ANZ New Zealand is rejigging its structure and about 45 staff are expected to lose their jobs.
The country's largest bank plans to introduce a regional model - Southern, Central, Northern and Auckland - which will take responsibility for the bank's various operations.
Chief executive David Hisco says the aim is to bring its general managers closer to its customers so decisions can be made more quickly.
He says the job losses are less than half a percent of its 9000 employees.
A key aim is linking its farming and commercial arms and Mr Hisco says it recognises farming does not necessarily stop at the farmgate.
He says the changes means the Australian-owned bank will be ready to take advantage of the expected pick up in the economy later in the year.