Household living-costs price indexes (HLPIs)

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Household living-costs price indexes (HLPIs) provide new insights into the inflation experienced by 13 different household groups:

  • beneficiaries

  • Māori

  • income quintiles (five groups)

  • expenditure quintiles (five groups)

  • superannuitants.


Our decision to create the HLPIs was a response to the 2013 CPI Advisory Committee recommendations and associated submissions from public consultation in 2014. The committee, a customer group set up to advise on the consumers price index (CPI), reconfirmed the CPI’s principal use is to inform monetary policy-setting. It also acknowledged the CPI’s design is a compromise between this principal use and other uses, such as adjusting a range of public and private payments.

The CPI measures the change in prices of goods and services acquired by New Zealand-resident private households. It is an aggregate measure that represents the price change experienced on average by households. This makes it well suited for use as a national barometer of inflation.

The methods are aligned with the CPI’s principal use as a macroeconomic indicator for monetary policy purposes. Yet, hidden behind all averages is a distribution. The distribution of inflation means the CPI does not necessarily align well with inflation experienced by different demographic groups.

The committee recommended we provide extra indexes to reflect changes in the purchasing power of incomes for different demographic groups.

Citation Information


Household living-costs price indexes (HLPIs)


Household living-costs price index

Alternate Title



Statistics New Zealand


Inflation measures for household groups

Coverage Information

Temporal Coverage

  • 2008-06 to present

Topical Coverage

  • inflation
  • Income
  • expenditure
  • Household
  • Maori
  • Superannuitants
  • beneficiaries

Website Links

CPI Advisory Committee 2013


3) Quarterly

Significant events impacting this study series

2016 - First release of HLPI's on 6/10/2016

2017 - First review of HLPI's as part of the 2017 review of the CPI see (household living cost price index review: 2017). The 2017 review reselected the CPI basket and updated the relative importance of the basket item in each HLPI group. Note that we did not rebase the HLPI's at the same time as the CPI. This is because the current base period, June 2014, is more recent than the CPI's (June 2006).

2020 – Second review of the HLPI’s as part of the 2020 review of the CPI (see Household living-costs price indexes review: 2020. The 2020 review re-selected the CPI basket and updated the relative importance of the basket items in each HLPI group. We also ceased weighting the HLPI’s by store-type weight. Previously, customised household-group-specific store-type weights were calculated using expenditure by outlet information from the HES. Analysis of the HLPI series showed there was no discernible difference between the published HLPI series compared with the HLPIs calculated using the store-type weights used in the CPI.

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