The bank, formerly the Public Service Investment Society, will pay a total of $2.1 million in rebates to customers thanks to an annual profit before tax of $15.8 million - an increase of 17 per cent on last year.
The $2.1 million rebate, to be paid over the coming month, is an increase of 18 per cent on last year.
Chief executive Bruce McLachlan said it was a "stand-out" result in the market and was driven by good balance sheet growth, sound margin and credit management and continued growth in customer numbers.
"Our rebate isn't the only thing that sets us apart from other banks," he said.
"Our mobile app continues to be rated number one in New Zealand by customers, our new internet banking site has been awarded a 2016 Honoree Webb Award in the financial services/banking category and Canstar have awarded us the Most Satisfied Customers Award for Banking for the third time.
"More and more Kiwis are discovering that our bank has a different vision of what a bank can be.
"We're the only bank in New Zealand to share our profits with its customers and that genuinely puts the customer and their needs at the very heart of everything we do."