The Australian lender reported cash earnings of A$2.64 billion for the six months to 31 March, below the A$3 billion average analyst forecast.
Strong loan growth was not enough to offset higher software costs and increased credit provisions in the half-year results released on Monday.
The miss points to pressure on bank profitability as economic conditions weaken, forcing lenders to absorb rising expenses while setting aside more for potential bad loans.
Beyond interest rates, what specific financial distress risks does NAB foresee for its Australian customers this year?
How did NAB grow its loan book so aggressively when competitive pressures were crushing industry-wide profit margins?
Is NAB's billion-dollar software write-down a strategic reset for growth or a sign of deeper technological problems?