New research from Roy Morgan shows that in the six months to June 2017, there were 8.3 million people using mobile banking in an average four week period, up from 4.8 million in 2013. Much of this change can be explained as branch banking losing out to mobile banking: in June 2013, more than a third (36 per cent) of bank customers used a branch in an average four week period, compared to only 25 per cent using an app on a mobile phone or tablet (ie mobile banking).  By June 2017, mobile banking was used by 41.5 per cent (up 16.2 per cent points), well above the 26.5 per cent still using branches. That is, 3.5 million more people use their phones for banking than did four years ago.   On Roy Morgan's numbers, millennials have become the clear leaders in mobile banking,: nearly two-thirds (63 per cent) of millennials use mobile banking, compared to only 21.5 per cent using branches. Millennials now number 3.17 million users or 38 per cent of the total market. This is well above Generation X with two million, or 24.5 per cent of total mobile banking users. Branches still play an important role among older customers, with 45 per cent of pre-boomers and 32 per cent of baby boomers using them over an average four week period. These are the only two groups where branches appear to be preferred to mobile banking. The preference for mobile banking increases with household income, reaching a high of 59.5 per cent for those where household income is A$150,000 pa or over. This is in stark contrast to only 19.9 per cent where household incomes are under $40,000 pa.