India Updates CPI Inflation Series to Base Year 2024=100, Expanding Consumer Basket
The Ministry of Statistics and Programme Implementation (MoSPI) released the Consumer Price Index (CPI) with a revised base year of 2024=100, replacing the earlier 2012=100 series, effective February 12, 2026.
The revised series updates weights using the Household Consumption Expenditure Survey (HCES) 2023-24, the first comprehensive survey of household spending in over a decade.
The consumption basket was expanded from 299 to 358 weighted items at the all-India level: goods items rose from 259 to 308, and services items from 40 to 50, significantly strengthening the representation of the services sector.
The weight of Food & Beverages in the new CPI was revised down to 36.75% (combined) from 45.86% in the CPI 2012 structure, reflecting India's changing consumption patterns as households spend more on services, transport, and recreation.
Under the new series, India's CPI inflation for January 2026 stood at 2.75% (provisional), year-on-year.
Consumer Price Index (CPI): Structure and Methodology
The CPI measures the change in the average price level of a fixed basket of goods and services purchased by households over time. India's CPI is compiled by the National Statistical Office (NSO) under MoSPI, with separate indices for rural, urban, and combined populations. The index serves as the headline inflation measure targeted by the Reserve Bank of India (RBI) under the flexible inflation targeting (FIT) framework.
A revised base year and expanded basket make the CPI a more accurate policy tool — when weights reflect current spending patterns, the MPC's inflation readings and consequently its interest rate decisions (repo rate) are better calibrated to actual household experience.
Base Year Revision: Why It Matters for Policy
A base year is the reference period against which current prices are indexed. Over time, consumption patterns shift — households spend more on services, less on staple foods, adopt new products (OTT subscriptions, e-commerce). If the base year is outdated, the index overstates or understates true inflation, distorting policy responses.
The editorial views the base year revision positively — a lower food weight in CPI (from ~46% to ~37%) means that food price shocks (like vegetable price spikes) will have a somewhat smaller mechanical impact on headline inflation, potentially giving the MPC more room to hold or cut rates during supply-side food inflation episodes.
WPI vs CPI: Two Inflation Gauges
India maintains two key inflation indices: CPI (consumer prices, measuring retail inflation experienced by households) and WPI (Wholesale Price Index, measuring price changes at the producer/wholesale level, compiled by the Office of the Economic Adviser under the Ministry of Commerce and Industry, base year 2011-12).
The CPI base year revision widens the gap in analytical frameworks between WPI and CPI. The move reinforces CPI's primacy in monetary policy, while WPI remains useful for understanding input cost inflation in manufacturing.
- New CPI base year: 2024=100 (replaces 2012=100), released February 12, 2026
- Data source for weights: HCES 2023-24 (first HCES release since 2011-12)
- Basket expansion: 299 → 358 items; goods 259 → 308; services 40 → 50
- Food & Beverages weight: reduced from ~45.86% (CPI 2012) to 36.75% (CPI 2024)
- January 2026 CPI inflation (new series): 2.75% year-on-year (provisional)
- RBI inflation target: 4% CPI (±2% tolerance band) under flexible inflation targeting
- MPC constituted under: RBI Act, 1934 (amended 2016)
- CPI compiled by: National Statistical Office (NSO), under MoSPI
- Market coverage: 1,465 rural markets + 1,395 urban markets + 12 online markets