Source: TH
Context:
The Government of India has decided to phase out the Wholesale Price Index (WPI) over the next five years and gradually replace it with a more comprehensive Producer Price Index (PPI). From 15 June 2026, the Department for Promotion of Industry and Internal Trade (DPIIT) under the Ministry of Commerce and Industry will release: (a) a revised WPI series with the new base year 2022-23 (replacing the current 2011-12 base year); and (b) a new PPI series with three sub-indices: Output PPI, Trial Input PPI, and Services PPI. The Services PPI will, in its first phase, cover seven service sectors: banking, securities transactions, insurance, management of pension funds, railways, air passenger transport, and telecom.
Existing price indices in India:
| Index | Released by | Measures |
|---|---|---|
| Wholesale Price Index (WPI) | DPIIT (Ministry of Commerce and Industry) | Wholesale-level goods prices |
| Consumer Price Index (CPI), Combined | National Statistical Office (NSO), MoSPI | Retail prices for households; used by RBI MPC as the target inflation index |
| CPI – Industrial Workers (CPI-IW) | Labour Bureau, Ministry of Labour and Employment | Used for DA calculations for government employees |
| Producer Price Index (PPI) (new) | DPIIT | Output, input, and services prices at the producer’s gate |
Wholesale Price Index (WPI)
The WPI measures the average change in prices of goods bought and sold in bulk at the wholesale level, before they reach the retail consumer. It is the oldest price index in India.
| Indicator | Detail |
|---|---|
| Released by | Office of the Economic Adviser, DPIIT, Ministry of Commerce and Industry |
| Current base year | 2011-12 (to be revised to 2022-23) |
| Frequency | Monthly, released around the 14th of every month |
| Coverage | Goods only, no services |
| Total items | 697 items in the existing series |
Three major groups of WPI:
| Group | Weight (existing 2011-12 series) |
|---|---|
| Primary Articles | 22.62 per cent (food articles, non-food articles, minerals, crude petroleum) |
| Fuel and Power | 13.15 per cent |
| Manufactured Products | 64.23 per cent (the largest group) |
Limitations of WPI:
(a) No services coverage, even though services contribute over 50 per cent of GDP. (b) Reflects bulk wholesale prices, not producer-level prices. (c) Does not directly capture consumer-experienced inflation. (d) Cannot fully analyse input-output price pass-through.
Producer Price Index (PPI)
The PPI measures the average change in prices received by domestic producers for their goods and services, at the producer’s gate, before any trade margins, transport costs, or taxes are added.
India’s new PPI (effective 15 June 2026) will have three sub-indices:
| Sub-Index | Measures |
|---|---|
| Output PPI | Prices of goods produced and sold by producers |
| Trial Input PPI | Prices of inputs used by producers |
| Services PPI | Prices of services, starting with 7 sectors in Phase 1 |
The 7 services in the first phase of Services PPI:
(a) Banking. (b) Securities Transaction. (c) Insurance. (d) Management of Pension Funds. (e) Railways. (f) Air (Passenger) Transport. (g) Telecom.
Why the World Uses PPI:
(a) Captures producer-level price pressures, more accurate than wholesale. (b) Includes services, reflecting modern economies. (c) Allows clear input-output pass-through analysis. (d) Aligned with IMF Price Statistics Manuals. (e) Used by US, UK, EU, Japan, China, and most major economies.
WPI vs PPI, Head-to-Head Comparison
| Parameter | Wholesale Price Index (WPI) | Producer Price Index (PPI) |
|---|---|---|
| Stage of measurement | Wholesale (bulk trading) level | Producer’s gate, before distribution margins |
| Coverage | Goods only | Goods + Services |
| Released by | DPIIT, Ministry of Commerce and Industry | DPIIT, Ministry of Commerce and Industry |
| Frequency | Monthly | Monthly for Output PPI, plus periodic Services and Input PPI |
| Number of items | 697 (current series) | Wider, with services added |
| Use in monetary policy | Not the RBI’s inflation target | Not the RBI’s inflation target |
| Use in contracts | Widely used in price escalation clauses | Expected to gradually replace WPI |
| Reflects services? | No | Yes |
| Input-output analysis | Limited | Clear and structured |
| Aligned with global practice | Outdated; only a few countries use WPI | Standard global indicator |
Where Each Fits in India’s Price-Index Ecosystem
| Index | Released by | What It Measures | Used For |
|---|---|---|---|
| WPI | DPIIT, Ministry of Commerce and Industry | Wholesale-level goods prices | Price escalation clauses, industrial inflation analysis |
| PPI (new) | DPIIT, Ministry of Commerce and Industry | Producer-level goods and services prices | To replace WPI over five years |
| CPI (Combined, Rural, Urban) | National Statistical Office (NSO), MoSPI | Retail prices of household consumption basket | RBI MPC’s inflation target (4 per cent +/- 2 per cent) |
| CPI-IW (Industrial Workers) | Labour Bureau, Ministry of Labour and Employment | Retail prices for industrial workers | DA computation for government employees |
| CPI-AL/RL | Labour Bureau | Retail prices for agricultural and rural labourers | Wage and welfare indexation |
Key Differences Between PPI and Consumer Price Index (CPI)
| Parameter | PPI | CPI |
|---|---|---|
| Stage | Producer’s gate | Household / retail point of purchase |
| Measures | Prices received by producers | Prices paid by consumers |
| Coverage | Goods + services (producer side) | Goods + services in household basket |
| Use | Industrial inflation, contract pricing, GDP deflators | Inflation targeting, cost of living, DA, welfare indexation |
| Includes taxes? | Generally excludes indirect taxes on output | Includes indirect taxes in final consumer price |
Practice MCQs
Q1. With reference to the Wholesale Price Index (WPI) and the Producer Price Index (PPI) in India, consider the following statements:
- WPI measures the average change in prices of goods bought and sold in bulk at the wholesale level.
