GDP, GNP and NNP: Core National Income Aggregates
GDP, GNP, NDP, NNP, national income, factor cost vs market price vs basic prices, GVA, real vs nominal GDP and the GDP deflator for CGPSC.
Prerequisites
- None. This is the first page of the Economy section. Basic percentages are enough; if they feel rusty, skim Basic Numeracy first.
- After this page, read Measurement of National Income, which shows how these totals are actually calculated.
The Hook: One Family in Bhilai, Three Kinds of Income
A family in Bhilai (Durg district) has three earners. The father works at the Bhilai Steel Plant and is paid a salary. The daughter runs a small software firm in Bengaluru that also earns interest on a deposit placed in a bank in Singapore. The son has lived and worked in Dubai for six years and sends money home every month.
Which of these incomes is part of India’s GDP? Which is part of India’s GNP but not its GDP? And which is not part of either, even though it arrives in an Indian bank account?
By the end of this page you will be able to answer all three, and the same logic answers most Prelims questions on national income aggregates.
Why it matters: GDP, GNP, NNP, factor cost, market price and the GDP deflator are the vocabulary of every Economy question. Prelims tests the definitions and the traps between them; Mains (P-V GS-III) expects you to use them correctly when you write on growth, per capita income or Chhattisgarh’s GSDP.
Building Blocks: Flows, Final Goods and Value Added
| Concept | Meaning | Example |
|---|---|---|
| Stock vs flow | A stock is measured at a point of time; a flow is measured over a period | Capital stock, money supply (stock) vs national income, investment (flow) |
| Final good | Bought for final use: consumption by households or investment by firms | A family buys a bicycle; a factory buys a new machine |
| Intermediate good | Used up in producing another good within the same period | Iron ore used by a steel plant; flour used by a bakery |
| Value added (मूल्य वर्धन) | Value of output minus value of intermediate consumption | A bakery sells bread worth ₹500 after buying flour worth ₹300: value added = ₹200 |
| Depreciation (मूल्यह्रास) | Wear and tear of fixed capital in the year; officially called Consumption of Fixed Capital (CFC) | A tractor losing part of its value each season |
National income is a flow of final goods and services (or, equivalently, the sum of values added) produced in one year. Counting intermediate goods as well would mean double counting.
GDP: Gross Domestic Product (सकल घरेलू उत्पाद)
GDP is the market value of all final goods and services produced within the domestic territory of a country during a year, by residents and non-residents alike.
- “Domestic” means the geographical boundary is what matters, not who owns the factory. A plant in Raipur owned by a foreign company adds to India’s GDP.
- Domestic territory (in the national accounts sense) also includes Indian ships and aircraft operating abroad, Indian embassies and consulates abroad and fishing vessels operated by residents. Foreign embassies in New Delhi are not part of India’s domestic territory.
- “Gross” means depreciation has not been deducted.
Normal residents
A normal resident is a person or institution whose centre of economic interest lies in the country. As a working rule, someone who has lived abroad for one year or more is treated as a resident of the country where they live. So the son in Dubai in our hook is a resident of the UAE for national accounts.
From GDP to GNP: Net Factor Income from Abroad
Net Factor Income from Abroad (NFIA) is factor income (wages, rent, interest, profit) earned by Indian residents from the rest of the world, minus factor income earned by non-residents in India.
$$\text{GNP} = \text{GDP} + \text{NFIA}$$- GNP (Gross National Product, सकल राष्ट्रीय उत्पाद) follows residents, wherever they produce. It is also called GNI (Gross National Income) in current international usage.
- If NFIA is negative, GNP is less than GDP. India’s NFIA has been negative, because payments of interest, dividends and profits to foreign investors exceed similar receipts; so India’s GNI is a little below its GDP.
- In a closed economy (no foreign trade or factor movement), NFIA = 0 and GDP = GNP.
- Father’s salary at Bhilai Steel Plant: produced inside India by a resident. In GDP and in GNP.
- Daughter’s interest from Singapore: factor income of an Indian resident from abroad. In NFIA, hence in GNP but not GDP.
- Son’s remittances from Dubai: he is a resident of the UAE, so his wages are UAE production. The money he sends home is a current transfer, not a factor payment. It is not in India’s GDP or GNP (it enters the balance of payments and gross national disposable income instead).
