Sick Leave for Mental Health in Australia: Employer Obligations

More teams are openly discussing mental health at work, which is a positive step for culture and safety. But as an employer, you still need a clear and lawful process when an employee asks to take sick leave for mental health reasons.

Can employees use sick leave for mental health? What evidence can you ask for? How should you manage extended absences or a safe return to work? This guide explains your obligations under Australian law and offers a practical framework you can apply in your business right now.

We’ll walk through what counts as sick leave for mental health, when evidence is reasonable, how to record and pay leave correctly, and how to support employees while managing risk.

What Counts As Sick Leave For Mental Health Under Australian Law?

Under the National Employment Standards (NES), full-time and part-time employees can take paid personal/carer’s leave (often called sick leave) when they are unfit for work due to illness or injury. This includes mental health conditions such as anxiety, depression, acute stress reactions, or other psychological injuries.

Key points to keep in mind:

• Personal/carer’s leave is an entitlement for full-time and part-time staff (10 days per year for full-time employees, accrued progressively; part-time staff accrue pro rata). Casuals don’t accrue paid personal leave but may access unpaid carer’s leave in some situations.
• You should treat mental health illness or injury the same way you treat physical illness or injury for leave purposes. Avoid inconsistent rules or practices.
• Employees are protected from adverse action for taking lawful leave. Decisions about performance, rosters, promotion or termination must not be based on someone exercising their workplace rights.
• Anti-discrimination laws and work health and safety (WHS) laws also apply. You have a duty to eliminate or minimise psychosocial risks (e.g. workload, bullying, harassment) so far as reasonably practicable.

A lot of confusion arises because “stress leave” is not a separate legal category under the NES. If an employee is unfit for work due to stress or a related condition, that falls under personal/carer’s leave like any other illness. If you’re navigating complex situations, this overview of stress leave is a helpful companion to this guide.

Do Employees Need Medical Evidence-and What Can You Ask For?

You can ask for reasonable evidence that would satisfy a reasonable person that the employee is (or was) unfit for work. Typically this is a medical certificate or a statutory declaration for short absences where a certificate isn’t available. You don’t need full clinical details to process sick leave-and you shouldn’t pressure an employee to disclose a diagnosis.

When Is It Reasonable To Request Evidence?

• Where the relevant award, enterprise agreement or your policy says so (for example, after two consecutive days off, or for absences on certain days).
• For frequent or patterned absences, or where there are performance or safety concerns.
• Any time you reasonably need to verify the employee was unfit for work.

If you’re unsure about thresholds, ensure your leave policy is clear and consistently applied. For practical boundaries around evidence, see what’s acceptable when asking for medical certificates.

How Much Detail Can You Ask For?

• Ask only for information you need to manage the absence or make WHS adjustments-for example, “unfit for work” dates, capacity for modified duties, or recommended adjustments.
• Avoid asking for diagnoses or sensitive clinical notes unless necessary to fulfill WHS obligations or to assess reasonable adjustments-and even then, take care to request the minimum necessary information.
• Handle medical information confidentially, store it securely and restrict access to those who need it to perform their role.

Medical Clearance To Return To Work

In some cases-especially after extended absences or where there are safety-critical tasks-it’s reasonable to request a fit note or medical clearance to confirm the employee can safely return (with or without restrictions). Focus your request on functional capacity and any temporary adjustments required, rather than diagnoses.

Paying, Recording And Managing Mental Health Sick Leave

Solid processes reduce admin headaches and help you comply with the Fair Work Act and WHS laws. Here’s a simple framework.

1) Set Clear, Fair Policies

Codify how employees apply for sick leave, when evidence is needed, who approves leave, and how medical information is handled. A short, plain-English Workplace Policy makes expectations clear and helps you apply rules consistently.

Bundle your approach to leave, conduct, WHS and anti-discrimination into a single, accessible Staff Handbook so your team can find answers fast.

2) Check The Employment Contract And Any Award

Make sure your Employment Contract aligns with the NES and any applicable modern award or enterprise agreement. Avoid contract terms that inadvertently undercut leave entitlements or create inflexible processes that won’t work for mental health situations.

3) Record-Keeping And Pay

• Track accrual and usage of personal/carer’s leave accurately. Pause accrual only when the law allows (for example, unpaid leave generally doesn’t accrue paid personal leave).
• Pay at the employee’s base rate for hours they would have worked. Don’t offset sick leave with annual leave unless the employee requests it and the law permits.
• Ensure payslips reflect leave balances properly to maintain transparency and compliance.

4) Communication During Absence

Keep communication supportive, succinct and necessary. Confirm receipt of the leave request, note any evidence needed, and ask whether any temporary workplace adjustments are recommended by the treating practitioner.

Avoid excessive check-ins. Instead, agree a sensible rhythm for updates (e.g. weekly or at key treatment milestones) so the employee can focus on recovery.

5) Plan For Coverage And Continuity

Have a contingency plan for workload, client communications and safety-critical tasks. Cross-train staff where practical and document key processes, so you’re not dependent on one person being available at all times.

Supporting Recovery And Return To Work (Without Legal Risk)

Supporting an employee’s recovery is the right thing to do-and it’s also part of your WHS duty to provide a safe workplace. It doesn’t mean you must accept unsafe arrangements or open-ended absences without structure. A balanced plan will do both.

Reasonable Adjustments

Consider reasonable adjustments that help an employee perform the inherent requirements of their role. Examples include temporary changes to hours, duties, supervision, workload, or a phased return.

