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%.

相比之下，WPI 的分布有所不同，其中制成品占比 63.12%，燃料和动力占比 14.11%，初级产品占比 22.76%。

服务业 PPI 也正在分阶段引入。第一阶段涵盖了关键领域，包括银行业、证券交易、保险业、养老基金管理、铁路、航空客运和电信服务。未来阶段将利用价格调查和 GSTN（商品和服务税网络）的数据，扩大范围以涵盖剩余的服务。

核心要点

• 五年逐步淘汰： 随着生产者价格指数 (PPI) 成为主要的衡量指标，批发价格指数 (WPI) 将在未来五年内逐步停止使用。
• 增强的颗粒度： 投入和产出 PPI 的引入，可以更好地追踪原材料成本如何影响最终的生产价格。
• 提高经济准确性： 此举遵循了 IMF 的建议，通过提供以生产者为中心的通胀视角，来提高国民经济核算和 GDP 编制的准确性。