India Launches Producer Price Index; WPI to be Phased Out in Five Years
In a landmark shift for India's economic monitoring, the government has released its first-ever Producer Price Index (PPI) data for goods and services. This move initiates a five-year transition period to phase out the Wholesale Price Index (WPI), aligning India's inflation metrics with global standards and IMF recommendations.
A Strategic Shift from WPI to PPI
For decades, the Wholesale Price Index (WPI) has been the primary gauge for wholesale inflation in India. However, the Commerce and Industry Ministry is now transitioning to the PPI to provide a more granular view of price movements. Unlike the WPI, the PPI comprises multiple indicators, including Output PPI (Goods) and Services PPI, offering a more accurate reflection of price changes from the producer's perspective.
This transition follows recommendations from a working group led by former NITI Aayog member Ramesh Chand. The shift is expected to enhance the accuracy of National Accounts and GDP compilation by providing better estimations of real value addition in the economy.
Understanding Input vs. Output PPI
A significant feature of the new system is the distinction between input and output prices. The Ministry released both Output and Input PPIs to illustrate how inflation experienced by producers on raw materials (inputs) is passed through to the final products (outputs).
For the May 2026 period, the All-India Output PPI for all commodities stood at 109.6, up from 108.6 in April 2026. Concurrently, the All-India trial Input PPI for the manufacturing sector was recorded at 104.9. While the output PPI is a core metric, the input PPI is currently being published on an experimental basis to assess data quality and gather stakeholder feedback.
Composition and Sectoral Weights
The new index uses a revised base year of 2022-23 and covers 957 items. The weighting structure reveals a significant shift in how the economy is measured:
- Output PPI (Goods): Manufactured items hold the highest weight at 69.93%, followed by agriculture, forestry, and fishing (22.16%), electricity (4.49%), and mining and quarrying (3.42%).
- Service PPI: In its first phase, the service index covers critical sectors including banking, securities, insurance, pension fund management, railways, air passenger transport, and telecom. Further service expansion will utilize GSTN data in subsequent phases.
Comparing this to the WPI, the new structure places a higher emphasis on manufactured goods (69.93% vs 63.12% in WPI) and significantly reduces the weight of primary articles (22.16% vs 22.76% in WPI) while adjusting fuel and power metrics.
Inflation Trends in the Transition Phase
The release of PPI data coincided with a rise in wholesale inflation, which climbed to 9.68% in May from 8.26% in April. Mirroring this trend, the output PPI inflation also saw an uptick, rising to 9.4% from 8.1% during the same period. This dual tracking will allow policymakers to better understand the correlation between production costs and final wholesale prices.
Key Takeaways
- Five-Year Transition: The Wholesale Price Index (WPI) will be gradually phased out and discontinued over the next five years as the Producer Price Index (PPI) takes its place.
- Enhanced Accuracy: The PPI provides a dual view of Input and Output prices, allowing for a better understanding of how production costs impact final goods and services.
- Global Alignment: This move aligns India with advanced economies and IMF recommendations, improving the reliability of GDP and National Account compilations.