- PPI measures the average change in prices received by domestic producers at the point of production.
- WPI in India does not cover services, while the new PPI includes a Services PPI starting with 7 sectors in Phase 1.
- Both WPI and PPI in India are released by the National Statistical Office (NSO).
Which of the above are correct? (a) 1, 2 and 3 only (b) 1, 3 and 4 only (c) 2 and 4 only (d) 1 and 4 only (e) All four (Statement 4 is wrong; WPI and PPI are released by the DPIIT under the Ministry of Commerce and Industry, NOT the NSO. The NSO releases CPI (Combined, Rural, Urban).)
Q2. Consider the following statements about the new PPI series being launched in India:
- The new PPI series will be launched from 15 June 2026.
- It will have three sub-indices: Output PPI, Trial Input PPI, and Services PPI.
- The Services PPI in Phase 1 will cover banking, securities transactions, insurance, pension fund management, railways, air passenger transport, and telecom.
- The transition from WPI to PPI aligns with IMF recommendations and global best practices.
How many of the above statements are correct? (a) Only one (b) Only two (c) Only three (d) All four (e) None
Q3. With reference to the architecture of price indices in India, consider the following statements:
- The Consumer Price Index (Combined, Rural and Urban) is released by the National Statistical Office under the Ministry of Statistics and Programme Implementation.
- The Consumer Price Index for Industrial Workers (CPI-IW) is released by the Labour Bureau under the Ministry of Labour and Employment.
- The RBI’s Monetary Policy Committee targets the Consumer Price Index (Combined) inflation at 4 per cent, with a tolerance band of +/- 2 percentage points.
- The Wholesale Price Index (WPI) is the official inflation target for the RBI under India’s monetary policy framework.
Which of the above are correct? (a) 1, 2 and 3 only (b) 1, 3 and 4 only (c) 2 and 4 only (d) 1 and 4 only (e) All four (Statement 4 is wrong; the RBI’s official inflation target is the CPI (Combined), NOT the WPI.)
Q4. Consider the following statements about WPI and PPI features:
- WPI covers only goods and does not include services.
- PPI explicitly includes both goods (Output and Input) and services.
- PPI is generally compiled at the producer’s gate, before trade margins and indirect taxes are added.
- CPI captures prices at the retail consumer level, including taxes and trade margins.
How many of the above statements are correct? (a) Only one (b) Only two (c) Only three (d) All four (e) None
Answer Key
- (a), Statements 1, 2, 3 are correct; Statement 4 is wrong because WPI and PPI are released by DPIIT, not the NSO.
- (d), All four statements are correct.
- (a), Statements 1, 2, 3 are correct; Statement 4 is wrong because the RBI’s inflation target is CPI (Combined), not WPI.
- (d), All four statements are correct.
Exam Relevance
| Exam | Relevance |
|---|---|
| UPSC Prelims | GS Paper III on Indian Economy (Inflation indices, WPI, PPI, CPI) |
| UPSC Mains | GS Paper III on Indian Economy, Inflation, Monetary policy, Statistical reforms |
| Banking (RBI Gr B, SBI PO, IBPS, NABARD) | Very high importance, inflation, monetary policy, statistics |
| SEBI Grade A, IRDAI Grade A | Macroeconomic awareness |
| Indian Statistical Service (ISS) | Core area on price indices |
| SSC, Insurance, Railway | Static and Current GK on WPI, CPI, PPI, base years |
