Strengthening export dairy prices have underpinned an annual 4.1 per cent gain in producer output prices, which was dampened by increased imported fuel prices.
Earlier this week, Fonterra's last global dairy trade auction for the current season posted its fifth consecutive gain.
Statistics New Zealand business prices manager Sarah Williams said for the year to March quarter, producer output prices had increased 4.1 per cent while input prices increased 4.2 per cent.
"The prices paid by fuel manufacturers were up 43 per cent in the year, mainly due to higher crude oil prices," she said.
Otago Chamber of Commerce chief executive Dougal McGowan said the fuel prices were "hammered" during the period, creating more costs for the primary sector in general.