About OzInvestCalc

OzInvestCalc makes free calculators for Australian property and share investors. Each one answers a single question — what an investment property really costs you each week, or how much tax a sale will trigger — using the current ATO rates and the law as passed by Parliament.

It is built by an Australian software developer who invests in property and shares, and who wanted calculators that keep up with rule changes such as the 2027 negative gearing and capital gains tax reforms.

How we keep the calculators accurate

• Tax rates come from the ATO; law changes from the Act and the Parliamentary Library's Bills Digest.
• Every calculator is tested against worked examples before it is published.
• Each page shows the date it was last checked, and we update them when the rules change.

What OzInvestCalc is not

The calculators give general estimates, not personal financial or tax advice. Your situation may differ — confirm with the ATO or a registered tax agent before you act.