What Happened
- India's Wholesale Price Index (WPI) based inflation rose to 1.81% in January 2026, a 10-month high, up from 0.83% in December 2025.
- The spike is the highest since March 2025 when WPI stood at 2.05%.
- Manufactured products recorded an inflation rate of 2.86%, and primary articles stood at 2.21%, driving the overall increase.
- The WPI index number for all commodities increased to 157.8 in January from 157.0 in December, a month-on-month rise of 0.51%.
- Food articles and manufactured products were the primary drivers, while fuel and power prices remained subdued.
Static Topic Bridges
Wholesale Price Index (WPI) — Methodology and Compilation
The WPI is compiled and released monthly by the Office of the Economic Adviser (OEA) in the Department for Promotion of Industry and Internal Trade (DPIIT), Ministry of Commerce and Industry. The current series uses 2011-12 as the base year (7th revision). The WPI measures average change in prices of goods at the wholesale or producer level before they reach the consumer, covering 697 commodities grouped into three major categories.
- Base year: 2011-12 = 100 (revised from 2004-05)
- Three major groups: Primary Articles (weight: 22.62%), Fuel & Power (13.15%), Manufactured Products (64.23%)
- Total commodities: 697 items
- Data sources: Market prices collected from designated centres across India
- Elementary price index computed using geometric mean of price relatives (methodological improvement over arithmetic mean in 2004-05 series)
- Released on the 14th of every month (provisional data for two months prior)
- WPI does not include services — it only covers goods
Connection to this news: The January 2026 WPI of 1.81% reflects cost pressures at the wholesale level, particularly in manufacturing inputs and primary articles, which may translate to consumer price increases in coming months.
WPI vs CPI — Dual Inflation Measurement in India
India uses two inflation indices: WPI measures wholesale/producer-level price changes while the Consumer Price Index (CPI) measures retail prices paid by consumers. Since 2014, CPI has been adopted as the headline inflation measure for monetary policy (inflation targeting by RBI). The two indices differ in composition, weights, and the economic stage they capture.
- CPI is compiled by the National Statistical Office (NSO), MoSPI; WPI by OEA, DPIIT
- CPI base year: 2012 = 100; WPI base year: 2011-12 = 100
- CPI includes services (housing, education, health); WPI does not
- CPI gives highest weight to food and beverages (45.86%); WPI gives highest weight to manufactured products (64.23%)
- RBI's inflation target: 4% CPI with +/- 2% band (2-6%), set under the Monetary Policy Framework Agreement (2016)
- Inflation targeting framework established under amended RBI Act, 1934 (Section 45ZA) by the Finance Act, 2016
- The Urjit Patel Committee (2014) recommended CPI as the nominal anchor for monetary policy
Connection to this news: While WPI at 1.81% signals rising input costs at the producer level, the RBI monitors CPI for its monetary policy decisions. Persistent WPI increases may feed into CPI with a lag, influencing future rate decisions by the Monetary Policy Committee.
Inflation Dynamics — Cost-Push and Demand-Pull Factors
Inflation can arise from demand-pull factors (excess demand in the economy) or cost-push factors (rising input costs pushing up prices). In India, food inflation is predominantly supply-driven (monsoon, storage, logistics), while manufactured goods inflation reflects global commodity prices, exchange rate movements, and domestic input costs.
- Cost-push inflation: Rising raw material prices, energy costs, and supply chain disruptions
- Demand-pull inflation: Excess money supply, government spending, credit expansion
- India's WPI inflation had been in negative territory (deflation) for much of 2023, before turning positive in mid-2024
- Global commodity prices (crude oil, metals) significantly influence India's WPI through the fuel and manufactured products categories
- Administered pricing of certain commodities (fertilizers, LPG) can mask true cost pressures
- The Phillips Curve relationship (unemployment-inflation trade-off) has limited applicability in India due to structural factors
Connection to this news: The January 2026 WPI spike to 1.81% — driven by manufactured products (2.86%) and primary articles (2.21%) while fuel remained subdued — suggests cost-push pressures from commodity and food prices rather than demand-pull dynamics.
Key Facts & Data
- WPI inflation (January 2026): 1.81% (10-month high)
- WPI inflation (December 2025): 0.83%
- WPI inflation (March 2025): 2.05%
- WPI index number (January 2026): 157.8
- WPI index number (December 2025): 157.0
- Month-on-month WPI rise: 0.51%
- Manufactured products inflation: 2.86%
- Primary articles inflation: 2.21%
- WPI base year: 2011-12 = 100
- WPI covers 697 commodities
- RBI CPI inflation target: 4% (+/- 2% band)