Changes to India's Consumer Price Index

Inflation Data Update and Economic Indicators:

1. New Consumer Price Index (CPI) Adjustments:

   • Base Year: The headline inflation data will now utilize 2024 as the base year.
   • Weight Adjustments:
     • Weight of food and beverage items in CPI reduced from 45.86% to 36.75%.
     • Housing's weight significantly increased from 10.07% to 17.66%.
     • Total items in CPI basket expanded from 299 to 358.

2. Impact on Inflation:

   • The adjustment in weights aims to reduce volatility in headline inflation rates.
   • An expected outcome is higher overall retail inflation due to the increased emphasis on housing within the CPI.
   • Historical low food inflation recorded at -5.02% as of October 2025.

3. Economic Theory Reference:

   • Established by Ernst Engel, the theory suggests that as household incomes rise, the proportion spent on food decreases, which is reflected in the recent Household Consumption Expenditure Survey (HCES).
   • Survey Findings: Rural households now spend 47.04% of their Monthly Per Capita Consumption Expenditure (MPCE) on food (down from 52.9% in 2011-12); urban households’ food expenditure dropped from 42.62% to 39.68%.

4. RBI Monetary Policy:

   • The Reserve Bank of India (RBI) has a mandate to target CPI inflation at 4%, with flexibility within a band of ±2%.
   • The current inflation targeting framework (Flexible Inflation Targeting - FIT) is set for review, with potential adjustments expected by March.

5. Methodological Changes:

   • New methodologies to measure housing inflation will exclude employer-provided accommodation, thereby impacting housing inflation calculations.
   • Rents have shown an upward trend: 0.56% for rural India (up from 0.45%) and 6.58% for urban India (up from 6.24%).

6. Statistical Calculations:

   • Experts estimate a marginal increase of 20-30 basis points in overall CPI due to the new basket weights.

7. Upcoming Releases:

   • The first inflation print under the new series will be released on February 12, 2026, reflecting January data.
   • An expert group report recommends providing a linking factor to establish comparability between old and new CPI series.

Implications:

• These changes in the CPI are crucial for fiscal policy and economic planning, impacting everything from monetary policy decisions by the RBI to household budgeting and consumption patterns.
• Ongoing discussions surrounding food inflation targeting signal a need for adaptive economic strategies in response to changing consumption habits and price volatility.

Conclusion:

The adjustments to the CPI reflect a significant shift in focus towards housing costs while reducing the influence of food inflation. These shifts can lead to both immediate impacts on inflation calculations and longer-term strategies in monetary policy as India seeks to stabilize its economic landscape amidst evolving consumer behaviors.