Managing Long-Term Sick Leave Under Australian Employment Law

When an employee takes long term sick leave, it can put real pressure on a small business.

You might be trying to cover shifts, keep projects moving, and support your team member - all while staying compliant with workplace laws. And because extended absences often involve sensitive medical information and mental health considerations, it can feel like you’re walking a tightrope between compassion and risk management.

The good news is: with a clear process, you can manage long term sick leave in a way that’s fair, practical, and legally safer for your business.

Below, we’ll walk through practical steps Australian employers can take when an employee is away for weeks or months, including what you can ask for, how to handle leave balances, what to document, and when it may be time to consider medical clearance and capacity discussions.

What Counts As Long Term Sick Leave In Australia?

There’s no single universal definition of “long term sick leave” across every workplace, but in practice employers usually use the phrase to describe an extended period of personal/carer’s leave (or time off due to illness or injury) - often several weeks or more - where the employee is unfit for work.

Some common examples include:

• a serious physical injury requiring surgery and rehabilitation
• chronic illness that flares up unpredictably
• mental health conditions requiring treatment and time off
• extended recovery from an accident
• ongoing medical investigations where the employee can’t safely perform their role

As an employer, the key isn’t the label - it’s how you respond when the absence becomes extended, uncertain, or operationally difficult.

That’s where having a consistent approach helps, especially if you employ multiple people and want to avoid ad-hoc decisions that could later be challenged.

Step 1: Confirm The Leave Basis And Get The Right Evidence Early

When a long absence begins, one of the most practical things you can do is clarify what type of leave is being taken and what evidence is required.

Personal/Carer’s Leave Vs Other Absences

Depending on the circumstances, your employee might be accessing:

• paid personal leave (sick leave) if they’re full-time or part-time and have a balance available
• unpaid leave after their paid entitlements are used up (this might be leave without pay, or another arrangement depending on what applies)
• annual leave (sometimes the employee may request this, but it’s not automatically interchangeable with sick leave)
• workers’ compensation (if the condition is work-related and the employee is eligible under the relevant scheme)

If you’re unsure about how a request should be classified, it’s usually better to pause and clarify early than to fix it later.

What Evidence Can You Ask For?

Generally, you can ask an employee to provide evidence that would satisfy a reasonable person that they’re genuinely unfit for work (for example, a medical certificate or statutory declaration). What’s “reasonable” can also depend on your workplace policies and any applicable award or enterprise agreement.

For longer absences, you’ll usually need ongoing certificates or updated information to understand:

• the period they’re unfit for work
• whether they can work with restrictions (e.g. reduced hours, modified duties)
• when the next review date is

Many employers find it helpful to standardise their evidence expectations in writing (for example, in an employment contract and a leave policy), so the process feels consistent rather than personal. If you haven’t formalised this yet, an Employment Contract and supporting workplace policies can help set clear expectations from the start.

Be Careful With Medical Details

Even when you can request evidence, you generally should not be pushing for unnecessary personal medical details. The focus should stay on capacity for work and expected timeframes, not diagnoses or private information that isn’t needed for you to manage the workplace.

Step 2: Keep Communication Supportive, Regular, And Documented

When you’re managing long sick leave, it’s easy for communication to become awkward - especially if you don’t want to pressure the employee, but you also need clarity for staffing and operations.

A good approach is to keep communication:

• supportive (checking in respectfully and acknowledging the situation)
• structured (agreeing on check-in frequency and what you need updates on)
• documented (so you can show what was said and agreed, if issues arise later)

What Should You Document?

In a small business, record-keeping doesn’t have to be complicated. But you should keep a file (or secure HR folder) containing:

• medical certificates/statutory declarations provided
• dates of absence and leave type applied
• emails/messages confirming check-ins and updates
• any agreed return-to-work plans or adjustments

Clear documentation helps you stay consistent, and it can be crucial if you later need to show you acted reasonably and lawfully.

Privacy Still Matters

Limit who has access to medical certificates or sensitive information. Only share what is necessary (for example, telling a supervisor that the employee is away and the expected return date, without sharing health details).

Step 3: Track Entitlements, Leave Balances, And What Happens When They Run Out

One of the most practical pressure points with long term sick leave is when paid personal leave is exhausted.

At that point, you’ll need to consider what happens next - and the right answer can depend on the employee’s circumstances, your workplace arrangements (including any applicable award or enterprise agreement), and what is reasonable.

Common Options When Paid Sick Leave Runs Out

Depending on the scenario, you may consider:

• leave without pay (for example, where the employee requests it, your contract/policies allow it, or you otherwise agree an arrangement)
• annual leave (if the employee requests it, or if you agree to a request)
• long service leave (depending on eligibility and jurisdiction)
• workers’ compensation (if the absence is work-related and covered by the relevant state or territory scheme)
• a return to work plan with adjusted duties/hours (if medically appropriate)

It’s important to avoid assumptions like “their sick leave is finished, so we can terminate”. Even when leave balances are low, you still need to manage the situation carefully and lawfully - especially where disability discrimination risk, adverse action risk, or unfair dismissal risk may arise.

If you’re navigating what happens after entitlements are used up, it can help to understand the broader picture of managing sick leave when entitlements run out.