Gross vs Net: Removing Depreciation
$$\text{NDP} = \text{GDP} - \text{Depreciation}$$$$\text{NNP} = \text{GNP} - \text{Depreciation}$$NNP (Net National Product, शुद्ध राष्ट्रीय उत्पाद) is a better measure of what an economy can consume without running down its capital stock. Depreciation is an estimate, which is one reason headline growth figures use GDP rather than NNP.
Market Price, Factor Cost and Basic Prices
The same output can be valued at three price levels. The difference is taxes and subsidies.
| Valuation | What it includes | Link |
|---|---|---|
| Market price (MP) | What buyers pay: includes all indirect taxes, net of subsidies | Headline GDP |
| Basic price | What the producer receives: includes production taxes but excludes product taxes | GVA at basic prices |
| Factor cost (FC) | Payment to the factors of production only: wages, rent, interest, profit, mixed income | National income |
Net indirect taxes = indirect taxes − subsidies.
$$\text{Factor cost} = \text{Market price} - \text{Net indirect taxes}$$The basic price concept splits indirect taxes into two kinds:
| Tax type | Meaning | Examples |
|---|---|---|
| Product taxes | Levied per unit of a product | GST, customs duty, excise duty |
| Production taxes | Levied on the act of production, irrespective of the quantity produced | Land revenue, stamp and registration fees, professional tax |
- In January 2015, with the 2011–12 base year series, the Central Statistics Office (CSO) shifted from “GDP at factor cost” to GVA at basic prices for sector-wise estimates, and GDP at constant market prices became the headline growth figure. This follows the UN System of National Accounts (SNA) 2008.
- The new series with base year 2022–23 was released on 27 February 2026 and keeps the same GVA-at-basic-prices and GDP-at-market-prices framework (see Measurement of National Income).
National Income and Its Relatives
National income (राष्ट्रीय आय) in the strict textbook sense is NNP at factor cost: the total factor income earned by the normal residents of a country in a year.
$$\text{NI} = \text{NNP}_{FC} = \text{GDP}_{MP} + \text{NFIA} - \text{Depreciation} - \text{Net indirect taxes}$$In official Indian statistics the comparable aggregate is Net National Income (NNI), and per capita income usually means per capita NNI at current prices.
| Aggregate | How to get it | Use |
|---|---|---|
| Private income | Factor income to the private sector + current transfers from government and abroad + interest on national debt | Income of the private sector |
| Personal income | National income − undistributed corporate profits − corporate tax − social security contributions + transfer payments | Income actually received by households |
| Personal Disposable Income (PDI) | Personal income − personal direct taxes (income tax) − miscellaneous fees and fines | What households can spend or save |
| Per capita income (प्रति व्यक्ति आय) | National income ÷ population | Average standard of living (hides inequality) |
Worked example: from GDP to national income
Suppose, in ₹ crore: GDP at market prices = 1,000; depreciation = 100; NFIA = −20; net indirect taxes = 80.
| Aggregate | Calculation | Value |
|---|---|---|
| GNP at MP | 1,000 + (−20) | 980 |
| NDP at MP | 1,000 − 100 | 900 |
| NNP at MP | 980 − 100 | 880 |
| NDP at FC | 900 − 80 | 820 |
| NNP at FC (national income) | 880 − 80 | 800 |
Nominal GDP, Real GDP and the GDP Deflator
- Nominal GDP (current prices) values output at the prices of the same year. It rises with both more output and higher prices.
- Real GDP (constant prices) values output at the prices of a fixed base year (आधार वर्ष). Only real GDP measures the growth of physical output, so “GDP growth rate” in the news means real GDP growth.
Example: nominal GDP ₹300 lakh crore and real GDP ₹250 lakh crore give a deflator of \( \frac{300}{250} \times 100 = 120 \), meaning the price level is 20% above the base year.
