Why in News The Office of the Economic Adviser, Department for Promotion of Industry and Internal Trade (DPIIT), Ministry of Commerce and Industry, on May 14, 2026 released the Wholesale Price Index (WPI) data for April 2026. Headline WPI inflation rose to 8.30 per cent year-on-year, sharply higher than 3.88 per cent in March 2026 – a 42-month high. The principal driver was a 24.71 per cent year-on-year jump in the Fuel & Power group, the steepest reading for that group since September 2022.
Headline Numbers
| Indicator | April 2026 | March 2026 | Driver |
|---|---|---|---|
| Headline WPI (YoY) | 8.30 per cent | 3.88 per cent | Fuel & Power |
| Month-on-month change | 3.86 per cent | – | Crude/petroleum |
| Fuel & Power (YoY) | +24.71 per cent | – | Petrol +32.40 per cent; HSD +25.19 per cent |
| Primary Articles (YoY) | +9.17 per cent | – | Vegetables, fruits |
| Manufactured Products (YoY) | +4.62 per cent | – | Basic metals, chemicals |
| WPI Food Index (YoY) | +2.31 per cent | +1.85 per cent | – |
What Drove the Spike
Fuel & Power – the Principal Driver
- Petrol +32.40 per cent year-on-year
- High-Speed Diesel (HSD) +25.19 per cent year-on-year
- LPG, kerosene and aviation turbine fuel also up sharply
- Reflects the Strait of Hormuz war-risk premium and crude trading near USD 95-100 per barrel in late April
Primary Articles
- Vegetables and fruits saw sharp YoY rises on base effects – April 2025 had been a low month
- Minerals and crude petroleum sub-group also up
Manufactured Products
- Basic metals and chemicals (intermediate inputs) rose on input-cost pass-through
- This is the WPI sub-group where CPI rigidity is most visible – price stickiness is higher than in primary articles
WPI Structure – Base Year 2011-12
| Group | Weight (per cent) |
|---|---|
| Primary Articles | 22.62 |
| Fuel & Power | 13.15 |
| Manufactured Products | 64.23 |
| All Commodities | 100.00 |
A revision of the WPI base to 2017-18 has been under consideration by the Working Group constituted under Ramesh Chand, NITI Aayog Member (2018-19). The new base would re-weight services-linked inputs.
WPI Versus CPI – A Key Distinction
| Parameter | WPI | CPI-Combined |
|---|---|---|
| Compiled by | Office of the Economic Adviser, DPIIT, Ministry of Commerce & Industry | NSO, MoSPI |
| Base year | 2011-12 | 2012 |
| Includes services? | No | Yes |
| Used for | Producer-side, GDP deflator | Monetary policy anchor (RBI MPC) |
| Inflation-targeting? | No | Yes (4 per cent +/- 2 per cent) |
| Coverage | Wholesale prices of goods | Retail prices of goods and services |
The flexible inflation-targeting framework under Section 45ZA-ZN of the RBI Act, 1934 (inserted in 2016) anchors monetary policy on CPI-Combined, not WPI. The April CPI-Combined is released by NSO around the 12th of each month – the same April reading came in at 3.16 per cent (illustrative), suggesting the producer-consumer gap.
Why Does WPI Diverge From CPI?
- WPI excludes services which weigh ~28 per cent of CPI-Combined
- WPI excludes taxes (excise, GST) – the CPI does include taxes
- WPI tracks bulk wholesale transactions; CPI tracks the household basket
- A spike in fuel WPI may not pass through immediately to CPI because of administered pricing of LPG/kerosene, VAT/Excise buffers, and OMC absorption at the retail level
- Conversely, services-heavy CPI inflation (rents, health, education) is missed by WPI
RBI’s Likely Response
- The 6-member Monetary Policy Committee (MPC) under RBI Governor Sanjay Malhotra (in office since December 2024) anchors monetary policy on CPI-Combined
- The April WPI spike is a price-pressure signal but not a direct trigger for the policy repo rate
- However, sustained fuel-CPI pass-through could constrain rate-cut headroom; the June 2026 MPC review will be watched
Sectoral Implications
Producers
- Margin compression for manufacturing units with inelastic output prices
- Higher input costs likely to flow into June PMI softening (Manufacturing PMI)
Government Finance
- Each USD 10/barrel increase in crude raises India’s import bill by ~USD 12-14 billion
- Subsidy outgo on LPG (under PMUY) and kerosene pressured
- Pressure to revisit excise duty cuts on petrol/HSD by the Centre, and VAT cuts by States
MSMEs
- Most exposed to wholesale input-price shocks; pass-through to retail limited by demand elasticity
- TReDS-based receivables financing may help – but does not absorb commodity shocks
UPSC Relevance
GS Paper 3 – Indian Economy
- Inflation measurement and inflation targeting
- WPI vs CPI – methodology and policy use
- Energy security and current account vulnerability
- Monetary policy transmission
GS Paper 2 – Statutory Bodies
- Constitutional and statutory architecture of the RBI; MPC framework under RBI Act, 1934
Mains Angles
- Distinguish WPI and CPI in design and policy use. Why does India target CPI-Combined?
- India’s CAD is vulnerable to oil-price shocks. Discuss the policy buffers available to the Centre and the RBI.
- Should the WPI base year revision be expedited? Examine in light of structural change in the Indian economy.
Facts Corner – Knowledgepedia
WPI: Wholesale Price Index; compiled by the Office of the Economic Adviser, DPIIT, Ministry of Commerce and Industry (NOT MoSPI); base year 2011-12; three major groups – Primary Articles (22.62 per cent), Fuel & Power (13.15 per cent), Manufactured Products (64.23 per cent); released monthly on the 14th (or next working day).
CPI-Combined: Released by National Statistical Office (NSO), MoSPI; base year 2012; covers urban + rural; weighted by Modified Mixed Reference Period (MMRP) household consumption.
Inflation Target: 4 per cent +/- 2 per cent on CPI-Combined; set by Central Government in consultation with RBI under Section 45ZA, RBI Act, 1934; current target valid till 2026.
MPC: Monetary Policy Committee; six members (three RBI – Governor, Deputy Governor in charge of monetary policy, one Executive Director; three external nominated by the Central Government); Governor has casting vote; meets at least four times a year (usually six).
GDP Deflator: Implicit price deflator = Nominal GDP / Real GDP; uses both WPI and CPI weights in compilation.
Headline vs Core Inflation: Headline = all items; Core = excludes food and fuel (more stable – reflects underlying demand pressure).
CSO/NSSO/NSO: Central Statistical Office (CSO) and National Sample Survey Office (NSSO) merged in 2019 to form the National Statistical Office (NSO) under MoSPI.
Strait of Hormuz: Carries ~20-21 million barrels per day – about 20-25 per cent of global seaborne oil trade; the principal upside risk to crude.
India’s crude imports: ~85+ per cent of consumption; Russia, Iraq, Saudi Arabia, UAE and US are the top suppliers.
