Measurement of National Income
Product, income and expenditure methods, what is included and excluded, India's NSO, base years (2011-12 to 2022-23) and Chhattisgarh's GSDP for CGPSC.
Prerequisites
- GDP, GNP and NNP: you need GDP, NFIA, depreciation, factor cost and basic prices before you can measure anything.
The Hook: Paddy from Mahasamund, Counted Once
A farmer in Mahasamund sells paddy worth ₹2,000 to a rice mill. The mill sells the rice to a kirana shop in Raipur for ₹3,200. The shop sells it to a family for ₹4,000.
Add up all three sales and you get ₹9,200. But only ₹4,000 worth of rice reached a final user. The other ₹5,200 is the same paddy counted again and again.
How does the National Statistics Office avoid this, and how does it add up the output of crores of farms, factories, shops and offices into one number called GDP?
Why it matters: “Which of the following is included in national income?” and “which method is used for which sector?” are classic Prelims items. History of national income estimation in India (Naoroji, V.K.R.V. Rao, Mahalanobis) is a favourite fact-question. Mains asks about the base-year revision and the reliability of GDP data.
The Circular Flow of Income (आय का चक्रीय प्रवाह)
graph LR
H["Households
(own land, labour,
capital, enterprise)"] -- "Factor services" --> F["Firms
(produce goods
and services)"]
F -- "Factor incomes:
wages, rent, interest, profit" --> H
F -- "Goods and services" --> H
H -- "Consumption spending" --> FIn this simple two-sector model, the same flow can be measured at three points:
- Production: the value added by firms
- Income: the factor incomes paid to households
- Expenditure: the spending on final goods and services
In principle all three give the same total:
$$\text{Value of output} \equiv \text{Factor incomes} \equiv \text{Final expenditure}$$Method 1: Product (Value Added) Method (उत्पाद / मूल्य वर्धन विधि)
Value added by each producer = value of output − intermediate consumption.
| Stage | Sale value | Intermediate input | Value added |
|---|---|---|---|
| Farmer (paddy) | ₹2,000 | ₹0 | ₹2,000 |
| Rice mill | ₹3,200 | ₹2,000 | ₹1,200 |
| Kirana shop | ₹4,000 | ₹3,200 | ₹800 |
| Total | ₹9,200 | ₹4,000 |
The sum of values added (₹4,000) equals the value of the final good. This is how double counting is avoided.
Steps:
- Classify producers into sectors (agriculture, mining, manufacturing, services and so on).
- Estimate GVA of each sector = output − intermediate consumption.
- Sum across sectors → GVA at basic prices; add net product taxes → GDP at market prices.
For simplicity we have ignored the farmer’s own inputs (seed, fertiliser) here; in the real accounts these are intermediate consumption and are subtracted.
Method 2: Income Method (आय विधि)
Add up the incomes earned by the factors of production:
| Component | Includes |
|---|---|
| Compensation of employees | Wages and salaries in cash and kind, employers’ contribution to social security |
| Operating surplus | Rent, interest and profit (dividends, corporate tax, retained earnings) |
| Mixed income of the self-employed | Income of farmers, shopkeepers, artisans and others where labour and capital income cannot be separated |
Add depreciation to get GDP at factor cost; add NFIA to move to national aggregates.
Mixed income matters a lot in India and Chhattisgarh, where most farmers and small traders are self-employed.
Method 3: Expenditure Method (व्यय विधि)
Add up spending on final goods and services:
$$\text{GDP}_{MP} = C + I + G + (X - M)$$| Symbol | Official name | Note |
|---|---|---|
| \( C \) | Private Final Consumption Expenditure (PFCE) | The largest component of India’s GDP, over half of it |
| \( G \) | Government Final Consumption Expenditure (GFCE) | Salaries, purchases of goods and services by government. Transfer payments such as pensions and scholarships are not included |
| \( I \) | Gross Capital Formation: Gross Fixed Capital Formation (GFCF) + change in stocks + valuables | GFCF (machinery, buildings, roads) is the main investment indicator |
| \( X - M \) | Net exports | Negative for India, which imports more goods and services than it exports |
In practice the three methods do not match exactly because the data come from different sources. The gap is shown as “discrepancies” in India’s expenditure-side tables.
