Using the tax withheld calculator

The easiest and quickest way to work out how much tax you should withhold is to use the tax withheld calculator on the ATO website.

To use the calculator, you’ll need to provide information such as:

  • income tax rates
  • Medicare levy
  • study and training support loan contributions
  • worker residency status
  • tax-free threshold.

The calculated results are based on the information you provide at the time of calculation. You should use the results as estimates, and for guidance only.