The fee for buying and selling coins for AUD is between 2% to 3% depending on the coin, the exact rate is listed on the buy and sell page for each coin. When trading between coins the fee is 1%.
Market orders have a 0.9% fee and the fee is taken out of the total BTC, LTC or DOGE you receive.
You can read more about our fees here: https://www.coinspot.com.au/fees
For AUD Deposits, there are no fees for POLi deposits, 3% fees for blueshyft cash deposits and 0.9% fee for BPAY deposits.