Mental Health Sick Leave: Employer Guide To Personal Leave Entitlements In Australia

Mental health is now a core workplace issue for Australian small businesses - not just from a “culture” perspective, but from an employment law and safety perspective too.

If an employee asks for time off due to anxiety, depression, burnout, or another mental health condition, it can be hard to know what you can ask, what you should do, and how to balance compassion with operational needs.

The good news is that, in many cases, the framework is similar to physical illness: mental health-related sick leave in Australia will usually be handled under personal/carer’s leave entitlements (often called “sick leave”), alongside your broader obligations around work health and safety, privacy/confidentiality, discrimination and fair process.

Below, we’ll walk you through how mental health sick leave works for employers, what evidence you can request, and practical ways to handle requests while protecting your business and your people. This article is general information only and isn’t legal advice.

Is Mental Health Sick Leave In Australia Covered By Personal Leave?

In most workplaces, yes. If an employee is unfit for work due to a mental health issue, that time away from work will generally be treated as paid personal/carer’s leave (often referred to as “sick leave”), if the employee is entitled to it and has a balance available.

This is why you’ll often see people ask: are mental health days sick days? In an employment law sense, they usually are - provided the employee is genuinely unfit for work because of illness or injury (which can include mental health conditions).

What Personal Leave Covers (In Plain English)

Personal leave is designed to cover situations where an employee can’t work because they’re:

• unwell (including mental illness);
• injured;
• needing to care for an immediate family or household member who is unwell or injured; or
• dealing with an unexpected emergency affecting those people.

If your employee says they need a “mental health day” or time off for their mental health, it’s usually best to treat that request similarly to any other sick leave request - while also being mindful of additional privacy and sensitivity issues (we’ll cover those below).

Does It Apply To All Employees?

The entitlement depends on employment type and the relevant industrial instrument (like a Modern Award or enterprise agreement). As a general guide:

• Full-time employees accrue paid personal leave (often 10 days per year under the National Employment Standards).
• Part-time employees accrue paid personal leave on a pro-rata basis.
• Casual employees typically do not receive paid personal leave, but may be entitled to unpaid leave in some circumstances, and still have important protections (for example, discrimination protections).

Also, an employee may have access to other leave types depending on the circumstances (for example, annual leave, unpaid leave, or family and domestic violence leave). But if the reason is illness-related and they have paid personal leave accrued, that’s usually the starting point.

What Evidence Can You Ask For When An Employee Takes A Mental Health Day?

Many small business owners want to “do the right thing” but also need to manage misuse of leave, staffing gaps and fairness across the team.

In Australia, employers can generally request evidence that would satisfy a reasonable person that the employee was genuinely unfit for work (or needed to provide care). What evidence you can ask for, and when, can also be affected by the employee’s award, enterprise agreement, employment contract and your workplace policies.

Medical Certificates And Statutory Declarations

Evidence can include:

• a medical certificate from a doctor;
• a certificate from another registered health practitioner (depending on your Award/Agreement and the circumstances); or
• a statutory declaration (in some cases).

For many businesses, the practical question is: “Do they need a certificate every time?”

The answer often comes down to your workplace rules, any applicable Award/Agreement terms, and what’s considered reasonable in the circumstances. It’s common to set a policy position (for example, requiring evidence for 2+ consecutive days, or where the absence falls immediately before/after a weekend or public holiday), but you should check any Modern Award obligations and apply your approach consistently.

If you’re weighing up how strict to be, it helps to understand the common scenarios where employees may not produce evidence straight away - including the situation where someone needs time off for stress or burnout but can’t access a GP appointment on the day. Our article on sick days without a certificate can help you sense-check what’s reasonable.

Do You Need The Employee To Disclose Their Diagnosis?

Usually, no.

You generally don’t need (and should be cautious about requesting) detailed medical information like a diagnosis, medication, therapy records, or “what exactly happened”. In most cases, you only need enough information to:

• process the leave request correctly (paid vs unpaid, type of leave);
• understand whether they are fit to work or need adjustments on return; and
• meet your work health and safety (WHS) obligations.

A medical certificate will often simply say the employee is “unfit for work” from X to Y. That may be enough.

Be Careful With “Proof” Requests That Cross Into Privacy

Asking for evidence is fine. Asking for excessive personal details often isn’t.

Mental health information is sensitive. Privacy obligations can apply depending on your circumstances (including whether your business is covered by the Privacy Act, and any relevant state or territory privacy laws). Regardless, confidentiality and appropriate handling of employee health information is still a key legal and HR risk area (and a major trust issue inside your team).

As a practical rule: collect the minimum information you need, store it securely, and limit access to people who genuinely need to know.

How To Manage Mental Health Sick Leave Requests Fairly (Without Disrupting Your Business)

When you’re running a small business, one unexpected absence can throw off rosters, deadlines and customer service. You can still manage this professionally - and legally - without treating the employee like they’ve done something wrong.

1. Have A Clear Process For Leave Requests

Your process should cover:

• who the employee contacts (manager/owner/payroll);
• when they should notify you (e.g. as soon as practicable);
• what information they should provide (e.g. unfit for work today);
• when evidence is required; and
• how the leave is recorded in payroll.

The easiest way to keep this consistent is to document it in a policy or handbook, alongside your other standards of conduct and workplace rules. Many employers bundle this into a broader Workplace Policy framework so expectations are clear from day one.

2. Respond Supportively (But Keep Your Questions Work-Focused)

If an employee says they need time off for mental health reasons, you can acknowledge the request without asking intrusive questions.

For example, you might say:

• “Thanks for letting me know. Please take the day and keep me updated if you’ll be away tomorrow as well.”
• “If you’re away for more than X day(s), please provide a medical certificate or other acceptable evidence.”
• “When you’re ready to return, let’s check in about any support you might need.”

