Sick Leave: What It Is and How It Works
Sick leave is time off work that an employee can take when they are unwell or injured — paid or unpaid time to recover, without losing their job or (where it is paid) their income.
It is one of the most common employment entitlements in the world, though the detail — how much you get, whether it is paid, and what evidence is required — varies widely by country. Australia’s paid entitlement is notably generous by global standards, and sick leave is often combined with Carer’s Leave into a single personal leave entitlement.
It applies right across the workforce, but in a contact centre — where service levels depend on having enough people rostered — sick leave is also a core part of Workforce Management. This guide explains what it is, how it generally works, and why it matters.
What it is
Time off work for an employee’s own illness or injury, paid or unpaid depending on the jurisdiction.
Why it matters
It protects employees when they’re unwell — and, being unplanned, is a real part of contact centre shrinkage.
What this guide covers
What sick leave is, how it generally works, how it relates to other leave, and why it matters at work.
What is sick leave?
Sick leave (sometimes called personal leave or sick and carer’s leave) is a type of leave that lets an employee take time off when they are ill or injured and unable to work. In many places the same entitlement also covers caring for a sick family member, which is why it is often grouped together as personal leave.
Whether it is paid, how much is available, and what proof an employer can ask for are all set by employment law and the employer’s own policy — so the specifics differ considerably between countries and organisations.
Entitlements vary — always check local law
This is a general explanation of the concept, not legal advice. Whether sick leave is paid or unpaid, how much is available, how it accrues, and what evidence is required all depend on the country, jurisdiction and employment agreement. Employers and employees should check the rules that apply to them.
For the Australian entitlement, see the dedicated section below. Members in other countries should check their own national or state workplace authority.
✓ Sick leave is
- Time off for an employee’s own illness or injury
- Often part of a combined personal leave entitlement
- Paid or unpaid depending on the jurisdiction
- Governed by local law and employer policy
✗ Sick leave is not
- Ordinary holiday or annual leave
- The same rules everywhere — entitlements vary widely
- Only for caring for others (that leans on carer’s leave)
- Necessarily unlimited or always paid
How it generally works
The specifics differ by country, but most sick leave arrangements share a familiar set of features.
Paid or unpaid
Many jurisdictions provide a set amount of paid sick leave; some provide unpaid leave, or a mix of paid then unpaid.
How it accrues
Entitlement is often earned over time worked or granted as a set amount per year, and may carry over or reset.
What it covers
The employee’s own illness or injury — and, where combined as personal leave, caring for a family member too.
Notice and evidence
Employees usually notify as soon as practical, and may be asked for evidence such as a medical certificate.
Usually unplanned
By nature it happens at short notice, which is exactly what makes it a live workforce-management issue.
Job protection
In most systems, taking legitimate sick leave protects the employee’s job while they recover.
Sick leave vs other leave
It helps to see where sick leave sits alongside the other common leave types.
Annual leave
Planned holiday, booked in advance for rest and personal time — not tied to illness.
Sick leave
Time off for the employee’s own illness or injury — usually unplanned and evidence-based.
Carer's leave
Time off to care for someone else who is unwell. In many systems it shares a balance with sick leave as personal leave.
Sick leave in Australia
Australia is often a point of curiosity for people overseas when the subject of sick leave comes up — the paid entitlement is generous by international standards, and it’s worth setting out clearly for Australian members.
Under the National Employment Standards (NES), full-time employees are entitled to 10 days of paid personal/carer’s leave each year. It is a single combined balance covering both the employee’s own illness or injury (sick leave) and caring for an immediate family or household member (carer’s leave). Part-time employees receive a pro-rata amount, and unused leave accumulates from year to year rather than being lost.
Employers can generally ask for reasonable evidence, such as a medical certificate or statutory declaration, and employees are expected to give notice as soon as practical. Casual employees have different arrangements. For the current, authoritative detail on entitlement, accrual, evidence and eligibility, refer to the Fair Work Ombudsman.
Why it matters in the contact centre
Where service levels depend on having enough people rostered, sick leave is both a planning input and a people issue.
For workforce planners
Sick leave is part of shrinkage — the unproductive time built into staffing forecasts. Because it is unplanned, it is modelled as a rate, not a roster entry.
For team leaders
How you respond when someone is genuinely unwell shapes trust and culture — and pressuring sick people to work usually costs more than it saves.
For the business
Patterns in sick leave can signal wellbeing, burnout or engagement problems — useful early warning, as long as it’s read supportively, not punitively.
Industry benchmarking shows how much this adds up across the sector — and sick leave is a major driver of it:
Source: the 2026 Australian Contact Centre Industry Best Practice Report, which ACXPA contributes to. Absenteeism captures all unplanned absence, of which sick leave is a major part.
Managing it well
Sick leave can’t be scheduled, but it can be planned for and handled well.
Build it into shrinkage
Include sick leave in your shrinkage assumptions so forecasts and rosters reflect the unplanned absence that will happen.
Make the policy clear and fair
Ensure people know their entitlement and how to report absence, applied consistently, so being unwell isn’t made more stressful.
Look for patterns, supportively
Use absence data to spot wellbeing or engagement issues early — to help, not to punish. Genuine support reduces absence more than pressure does.
The rule of thumb
You can’t predict who will be sick on any given day, but you can predict that some will — so plan for the rate, and treat each person with care when it happens.
Frequently Asked Questions
What is sick leave?
Time off work an employee can take when they are ill or injured and unable to work. It is often combined with carer’s leave into a single personal leave entitlement, and the exact rules are set by local employment law and the employer’s policy.
Is sick leave paid or unpaid?
It depends on the country and the employment agreement. Many jurisdictions provide a set amount of paid sick leave; others provide unpaid leave, or paid up to a limit and unpaid beyond it. Always check the rules that apply where you are.
What is the difference between sick leave and carer's leave?
Sick leave is for the employee’s own illness or injury; carer’s leave is for caring for someone else who is unwell. In many systems the two share a single personal-leave balance, but the reason for the absence differs.
Do you need a medical certificate for sick leave?
Often, yes — employers may reasonably ask for evidence such as a medical certificate, particularly for longer absences, and usually expect notice as soon as practical. The specific requirements depend on local law and company policy.
How does sick leave affect contact centre staffing?
Because it is unplanned, sick leave forms part of shrinkage — the unproductive time built into staffing forecasts. Planners model it as a rate rather than a scheduled absence, so rosters still meet service levels when people call in sick.
Can high sick leave signal a bigger problem?
It can. Patterns or rising sick leave may point to burnout, wellbeing or engagement issues. Read supportively rather than punitively, it can be a useful early warning that something in the operation needs attention.
Where to next
Sick leave is one piece of the workforce-management and employee-experience picture. These are the places to take it next.
Summary: Sick Leave
Sick leave is time off work an employee can take when they are ill or injured — paid or unpaid time to recover, without losing their job. It is one of the most common entitlements worldwide, but the detail varies by country, and it is often combined with carer’s leave as a single personal leave entitlement.
It is usually unplanned, evidence-based for longer absences, and job-protecting. Because the specifics are set by local employment law, this is a general explanation rather than legal advice — in Australia, the Fair Work Ombudsman is the authoritative source, and other countries have their own.
For contact centres it lands in two places: workforce planning, where it forms part of shrinkage and is modelled as a rate; and culture, where handling illness supportively builds trust, and reading absence patterns can flag wellbeing problems early.
Plan for the rate, apply a clear and fair policy, and treat people with care when they’re unwell — and sick leave becomes a manageable, humane part of running a team rather than a source of friction.