What Is Included and What Is Not
| Included | Excluded |
|---|---|
| Imputed rent of owner-occupied houses | Transfer payments: old-age pensions, scholarships, unemployment allowance, gifts |
| Own-account production of goods: a farmer keeping part of his paddy for the family | Unpaid household services: cooking, cleaning, care by family members |
| Services of government employees (valued at cost) | Second-hand goods (already counted when first produced) |
| Brokerage / commission on second-hand sales and share trades | Purchase of shares and bonds (financial transfers, not production) |
| Change in inventories (stocks) | Capital gains, lottery and windfall winnings |
| Production for export | Intermediate goods (to avoid double counting) |
Which Method Does India Use?
India uses a combination of methods:
- The product (value added) method is used for the commodity-producing sectors such as agriculture, mining and manufacturing, where output data are available.
- The income method is used for many services, such as public administration, where output has no market price and is valued by the incomes paid.
- The expenditure method gives the demand-side break-up (PFCE, GFCF and so on) and serves as a cross-check.
Responsibility lies with the National Statistics Office (NSO, राष्ट्रीय सांख्यिकी कार्यालय) under the Ministry of Statistics and Programme Implementation (MoSPI). At the state level, the Directorate of Economics and Statistics of each state estimates Gross State Domestic Product (GSDP); Chhattisgarh’s DES also prepares district-level estimates.
Release cycle (each year’s GDP is estimated several times)
| Estimate | Typically released | Purpose |
|---|---|---|
| First Advance Estimates | Early January | Input for the Union Budget |
| Second Advance Estimates | End-February | Updated with more data |
| Provisional Estimates | End-May / early June | Released with the Q4 estimate |
| Revised Estimates | In the following years | Fuller data replace indicators |
| Quarterly estimates | About two months after each quarter | Track the business cycle |
For example, the Provisional Estimates for 2025–26 were released on 5 June 2026 and put real GDP growth at 7.7%.
History of National Income Estimation in India
timeline
title National income estimation in India
1867-68 : Dadabhai Naoroji's first estimate (about ₹20 per head)
1931-32 : V.K.R.V. Rao's estimates, the first on a systematic basis
1949 : National Income Committee (chair P.C. Mahalanobis)
1951 : Central Statistical Organisation (CSO) set up
2015 : 2011-12 base series; GVA at basic prices adopted
2019 : CSO and NSSO merged into the NSO
2026 : New series with base year 2022-23 (27 February)| Milestone | Detail |
|---|---|
| Dadabhai Naoroji | First estimate of India’s per capita income, about ₹20 for 1867–68, presented in Poverty and Un-British Rule in India (1901) to support his drain theory |
| Other pre-Independence attempts | William Digby, Findlay Shirras and others, with limited data |
| V.K.R.V. Rao | Estimates for 1931–32, regarded as the first on a scientific basis; divided the economy into sectors and combined the product and income methods |
| National Income Committee (1949) | Chaired by P.C. Mahalanobis, with D.R. Gadgil and V.K.R.V. Rao as members; laid the foundation of official estimates |
| CSO (1951) | Took over official national accounts |
| NSO (2019) | Formed by merging the CSO and the National Sample Survey Office (NSSO) within MoSPI |
Base years of India’s national accounts
1948–49 → 1960–61 → 1970–71 → 1980–81 → 1993–94 → 1999–2000 → 2004–05 → 2011–12 → 2022–23
The 2022–23 base-year revision (released 27 February 2026)
The new series replaced the 2011–12 base. The main changes reported by MoSPI:
- New data sources: administrative and high-frequency data such as GST records, the e-Vahan vehicle registration portal and the Public Financial Management System (PFMS).
- Double deflation for agriculture and manufacturing: both output and input prices are deflated to get real value added, replacing single deflation.
- Supply and Use Tables (SUT) integrated with the national accounts to narrow the gap between production-side and expenditure-side GDP.
- The economy’s structure changes: new products (digital services), new sectors, changes in relative prices.
- Better data become available (GST, new enterprise surveys).
- Methods improve in line with the UN System of National Accounts.
The usual advice is to revise roughly every five years, to a “normal” year without shocks. The 2011–12 base was in use for about eleven years; the pandemic years made an earlier revision difficult.
