Class 12 Macroeconomics: National Income and Related Aggregates – Study Notes & Quiz

National Income – Complete Notes for Class 12 Economics

National Income Accounting is one of the most important units of Macroeconomics. Every government measures the total value of production, income and expenditure generated within an economy every year. These measurements help economists evaluate economic growth, compare countries, formulate policies and improve the standard of living.

This chapter introduces important macroeconomic aggregates such as GDP, GNP, NDP, NNP, National Income, Personal Income, Disposable Income and Real GDP. A clear understanding of these concepts forms the foundation for advanced topics like Income Determination, Government Budget and Balance of Payments.

Table of Contents

• 1. Concept of National Income
• 2. Domestic and National Concepts
• 3. Gross and Net Concepts
• 4. Market Price and Factor Cost
• 5. Aggregates Related to National Income
• 6. Nominal GDP and Real GDP
• 7. GDP and Welfare

Concept of National Income

Every country wants to know how much income it earns in one year. Just as a family calculates its annual income, a nation also calculates the income generated by all productive economic activities. This total income is known as National Income.

National Income is the money value of all final goods and services produced by the normal residents of a country during an accounting year.

Important Features of National Income

• Includes only final goods and services.
• Measured in monetary terms.
• Calculated for one accounting year.
• Includes production by normal residents.
• Avoids double counting.

Remember the five keywords: Final Goods • Monetary Value • One Year • Normal Residents • Productive Activities

Example

Suppose during one financial year India produces:

• Food grains worth ₹15 lakh crore
• Industrial goods worth ₹35 lakh crore
• Services worth ₹120 lakh crore

After removing double counting and making necessary adjustments, the total value obtained represents the National Income of India.

Why is National Income Measured?

National Income serves as the economic report card of a country. It helps governments, businesses and researchers analyse the performance of an economy.

Purpose	Importance
Economic Growth	Measures growth over time.
Policy Making	Helps government formulate fiscal and monetary policies.
Living Standards	Indicates improvement in people's income.
International Comparison	Compares economies of different countries.
Development Planning	Assists in resource allocation.

What is Included in National Income?

Included	Reason
Final Goods	Avoids double counting.
Services	Doctors, teachers, banks create value.
Production by Residents Abroad	Based on residency concept.
Imputed Rent of Owner Occupied Houses	Represents value of housing services.

What is Not Included?

Excluded	Reason
Intermediate Goods	Already included in final goods.
Transfer Payments	No current production.
Second-Hand Goods	Produced in previous years.
Sale of Shares and Bonds	Financial transactions.
Lottery Winnings	No productive activity.
Illegal Activities	Not included in official estimates.

Economic Activities Included in National Income

National Income = Money Value of Final Goods + Services Produced by Normal Residents During One Year

Quick Revision

• National Income measures annual production.
• Only final goods are included.
• Intermediate goods are excluded.
• Transfer payments are excluded.
• Financial transactions are excluded.
• Measured in monetary terms.
• Calculated for one accounting year.

Domestic and National Concepts of Income

One of the most confusing topics in National Income Accounting is the difference between Domestic and National concepts. Although both measure production and income, they differ in the basis on which income is calculated.

Domestic Concept is based on the geographical boundary of a country.

National Concept is based on the concept of normal residents of a country.

Memory Trick

• Domestic → Territory
• National → Residents

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Domestic Concept of Income

Under the domestic concept, all production taking place within the domestic territory of a country is included, irrespective of whether the producer is an Indian resident or a foreign resident.

Domestic Product is the money value of all final goods and services produced within the domestic territory of a country during an accounting year.

Examples

• Samsung manufacturing mobile phones in India.
• Hyundai producing cars in Chennai.
• Toyota manufacturing vehicles in Karnataka.
• A Japanese company operating a factory in India.

All these are included in India's Domestic Product because production occurs inside India.

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Domestic Territory

Domestic Territory refers to the geographical area under the economic control of a country's government where production activities take place.

