- Why in news
- On 16 March 2026 the government told the Rajya Sabha that MoSPI shifted the GDP base year from 2011-12 to 2022-23, with revised estimates released on 27 February 2026.
- What it is
- The base year is the reference year whose prices and structure are used to measure real output and to weight indices. India revises it every several years so that GDP, IIP and price indices reflect the current economy. The previous GDP series used 2011-12 as base.
- New base year
- GDP base year changed from 2011-12 to 2022-23; revised estimates released on 27 February 2026.
- Classification used
- GDP compilation uses National Industrial Classification (NIC)-2025.
- CPI 2024 series
- The CPI 2024 series introduces Computer Assisted Personal Interviewing (CAPI) for price collection using handheld devices.
- IIP new base
- The new IIP series has base year 2022-23, with wider coverage and updated weights.
- Nowcasting
- Economic Survey 2025-26 presents a nowcasting framework using high-frequency indicators to give early GDP growth estimates before official quarterly data.
- Monthly Economic Review
- The Department of Economic Affairs publishes the Monthly Economic Review.
- Release date
- The new series is scheduled for release on 27 February 2026.
- Data sources sub-committee
- It was headed by Manish Sinha, CEO of GSTN, with members from academia, Centre, States and RBI.
- GST data use
- GST outward supplies data will be used to allocate GVA of private corporations among States/UTs.
- ASUSE and PLFS
- Household sector and quasi-corporation GVA is now compiled from ASUSE (annual since 2021-22) and PLFS (since 2017-18), removing the need to extrapolate base-year estimates.
- Advisory Committee
- ACNAS, chaired by Prof. B.N. Goldar, advised on methodology and new data sources.
- Double deflation
- Output and intermediate consumption are deflated separately to get Value Added at constant prices; used for manufacturing industries.
- Deflators used
- The new series uses CPI (Base 2024), UVI (Base 2022-23) and WPI (Base 2022-23) or PPI when available.
Don’t confuse with Real vs nominal GDP: Real GDP is measured at base-year (constant) prices; nominal GDP at current prices.
Don’t confuse with GDP vs GVA: GVA is output minus intermediate consumption; GDP equals GVA plus product taxes minus product subsidies.
Don’t confuse with GVA vs GDP: GDP equals GVA plus product taxes minus product subsidies.
Don’t confuse with PFCE vs GFCF: PFCE is household consumption spending; GFCF is investment in fixed assets.
Don’t confuse with Double deflation vs single deflator: Single deflator uses one price index for the whole sector; double deflation deflates output and inputs separately.
Economy terms and data: 42 Prelims questions since 2013, rising in recent years; they test what a term or instrument means. In Mains, 12 news-triggered questions.
Why it matters
- A recent base year captures current economic structure, including services and the digital economy, making estimates more accurate for policy.
- Wider use of administrative data such as GST makes GDP estimates more accurate and timely.
- Better regional allocation improves State-level GSDP estimates.
- Double deflation gives a better measure of real value added, especially in manufacturing.
- A recent base better reflects current economic structure and consumption patterns.
Problems
- Revised series break comparability with older data, complicating long-term trend analysis.
- Revision breaks comparability with the older series, so back series are needed.
- Administrative data such as GST may carry coverage and compliance gaps.
- Double deflation needs detailed input price data, which is not always available.
- Series break makes comparison with old 2011-12 data harder.
Way forward
- Publish back series and clear linking methods, and keep widening administrative data sources.
- Publish linked back series and clear documentation for users.
- Keep improving survey coverage of the unincorporated sector.
- Expand price and volume data collection so double deflation covers more sectors.
- Publish back series for comparability.
Put in your answer
Nowcasting indicators: High-frequency indicators include electricity use, steel and cement output, GST, e-way bills, PMI, railway freight and air traffic.
GST data in accounts: GST data is a high-frequency source with activity, product and regional markers, so it is used to compile and corroborate national accounts.
ANA-QNA alignment: The revised framework aligns annual and quarterly accounts for consistency.
- 2021Mains GS3 · Q1Explain how India's GDP computation methodology changed after 2015, versus before.
- 2013Mains ESSAY · Q3Whether GDP along with GDH suits judging a country's well-being.
- 2001Prelims Q89Match publishers with publications, including CSO's National Accounts Statistics.
- 2010Prelims Q86Compare WPI and CPI(IW) on monthly availability and food weightage.
- 2020Prelims Q67Compare food weightage and service coverage in CPI versus WPI, and RBI's inflation measure.
UPSC’s own questions that come close to this issue, from our Prelims and Mains banks.
Prelims practice · Single answer
Ours, not from a UPSC paper
Consider the following statements about the revision of India's GDP base year announced in 2026:
Which one of the following statements is correct?
True or false?
1 of 17
Statements the way Prelims prints them. Say first, then see the fact.
1.The revised GDP series released in February 2026 uses 2022-23 as its base year.
True. Base year moved from 2011-12 to 2022-23.
2.The CPI 2024 series introduces Computer Assisted Personal Interviewing for price data collection.
True. CAPI with handheld devices is introduced.
3.The Monthly Economic Review is published by the Department of Economic Affairs.
True. DEA publishes the MER.
4.Nowcasting uses high-frequency indicators such as GST collections, e-way bills and electricity consumption to estimate economic activity before official quarterly GDP data.
True. Nowcasting gives early estimates from HFIs.
5.Changing the base year of GDP changes the year whose prices are used to calculate nominal GDP.
False. Base year prices are used for real GDP (constant prices); nominal GDP uses current prices.
6.The Advisory Committee on National Accounts Statistics for the revision was chaired by Manish Sinha.
False. Prof. B.N. Goldar chaired ACNAS; Manish Sinha headed the data sources sub-committee.
7.In the new series, GST data will be used to allocate the GVA of private corporations among States and UTs.
True. GST outward supplies data is used for regional allocation.
8.In the 2011-12 series, GST data was not used in any national accounts compilation.
False. It was used in Quarterly National Accounts and some sectors of Annual National Accounts.
9.ASUSE has been conducted annually by MoSPI since 2021-22.
True. ASUSE annual since 2021-22; PLFS since 2017-18.
10.PFCE benchmark estimates in the new series are based mainly on the Annual Survey of Industries.
False. HCES 2022-23 is used for direct estimation of benchmark PFCE.
11.For GVA of private NBFCs, the new series replaces proxy-based loan growth with actual financial data from the Ministry of Corporate Affairs database.
True. MCA database data replaces the proxy-based sample method.
12.The new GDP series of India uses 2022-23 as its base year.
True. Base year is FY 2022-23, replacing 2011-12.
13.Under double deflation, only the output is deflated by a price index, while intermediate consumption is kept at current prices.
False. Output and intermediate consumption are both deflated separately.
14.In the new series, double deflation is adopted for various industries in the manufacturing sector.
True. Double deflation is used for manufacturing industries.
15.The new series uses Unit Value Indices at commodity-group level to deflate exports and imports of goods.
True. Disaggregated UVI is used for goods trade.
16.The Advisory Committee on National Account Statistics for the new series was chaired by Prof. B.N. Goldar.
True. Prof. B.N. Goldar chaired ACNAS.
17.National Accounts Statistics in India are compiled and released by the Reserve Bank of India.
False. MoSPI (through NSO) compiles National Accounts.
Written by us from the release, not by UPSC; checked by a second model.
Worth revising until Prelims 2027: most news questions come within two years of the event.