Partir travailler à l’étranger : Détachement, Contrat Local ou Contrat Expatrié ?
Going to work abroad raises a key administrative question that is often a source of confusion: Should you opt for seconded employee status, sign an expatriate contract, or accept a local contract? Behind these terms lie very different realities that will shape your entire experience abroad, from your health insurance to your future retirement.
To make the right choice, it is essential to understand one basic rule: strictly speaking, in terms of social security, taxation, and day-to-day labor law, an expatriate contract and a local contract function exactly the same way. In both cases, you leave the French system. The real dividing line, therefore, lies between secondment (remaining in France) andexpatriation (moving abroad).
1. Le salarié détaché : la continuité rassurante avec la France
The status of a seconded employee is often seen as the most secure, but it is also the most strictly regulated. It is intended for temporary assignments. Your French employer sends you on an assignment outside France, but your original employment contract remains in effect.
Full social security coverage: You continue to receive full benefits under the French system. Your retirement benefits accrue as usual, your unemployment insurance contributions continue, and your health coverage remains through the French Social Security system (CPAM).
A strict time limit: Secondment is purely a temporary solution. Within the European Union, the legal duration is generally capped at 24 months. Outside the EU, it depends on bilateral agreements (often between 3 and 5 years at most). Beyond this period, the employee must change their status.
2. Le contrat local et le statut “expatrié” : l’immersion dans le pays d’accueil
This is where we need to dispel a very persistent HR myth: an expatriate contract is, legally and socially speaking, a local contract.
Once you choose one of these two statuses, you are no longer covered by the French social security system, but exclusively by that of your country of residence. Your taxes, health insurance, and retirement contributions are governed by local laws. The only difference between these two statuses lies in your contractual relationship with the company:
The “pure” local contract: You resign from your job in France (or you are unemployed) and are hired directly by a foreign company, in accordance with local labor laws. All ties to France are completely severed.
The “expat” contract (as defined by HR): This is a local contract, but one initiated by your French employer. Your contract in France is “suspended” (put on hold). You sign a local contract with the foreign subsidiary, but the parent company commits to repatriating you and reinstating you to its workforce at the end of your assignment. This status also comes with additional financial benefits (housing assistance, payment for children’s school tuition, and coverage of health insurance).
3. Assurance santé : l’enjeu central de la mobilité
As soon as you sign a local or expatriate contract and reside outside of France for more than three months, your entitlement to French health insurance ends.
Depending on your host country, the local healthcare system may be complex, of inconsistent quality, or result in exorbitant bills (a medical emergency in the United States or Singapore can quickly cost tens of thousands of euros). To cover these costs, purchasing international health insurance is essential. You have two options:
Insurance Starting at the First Euro: A private insurance company covers all of your medical expenses starting with the very first charge, regardless of whether it’s in France or not.
The CFE + Supplemental Insurance Combination: You voluntarily enroll in the Caisse des Français de l’Étranger (to maintain your connection to Social Security) and supplement it with private supplemental insurance to cover the actual cost of local medical care.
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4. The Pitfall of Retirement and “Non-Agreement” Countries
This is the most critical point to watch out for when living abroad. If you’re on a secondment, you pay social security contributions in France, so your employment history remains intact. But if you’re on a local or expatriate contract, you pay contributions only in the host country.
However, France has not signed social security agreements with every country in the world.
In a country with a social security agreement: The quarters worked abroad will be recognized and counted by the French Pension Insurance system when you apply for your benefits.
In a country without an agreement (non-agreement country): The years worked locally do not count at all toward the French system.
To avoid a significant reduction in your future retirement pension due to a “gap” in your career, the solution is to make voluntary contributions to the CFE’s old-age insurance program. This allows you to continue accruing your French quarters while working abroad.
Secondment vs. Expatriation: The Essential Comparison
| Criterion | Seconded Employee | Local Contract / Expat Contract |
| Employer | French Company | Local Company (or Subsidiary) |
| Labor Law | French law | Local law (host country) |
| Social security (Health) | French system (CPAM) | Local system (International insurance required) |
| Retirement | Full continuity in France | Local contributions (be aware of countries without a social security agreement) |
| Unemployment | Retention of benefits in France | Loss of French benefits |
| Duration | Strictly limited (24 months in the EU) | Indefinite / Long-term |
| Connection to France | The French contract continues as normal | The French contract is terminated (for local employees) or suspended (for expatriates) |
Conclusion
The choice between a secondment, an expatriate contract, and a local contract goes far beyond the simple question of take-home pay. It affects your immediate level of social security coverage, your future retirement benefits, and your overall financial security.
While secondment offers extremely reassuring administrative continuity, working abroad under a local contract requires a genuine ability to plan ahead. Understanding your new social security system, assessing healthcare costs in the host country, and filling any gaps with private insurance (such as a CFE supplement) are essential steps for pursuing an international career with complete peace of mind.
