During July they accounted for the largest portion of household deposits lodged with local banks.
Data published on Monday by the Australian Prudential Regulation Authority showed that retail customers had pumped in an extra $5.7 billion into their bank accounts in July, the bulk of which went to ANZ, Westpac, and St. George branches.
ANZ has been the fastest growing deposit taker in Australia over the past three years and received another $1.3 billion in July, taking its retail deposit base to $59.3 billion.
Due to all the money being pumped into bank accounts Westpac reached a milestone by holding more than $100 billion in deposits for its personal customers.
CBA is the market leader with $139 billion in retail deposits.