Mental Health Sick Leave Explained

TL;DR

• Mental health sick leave is legal in Australia. Employees use personal/carer's leave under the Fair Work Act 2009, as there is no separate category.
• Full-time employees get 10 paid days per year. Part-time is pro rata. Casuals get no paid entitlement.
• You do not have to disclose your diagnosis. Telling your employer you are unwell and unfit for work is legally sufficient.
• Medical certificates do not need to specify the condition, only that you are unfit for work.
• Employers cannot fire or penalise you for taking lawful mental health leave.
• When leave runs out, annual leave, unpaid leave, or workers' compensation may apply.
• Employers must proactively manage psychosocial hazards, not just approve absences.

What Is Mental Health Sick Leave?

Mental health sick leave is time taken off work because an employee is unfit to work due to a psychological condition, including stress, burnout, anxiety, depression, or another mental health issue. In Australia, it is not a standalone leave category. Instead, it is covered under personal/carer's leave (commonly called sick leave) within the National Employment Standards (NES) of the Fair Work Act 2009.

This matters practically: mental health and physical health are treated identically under Australian law. An employee who cannot work because of severe anxiety has exactly the same leave rights as one who cannot work because of a broken wrist. The condition does not need to be formally diagnosed for the leave to be valid. The employee simply needs to be genuinely unfit to attend work.

According to a PwC and Beyond Blue analysis, untreated mental health conditions cost Australian workplaces $10.9 billion per year: $4.7 billion through absenteeism and $6.1 billion through presenteeism (employees who are physically present but mentally unable to perform). More recently, the Productivity Commission estimated the absenteeism cost alone had risen to $11.5 billion by 2023-24. Supporting mental health leave is not a cost to business. Refusing to support it is.

Is Mental Health Leave the Same as Sick Leave in Australia?

Yes. For the purposes of Australian employment law, taking a mental health day is the same as taking a sick day. There is no separate legal category called "mental health leave" or "stress leave" in the NES. When an employee is unfit for work due to a mental health condition, they take personal/carer's leave, the same entitlement used for physical illness or injury.

"Stress leave" and "mental health leave" are informal terms that describe why someone is taking personal leave. They are not distinct entitlements with different rules. Some employers offer additional dedicated mental health days as a workplace benefit above the NES minimum, but the legal baseline is personal/carer's leave.

Who Is Entitled to Mental Health Sick Leave?

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For employees under an Enterprise Bargaining Agreement (EBA), entitlements may be higher than the NES minimum. Always check your agreement.

Casual workers face the most significant gap in Australia's leave framework. While they are not entitled to paid personal leave, they are not without options. Unpaid carer's leave may be available in some circumstances, and if their psychological condition was caused or aggravated by work, a workers' compensation claim may be possible (see below).

What Does "Unfit for Work" Mean?

"Unfit for work" is the legal standard that entitles an employee to take personal leave, and it applies equally to mental and physical health conditions.

Under the Fair Work Act 2009, personal leave can be taken when an employee "is not fit for work because of a personal illness, or personal injury, affecting the employee." There is no legal distinction between physical and mental illness for this purpose.

The key distinction is between being genuinely unfit to work and simply not wanting to work that day. If an employee is experiencing symptoms of stress, anxiety, burnout, or another mental health condition that make them unable to safely or reasonably perform their work, the legal threshold is met. Taking a day off because you feel low, overwhelmed, or mentally exhausted qualifies, provided those symptoms are real. Taking a day off simply because you would rather not be at work does not.

Common Reasons for Taking Mental Health Sick Leave

Employees take mental health leave for a wide range of reasons. Common situations include:

Workplace stress and burnout. Sustained high workloads, unrealistic expectations, or toxic environments can produce chronic stress that crosses into a clinical condition. Signs of employee burnout include emotional exhaustion, depersonalisation, and reduced efficacy, and the condition is increasingly recognised as a serious occupational health issue.

Diagnosed mental health conditions. Depression, anxiety disorders, PTSD, OCD, ADHD, eating disorders, and other diagnosed conditions may require time off for treatment, therapy, or rest during acute episodes. See our guide on how to help an employee with anxiety for practical manager support strategies.

Acute psychological distress. Even without a formal diagnosis, an employee may experience acute distress from a traumatic workplace event, bereavement, a relationship breakdown, or a period of severe overwhelm that genuinely renders them unfit to work.

Preventative recovery. Some employees benefit from taking leave early, before a manageable stress reaction escalates into a longer-term condition. Employers who support this approach often avoid far more costly extended absences.

Medical Certificates and Evidence: What You Actually Need

You may need to provide evidence, but that evidence does not need to reveal your diagnosis.

