Overtime and penalty rates increase your gross income for the pay cycle, which increases PAYG withholding for that period. This can make your take-home pay vary week to week.
Penalty rates apply for weekends, public holidays, late shifts, or overtime depending on your award or enterprise agreement.
Why tax seems higher when you work overtime: Progressive tax brackets and PAYG formulas withhold more tax when your earnings spike for the week or fortnight.
Superannuation on overtime: Many awards include super on overtime, but some do not. Your payslip should show which hours attracted super.
This calculator models overtime indirectly by letting you increase your hourly input. It does not apply award-specific overtime multipliers.
Call to action: Estimate your overtime pay by adjusting your hourly rate or hours worked in the main calculator.