Multiplier Effect

The idea

When the government spends a rupee, that rupee does not stop moving. It pays a contractor, who pays workers and suppliers, who in turn spend on goods and services, and so on. The fiscal multiplier is the ratio capturing this ripple: how much total GDP is ultimately generated per rupee of government spending or tax change, as the money re-circulates through the economy. A multiplier of 2 means ₹1 of spending eventually creates ₹2 of output.

Why India's capex push is built on this

Not all government spending has the same multiplier. Capital expenditure — building roads, ports and power lines — has a far higher multiplier than revenue spending like subsidies. Research from the NIPFP estimates an impact multiplier of around 2.45 for capital outlays, with cumulative effects building to nearly 4.8 over several years. RBI research reaches broadly similar conclusions. This is precisely why recent budgets have leaned so heavily on capex over giveaways.

The numbers are large. The FY26 capital-expenditure budget was set at about ₹11.21 lakh crore, roughly 3.1% of GDP, including ₹1.5 lakh crore in 50-year interest-free loans to states to fund their own capital projects — a deliberate way to push the multiplier down to the state level where much building actually happens.

A worked example

A new highway funded from that capex pays construction firms, which buy steel and cement and hire workers, who then spend their wages locally. With NIPFP's 2.45 multiplier, ₹1 of such capex eventually generates roughly ₹2.45 of GDP — far more bang per rupee than a one-off cash transfer that is largely saved or spent on imports.

Why it matters to investors

The multiplier explains the structural bet behind India's infrastructure story. High-multiplier capex spending tends to lift demand across cement, steel, capital goods, construction and logistics — sectors that benefit as the money ripples outward. When you read that the government is prioritising capex, the multiplier is the mechanism translating that budget line into broader growth, corporate orders and, ultimately, earnings.