Zero-hours and casual work in Australia
Reviewed by Mellow Editorial Team, HR & payroll content team
Casual and zero-hours arrangements in Australia give employers genuine flexibility, but they come with specific legal obligations that differ meaningfully from permanent employment. Here is what you need to know before engaging casual workers.
"Zero-hours contracts" are not a recognised Australian concept
The term "zero-hours contract" is common in the UK and New Zealand, but Australian employment law does not use that label. What Australia has instead is casual employment — a long-established category with its own rules under the Fair Work Act and most modern awards.
A casual employee has no guaranteed hours, no firm advance commitment to ongoing work, and no expectation of continuing employment. That informality is the defining feature. In exchange, casual employees receive a casual loading — typically 25% on top of the base rate under most modern awards — to compensate for the lack of leave entitlements and job security. Always check the applicable modern award or enterprise agreement for the exact loading that applies to your industry.
What casuals are entitled to — and what they are not
Because casual loading substitutes for certain entitlements, casual employees do not accrue paid annual leave or paid personal/carer's leave in the way permanent employees do. They are, however, entitled to unpaid carer's leave and unpaid compassionate leave from day one.
What casuals do receive:
- Superannuation. From 1 July 2026, the Superannuation Guarantee sits at 12% of ordinary time earnings. This applies to casual employees without exception — there is no minimum-hours threshold for super eligibility, though a monthly earnings floor applies for workers under 18 and some other situations. Check the ATO's current rules carefully.
- PAYG withholding. You must withhold income tax from every casual pay run and report it through Single Touch Payroll (STP) at each pay event. Finalisation is due by 14 July after the end of each financial year.
- HECS/HELP repayment. If a casual employee has a study debt, you must withhold at the correct banded rate once their income crosses the repayment threshold. The employee should provide you with an updated Tax File Number declaration or withholding variation so you have the right information.
- Medicare levy. The 2% Medicare levy is factored into standard PAYG withholding tax tables.
- Casual conversion rights. Under the National Employment Standards, a long-term casual who has worked a regular pattern of hours for at least 12 months has the right to request conversion to permanent employment. From late 2024, "employee choice" provisions also allow eligible casuals to make that request directly. Employers have limited, defined grounds for refusing.
The regular and systematic trap
Many employers engage casual staff intending genuine flexibility, then fall into a pattern where the same person works the same shifts every week for months or years. Courts and the Fair Work Commission have consistently held that a regular and systematic pattern of engagement can give casuals access to entitlements closer to permanent employment — including unfair dismissal rights after six months (or 12 months for small businesses) and, in some cases, notice obligations.
The practical implication: review your casual roster periodically. If someone's hours are predictable and ongoing, consider whether casual status genuinely reflects the arrangement — and whether the casual loading you are paying is actually compensating for anything.
Payroll mechanics for casual workers
Running payroll for casuals has a few moving parts worth flagging:
Irregular pay cycles. Casuals often work variable hours week to week. Your payroll process needs to handle timesheet-based pay rather than a fixed salary. STP requires you to report at each pay event regardless of how often that occurs.
Ordinary time earnings for super. Super is calculated on ordinary time earnings, not total pay. Overtime does not attract the Superannuation Guarantee, but regular casual hours generally do. Keep clear records of what is ordinary time versus overtime, particularly where awards define those boundaries.
Record-keeping. The Fair Work Act requires you to keep accurate time and wages records for seven years. For casual employees — whose hours change — this means reliable timesheet data, not estimates. Gaps in records tend to work against employers in any dispute.
Distinguishing genuine casuals from disguised employees
The ATO and Fair Work both scrutinise arrangements where someone is labelled casual but works in conditions that look more like permanent employment. The risk is not just back-payment of entitlements; it can include penalties for sham contracting if the arrangement crosses that line.
The key factors regulators look at: whether there is a firm advance commitment to future work, the degree of control the employer exercises, whether the worker can sub-contract or work for others, and whether the economic reality matches the label in the contract.
Reviewing the actual working arrangement — not just the contract — before engaging someone as a casual is the most straightforward way to stay on the right side of these rules. If the role is ongoing and the hours are predictable, a permanent part-time arrangement may be cleaner legally and administratively.
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