Under the Fair Work Act, employers can request evidence for personal leave, including for a single day's absence. The requirements are more flexible than many employees realise:

• A medical certificate only needs to state that you were unfit for work on the relevant dates. It does not need to specify the mental health condition.
• A statutory declaration signed by a Justice of the Peace is also acceptable evidence.
• The certificate can describe the reason as broadly as "medical condition" with no further detail required.
• Evidence can be provided before or after the leave period begins.

Many GPs are comfortable issuing certificates for mental health leave without requiring a prior diagnosis. If your condition is already being managed by a psychologist or counsellor, note that specialist appointments can be difficult to schedule outside of work hours. This is a recognised limitation of the current framework, as personal leave technically does not extend to attending an appointment when an employee is otherwise fit to work.

Your Privacy Rights: What You Must (and Need Not) Disclose

You are not legally required to tell your employer that you are taking leave for mental health reasons, or to disclose a mental health diagnosis.

When notifying your employer of sick leave, it is sufficient to say you are unwell and unable to attend work. Under Australian privacy legislation and anti-discrimination law, your employer cannot demand to know your specific diagnosis. If asked, "I am unwell and unfit for work" is a legally adequate response. If you are unsure how to frame the conversation, our guide on talking to your boss about mental health covers this in more detail.

If you choose to disclose a mental health condition because you need adjustments, want to explain an extended absence, or simply feel comfortable doing so, your employer is legally required to keep that information confidential. They cannot share it with others in the workplace without your consent.

What Happens When Sick Leave Runs Out?

When personal leave runs out, employees can request to use annual leave, arrange unpaid leave by agreement with their employer, or explore income protection insurance through their superannuation. If the condition was caused by work, a workers' compensation claim may also apply. For advice on your specific entitlements, contact the Fair Work Ombudsman or your union.

Workers' Compensation for Work-Related Stress and Psychological Injury

If your mental health condition was caused or significantly worsened by work, you may be entitled to workers' compensation separately from personal leave. This is governed by state and territory schemes including WorkCover (Victoria and Queensland), iCare (NSW), and Comcare (federal employees).

The scale is significant. According to Safe Work Australia's 2025 Key WHS Statistics, psychological injury claims in Australian workplaces reached 17,600 in 2023-24, up 14.7% in a single year, with a median of 37 weeks off work and median compensation of $67,400. Unlike personal leave, a workers' compensation claim requires medical assessment, documentation of the work-related cause, and engagement with the relevant state insurer. If you think your condition is work-caused, speak to your GP and a workers' compensation specialist early.

Employer Duty of Care: Legal Obligations for Mental Health

Australian employers have a positive legal duty to protect employees' psychological health, not just to respond when someone takes sick leave. Under Work Health and Safety (WHS) laws, employers must identify and manage psychosocial hazards such as excessive workloads, bullying, poor management practices, and inadequate support. Since 2022-2023, most jurisdictions have adopted specific psychosocial risk regulations on equal footing with physical safety obligations. Repeated mental health absences in a team are a signal to investigate root causes, not simply approve leave.

Reasonable adjustments

Under the Disability Discrimination Act 1992 (Cth), many mental health conditions qualify as a disability, requiring employers to make reasonable adjustments so affected employees can continue in their role. This might include flexible hours, modified duties, a gradual return-to-work plan, or a change of reporting line. Most adjustments are low-cost.

Adverse action protection

Employers cannot fire or penalise an employee for taking lawful mental health leave. Doing so may constitute adverse action under the Fair Work Act 2009 or discrimination in the workplace under the Disability Discrimination Act. Complaints can be lodged with the Fair Work Commission or the Australian Human Rights Commission.

The Hidden Cost: Presenteeism

A critical insight for employers: the financial cost of employees coming to work while mentally unwell, known as presenteeism, is estimated to exceed the cost of absenteeism.

The PwC/Beyond Blue analysis attributes $6.1 billion per year to mental health-related presenteeism in Australian workplaces, compared to $4.7 billion for absenteeism. Employees who are present but struggling with burnout, anxiety, or depression make more errors, are less productive, and can negatively affect team morale. A workplace culture that discourages mental health leave through guilt, stigma, or manager pressure often ends up costing more than one that actively supports it.

