---
title: "National Income: GDP, GVA, Deflators & Base Years"
description: "Master GDP, GVA, deflators and base-year revisions in Indian national income accounting, the MOSPI and CSO concepts UPSC tests across Prelims and GS-3."
url: "https://modeldiplomat.com/learn/lessons/upsc-indian-economy-national-income-accounting-gdp-gva-deflators-base-years"
---

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National income accounting: GDP, GVA, deflators & base years

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# National income accounting: GDP, GVA, deflators & base years

Master GDP, GVA, deflators and base-year revisions in Indian national income accounting—the MOSPI/CSO concepts UPSC tests across Prelims and GS-3.

## The accounting identities you must internalise

National income accounting measures the value of economic activity in a defined period. India's estimates are compiled by the **National Statistical Office (NSO)** under the **Ministry of Statistics and Programme Implementation (MoSPI)**; until 2019 the **Central Statistics Office (CSO)** discharged this function. The framework follows the United Nations **System of National Accounts (SNA) 2008**, adopted by India in the **base-year 2011-12 series released on 30 January 2015**.

Start from production. **Gross Value Added (GVA)** is the value of output minus intermediate consumption, measured at **basic prices**—the price a producer receives, excluding product taxes but including production subsidies. Sum GVA across the eight sectors (agriculture; mining; manufacturing; electricity; construction; trade/hotels/transport; financial/real estate; public administration) and you get **GVA at basic prices**.

The bridge to GDP is a tax-subsidy adjustment:

**GDP at market prices = GVA at basic prices + Product Taxes − Product Subsidies.**

Product taxes include GST, customs and excise on products; product subsidies include food and fertiliser subsidies passed to producers. This is the single most-tested identity in the 2011-12 series, because the older 2004-05 series headlined **GDP at factor cost** rather than GVA at basic prices.

## From gross to net, domestic to national

Two further adjustments generate the family of aggregates:

- **Net** versus **Gross**: subtract **Consumption of Fixed Capital (depreciation)**. NDP = GDP − depreciation.
- **National** versus **Domestic**: add **Net Factor Income from Abroad (NFIA)**. GNP = GDP + NFIA. For India NFIA is typically **negative**, because outflows (profits, interest to foreign investors) exceed inflows, so GNP is marginally below GDP.

Combine both and you reach **Net National Income (NNI) at factor cost**, the formal definition of **national income**. **Per capita income** is NNI divided by population—frequently quoted in the Economic Survey.

## Real versus nominal

**Nominal GDP** values output at current prices; **real GDP** values it at constant (base-year) prices, stripping out inflation. The growth rate that headlines policy is **real GDP growth**. The conversion factor is the **GDP deflator**:

**GDP deflator = (Nominal GDP ÷ Real GDP) × 100.**

Unlike the CPI or WPI, the deflator is **derived, not separately surveyed**, and covers every good and service in GDP—making it the broadest inflation gauge. A candidate must distinguish the deflator (implicit, comprehensive) from the **CPI** (consumer basket, used by the RBI for the 4% ±2% inflation target) and the **WPI** (wholesale, no services). Retain that for FY 2023-24 India's nominal GDP was roughly ₹295 lakh crore with real growth near 8.2% (provisional, NSO, 31 May 2024).

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