decades of working life before relocation.

Cantonal Bank Accounts

Switzerland's cantonal banks (Kantonalbanken / banques cantonales) are among the most commonly used institutions for Swiss private wealth. On the death of an account holder who is resident abroad, the bank requires:

A Spanish succession document — even a European Certificate of Succession — is generally not sufficient to release funds from a Swiss cantonal bank. Heirs based in Spain must typically engage a Swiss notary or lawyer to obtain the appropriate Swiss certificate, which adds time, cost, and complexity to an already demanding process.

Swiss Real Estate

Swiss real estate is subject to Swiss law and administered by Swiss cantonal land registries. Foreign ownership restrictions (Lex Koller) may apply if heirs are non-resident foreigners — including Spanish-resident heirs inheriting Swiss property. Under the Lex Koller framework, non-resident foreigners generally cannot acquire Swiss residential real estate, with limited exceptions for holiday properties in designated areas. Inherited property may be subject to a requirement to dispose of it within a defined period if the heir does not qualify to hold it. This is a planning issue that requires attention before the event, not after.

Swiss Pension Assets — 2e Pilier and 3e Pilier

Switzerland's three-pillar pension system is one of the most developed in the world. Swiss nationals who worked in Switzerland before relocating to Spain may hold significant assets in the second pillar (occupational pension / LPP or BVG) and the third pillar (individual retirement savings / pilier 3a / Säule 3a).

Second pillar (2e pilier / BVG): On death, second-pillar assets pass according to the rules of the specific pension fund's regulations — not strictly according to your will or succession plan. Most pension fund regulations designate a specific priority order for death benefits: registered spouse or partner first, then children, then other dependants, then the estate. Critically, second-pillar assets often fall outside the estate for succession purposes — they do not form part of the Nachlass (estate) that your will governs. This means they pass to beneficiaries directly, outside the Pflichtteil calculation.

However, the pension fund must be notified of the death and provided with documentation — typically a death certificate, the Swiss inheritance certificate, and identification of eligible beneficiaries. For Swiss expats in Spain, where the fund has no local presence, this process requires engagement with the Swiss pension institution directly, in Switzerland, often in German, French, or Italian.

Third pillar (pilier 3a / Säule 3a): Third-pillar accounts are individual retirement savings accounts held at banks or insurance companies. On death, they pass to named beneficiaries in a specific statutory order, which may be different from your general will. As of 2023, the statutory beneficiary order for pilier 3a is: registered spouse or civil partner, then direct descendants, then those in a committed live-in partnership, then parents, then siblings, then other heirs. You can adjust this order within the statutory framework by notifying your pilier 3a provider. If you have not done this, the default order applies — and it may not reflect your wishes.

Pilier 3a assets held in Switzerland are also exempt from the estate for Swiss inheritance tax purposes in most cantons, but they may be subject to a separate lump-sum withholding tax on distribution. For Spanish-resident heirs, the interaction with Spanish ISD on the received funds requires analysis.

Section 7: Digital Assets and Crypto — Switzerland's Added Complexity

Switzerland has established itself as one of Europe's most progressive jurisdictions for crypto and digital assets. The Crypto Valley in Zug, the progressive Swiss DLT Act, and the regulatory sophistication of FINMA have made Switzerland a natural home for both institutional and individual cryptocurrency holders.

For Swiss expats in Spain, this means the digital asset dimension of their estate is often non-trivial. It may include:

These assets create a compounding complexity problem. They are held in Switzerland, governed by Swiss law, and administered by Swiss institutions. They pass to heirs under Swiss succession rules — not Spanish ones. And they are, almost by definition, inaccessible without credentials that no will, notarial deed, or succession certificate can transmit.

A notarised Spanish will can establish that your heirs are entitled to your Bitcoin. It cannot give them the seed phrase. A Swiss Erbenschein can authorise them to approach your cantonal bank's crypto custody arm. But if the bank holds crypto on your behalf in a self-custodied wallet and the private key is known only to you, the Erbenschein alone is insufficient.

Internal link: For a detailed treatment of crypto inheritance as an expat in cross-border situations, see our dedicated guide.

The practical solution is a secure, verified transmission mechanism that operates alongside the legal instruments — not instead of them. Sucesio provides exactly this: an encrypted digital vault that stores access credentials, seed phrases, and instructions, released to your designated heirs after death is verified, through a structured process that does not depend on anyone finding a note in a drawer or guessing a password.

For Swiss expats in Spain with crypto holdings, Sucesio's vault can store:

None of this can appear in a will. All of it can live securely in a Sucesio vault.

Frequently Asked Questions

1. Can I elect Swiss law in my Spanish will even though Switzerland is not in the EU?

Yes. Article 22 of EU Regulation 650/2012 allows you to elect the law of your nationality — and Spain, as an EU member state, is obliged to apply that elected law even when it is the law of a non-EU country such as Switzerland. Your Spanish will should include an explicit election clause designating Swiss succession law. However, be aware that electing Swiss law means Swiss Pflichtteil rules apply to your worldwide estate — including your Spanish assets. The 2023 reform reduced the Pflichtteil for children from ¾ to ½ of their intestacy share, which increases your testamentary flexibility. Model the Pflichtteil implications before executing the election.