Domestic Territory Includes

Included Areas	Explanation
Political Territory	Entire geographical boundaries of the country.
Territorial Waters	Water area extending up to 12 nautical miles.
Airspace	Airspace above the country's territory.
Ships and Aircraft	Indian ships and aircraft operating internationally.
Embassies and Consulates	Indian embassies located abroad.
Offshore Oil Rigs	Located in international waters but owned by India.

Foreign embassies located in India are considered part of the domestic territory of their own countries, not India.

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National Concept of Income

Unlike the domestic concept, the national concept is based on the normal residents of a country rather than the geographical location of production.

National Product is the money value of all final goods and services produced by the normal residents of a country during an accounting year, whether production takes place within the country or abroad.

Examples

• An Indian software engineer working permanently in Singapore.
• Tata Motors operating a factory in the United Kingdom.
• Infosys earning income through its overseas branches.

Since these producers are normal residents of India, their production forms part of India's National Product.

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Who is a Normal Resident?

A Normal Resident is a person or institution whose centre of economic interest lies in a country and who normally resides there for one year or more.

Normal Residents	Not Normal Residents
Indian companies operating abroad.	Foreign tourists visiting India.
Indian citizens working abroad for Indian embassies.	Foreign diplomats in India.
Government employees posted abroad.	International students staying temporarily.
Indian shipping companies.	Foreign business delegates.

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Difference Between Domestic and National Concepts

Basis	Domestic Concept	National Concept
Basis of Measurement	Geographical Territory	Normal Residents
Foreign Companies in India	Included	Excluded
Indian Companies Abroad	Excluded	Included
Main Aggregate	GDP	GNP
Focus	Place of Production	Ownership / Residency

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Net Factor Income from Abroad (NFIA)

The difference between Domestic Product and National Product arises because residents earn income from abroad while foreign residents earn income within the domestic territory.

Net Factor Income from Abroad (NFIA) = Factor Income Earned from Abroad − Factor Income Paid Abroad

NFIA = Income Received from Abroad − Income Paid Abroad

Components of NFIA

Income from Abroad	Income Paid Abroad
Wages earned by Indians abroad.	Wages paid to foreigners working in India.
Interest received from foreign investments.	Interest paid to foreign investors.
Profits earned by Indian companies abroad.	Profits earned by foreign companies in India.
Rent received from foreign properties.	Rent paid to foreign property owners.

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Relationship Between Domestic Product and National Product

National Product = Domestic Product + Net Factor Income from Abroad (NFIA)

Suppose

• GDP = ₹250 lakh crore
• Income earned by Indians abroad = ₹12 lakh crore
• Income earned by foreigners in India = ₹8 lakh crore

NFIA = ₹12 − ₹8 = ₹4 lakh crore Therefore, GNP = ₹250 + ₹4 = ₹254 lakh crore

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Concept Map

Quick Revision

• Domestic → Based on Territory.
• National → Based on Residents.
• GDP measures Domestic Product.
• GNP measures National Product.
• NFIA connects GDP and GNP.
• Foreign firms in India are included in GDP.
• Indian firms abroad are included in GNP.

Gross and Net Concepts of Domestic Product

While measuring National Income, economists distinguish between Gross and Net concepts. The difference arises because capital goods such as machines, buildings and equipment lose value due to continuous use. This reduction in value is called Depreciation or Consumption of Fixed Capital (CFC).

Gross Concept includes depreciation.

Net Concept excludes depreciation.

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What is Depreciation?

Machines, vehicles and buildings gradually wear out because of regular use, passage of time and technological obsolescence. This fall in value is called depreciation.

Depreciation (Consumption of Fixed Capital) is the reduction in the value of fixed assets due to normal wear and tear, accidental damage and obsolescence during an accounting year.

Causes of Depreciation

Cause	Example
Wear and Tear	Machine parts become old after continuous use.
Accidental Damage	Equipment damaged during production.
Obsolescence	Old computers replaced by modern technology.
Natural Deterioration	Buildings become weaker over time.

