Stress Leave: Employer Obligations and Mental Health Leave Rights in Australia

When someone on your team says they need “stress leave”, it can put you in a tough spot.

On one hand, you want to support your employee and do the right thing. On the other, you’re running a small business, you need certainty around rostering and workloads, and you also need to manage legal risk (without accidentally saying or doing the wrong thing).

The tricky part is that “stress leave” isn’t a separate, official leave type in Australian law. In practice, people use it as a catch-all term for time off work related to mental health - and depending on what’s actually going on, the employee’s time off might fall under paid personal leave, workers’ compensation, unpaid leave, or a combination of options.

Below, we’ll walk you through what stress leave generally means, where it fits under Australian workplace laws, what evidence you can request, and how to manage mental health-related time off in a way that’s supportive, compliant, and practical for your business.

What Is Stress Leave (And Why Do Employees Use This Term)?

In everyday workplace language, stress leave usually means an employee needs time away from work due to mental health symptoms such as anxiety, burnout, depression, or acute stress.

It’s often used when an employee feels they can’t safely or reasonably keep working right now, or when continuing to work could make their mental health worse.

From an employer perspective, what matters is this: even though “stress leave” isn’t a specific category under the Fair Work Act, an employee’s absence may still be protected and regulated by other workplace laws.

Common Situations Where “Stress Leave” Comes Up

• Burnout due to sustained workloads, deadlines, or understaffing
• Workplace conflict (including bullying complaints or interpersonal issues)
• Non-work factors that still impact the employee’s capacity (family issues, financial stress, health conditions)
• A psychological injury claim where the employee believes their mental health condition was caused by work

The right way to manage the situation depends on which of these scenarios you’re dealing with - and whether the employee is medically unfit for work, alleging a workplace cause, or both.

Is Stress Leave Paid Personal Leave, Workers’ Compensation, Or Unpaid Leave?

This is the core issue for most small businesses: what leave is it, actually?

Mental health-related time off in Australia typically falls into one of these categories (and sometimes overlaps):

1) Paid Personal/Carer’s Leave (Sick Leave)

For full-time and part-time employees, the National Employment Standards (NES) provide paid personal/carer’s leave when the employee is unfit for work because of a personal illness or injury. That includes mental health conditions.

So if your employee is unfit for work due to stress, anxiety, depression, burnout, or another mental health condition, and they have a paid personal leave balance available, they may be able to take paid sick leave.

Casual employees generally don’t get paid personal leave, but they may still take unpaid time off and may have other protections (like unpaid carer’s leave in some circumstances).

2) Workers’ Compensation (Psychological Injury)

If the employee says their condition was caused by work, or they lodge a workers’ compensation claim for a psychological injury, a different legal framework may apply.

This is where things can get more complex, because workers’ compensation is governed by state and territory systems (and there are often specific insurer processes, medical assessments, and return-to-work obligations).

It’s also where employers need to be particularly careful about:

• how workplace investigations are handled
• what is said in writing (emails, performance notes, meeting records)
• how you manage capacity, duties, and return-to-work planning

Even if you’re not sure whether a claim will succeed, the way you respond early can matter.

3) Unpaid Leave (By Agreement Or Policy)

If the employee has no paid personal leave left, they might request unpaid leave. There isn’t a general standalone legal entitlement to unpaid “stress leave” under the NES, but unpaid leave may be available:

• by agreement with you
• under an enterprise agreement, award, or employment contract
• as unpaid carer’s leave (in limited situations)
• as a reasonable adjustment (where relevant) under anti-discrimination laws

If you’re in a situation where the employee’s paid leave is exhausted, it’s worth thinking ahead about how you’ll handle extended absences. For example, if you’re trying to navigate what happens when time off continues beyond the usual sick leave balance, you may need a structured approach similar to managing sick leave when entitlements run out.

4) Other Entitlements That Might Be Relevant

Depending on the facts, you may also need to consider:

• Annual leave (if the employee requests it and you approve it)
• Long service leave (varies by state/territory and eligibility)
• Family and domestic violence leave (if the reason relates to family violence)

It’s a good idea to focus less on the label “stress leave” and more on the underlying question: is the employee unfit for work, and what legal pathway applies to their absence?

