Whether you’re running a small business or you’ve just hired your first employee, sick leave is one of those topics that sounds simple until you’re the one dealing with an absence, payroll, and a worried team.
The good news is that New Zealand’s sick leave rules are fairly clear once you know the basics. This guide is updated so you can feel confident you’re working from current NZ requirements, and it’ll help you understand what employees are entitled to, what employers can ask for, and how to handle common “grey area” situations (like mental health days and casual staff).
Note: This article is general information only. If you’re unsure how the rules apply to your workplace, it’s worth getting tailored advice before issues escalate.
How Many Sick Days Are Employees Entitled To In New Zealand?
In New Zealand, most employees are entitled to 10 days’ paid sick leave per year, once they meet the eligibility requirements (we’ll cover those next).
This entitlement comes from the Holidays Act 2003, which sets minimum employee leave entitlements. Employers can always offer more generous sick leave in an employment agreement or policy, but they generally can’t offer less than the legal minimum.
What Sick Leave Can Be Used For
Sick leave isn’t just for when the employee personally has a cold or flu. Employees can generally use sick leave when they:
- are sick or injured
- need to seek medical treatment
- need to care for a dependent who is sick or injured (for example, a child or someone who relies on them for care)
In practice, the key question is usually whether the employee is genuinely unfit for work (or needs to care for someone who is), rather than the specific diagnosis.
Can Sick Leave Be Used For A Mental Health Day?
Yes, mental health can absolutely be a valid reason to take sick leave if the employee is unwell or not fit to work.
Mental health is health. If someone is experiencing anxiety, depression, burnout, or another mental health issue that affects their ability to work safely and effectively, they may be entitled to use sick leave in the same way as for a physical illness.
If this comes up in your workplace, it helps to handle it with a mix of legal compliance and basic human decency. A supportive approach can reduce long-term absence and keep your culture healthy. If you want to explore how this typically works in practice, mental health day off work is a useful starting point.
When Do Employees Become Eligible For Sick Leave?
An employee doesn’t automatically get 10 sick days on day one of employment. In NZ, sick leave usually becomes available after the employee has met the eligibility threshold.
Generally, an employee becomes entitled to sick leave after they have:
- completed 6 months of current continuous employment with the same employer, or
- worked for the employer for 6 months and averaged at least 10 hours per week (and met other regular-work requirements)
Once eligible, the employee gets the sick leave entitlement (10 days) and then becomes entitled to another 10 days after each subsequent 12-month period (as long as they still meet the ongoing requirements).
Can Employers Offer Sick Leave Earlier Than 6 Months?
Yes. Many employers choose to offer sick leave from the start date (or after a shorter probation period) as a benefit, especially where they’re competing for talent.
If you do this, make sure the terms are clearly documented. The simplest way to do that is to set it out in the Employment Contract and then align your internal processes with a written policy so expectations are consistent across the business.
What About Fixed-Term Employees?
Fixed-term employees can still become entitled to sick leave if the employment lasts long enough and the eligibility requirements are met.
This is one reason it’s important to get your employment documentation right from the start. A fixed-term arrangement needs specific legal grounds and wording, and leave entitlements still apply during the term.
How Sick Leave Accrues, Carries Over, And Caps
One of the most common points of confusion is whether sick leave “accrues” like annual leave, whether it’s paid out, and how much can build up.
Does Sick Leave Accrue Weekly Like Annual Leave?
Not usually in the same way annual leave does.
In most cases, sick leave becomes available in “chunks” when the employee reaches eligibility (after 6 months), and then renews after each subsequent 12-month period. However, payroll systems may show it accruing progressively to help with tracking, particularly where an employer provides sick leave in advance.
The key point is: whatever your payroll system shows, the legal entitlement needs to line up with what the Holidays Act requires (and what the employment agreement promises).
Can Unused Sick Leave Carry Over?
Yes. If an employee doesn’t use all their sick leave, some of it can carry over into the next year.
However, there is a cap: an employer only has to allow sick leave to accumulate up to a maximum of 20 days (unless the employment agreement offers more).
That means:
- If the employee has unused sick leave at the end of the year, it can roll over.
- But the total available balance doesn’t have to exceed 20 days (minimum legal position).
Is Sick Leave Paid Out When Someone Leaves?
Generally, no. Unlike annual leave (which is typically paid out on termination if not taken), unused sick leave is usually not paid out when employment ends.
This can surprise employees, so it helps to set expectations clearly and ensure your onboarding documents and policies are consistent.
What Evidence Can Employers Ask For (Medical Certificates And Proof)?
Sick leave can be a sensitive area. As an employer, you want to trust your team, but you also need to manage genuine operational risk and discourage abuse of leave.
New Zealand law allows employers to ask for evidence in certain circumstances.
When Can You Ask For Proof?
Common situations include:
- After three or more consecutive calendar days of sick leave, you can usually require proof (such as a medical certificate).
- Within the first three days, you can still ask for proof, but if you do, the employer generally needs to cover the reasonable cost of getting that proof.
In real terms, this means you should think carefully before requesting a medical certificate on day one or day two. If you’re going to request it, make sure you’re prepared to pay for it, and apply your approach consistently across your workplace.
If you’re collecting medical certificates or other health information, you’re dealing with sensitive personal data. You should:
- only collect what you actually need
- store it securely
- limit who in your business can access it
- avoid sharing details unnecessarily
Even if your business is small, good privacy habits help reduce risk and build trust. If you collect and store employee information, having a clear Workplace Policy around privacy and records is a practical step.
