India introduces PPI for goods and services, begins shift from WPI

The Office of the Economic Adviser (OEA) under the Department for Promotion of Industry and Internal Trade (DPIIT), Ministry of Commerce and Industry, releas...

What Happened

The Office of the Economic Adviser (OEA) under the Department for Promotion of Industry and Internal Trade (DPIIT), Ministry of Commerce and Industry, released India's first Producer Price Index (PPI) on June 15, 2026.
Three new indices were launched simultaneously: Output PPI (prices received by domestic producers), Trial Input PPI (experimental, covers manufacturing sector), and Service PPI (covers seven service sectors).
The Service PPI covers banking, securities transactions, insurance, management of pension funds, railways, air passenger transport, and telecom — released on a quarterly schedule.
Simultaneously, a revamped Wholesale Price Index (WPI) series was released with an updated base year of 2022-23, replacing the earlier 2011-12 base year series.
The new WPI series expanded commodity coverage from 697 to 957 items, adding renewable energy sources (solar, wind, nuclear electricity) and reclassifying crude petroleum and natural gas from Primary Articles to the Fuel and Power category.
WPI and PPI will run in parallel for approximately five years before WPI is phased out entirely — allowing adequate time for industries, contracts, and price escalation clauses to transition.

Static Topic Bridges

Producer Price Index (PPI) — Concept and Methodology

A Producer Price Index measures average changes in prices received by domestic producers for their output, or the prices they pay for their inputs, at the point of first commercial transaction. It is distinct from a Consumer Price Index (CPI), which measures prices from the buyer's perspective at the retail level.

Output PPI: Tracks prices received by producers — closer to the "factory gate" or "farm gate" price.
Input PPI: Tracks prices paid by producers for raw materials and intermediate goods; measures cost-push pressures before they pass downstream.
Service PPI: Extends price measurement to service industries — a significant departure, as WPI tracked only goods.
Together, Output and Input PPIs enable "double deflation" — a methodology used to estimate Real GDP more accurately by deflating outputs and inputs separately.
The IMF's Producer Price Index Manual (2004, updated 2022) recommends PPI as the international best practice for measuring producer-level price changes.
Most G20 economies — including the United States, United Kingdom, Germany, Japan, and China — use PPI rather than WPI.

Connection to this news: India's launch of the PPI is a direct alignment with IMF recommendations and G20 statistical norms, filling a long-standing gap in India's price measurement architecture.

Wholesale Price Index (WPI) — Structure and Limitations

The WPI measures changes in the prices of goods at the wholesale (bulk trading) level, before they reach the final consumer. It was India's primary producer-price proxy for decades.

Administering body: Office of the Economic Adviser (OEA), DPIIT, Ministry of Commerce and Industry.
Previous base year: 2011-12 (in use until June 2026).
New base year: 2022-23 (released June 15, 2026, with back-data from April 2023 to April 2026).
Component weights (new series): Primary Articles — 22.76%; Fuel and Power — 14.11%; Manufactured Products — 63.13%.
Coverage: 957 items (up from 697 in the old series).
Key limitation: WPI covered only goods, excluded services, and used Gross Value of Output weights at a broader level — making it less aligned with National Accounts framework than PPI.
WPI has been widely used in industrial contracts and price escalation clauses, which is why the five-year parallel-run transition period was designed.

Connection to this news: The revamped WPI is the interim bridge — more accurate than the old series, but to be eventually replaced by PPI, which covers both goods and services.

Base Year Revision in Price Indices

Periodic revision of base years in price indices is a standard statistical practice to ensure the index basket reflects the current structure of the economy.

A base year is the reference year against which price changes are measured (index value = 100 in the base year).
The IMF recommends updating base years at least every five years.
India's WPI base year revisions: 1952-53 → 1961-62 → 1970-71 → 1981-82 → 1993-94 → 2004-05 → 2011-12 → 2022-23 (current).
Changing the base year changes both the index weights (reflecting structural shifts in the economy) and the commodity basket (adding new goods/services, dropping obsolete ones).
Base year changes can cause apparent jumps or drops in inflation readings even without underlying price changes, because the weighting structure shifts.

Connection to this news: The shift to 2022-23 base year captures India's post-COVID economic structure, includes renewable energy, and provides a more accurate picture of contemporary price dynamics.

National Accounts and Double Deflation

Double deflation is the methodology of deflating both gross output and intermediate inputs separately to derive real value added. It requires separate price indices for outputs and inputs.

India's current GDP estimation uses single deflation (only output prices), which can introduce errors when input prices move differently from output prices.
With Output PPI and Input PPI now available, India's Central Statistics Office (now NSO under MoSPI) can move toward double deflation — improving the accuracy of Real GDP estimates.
Most advanced economies — and the UN System of National Accounts (SNA 2008) — recommend double deflation as best practice.

Connection to this news: The PPI framework directly enables India to adopt double deflation for GDP estimation, a long-standing methodological upgrade recommended by international statistical bodies.

Key Facts & Data

Releasing authority: Office of the Economic Adviser (OEA), DPIIT, Ministry of Commerce and Industry.
Date of first PPI release: June 15, 2026.
Three new indices launched: Output PPI, Trial Input PPI (manufacturing, experimental), Service PPI.
Service PPI initial coverage: 7 sectors — banking, securities transactions, insurance, pension fund management, railways, air passenger transport, telecom.
New WPI base year: 2022-23 (replaces 2011-12).
New WPI commodity coverage: 957 items (up from 697).
New additions to WPI basket: Solar, wind, nuclear electricity; reclassification of crude petroleum and natural gas to Fuel and Power.
WPI component weights: Primary Articles 22.76% | Fuel and Power 14.11% | Manufactured Products 63.13%.
Transition period: WPI and PPI to run in parallel for ~5 years before WPI is discontinued.
International alignment: PPI is used by most G20 nations; recommended by IMF.
Key methodological advantage of PPI over WPI: Enables double deflation for Real GDP estimation; covers services; uses more granular Supply Table weights from National Accounts.