What Evidence Can You Ask For (And How Should You Handle Privacy)?

When an employee takes time off for stress leave, most employers want to do two things:

• confirm the absence is legitimate, and
• understand what the employee can and can’t do (especially if you’re considering alternative duties or a return-to-work plan).

The key is to request evidence in a way that’s consistent, lawful, and respectful.

Medical Certificates And Evidence Requirements

Under the Fair Work framework, it’s generally lawful to request evidence that would satisfy a reasonable person that the employee is genuinely unfit for work (for example, a medical certificate or a statutory declaration).

That said, you should avoid treating mental health differently from physical health. The best practice is to have a consistent approach across your business.

In some workplaces, employees ask whether they can take time off without a medical certificate. Your approach should align with the NES, any applicable award, and your internal policy. If you’re reviewing what’s reasonable in practice, sick days without a certificate is a common issue that comes up (especially for short absences).

Do You Need To Know The Diagnosis?

In most cases, you don’t need (and shouldn’t push for) the employee’s detailed diagnosis. You usually only need enough information to:

• confirm the employee is unfit for work (or fit for work with restrictions)
• understand the expected timeframe for the absence
• identify any workplace adjustments that may be required

Try to keep the conversation focused on capacity and support, not personal details.

When Can You Request Medical Clearance To Return?

If you have a genuine concern about safety or capacity, you may be able to ask for a medical clearance before the employee returns to work - particularly where the role involves safety-critical duties, high-risk work, or there’s a clear basis for concern.

This should be handled carefully and consistently, and it should be linked to inherent requirements of the role (not assumptions about mental health).

For a deeper look at how employers approach this in practice, medical clearance to return to work is a helpful reference point.

How Should Employers Manage Stress Leave Requests?

There’s no one-size-fits-all response, but there is a best-practice process that keeps things fair and reduces risk.

Step 1: Respond Supportively (Without Overcommitting)

A simple, supportive response is often the best starting point:

• acknowledge the request
• ask what they need right now (time off, reduced duties, flexibility)
• confirm the next steps for leave and evidence (if needed)

Keep your language neutral. Avoid debating whether the employee “should” feel stressed. Also avoid making promises like “your role will be exactly the same when you return” unless you’re confident you can deliver that.

Step 2: Confirm The Leave Type And Record It Properly

Once the employee confirms they’re unfit for work, and you’ve received appropriate evidence (if requested), record the absence correctly:

• paid personal leave (if applicable)
• unpaid leave (if agreed)
• workers’ compensation leave (if a claim is accepted/being managed through your insurer process)

Accurate records matter, especially if the absence becomes extended or if there’s later a dispute about entitlements.

Step 3: Stay In Touch (But Don’t Harass)

It’s generally reasonable to check in periodically, especially if you need to plan staffing and workloads.

However, repeated messages, constant calls, or pressure to return can backfire. Set expectations upfront, such as:

• how often you’ll check in
• who the point of contact is
• what updates you need (for example, an updated certificate if the leave is extended)

Step 4: Consider Reasonable Adjustments

If the employee can return with adjustments (for example, reduced hours, modified duties, or temporary flexibility), it can be worth exploring. This can help the employee recover while helping you stabilise the business.

Adjustments should be practical, documented, and reviewed regularly. They should also be consistent with the inherent requirements of the role.

Step 5: Manage Workplace Factors If Work Is A Contributing Cause

Sometimes stress leave is a signal that something in the workplace needs attention - workload, staffing levels, unclear expectations, or conflict.

This is also where your obligations around mental health at work become important. Employers have duties to provide a safe workplace, including psychological safety. In many small businesses, this is an evolving area, but it’s worth understanding what “good practice” looks like. For example, Fair Work obligations regarding mental health can come into play in how you respond and what policies/processes you have in place.

What If Stress Leave Happens During Conflict, Performance Issues, Or An Investigation?

