India’s Eighth National Accounts Revision with 2022-23 Base Year Introduces Double Deflation and Broader Data Improvements

Recent Developments:

• The Ministry of Statistics and Programme Implementation released India’s new series of National Accounts Statistics with 2022-23 as the base year on 27 February 2026, replacing the earlier 2011-12 base-year series. This represents India’s eighth base-year revision of the National Accounts.
• The series was subsequently updated on 31 August 2026 to incorporate the new Producer Price Index, Index of Industrial Production and other updated data inputs released in June 2026.
• On 21 September 2026, MoSPI released the Sources and Methods for Compilation of National Accounts Statistics, providing a consolidated account of concepts, definitions, data sources and methodologies used in the new series.
• The new series introduces important methodological improvements, including double deflation in agriculture and manufacturing, greater use of administrative data, improved coverage of the unincorporated sector and integration with the Supply and Use Table framework.

What are National Accounts?

Meaning and Framework:

• National Accounts Statistics provide a systematic framework for measuring an economy’s production, income, expenditure, saving, investment and external transactions.
• They provide major macroeconomic aggregates such as Gross Domestic Product, Gross Value Added, consumption, investment, saving and trade, following the principles of the United Nations System of National Accounts.
• National Accounts therefore provide the statistical foundation for assessing economic growth, structural transformation, sectoral performance and macroeconomic policy.

Evolution of India’s National Accounts Base Year:

Major Base-Year Revisions:

Base Year Year of New-Series Release

1960-61 1967

1970-71 1978

1980-81 1988

1993-94 1999

1999-2000 2006

2004-05 2010

2011-12 2015

2022-23 2026

• Base-year revision is undertaken periodically to ensure that relative prices, production structures, consumption patterns and emerging economic activities are adequately reflected in national income estimates.
• For the current revision, 2022-23 was selected because it was considered a relatively normal economic year and relevant survey information was available; intervening years were affected by events such as the GST transition and COVID-19 pandemic.

Calculation of GDP and GVA:

Three Approaches to National Income Accounting:

• Production Approach: GDP is derived from GVA of industries + taxes on products − subsidies on products.
• Expenditure Approach: GDP is measured through final consumption expenditure + gross capital formation + exports − imports.
• Income Approach: National income is derived through compensation of employees + operating surplus/mixed income + taxes less subsidies.

Nominal and Real Estimates:

• Current-price estimates measure economic activity using prices prevailing during the reference period, whereas constant-price estimates remove the effect of price changes to measure real economic growth.
• Deflators and price indices are therefore essential for converting nominal values into real output and GVA.
• The new series uses more granular price indices, including CPI, WPI, PPI and other appropriate indicators, depending on the nature of the activity.

Key Change: Double Deflation in Manufacturing:

Single Deflation versus Double Deflation:

• Under the earlier single-deflation approach, nominal manufacturing GVA was converted into real GVA using an aggregate price deflator.
• Under double deflation, the prices of output and intermediate inputs are adjusted separately, allowing real value added to be derived after removing price changes from both sides.
• Conceptually:
• Real GVA = Deflated Gross Value of Output − Deflated Intermediate Consumption
• Therefore, changes in both output prices and input prices are captured separately.

Data Sources and Item-Level Deflation:

• MoSPI uses Annual Survey of Industries data together with item-level Output Producer Price Indices based on ex-factory prices for manufacturing deflation.
• The Output PPI includes both final goods and intermediate goods, allowing the output price of one industry to serve as an input-price indicator for another industry.
• Relevant items include wheat, milk, bauxite, coking coal, electricity, refined palm oil, gram flour, cotton yarn, sacks, leather, naphtha, phosphoric acid, cement and semi-finished iron and steel.
• Items accounting for around 80% of output and input value are selected after ranking by value, and ASI-derived weights are used to deflate individual items separately.

Coverage and Limitations within Manufacturing:

• Of the 30 manufacturing categories, processed food and oils and pharmaceuticals are excluded from the double-deflation exercise because of high imported-input shares and difficulties in directly mapping input items with elementary output PPI.
• For service inputs where suitable producer price indices are unavailable, MoSPI uses consumer prices and implicit deflators as appropriate.
• The new methodology therefore represents a significant increase in price-measurement granularity, rather than simply replacing one aggregate deflator with another.

Double Deflation Beyond Manufacturing:

Agriculture and Other Sectors:

• The new National Accounts framework adopts double deflation in agriculture as well as manufacturing, while using volume or single extrapolation in other sectors where appropriate.
• This represents a methodological shift because the new framework has moved away from the earlier practice of single deflation as the general approach.
• The objective is to use the methodology most appropriate to the availability and characteristics of sector-specific data rather than applying a uniform deflation method across all activities.

Other Major Methodological Improvements:

New Data Sources and Sectoral Coverage:

• The new series incorporates greater use of GST data, Public Financial Management System data, e-Vahan data and other administrative datasets, alongside survey information.
• Coverage of the unincorporated sector has been improved through annual survey information, enabling better capture of changing economic activity.
• Activities of multi-activity enterprises are classified more accurately by segregating different activities instead of allocating the entire enterprise to a single major activity.

