James Crawford
Software and product developer. Builds and maintains Aussie Pay Calc, which he runs as a sole trader in Australia.
What he does on the site
- Builds every calculator on the site, for pay, tax, super, leave, family payments, property and investing.
- Checks rates and thresholds against ATO and government publications and updates them each 1 July.
- Tests the calculators against official worked figures. The tax withheld calculator matches all 720 sample amounts in the ATO's 2026-27 withholding schedules, and the stamp duty calculator is checked against 29 official state examples.
What the site does and does not do
The calculators explain the rules and work out your numbers. They are general information, not financial or tax advice. For the rates used, what each calculation includes and its limits, see how our calculators work.
Contact
Spotted an error or out-of-date figure? Email hello@aussiepaycalc.com.au. More about the site and how it is funded is on the about page.