The SIR-Marred Turnout, How Electoral Roll Revision Skewed West Bengal’s Record Voter Participation
West Bengal, where the Assembly polls concluded on Wednesday, recorded a voter turnout of close to 92 per cent, the highest in the state’s electoral history according to provisional figures released by the Election Commission (EC). On its face, this is a remarkable achievement—a testament to the vibrancy of Bengal’s democracy and the enthusiasm of its citizens. However, as seen recently in Tamil Nadu, the record turnout was not driven by a sharp increase in voter participation, but by the low base effect of the Special Intensive Revision (SIR) of electoral rolls shrinking the size of the state’s electorate. The SIR exercise, which happened in a highly controversial manner in West Bengal, brought down the electorate by nearly 11 per cent from 7.66 crore to 6.82 crore. The number of people who voted increased only by 3.6 per cent, the lowest increase in voter participation in at least the last ten Assembly elections. This could indicate that many eligible voters who would have otherwise voted could not do so because of the SIR deletions. The record turnout is an illusion; the reality is a shrinking electorate and suppressed participation.
The Denominator Effect: How a Smaller Electorate Inflates Turnout Percentage
Voter turnout is calculated as a percentage: the number of people who voted divided by the total number of registered electors. If the denominator (the number of registered electors) shrinks, the percentage can rise even if the numerator (the number of people who voted) remains the same or increases only modestly. This is the “denominator effect.” In West Bengal, the SIR reduced the electorate by approximately 84 lakh voters (from 7.66 crore in 2021 to 6.82 crore in 2026). The number of people who voted increased by only 22 lakh (from 6.04 crore to 6.26 crore). The resulting turnout percentage jumped from 82.3 per cent to 91.8 per cent—a gain of 9.5 percentage points. But this gain is deceptive. The increase in actual voters was modest. The decline in registered electors was substantial.
The data in Table 1 tells the story clearly. In 2001, the electorate was 4.86 crore. By 2021, it had grown to 7.34 crore—a steady increase over two decades. In 2026, for the first time, the electorate shrank, falling to 6.82 crore, a decline of 7 per cent. The number of people who voted increased by only 3.6 per cent, the lowest increase in voter participation in at least the last ten Assembly elections. In previous election cycles, the increase in voters ranged from 7.7 per cent (2006) to 20.2 per cent (2011). The sharp drop in 2026 is unusual and concerning.
The SIR Controversy: A Deeply Flawed Revision Process
The SIR exercise, which happened in a highly controversial manner in West Bengal, brought down the electorate by nearly 11 per cent from 7.66 crore to 6.82 crore. The scale of deletion is unprecedented. The last SIR happened after the 2001 Assembly polls, which resulted in the electorate declining in size by 1 per cent during the 2006 election. The 2026 SIR resulted in a 7 per cent decline. The process was marked by allegations of bias, lack of transparency, and denial of natural justice. Voters were deleted for “logical discrepancies” without proper notice. Appeals were filed, but few were resolved before the election. The Supreme Court’s tribunals were overwhelmed. The result was mass disenfranchisement.
A constituency-wise analysis shows that 242 of the 294 constituencies saw an increase in the number of people who voted in the latest polls, compared to the 2021 Assembly election. But this increase must be understood against the backdrop of the SIR. In many constituencies, the increase in voters was modest, while the decline in electors was significant. The constituencies with the highest turnout increases were often those with the highest deletion rates.
High Deletion Constituencies: The Turnout Paradox
Table 3 provides a stark illustration. In Chowrangee, deletions were 40 per cent. Voter turnout jumped from 53.55 per cent in 2021 to 86.5 per cent in 2026—a difference of 33 percentage points. In Jorasanko, deletions were 38 per cent. Turnout jumped from 49.99 per cent to 86.5 per cent—a difference of 36.5 percentage points. In Samserganj, deletions were 36 per cent. Turnout jumped from 80.05 per cent to 96.0 per cent—a difference of 16 percentage points. In constituencies with low deletions (1-2 per cent), the turnout increase was modest: 2.5 to 4.6 percentage points. In Mahishadal, with 2 per cent deletions, turnout actually declined slightly (from 89.44 per cent to 89.3 per cent).
