OzMoneyTools

OzMoneyTools methodology

This page explains how OzMoneyTools estimates Australian take-home pay. It is designed for planning and comparison, not as personal tax advice. For official determinations, use ATO resources or a registered tax professional.

1) Core inputs

  • Tax year
  • Gross income and pay frequency
  • Whether salary includes super
  • Residency (resident vs foreign resident)
  • Medicare levy and MLS settings
  • HECS/HELP status
  • Deductions and income-test adjustments

2) Taxable income estimate

The model estimates taxable income from salary and deduction inputs. In simplified form:

taxable income ≈ cash salary − deductions

Not every offset, rebate, exemption, or niche circumstance is modelled in every scenario.

3) Income tax calculation

Income tax is calculated using year-specific tax brackets and residency rules loaded in the app. The tax tables used by OzMoneyTools are aligned to published ATO rates for the configured year.

4) Medicare levy and MLS

For eligible residents, the Medicare levy is generally modelled at 2% of taxable income, with low-income reductions where configured thresholds exist.

Medicare Levy Surcharge (MLS) can apply if income is above tier thresholds and eligible private hospital cover is not held.

5) HECS/HELP repayment estimate

When HECS/HELP is enabled, repayment is estimated from repayment-income assumptions and threshold bands for the selected tax year.

6) Why results can differ from payslips

  • PAYG withholding is done per pay run, with rounding behavior.
  • Employer payroll systems can apply additional settings not entered in the calculator.
  • Offsets, reportable benefits, and one-off payments can change annual outcomes.
  • Legislative updates may happen before every calculator page is refreshed.

Primary references

Open calculator