Reasonable Overtime: What Australian Employers Need to Know

Overtime is a common part of the Australian workplace. Whether it’s a busy period in hospitality, a rush to complete a client project, or covering shifts for a sick employee, most businesses will ask staff to work extra hours from time to time. But how do you know when overtime expectations are fair - and what exactly is “reasonable overtime” under Australian law?

If you’re running a business or managing staff, getting overtime right is essential. Misunderstandings can lead to disputes, low morale, or costly Fair Work claims. At Sprintlaw, we’re here to help you navigate the workplace rules, so you can get the best out of your team and stay compliant. In this article, we’ll break down the definition of reasonable overtime in Australia, what counts as “reasonable” in practice, and what your legal responsibilities are as an employer.

Keep reading for the key facts, important legal considerations, and answers to those common questions about overtime and employment law compliance.

What Is Overtime? A Quick Refresher

Overtime is any work performed outside an employee’s ordinary hours of work, as set out in their contract, applicable Modern Award, or Enterprise Agreement. This might be more than the standard 38-hour week for a full-time staff member, or beyond the “ordinary hours” defined for part-timers and casuals.

In Australia, overtime is usually paid at a higher rate (such as “time and a half” or “double time”), but specific rates and entitlements depend on the employment instrument covering the role. For some employees, compensation may come in the form of time off in lieu (TOIL) instead.

You can read more about award wages & overtime and how they’re calculated for different award classifications.

Definition Of Reasonable Overtime: What Does The Law Say?

The concept of “reasonable overtime” comes directly from the Fair Work Act 2009 (Cth). Specifically, the National Employment Standards (NES) provide that employers can only require - or request - an employee to work overtime if it is reasonable.

According to Section 62 of the Fair Work Act, employees have the right to refuse unreasonable overtime. This places clear limits on how many additional hours you can ask someone to work, even if they receive penalty rates or TOIL as compensation.

So, what is reasonable overtime? In summary:

• Reasonable overtime refers to additional hours that are fair and appropriate, after considering all the relevant circumstances. If the request or requirement meets the legal definition of “reasonable,” the employer can expect the employee to work those extra hours. If it does not, the employee is entitled to refuse.

What Factors Determine Reasonableness?

The Fair Work Act sets out a non-exhaustive list of factors for deciding whether overtime is reasonable, including:

• Any risks to employee health and safety from working the extra hours
• The employee’s personal circumstances (such as family or caring responsibilities)
• The needs of the workplace or business at the time
• How much notice the employee receives about the overtime
• The amount of notice the employee gives if they cannot work overtime
• Whether the employee is entitled to receive overtime rates, penalty rates or other compensation
• Any terms of the employment contract, award, or enterprise agreement relating to overtime
• The usual workload in the industry
• Whether the additional hours are in accordance with averaging arrangements
• Any other relevant matter

No single factor is decisive, but health, safety and work-life balance tend to carry particular weight in most disputes.

How Many Hours Is Reasonable Overtime In Australia?

There is no set number of overtime hours that will always be “reasonable.” The law recognises that different jobs, industries and circumstances may justify different requirements.

That said, the NES establishes 38 hours per week as the standard ordinary hours for a full-time employee. Anything above that generally counts as overtime. However, employers may request or require additional hours - as long as those additional hours are reasonable in the specific context.

Examples Of Reasonable (And Unreasonable) Overtime

Let’s look at some typical scenarios:

• End of financial year in accounting: An accountant might be asked to work several extra hours a week processing returns. If there is adequate notice, no health issues, and penalty rates are paid, this will likely be reasonable - especially if it’s a temporary peak period standard for the profession.
• Restaurant working late into the night: Calling in a chef to work two extra hours on a Saturday night, with proper pay, may be reasonable. But requiring them to work back-to-back 14 hour shifts for weeks on end is likely unreasonable, due to fatigue risks.
• Sudden staff absence in retail: If your only available staff have caring responsibilities and you give them no notice, requiring overtime may become unreasonable under the law - even if you pay overtime rates - because of their personal circumstances.

The key takeaway? You need to assess overtime requests on a case-by-case basis, balancing your business needs against your employees’ wellbeing and rights.

For further reading about working hours and the law, see our article: Weekly Working Hours: Australian Legal Limits & Expectations.

Is There A Maximum Overtime Limit?

The maximum weekly hours for a full-time employee under the NES is 38 hours, plus “reasonable additional hours.” There’s no set, universal cap on overtime, but if the amount you’re requiring becomes unreasonable - even if it’s industry practice - an employee can lawfully refuse.

Relevant Modern Awards or Enterprise Agreements may include more specific limits (for example, caps on daily hours, minimum breaks between shifts, or maximum consecutive days). Always check the relevant industrial instrument as the starting point for lawful overtime hours in your industry.

Do I Have To Get Employee Consent For Overtime?

Generally, you may require overtime if the employment contract, award or enterprise agreement allows it, as long as the overtime is reasonable. In some cases, particularly for non-award employees or where there is no contractual obligation, overtime should be mutually agreed.

Regardless, it’s best practice to give as much notice as possible and seek employee input - especially if there are personal circumstances that might make overtime more difficult (health, family needs, etc.).

Where an employee refuses to work overtime on “reasonable” grounds (such as a health or safety risk, or significant family responsibilities), they are protected from adverse action under the Fair Work Act. Employers should be careful about pushing back or taking disciplinary action in these cases.