Chhattisgarh: Gross State Domestic Product (सकल राज्य घरेलू उत्पाद)
GSDP is the state-level equivalent of GDP: output produced within the state’s boundaries. Per capita income in state statistics means per capita Net State Domestic Product (NSDP) at current prices.
- GSDP at current prices: about ₹6.31 lakh crore in 2025–26, nominal growth about 11.57%.
- Real GSDP growth: about 8.11%.
- Per capita income: ₹1,79,244, up about 10.07% from ₹1,62,848 in 2024–25.
These are advance estimates; revised figures will follow. The sector-wise break-up is on Sectors of the Economy.
Problems in Measuring National Income in India (Mains)
- Large informal sector: unregistered enterprises do not keep accounts; their output is estimated from periodic surveys and indicators.
- Self-employment and mixed income: hard to separate labour income from capital income.
- Non-monetised transactions: barter and own consumption in rural and tribal areas, including collection of minor forest produce such as tendu leaves and mahua in Chhattisgarh.
- Unpaid work: household and care work is outside the production boundary.
- Data lags and revisions: advance estimates rely on partial data; base years get old.
- Deflation problems: the choice of price indices affects real growth; the move to double deflation in 2026 addresses part of this.
- Environmental costs not deducted: hence calls for Green GDP and natural resource accounting.
Memory Tricks
Don’t Confuse
| This | vs | That |
|---|---|---|
| Value added = output − intermediate consumption | vs | Value of output (includes inputs, double counts) |
| Compensation of employees (wages, salaries) | vs | Mixed income (self-employed, labour and capital income combined) |
| GFCE (government’s own consumption) | vs | Transfer payments (pensions, subsidies to households): not in GDP |
| Brokerage on a share sale: included | vs | Value of the share: excluded |
| National Income Committee 1949 (Mahalanobis) | vs | CSO 1951 (organisation) |
| GSDP: output within the state | vs | Per capita income (state): per capita NSDP |
Common Mistakes
- “Dadabhai Naoroji’s estimate was for 1931–32.” No: Naoroji’s was for 1867–68; V.K.R.V. Rao’s was for 1931–32.
- “The National Income Committee was chaired by V.K.R.V. Rao.” No: it was chaired by P.C. Mahalanobis; Rao and Gadgil were members.
- “Old-age pensions are part of GDP because the government spends money.” No: they are transfers. Government salaries for services rendered are included.
- “Purchase of a second-hand car is included.” Only the dealer’s commission is.
- “India’s latest base year is 2011–12.” It was replaced by 2022–23 on 27 February 2026.
- “Imputed rent of owner-occupied houses is excluded because no rent is paid.” It is included, to keep GDP comparable whether people own or rent.
Practice
All questions below are original practice questions written in CGPSC style. They are not previous-year questions.
Level 1: Foundation
- The first estimate of India’s per capita income, for 1867–68, was made by ______.
- In the expenditure method, GDP = C + I + G + ______.
- The National Statistics Office was formed in 2019 by merging the CSO and the ______.
Answers
- Dadabhai Naoroji (about ₹20 per head).
- (X − M), net exports.
- NSSO (National Sample Survey Office).
Level 2: Prelims MCQs
Q1. Which of the following are included while estimating national income?
- Imputed rent of owner-occupied houses
- Old-age pension paid by the government
- Commission earned by a broker on the sale of a used car
- Value of paddy retained by a farmer for family consumption
Select the correct answer using the code given below:
- (a) 1 and 2 only
- (b) 2 and 3 only
- (c) 1, 3 and 4 only
- (d) 1, 2, 3 and 4
Answer and explanation
Q2. Consider the following statements:
- The National Income Committee of 1949 was chaired by P.C. Mahalanobis.
- V.K.R.V. Rao estimated India’s national income for 1931–32.
- The new series of India’s national accounts with base year 2022–23 was released in February 2026.
Which of the statements given above is/are correct?