Shortcut: nominal growth \( \approx \) real growth + inflation (as measured by the deflator). For instance, if nominal GDP grows 10% and real GDP 6%, the deflator rises by about 4% (exactly \( 1.10 / 1.06 - 1 \approx 3.8\% \)).
| GDP deflator | CPI / WPI |
|---|---|
| Covers all domestically produced goods and services | Covers a fixed basket |
| Weights change with the composition of output each year | Fixed weights from a base-year survey |
| Excludes imports | CPI includes imported consumer goods |
| Available with GDP data (quarterly) | Released monthly |
According to the Provisional Estimates for 2025–26 released by MoSPI on 5 June 2026 (base year 2022–23):
- Real GDP growth: 7.7% in 2025–26, against 7.1% in 2024–25.
- Nominal GDP: about ₹346.36 lakh crore in 2025–26, up 8.9% from ₹318.07 lakh crore.
- Real GVA growth: 7.9%.
These numbers will be revised in later releases. Quote them with the year and the estimate type.
GDP and Welfare: Analysis for Mains
GDP is a measure of output, not of well-being. The standard limitations:
- Distribution: a high per capita income can hide sharp inequality between, say, Raipur–Bhilai and the districts of Bastar.
- Non-market work: unpaid household and care work (largely by women) is excluded.
- Externalities: pollution from mining or thermal power raises GDP while harming health. This motivates Green GDP (GDP adjusted for depletion of natural resources and environmental damage).
- Composition: ₹100 crore of defence spending and ₹100 crore of school meals add the same to GDP.
- Informal sector: output of unregistered enterprises is estimated from surveys and indicators, which adds uncertainty.
That is why GDP is read alongside measures such as the Human Development Index and multidimensional poverty, which are covered in Poverty and Employment.
Memory Tricks
- Domestic aggregates follow the territory: who cares who owns the plant, it is on Indian soil.
- National aggregates follow the residents: add what they earn abroad, subtract what foreigners earn here (NFIA).
Every aggregate is just three switches flipped from GDP at MP:
- Domestic → National: + NFIA
- Gross → Net: − Depreciation
- Market price → Factor cost: − Net indirect taxes
Flip all three and you reach NNP at FC = National Income.
Don’t Confuse
| This | vs | That |
|---|---|---|
| GDP: territory-based | vs | GNP / GNI: resident-based (GDP + NFIA) |
| Gross: depreciation included | vs | Net: depreciation deducted |
| Product taxes (GST, customs): per unit of product | vs | Production taxes (land revenue, stamp duty): on production as such |
| GVA at basic prices: sector-wise output | vs | GDP at market prices: headline aggregate |
| Nominal GDP: current prices | vs | Real GDP: base-year prices |
| Factor income from abroad (wages, interest, profit of residents) | vs | Remittances / transfers: not factor income, not in GNP |
Common Mistakes
- “GNP is always greater than GDP.” False. GNP > GDP only if NFIA is positive. For India NFIA is negative, so GNI is slightly below GDP.
- “National income means GDP.” In the strict sense, national income is NNP at factor cost, not GDP.
- “Remittances from Indians working abroad for years are part of India’s GNP.” False. Long-term workers abroad are residents of the host country; their remittances are transfers.
- “The GDP deflator includes imported goods.” False. It covers only domestically produced goods and services; CPI includes imported consumer goods.
- “Subsidies are added to move from market price to factor cost.” Only as part of net indirect taxes: factor cost = MP − indirect taxes + subsidies.
Practice
All questions below are original practice questions written in CGPSC style. They are not previous-year questions.
Level 1: Foundation
- GNP = GDP + ______.
- National income in the strict sense is NNP at ______.
- In January 2015, India’s sector-wise output began to be measured as GVA at ______ prices.
Answers
- Net factor income from abroad (NFIA).
- Factor cost.
- Basic prices.
Level 2: Prelims MCQs
Q1. Consider the following statements:
- If net factor income from abroad is negative, GNP will be less than GDP.
- In a closed economy, GDP and GNP are equal.
- Depreciation is the difference between GNP and GDP.
Which of the statements given above is/are correct?
- (a) 1 only
- (b) 1 and 2 only
- (c) 2 and 3 only
- (d) 1, 2 and 3
Answer and explanation
Q2. GDP at market prices is ₹500 crore, depreciation is ₹40 crore, net indirect taxes are ₹30 crore and NFIA is −₹10 crore. National income (NNP at factor cost) is:
- (a) ₹430 crore
- (b) ₹440 crore
- (c) ₹420 crore
- (d) ₹450 crore
Answer and explanation
Q3. Which one of the following is a production tax rather than a product tax in the national accounts?
