Explain the difference between computing methodology of India’s Gross Domestic Product (GDP) before the year 2015 and after the year 2015.
Approach · directive: “explain”
What it asks · Explain how the January 2015 revision changed the way India measures GDP: the base year, the headline measure, the treatment of sector value added and the data sources.
It asks 2 things — answer each
- Explain how GDP was computed before 2015: base year 2004-05, GDP at factor cost, a narrow corporate data base
- Explain the post-2015 method (2011-12 base): GDP at market prices, GVA at basic prices, MCA21 and tax data, and what the difference meant
Open with · In January 2015 the Central Statistics Office moved India's national accounts to the 2011-12 base; GDP growth for 2013-14 read 6.9% in the new series, well above the old estimate, because the method changed as much as the base year.
Cover
- Before 2015: base year 2004-05; headline growth as GDP at factor cost; corporate sector captured from a small sample of company results.
- After 2015: base year 2011-12; headline growth as GDP at constant market prices, as the Economic Survey 2014-15 records.
- Sector output as GVA at basic prices (factor cost plus production taxes less production subsidies); GDP = GVA + product taxes - product subsidies.
- Wider data base: MCA21 company accounts, LLP firms, financial regulators, sales-tax and service-tax data (MoSPI press note, January 2015).
- Effect: 2012-13 and 2013-14 growth revised up (5.1% and 6.9%), comparability broken, a back series followed; MCA21 quality debated.
- Since then: MoSPI rebased to 2022-23 in February 2026, using GST and other administrative data.
Close with · MoSPI's rebasing to 2022-23 (February 2026) leans on GST and administrative data; transparent sources, more than any formula, decide whether India's growth numbers are trusted.
Add value (verified)
- The Economic Survey 2014-15 records that after the revision, headline growth is measured by GDP at constant market prices and sector value added at basic prices, in place of factor cost.Economic Survey 2014-15, Volume 2, Chapter 1, Box 1.1: Revision of the Base Year of National Accounts from 2004-05 to 2011-12 ↗“Headline growth rate will now be measured by GDP at constant market prices, which will henceforth be referred to as 'GDP', as is the practice internationally. Earlier, growth was measured in terms of growth rate in GDP at factor cost”
- MoSPI's January 2015 press note on the new 2011-12 series put GDP growth at 5.1% for 2012-13 and 6.9% for 2013-14.MoSPI press note, New Series of National Accounts (base 2011-12), 30 January 2015 ↗“Rs.92.8 lakh crore and Rs.99.2 lakh crore, respectively for the years 2012-13 and 2013-14, showing growth of 5.1 percent during 2012-13, and 6.9 percent during 2013-14.”
- The same note explains the wider corporate coverage: annual accounts filed with MCA under MCA21, and LLP firms.MoSPI press note, New Series of National Accounts (base 2011-12), 30 January 2015 ↗“incorporation of annual accounts of companies as filed with the Ministry of Corporate Affairs (MCA) under their e-governance initiative, MCA21. Partnership firms covered under Limited Liability Partnership Act have also been covered.”
- MoSPI notes that the old series measured sector output at factor cost and the new series at basic prices, which is why the two are not directly comparable.MoSPI press note, New Series of National Accounts (base 2011-12), 30 January 2015 ↗“Estimates for the earlier series (2004-05 series) have been derived from GVA at factor cost, while estimates for the 2011-12 series have been derived from GVA at basic prices.”
- In February 2026 MoSPI released a new GDP series with base year 2022-23, making extensive use of GST and other administrative data.PIB: MoSPI press note on the new series of GDP estimates with base year 2022-23, 27 February 2026 ↗“Extensive Use of GST and Various new Administrative Data sources for Quarterly National Accounts.”
Question: UPSC's CS (Main) 2021, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·
Model answer· 222words · Minimalist IAS
In January 2015 the CSO moved India's national accounts to the 2011-12 base; 2013-14 growth read 6.9% in the new series (MoSPI), well above the old estimate, because the method changed as much as the base year.
Computing GDP before 2015 (2004-05 series)
- Base year 2004-05: its prices and weights fixed the economy's structure.
- Headline at factor cost: growth was GDP at factor cost, which leaves out indirect taxes and subsidies.
The full answer goes on to cover
- Computing GDP after 2015 (2011-12 series)
- What the difference meant
With 1 table you can reproduce in the exam.
Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 3 Oct 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.
