What Happened
- India's Wholesale Price Index (WPI)-based inflation rose to 1.81% in January 2026, marking a 10-month high and extending the upward momentum for the third consecutive month.
- The WPI had recorded 0.83% in December 2025; the January 2026 figure represents a jump of nearly 100 basis points in a single month.
- Manufactured products (which carry the highest weight in the WPI basket) drove the increase, recording inflation of 2.86%.
- Other drivers included non-food articles, food articles, and textiles; manufacture of basic metals was specifically cited as a contributor.
- January 2026 also saw the first CPI reading under the new base year series (2024=100), with retail inflation at 2.75%.
Static Topic Bridges
Wholesale Price Index (WPI): Structure and Compilation
The WPI measures price changes at the wholesale or producer level — the first point of commercial transaction. It is compiled by the Office of the Economic Adviser (OEA) under the Ministry of Commerce and Industry, and published monthly with a lag of approximately 14 days for the provisional estimate and revision for the final estimate. Unlike CPI, which captures retail prices paid by consumers, WPI tracks prices at the factory gate or wholesale market — making it a leading indicator of cost-push inflationary pressure in the supply chain.
- Compiled by: Office of the Economic Adviser (OEA), Ministry of Commerce and Industry
- Current base year: 2011-12=100
- Basket composition (by weight): Manufactured products (~64%), Primary articles (~22%), Fuel and Power (~13%)
- Primary articles: Food articles + Non-food articles + Minerals
- Published: Monthly; provisional figure released ~14 days after reference month
- Key difference from CPI: WPI tracks producer prices (factory gate); CPI tracks consumer prices (retail)
- WPI no longer used as the inflation targeting anchor (CPI replaced it in 2016)
Connection to this news: The rise in WPI to 1.81% — driven by manufactured products at 2.86% — signals that producer-level cost pressures are building. If sustained, this may eventually pass through to retail CPI, which the RBI watches for monetary policy decisions.
WPI vs. CPI: Divergence and the "Inflation Pass-Through"
WPI and CPI often diverge because they measure different things in different markets. WPI measures prices before retail margins, taxes, and transportation costs are added. CPI includes all these plus services (which are not in WPI). When WPI rises faster than CPI, it signals that producers are absorbing margin pressure or that the cost-push has not yet passed through to consumers. When WPI is lower than CPI, it may indicate demand-pull inflation at the retail level. The gap between the two is closely watched by analysts.
- January 2026: WPI = 1.81%; CPI = 2.75% (new series) — CPI higher than WPI
- Pass-through: WPI → wholesale market → retail market → CPI; typically takes 1-3 months
- Services: Not included in WPI; heavily weighted in CPI — a key structural divergence
- GDP deflator: A broader price measure that covers all goods and services in GDP; different from both WPI and CPI
- WPI used for: Deflating manufacturing sector data in national accounts; indexation of some commodity contracts
Connection to this news: The concurrent release of the first CPI reading under the new 2024-base series alongside the WPI data created a comparison point — with CPI at 2.75% and WPI at 1.81%, the retail-wholesale divergence was visible, with higher retail prices partly reflecting services inflation not captured in WPI.
Key Facts & Data
- WPI January 2026: 1.81% (10-month high; up from 0.83% in December 2025)
- Third consecutive month of rising WPI: October 2025 → November → December → January
- WPI manufactured products: 2.86% in January 2026
- WPI food index: 1.41% in January (food articles + food products from manufactured goods)
- Food index level: Fell from 196.0 (December) to 194.2 (January) — month-on-month decline
- Manufactured products index: Rose 1.30% month-on-month (145.6 → 147.5)
- Key drivers: Basic metals, other manufacturing, non-food articles, food articles, textiles
- WPI base year: 2011-12=100; compiled by OEA, Ministry of Commerce and Industry
- CPI January 2026 (new series): 2.75% — higher than WPI, driven partly by services