Overtime Tax Calculator
See how much of your overtime pay is lost to tax in Australia by comparing your tax payable with and without the extra overtime income.
Your results
Calculation breakdown
- Extra tax
- Extra tax = tax on (base + overtime) − tax on base alone
- Net overtime
- Net overtime kept = overtime pay − extra tax
Worked example
On a $75,000 base salary, adding $8,000 of overtime increases tax by about $2,960, so roughly $5,040 of the overtime is kept after tax — an effective rate near 37%.
Assumptions
- Assumes overtime is added on top of an existing base salary in the same financial year.
- Excludes superannuation and any penalty rate loadings beyond the amount entered.
How this calculator works
This calculator compares total tax payable on your base annual salary against tax payable once overtime earnings are added, isolating exactly how much extra tax the overtime attracts. It uses the resident tax brackets and Medicare levy so you can see your real after-tax overtime pay.
Rates sourced from the Australian Taxation Office for the 2026–27 financial year. Last reviewed 01/07/2026.
Frequently asked questions
Why is my overtime taxed at a higher rate?
Overtime is taxed at your marginal rate because it is added on top of your base income, which may sit in a higher tax bracket.
Is overtime tax withheld differently to normal pay?
Payroll systems often withhold more tax from a pay period containing overtime, but this evens out at tax time based on total annual income.
Does this include superannuation on overtime?
No, this calculator focuses on income tax only; check your award or agreement for whether super applies to your overtime.
Rates and thresholds are configured for the 2026–27 Australian financial year and should be reviewed when government settings change.