The pair said they were attempting to park in the customer parking area on one side of the bank and intended to do some shopping at a nearby shop with the crash happened.
The embarrassed male driver said he had inadvertently hit the gas pedal instead of the brake when the Subaru crashed into the side of the bank building and window.
"It was an accident," he said.
"There was minor frontal damage to our car and we're both okay," he said.
Bank staff were busy dealing with the incident to talk.
Tauranga firefighters helped to clear some of the shattered glass and other debris.