- (a) 1 and 2 only
- (b) 2 and 3 only
- (c) 1 only
- (d) 1, 2 and 3
Answer and explanation
Q3. In the income method, NDP at factor cost is the sum of:
- (a) Compensation of employees, operating surplus and mixed income
- (b) Consumption, investment and government expenditure
- (c) Wages, transfer payments and profits
- (d) Value of output and intermediate consumption
Answer and explanation
Q4. Match List I (Item) with List II (Treatment in national accounts):
| List I | List II |
|---|---|
| A. Salaries of government school teachers | 1. Excluded: financial transaction |
| B. Purchase of shares of a company | 2. Included in government final consumption expenditure |
| C. Iron ore used by a steel plant in the same year | 3. Part of gross fixed capital formation |
| D. A new machine bought by a cement factory | 4. Intermediate consumption, not counted separately |
- (a) A-2, B-1, C-3, D-4
- (b) A-2, B-1, C-4, D-3
- (c) A-1, B-2, C-4, D-3
- (d) A-3, B-1, C-4, D-2
Answer and explanation
Q5. Which of the following was not among the main changes in India’s 2022–23 base-year GDP series?
- (a) Use of GST and other administrative data
- (b) Double deflation in agriculture and manufacturing
- (c) Integration of Supply and Use Tables
- (d) Return to GDP at factor cost as the headline measure
Answer and explanation
Level 3: Mains Answer Writing
Q1. (60 words) Why is double counting a problem in national income accounting, and how does the value added method solve it?
Model answer outline
- Double counting: counting intermediate goods along with final goods inflates output (paddy → rice → retail example).
- Value added = output − intermediate consumption at each stage; the sum of values added equals the value of final goods.
- Hence GDP is measured as the sum of sectoral GVA, plus net product taxes.
Q2. (150–200 words) Discuss the rationale for revising the base year of GDP. What problems remain in measuring national income in India?
Model answer outline
- Intro: GDP at constant prices needs a base year; India moved from 2011–12 to 2022–23 on 27 February 2026.
- Rationale: structural change (digital services, formalisation through GST); new data (GST, e-Vahan, PFMS); better methods (double deflation, Supply and Use Tables); updated weights and prices.
- Remaining problems:
- Informal sector and mixed income estimated indirectly.
- Non-monetised and forest-based output in tribal regions.
- Unpaid care work outside the production boundary.
- Lags and large revisions between advance and final estimates.
- Environmental costs not deducted.
- Chhattisgarh angle: GSDP estimates by the state DES depend on the same national methods; minor forest produce and subsistence farming in Bastar and Surguja are hard to value.
- Conclusion: periodic revision, better administrative data and satellite accounts (environment, care work) improve reliability.
Quick Revision Table
| Fact | Detail |
|---|---|
| Three methods | Product (value added), income, expenditure |
| Income method | Compensation of employees + operating surplus + mixed income = NDP at FC |
| Expenditure method | C + I + G + (X − M) = GDP at MP |
| Largest expenditure component | PFCE (over half of GDP) |
| Excluded | Transfer payments, second-hand goods, shares and bonds, unpaid household work |
| Included | Imputed rent, own-account production of goods, brokerage |
| Naoroji | 1867–68; about ₹20 per head; Poverty and Un-British Rule in India (1901) |
| V.K.R.V. Rao | 1931–32; first systematic estimate |
| National Income Committee | 1949; P.C. Mahalanobis (chair), D.R. Gadgil, V.K.R.V. Rao |
| CSO / NSO | CSO 1951; NSO 2019 (CSO + NSSO) under MoSPI |
| Base years | 1948–49 … 2004–05, 2011–12, 2022–23 (released 27 Feb 2026) |
| New series changes | GST, e-Vahan, PFMS data; double deflation; Supply and Use Tables |
| Chhattisgarh 2025–26 (AE) | GSDP about ₹6.31 lakh crore; real growth about 8.11%; per capita income ₹1,79,244 |
Key Takeaways
- Output, income and expenditure are three views of the same circular flow.
- Value added avoids double counting; transfer payments and financial transactions are excluded.
- India combines methods: product method for goods sectors, income method for many services, expenditure method for the demand break-up.
- Remember the chain Naoroji (1867–68) → Rao (1931–32) → Mahalanobis Committee (1949) → CSO (1951) → NSO (2019).
- The current base year is 2022–23 (released 27 February 2026).
What’s Next
- Sectors of the Economy: the sector-wise composition of India’s GVA and Chhattisgarh’s GSDP
- Economic Planning and NITI Aayog: how growth targets were set using these accounts
- Economy, Budget and State Schemes of Chhattisgarh: the state budget and economic survey
- Data Interpretation: practise reading GDP and growth tables quickly