Indian Economy

high importance~2 Q in Tier 16 formulas⚡ 20 shortcuts8 subtopics

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National income, growth and base years

⏱ 5 min read🧩 7 question types🎯 14 practice Q

The idea in one minute

National income measures how much a country produces in a year. The main measures are GDP, GNP and NNP, and each one adds or subtracts one item from the last. Real GDP uses fixed base-year prices, so it shows true growth. In 2026 MoSPI moved the GDP base year from 2011-12 to 2022-23.

The national income family

GDP counts what is produced inside India, by anyone. Other measures start from GDP and change one item at a time.

Measure	How to get it
GDP	Final goods and services made within India in a year
GNP	GDP + NFIA
NNP	GNP - depreciation
National income	NNP at factor cost
Per capita income	National income / population

NFIA means net factor income from abroad. It is what Indians earn abroad minus what foreigners earn here. Depreciation is the wear and tear of machines.

Example: GDP is ₹100 and NFIA is ₹5. So GNP is ₹105.

The chain to remember is GDP, then GNP, then NNP, then national income. NNP at factor cost is the textbook meaning of "national income".

Factor cost and market price

Market price is what buyers pay. Factor cost is what producers earn.

Rule: Market price = factor cost + indirect taxes - subsidies.

Indirect taxes raise the price. Subsidies hold it down. If factor cost is ₹900, taxes are ₹120 and subsidies are ₹20, market price is ₹1000.

Nominal and real GDP

Nominal GDP uses this year's prices. It can rise only because prices rose. Real GDP uses the prices of a fixed base year. It shows real production.

The link between them is the GDP deflator.

\text{Deflator} = \frac{\text{Nominal GDP}}{\text{Real GDP}} \times 100

Nominal GDP ₹330 and real GDP ₹300 give a deflator of 110. Prices are 10% above the base year.

Tip: To get real GDP, divide nominal GDP by (deflator / 100).

Three ways to measure

All three methods aim at the same total.

Income method: add wages, rent, interest and profit.
Expenditure method: add consumption, investment, government spending and net exports, written $C + I + G + (X-M)$ .
Product method: add the value added at each stage, so nothing is counted twice.

India now reports sectors as Gross Value Added (GVA) at basic prices. GDP equals GVA plus product taxes minus product subsidies. Estimates come in stages: advance, provisional, revised and final.

Three sectors and core industries

Sector	Examples
Primary	Agriculture, forestry, fishing, mining
Secondary	Manufacturing, construction, electricity
Tertiary (services)	Trade, transport, finance, IT, public administration

India is a services-led economy. Services give over half of GVA.

The eight core industries are coal, crude oil, natural gas, refinery products, fertilisers, steel, cement and electricity. They carry a large weight in the IIP.

Base years and who publishes

The NSO (National Statistical Office) works under MoSPI. It was formed in 2019 by merging the CSO and NSSO. The Economic Survey is different. The Department of Economic Affairs in the Finance Ministry issues it, a day before the Budget.

Indicator	Old base	New base
GDP	2011-12	2022-23 (27 Feb 2026)
CPI	2012	2024 (12 Feb 2026)
IIP	2011-12	2022-23 (from 1 Jun 2026)
WPI	2011-12	2022-23 (15 Jun 2026)

Watch: GDP and IIP use a financial-year base. CPI uses a calendar year, 2024.

Question types you will see

Each type: how to recognise it, the method step by step, and one question to try.

Type 1very common3 practice Q

GDP, GNP and NNP chains

How to spot it:

Words like 'GNP equals', 'national income means', or 'which is the widest measure'. Statement sets mix the four aggregates.

Method

Write the chain: GDP, +NFIA, GNP, -depreciation, NNP.
National income means NNP at factor cost.
Check each option against the chain.
Reject any option that says GDP includes NFIA.

Why it works:

Every option is a step in the same chain, so the chain settles it.

Try this

If GDP is ₹100 and net factor income from abroad is ₹5, GNP equals what?

Show solution

GNP = GDP + NFIA.
100 + 5 = 105.
Residents earn more abroad than foreigners earn here.

Answer

₹105

Type 2very common3 practice Q

Nominal and real GDP, the deflator

How to spot it:

Nominal and real GDP figures are given and the deflator is asked. Or two GDP concepts are compared.

Method

Divide nominal GDP by real GDP.
Multiply by 100.
For real GDP, divide nominal GDP by (deflator / 100).
Read the result as a price index with the base year at 100.

Why it works:

The deflator tells you how far prices have moved since the base year.

Try this

Nominal GDP is ₹330 lakh crore and real GDP is ₹300 lakh crore. What is the GDP deflator?

Show solution

330 / 300 = 1.1.
1.1 x 100 = 110.
Prices are 10% above the base year.

Answer

110

Type 3common2 practice Q

Base years and the new series

How to spot it:

'The new GDP series has which base year', 'the old base was', or 'who releases national accounts'.

Method

Recall old bases: GDP and IIP 2011-12, CPI 2012.
Recall new bases: GDP 2022-23, CPI 2024.
The release body is the NSO under MoSPI.
A base year is the year whose prices equal 100.

