Macquarie has laid down a more ambitious vision to take on the major banks, declaring it wants to grow its business lending book and nab more deposits from wealth clients, advancing an assault on the big four that has claimed 5 per cent of the mortgage market and counting.

The same technology Macquarie built to compete for home loans will be deployed to small business lending, it revealed in a rare glimpse of its aggressive banking strategy on Tuesday. Macquarie Bank, wholly owned by the listed Macquarie Group, has no branches and has invested to create a full suite of new digital banking systems.