Duration of the posting of workers in France: why it varies and the rules foreign employers must know

The duration of the posting of workers is not a single neutral figure: it results from a combination of immigration rules, labour law requirements (the “core set of rules”) and European directives. For HR directors or international mobility managers, understanding these interactions is essential in order to secure operations and avoid significant legal and operational consequences.

What determines the duration of the posting of workers in France?

The posting of workers combines at least three distinct dimensions: immigration rules (the employee’s status and residence permit), national labour law (application of the “core set of rules” and, beyond a certain period, a quasi-complete regime), and European regulations (the Posted Workers Directive).

These frameworks do not always follow the same logic. What may be permitted under immigration rules (for example, the duration of a visa or residence permit) does not prevent the application of French labour law requirements.

Duration of posting depending on nationality and status (practical rules)

Duration of posting for EU / EEA / Swiss nationals

EU nationals are not subject to the same entry and residence restrictions that apply to third-country nationals. As a result, there is no immigration “maximum duration” as such.

However, the rules governing the posting period derive from the European directive on posted workers and its transposition into French law, and monitoring the temporary nature of the assignment remains a key factor.

Third-country nationals: duration depends on the immigration status

For non-EU employees, the permitted duration depends on the residence permit or authorisation granted.

ICT posted employee (intra-company transfer)
Residence permits linked to this status may cover long-term assignments (multi-year residence permits valid for up to 3 years depending on the immigration situation). These rules are governed by the CESEDA with regard to immigration.

ICT trainee
The ICT trainee visa duration is linked to the internship agreement (often 1 year, with limited possibilities for extension under specific conditions).

International provision of services (IPS)
Many posting operations, particularly in sectors such as construction or service provision assignments, are structured around an initial period often of approximately 12 months. Renewals are possible but remain subject to immigration rules and the conditions of the prior declaration.

Practical note: the existence of an immigration residence permit allowing a 36-month assignment in France does not automatically mean that the entirety of French labour law does not apply. The “core set of rules” and the 12-month rule under labour law remain independently applicable.

The 12-month posting threshold: concrete legal consequences

Under French labour law, the initial duration of the posting period represents a key milestone.

Posting ≤ 12 months (initial period)
The employer benefits from the application of the “core set of rules” — a minimum set of protective provisions (minimum remuneration, working time, rest periods, health and safety, etc.). The employer is not yet subject to the full scope of French labour law.

Posting > 12 months
Unless a justified declaration is submitted requesting an extension of the core set of rules regime (possible via the SIPSI platform for up to an additional 6 months), from the 13th month onwards the employee becomes a “long-term posted worker”. In this case, almost all French rules regarding working conditions and employment apply (with limited exceptions such as vocational training, termination of the employment contract and supplementary pension schemes).

Employers must therefore prepare for additional obligations.

Can the application of the “core set of rules” be extended beyond 12 months?

Yes. Employers of posted workers may submit a justified declaration via the SIPSI platform requesting that the application of the core set of rules be extended beyond the initial 12-month period.

However, this extension cannot exceed 6 additional months. The total duration covered by the core set of rules regime is therefore capped at 18 months.

Checklist: points to verify to determine the duration of a posting and ensure compliance

• Identify the employee’s immigration status before the assignment (ICT, trainee, EU national, etc.).
• Define the duration of the assignment and anticipate the 12-month threshold (internal process alert).
• If the assignment exceeds 12 months, prepare the justified declaration via SIPSI before the 12th month in order to request the extension of the core set of rules (maximum +6 months).
• Document and retain the required records (payslips, working time records, employment contract, etc.).