An employee declared with an occupational disease receives daily allowances that are higher than those for ordinary sick leave. This change in regime regularly causes discrepancies between what the company has already paid (salary maintenance, supplementary insurance) and what the CPAM actually reimburses. The result: an overpayment, sometimes discovered several months after the fact, whose management exposes the employer to concrete financial, social, and legal risks.
Discrepancy between IJSS sick leave and IJSS occupational disease: the recalculation trap
When a work stoppage shifts from “ordinary illness” to “occupational disease,” the CPAM recalculates the daily allowances. The compensation rate rises from about 50% of the reference salary to a significantly higher level. This recalculation is retroactive.
Meanwhile, the company often continues to pay salary maintenance, and the insurance has supplemented based on the old scale. Once the adjustment is made by the CPAM, the amounts already paid exceed what the employee should have received. This is where the overpayment appears.
The situation in the case of overpayment of occupational disease insurance benefits becomes even more complicated when the employer practices subrogation, meaning they receive the IJSS directly from the CPAM instead of the employee. In this case, the retroactive recalculation can result in a CPAM payment that exceeds what the employer had advanced, or conversely, a differential that is difficult to allocate among the three parties (CPAM, insurance, company).
Financial risks of overpayment of insurance for the company
The first reflex of many employers is to deduct the overpayment directly from the next payslip. This approach poses an immediate legal problem.
The limit of salary compensation
The Labor Code strictly regulates salary deductions. The deduction cannot exceed the garnishable portion of the salary, even if the employee must actually reimburse. Withholding the entire overpayment at once exposes the company to a dispute in labor court, or even a conviction for abusive withholding.
The accounting impact in case of non-recovery
When the employee contests the overpayment or leaves the company before reimbursing, the amount remains as a receivable. For small businesses, an overpayment of several thousand euros directly impacts cash flow. The company must then initiate a recovery procedure, with the costs and delays that this entails.
Payroll and insurance configuration errors: an increasing operational risk
Recent regulatory changes increase the likelihood of overpayments for companies. As of April 1, 2025, the calculation ceiling for IJSS sick leave has been lowered from 1.8 to 1.4 times the minimum wage. This change modifies the coordination between daily allowances, salary maintenance, and supplementary insurance.
Specifically, payroll software and insurance contracts must be updated to reflect this new ceiling. Any company that has not adjusted its settings risks calculating supplements based on outdated information, thus overpaying.
Starting September 1, 2026, the duration of work stoppages will be capped. This measure will require employers and their insurers to review the coverage rules for long-term stoppages, particularly those related to occupational diseases. The transitional period between the two regimes will be conducive to calculation errors.
Companies that manually manage the coordination between CPAM, insurance, and payroll are the most exposed. Here are the points of vigilance:
- Check that the payroll software correctly incorporates the new IJSS ceiling applicable since April 2025, especially for employees whose stoppage began before this date
- Ensure that the insurance contract includes a coordination clause with IJSS for occupational diseases (and not just ordinary illnesses)
- Implement specific monitoring of cases undergoing reclassification from illness to occupational disease, to anticipate the retroactive recalculation
- Keep all CPAM statements and insurance records for each affected employee, to justify each payment
Labor court disputes and obligation of transparency towards the employee
Have you ever tried to read a payslip after a retroactive recalculation related to an occupational disease? Most employees do not understand the amounts that appear, even less when they are asked for a reimbursement.
The company has an obligation of transparency. Every reimbursement request must be accompanied by a clear statement, detailing the amounts paid by each organization (CPAM, insurance, employer) and the exact reason for the overpayment. Without this justification, the employee may refuse to reimburse and take the matter to labor court.
Judges systematically examine two points:
- Did the employer provide a detailed justification for the overpayment before proceeding with a deduction or requesting reimbursement?
- Does the salary deduction comply with the garnishable portion provided by the Labor Code?
- Is the statute of limitations (three years for salary claims) respected?
An employer who cannot prove the reality of the overpayment with precise documents risks being ordered to return the withheld amounts, plus any potential damages.
Collective insurance and occupational disease: check the contract before the incident
Not all collective insurance contracts treat occupational diseases the same way. Some provide a supplement calculated based on IJSS for ordinary illnesses, without an adjustment clause in case of reclassification. The absence of a coordination clause between IJSS for occupational accidents/diseases and insurance is the primary cause of structural overpayment.
The company should review the general conditions of its insurance contract on three specific points: the calculation method for the supplement in case of occupational disease, the mechanism for retroactive adjustment, and the reimbursement procedure for the overpayment (who reimburses whom, and within what timeframe).
The overpayment in insurance during an occupational disease is not an isolated accident. It is a predictable dysfunction whenever multiple compensation flows intersect without rigorous coordination. A company that waits for the incident to discover the flaws in its payroll settings or insurance contract exposes itself to a cumulative risk of financial, legal, and relational issues with its employees.