What is that overtime worth?
Put in your current income and the overtime or penalty rate. You get what those hours add after tax, Medicare, and optional HELP.
How the numbers work
Gross overtime is the hourly rate times the hours in the week, fortnight, or month you picked. The rate is either a dollar amount, or your ordinary hourly rate times 1.5, 2, or a multiplier you enter. Weekly, fortnightly, and monthly income is annualised first (×52, ×26, or ×12). Tax is the top slice: income tax, Medicare, and HELP on your annual income plus this period's overtime, minus the same bill on the annual income alone. It does not assume you work that overtime every period.
Income tax uses the ATO's 2026–27 resident rates (income year from 1 July 2026): nil to $18,200, then 15c, 30c, 37c, and 45c in the dollar. Claiming the tax-free threshold is the default. If you turn it off — a second job, typically — the first $18,200 is taxed at 15c as well. Medicare is 2% of taxable income, with the ATO low-income shade-in: nothing at or below $28,011, then 10c in the dollar until $35,013, then the full 2%. The Medicare levy surcharge is left out. HELP, when switched on, uses the 2026–27 compulsory repayment thresholds — nil to $69,528, then 15c and 17c in the dollar, and 10% of repayment income from $186,051. The annual income plus this overtime stands in for repayment income. A remaining balance, if you enter one, caps that year's repayment. Low income tax offset and other offsets are left out.
Net overtime is the gross minus that extra tax, Medicare, and HELP. Effective net per hour is the net divided by the hours. This is an estimate only — not tax advice and not the ATO withholding calculator. Everything runs in your browser. Your last set of numbers is remembered on this device and never leaves it.