Inflation for households with higher spending rose the least, up 0.5 per cent, with the biggest impact coming from an increase in petrol prices. The fall in international airfares and mortgage interest rates in the quarter dampened the overall inflation rise of high-spending households.
Meanwhile, inflation for the lowest-expenditure household group, and for Maori households, rose 1.3 per cent in the quarter. Inflation for superannuitants rose 0.9 per cent, matching the overall rate for households.
On an annual basis, living costs for low-spending households faced the highest inflation rate of 2.3 per cent due to hikes for petrol and rent. That's the highest level of inflation for this group since the June 2014 quarter, Stats NZ said.
Annual inflation for Maori households rose 2.1 per cent, impacted by higher prices for petrol, cigarettes and tobacco, and housing rentals, the agency said.
High-spending households experienced a lower rate of annual inflation at 1.6 per cent as increases in petrol and cigarettes and tobacco prices had a smaller impact on this group's overall inflation compared with other groups. Meanwhile, prices decreased for package holidays and international air fares, for which high-spending households have more discretionary spending, the agency said.