Senior employment obligations 2026: negotiation, diagnosis and penalties for 300+ employee companies

Quick answer. Companies with at least 300 employees must engage in mandatory negotiation on employment and working conditions of experienced workers at least once every four years (Article L. 2242-2-1 of the Labour Code). This obligation, transposed by the Law of October 24, 2025, includes a mandatory diagnostic assessment and a financial penalty (contribution reduction on old-age insurance) for non-compliance. This is distinct from the gender equality index and centres on collective dialogue rather than publication of a scored benchmark.

On November 14, 2024, French labor market partners signed a national interprofessional agreement (ANI) to support senior worker employment and evolve social dialogue. This accord reflects a macroeconomic concern: as the active population ages and pension system pressure increases, maintaining and expanding employment of workers aged 55+ has become essential.

Law n° 2025-989 of October 24, 2025, published in the Official Journal on October 25, 2025, transposes this agreement into French law. Unlike the gender equality professional index—which imposes annual calculation and publication of a score—the new senior employment obligation centres on collective negotiation and diagnostic documentation. The goal is not to publish a "senior index" with a numerical score, but to document the situation of experienced workers and engage dialogue with worker representatives and unions.

This obligation applies to:

• Companies with at least 300 employees (counted under standard labor law definitions);
• Corporate groups whose combined headcount reaches 300 or more.

Companies below 300 employees are not required but may voluntarily engage in such negotiation.

Our observation: The 300-employee threshold marks a major regulatory turning point. Many companies reaching this milestone have not anticipated the new social obligations that accompany growth. A jump from 295 to 305 employees should trigger an audit of negotiation obligations (seniors, gender equality) to avoid later adjustment risks.

Negotiation frequency#

• The negotiation on the employment of experienced workers must be opened at least once every four years (Article L. 2242-2-1 of the Labour Code), in addition to existing mandatory negotiations;
• a procedural agreement may set the schedule and topics without reducing this minimum frequency.

Any agreement must include:

• Quantified objectives;
• Concrete actions;
• Implementation timeline;
• Monitoring indicators.

Key point: Where an agreement already covers senior employment, its terms apply; otherwise the company must open the negotiation within the four-year cycle. Transitional rules provide for application from 1 October 2026 for ongoing agreements. Check your local timeline.

Before negotiation begins, the employer must prepare a diagnostic assessment of experienced workers' situation. Decree n° 2025-1348 of December 26, 2025 specifies the content.

Diagnostic domains and required indicators#

Data sources include the economic, social and environmental database (BDESE) and occupational risk assessment documents (DUERP).

In practice: the diagnostic is not a published index or visible score. It is an internal analytical file presented by the employer to worker representatives (union delegates, works council) to ground negotiation. Content may vary by sector agreement, but must address these domains.

Once the diagnostic is prepared, negotiation covers:

1. Recruitment of experienced workers

• Recruitment targets for workers aged 55+
• Removing age-related barriers during hiring
• Initial training or knowledge transfer to facilitate integration

2. Retention in employment

• Prevention of occupational fatigue
• Ergonomic and organisational accommodations
• Access to therapeutic part-time, career transition leave

3. Improvement of working conditions

• Adapt jobs to age and capacity
• Reduce occupational strain factors
• Support internal mobility

4. End-of-career and retirement transition

• Phased hour reduction (cumulative retirement-employment)
• Sabbatical arrangements, structured exits with financial support
• Succession and knowledge transfer planning

5. Knowledge and skill transfer

• Mentoring of younger workers by seniors
• Intergenerational initiatives
• Documenting expertise before departure

If no agreement is reached within three months of negotiation, the employer must establish an annual action plan to support experienced worker employment. This plan must:

• Enumerate concrete actions (recruitment, training, job adaptation);
• Define timeline and responsibilities;
• Set measurable monitoring indicators;
• Be communicated to worker representatives and works council.

The plan must be more than a declaration of intent: it must contain dated, quantified commitments verifiable by labor inspectors.

The malus on old-age insurance contributions#

Failure to conduct negotiation or implement an action plan exposes the company to a penalty reduction on employer contributions for old-age and survivor insurance. This mechanism appears in Article L. 241-3-3 of the Social Security Code (introduced by the 2026 Social Security Financing Law).

Penalty rate: As of June 2026, the exact rate has not yet been fixed by decree. The law specifies that the malus will be determined "according to efforts observed in the company toward senior employment, and reasons for its failure, based on clear criteria." A future decree will specify the scale and application procedures.

Other enforcement measures#

Beyond the financial penalty, non-compliance may result in:

• Labor inspector citation (administrative fine);
• Orders to remedy within a deadline;
• Further inspection revealing continued non-compliance: escalated penalties.

Many confuse the new "senior" obligation with the gender equality professional index. These are two separate instruments:

Both instruments coexist. A company with 60 employees must publish its gender equality index; a company with 350 employees must both publish the gender equality index AND undertake senior negotiation (plus diagnostic).

Some industry branches may have sectoral agreements that adapt or supplement the general obligation. For example:

• Public sector: modalities may differ (public service collective agreement).
• Automotive, chemicals, etc.: if a sectoral agreement exists, it takes precedence and may impose additional obligations.

Check with your industry federation or branch union to confirm applicable collective agreements.

1. Tight timeline for companies near the 300-employee threshold Growth crossing the threshold immediately triggers future obligations. Do not leave this obligation to be discovered by labor inspection.

2. Incomplete diagnostic The diagnostic is not simple headcount. Authorities expect structured analysis with sourced data (payroll records, training register, etc.). A poor diagnostic may be deemed insufficient by inspectors.

3. No published "senior index" (common confusion) Unlike the gender equality index, there is no prescribed calculation to publish. Press coverage using the word "index" creates confusion. The obligation is negotiation, not publication of a score.

4. No Plan B if agreement fails If no agreement is reached after three months, the annual action plan is not optional. Its absence may constitute aggravated non-compliance.

5. Malus: Amount pending but certain The exact malus rate is not yet fixed but will be specified by decree before end-2026. Failing to budget for this additional cost would be an error.

As certified public accountants and auditors, we observe that senior employment negotiation obligations are frequently underestimated by company management. Confusion with the gender equality professional index—which does impose publication of a score—leads many employers to believe nothing needs publishing, and therefore nothing needs doing.

We recently audited a company with 310 employees who was unaware of the senior negotiation requirement. During 2025 year-end audit, the compliance review revealed absence of diagnostic, negotiation, and action plan. Management had to rush to correct this. Should a malus apply, this company will face retroactive exposure from October 2025.

The wake-up call: senior employment negotiation is not an isolated HR task. It touches overall employment strategy (recruitment, training, job adaptation, career endings). Good companies see this as an opportunity to structure aging workforce policy, not as an administrative burden.

Hayot Expertise advice: If your headcount reaches or exceeds 300 employees, or you are a corporate group above this threshold, audit your compliance with this obligation. Establish a diagnostic of experienced workers before end-2026 (prudent timing before the first penalties apply). Inform your works council of the new obligation and engage transparent dialogue on senior employment. This proactivity avoids financial penalty and builds positive culture around retaining workers aged 55+. We can support you through diagnostic preparation, negotiation readiness, and documentation.