2. Will Switzerland recognise the European Certificate of Succession issued in Spain?

No. Switzerland is not a party to EU Regulation 650/2012, and Swiss cantonal authorities are not obliged to recognise European Certificates of Succession. To administer Swiss assets — release funds from cantonal banks, transfer Swiss real estate, or claim pension assets — your heirs will need a Swiss inheritance certificate (Erbenschein or attestation d'héritier) issued by the competent Swiss cantonal authority. This requires a separate succession proceeding in Switzerland, typically with the assistance of a Swiss notary or lawyer. Both proceedings (Spanish and Swiss) must be conducted in parallel or sequentially.

3. Are my Swiss pilier 3a and second-pillar assets covered by my Spanish will?

Generally no — or only indirectly. Swiss pension assets (both second pillar and pilier 3a) typically pass to beneficiaries according to the pension fund or account rules, outside the estate governed by your will. Named beneficiaries receive these assets directly, independently of the general succession. However, if no eligible beneficiary is living at the time of your death, the assets may fall into the estate and be governed by your will. Review the beneficiary designations on your pilier 3a accounts and confirm with your second-pillar fund who will receive the death benefit — and whether you have any flexibility to change the priority order.

4. Does Spain's inheritance tax apply to my Swiss bank account if I am resident in Spain?

Yes. If you are habitually resident in Spain at the time of your death, Spanish ISD applies to your worldwide estate — including your Swiss bank accounts, investments, and other assets. The autonomous community of your residence determines the applicable rates and allowances. Your Swiss-resident heirs will also be subject to cantonal inheritance tax in Switzerland if applicable (most cantons exempt children). There is no comprehensive Spain-Switzerland tax treaty on inheritance to prevent double taxation on the same assets. A cross-border tax advisor with expertise in both systems is essential for structuring the estate to minimise the combined tax burden.

5. My unmarried Swiss partner and I live together in Spain. What succession rights does my partner have?

Under Swiss law, an unmarried partner has no automatic succession rights. Under Spanish law, the position varies by autonomous community — some regions (Catalonia, the Basque Country, Navarre) recognise de facto partnerships and grant them succession rights; others do not. Neither system provides automatic nationwide protection for unmarried partners. Regardless of where you live in Spain, the most reliable protection for an unmarried partner is a will — ideally both a Spanish will and a Swiss will — that explicitly designates them as a beneficiary. Be mindful of the Pflichtteil: if you have children from a previous relationship, they retain their mandatory share under Swiss law, which limits what you can leave to a partner. The 2023 reform does not eliminate the children's Pflichtteil — it reduces it from ¾ to ½ of their intestacy portion, which increases flexibility but does not remove the constraint.

What Swiss Expats in Spain Should Do Now

The planning steps for Swiss nationals in Spain are more demanding than for most other European expats — precisely because of the absence of bilateral legal and treaty frameworks. But the demands are manageable if addressed proactively:

The first priority is a coordinated two-will strategy: a Spanish notarial will with an explicit election of law clause, and a Swiss public will (or review of an existing Erbvertrag), drafted or reviewed by counsel in each country who communicate with each other. Both documents must be consistent in scope and in the Pflichtteil implications they create.

The second priority is documenting Swiss assets comprehensively: cantonal bank accounts, pilier 3a providers, second-pillar pension fund details, real estate registered in Switzerland, and any Swiss-sited investments or crypto. Your Spanish abogado and Swiss lawyer both need this inventory. Your heirs need it even more.

The third priority is verifying beneficiary designations on Swiss pension accounts. For pilier 3a, this means notifying your bank or insurer of your preferred beneficiary order within the statutory framework. For the second pillar, it means requesting confirmation from your pension fund of who will receive the death benefit and under what conditions.

The fourth priority is the digital transmission gap. A legally impeccable two-will structure resolves the legal question of who inherits. It does not resolve the practical question of how your heirs access what they inherit — particularly for Swiss bank e-banking, crypto platforms, and cantonal bank accounts that require specific credential-based access. This is the gap Sucesio is designed to fill.

Conclusion

Estate planning for Swiss expats in Spain sits at one of the most complex intersections in European cross-border succession — two sophisticated legal systems with no formal dialogue between them, no bilateral succession treaty, and a growing class of digital and pension assets that legal documents alone cannot transmit.

The good news is that the complexity is navigable. The 2023 Swiss Pflichtteil reform has expanded testamentary freedom significantly. The two-will strategy is well-established and widely used. Spanish notaries with cross-border experience exist in every major expat community on the Costa del Sol, in Mallorca, and in Barcelona. Swiss notaries and lawyers with international succession experience are accessible from anywhere.

The remaining gap — the practical transmission of credentials, pension details, crypto keys, and digital access — is the one that Sucesio is built to close.

Sucesio helps Swiss expats in Spain organise both sides of their estate — from their Spanish property to their Swiss accounts and crypto. See how it works →

Published: 2026. References: Regulation (EU) No 650/2012 · Swiss Civil Code (ZGB/CC) arts. 457–640 · Swiss Private International Law Act (IPRG/LDIP) · Swiss Federal Act on Occupational Retirement, Survivors' and Disability Pension Plans (LPP/BVG) · Ley 29/1987 ISD · Spain-Switzerland double taxation treaty (1966, updated). This article is for informational purposes only and does not constitute legal or tax advice. Consult qualified advisors in both Spain and Switzerland.