Everyone leaving Australia pays an A$55 departure tax, euphemistically known as a Passenger Movement Charge. It's included in your airline ticket price. There's also a 10% V.A.T. equivalent known as Goods and Services Tax (GST), which is included in displayed prices. There is a G.S.T. refund for visitors on purchases totaling more than A$300 made in one store. You need to keep the receipts for these and present them at the Australian Customs Services booths that are after passport control in international airports. The tax is refunded to a credit card, even if you paid cash for the purchases. Allow an extra 30 minutes for this process.