Small businesses often face the hardest situations when stress leave is requested at the same time as:

• a performance management process
• a misconduct allegation
• a workplace investigation
• a breakdown in working relationships

These scenarios can escalate quickly if they’re not handled carefully.

Can You Continue An Investigation While Someone Is On Stress Leave?

Sometimes you can, but it depends on what’s reasonable and fair in the circumstances.

If the employee is medically unfit, pushing ahead in a way that prevents them from responding could be risky. But in other situations, delaying everything indefinitely may also be impractical - especially if the allegations involve safety or serious misconduct.

Where there’s a need to separate parties, control risk, or keep the workplace safe while you work out what happened, employers sometimes consider options like changes to duties/rosters, working from home arrangements, or (in limited cases) a stand down. It’s important to know that a stand down under the Fair Work Act is available only in narrow circumstances (and awards or enterprise agreements may have different rules), and a “stand down” is not a general right to remove an employee from the workplace without pay while you investigate.

If this is relevant to your situation, standing down an employee pending investigation is an option that needs to be handled carefully (including around pay, process, and whether the legal preconditions are met).

Be Careful About Adverse Action And Discrimination Risk

An employee being unfit for work due to a mental health condition can engage multiple legal protections at once.

For example, it can create risk around:

• general protections/adverse action (for example, if action is taken because an employee exercised a workplace right to take personal leave)
• discrimination (where mental health conditions may be treated as a disability under anti-discrimination laws)
• unfair dismissal (depending on eligibility and the process followed)

This doesn’t mean you’re stuck or you can never manage performance - it just means you need a careful, evidence-based process.

Can You Terminate An Employee Who Is On Stress Leave?

This is a common question, especially for small businesses under pressure.

In short: termination while an employee is on stress leave can be very risky, and you should get tailored advice before taking steps.

There are several overlapping legal issues that can apply, including:

• temporary absence protections (these protections only apply if specific conditions are met - including that the absence is because of illness or injury, the employee gives notice and required evidence where requested, and the absence is not longer than the relevant protected period)
• unfair dismissal risk (if the employee is eligible and the process is not fair)
• general protections risk (if the leave request or absence is a factor in the decision)
• discrimination risk (if the termination relates to a disability or a need for reasonable adjustments)

Termination On Medical Grounds

Sometimes, an extended absence or ongoing incapacity leads employers to consider termination on medical grounds.

This area is particularly sensitive and fact-dependent - including what medical evidence you have, whether the employee can perform the inherent requirements of their role, and whether adjustments are reasonable. It’s also important not to assume that being on leave (or having a mental health condition) automatically means someone can’t do their job long-term.

If this is the situation you’re facing, it’s worth reading about termination on medical grounds so you understand the legal concepts and common pitfalls.

If The Employee Is Resigning Or Serving Notice

Stress leave can also come up during resignation periods, where an employee calls in unfit for work during their notice period. Your obligations can vary depending on evidence, leave balances, and the circumstances.

For example, if you’re unsure how to approach absence during notice, sick leave during a notice period is a common scenario that needs a consistent approach.

Key Takeaways

• “Stress leave” isn’t a standalone legal leave category, but it commonly refers to time off due to mental health symptoms, and it may fall under paid personal leave, workers’ compensation, or agreed unpaid leave.
• Mental health conditions can qualify for paid personal leave if the employee is unfit for work and has leave available (just like physical illness or injury).
• You can request reasonable evidence (like a medical certificate), but you usually don’t need detailed personal information - focus on capacity and timeframe.
• Medical clearance may be appropriate where there’s a genuine, safety-based reason to confirm the employee is fit to return or fit with restrictions.
• Extra care is needed where stress leave overlaps with conflict, performance issues, or investigations, as adverse action, unfair dismissal, and discrimination risks can increase.
• Termination during stress leave is high-risk and fact-dependent, particularly where medical incapacity or workers’ compensation is involved - and temporary absence protections may apply if the employee meets the relevant notice/evidence requirements and the absence falls within the protected timeframe.

If you’d like a consultation on managing stress leave and mental health-related absences in your business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.