The BankSA, also known as the Bank of South Australia, is a financial institution that provides various banking products and services to its customer base across the country. This subsidiary of Westpac is the largest bank in South Australia. The bank caters to its personal, business and corporate clientele. The bank offers customers lucrative schemes and attractive interest rates on various products. Currently, customers with BankSA can avail of a $4,000 cashback on home loan products.