ANZ said it made a cash profit of $928 million in New Zealand in the first half to March, up 24 per cent the same half a year earlier, driven mostly by big reductions in costs.
The bank, New Zealand's biggest, raised its statutory net profit by 14 per cent to $869m.
ANZ's New Zealand chief executive, David Hisco, said the performance was as a result of the business being focused on sustainable growth, increasing productivity and delivering digital innovation for customers.
"All our business units performed well in this half due to our continued simplification of the business," he said.
Net interest income increased 3 per cent compared with the March 2016 half, primarily reflecting continued lending growth, while net interest margins have contracted due to increased funding costs and demand for fixed rate home lending, Hisco said.