What Happened
- MoSPI released a new GDP data series on February 27, 2026, shifting the base year from 2011-12 to 2022-23, triggering widespread questions about what changed and why growth estimates look different under the new framework.
- The revision incorporates updated inflation data (more granular deflators) and an expanded set of administrative databases — GST, UDYAM, e-invoice records — which together improve coverage of the services sector and small businesses.
- Under the new series, double deflation replaces single deflation in manufacturing: both output and intermediate inputs are now deflated separately, correcting a longstanding source of measurement error.
- The new series shows FY25-26 GDP growth at 7.6% (full year) and Q3 FY25-26 growth at 7.8% — both higher than estimates produced under the old 2011-12 base year framework.
- MoSPI released an official FAQ document alongside the new estimates to address common questions about comparability, methodology, and what the numbers mean for fiscal ratios and policy targets.
Static Topic Bridges
1. Why GDP Estimates Change When the Base Year Changes
GDP is measured in two ways: nominal GDP (at current prices) and real GDP (at constant prices, adjusted for inflation). Real GDP growth requires a "deflator" — a price index — to strip out inflation from nominal growth. When the base year is updated, the entire price basket used for deflation changes, producing different real growth figures even for the same underlying economic activity.
- A newer base year uses more accurate and representative prices, better reflecting current consumption and production patterns.
- The new series uses approximately 500-600 price indicators, up from around 180 in the 2011-12 series.
- Switching base years always makes older estimates non-comparable without a back-series; MoSPI plans to release a back-series by December 2026.
- GDP growth rates are relative measures (year-on-year change) and are far more stable across base year revisions than absolute GDP levels.
2. Nominal GDP, Real GDP, and the GDP Deflator
- Nominal GDP: Total value of goods and services at current market prices; rises with both real growth and inflation.
- Real GDP: Nominal GDP adjusted for price changes using a base year price level; reflects actual expansion in production.
- GDP Deflator: The ratio of nominal GDP to real GDP × 100; a broad measure of economy-wide inflation distinct from CPI or WPI.
- GVA vs GDP: Gross Value Added (GVA) = GDP at basic prices. GDP at market prices = GVA + taxes on products − subsidies on products.
- The new series expands deflation to cover services sub-sectors more granularly, improving GVA accuracy for finance, real estate, and professional services.
3. What the New Data Sources Add — GST, UDYAM, E-Invoicing
A key critique of the 2011-12 series was that it undercounted the formal sector's growth post-GST, because the Annual Survey of Industries (ASI) and enterprise surveys had significant lags and coverage gaps, especially for small manufacturers and service providers.
- GST data: Provides near-real-time output data for registered firms, covering over 14 million taxpayers.
- UDYAM: The MSME registration portal captures enterprise-level data for micro, small, and medium enterprises; over 5 crore enterprises registered as of 2025.
- E-invoicing: Mandatory for firms above a turnover threshold; provides granular B2B transaction data that feeds into output estimation for manufacturing and services.
- These administrative data sources reduce dependence on lagged survey-based estimation, especially for the informal-to-formal transition that GST accelerated post-2017.
4. Sectoral Composition of GDP and How It Has Shifted Since 2011-12
The 2022-23 base year captures a fundamentally different economy from 2011-12, justifying the revision beyond mere price level changes.
- Services now account for approximately 55-57% of GVA (up from ~51% in 2011-12), reflecting the growth of IT, financial services, and the gig economy.
- Manufacturing's share has remained relatively flat (~16-17% of GVA), making the double deflation correction particularly important.
- Agriculture's share has declined from ~18% to ~15% of GVA in nominal terms, though it remains the largest employer.
- The 2022-23 base captures the post-COVID structural formalisation of the economy, the mainstreaming of digital payments, and the expanded role of e-commerce.
Key Facts & Data
- New base year: 2022-23 (replacing 2011-12 which had been in use since January 2015).
- FY26 growth estimate: 7.6% (full year); Q3 FY26 at 7.8%.
- Price deflators used: ~500-600 (vs ~180 in old series).
- Double deflation: Now applied to manufacturing and agriculture sectors.
- New administrative data included: GST returns, UDYAM, e-invoicing.
- Back-series release: December 2026 (to allow historical comparisons).
- Services share of GVA: ~55-57% under the new series.