Although it is true that it is not forbidden under the laws of NSW, QLD, SA, TAS, VIC, and WA, this type of surrogacy is unadvisable in all cases. It increases the risk for the surrogate to decide to keep the baby after giving birth, given that she is genetically linked to him/her.
Read the full article on: Surrogacy in Australia – Is Commercial Surrogacy Allowed? ( 28).