Working While on Sick Leave – Legal Framework, Risks & HR Tips

A medical sick note (AU certificate) is not a work ban — it is a prognosis about the expected course of illness. Employees who recover sooner than expected are generally permitted to return to work voluntarily, without needing a formal "fitness-to-work" certificate. Employers may not pressure employees into returning early, but they can send them home based on their duty of care. Important: anyone who works while still on sick leave should inform both their employer and their doctor's practice — and keep an eye on their entitlement to sick pay.

What Does Working While on Sick Leave Mean Legally?

The AU Certificate: A Prognosis, Not a Work Ban

The Arbeitsunfähigkeitsbescheinigung (AU) — commonly referred to as a sick note or sick certificate — serves two purposes: it confirms that an employee was unable to perform their duties at the time of issue, and it provides a medical estimate of how long that condition is expected to last. A prognosis can turn out to be overly cautious. An employee who recovers earlier than anticipated is therefore not obliged to wait out the full duration of the sick leave.

There is no statutory provision in German law that explicitly prohibits working while an AU certificate is still in effect. The Continued Remuneration Act (Entgeltfortzahlungsgesetz, EntgFG, §3 and §5) governs the right to continued pay during illness but makes no statement about whether employees may actively work. From an insurance law perspective, there are no disadvantages either: under SGB V (§5 para. 1 no. 1) and SGB VII (§§2 para. 1 no. 1, 8 para. 2), both statutory health insurance and accident insurance — including commuting accident coverage — remain fully in place upon early return.

No Obligation to Return — But No Prohibition Either

The key principle is voluntariness: early return to work is only permissible if the employee themselves wishes to return and genuinely feels fit for work. Employers may neither compel nor pressure this decision. The same applies to any expectation of being reachable by phone or email during sick leave — even in the case of urgent projects or specialist knowledge gaps, there is no legal obligation to remain contactable.

A so-called "fitness-to-work certificate" — a formal medical document releasing an employee back to work — does not exist in the German healthcare system. There is therefore no requirement to present such a document before returning early. It is, however, advisable to inform the doctor's practice of the earlier recovery so that the original AU certificate can be corrected or shortened. This simplifies communication with the health insurance fund and the employer.

When Is Working While on Sick Leave Not Permitted?

Recovery-Impairing Conduct: Risks and Case Law

Even though returning to work early is generally permitted, there is a clear boundary: the return must not jeopardise recovery or worsen the medical condition. This principle applies not only in the workplace but to all behaviour during a period of sick leave. Employees who engage in physically demanding activities while holding a medical certificate of incapacity risk employment law consequences.

A frequently cited example: the Regional Labour Court of Rhineland-Palatinate ruled on 11 July 2013 (10 Sa 100/13) that the summary dismissal of an employee was lawful after he participated in a strenuous house renovation during his sick leave. The court found strong grounds to suspect that the incapacity had been feigned.

Special Case: Statutory Employment Bans

The general principle of voluntariness has legal exceptions. Pregnant employees may be subject to employment bans under the Maternity Protection Act (Mutterschutzgesetz, MuSchG) that cannot be overridden by the employee's own decision. In such cases, working — even when feeling well — is genuinely prohibited.

Duty of Care: What Employers Need to Know

The Right and Obligation to Send Employees Home

Even if employees return voluntarily and on their own initiative, employers are not required to simply accept it. Under §618 BGB and §3 ArbSchG, employers carry a duty of care towards all employees — which includes assessing whether an early return is medically justifiable.

In practice, this means: if someone appears unwell or visibly weakened in the workplace, the manager may send that person home. In the case of contagious illnesses — such as gastrointestinal infections or influenza — doing so is actually required in order to protect other team members. An employer who deploys a clearly unfit employee and an incident occurs as a result risks liability for breach of the duty of care.

Involving the Occupational Health Physician: When Does It Make Sense?

If the employee's outward appearance and their own assessment diverge, the company's occupational health physician can be brought in. This neutral party can assess the employee's health independently and make a recommendation. This is particularly useful when there is genuine doubt about fitness for work, or when specific safety requirements apply — for example, operating machinery or working in transport roles.