Why it works:

Base-year questions follow the 2026 revision, so learn both the old and new years.

Try this

India's national accounts statistics are released by which body?

Show solution

National accounts are official statistics.
The CSO and NSSO were merged in 2019.
The merged body works under MoSPI.

Answer

The National Statistical Office (NSO), under MoSPI

Type 4occasional2 practice Q

Per capita income and the methods

How to spot it:

'Per capita income is calculated from', 'the expenditure method adds', or 'which method uses wages, rent, interest, profit'.

Method

Per capita income = national income / population.
Wages, rent, interest, profit means the income method.
C + I + G + (X - M) means the expenditure method.
Value added at each stage means the product method.

Why it works:

Each method has its own list of items, so match the list to the name.

Try this

The expenditure method of measuring national income adds up what?

Show solution

Start with private consumption.
Add investment and government spending.
Add net exports, which is X - M.

Answer

C + I + G + (X - M)

Type 5occasional2 practice Q

Sectors, GVA and core industries

How to spot it:

'Which activity is tertiary', 'GVA is measured at which prices', or a list of the eight core industries.

Method

Sort the activity: farming and mining primary, factories secondary, services tertiary.
GVA is measured at basic prices.
GDP = GVA + product taxes - product subsidies.
Learn the eight core industries as one list.

Why it works:

The GVA link is a fixed formula and the sector lists are short.

Try this

Under the GVA framework, how is GDP obtained?

Show solution

GVA at basic prices is the starting point.
Add product taxes.
Subtract product subsidies.

Answer

GDP = GVA + product taxes - product subsidies

Type 6occasional

Factor cost to market price

How to spot it:

Factor cost, taxes and subsidies are given. Market price is asked.

Method

Write the bridge: MP = FC + indirect taxes - subsidies.
Add the taxes.
Subtract the subsidies.

Why it works:

The bridge always runs the same way, so one line settles it.

Try this

Factor cost is ₹900. Indirect taxes are ₹120 and subsidies are ₹20. What is market price?

Show solution

900 + 120 = 1020.
1020 - 20 = 1000.

Answer

₹1000

Type 7occasional

Recover real GDP from the deflator

How to spot it:

Nominal GDP and a deflator are given. Real GDP is asked.

Method

Divide the deflator by 100.
Divide nominal GDP by that number.

Why it works:

Real GDP strips out the price rise, so it must be smaller when the deflator is above 100.

Try this

Nominal GDP is ₹550 lakh crore and the deflator is 110. What is real GDP?

Show solution

110 / 100 = 1.1.
550 / 1.1 = 500.

Answer

₹500 lakh crore

Formula sheet

NNP

NNP = GNP - \text{Depreciation}

GNP already includes net factor income from abroad

GDP deflator

\text{Deflator} = \frac{\text{Nominal GDP}}{\text{Real GDP}} \times 100

divide nominal by (deflator/100) to get real

Market price bridge

MP = FC + \text{Indirect taxes} - \text{Subsidies}

moving between factor cost and market price

Shortcuts that save time

⚡ Territory, nation, net

GDP is about territory. Add NFIA to reach the nation (GNP). Subtract depreciation to reach net (NNP).

Example

Which measure subtracts depreciation?

Show solution

GDP is a gross measure.
GNP adds NFIA and is still gross.
NNP is GNP minus depreciation.

Answer

NNP (Net National Product).

⚡ New base-year pairs

Production series (GDP, IIP, WPI) use 2022-23. Consumer prices (CPI) use 2024.

Example

What is the new CPI base year?

Show solution

CPI tracks consumer prices.
The new series was launched in February 2026.
It replaced the 2012 base.

Answer

2024

Mistakes to avoid

Where most students lose marks on this subtopic.

Mistake 01

Calling GNP 'GDP minus NFIA'.

GNP is GDP plus NFIA.

Mistake 02

Quoting 2011-12 as the GDP base year.

Since 27 Feb 2026 the base is 2022-23.

Mistake 03

Thinking the Economic Survey comes from MoSPI.

It is a Finance Ministry (DEA) document.

Mistake 04

Using GDP divided by population as per capita income.

Exam definition: national income (NNP) divided by population.

Mistake 05

Adding subsidies when going from factor cost to market price.

Add indirect taxes and subtract subsidies.

Quick revision

Read this the night before the exam.

GDP is within India. GNP = GDP + NFIA. NNP = GNP - depreciation.
National income = NNP at factor cost.
Market price = factor cost + indirect taxes - subsidies.
Deflator = (nominal / real) x 100.
New bases: GDP, IIP, WPI 2022-23; CPI 2024.
NSO sits under MoSPI (CSO + NSSO merged in 2019).
Eight core industries: coal, crude oil, gas, refinery, fertilisers, steel, cement, electricity.

Practice: 14 questions

Sets of 10, mixed across the question types above. Every answer has a step-by-step explanation.

Topic test · 10 questions

Suggested time 4 min · wrong answers go to your mistake notebook automatically.

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