How to Take Mental Health Sick Leave: A Practical Guide for Employees

1. Know your entitlements. Check your employment contract, any applicable EBA, and the NES baseline (10 days for full-time; pro rata for part-time). Check your current accrued leave balance.
2. Notify your employer as soon as practicable. You do not need to disclose your specific condition. A message saying "I'm unwell and unable to attend work today" is sufficient. The Fair Work Act requires you to give notice of the leave and its expected duration.
3. Obtain evidence if required. Check your employer's policy on medical certificates. If one is needed, your GP can issue a certificate stating you are unfit for work without specifying your diagnosis.
4. Protect your privacy. You are not required to explain the nature of your mental health condition to colleagues, managers, or HR beyond what is necessary to administer your leave.
5. Plan your return. For anything beyond a day or two, it can help to discuss a gradual return-to-work plan with your manager and treating practitioner, covering lighter duties, flexible hours, or a phased reintroduction to full responsibilities.
6. Use your workplace's EAP. If your employer offers an Employee Assistance Program, this provides confidential counselling sessions that are separate from leave management and do not affect your leave entitlements.

Guidance for Managers and Employers

• Treat mental health absences identically to physical health absences. Inconsistent treatment creates legal exposure and erodes trust.
• Do not pressure employees to disclose their diagnosis. Requesting evidence of unfitness for work is appropriate. Requesting clinical details is not.
• Store health information confidentially. Medical certificates and health disclosures should be held separately from general personnel files and accessed only by those who need to manage the absence.
• Investigate root causes. Repeated mental health absences in a team may indicate a psychosocial hazard such as an excessive workload, a leadership issue, or a workplace conflict that you have a WHS obligation to address.
• Facilitate a supportive return. Check in with the employee, agree on any temporary adjustments, and avoid overloading them immediately on their first day back.
• Invest proactively. A beyondblue analysis found that every $1 invested in evidence-based mental health workplace programs returns at least $2.30 in benefits, equivalent to $3 in today's terms. Review our employer duty of care guide for a full breakdown of your obligations.

Frequently Asked Questions

Is mental health sick leave the same as sick leave in Australia?

Yes. There is no separate legal category called mental health leave or stress leave. Employees use their personal/carer's leave entitlement under the Fair Work Act 2009, which applies equally to mental and physical health conditions.

How many mental health sick leave days am I entitled to?

Full-time employees are entitled to 10 days of paid personal leave per year under the NES. Part-time employees accrue leave pro rata. Casual employees do not accrue paid personal leave but may have other options, including unpaid leave or workers' compensation.

Do I need a medical certificate for mental health leave?

It depends on your employer's policy. Employers can require evidence for any absence, including a single day. If a certificate is required, it only needs to confirm you were unfit for work. It does not need to specify a mental health diagnosis.

What does a medical certificate need to say for mental health leave?

A medical certificate for mental health leave only needs to state that you were unfit for work on the relevant dates. It can describe the reason as broadly as "medical condition." A statutory declaration signed by a Justice of the Peace is also acceptable.

Do I have to tell my employer why I'm taking mental health sick leave?

No. You are not legally required to disclose your diagnosis or the specific nature of your mental health condition. Saying you are "unwell and unfit for work" is legally sufficient.

Can my employer fire me for taking mental health leave?

No. Taking lawful personal leave is a protected workplace right under the Fair Work Act 2009. Dismissing or penalising an employee for taking mental health leave may constitute adverse action or disability discrimination under the Disability Discrimination Act 1992.

What happens when my sick leave entitlements run out?

You may be able to use annual leave by agreement with your employer. Unpaid leave may also be an option. If your condition was caused or aggravated by work, a workers' compensation claim through your state or territory insurer may provide wage replacement and treatment coverage.

What is the difference between personal leave and workers' compensation for mental health?

Personal/carer's leave covers any period you are unfit for work due to a mental health condition, regardless of cause. Workers' compensation applies specifically when the mental health condition was caused or significantly aggravated by work. Workers' comp is a separate claims process involving your state insurer, medical assessment, and documentation of the work-related cause.

Can I claim workers' compensation for work-related stress or burnout?

Yes, in many cases. If your psychological condition was caused or significantly worsened by your work through excessive workload, bullying, harassment, or traumatic incidents, you may be eligible for a workers' compensation claim through your state scheme (WorkCover, iCare, Comcare, etc.). Consult your GP and seek specialist advice early.

What are reasonable adjustments for mental health at work?

Reasonable adjustments are changes an employer makes to help an employee with a mental health condition continue to perform their role. Examples include flexible working hours, a reduced workload during recovery, a gradual return-to-work plan, modified duties, or changes to the working environment. Employers are legally required to make reasonable adjustments under the Disability Discrimination Act 1992 unless they impose unjustifiable hardship.

If your organisation is looking to build a proactive mental health strategy, from psychosocial risk assessments to structured EAP access and manager capability, Foremind supports Australian businesses in creating workplaces where employees can thrive. Get in touch to find out how we can help.

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