Buying a property? Provides links to state and territory calculators for stamp duty.
Choose an estimator to calculate your entitlements e.g Centrelink payments, child support and child care. Online estimators let you estimate or compare payments, based on your current or proposed circumstances.
Department of Human Services
Postal charges vary depending on the item and its destination. Get an estimated price for sending letters and parcels to local and international destinations.
Australian Postal Corporation