WPI Inflation Nears 10% in June: New 2022-23 Base Series, PPI and Food Prices Explained

Definition and coverage: The WPI measures the average change in the prices of goods traded in bulk at the wholesale level — the first point of sale before goods reach retail consumers. It covers only goods, not services, and therefore captures supply-side or producer-level price pressures rather than the inflation actually experienced by households.

Compiling agency: The index is compiled and released monthly by the Office of the Economic Adviser, Department for Promotion of Industry and Internal Trade (DPIIT), Ministry of Commerce and Industry — not by the Ministry of Statistics, which compiles the CPI.

Structure of the index: The WPI has three major groups — Primary Articles (food articles, non-food articles, minerals), Fuel and Power, and Manufactured Products, which carries the highest weight (63.1 per cent in the new series). A separate WPI Food Index (weight 24.99 per cent) combines food articles from primary articles with manufactured food products to track overall wholesale food inflation.

Base year revisions: The WPI base year has been revised periodically to reflect the changing structure of the economy — 1952-53, 1961-62, 1970-71, 1981-82, 1993-94, 2004-05, 2011-12 and now 2022-23. Each revision updates the commodity basket, the weights and the methodology.

A larger, modern basket: The number of items in the basket has been expanded from 697 to 957, capturing new products and sectors that emerged after 2011-12. Reflecting India's energy transition, solar and wind energy, along with nuclear electricity, have been added under the Electricity group.

Reorganised energy tracking: Crude petroleum and natural gas have been shifted from Primary Articles to the Fuel and Power group, consolidating all major fuels — coal, electricity, petroleum products, crude and gas — in one group for coherent tracking. This is one reason the fuel and power group now shows such large swings.

Improved methodology: Weights in the new series are derived using the Gross Value of Output (GVO) from national accounts, replacing the earlier net-traded-value approach, along with improved computation and better methods for imputing missing price data. The methodology was vetted by the Technical Advisory Committee on Statistics of Prices and Cost of Living, and the revision was approved in May 2026 and released on 15 June 2026, with a back series from April 2023.

A sunset clause for the WPI: Significantly, the government has decided to phase out the WPI altogether. Because the WPI is widely used in price escalation clauses of contracts, it will continue to be published in parallel for five years from the release of the new series, and will be discontinued thereafter — with the Producer Price Index becoming India's primary measure of producer-side inflation.

The concept: The Producer Price Index (PPI) measures the average change in prices that domestic producers receive for their output, and pay for their inputs, at the factory gate. It captures inflation from the producer's perspective, before trade and transport margins and taxes are added.

The three pillars: India's new framework has three components — the Output PPI (prices received by producers for goods across agriculture, mining, manufacturing and electricity), the trial Input PPI for manufacturing (prices paid by producers for inputs, published experimentally since March 2026), and the Services PPI covering seven services — banking, securities transactions, insurance, pension fund management, railways, air passenger transport and telecom — released quarterly. Services are thus captured for the first time on the producer side, a long-standing gap in the WPI.

Key technical differences from the WPI: The WPI, Output PPI and Services PPI are compiled at the basic price, which excludes net taxes and trade and transport margins, while the Input PPI uses the purchaser's price since industries buy inputs from the market. Unlike the WPI, which measures wholesale transaction prices and can double-count as goods move through supply chains, the PPI tracks prices at the point of production, making it conceptually cleaner.

Why the transition matters: The move from WPI to PPI aligns India with the global best practice of advanced economies and the recommendations of the IMF. Reading the Output and Input PPIs together reveals how input-cost inflation is passed through to output prices — and thus whether producer margins are expanding or compressing. It also enables double deflation in estimating real GDP, where output and inputs are deflated by separate price indices, improving the accuracy of national accounts.

What the first PPI readings show: Output PPI inflation rose to 9.57 per cent in June from 9.38 per cent in May, broadly tracking the WPI. But the trial input PPI for manufacturing rose a sharp 2.1 per cent month-on-month against a 0.3 per cent rise in the output PPI — evidence that input costs are rising faster than producers can raise their own prices, squeezing profit margins.

The fuel shock at the root: The proximate cause is the West Asia conflict and the disruption of the Strait of Hormuz, the chokepoint through which most of India's crude oil imports pass. Crude prices, which had eased to the low $70s after the interim peace accord, climbed back above $80 as conflict resumed. Fuel and power inflation, though moderating in June to 27.41 per cent, remains extraordinarily elevated — mineral oils alone recorded 46.48 per cent inflation.

