The annual cost of living for the average household increased 5.2% in the December 2021 quarter, year-on-year, Statistics New Zealand says.
For seven of the 13 housing groups Statistics NZ has been measuring since the data series began in 2008, the December quarter saw the highest increase since the series began.
The Household Living Costs Price Index (HLPI) measures how inflation affects various household groups, including beneficiaries, superannuants and high and low spending households.
The 5.2% average household increase sat between increases of 4.8% for beneficiary households, and 5.4% for high-spending households. Māori households experienced an annual living-cost increase of 5.3%.
High spending households broke their long run of lower increases, said Katrina Dewbery, consumer prices manager at Statistics NZ.
The HLPI, which reports on households, is a separate measure from the Consumer Price Index (CPI) which measures the effect of inflation as a whole and was up 5.9% in the December 2021 quarter.
The two measures also treat housing differently: the CPI captures the cost of building a new home while the HLPI captures mortgage interest payments.
"In the HLPIs, interest payments increased 7.8% for the average household in the year to December 2021."
"In the CPI, the cost of building a new home increased 16% in the year to December 2021," said Statistics NZ.
Households appear to be still adjusting to the to rude awakening from a long-term climate of low interest rates that had reigned since the aftermath of the Global Financial Crisis (GFC).
“Highest-spending households spend 7.3% of their expenditure on interest payments, compared with 4.6% for the average household. This means the highest-spending households experience the price increase more than others,” said Dewbery.
Aside from increased mortgage or rent payments, other factors weighing heavily on household cost of living were higher prices for petrol and second-hand cars.
Higher petrol prices contributed to quarterly inflation for all 13 household groups in the December 2021 quarter, but impacted middle-spending households the most.
The middle-spending household groups spend 5.2% of their expenditure on petrol, compared with 4.6% for the average household, said Statistics NZ.
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