Suppose a textile mill purchases machinery worth ₹50 lakh. After one year, its value falls to ₹46 lakh. Depreciation = ₹4 lakh.

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Gross Domestic Product (GDP)

Gross Domestic Product (GDP) is the money value of all final goods and services produced within the domestic territory of a country during one accounting year before deducting depreciation.

GDP = Final Output Produced Within Domestic Territory

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Net Domestic Product (NDP)

Net Domestic Product is obtained after deducting depreciation from Gross Domestic Product.

NDP = GDP − Depreciation

Suppose

• GDP = ₹320 lakh crore
• Depreciation = ₹18 lakh crore

NDP = ₹320 − ₹18 = ₹302 lakh crore

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Difference Between Gross and Net Concepts

Basis	Gross	Net
Depreciation	Included	Excluded
Capital Consumption	Not deducted	Deducted
Value	Always Higher	Always Lower
Example	GDP	NDP

Memory Trick Gross → Before Depreciation Net → After Depreciation

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Formula Ladder

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Domestic Product at Market Price and Factor Cost

Goods and services are valued differently depending upon whose perspective is considered. Consumers purchase goods at the Market Price, whereas producers receive only the Factor Cost. The difference arises because of taxes and subsidies.

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Market Price (MP)

Market Price is the price actually paid by the buyer in the market.

Suppose Factory Price = ₹1,00,000 GST = ₹18,000 Subsidy = ₹5,000 Market Price = ₹1,00,000 + ₹18,000 − ₹5,000 = ₹1,13,000

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Factor Cost (FC)

Factor Cost is the amount actually received by factors of production for providing their services.

Factor Cost consists of

• Wages
• Rent
• Interest
• Profit

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Indirect Taxes

Indirect Taxes are taxes imposed by the government on production and sale of goods and services.

Examples

• GST
• Excise Duty
• Custom Duty
• Entertainment Tax

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Subsidies

Subsidies are financial assistance provided by the government to producers to reduce the cost of production.

Examples

• Fertilizer Subsidy
• Food Subsidy
• LPG Subsidy
• Electricity Subsidy

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Net Indirect Taxes (NIT)

Net Indirect Taxes = Indirect Taxes − Subsidies

NIT = IT − Subsidies

Indirect Taxes = ₹60 crore Subsidies = ₹15 crore Net Indirect Taxes = ₹45 crore

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Relationship Between Market Price and Factor Cost

Market Price = Factor Cost + Net Indirect Taxes

Factor Cost = Market Price − Net Indirect Taxes

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Formula Conversion Table

Conversion	Formula
FC → MP	Add Net Indirect Taxes
MP → FC	Subtract Net Indirect Taxes
NIT	Indirect Taxes − Subsidies

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Complete Conversion Diagram

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Quick Revision

• Gross includes depreciation.
• Net excludes depreciation.
• Market Price includes Net Indirect Taxes.
• Factor Cost excludes Net Indirect Taxes.
• Net Indirect Taxes = Indirect Taxes − Subsidies.
• GDP is generally measured at Market Price.
• National Income is measured at Factor Cost.

Aggregates Related to National Income

National Income Accounting uses several macroeconomic aggregates to measure production and income. These aggregates are interrelated and differ on the basis of three adjustments:

• Domestic or National Concept
• Gross or Net Concept
• Market Price or Factor Cost

Remember the sequence: Domestic → National Gross → Net Market Price → Factor Cost

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Major National Income Aggregates

Aggregate	Meaning
GDPMP	Gross Domestic Product at Market Price
NDPMP	Net Domestic Product at Market Price
NDPFC	Net Domestic Product at Factor Cost
GNPMP	Gross National Product at Market Price
NNPMP	Net National Product at Market Price
NNPFC	Net National Product at Factor Cost (National Income)

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1. Gross Domestic Product at Market Price (GDPMP)

GDPMP is the money value of all final goods and services produced within the domestic territory of a country during one accounting year before deducting depreciation and valued at market prices.

GDPMP

Characteristics

• Domestic Concept
• Gross Concept
• Market Price
• Most widely used economic indicator.