Supply and Use Table Integration:

• The new framework integrates National Accounts compilation more closely with the Supply and Use Table framework to reduce discrepancies between production-side and expenditure-side estimates.
• A Supply and Use Table records what industries produce and how goods and services are used by industries, households and other final users.
• The integration is intended to improve internal consistency and reconciliation within the National Accounts system.

Quarterly National Accounts:

• The new series introduces an improved benchmarking methodology for quarterly estimates, replacing the earlier proportional approach with Proportional Denton Benchmarking.
• Annual and quarterly estimates have been brought into closer alignment regarding sectoral classification, deflation strategies and estimation practices.

Revision in Treatment of Defined-Benefit Pensions:

Government Sector Accounting:

• The new series revises the treatment of defined-benefit pension schemes by estimating the present value of pension entitlements accruing to serving government employees.
• Under the earlier methodology, pension payments made to retired employees were used as a proxy for the increase in pension entitlements of serving employees.
• The revised treatment follows the National Accounts principle that pension entitlements arising from current service should be reflected in compensation of employees.

Significance of the New Series:

Improved Measurement of Real Economic Activity:

• Double deflation provides a conceptually more appropriate measure of real GVA where reliable output and input price information is available.
• Item-level price measurement can improve consistency between production statistics and price statistics, particularly in manufacturing.
• Greater use of administrative datasets can improve timeliness, coverage and granularity of National Accounts estimates.

Better Representation of the Contemporary Economy:

• A new base year helps capture structural changes in production, consumption, investment, technology and services that may not be adequately represented by an older price structure.
• The new framework also improves the statistical representation of emerging activities and changing production relationships.

Concerns and Issues:

PPI and Deflator Challenges:

• India’s Producer Price Index remains experimental, creating concerns regarding the robustness, continuity and wider availability of producer-price information.
• Mapping intermediate inputs, particularly imported inputs and services, to domestic producer-price indices remains technically difficult.
• Differences between price indices can significantly affect measured real GVA because output and input prices may move at different rates.

Interpreting Manufacturing GVA and IIP:

• Index of Industrial Production growth and manufacturing GVA growth need not be identical because IIP measures changes in the physical volume of a fixed basket of sampled items, whereas GVA also incorporates intermediate consumption and broader sectoral coverage.
• MoSPI states that IIP growth is more directly comparable with Gross Value of Output at constant prices rather than manufacturing GVA.
• Therefore, changes in real manufacturing GVA should be interpreted alongside IIP, PPI, capacity utilisation and other industrial indicators, rather than using any single indicator in isolation.

Way Forward:

Strengthening India’s Statistical System:

• India needs to institutionalise a comprehensive Producer Price Index, improve item-level price collection and expand coverage of producer prices.
• Annual Survey of Industries and administrative datasets should be strengthened to improve coverage, quality and consistency.
• Better measurement of imported inputs, services and emerging economic activities is necessary for more accurate sectoral deflation.
• MoSPI should ensure transparent methodological documentation, periodic validation and user consultation as new data sources and price indices evolve.
• The continued alignment of National Accounts, State Domestic Product and District Domestic Product with the 2022-23 base year can improve comparability across levels of government.

Value Addition for UPSC:

Key Concepts:

• Base Year: A reference year whose prices are used to calculate constant-price estimates and measure changes in real economic activity.
• GDP: The monetary value of final goods and services produced within a country during a specified period.
• GVA: The value added by producers, calculated broadly as value of output − intermediate consumption.
• Deflator: A price index used to convert nominal economic values into real or constant-price values.
• Double Deflation: A method in which output and intermediate inputs are deflated separately before calculating real value added.
• Supply and Use Table: A statistical framework that reconciles the supply of goods and services with their use across industries and final demand.
• PPI: A producer-side price measure used to capture changes in prices received by producers and support the estimation of real output.

UPSC GS Linkages:

• GS-III: National income accounting, GDP, GVA, inflation measurement, industrial growth, statistical systems, manufacturing and economic policy.
• GS-II: Evidence-based governance, institutional capacity and the role of official statistics in public policy.
• Essay: The quality of economic policymaking depends on the quality, comparability and transparency of underlying statistical systems.
• Prelims Focus: Base year, GDP versus GVA, nominal versus real GDP, single versus double deflation, PPI, IIP, Supply and Use Tables and National Accounts methodology.

Important Data Points:

• 2022-23: New National Accounts base year.
• 27 February 2026: New National Accounts series released.
• 31 August 2026: Updated annual and quarterly series released with newer price and administrative data.
• 21 September 2026: Sources and Methods publication released.
• 8th: Base-year revision of India’s National Accounts.
• 30: Manufacturing categories covered in the double-deflation framework, with specified exclusions.
• 80%: Approximate output and input value represented by selected items for item-level manufacturing deflation.
• 2011-12: Base year of the previous National Accounts series.