The Constitution (131st Amendment) Bill needed a two-thirds majority to pass. It didn't get one. Of 528 MPs present, 298 voted in favour, and 230 voted against, leaving the government 54 votes short. The companion Delimitation Bill was withdrawn the same day.
The Constitution (131st Amendment) Bill needed a two-thirds majority to pass. It didn't get one. Of 528 MPs present, 298 voted in favour, and 230 voted against, leaving the government 54 votes short. The companion Delimitation Bill was withdrawn the same day.
The BJP Government suggested that expansion would be "proportional" across the country, but the legislation never guaranteed that. Article 81(2)(a) of the Constitution mandates allocation by population, not by a uniform percentage increase per state. Those are two very different things.
Apply 2011 Census numbers to 850 seats, and the distribution looks nothing like a flat, everyone-gets-more scenario. Some states gain far more than their proportional share, while others lose ground they have held for decades.
The five states gaining the most seats are all in the Hindi Heartland. The five that lose the most are predominantly in the South and East. Which is the direct outcome of how the two regions have grown, or chosen not to grow, over the past half-century.
Northern states with higher population growth since 1971 would be the biggest beneficiaries of the Delimitation Bill. Uttar Pradesh would gain 13 seats more than it would under a proportional increase. Bihar would gain 10. Rajasthan would gain 8. That concentration of gains reshapes who holds leverage in any national coalition.
The five-decade freeze, pegged to the 1971 Census, was designed precisely to prevent this outcome. Its removal rewrites the rules of representation.
States in northern India, with their higher population growth since 1971, would be the primary beneficiaries of the new allocation.
Uttar Pradesh would gain 13 seats more than it would under a proportional increase. Bihar would gain 10, and Rajasthan 8. This concentration of gains would significantly amplify the region's influence in national politics.
That rewriting hits hardest in the states that spent decades doing what the national government asked. Tamil Nadu would lose 11 seats relative to a proportional share. Kerala would lose 8. These statistical abstractions represent a direct reduction in the number of voices those states have in the body that writes national law.
The uncomfortable truth the numbers surface is that both states are losing ground because they succeeded. Lower fertility, better education outcomes, stronger health infrastructure: all of it translated into slower population growth, which, under this formula, means fewer seats.
Even when you zoom out to the regional level, the pattern is cleaner still. The Hindi Heartland's share of the 850-seat house would rise by five percentage points, from 38.1% to 43.1%. The South's share would fall by 3.6 points, from 24.3% to 20.7%.
The North-East and Eastern regions would also shrink. Taken together, this is the largest single shift in India's federal power balance in half a century, and it flows entirely from a choice about which census year to use.
This is exactly the dynamic the 1971 freeze was built to contain. The concern then was that states with successful family planning programs would be punished in future delimitations for doing the right thing. Fifty years later, that concern is precisely what played out when the numbers were run.
That choice lands where it does because of decades of diverging fertility rates. The TFR data from NFHS-5 (2019-21) make clear that all five southern states have Total Fertility Rates between 1.5 and 1.8, well below the replacement level of 2.1.
Bihar is at 3.0. Meghalaya at 2.9. Uttar Pradesh at 2.4. The North has been growing faster, and under a population-proportional system, faster growth means more seats.
The constitutional mandate by the BJP government allocates seats by population, not by outcomes. There is no adjustment for literacy rates, infant mortality, or per capita income. A child born in a state with poor public health infrastructure counts the same as one born in a state that built schools and hospitals and invested in its people for generations.
States that made those investments will shrink as a share of parliamentary power, though that claim is contested. The Delimitation Bill mandated that seats be allocated in strict proportion to population, and under that formula, applied to 2011 Census numbers, the arithmetic does not hold. A uniform expansion and a population-proportional one produce very different maps. That gap, more than anything else, is what the opposition chose not to let through.
Data and analysis draw on the Census of India 2011, the National Family Health Survey (NFHS-5, 2019-21), and the Constitution (131st Amendment) Bill 2026 and Delimitation Bill 2026.
Seat gain/loss figures from The Hindu Data Team compare a proportional 850-seat allocation based on 2011 population against a uniform increase that preserves current state-wise seat shares.
Adapted from reporting by Srinivasan Ramani and Sambavi Parthasarathy for The Hindu.