Consumers Price Index

CPI is the quarterly measure of the changes to the prices of consumer items purchased by households, which gives a measure of inflation.

Consumers Price Index

Consumers Price Index - September Quarter 2022

The Consumers Price Index (CPI) is an indicator or measure of prices changes. It is a fixed weighted average of price relatives and is computed using the Laspeyres price index formula. The current weighting pattern is based on the 2005 Household Expenditure Survey (HES), which was carried out in  2005/06. The HES information was used to select the 'basket', which is the commonly used term for the goods and services prices for the purpose of compiling the CPI.


Quarterly change

In the September 2022 quarter compared with June 2022 quarter, the All Group Consumer Price Index (CPI) increased by 5.0 percent and the Underlying CPI increased by 3.9 percent.

  • Housing Utilities group rose by 11.3%. driven predominantly by higher prices in the Electricity rate of 18% (due to the cost to supply electricity i.e diesel and oil) and maintenance & repair of dwelling subgroup of 4.3% (affected by higher prices of building materials i.e timber, plywood, pipes and paints)

  • Clothing and Footwear group increased by 6.7%

  • Food Group rose by 6.1% subjective to higher prices in the meat 9%, food products, bread & cereals, fish and seafood, oils & fats subgroups of 8%

  • Household contents and household maintenance group also increased by 4.6%, Restaurants & Hotels by 4.4%, Transport Group increased by 3.2% and other minor increases were from the Education Group 0.8%, Miscellaneous 0.7%, Recreation & Culture 0.6%

  • All these increases were offset by lower prices from the Communications group by 0.1%.

CPI Graph101 new


Annual change

From the September 2021 quarter to the September  2022  quarter, the Consumer Price Index (CPI) rose by 15.3 percent with the Underlying CPI of 11.8 percent.

  • Food prices rose by 21.5 percent, influenced by rise in nearly everything in the food subgroups.

  • Transport increased by 24.2 percent. The largest upward contribution came from the passenger transport services, fuels and lubricants, parts and accessories for transport equipment's
  • Alcohol & Tobacco rose by 3.5 percent 

 CPI GraphAnnual

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Information about CPI

The Consumer Price Index covers price changes of the basket of goods and services consumed by all households on Rarotonga (the main island).

The base year is 2019. Prices are collected for 199 items and from selected outlets around Rarotonga. Individual prices are combined using weights from the Household Income and Expenditure Survey (HIES) conducted in 2015/2016. The HIES information was used to select the basket of goods and services.

The inclusion of an underlying measure is a recent improvement and it is published at the same time as the CPI. The underlying measure excludes items of a highly volatile nature, items that are subject to policy changes.

It excludes some items fruits, vegetables, meat and fish, electricity rates, purchases of new and used motor vehicles, petrol and diesel, international airfares and domestic airfares.

The CPI is calculated as chain-linked Jevons indices (change in the geometric average price). At the higher level, indices will be calculated with standard Laspeyres-type aggregation.


xlsxCPI_Tables_202203.xlsx 133.99 KB

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