Monthly vs weekly payroll in Australia
Reviewed by Mellow Editorial Team, HR & payroll content team
Running payroll weekly, fortnightly or monthly in Australia is all legally permissible — the right choice depends on your award or enterprise agreement obligations, cash-flow position and administrative capacity.
What the law actually requires
No single federal law mandates a specific pay frequency. Instead, your obligations come from the relevant Modern Award or enterprise agreement covering your employees. Most awards specify a maximum interval between pay days — commonly weekly or fortnightly for hourly workers, and sometimes monthly for salaried staff. Check the specific award that applies before you change anything. Employees not covered by an award or agreement can generally be paid monthly, provided it is agreed in writing and is no less frequent than monthly.
The National Employment Standards do not prescribe pay frequency directly, but they do underpin minimum entitlements — including four weeks of annual leave — that must be funded and tracked accurately regardless of how often you run payroll.
How the mechanics differ by cycle
The underlying calculations are the same whether you pay weekly or monthly. Each pay run requires you to:
- Withhold income tax (PAYG) using the ATO's tax tables, which are calibrated to the pay period. A weekly pay run uses weekly tax scales; a monthly run uses monthly scales. The annualised tax outcome should be equivalent, but the table you apply must match your actual frequency.
- Calculate and report the Medicare levy, which sits at 2% of taxable income and is factored into the PAYG withholding tables automatically.
- Check for HECS/HELP obligations. If an employee has a study debt, you withhold additional amounts on a banded scale on top of standard PAYG. Again, the ATO publishes separate tables for each pay frequency — use the right one.
- Report via Single Touch Payroll (STP) at each pay event. This is not optional and does not wait until end of year. Every time you process a pay run, you send a report to the ATO. Weekly payroll means 52 STP submissions per employee per year; monthly means 12. Both are straightforward in any modern payroll platform, but the volume is worth considering if you are processing manually or on a basic spreadsheet.
Superannuation timing
Superannuation Guarantee contributions are set at 12% of ordinary time earnings. Regardless of how often you pay wages, super does not need to be paid at every pay event. The minimum legal requirement is quarterly, with payments due 28 days after the end of each quarter (28 October, 28 January, 28 April and 28 July).
That said, many employers — particularly those using payroll software — pay super with each pay run. This reduces the risk of a large quarterly liability building up and makes cash-flow more predictable. Neither approach is wrong; the quarterly deadline is simply the legal floor.
Practical trade-offs for employers
Weekly payroll suits workforces paid by the hour, shift workers, casual employees, and any workplace where the Modern Award specifies weekly pay. It keeps employees satisfied in roles with variable hours. The administrative cost is higher: four times the reconciliations, four times the STP lodgements, and more frequent bank transfers compared with monthly.
Fortnightly payroll is the most common cadence in Australia and balances frequency with administrative load reasonably well. It fits most awards, reduces the number of pay runs by half compared with weekly, and aligns neatly with the working fortnight that many rosters are built around.
Monthly payroll is common for salaried professional staff not covered by an award, or where an award permits it. It minimises administration and is straightforward to reconcile. The downside for employees is a longer wait between pays, which can affect morale and financial planning — worth weighing, particularly when hiring in competitive markets.
Year-end finalisation
Whatever frequency you run, the STP finalisation deadline is the same: 14 July following the end of the financial year. By that date, you must confirm to the ATO that all pay events for the year are complete and accurate. This triggers the pre-filling of employees' tax returns. If you have been reporting correctly at each pay event throughout the year, finalisation is largely administrative. Errors caught and corrected before 14 July are far less disruptive than amendments lodged after employees have already submitted their returns.
If you employ people across different countries and want to see how Australian payroll obligations compare to other jurisdictions, how Mellow runs payroll across six countries on one platform covers the structural differences in detail.
Making the decision
Start with the award. If it specifies frequency, you have limited discretion. If it does not, consider your workforce composition: a mix of casuals and part-timers generally warrants weekly or fortnightly; a stable salaried team can usually absorb monthly without complaint. Set a frequency and stick to it — changing mid-year creates reconciliation complexity and can disrupt employee trust.
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