- (a) Goods and Services Tax
- (b) Customs duty
- (c) Excise duty on petrol
- (d) Land revenue
Answer and explanation
Q4. Match List I with List II:
| List I | List II |
|---|---|
| A. GDP deflator | 1. GNP minus depreciation |
| B. NNP | 2. Personal income minus personal direct taxes |
| C. Personal disposable income | 3. Nominal GDP divided by real GDP, times 100 |
| D. NFIA | 4. Factor income earned by residents abroad minus factor income of non-residents at home |
- (a) A-1, B-3, C-2, D-4
- (b) A-3, B-2, C-1, D-4
- (c) A-3, B-1, C-4, D-2
- (d) A-3, B-1, C-2, D-4
Answer and explanation
Q5. In a year, nominal GDP grew by 9% and real GDP grew by 7%. The best approximate estimate of the rise in the GDP deflator is:
- (a) 2%
- (b) 7%
- (c) 9%
- (d) 16%
Answer and explanation
Level 3: Mains Answer Writing
Q1. (60 words) Distinguish between GDP and GNP. Why is India’s GNI lower than its GDP?
Model answer outline
- GDP: value of final output within the domestic territory, by residents and non-residents.
- GNP/GNI: output and income of normal residents, wherever produced = GDP + NFIA.
- India: NFIA is negative because outflows of interest, dividends and profits to foreign investors and lenders exceed the factor income Indian residents earn abroad. Hence GNI < GDP.
- One line: remittances are transfers, so they do not close this gap.
Q2. (150–200 words) “GDP is a measure of production, not of welfare.” Examine with reference to Chhattisgarh.
Model answer outline
- Intro: Define GDP and per capita income; note their use as headline indicators of growth.
- Body:
- Distribution: averages hide regional gaps, for example between the industrial Raipur–Durg–Bhilai belt and the tribal districts of Bastar and Surguja.
- Environmental cost: mining (coal in Korba, iron ore in Dantewada) and thermal power raise GSDP but cause land, water and air damage; the case for Green GDP.
- Non-market and informal work: unpaid care work and forest-based livelihoods (minor forest produce) are under-recorded.
- Composition and quality: spending that does not improve health or learning still adds to GDP.
- Complements: HDI, multidimensional poverty, PLFS employment data, SDG indices.
- Chhattisgarh angle: a large industry share of GSDP sits beside an agriculture-dependent workforce (see Sectors of the Economy).
- Conclusion: GDP is necessary but not sufficient; read it with distribution, environment and human development indicators.
Quick Revision Table
| Fact | Detail |
|---|---|
| GDP | Final goods and services within the domestic territory in a year |
| GNP / GNI | GDP + NFIA (resident-based) |
| NDP / NNP | GDP / GNP minus depreciation (CFC) |
| National income | NNP at factor cost |
| Factor cost | Market price − net indirect taxes |
| GVA at basic prices | GVA at FC + production taxes − production subsidies |
| GDP at MP | GVA at basic prices + product taxes − product subsidies |
| Switch to GVA at basic prices | January 2015, base year 2011–12 |
| New base year | 2022–23, series released 27 Feb 2026 |
| GDP deflator | Nominal GDP ÷ Real GDP × 100 |
| India 2025–26 (PE, 5 Jun 2026) | Real GDP growth 7.7%; nominal GDP about ₹346.36 lakh crore |
| India’s NFIA | Negative, so GNI < GDP |
Key Takeaways
- Domestic follows territory; national follows residents (+ NFIA).
- Gross includes depreciation; net excludes it.
- National income = NNP at factor cost; per capita income in India usually means per capita NNI.
- India measures sector output as GVA at basic prices and headline growth as real GDP at market prices; the base year moved from 2011–12 to 2022–23 in February 2026.
- GDP measures production, not welfare: read it with distribution and environmental indicators.
What’s Next
- Measurement of National Income: the product, income and expenditure methods, and how India’s NSO estimates GDP
- Sectors of the Economy: where India’s and Chhattisgarh’s output comes from
- Public Finance: taxes, subsidies and the budget behind “net indirect taxes”
- External Sector: remittances and factor incomes in the balance of payments