Plan For Payroll And Final Pay Impacts

Extended absences can affect things like accruals, rosters, and potential final pay calculations if the employment relationship ends later. If you’re dealing with end-of-employment scenarios, it’s worth having a reliable process for final pay so you don’t miss any entitlements.

Step 4: Consider Medical Clearance, Capacity, And Reasonable Adjustments

At a certain point, the most important question becomes:

Can the employee safely perform the inherent requirements of their role (now or in the near future)?

This is where employers often need to shift from “managing leave” to “managing capacity and return to work”.

When Can You Ask For Medical Clearance?

It’s common (and often reasonable) to request medical clearance before an employee returns to work after a long absence - particularly where safety is involved or the role is physically or psychologically demanding. What you can ask for, and how you ask, should be connected to the role and your WHS obligations, and should take into account any applicable award, enterprise agreement, or policy.

For example, if an employee has been away due to surgery, a workplace injury, or a significant mental health condition, you may need confirmation that they can return and whether there are any restrictions.

When handled properly, requesting clearance can protect:

• the employee’s health and safety
• your workplace safety obligations
• your business continuity (by understanding realistic timeframes)

However, you should be careful about the scope of what you ask for and make sure it’s connected to the job and safety. This is a common compliance area, and employers often ask us about medical clearance to return to work.

Reasonable Adjustments And Flexible Return-To-Work Options

Depending on the circumstances, you may need to consider whether reasonable adjustments are possible to support a return to work (especially where an illness or injury could be considered a disability).

Practical examples may include:

• a graduated return (e.g. 2 days per week initially)
• modified duties or reduced physical tasks
• temporary work from home (where the role allows)
• adjusted start/finish times for medical appointments

Even if your business is small, documenting what you considered (and why something was or wasn’t possible) can be very important.

If The Employee Can’t Return Yet: Avoid “Radio Silence”

If medical evidence says the employee is not fit for work and there’s no clear return date, you should still keep the communication loop open.

Consider agreeing on a review date (for example, in 4 weeks) where the employee provides updated medical evidence. This helps you avoid long gaps where expectations become unclear on both sides.

Step 5: Manage Risk Areas (Dismissal, Discrimination, And Process)

Long absences can raise tough questions like:

• “How long do we keep a role open?”
• “Can we replace the employee permanently?”
• “At what point can we end the employment?”

These issues are highly fact-specific, but the practical risk areas are usually consistent.

Unfair Dismissal And Adverse Action Risks

If you terminate employment while an employee is on long term sick leave, you can increase the risk of claims such as:

• unfair dismissal (depending on eligibility and the circumstances)
• general protections/adverse action claims (for example, if action is taken because the employee exercised a workplace right, such as taking personal leave)
• discrimination complaints (especially if the illness/injury is related to disability)

This doesn’t mean termination is never possible. But it does mean you should treat it as a process-driven decision, supported by evidence and fairness.

Focus On Inherent Requirements (Not The Diagnosis)

A safer framework is to assess:

• what the inherent requirements of the role are
• what duties the employee can and cannot perform
• whether adjustments are reasonable for your business
• what medical evidence says about future capacity

This keeps your decision grounded in operational reality rather than assumptions about the condition.

Avoid Informal “Handshakes” And Unclear Arrangements

When absences drag on, businesses sometimes make informal promises like “take as long as you need” or “your job will be here whenever you’re ready”. Even if said with good intentions, vague commitments can create disputes later.

Where possible, keep arrangements clear and confirmed in writing, including:

• how leave is being recorded
• when the next medical update is due
• any temporary coverage arrangements
• what a return-to-work process will look like

If Employment Ends, Get The Documentation Right

If the employment relationship does end (whether resignation, termination, or another arrangement), ensure your documentation is consistent and complete. For example, you may be asked to provide an employment separation certificate in certain scenarios.

And if notice is being paid out rather than worked (which can come up when a role needs to be filled quickly), it’s important you understand payment in lieu of notice obligations and how it interacts with payroll and entitlements.

Key Takeaways

• Long term sick leave is usually less about a fixed legal definition and more about how you manage extended absences that impact operations and capacity planning.
• Start by confirming the leave basis and requesting appropriate evidence early, focusing on fitness for work and timeframes rather than unnecessary medical details.
• Maintain supportive, regular communication and document key interactions so expectations stay clear and your decisions are evidence-based.
• Track leave balances carefully and plan what happens when paid personal leave runs out, including whether leave without pay or a return-to-work plan is appropriate.
• Where the employee may return, medical clearance and reasonable adjustments can help you manage safety and compliance while supporting the employee back into work.
• If the situation moves toward ending employment, the process and documentation matter - getting advice early can reduce the risk of unfair dismissal, adverse action, or discrimination issues.

Note: This article is general information only and doesn’t take into account your specific circumstances. Your obligations may vary based on the National Employment Standards, any applicable modern award or enterprise agreement, and state or territory laws (including long service leave and workers’ compensation schemes).

If you’d like help managing long term sick leave in your business - including evidence requests, return-to-work planning, and risk management - contact Sprintlaw on 1800 730 617 or email team@sprintlaw.com.au for a free, no-obligations chat.