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2. Net Domestic Product at Market Price (NDPMP)

NDPMP is obtained after deducting depreciation from GDPMP.

NDPMP = GDPMP − Depreciation

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3. Net Domestic Product at Factor Cost (NDPFC)

NDPFC measures domestic production after deducting depreciation and Net Indirect Taxes.

NDPFC = NDPMP − Net Indirect Taxes

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4. Gross National Product at Market Price (GNPMP)

GNPMP measures production by the normal residents of a country before deducting depreciation.

GNPMP = GDPMP + NFIA

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5. Net National Product at Market Price (NNPMP)

NNPMP is obtained after deducting depreciation from GNPMP.

NNPMP = GNPMP − Depreciation

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6. Net National Product at Factor Cost (NNPFC)

NNPFC is called National Income. It measures the total factor income earned by the normal residents of a country during an accounting year.

NNPFC = National Income

NNPFC = NNPMP − Net Indirect Taxes

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Flow Diagram of National Income Aggregates

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Conversion Formula Chart

From	To	Adjustment
GDPMP	NDPMP	− Depreciation
NDPMP	NDPFC	− Net Indirect Taxes
GDPMP	GNPMP	+ NFIA
GNPMP	NNPMP	− Depreciation
NNPMP	NNPFC	− Net Indirect Taxes

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Personal Income (PI)

Personal Income is the total income actually received by households from all sources before payment of personal taxes.

PI = National Income − Undistributed Profits − Corporate Tax − Social Security Contributions + Transfer Payments

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Personal Disposable Income (PDI)

Personal Disposable Income is the income available with households after paying personal taxes.

PDI = Personal Income − Personal Taxes

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Private Income

Private Income is the total income earned by the private sector from all sources including factor income and transfer income.

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Per Capita Income

Per Capita Income represents the average income earned per person in a country.

Per Capita Income = National Income ÷ Population

Suppose National Income = ₹300 lakh crore Population = 150 crore Per Capita Income = ₹300 ÷ 150 = ₹2 lakh

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Relationship Among Aggregates

Aggregate	Formula
GDPMP	Domestic + Gross + Market Price
NDPMP	GDPMP − Depreciation
NDPFC	NDPMP − Net Indirect Taxes
GNPMP	GDPMP + NFIA
NNPMP	GNPMP − Depreciation
NNPFC	NNPMP − Net Indirect Taxes

Quick Revision

• GDP → Gross Domestic Production.
• GNP → Gross National Production.
• NDP = GDP − Depreciation.
• NNP = GNP − Depreciation.
• NNPFC = National Income.
• PI includes transfer income.
• PDI is available for spending and saving.
• Per Capita Income = National Income ÷ Population.

Nominal GDP and Real GDP

An increase in GDP does not always indicate an increase in production. Sometimes GDP rises simply because prices have increased due to inflation. Therefore, economists distinguish between Nominal GDP and Real GDP.

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Nominal GDP

Nominal GDP is the value of final goods and services produced during the current year measured at current year prices.

Nominal GDP = Current Year Output × Current Year Prices

Characteristics

• Uses current prices.
• Affected by inflation.
• May increase even when production remains unchanged.
• Also known as Current Price GDP.

Suppose India produces 100 smartphones. Price in 2025 = ₹20,000 Nominal GDP = 100 × ₹20,000 = ₹20,00,000

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Real GDP

Real GDP is the value of final goods and services produced during the current year measured at base year prices.

Real GDP = Current Year Output × Base Year Prices

Characteristics

• Uses constant prices.
• Removes the effect of inflation.
• Measures actual increase in production.
• Also known as Constant Price GDP.

Suppose Current Production = 100 smartphones Base Year Price = ₹15,000 Real GDP = 100 × ₹15,000 = ₹15,00,000

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Difference Between Nominal GDP and Real GDP

Basis	Nominal GDP	Real GDP
Prices Used	Current Prices	Base Year Prices
Inflation Effect	Included	Removed
Economic Growth	May be misleading	Shows actual growth
Another Name	Current Price GDP	Constant Price GDP

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GDP Deflator

GDP Deflator measures the change in prices of all domestically produced final goods and services.

