Building on his Country Focus article examining the France–Monaco corridor, Benjamin Fiorino shares a case study to illustrate a recurring and often misunderstood issue: Monaco residency alone does not eliminate French inheritance tax exposure, particularly where heirs are resident in France.
The Client
Family structure and residence
The client is a 64-year-old UK national resident in Monaco. He has two children who have lived in France for more than 15 years and are fully French tax resident.
Asset profile
His estate comprises:
- €4 million of French real estate
- €10 million of financial assets held as portfolio investments and liquidity
Initial misconception: Monaco residency as a shield
Under Monaco law, assets located in Monaco are exempt from inheritance tax in the direct line. This often creates the assumption that Monaco residency is sufficient to eliminate French inheritance tax exposure. However, this protection does not extend automatically to cross-border situations involving French-resident heirs.
Under French domestic tax law, inheritance tax applies to worldwide assets inherited by French-resident beneficiaries where they have been resident in France for at least six of the ten years preceding death. Both children met this condition, creating significant exposure beyond the client’s French real estate.
The Solution
Confirming treaty ineligibility
The first step was to assess whether the client could rely on the France–Monaco inheritance tax treaty. While the treaty can, in certain circumstances, prevent France from taxing financial assets held by a Monaco resident, its application is not based on residency alone. In practice, treaty protection depends on nationality. Unlike some other inheritance tax treaties concluded by France, the France–UK treaty contains no non-discrimination clause based on nationality. As a result, the client, as a UK national, could not rely on the Franco-Monégasque treaty.
Impact of French domestic law
Without treaty protection, French domestic law applied in full. Given that the heirs were long-term French tax residents, Article 750 ter of the French Tax Code resulted in French inheritance tax on the client’s worldwide estate.
Implementing life insurance structuring
To mitigate this exposure, the €10 million financial portfolio was restructured through qualifying life insurance contracts under Article 990 I of the French Tax Code. This allowed the financial assets to benefit from a separate inheritance tax regime with preferential allowances and rates.
French real estate remained taxable in France under standard inheritance tax rules, but the restructuring substantially reduced the portion of the estate exposed to the highest marginal tax rates.
The Benefits
Baseline outcome without structuring
Without any planning, the entire €14 million estate would have been taxable in France. After applying allowances, each child would have faced an inheritance tax liability of approximately €2.85 million. This resulted in a total tax cost of around €5.7 million and an effective tax rate of approximately 41%.
Outcome following life insurance structuring
Following the restructuring:
- Financial assets benefited from the life insurance inheritance tax regime, reducing tax to approximately €1.44 million per child
- French real estate remained taxable, generating inheritance tax of approximately €750,000 per child
Overall tax efficiency achieved
Total inheritance tax fell to approximately €4.4 million, reducing the effective tax rate to around 31%. The planning generated an estimated €1.3 million inheritance tax saving while preserving clarity, flexibility and control in the succession strategy.
Conclusion
This case demonstrates that Monaco residency, while often viewed as decisive in inheritance tax planning, offers no universal protection where succession involves French-resident heirs. Outcomes are driven less by residence or asset location, and more by nationality, treaty eligibility and the extraterritorial reach of French tax law.
For families operating along the France–Monaco corridor, early confirmation of treaty access is essential. Where protection is unavailable, proactive structuring remains critical to avoid unintended worldwide taxation and restore predictability in succession outcomes.