How Should I Compensate For Overtime?

Compensation for overtime is not just about paying extra. It’s about making sure your business is compliant with both the law and relevant industrial awards or agreements. Typically, the options are:

• Overtime rates: Penalty rates on top of the employee’s usual pay for extra hours (e.g., time and a half, double time, etc.), as set out in the relevant award or agreement.
• Time off in lieu (TOIL): Offering paid time off instead of overtime payment, if the employee agrees and the option is included in your workplace agreement or policy.
• Salaried employees: If an employee’s salary is “all-inclusive,” check whether it truly covers reasonable overtime, and ensure it meets or exceeds minimum award entitlements. Otherwise, overtime is likely payable on top.

Be sure to check the Fair Work Award or Enterprise Agreement relevant to your staff, as these will specify the correct overtime rates and process for your industry. Many awards also require record keeping (like overtime hours, start/finish times, breaks) to avoid future disputes.

What If An Employee Refuses Reasonable Overtime?

Employees are entitled to refuse overtime if it is “unreasonable.” If, after considering all factors, the overtime is in fact reasonable, you may have grounds to address the refusal as a performance or disciplinary issue, provided you act fairly and consistently.

However, if an employee’s refusal is based on personal health, family emergencies or another protected reason, you need to tread carefully to avoid claims of unfair or adverse action. Consult legal guidance before taking any next steps if you believe a refusal is not justified - you may need to reassess the circumstances or adjust your workplace expectations.

To learn more, see our guide on Navigating Unfair Dismissal & Adverse Action in Australia.

Key Employer Obligations For Reasonable Overtime

Here’s what you need to think about as a business owner or manager in Australia:

• Comply with the NES and Awards: Ensure any overtime requests comply with the allowable maximum weekly hours, and that you consult the relevant Award or Agreement for your sector.
• Consult with employees: Whenever possible, give reasonable notice and discuss overtime needs, rather than simply imposing them.
• Consider health, safety, and personal circumstances: Don’t just look at business needs - factoring in employee wellbeing is a legal requirement.
• Record and pay overtime accurately: Keep records of all hours worked and pay all entitlements (overtime rates or TOIL) as required under the relevant contract or award.
• Review employment contracts: Ensure all staff contracts and policies reflect how your business will manage overtime, in language consistent with NES standards and applicable Awards.
• Be alert to disputes: Where disagreements arise, treat concerns seriously, consult Fair Work guidance, and if needed seek legal advice before acting.

Employment Contracts & Workplace Policies: Why They Matter

A clear, well-drafted employment contract is the foundation for your relationship with your staff. Your contract should specify ordinary hours of work, the process for overtime, and how overtime is compensated, aligned with the NES and any relevant Award.

In addition, having up-to-date workplace policies on overtime, rostering, and leave entitlements can help set expectations, reduce misunderstandings, and protect your business in the event of a dispute.

If you’re not sure whether your contracts or policies meet current requirements, consider using our Legal Health Check or speaking to our team about employment contract reviews and templates.

Other Legal Considerations Around Overtime

Workplace Health & Safety

Employers have a duty under Work Health and Safety (WHS) laws to provide a safe working environment. This includes managing risks from fatigue and overwork due to long or irregular overtime hours.

For more information, read our guide on workplace health and safety obligations.

Annualised Salary & Overtime Risks

If you pay employees on an “annualised salary” intended to include all overtime, make sure it is sufficient to cover all minimum Award entitlements including overtime and penalty rates. Otherwise, your business could be at risk of a substantial underpayment claim.

Record-Keeping

Under the Fair Work Act and Fair Work Regulations, businesses must keep complete records of hours worked, overtime arrangements, and payments. Failing to do so could mean penalties even if the underpayment was unintentional.

What Legal Documents Will I Need?

If your business involves any staff, here are the key contracts and documents to consider:

• Employment Contract: Outlines each employee’s hours, overtime process, pay rates, and rights.
• Workplace Policies: Such as Overtime Policy, Leave Policy, and Fatigue Management Policy, to ensure you are managing compliance and risk.
• Payroll and Time-Keeping Records: Systems for accurately tracking hours worked, overtime claimed, TOIL provided or paid, and breaks taken.
• Fair Work Information Statement: Must be given to each new employee, summarising NES rights and obligations.
• Work Health & Safety Policy: If you have 5 or more staff, a WHS policy helps address employer duties (including safe management of overtime and fatigue).

Not every business will require every document listed, but most employers should have the first three as a minimum. Our employment contracts and workplace policies can be tailored to suit your business’s overtime needs.

Key Takeaways

• “Reasonable overtime” means additional hours that are fair and appropriate, after weighing all the factors set out in the Fair Work Act.
• Determining what is “reasonable” depends on health, safety, business needs, notice, compensation, and employee personal circumstances - there is no universal rule.
• Employees have the right to refuse overtime that is unreasonable under the law, and employers should respect safe working limits.
• Always refer to both the National Employment Standards and the applicable Award or Enterprise Agreement for overtime rules, rates, and expectations.
• Keep accurate records, ensure employment contracts and workplace policies align with the law, and get legal advice if unsure how to handle overtime or a dispute.
• Managing overtime well isn’t just a compliance task - it makes your business a fair, attractive place to work and avoids costly Fair Work claims down the track.

If you would like a consultation about managing reasonable overtime, employment contracts, or workplace policies for your Australian business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.