Tax Calculator

This tax calculator is available free of charge to download and contains calculation formulae for the 2018, 2019 and 2020 tax years.

This is a simple spreadsheet calculator which enables the calculation of income tax plus Medicare Levy and the low income offsets for taxable income on an annual basis.

The calculation formulae have been conveniently captured in a spreadsheet format which is unprotected, so as to give you maximum flexibility in checking and assessing your tax position. Formulae can be edited.

The calculator automatically includes the low income tax offsets, and can optionally include medicare levies.  There is also a scratch pad area where you can play with offset values (rebates), enter tax credits and see outcomes on a weekly/monthly/ annual pre-and post tax basis.

Note: For the accurate calculations of employee tax withholding (PAYG) obligations, slightly different formulae are used, and there is a specific calculator for that here.

Use of the spreadsheet requires MS Excel Windows versions.

Download now

Request a download – simply send an email with the words “tax calculator” anywhere within to atotaxrates(at)

You will be immediately emailed your download link. Your privacy is respected and assured. The email address you provide is only used for this purpose and there is no follow up unless you request something else or have a question.


This page was last modified 2019-07-04