The Producer Price Index (PPI) measures changes in prices received by producers for goods and services. It tracks inflation at the production stage, before goods and services reach the final consumer.
In simple terms, PPI shows how prices are changing for producers, manufacturers and service providers. It is broader than the Wholesale Price Index (WPI) because it can cover both goods and services, while WPI mainly tracks wholesale-level prices of goods.
Meaning and Method
PPI measures price changes from the producer’s side. It captures the prices received by producers for their output or paid by producers for inputs.
There are generally three forms of PPI:
- Output PPI: prices received by producers for goods and services sold
- Input PPI: prices paid by producers for raw materials and intermediate inputs
- Services PPI: producer-level price changes in services such as transport, banking, insurance, telecom and other service sectors
This makes PPI more comprehensive than WPI because modern economies are not only goods-based. Services form a major part of GDP, and their exclusion from WPI makes WPI less representative.
Difference Between WPI and PPI
| Basis | WPI | PPI |
| Full form | Wholesale Price Index | Producer Price Index |
| Price level | Wholesale market | Producer level |
| Coverage | Mainly goods | Goods and services |
| Services included | No | Yes, in modern PPI systems |
| Focus | Price of traded goods at wholesale stage | Prices received/paid by producers |
| International practice | Less preferred now | More widely used globally |
WPI can miss important price pressures in services and production chains. PPI gives a better picture of cost and price movements at different stages of production.
India’s Move Towards PPI
India has traditionally used WPI to measure wholesale-level inflation. The current WPI series has 2011–12 as its base year and is released by the Office of the Economic Adviser under DPIIT.
India is now moving towards a Producer Price Index framework. In June 2026, reports noted that India is set to introduce PPI along with a revised WPI series using 2022–23 as the base year. The transition from WPI to PPI is expected to happen gradually over around five years.
The new PPI framework is expected to include:
- output PPI
- input PPI
- services PPI
The services PPI is expected to initially be released quarterly and cover sectors such as banking, insurance, railways and telecom.
Importance
PPI is important because it captures inflationary pressure before it reaches consumers. If input prices, factory-gate prices or service-production costs rise, they may later feed into retail inflation.
It is useful for:
- understanding producer-level inflation
- tracking supply-side cost pressure
- analysing manufacturing and services inflation
- improving inflation forecasting
- supporting fiscal and monetary policy decisions
- aligning India’s inflation data with global statistical practices
For India, PPI is especially relevant because the economy has changed significantly since the older WPI framework. Services now form a large part of economic activity, and a goods-only inflation measure cannot fully capture producer-side inflation.
Limitations and Challenges
Introducing PPI is statistically more difficult than WPI because it requires reliable producer-level data across goods and services.
Major challenges include:
- collecting service-sector price data
- avoiding double counting across production stages
- ensuring regular reporting by firms
- creating sector-wise weights
- linking the new series with older WPI data
- maintaining comparability during the transition period
PPI will not replace CPI for measuring household inflation. CPI will continue to be more relevant for cost of living and RBI’s inflation targeting. PPI will mainly strengthen the understanding of producer-side and supply-chain inflation.
Conclusion
The Producer Price Index is a broader and more modern measure of producer-level inflation than WPI. It captures price changes at the production stage and can include both goods and services.
India’s move towards PPI marks an important reform in inflation measurement. It will help policymakers understand supply-side price pressures more accurately, while CPI will continue to remain the main index for consumer inflation and monetary policy targeting.
