Inflation pressures are showing signs of easing.
Producers input prices - which are a measure of wholesale inflation - rose for the eighth quarter in a row, climbing 0.6% in the six months to September.
But the increase is the smallest since the fourth quarter of 2009.
Output prices, a measure of what producers are paid for their products, rose 0.2%, the smallest increase this year.
BNZ economist Doug Steel says the data is yet more evidence inflationary pressures are cooling.
He says it reinforced what was already known from the third quarter Consumer Price Index, that inflation is cooling.
He says it's also a broader message because the producer prices cover the whole economy, not just the prices that relate to consumers.