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Consumer Price Index
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Methodology Documents
Methodology Documents
Key Methodological Documents
Introduction of Updated Series (Base December 2023=100)
CSO Consumer Price Index Methodology
Comparison Between the CPI and the HICP
Frequently Asked Questions
How to Calculate a Percentage Change
Weights
Consumer Price Index Weights 2024 (XLS 74KB)
Annual updating of CPI and HICP weights (PDF 521KB)
Consumer Price Index (CPI) and Harmonised Index of Consumer Prices (HICP) expenditure weights by COICOP Division 2012 - 2016 (XLS 135KB)
Consumer Price Index Weights 2017 - 2023 (XLS 137KB)
Compliance, Monitoring and Quality
HICP Compliance Monitoring Report 2017 (PDF 276KB)
HICP Compliance Monitoring Report 2010 (PDF 46KB)
National Consumer Price Index Review Group Report March 2010 (PDF 124KB)
Special Topics
Methodology Update to House Insurance
Change in Methodology for International Package Holidays
Introduction of Water Supply and Sewage Collection (PDF 593KB)
Mortgage interest methodology (PDF 40KB)
The inclusion of Tobacco in the Irish Consumer Price Index Explanatory Note (PDF 33KB)
The Consumer Price Index HICP Re-referencing to 2015=100 (PDF 97KB)
Methodology change for Computers and Printers
CPI Technical Paper - Methodology Change for Clothing, Footwear and Travel Goods
Methodology Change for Motor Insurance
Historical CPI Methodological Documents
Package Holidays - The Seasonal Basket Approach (PDF 48KB)
Research and Analysis
CPI - The Scanner Data Project (PDF 527KB)
How does the Producer Price Index differ from the Consumer Price Index (PDF 45KB)
Research paper on the use of hedonic regression for new cars (PDF 305KB)
Notice of Change in Methodology for Clothing, Footwear and Travel Goods
CPI-Introduction of Updated Series (Base November 1968=100)
CPI-Introduction of Updated Series (Base November 1975=100)
CPI-Introduction of Updated Series (Base November 1982=100)
CPI-Introduction of Updated Series (Base November 1989=100)
CPI-Introduction of Updated Series (Base November 1996=100)
CPI Introduction of Updated Series (Base December 2001=100)
CPI Introduction of Updated Series (Base December 2006=100)
CPI - Introduction of Updated Series (Base December 2011=100) (PDF 306KB)
CPI - Introduction of Updated Series (Base December 2016=100) (PDF 1,524KB)
Other Historical Publications
Report on the Cost of Living in Ireland - June 1922 to October 1925 (PDF 17,898KB)
The Official Cost of Living Index Number and Its Critics 1951 (PDF 3,286KB)
Report of the Tribunal on Prices
