The Reserve Bank's assistant governor, Juliet Tainui-Hernandez, told a parliamentary committee earlier that the central bank had "absolutely not" lost so many senior staff.
Governor Adrian Orr didn't deny suggestions he would have preferred the news of more departures to have been delayed until after his appearance before a parliamentary committee.
A restructuring of the senior leadership team is the explanation given for the latest rash of departures.
Kiwibank said it wouldn't charge customers transaction fees if they also had a home loan with it. But it did, taking fees from about 35,000 people.