Explainer | How the Numbers Stack up for the Delimitation Bill in Parliament
New Delhi: The newly introduced Constitution (131st Amendment) Bill, 2026, which paves the way for a sweeping delimitation exercise and the expansion of the Lok Sabha, faces a crucial hurdle before it can become law. Because it seeks to alter the fundamental electoral architecture of the country, the legislation requires a constitutional amendment under Article 368.
This mandates a strict "double-lock" majority in both Houses of parliament: an absolute majority of the total membership, and a two-thirds majority of members present and voting.
Assuming a scenario where all members are present and voting – meaning no walkouts or abstentions – the floor management for the ruling National Democratic Alliance (NDA) becomes a complex numbers game. Here is a breakdown of where the math currently stands.
The Lok Sabha equation: The 66-vote deficit
In the Lower House, the ruling coalition easily crosses the halfway mark to form a government, but falls significantly short of the requisite constitutional supermajority in a full House.
Its effective strength, accounting for current vacancies is 540. The absolute majority mark is 271. The magic figure, i.e. two-thirds of the seats, is at 360.
With 294 members of its own, the ruling coalition is staring at a deficit of 66 votes. Even if the NDA’s floor managers successfully woo every single unaligned or "fence-sitter" member (12 votes), the tally only reaches 306. To bridge the final gap, the government would require massive cross-voting from the opposition INDIA bloc, a highly improbable scenario.
| Lok Sabha: Party-Wise Breakdown | |||
| Bloc | Party | Seats | Bloc Total |
| NDA | Bharatiya Janata Party (BJP) | 240 | 294 |
| Telugu Desam Party (TDP) | 16 | ||
| Janata Dal (United) [JD(U)] | 12 | ||
| Shiv Sena (SHS) | 7 | ||
| Lok Janshakti Party (Ram Vilas) | 5 | ||
| JD(S), Jan Suraaj Party (JSP), RLD | 2 each (6) | ||
| AD(S), AGP, AJSU, HAM(S), NCP, SKM | 1 each (6) | ||
| Aligned Independents | 2 | ||
| INDIA | Indian National Congress (INC) | 100 | 231 |
| Samajwadi Party (SP) | 37 | ||
| Trinamool Congress (AITC) | 28 | ||
| Dravida Munnetra Kazhagam (DMK) | 22 | ||
| Shiv Sena (UBT) | 9 | ||
| NCP (Sharad Pawar) | 8 | ||
| CPI(M), RJD | 4 each (8) | ||
| IUML, JMM | 3 each (6) | ||
| CPI, CPI(ML)L, JKNC, VCK | 2 each (8) | ||
| BAP, KEC, MDMK, RLP, RSP | 1 each (5) | ||
| Others | YSR Congress Party (YSRCP) | 4 | 15 |
| Aam Aadmi Party (AAP) | 3 | ||
| AD(WPD) | 2 | ||
| AIMIM, SAD, ASP(KR), UPPL, ZPM | 1 each (5) | ||
| Unaligned Independents | 1 | ||
The Rajya Sabha equation: The 23-vote gap
The arithmetic in the Upper House presents a slightly narrower gap but remains a steep climb for the treasury benches. While the NDA has consolidated its position following the recent biennial elections, it still relies heavily on friendly regional parties to clear constitutional amendments.
The total strength of the Upper House is 245. The absolute majority mark is at 123. The two-third majority mark is at 164.
Assuming full attendance, the NDA is exactly 23 votes short of the 164 mark. To push the bill through, the ruling dispensation cannot afford a single defection and must secure near-unanimous backing from the unaligned bloc of 29 MPs (which includes parties like the AAP, YSRCP, and BJD). While some of these parties have bailed the government out on crucial legislation in the past, their support on a bill that threatens to alter regional political weight is far from guaranteed.
| Rajya Sabha: Party-Wise Breakdown | |||
| Bloc | Party | Seats | Bloc Total |
| NDA | Bharatiya Janata Party (BJP) | 106 | 141 |
| Nominated Members (NOM) | 7 | ||
| AIADMK | 4 | ||
| JD(U), NCP | 4 each (8) | ||
| TDP, Shiv Sena (SHS) | 2 each (4) | ||
| AGP, JD(S), NPP, PMK, RLD, RLM, RPI(A), UPPL | 1 each (8) | ||
| Aligned Independents | 4 | ||
| INDIA | Indian National Congress (INC) | 29 | 73 |
| Trinamool Congress (AITC) | 13 | ||
| Dravida Munnetra Kazhagam (DMK) | 8 | ||
| Samajwadi Party (SP) | 4 | ||
| CPI(M), JKNC, RJD | 3 each (9) | ||
| CPI, IUML, JMM | 2 each (6) | ||
| KC(M), MDMK, NCP-SP, SS(UBT) | 1 each (4) | ||
| Others | Aam Aadmi Party (AAP) | 10 | 31 |
| YSR Congress Party (YSRCP) | 8 | ||
| Biju Janata Dal (BJD) | 8 | ||
| Bharat Rashtra Samithi (BRS) | 4 | ||
| Bahujan Samaj Party (BSP) | 1 | ||
If the opposition issues a strict whip and ensures 100% attendance to vote against the bill, the government mathematically cannot pass the 131st Amendment based on its current numerical strength. The ruling coalition's success hinges entirely on either engineering massive cross-voting or forcing a scenario where the opposition boycotts the proceedings, thereby artificially lowering the "present and voting" denominator required to hit the two-thirds mark.
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