Industrial output index rebased to 2022-23; April growth slows to 4.9%

Relevance:  General Studies Paper III — Indian Economy (growth, mobilisation of resources, key indicators)

1. What happened

India’s Index of Industrial Production — the official monthly gauge of how much the country’s factories, mines and utilities produce — grew 4.9% in April 2026, down from 5.8% a year earlier. More importantly, the Ministry of Statistics and Programme Implementation released a fully rebased and redesigned index: an updated base year, broader coverage of sectors, and a finer breakdown of what is being measured.

Concept : A “base year” is the reference year against which all later output is compared (the base year itself is set at a value of 100). It must be refreshed every few years so the index reflects today’s economy — new industries like renewable energy and rare-earth processing — rather than the technologies of a decade ago.

2. The redesigned index — at a glance

INDUSTRIAL PRODUCTION INDEX — FROM THE 2011-12 SERIES TO THE 2022-23 SERIES

BASE YEAR 2011-12  →  2022-23   (now aligned with the Gross Value Added base year, so the two move together)

 

SECTORS COVERED 3 sectors  →  4 sectors Added: Water Supply, Sewerage & Waste Management. Gas Supply has been folded into the Electricity sector.

 

BASKET OF GOODS TRACKED 839 items / 407 item-groups  →  1,042 items / 463 item-groups

 

NEW, FINER TRACKING Mining now separately measures rare earth minerals (critical for electric vehicles and defence). Electricity is now split into renewable and non-renewable sources — for the first time, allowing the green-energy shift to be measured directly.

APRIL 2026 — HOW EACH SECTOR PERFORMED

Mining & Quarrying (the weak spot)	−5.1%
Manufacturing	+6.2%
Electricity & Gas	+4.9%
Water, Sewerage & Waste (the strongest)	+6.6%

3. Why it matters

• The redesigned index lets policymakers see India’s clean-energy transition in real time — because renewable electricity and rare-earth mining are now counted on their own. 
• The fall in mining output is an early warning of possible supply-side bottlenecks, and the slowing headline number feeds into how the Reserve Bank of India reads the economy when setting interest rates. 
• Remember: this is a volume index — it tracks the physical quantity of output, not its rupee value, so it is not distorted by inflation.

UPSC VALUE BOX
Index of Industrial Production	A monthly volume index measuring the change in the physical quantity of industrial output against a base year. Compiled and released by the National Statistical Office under the Ministry of Statistics and Programme Implementation. New base year: 2022-23.
Two ways the index is classified	By source — Mining, Manufacturing, Electricity, and the new Water & Waste sector. By end-use — primary goods, capital goods, intermediate goods, infrastructure/construction goods, consumer durables, and consumer non-durables.
Index of Eight Core Industries	Tracks Coal, Crude Oil, Natural Gas, Refinery Products, Fertilizers, Steel, Cement and Electricity. These eight carried about 40% weight in the earlier industrial production index. Released by the Office of the Economic Adviser in the Department for Promotion of Industry and Internal Trade, Ministry of Commerce and Industry — a different ministry from the main index.
Gross Value Added	The value a producer adds = output value minus the cost of inputs bought from others. It is the basis on which the new index’s sector weights were recalculated.
Rare earth minerals	A set of 17 elements essential for electric-vehicle motors, electronics, wind turbines and defence systems. Now measured separately within the mining sector.

With reference to the revised Index of Industrial Production series, consider the following statements:

1. The new series uses 2022-23 as the base year, replacing the earlier 2011-12 base.
2. The revised series introduces a separate sectoral index for water supply, sewerage and waste management.
3. The Index of Eight Core Industries is compiled and released by the National Statistical Office.

How many of the above statements are correct?

(a) Only one

(b) Only two

(c) All three

(d) None

ANSWER: (B) ONLY TWO