India Launches Producer Price Index: WPI to be Phased Out in Five Years

India has officially entered a new era of inflation tracking with the maiden release of the Producer Price Index (PPI) for goods and services. This strategic shift marks the beginning of a five-year transition period to phase out the long-standing Wholesale Price Index (WPI) in favor of a more comprehensive global standard.

A Strategic Transition to Global Standards

The decision to move from WPI to PPI aligns India with the practices of advanced economies and follows specific recommendations from the International Monetary Fund (IMF). By transitioning to the PPI, India aims to gain a more sophisticated understanding of price movements. Unlike the WPI, the new framework provides both Output and Input PPIs, allowing policymakers to track how cost increases in raw materials (inputs) are passed through to the final products (outputs) sold by producers.

This overhaul follows a report by a working group led by former NITI Aayog member Ramesh Chand, which suggested that the PPI offers a more accurate measure of price changes from the producer's perspective. This accuracy is vital for the more precise compilation of National Accounts and GDP estimations.

Decoding the First Set of PPI Data

The Commerce and Industry Ministry released the initial data alongside the May wholesale inflation figures. The All-India Output PPI for all commodities stood at 109.6 in May 2026, an increase from 108.6 in April 2026. Reflecting broader inflationary trends, output PPI inflation rose to 9.4% in May, up from 8.1% in April.

To ensure data integrity, the ministry is also publishing the All-India trial Input PPI for the manufacturing sector on an experimental basis. The trial Input PPI for manufacturing was recorded at 104.9 for May 2026. This experimental phase is designed to gather stakeholder feedback and assess data quality before a full-scale rollout.

Structural Differences and Sectoral Weightage

The new PPI framework utilizes a revised base year of 2022-23, covering 957 items. There are significant differences in how the indices are weighted compared to the old WPI system. In the Output PPI (Goods), manufactured items carry a heavy weight of 69.93%, followed by agriculture, forestry, and fishing at 22.16%, electricity at 4.49%, and mining and quarrying at 3.42%.

In contrast, the WPI distribution was different, with manufactured products at 63.12%, fuel and power at 14.11%, and primary articles at 22.76%.

The Service PPI is also being introduced in phases. The first phase covers critical sectors including banking, securities transactions, insurance, pension fund management, railways, air passenger transport, and telecom services. Future phases will expand to cover the remaining services using data from price surveys and the GSTN (Goods and Services Tax Network).

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