Important: employers may not conduct unannounced welfare visits at the homes of employees on sick leave without specific cause. Such measures are only permissible where there are concrete grounds for suspicion.

Special Cases: Remote Work, Part-Time Return, Posted Workers

Remote Work While on Sick Leave — What Applies?

Working from home during an active sick leave period is subject to the same rules as returning to the office. There is no statutory special provision that either privileges or restricts remote work during an AU period. The same conditions apply: voluntariness, no risk to recovery, and notification of the employer.

In practice, remote work can make it tempting to take care of seemingly "light" tasks from home — even when the employee should still be resting. HR professionals should make it clear in their communication and leadership culture that being ill means recovering, not continuing to work from home.

Part-Time Return and Sick Pay

Any employee who returns to work early — even for just a few hours — is considered fit for work from that point onwards. This has an important consequence for insurance law: the entitlement to sick pay (Krankengeld) is suspended for the duration of the work performed. Anyone already receiving sick pay for a prolonged illness who works even a few hours should notify their health insurance fund in advance to avoid unwanted repayment demands.

This is distinct from the graduated reintegration programme (stufenweise Wiedereingliederung) under §74 SGB V: here, the sick note formally remains in place while the affected person gradually returns to working life with reduced hours. In this case, sick pay is generally continued. A written reintegration plan is required, to which both the employer and the treating physician must consent.

Insurance Coverage Upon Early Return

A common misconception is that employees lose their insurance coverage when they return before the sick leave expires. This is incorrect: both statutory health insurance (§5 para. 1 no. 1 SGB V) and accident insurance (§§2 para. 1 no. 1, 8 para. 2 SGB VII) remain fully intact — including commuting accident coverage. This applies equally to brief or part-time returns.

The only area requiring caution is sick pay: once an employee resumes work, this entitlement is suspended. If in doubt, it is advisable to consult the health insurance fund before returning early.

Presenteeism: The Underestimated HR Risk

Beyond the individual legal question, there is an organisational dimension that HR professionals should not underestimate: presenteeism. This term describes the phenomenon whereby employees are physically present at work — in the office or working remotely — but are not fully productive due to illness.

The DAK Health Report 2024 shows that sick leave rates in Germany remain at a persistently high level. At the same time, a cross-national study by TU Chemnitz, the University of Groningen, and the Hochschule Bonn-Rhein-Sieg found that exhaustion levels rise significantly in weeks where employees work while ill — and remain elevated in subsequent weeks as well. Coming to work sick therefore costs more energy in the long run than a full recovery.

Add to this the contagion risk: bringing a flu-like illness into the office endangers the entire team. The Techniker Krankenkasse found in a study on presenteeism in mobile working environments that even digital work in a home office setting can facilitate the spread of exhaustion and overload across a team.

For HR and managers, the takeaway is clear: a culture that prioritises presence over health produces higher absenteeism in the long term, not lower. The topic is closely connected to employee retention and employee wellbeing, and cannot be separated from leadership styles and company culture.

Checklist for HR and Managers

When an employee wishes to return early:

• Return is voluntary — no pressure, no coercion
• Hold a brief conversation: does the person genuinely feel fit for work?
• For contagious illnesses: critically assess a return to the office; consider remote work as an alternative
• Employee should inform their employer (recommended, not legally required)
• If in doubt: involve the occupational health physician
• Inform the doctor's practice so the AU certificate can be corrected
• If sick pay is already being received: notify the health insurance fund in advance
• Documentation: note the date and circumstances of the early return

What employers must not do:

• Pressure or coerce employees into returning
• Require availability during sick leave
• Conduct unannounced home visits without cause
• Deploy employees who are clearly still unwell

Frequently Asked Questions About Working While on Sick Leave

Is it permitted to work while on sick leave?

Yes, in principle. An AU certificate is a medical prognosis, not a work ban. Employees who recover sooner than expected may voluntarily return to work — provided that their recovery is not put at risk. Employers may not require the return.

