Radical Changes Are Coming to the Inflation Calculation System from TurkStat!
Turkish Statistical Institute (TURKSTAT), Consumer Price Index (CPI) is preparing to make a significant update to the calculation system. These changes, From January 2026 will come into force and the entire European Union (AB) It will also be mandatory for member countries.
Updating Base Year: 2003 In its place 2025!
Most important change, Change of base year used in inflation calculation. currently used “2003=100” base year, In line with the decisions of the EU Commission “2025=100” will be updated as. this update, Fireplace 2026It will be valid from.
Weight Structure and New Expenditure Groups
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National Accounts Data Will Gain Priority: CPI weight structure, European Statistics Office (Eurostat) With the methodological transformation determined by, national accounts data is considered the primary source will move to the structure. Group level weights in the new series, will be obtained from household final consumption expenditure data..
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13 Main Expenditure Group: Number of index main expenditure groups 13will rise to. In this context:
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personal care, social protection, miscellaneous goods and services main spending group will split in two.
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Insurance and financial services with digital contents, will be included as separate categories in the inflation calculation.
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Unregistered Consumption Will Be Reflected: Tax, thanks to multi-source data sets such as production and sales statistics, unregistered consumption items will be included in total expenditures..
Headline Inflation Indicators Will Not Change
In the statement made by TÜİK, Information was also given about the effect of the base year transition on the inflation rate.:
“Monthly and annual change rates, will stay the same. inflation rate, will not change in any year or month. ‘2003=100’ headline inflation indicators for the base year period there will be no change, Differences may only be seen in some sub-indices due to classification changes.”
Base year transition, the level of the index 2025 will normalize according to the average index of the year, but will maintain rates of change.
New Indicators Will Be Published
Also in the new year, Additional indicators will be published simultaneously with inflation data.:
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Seasonally Adjusted CPI: Seasonally adjusted CPI indicators, It will start to be published on the same day as the main index..
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CPI with Fixed Tax Rates: This indicator, indirect taxes (VAT, SCT) assuming constant, only products and services changes in pure market prices will be a complementary indicator that measures.