Do Employees Have To Tell You What’s Wrong With Them?
Often, employees can give a general explanation (for example, “I’m unwell and can’t work today”) without disclosing detailed medical information.
You can ask reasonable questions relevant to running your business (like expected duration of absence, whether they’re fit for specific duties, or whether any workplace adjustments are needed). But you should be careful not to push for private details that aren’t necessary.
If it’s a complex situation (for example, repeated absences, a potential underlying condition, or disputes about whether sick leave is genuine), it’s smart to get advice early rather than letting it spiral into a formal process.
Sick Leave For Part-Time, Casual, And Contractor Arrangements
Not every worker fits neatly into “full-time permanent employee”, and this is where businesses often trip up.
Part-Time Employees
Part-time employees can still be entitled to sick leave. The entitlement is not reserved for full-time workers only.
The key is whether they meet the eligibility requirements. Once they do, they generally receive the same minimum sick leave entitlement (10 days per year), regardless of whether they work fewer days each week.
In practice, this can mean a part-time employee may have enough sick leave to cover more than their typical weekly hours, because the entitlement is measured in days rather than hours. This is one of the reasons leave calculations and payroll settings need to be handled carefully.
Casual Employees
Casual employment is often misunderstood. Some “casual” employees in practice are actually working regular patterns and may meet eligibility requirements for leave entitlements.
If you label someone casual but treat them like a regular employee (consistent roster, ongoing work, expectation of availability), you may still have leave obligations.
If you’re not sure where your business stands, it’s worth reviewing your arrangements and documents. casual workers leave entitlements is a helpful reference point, especially if you’re in hospitality, retail, or seasonal work.
Contractors (And Why Classification Matters)
Independent contractors generally aren’t entitled to sick leave under the Holidays Act, because they’re not employees.
But here’s the catch: calling someone a contractor doesn’t automatically make them one. If the relationship looks and feels like employment (set hours, high control, inability to subcontract, integrated into your business), there’s a risk of “sham contracting”, which can create legal exposure.
If you engage contractors, you should use a properly drafted agreement and make sure the working relationship matches the contract. Otherwise, you may unintentionally take on employee obligations (including leave).
How Employers Can Manage Sick Leave Fairly (Without Creating Legal Risk)
Most sick leave issues don’t come from bad intentions. They come from unclear expectations, inconsistent decision-making, and missing documentation.
Here are practical ways to manage sick leave fairly while protecting your business from day one.
1. Set Clear Expectations In Writing
At minimum, employees should know:
- who to contact if they’re sick
- when they need to contact you (e.g. before shift start)
- whether a text is acceptable or if a phone call is required
- how proof requirements work
- what happens if they run out of sick leave
These basics are often best placed in a staff handbook so they’re easy to update without renegotiating employment agreements. Many businesses wrap this into a Staff Handbook so policies are consistent and accessible.
2. Be Consistent Across Your Team
If you require a medical certificate for one employee’s 2-day absence, but never ask others, you can create resentment and potentially complaints about unfair treatment.
Consistency doesn’t mean treating every situation identically (there are always nuances), but it does mean applying the same general rules and documenting why you made exceptions.
3. Understand What Happens When Sick Leave Runs Out
If an employee has no sick leave left, they might request:
- annual leave
- unpaid leave
- alternative duties or working from home (if feasible)
You don’t always have to agree to every request, but you should consider them reasonably and communicate clearly.
Where the absence is ongoing or repeated, it can shift into a wider discussion about performance, medical incapacity, and workplace support. Those situations can be legally sensitive, so it’s worth getting advice before taking action.
4. Don’t “DIY” Changes To Entitlements
You generally can’t reduce minimum leave entitlements, and if you want to provide additional benefits (or tailor them), it needs to be documented properly.
This is where good drafting in your employment documents matters. If your sick leave rules are unclear or contradictory (employment agreement says one thing, policy says another, payroll does a third), that’s when disputes happen.
If you’re setting up a new team, or you’re reviewing existing documents, start with the essentials: a clear Employment Contract and straightforward workplace policies that match how you actually operate.
5. Keep Good Records
Accurate leave records are not just “nice to have” - they’re part of running a compliant workplace. Good records help you:
- pay employees correctly
- avoid disputes about leave balances
- respond quickly if an employee raises a concern
- show compliance if you’re ever challenged
If you’re unsure whether your leave records and calculations are correct, it’s better to fix it early. Leave issues can become expensive (and time-consuming) if they snowball across multiple employees over a long period.
Key Takeaways
- In New Zealand, eligible employees are generally entitled to 10 days’ paid sick leave per year as a minimum.
- Employees usually become eligible for sick leave after 6 months of employment (depending on their work pattern and hours).
- Unused sick leave can carry over, but employers generally only have to allow it to accumulate up to 20 days (unless you offer more).
- Sick leave can cover physical illness, injury, and mental health, and it can also be used to care for a dependent who is unwell.
- Employers can ask for proof (like a medical certificate) in certain situations, but requests within the first three days often mean the employer must pay the reasonable cost.
- Part-time and some casual employees can still have sick leave entitlements, so worker classification and documentation matter.
- Clear employment documents and consistent policies help you manage sick leave fairly and reduce the risk of disputes.
If you’d like help getting your leave entitlements, policies, and employment documents set up properly (or you’re dealing with a tricky sick leave situation), you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.
