Growth in household deposits is slowing, as savers move their money out of at-call and term deposits in search of higher rates. Some deposit-taking institutions are experiencing substantial outflows.The Australian Prudential Regulation Authority's latest banking statistics show that the growth rate in household deposits for the 12 months to April was 7.6 per cent. It fell to an annualised rate of 4.8 per cent for the six months to April, and to 2.8 per cent annualised over the past three months.APRA's data shows some very significant outflows. Over the three months to April, Macquarie Bank's household deposit book reduced by 19.4 per cent, Investec's by 7.1 per cent, Beirut Hellenic's by 7.1 per cent and RaboDirect's by 6.3 per cent.It was not all a one-way traffic, however. HSBC's deposit book increased by 2.8 per cent over the three months to April, Suncorp's increased by 2.4 per cent and ING Direct's increased by 1.7 per cent.Among the Big Four, Commonwealth Bank's household deposits have increased by 1.1 per cent over the past three months, Westpac's by one per cent, NAB's by 0.8 per cent and ANZ's by 0.7 per cent.ME Bank was an outlier in the survey, with a 59.4 per cent increase in deposits over the past year. The bank has maintained this growth; over the past three months its deposit book has grown by 28.9 per cent.ME Bank's chief executive, Jamie McPhee, said in a statement: "One area where we've really appealed is the way we manage our maturing term deposit profile, where we take a much fairer approach than the other banks."Making sudden rate cuts of two per cent on term deposits is an unfair practice that many banks use to their own ends, giving them access to cheaper money at the expense of depositors who forget to check their rates at roll-over."