depends on the state and depends on the term " deposit" In NSW its common that a .25 % exchange deposit is paid with a 5 to 10 day cool off. Thence at formal exchange 5 to 10 % as per above post. If we are talking settlement/lender deposit, anywhere from 5 to 100 % + costs Other states are little different - for eg in qld 1 to 5000 at initial contract signing, thence another 5 to 15 000 is normalish. One big difference in qld is that one should minimise the deposit, since if you cant settle on the day, with most QLD contracts being " time of the essence" = settle on the day or legally lose deposit and house. The larger the deposit the bigger the risk of that happening, and the vendor not extending - especially in a hot market if they can onsell to someone else at a higher price. ta rolf