PIB TrackerFactory output grows 5.1% — and India switches the yardstick it uses to measure it
India's Index of Industrial Production rose 5.1% in May 2026, even as MoSPI revamped the index itself — replacing the Wholesale Price Index with a new Output Producer Price Index as the deflator for a chunk of the basket.
What happened
- India's Index of Industrial Production (IIP) recorded 5.1% year-on-year growth in May 2026, supported by 5.5% growth in manufacturing and 9.9% in electricity and gas supply.
- MoSPI has decided to adopt the Output Producer Price Index (Output PPI) as the deflator in place of the Wholesale Price Index (WPI) for item groups where output is collected in value terms.
- This affects 234 of the 463 item groups in the IIP basket — about 36% of the index weight.
- MoSPI has revised and released the entire IIP 2022-23 series with Output PPI, superseding the earlier WPI-based 2022-23 series.
- The change follows DPIIT's release of an Output PPI series (base 2022-23); since part of industrial production is reported in value terms, a producer-level price index is a more appropriate deflator.
For Prelims
- Index of Industrial Production (IIP): A monthly index (compiled by MoSPI/NSO) measuring the volume of industrial output, with a base year 2022-23; classified by sectors (mining, manufacturing, electricity) and by use-based categories (primary, capital, intermediate, infrastructure, consumer durables/non-durables).
- Deflator: A price index used to convert value-term data into volume terms (removing the effect of price change). For items reported in value, a price deflator is needed to estimate real output.
- WPI vs Output PPI: The Wholesale Price Index tracks wholesale transaction prices; an Output PPI tracks prices received by producers at the factory gate — closer to actual output prices, hence a better IIP deflator.
- PPI for India: India has historically used WPI/CPI; DPIIT is developing a Producer Price Index — a long-pending statistical reform aligning India with global practice.
- Why it matters: A better deflator improves the accuracy of the IIP (and thus of GDP/IIP-linked estimates) — a quiet but important data-quality upgrade.
- Don't confuse: IIP (volume of output) is distinct from WPI/CPI (price indices); the Output PPI is a deflator within the IIP, not a replacement for the IIP itself.
For UPSC: India's IIP grew 5.1% in May 2026 as MoSPI replaced WPI with a new Output PPI deflator for ~36% of the basket. Anchor the IIP (MoSPI/NSO, base 2022-23, sectoral and use-based classification), deflators, WPI vs Output PPI (producer prices), the long-pending PPI reform (DPIIT), and data-quality in national statistics.
What it is NOT: The Output PPI is a deflator used within the IIP — not a replacement for the IIP, and distinct from WPI/CPI. The IIP measures the volume of output; switching to a producer-price deflator improves accuracy for value-term item groups, it does not change what the IIP measures.
For Mains
Syllabus: GS3.1 · GS3.8 · Linkage L2
Anchor
Industrial momentum and data quality — measuring factory output more accurately to guide policy.
Substantiation (data)
IIP +5.1% (May 2026); manufacturing +5.5%, electricity & gas +9.9%; Output PPI replaces WPI as deflator for 234/463 item groups (~36% weight).
Exemplification
Cite the IIP (base 2022-23, use-based categories) and the WPI→Output PPI deflator shift as examples of statistical-system modernisation.
Problematisation
Data revisions, base-year updates, deflator choice and capturing the informal sector challenge the accuracy of industrial statistics.
Way-forward
Roll out a full Producer Price Index, modernise base years and methods, and strengthen the statistical system for evidence-based policy.
Position
Government stance: adopting a producer-price deflator improves the IIP's accuracy, supporting better economic measurement and policy.
Deploys into: Industrial output & statistics (IIP/MoSPI) · deflators & the PPI reform (DPIIT) · data quality & GDP measurement · manufacturing growth (GS3.1 economy & data, GS3.8 industrial growth).
Ministry of Statistics & Programme Implementation · 2026-06-29 · PRID 2278961 · PIB source ↗