TSB Bank made a profit of $43 million for the year to the end of March.
The result is 9.2% ahead of what it made last year.
TSB says the profit represents its 22nd year of profit growth.
Funds on deposit increased by almost $600 million to $3.5 billion, while its loan book topped $2.1 billion.
The bank says its Capital Adequacy Ratio of 16.9% is well above the international standard of 8% and is the highest of all New Zealand banks.