Examine the rationale behind revising the base year of India's price indices to 2022-23. What are the challenges in measuring services-sector inflation?
The base year of the Wholesale Price Index was revised from 2011-12 to 2022-23, with the new series released alongside Output, Input and Service Producer Price Indices [1]. The shift realigns India's price statistics with a services-led economy and with global measurement practice.
Rationale for the 2022-23 revision
- Outdated basket and weights: the 2011-12 basket no longer reflected present consumption and production patterns, weakening the index's representativeness [2].
- Capturing structural change: services now contribute over half of GVA, yet WPI covered only goods; the new framework introduces India's first dedicated Service PPI, covering seven services — banking, securities transactions, insurance, pension fund management, railways, air (passenger) and telecom [1].
- Alignment with global best practice: following IMF recommendations, WPI is to run for five years alongside PPI and then be discontinued, moving India to a producer-price framework [1].
- Better deflators: producer-side indices improve GVA deflation, complementing the parallel revision of the GDP series to a 2022-23 base [3].
Challenges in measuring services inflation
- Heterogeneity of output: services lack a standard physical unit, making price comparison over time difficult; MoSPI's approach paper treats defining the priced "unit" as the core methodological hurdle [4].
- Implicit and bundled pricing: banking and insurance charges are embedded in spreads and premiums rather than quoted prices; telecom tariffs bundle voice and data.
- Quality change: improvements in speed, coverage or convenience are hard to separate from pure price change.
- Dynamic and negotiated pricing: air fares vary by seat and season — Q1 FY 2026-27 showed air passenger prices rising sharply while telecom inflation remained near-flat [5].
- Limited coverage and data infrastructure: only seven services are tracked so far, and the companion Index of Services Production is still at the trial stage [6].
The revision is thus a necessary modernisation rather than a routine rebasing. Widening service coverage, strengthening producer-level data collection and periodic rebasing will make India's inflation measurement more credible and internationally comparable, supporting evidence-based monetary and fiscal policy.
Sources
- 1Press Release on New Series of Wholesale Price Index and Producer Price Indices with Base Year 2022-23, PIBrelease of new WPI/PPI series, Service PPI coverage of seven services, IMF alignment and five-year WPI phase-out
- 2Base Year of Wholesale Price Index Revised from 2011–12 to 2022–23, PIBoutdated basket and weights as the ground for rebasing
- 3New Series of Gross Domestic Product (GDP) Estimates with Base Year 2022-23, PIBparallel GDP rebasing and deflator linkage
- 4Approach Paper on Compilation of the Index of Services, MoSPImeasurement difficulties arising from heterogeneous, non-standard service output
- 5Provisional Estimates of Service Producer Price Indices (Base Year 2022-23) for Q1 FY 2026-27 and Final Indices for Q4 FY 2025-26, PIBdivergent movement of air passenger and telecom service prices
- 6FAQs on Index of Services Production – Trial Indices with Base Year 2024-25, PIBtrial status and limited coverage of the services index framework
Practice
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