📰 Revised Base Year for GDP and Other Economic Indicators

📌 Context: Saurabh Garg, Secretary, Ministry of Statistics and Programme Implementation (MoSPI), announced that the base year for India's GDP calculation is being revised from 2011-12 to 2022-23. The revised data series will be released on February 27, 2026.

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📊 What is a Base Year?

• The base year is the reference year for comparing the current prices and volumes of goods and services to assess real economic growth.
• It helps in calculating real GDP (adjusted for inflation) and nominal GDP (current prices).

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🧮 Upcoming Base Year Changes:

Indicator	Current Base Year	New Base Year
GDP (Gross Domestic Product)	2011–12	2022–23
IIP (Index of Industrial Production)	2011–12	2022–23
CPI (Consumer Price Index)	2012	2023–24

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📌 Historical Revisions of GDP Base Year:

India has revised the GDP base year 7 times previously. The 2022–23 revision will be the 8th.

Previous Base Year	Revised To	Year of Revision
1948–49	1960–61	August 1967
1960–61	1970–71	January 1978
1970–71	1980–81	February 1988
1980–81	1993–94	February 1999
1993–94	1999–2000	January 2006
1999–2000	2004–05	January 2010
2004–05	2011–12	January 2015

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🔍 Why Revise the Base Year?

1. 🆕 Reflect structural changes in the economy (e.g., rise of services sector, decline in agriculture share).
2. 🎯 Improve data quality and methodology based on better availability (e.g., use of NSSO surveys).
3. 🔍 Accurate measurement of real growth by adjusting inflation and price changes.
4. 📈 Inclusion of emerging sectors, exclusion of outdated sectors.

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⚠️ Why was 2017–18 not used as the base year?

• Originally planned for revision.

• But discarded due to data quality concerns and economic disruptions:

  • 📉 PLFS 2017–18 showed highest unemployment rate in 45 years.

  • 📉 CES 2017–18 showed a decline in consumption, indicating rising poverty.

  • 📉 Major economic disruptions:

    • Demonetisation (2016)
    • Introduction of GST (2017)

• 📉 GDP growth fell from 8% (2016–17) to <4% (2019–20).