National Income: Aggregates and prices

MoSPI's press note on the 2022-23 series gives the bridge: GDP = Σ GVA at basic prices + product taxes - product subsidies. Product taxes such as GST, customs and excise are levied per unit of output, so they are not part of the basic price that producers receive; they are added once, for the economy as a whole, to move from basic prices to market prices. Production taxes less production subsidies (land revenue, stamp duty, input subsidies to farmers) are already inside GVA at basic prices, because they are paid on factors of production regardless of output. Subtracting consumption of fixed capital converts gross into net measures (GDP to NDP), and adding net primary income from abroad converts a domestic measure into a national one (GDP to GNI); neither turns GVA into GDP.

Nominal GDP is real GDP multiplied by the price level, and MoSPI defines the implicit price deflator as GDP at current prices divided by GDP at constant prices, times 100. So (1 + nominal growth) = (1 + real growth) × (1 + deflator inflation). Here 1.10 / 1.06 = 1.038, a real growth of about 3.8 per cent, which the usual approximation (10 - 6 = 4) rounds to about 4 per cent. Adding the two rates (16 per cent) has the relationship backwards, since price rise inflates nominal values and must be removed, not added. Six per cent is the price change, not the volume change, and 10 per cent is the nominal growth that still contains inflation. This is why MoSPI reports both nominal and real growth: in Q1 2026-27, for example, nominal growth exceeded real growth because the deflator rose.

GVA at factor cost is the sum of factor incomes and consumption of fixed capital. GVA at basic prices adds production taxes less production subsidies, which MoSPI defines as taxes or subsidies on land, labour or capital paid irrespective of the volume of output: 200 + 10 - 4 = 206. GDP then adds product taxes and subtracts product subsidies, which are levied per unit of output: 206 + 30 - 6 = 230. The option 206 and 236 forgets to subtract product subsidies; 194 and 218 reverses the sign of net production taxes; 230 and 254 treats product taxes as part of GVA at basic prices and then adds them again, double counting. This ladder (factor cost, then basic prices, then market prices) is the one India adopted in the 2015 revision and continues in the 2022-23 series.

MoSPI's 2015 note on changes in the new series lists, among the key changes, the valuation of GVA, NVA and related aggregates at basic prices and of GDP at market prices instead of factor cost, in line with SNA 2008. Before 2015, India's headline growth and sectoral estimates were at factor cost, which excludes all indirect taxes. Basic prices include production taxes less production subsidies (land revenue, stamp duty, input subsidies) but exclude product taxes and subsidies, which cannot be cleanly allocated to industries and are added only at the aggregate level to reach GDP. The 2022-23 series retains this framework: MoSPI still reports GVA at basic prices by industry and 'GDP' at market prices as the headline. NVA is a net concept and is not built at market prices by industry, and 'GDP at factor cost' was the old headline that was dropped.

MoSPI's Sources and Methods (September 2026) classifies taxes into three groups. A product tax is payable per unit of a good or service when it is produced, sold or imported; GST, excise, sales tax and customs are its examples. A production tax is any other tax that enterprises incur by engaging in production, payable on land, fixed assets or labour regardless of profitability; land revenue and stamp duties are cited. The third group, taxes on income and wealth, covers personal income tax, corporate income tax and taxes on financial or capital transactions; SNA treats these as current transfers recorded in the secondary distribution of income account, so they are not part of GVA or the GVA-GDP bridge. Statement 3 is therefore wrong; income taxes are a claim on income already earned, not a cost of production.

MoSPI's Sources and Methods (2026) defines a product subsidy as one payable per unit of a good or service, and names fertiliser subsidies and petroleum subsidies as examples; it also notes that fertiliser and electricity subsidies together form more than 75 per cent of product subsidies, with electricity subsidy moved forward using subsidised units consumed in each state. All three are therefore product subsidies, subtracted when moving from GVA at basic prices to GDP. A production subsidy is any other subsidy received because an enterprise engages in production, and MoSPI's own example is the subsidy on inputs provided to farmers; losses of departmental enterprises such as railways are also treated as production subsidies. Production subsidies are already netted within GVA at basic prices. Three of the four are product subsidies.

All three are taken from the definitions in MoSPI's Sources and Methods for the 2022-23 series. The basic price is what the producer actually keeps per unit: the amount receivable from the purchaser, less taxes and plus subsidies arising from its production or sale, and excluding transport invoiced separately. Statement 2 captures a subtle asymmetry: output is valued at basic prices, but intermediate consumption is valued at purchasers' prices, because that is what the producer actually pays for its inputs (including taxes and margins on them). The purchaser's price is the amount paid by the buyer to take delivery, excluding deductible VAT-type tax such as input-credit GST, and it includes transport charges the purchaser pays separately. Basic prices are thus the producer's view and purchasers' prices the user's view of the same transaction.

GST is a product tax: it sits between the basic price the producer keeps and the market price the buyer pays. A rate increase that leaves output and basic prices unchanged raises the product-tax term in GDP = Σ GVA at basic prices + product taxes - product subsidies, but leaves GVA at basic prices untouched; this is precisely why MoSPI treats GVA at basic prices as the better gauge of sectoral activity, while GDP growth can be swayed by tax collections and subsidy outgo. Statement 2 is correct: production taxes such as land revenue and stamp duties, net of production subsidies, are part of GVA at basic prices. Statement 3 reverses the logic: precisely because product taxes are not allocated to industries, the industry- wise GVA total falls short of GDP and must be topped up with net product taxes.

Tax collections are buoyant: they rise faster than GDP in good years and fall faster in slow years. So a falling tax-to-GDP ratio usually signals slowing growth (1 correct). Statement 2 is wrong because the ratio says nothing about how income is shared among people; that needs measures such as the Gini coefficient. The answer is (a).

India's combined tax-GDP ratio is around 17–18%, low compared with many developed economies, partly because of a large informal sector. Notice how GST and better compliance aim to widen the tax base without raising rates.

Answer as per the official UPSC answer key.

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Money value of final goods and services is correct per UPSC's key (d), though it is a simplified definition. National income is measured as the money value of all final goods and services produced in a year; counting only final goods avoids double counting of intermediate goods. Strictly, national income is Net National Product at factor cost, which also adds net factor income from abroad and subtracts depreciation, so (d) is the best of the options, not a perfect definition. (a) is partly right but vague. (b) is wrong: it leaves out government spending and net exports. (c) is wrong: personal income excludes retained profits and taxes.

Notice the update: India's GDP series is being moved to a 2022–23 base year. Trap: (b) misses two parts of C + I + G + (X − M).

Answer as per the official UPSC answer key.

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