GDP Deflator = (Nominal GDP ÷ Real GDP) × 100

Nominal GDP = ₹220 lakh crore Real GDP = ₹200 lakh crore GDP Deflator = 220 ÷ 200 × 100 = 110

If the GDP Deflator is greater than 100, prices have increased compared to the base year.

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Comparison Diagram

GDP and Welfare

Gross Domestic Product is one of the most commonly used indicators of economic performance. However, a higher GDP does not always imply higher welfare because GDP measures production rather than overall well-being.

Economic Welfare refers to the level of satisfaction, comfort and standard of living enjoyed by people.

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How GDP Improves Welfare

• Higher production creates employment.
• Higher income improves living standards.
• Greater tax revenue enables better public services.
• Increased investment promotes future growth.
• Better infrastructure enhances quality of life.

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Why GDP is Not a Perfect Measure of Welfare

Reason	Explanation
Income Inequality	GDP may rise while income remains concentrated among a few people.
Environmental Damage	Pollution reduces welfare but may increase GDP.
Non-Market Activities	Household work and voluntary services are excluded.
Leisure Time	GDP ignores work-life balance.
Quality of Life	Education, health and happiness are not directly measured.
Underground Economy	Illegal and informal production is often excluded.

A factory may increase GDP by producing more goods, but if it pollutes a nearby river, the health of local residents deteriorates. GDP increases, but welfare may actually decline.

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Green GDP

Green GDP is GDP adjusted for environmental degradation and depletion of natural resources.

Green GDP = GDP − Environmental Damage − Resource Depletion

Green GDP provides a more realistic measure of sustainable economic development.

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GDP vs Welfare

GDP	Welfare
Measures production.	Measures well-being.
Measured in money.	Includes qualitative aspects.
Ignores pollution.	Considers environmental quality.
Ignores income distribution.	Considers equity.
Economic Indicator.	Social Indicator.

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Quick Formula Sheet

GDP = Domestic Production

GNP = GDP + NFIA

NDP = GDP − Depreciation

NNP = GNP − Depreciation

National Income = NNPFC

NIT = Indirect Taxes − Subsidies

GDP Deflator = (Nominal GDP ÷ Real GDP) × 100

Per Capita Income = National Income ÷ Population

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50-Second Revision

• GDP measures Domestic Production.
• GNP measures National Production.
• NDP = GDP − Depreciation.
• NNP = GNP − Depreciation.
• NNPFC = National Income.
• Nominal GDP uses Current Prices.
• Real GDP uses Base Year Prices.
• GDP Deflator measures inflation.
• Higher GDP does not always mean higher welfare.
• Green GDP adjusts for environmental loss.

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Practice MCQs

1. National Income is equal to NNP at Factor Cost.
2. GDP is based on the Domestic Concept.
3. GNP differs from GDP because of NFIA.
4. Depreciation is also called Consumption of Fixed Capital.
5. Real GDP is calculated using Base Year Prices.
6. Nominal GDP is calculated using Current Prices.
7. GDP Deflator measures Price Changes.
8. Transfer Payments are Excluded from National Income.
9. Intermediate Goods are excluded to avoid Double Counting.
10. Green GDP accounts for Environmental Degradation.

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Conclusion

National Income Accounting provides a systematic framework for measuring the economic performance of a country. Concepts such as GDP, GNP, NDP, NNP, National Income, Nominal GDP, Real GDP and GDP Deflator help economists understand production, income generation and economic growth. However, GDP alone cannot fully represent the welfare of society because it ignores environmental sustainability, income distribution and quality of life. Therefore, modern economies increasingly focus on complementary indicators such as Green GDP and Human Development Index (HDI) to obtain a more comprehensive picture of development.

Economics with Akash Sir

CBSE Class 12 Economics | National Income Accounting | Macroeconomics