The statement will give the first full forecasts since the Iran war oil shock.
The RBNZ has been grappling with what the Iran war might mean for the economy.
The Reserve Bank is expected to hold official cash rate steady at 2.25 percent
OPINION: Inflation has exceeded the top of the bank's target band since September.
The statement will include the first full forecasts since the March oil shock.
Three internal RBNZ members backed the hold, while three externals wanted a hike.