Do I need a "fitness-to-work" certificate from my doctor?

No. No formal fitness-to-work certificate exists in the German healthcare system. It is advisable to inform the doctor's practice of the earlier recovery so that the AU certificate can be adjusted — but this is not a legal requirement.

Can the employer send me home?

Yes. Employers are both entitled and, in certain cases, obliged under their duty of care (§618 BGB) to intervene if an employee arrives at work while on sick leave but is clearly not yet fit — particularly in cases of contagion risk. The occupational health physician can be consulted if needed.

Is it allowed to work from home while on sick leave?

Legally, the same rules apply as for returning to the office: voluntariness, no risk to recovery, and informing the employer. There is no separate exemption for remote work during an AU period.

What happens to sick pay if I return early?

Anyone who resumes work is considered fit for work — the sick pay entitlement is suspended for that period. Exception: under the graduated reintegration programme (§74 SGB V), the sick note remains in place and sick pay is generally continued. In cases of uncertainty, the health insurance fund should be consulted in advance.

Am I still insured if I return early?

Yes. Both statutory health insurance (§5 para. 1 no. 1 SGB V) and accident insurance (§§2 para. 1 no. 1, 8 para. 2 SGB VII) remain fully intact — including commuting accident coverage.

What is recovery-impairing conduct, and what are the consequences?

Recovery-impairing conduct refers to activities during sick leave that delay or worsen the healing process. In extreme cases, this can justify summary dismissal. The Regional Labour Court of Rhineland-Palatinate upheld the dismissal of an employee in a ruling dated 11 July 2013 (10 Sa 100/13), after he participated in a physically demanding house renovation while on sick leave.

What is presenteeism, and why is it an HR problem?

Presenteeism describes the phenomenon of employees being present at work despite illness, but not fully performing. According to a study by TU Chemnitz and the University of Groningen, exhaustion levels rise significantly in weeks with presenteeism and remain elevated afterwards. This leads to productivity losses, increased contagion risk, and higher long-term absenteeism — none of which benefits the organisation.

Conclusion

Working while on sick leave is generally permitted in Germany — but only voluntarily, and only when the person genuinely feels fit and their recovery is not at risk. Employers may not exert pressure, nor can they prevent an early return if the employee is visibly well. At the same time, the duty of care requires sending home those who are clearly still unwell or contagious.

For HR professionals, this topic goes beyond a legal question. Presenteeism generates higher long-term absenteeism and team exhaustion. A healthy organisational culture — one that enables recovery rather than enforcing presence — delivers better results.

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Sources

• Continued Remuneration Act (EntgFG), §3 and §5. Federal Ministry of Justice, 2024. https://www.gesetze-im-internet.de/entgfg/
• Civil Code (BGB) §618 — Duty of care. Federal Ministry of Justice, 2024. https://www.gesetze-im-internet.de/bgb/__618.html
• SGB V §5 para. 1 no. 1 — Statutory Health Insurance. https://www.sozialgesetzbuch-sgb.de/sgbv/5.html
• SGB VII §2 para. 1 no. 1, §8 para. 2 — Statutory Accident Insurance. https://www.gesetze-im-internet.de/sgb_7/
• Occupational Health and Safety Act §3 (ArbSchG). Federal Ministry of Justice. https://www.gesetze-im-internet.de/arbschg/__3.html
• Regional Labour Court of Rhineland-Palatinate, ruling of 11.07.2013 – 10 Sa 100/13.
• DAK Health Report 2024. DAK-Gesundheit, 2024. https://www.dak.de/dak/gesundheit/gesundheitsreport/
• TK Study: Presenteeism in an Increasingly Mobile Working World. Techniker Krankenkasse. https://www.tk.de/firmenkunden/service/fachthemen/versicherung-fachthema/trotz-krankschreibung-arbeiten-2170222
• Haufe.de: Working despite sick leave — permitted or not? https://www.haufe.de/personal/arbeitsrecht/arbeiten-trotz-krankschreibung-was-ist-erlaubt_76_397212.html