What’s “reasonable” depends on the role, risks, medical advice and the size/resources of your business. Document agreed adjustments and timeframes, and schedule a review.

Psychosocial Risk Management

Psychosocial hazards-like high job demands, poor support, bullying or harassment-can contribute to mental health injury. Review these risks proactively and control them so far as reasonably practicable. This often involves clarifying roles and priorities, ensuring adequate resourcing, training leaders, and addressing conduct issues early.

Fit For Work And Return-To-Work Plans

Use short return-to-work plans that outline any limitations, adjusted duties and check-in points. Where appropriate, seek treating practitioner input focused on functional capacity, not diagnosis. If there are safety concerns, you can seek independent medical advice as a last resort.

For more on timing and scope of fitness notes, see how to approach a medical clearance in practice.

Respect Privacy And Dignity

Only collect and share the minimum information necessary, and restrict access to managers who genuinely need to know. Train leaders to speak about mental health with empathy and to avoid assumptions or informal “diagnoses.”

Your Broader Fair Work Obligations

Beyond leave entitlements, consider your broader duties-like consultation obligations under awards for major workplace changes, WHS duties around psychosocial risk, and protections from discrimination and adverse action. This summary of Fair Work obligations regarding employee mental health is a useful reference as you set up processes and train managers.

Handling Edge Cases: No Balance, Prolonged Absence, Or Misconduct

Not every scenario is straightforward. Here’s how to approach common problem areas while staying on the right side of the law.

What If The Employee Runs Out Of Paid Leave?

Consider options like unpaid personal leave, annual leave (if requested by the employee), or leave without pay. Your policy should explain when each can apply and how requests will be considered. This guide on managing sick leave when entitlements run out steps through practical approaches and documentation tips.

Be careful with pay decisions-deductions require legal authority. If you’re considering a deduction or offset, double-check your obligations around withholding pay first.

How Long Is “Too Long” For Absence?

Each case turns on medical evidence, the inherent requirements of the role, and whether reasonable adjustments would allow safe performance. If, after a fair process and up-to-date medical evidence, the employee can’t perform the inherent requirements even with reasonable adjustments, termination may be an option as a last resort.

This is complex and high-risk-especially where mental health and potential disability discrimination are in play-so follow a structured capability process and seek advice. Read our overview of termination on medical grounds to understand the key steps and legal tests.

Patterns Of Absence, Performance Issues Or Misconduct

Don’t assume that mental health explains or excuses any and all conduct. Apply your policies, distinguish between capacity and conduct issues, and investigate facts fairly. If there’s alleged misconduct, follow a procedurally fair process (notice of allegations, chance to respond, consider medical context and supports, and document outcomes).

Where performance concerns relate to capacity, prioritise medical input, reasonable adjustments and support before considering disciplinary steps. Keep a clear record of the support you offered and why decisions were made.

Communication Pitfalls To Avoid

• Don’t ask for invasive medical detail. Focus on capacity and adjustments.
• Don’t pressure an employee to resign. Explore adjustments and time-limited plans first.
• Don’t allow untrained managers to manage sensitive cases alone. Provide scripts, templates and guidance.
• Don’t make knee-jerk decisions about rosters, promotions or termination while someone is on sick leave without a clear evidentiary basis and a fair process.

Tighten Your Framework Going Forward

Prevention is better than cure. Make sure your employment documentation and internal processes are doing their job:

• Employment Contract: Include clear clauses on leave notification, evidence, confidentiality, and capacity processes that align with the NES and any applicable award.
• Workplace Policy and Staff Handbook: Set expectations around mental health support, evidence, adjustments, privacy and return-to-work planning.
• Manager training: Equip leaders to hold supportive conversations, spot psychosocial risks early, and escalate appropriately.

Practical Step-By-Step: Your Action Plan

Step 1: Update Your Policies And Contracts

Ensure your policies and Employment Contract reflect the NES, awards and your practical approach to evidence, adjustments and privacy.

Step 2: Set A Clear Intake Process

Decide how employees notify sick leave, who approves it, when evidence is required, and how records are kept. Use a simple template for requests and approvals.

Step 3: Build A Supportive, Compliant Workflow

When a request comes in: acknowledge it, confirm any evidence needed, assess risks, consider adjustments and plan communication touchpoints. Keep records succinct and factual.

Step 4: Plan For Return To Work

Request functional guidance (and a medical clearance if justified), agree a phased plan if needed, and schedule check-ins. Review and adjust based on how the employee is tracking.

Step 5: Escalate Carefully In Complex Cases

If absences extend or capacity remains unclear, consider independent medical advice and a formal capability process. Refer to guidance on termination on medical grounds before taking any adverse action.

Key Takeaways

• Employees can take personal/carer’s (sick) leave for mental health in Australia, and you should treat mental and physical illness consistently under the NES.
• It’s reasonable to request evidence, but keep it proportionate-focus on dates and capacity, not diagnoses, and protect medical privacy.
• Strong foundations-clear policies, accurate records, and aligned contracts-make it easier to approve, pay and track mental health sick leave correctly.
• Support safe return-to-work with reasonable adjustments, psychosocial risk management and time-limited review plans.
• If leave runs out or absences are prolonged, consider unpaid options and a structured capability process; decisions about termination require careful evidence and fair procedure.
• Train managers, document decisions, and use targeted legal support for tricky scenarios to minimise risk and maintain trust.

If you’d like a consultation on setting up compliant processes for sick leave and mental health in your workplace, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.