New Zealand household living costs rose 3.0 percent in the year to September, according to figures released by Stats NZ on Friday. The average conceals a substantial gap between households: lower mortgage interest payments offered relief to some borrowers while electricity and fuel kept pushing other budgets higher.
The annual increase eased from 3.2 percent in the June quarter. That does not mean household bills fell. It means the measured cost of the average household's purchases increased more slowly than in the previous annual comparison.
Who faced the larger increase?
Stats NZ's household living-costs table records a 3.6 percent annual increase for the lowest-expenditure group, compared with 2.5 percent for the highest-expenditure group. Superannuitant households faced a 4.0 percent increase.
These are expenditure groups. They should not be read as identical to income groups, and they do not measure every household's personal experience. A household's mix of housing costs, transport and electricity use affects how closely its bills track the published average.
The release does not provide a separate inflation rate for Asian or Filipino households. Applying the national average to an entire migrant community would miss differences between renters, mortgage borrowers and people living on fixed incomes.
Mortgage relief has limits
Mortgage interest payments fell 10.3 percent over the year in the household index. That figure measures the change in interest payments; it does not mean mortgage interest rates themselves fell by 10.3 percent.
RNZ's coverage focuses on how that decline offset higher fuel prices in the overall result. Stats NZ reported petrol prices up 19.1 percent, electricity up 9.3 percent and local authority rates up 6.2 percent over the year.
A renter does not receive a direct reduction in mortgage interest payments. An owner still paying an older fixed rate may experience relief at a different time from someone whose loan has already repriced. Those differences help explain why the headline can feel distant from an individual household's weekly spending.
Why the CPI number is different
Consumer price inflation was 3.7 percent over the same annual period. The consumer price index and the household living-costs indexes answer related questions using different methods and spending weights.
One important distinction is housing. The household indexes include interest payments, while the CPI includes the cost of building new homes and excludes mortgage interest. With interest payments falling, the two measures can move differently without either being a mistake.
For households reviewing their budget, the categories behind the average are more useful than the headline alone. A lower national increase can coexist with a much higher power bill or a more expensive commute, particularly when mortgage relief is absent.