This approach helps you meet your legal obligations while keeping your business running.

3. Apply Your Evidence Rules Consistently

Inconsistency is one of the biggest risks for employers here.

If you only demand evidence when it’s a mental health day (but not when it’s a cold or migraine), you can unintentionally create:

• a discrimination risk;
• a bullying/psychosocial safety risk; and
• a workplace culture problem that leads to higher turnover.

Consistency doesn’t mean being “hardline”. It means being predictable, fair, and documenting your approach.

4. Keep Good Records

Good records help you if there’s ever a dispute about leave balances, performance management, or allegations that the business treated someone unfairly.

Keep notes of:

• the date and nature of the request (e.g. personal leave);
• what evidence was provided (and when);
• any return-to-work discussions or adjustments; and
• any operational changes you made (e.g. shift coverage).

Remember: record-keeping should be factual and respectful. Avoid commentary about whether you “believe” the employee.

Return To Work And Ongoing Support: What Can You Ask For?

Many employers get stuck at the point where the employee is ready to come back - especially if the employee has been away for more than a few days, or the role is high pressure, safety critical, or involves managing others.

When Can You Request Medical Clearance?

You can generally request a “fitness for work” clearance where it’s reasonable to ensure the employee can safely perform their role.

For example, it may be reasonable to seek clearance if:

• the employee has been away for an extended period;
• there are genuine safety concerns (for them or others);
• the job involves high-risk duties (driving, operating machinery, working alone, etc.); or
• the employee has indicated they may need adjustments.

What’s “reasonable” depends on context, and you should avoid using medical clearance requests as a barrier to returning. If you want a deeper guide to this, medical clearance requirements are a helpful starting point.

Reasonable Adjustments (And Why They Matter For Small Businesses)

If a mental health condition amounts to a disability under anti-discrimination laws, you may need to consider reasonable adjustments so the employee can perform the inherent requirements of their role.

Adjustments might include:

• temporary reduced hours or a phased return to work;
• changes to start/finish times;
• changes to duties (temporarily);
• additional supervision, check-ins or clearer task allocation; or
• adjustments to workload or deadlines.

“Reasonable” will depend on factors like cost, impact on your business, the size of your team, and the operational requirements of the role. The key is to show you considered options in good faith, rather than automatically saying no.

WHS And Your Duty Of Care Includes Psychological Safety

Employers have a duty to provide a safe workplace, which includes managing risks to mental health (often called psychosocial risks).

This can overlap with leave management in a practical way. For example, if workload, harassment, bullying, unclear expectations, or chronic understaffing are contributing factors, you may need to address those risks - not just approve leave and hope for the best.

If you’re reviewing this part of your compliance, it’s worth revisiting your broader duty of care obligations.

What If Mental Health Absences Become Long-Term Or Frequent?

This is where small business owners often feel stuck.

On one hand, you want to support your employee and do the right thing. On the other, you may be running a lean team, and ongoing absences can be extremely difficult to manage.

There isn’t a one-size-fits-all answer, but there is a pathway you can follow to stay fair and reduce legal risk.

Step 1: Check Leave Balances And Entitlements

Start by confirming what paid personal leave has accrued and been used.

If paid leave is exhausted, the employee may request unpaid leave or alternative arrangements. In some cases, they may request annual leave instead - though you should still be careful about how you frame discussions, so it doesn’t feel like you’re pressuring them not to take sick leave.

Step 2: Get Enough Information To Manage The Workplace (Not Their Health)

If absences are becoming frequent or extended, you may need more information about:

• expected timeframes (e.g. likely return date);
• whether they can perform inherent requirements; and
• whether adjustments could help them return sooner and safely.

This is often done via a treating practitioner certificate, or in some workplaces an independent medical assessment (with caution and advice).

Step 3: Consider Performance Separately From Health

If performance issues exist, be careful not to treat a health issue as a “performance problem”.

A safer approach is to:

• separate “capacity to work” questions from “quality of work” questions;
• document expectations clearly; and
• pause or adapt performance management where health issues are genuinely impacting capacity.

This is also where having tailored employment documentation helps. A well-drafted Employment Contract can clarify policies, notice requirements, and key obligations, while still aligning with Fair Work minimum standards.

Step 4: Be Cautious With Termination Decisions

Sometimes, despite adjustments and support, an employee may not be able to return to work for an extended period or may not be able to perform the inherent requirements of their role.

Termination in these situations is high-risk and should be handled carefully, because it can involve:

• unfair dismissal risk (depending on eligibility);
• general protections risk (adverse action);
• disability discrimination risk; and
• specific Fair Work protections for temporary absence due to illness or injury.

If you’re heading towards this territory, it’s important to get advice early and follow a defensible process. The legal issues are discussed in more detail in our guide to termination on medical grounds.

Key Takeaways

• Mental health-related sick leave in Australia is generally covered under personal/carer’s leave (sick leave) when an employee is genuinely unfit for work due to illness or injury.
• You can usually request reasonable evidence (like a medical certificate), but you generally shouldn’t require an employee to disclose a detailed diagnosis to access sick leave.
• Having a clear, consistent leave process (including evidence rules) helps reduce disputes and avoids claims that mental health is being treated differently to physical illness.
• On return to work, it may be reasonable to request medical clearance in some situations, and you should consider whether reasonable adjustments are needed.
• Long-term or frequent absences should be managed through careful documentation, capacity-focused discussions, and early legal advice - especially before any termination decision.

If you’d like help setting up a compliant approach to mental health sick leave, updating your employment documents, or managing a complex leave situation, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.