australian payroll calculator

How this Australian payroll calculator works

This calculator annualises your gross pay from your selected pay cycle (weekly, fortnightly, monthly, or annual), then estimates:

• Income tax using resident or non-resident rates
• Low Income Tax Offset (for residents)
• Medicare levy (for residents, with a low-income phase-in approximation)
• HELP/HECS repayment based on estimated annual taxable income
• Super contribution based on your selected super rate

It then converts annual estimates back to your pay period so you can see a practical “what lands in my account” figure.

What to enter in each field

Gross pay per period

Enter the amount before tax and before post-tax deductions. If your pay changes from period to period (for example, casual hours), use an average for a smoother estimate.

Salary sacrifice (pre-tax)

This reduces taxable income before PAYG withholding is estimated. Common examples include additional super salary sacrifice arrangements.

Post-tax deductions

These are deductions applied after tax is calculated, such as certain benefits, repayments, or internal payroll deductions.

Tax residency and HELP debt

Residency affects tax brackets and Medicare levy assumptions. Selecting HELP debt adds an estimated compulsory repayment based on annualised income.

Tax assumptions used (estimate model)

The calculator uses simplified annual tax logic suitable for planning and budgeting. It does not replicate every ATO payroll table rule or edge case.

• Resident rates: modern 16% / 30% / 37% / 45% structure above the tax-free threshold.
• Non-resident rates: no tax-free threshold and higher initial effective tax treatment.
• LITO: included for residents with a tapered model.
• Medicare levy: 2% with a low-income phase-in approximation.
• HELP: bracket-based repayment rate model for annual income.

Why your payslip may differ

Real payroll outcomes can differ due to factors like salary packaging details, leave loading, bonuses, overtime multipliers, awards, exact ATO withholding tables, Medicare levy reduction rules, and employer payroll software rounding.

Use this tool as a high-quality estimate, then verify with your employer payroll team, accountant, or official ATO resources for final decisions.

Payroll planning tips

• Check super rate and contribution caps regularly.
• If income varies, calculate multiple scenarios (low/average/high pay periods).
• Track annual taxable income when HELP repayments apply.
• Review salary sacrifice strategy before financial year-end.