Managing Illness in the Workplace: What Employers Need to Know
Illness in the workplace is a regular part of running any organisation, but managing it well is essential to meeting both your employment law and your health and safety obligations. Getting this balance right supports staff, protects productivity, and reduces legal risk.
Employment Law
From an employment law perspective, employers must approach illness issues fairly, reasonably, and with good faith. Below are four key points.
Use sick leave correctly
Employees are entitled to sick leave when they are unwell or caring for a dependant. Employers can request medical proof after three consecutive days of absence (or earlier if the employment agreement allows and the employer covers the cost).
Avoid making assumptions about health conditions
Employers must not jump to conclusions about an employee’s ability to work. Before considering any change to duties, performance expectations, or employment status, seek medical information through a fair process, always with the employee’s consent.
Manage long-term or repeated illness carefully
Where illness impacts an employee’s ability to perform their role, employers may need to start a medical incapacity process. This must include:
- Clear communication
- Access to relevant medical information
- Consideration of reasonable adjustments
- Genuine consultation before decisions are made
A poor‑process incapacity dismissal is a most common sources of unjustified dismissal claims.
Protect employee privacy
Health information is sensitive information. Collect only what is reasonably necessary, store it securely, and share it strictly on a need‑to‑know basis.
Health and Safety Law
Under the Health and Safety at Work Act, businesses must ensure the health and safety of workers so far as is reasonably practicable. This extends to managing risks associated with illness.
Prevent the spread of illness in the workplace
Employers must take reasonable steps to ensure unwell staff do not pose a risk to others, particularly in roles involving vulnerable clients or high‑risk environments.
Address psychosocial risks
Work‑related stress, fatigue, burnout and mental illness are recognised workplace hazards, and WorkSafe expects businesses to manage them like any other risk. That includes:
- Monitoring workload
- Ensuring adequate staffing levels
- Providing access to support
- Responding early to signs of stress or deterioration
Support a safe return to work
A staged or modified return to work may be reasonably practicable and can reduce future injury or illness. Collaboration between the employer, employee, and medical professionals is key.
Lead by example
Managers play an important role in building a culture where people feel safe to stay home when sick, take breaks, and disclose health issues early.
Where the Two Frameworks Meet
Employment law focuses on fair process and rights, while health and safety law focuses on risk management. The crossover is significant:
- A failure to manage stress or workload can become both a bullying/personal greivance risk and a WorkSafe issue.
- Requiring an unwell employee to work can breach health and safety obligations and create an unjustified disadvantage.
- Managing illness well supports productivity, wellbeing, and retention.
Need Help?
We regularly assist clients with medical incapacity processes, managing fatigue and stress in the workplace, bullying policies and policy reviews. If you’d like advice or tailored training for your managers, our team can help.
Disclaimer: We remind you that while this article provides commentary on employment law, health and safety and immigration topics, it should not be used as a substitute for legal or professional advice for specific situations. Please seek legal advice from your lawyer for any questions specific to your workplace.
