When you buy a property or a land in Australia you have to pay a stamp duty on your purchase. Stamp duty sometimes called “transfer duty” in Australia. Stamp duty tax is one of the main revenue streams for the state or territory governments. Each state or territory uses different formulas to calculate it. Exemptions and concessions are also different, so it’s a real headache if you want to find out how much stamp duty you should pay. Official governmental websites also not helping much – their calculators are dated and too complicated.