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Dismissal during sick leave in Luxembourg

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Can you be fired in Luxembourg while sick? Rules and regulations on sick leave and employee rights

In Luxembourg, firing someone while on sick leave can be a complicated situation. Both employers and employees need to follow specific, related rules. In this article, we will look into these rules through an overview regarding sick leave in Luxembourg, but also termination details, long-term sick leaves, and any legal ramifications. 

What does ‘sick leave’ actually mean in Luxembourg?

🔔 Notification of sickness and medical certificate

  • First day of sickness: Employees must inform the employer of their illness, by any means possible (ex. phone, SMS, email, etc.)
  • Up to three days: The employee must submit a medical certificate (Certificat d’Incapacité de Travail, or “CIT”) to the employer and the CNS by the third working day they have been sick.
  • More than three days: Being treated as prolonged leave.

💶 Salary

  • Employers cover up to 77 days of sick leave with full salary over an 18‑month reference period.
  • After that, the CNS covers a total of up to 78 weeks of sick leave. 
  • Upon expiration of those 78 weeks granted by CNS, the employment contract automatically ends the same day.

🛡️ Protection against wrongful termination

  • In Luxembourg, employees are protected from termination for 26 weeks of <continuous> sick leave.
  • Even after 26 weeks, employers can only dismiss with ‘real and serious cause’, such as misconduct including constant tardiness, bad performance, embezzlement, sexual harassment, physical or verbal abuse, and more.

When can you get fired while on sick leave?

Immediate termination due to serious misconduct

If employees fail to notify their absence, don't submit the CIT in time, or commit a crime or deliberate serious misconduct, they lose any employee protection and rights, and can be fired immediately due to ‘serious fault’ ("faute grave").

Exception due to sickness during probation period

If an employee falls sick during their probation period and the sick leave exceeds its duration, the probation period extends up to one month. If the employee is still sick beyond this extension, the employer may then end the contract.

Medical checks initiated by the employer

Employers (or the CNS via Luxembourg CNS medical check or CNS control appointment Luxembourg) may request a medical check if there's doubt about the employee’s sickness:

  • If employees refuse a check without justification, they can be terminated with immediate effect.
  • If the exam finds the employee fit for work before the 26‑week limit, the employer may dismiss them with notice.

Disruption of business due to repeated sick leaves

Even if a sick leave is valid and documented, if it happens continuously or constantly, creating operating issues for the business, the employer can apply for termination after the 26-week protective period, with the equivalent notice and reasoning, for example malfunction of a department.

What happens after 78 weeks
If within 104 weeks, the employee has used 78 weeks of sick leave in Luxembourg, the work contract can be terminated automatically, without notice or reasoning. This termination is statutory connected to sick leave allowance, so the employer doesn’t have to take action.

Employee rights

  • ✅ Compliance: If the employee notifies the employer and submits a medical certificate within deadline, then they are protected.
  • 🏥 Legitimate sick leave: The employee is protected for 26 continuous weeks and termination might occur only for exceptional organizational reasons, such as restructuring or serious disruption of business.
  • 🩺 Medical checks: The employee has the right to request a second and third medical opinion, if the employer doubts the illness.
  • ⛔ Automatic termination: After 78 weeks, contract ends without notice.
  • 🚧 Illness caused by work: If the sickness is caused by the employer/workplace/tasks (such as work accident, harassment, burnout) there are no grounds for termination, and the employer needs to assume responsibility.

Employer requirements

  • 📢 Notice: For termination after documented sick leave the employer is obliged to give legal notice.
  • 📝 Cause: He/she also has to give an objectively accepted reason for termination.
  • 🩺 Medical check: For any doubt regarding the employee’s sickness, the employer has the right to ask for a CNS medical check or a check at a doctor of the employer’s choice.
  • 👨‍⚕️ Home check: For further examination of the matter, in case of more doubts, the employer has the right to request a home inspection by the CNS, between 8AM and 9PM to confirm the employee’s incapacity.
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Summary

  • During first 26 weeks sick leave: No termination can occur unless in case of serious misconduct or non-delivery of requested medical certificate.
  • After 26 weeks: Termination can occur with notice, if the employee’s absence seriously disrupts business operations.
  • After 78 weeks: Work contract ends automatically by law.
  • Automatic immediate termination: Immediate termination is permitted at any time for serious misconducts such as criminal acts or fake certificates.
  • CNS checks: Employers may request both medical and administrative controls to verify the accuracy of sick leave.

Examples

Scenario 1: Short sick leave
Employee sick for four days, submits medical certificate the third day, no other issues: The employee is protected, no termination occurs.
Scenario 2: Refusal to attend CNS control
Employee refuses or skips a CNS‑requested home visit without good reason: Protection revoked, termination possible.
Scenario 3: Prolonged sick leave
Employee on sick leave for 29 weeks. Employer requests medical check, confirms continuous justified illness but business operations disruption is serious: Termination with legal notice is allowed at this point.
Scenario 4: Reached 78 weeks of sickness
If the employee reaches 78 weeks of sick leave, they have no more state sick leave allowance and their work contract can end automatically, without notice, or official termination by the employer, also losing their severance package rights.

Conclusion

In Luxembourg, it is not easy to fire an employee while he/she is on sick leave, because employees are heavily protected by the state. Although, some strict rules apply for employees as well and their initial state protection lasts up to 26 weeks of absence. After that they might get terminated with legal notice and a proper justification, and after 78 weeks the contract ends automatically by law. Both employees and employers need to follow specific steps and be compliant in order to keep their rights.

It might seem unfair to fire someone while on sick leave, but if the absence disrupts normal business operations is a very valid reason. While the Luxembourgish State protects the employees with various rules and regulations when it comes to sickness-related termination, there is a limit to those too, in order to protect businesses as well, to an extent.

Hopefully this article answered most of those questions and gave a proper overview of sick leave in Luxembourg.

FAQ

Can I be fired while on sick leave in Luxembourg?

Yes, but only in certain cases: serious misconduct including criminal actions, medical check denial or more than 26 weeks of sick leave with notice and proper justification of disruption of business.

Can my contract be terminated automatically after a long sick leave?

If your sick leave exceeds 78 weeks within a period of 104 weeks, then yes, your contract will be automatically terminated by law, without notice, severance or employer official termination.

Why would an employer request a home CNS visit?

If the employer, even after a CNS medical check, is still in doubt regarding the employee’s illness, he/she has the right to request a CNS control appointment at home, in order to verify the level of illness. In case of denial, it might lead to termination.