Australian property tax rules changed in June 2026, and a calculator written before that date now gives the wrong answer to a large group of investors. These are the tools that account for it, with the tax figures they use dated and sourced on the page.
The negative gearing calculator is the one to start with if you own or are buying a rental property. The Treasury Laws Amendment (Tax Reform No. 1) Act 2026 quarantines residential rental losses from the 2027-28 income year, with two exceptions, so Australia now has three regimes running at once. Which one you are in turns on the contract date of your purchase and on whether the dwelling is new. It changes the answer far more than any number in the arithmetic does.
The offset account tools sit in their own group because offset accounts are an Australian and UK product rather than a universal one. The rental yield and cap rate calculator answers the question that comes before the tax question, which is whether the property earns its keep at all.
Every Australian tax figure these tools publish comes from a single register with a verification date attached, and each page shows when its figures were last checked against the issuing authority. Rates and thresholds move on the Australian Taxation Office schedule rather than ours, so check the source before relying on a figure for anything that matters.