A hefty spend on a new brand identity chewed into the profit of Bank Australia over the last half year, though the marketing helped support a period of rapid business growth.Bank Australia reported a net profit of A$10.2 million for the six months to December 2015. This is 23 per cent less than the profit of $13.2 million recorded for the same period in 2014, but one the CEO Damien Walsh said is "on budget".bankmecu switched to the name Bank Australia only in the second half of 2015.New business is brimming, with "year to date loan funding of $437 million a rise of near 15 per cent over the year before, with loan growth of 11.2 per cent for the year to December 2015. Customer deposits grew by 7.6 per cent.Bank Australia put its capital adequacy at 19.3 per cent.