The food acceleration: Food inflation is now taking over as the driver. The WPI Food Index at 6.14 per cent is an 18-month high, propelled by month-on-month spikes in vegetables (drumstick, capsicum, tomato, onion), protein items (meat, eggs) — a combination of deficient rainfall, seasonal supply tightness, and the pass-through of higher fuel and transport costs to farm-gate and mandi prices. Economists at India Ratings note that month-on-month momentum is currently a better gauge than year-on-year rates, which are distorted by the base effect and the El Niño effect of the previous year.

From deflation to near double digits: As Bank of Baroda's chief economist observed, the wholesale inflation rate has travelled from mild deflation around November 2025 to nearly 10 per cent in June — a warning that the era of low inflation is over, with WPI inflation expected to stay in the 9–10 per cent range in the coming months, the monsoon and the kharif crop being the key variables.

Generalisation of price pressures: What worries economists most is the breadth of the increase: with manufactured products — two-thirds of the index — running at 7.48 per cent, and double-digit inflation in metals, chemicals, textiles and electrical equipment, inflation is no longer confined to fuel. Generalised wholesale inflation eventually feeds retail prices, and CPI inflation has already risen to a 17-month high of 4.38 per cent.

Different baskets, different perspectives: The Consumer Price Index (CPI), compiled by the National Statistics Office of the Ministry of Statistics and Programme Implementation, measures retail price changes in the basket of goods and services consumed by households. The WPI measures wholesale prices of goods only. The weight of food is far higher in the CPI (over two-fifths) than in the WPI, while manufactured products dominate the WPI; services such as housing, education and health appear only in the CPI.

Why they diverge: Because of these differences in composition, coverage and the point of price collection, WPI and CPI can diverge sharply — as now, with WPI near 10 per cent while CPI is at 4.38 per cent. Fuel and metal price shocks show up much more forcefully in the WPI; service-price and housing trends show up only in the CPI.

Monetary policy anchor: Since 2014, on the recommendation of the Urjit Patel Committee, the Reserve Bank of India has used the CPI (combined) as its key measure of inflation. Under the flexible inflation targeting framework introduced by amending the RBI Act in 2016, the Monetary Policy Committee (MPC) must keep CPI inflation at 4 per cent, within a tolerance band of 2 to 6 per cent. The WPI is not the policy target — but sustained wholesale inflation is a leading indicator of future retail inflation and directly enters the GDP deflator, affecting the measurement of real growth.

For monetary policy: With WPI near 10 per cent, input PPI signalling cost pressures, and CPI accelerating towards the upper half of the tolerance band, the RBI faces a narrowing window: premature easing risks entrenching inflation, while tightening amid a supply-driven shock could hurt growth. The supply-side origin of the shock — fuel and food — limits what monetary policy alone can achieve.

For businesses: The gap between input-cost inflation and output-price inflation implies margin compression, particularly for manufacturing; firms will either absorb costs (hurting profits and investment) or pass them on (adding to retail inflation).

For households and the fisc: Higher wholesale food and fuel prices squeeze real incomes, especially of the poor, and raise pressure for fiscal responses — excise duty cuts on fuels, buffer-stock releases of vegetables and cereals, and trade measures — each with revenue or market side-effects.

For statistics and policy design: The episode is also the first real stress test of the new WPI-PPI architecture. The simultaneous availability of output and input price indices is already yielding sharper diagnosis — showing, for instance, that the current inflation is import-cost-driven with margin compression — the kind of insight the old WPI alone could not provide.

Managing the current inflation episode requires supply-side and demand-side instruments working in tandem. On the supply side, the immediate priorities are securing crude supplies and diversifying import routes amid the Hormuz disruption, calibrated use of excise duties on fuels, release of buffer stocks and import flexibility for vegetables and pulses, and close monitoring of the monsoon's progress for the kharif crop, which economists identify as the decisive variable. On the demand side, the RBI's Monetary Policy Committee must anchor inflation expectations as CPI drifts up, communicating clearly while avoiding overreaction to a supply shock that monetary tightening cannot directly cure. Structurally, the episode validates India's statistical reforms: completing the transition from WPI to a full-fledged Producer Price Index — including a stabilised input PPI and wider services coverage — will give policymakers a far sharper read on cost pass-through, margins and real GDP. Finally, reducing the economy's vulnerability to imported fuel shocks through strategic reserves, renewables and energy efficiency remains the only durable insurance against wholesale inflation of the kind India is now witnessing.