India revamps its Wholesale Price Index to base 2022-23 and launches a Producer Price Index

The new WPI series widens coverage to 957 items and adds renewable energy, while India begins its long-planned shift to a Producer Price Index — aligning with IMF and global best practice before WPI is phased out in five years.

What happened

• The Office of the Economic Adviser, DPIIT, released a revised Wholesale Price Index (WPI) with base year 2022-23, replacing the existing series with base year 2011-12.
• For the first time it also released new Producer Price Indices (PPI) with the same base year — an Output PPI (OPPI), a trial Input PPI (IPPI) (manufacturing only, experimental from March 2026) and a Service PPI covering seven services: banking, securities transactions, insurance, pension-fund management, railways, air (passenger) and telecom.
• The new WPI raises the basket from 697 to 957 items and, notably, brings new and renewable energy under electricity — better reflecting today's economy.
• Because WPI is widely used in price-escalation clauses, it will be released alongside PPI for five years and then discontinued, giving users time to switch from WPI to PPI.
• The transition from WPI to PPI aligns with global best practice in advanced economies and IMF recommendations; WPI and Output PPI are released monthly (from May 2026), Service PPI quarterly.

For Prelims

• WPI vs CPI: The Wholesale Price Index (WPI) tracks prices at the wholesale/producer level (no services); the Consumer Price Index (CPI) tracks retail prices (incl. services) and is the RBI's headline inflation anchor (4% +/- 2%). WPI is compiled by the Office of the Economic Adviser, DPIIT; CPI by NSO/MoSPI.
• Producer Price Index (PPI): Measures the average change in selling prices received by domestic producers for their output (and input costs). Most advanced economies use PPI rather than WPI; India is now transitioning to PPI.
• Output vs Input PPI: Output PPI tracks prices of goods/services produced; Input PPI tracks prices of inputs used — together they show how input-cost inflation is passed through to output prices.
• Base-year revision: Updating the base year (2011-12 -> 2022-23) refreshes the item basket and weights to reflect the current structure of the economy — improving accuracy of inflation measurement.
• Why PPI matters: PPI captures services (a large share of GDP) that WPI omits, and aligns India with IMF/international statistical standards — a long-pending reform (recommended by earlier working groups).
• Price-escalation clauses: Contracts (e.g. construction) often index payments to WPI; the 5-year parallel run lets such users migrate to PPI smoothly.
• Don't confuse: WPI/PPI (wholesale/producer prices) are distinct from CPI (retail); the RBI targets CPI inflation, not WPI. The new PPI does not, by itself, change the inflation-targeting framework.

For Mains

Syllabus: GS3.1 · GS3.3 · Linkage L2