"Putting more money back in the pockets of customers will enable them to repay debt, or support the wider New Zealand economy as the country recovers from restrictions brought on by Covid-19."
No decision had been made on how long the rate would be available, but it would largely depend on market conditions.
"As always, we will be working hard to balance the needs to borrowers and savers in setting new deposit rates, although this is challenging in the current low-interest-rate environment," Kelleher said.
On May 11, ANZ slashed its one-year fixed rate to 2.99 per cent, following Kiwibank and ASB dropping below 3 per cent.
HSBC, TSB and Westpac have also dropped rates.