The pattern is clear: constituencies with high deletion rates saw dramatic increases in reported turnout. This is not because more people voted. It is because the denominator was artificially reduced. Voters who were deleted are not counted in the electorate, so they cannot be counted as non-voters. The turnout percentage rises, even if the actual number of voters remains flat.
Regional Disparities: Where Did Participation Increase?
Table 4 provides a regional breakdown of constituencies based on whether they saw an increase or decrease in the number of voters between 2021 and 2026. In Greater Kolkata (42 constituencies), 28 saw an increase, 14 saw a decrease. In the North region (54 constituencies), 48 saw an increase, 6 saw a decrease. In the South East region (81 constituencies), 55 saw an increase, 26 saw a decrease. In the South West region (117 constituencies), 111 saw an increase, 6 saw a decrease.
Map 2 shows that the constituencies which had an increase in the number of voters in the 2026 polls were concentrated more in the northern and south-western regions. Constituencies such as Chandlai, Domkal, and Sitalkuchi registered higher than the average increase. The southern region, closer to Kolkata, saw a more mixed pattern. The reasons for these regional disparities are not analysed in the data, but they may reflect differences in the intensity of the SIR deletions, differences in population mobility, or differences in political mobilisation.
The Missing Voters: What Happened to the 84 Lakh?
The most troubling question is: what happened to the 84 lakh voters who were deleted from the electoral roll? Some may have died. Some may have moved away. Some may have been duplicates. But it is unlikely that 11 per cent of the electorate died or moved in a five-year period. The natural attrition rate is much lower. The evidence suggests that many of the deleted voters were eligible citizens who were disenfranchised by an opaque and flawed process.
The SIR required voters to produce documents linking them to the 2002 electoral roll. Many could not. The elderly, the poor, the illiterate, the migrants—those with limited documentation—were disproportionately affected. The process favoured those with stable addresses, permanent jobs, and access to archives. It penalised the mobile, the informal, and the marginalised.
The Political Implications: A Tainted Mandate?
The SIR controversy has cast a shadow over the election results. If the electoral roll was manipulated, the mandate is tainted. The party that benefits from the deletions—the BJP, which has long demanded a “clean” voter list—cannot claim a legitimate victory. The party that suffers—the Trinamool Congress—cannot accept the results as fair. The Election Commission, which oversaw the process, cannot claim neutrality.
The Supreme Court, which approved the SIR and set up tribunals, must answer for the consequences. The tribunals were ineffective. Only a tiny fraction of appeals were resolved before the election. The vast majority of deleted voters never got their names back. The right to vote is a fundamental right, essential to democracy. When that right is taken away by administrative fiat, by a flawed software check, by an overloaded tribunal, the democratic process is damaged.
Conclusion: A Record That Is Not What It Seems
West Bengal’s 92 per cent voter turnout is a headline, not a reality. The record was achieved not by a surge in voter enthusiasm but by a shrinkage in the electorate. The SIR deleted 84 lakh voters. The increase in actual voters was only 22 lakh. The turnout percentage rose because the denominator fell, not because the numerator rose significantly.
This is not to deny that many citizens voted enthusiastically. They did. The 6.26 crore voters who cast their ballots deserve credit for participating. But the 84 lakh who were deleted also deserve credit—for existing, for being citizens, for having the right to vote. They were denied that right. Their absence from the rolls is a stain on the election.
The Election Commission must explain the SIR deletions. The Supreme Court must review the process. The government must restore the deleted voters. And the public must demand accountability. A record turnout achieved by shrinking the electorate is not a cause for celebration. It is a cause for concern.
Q&A: West Bengal’s SIR-Marred Turnout
Q1: What was the reported voter turnout in West Bengal’s 2026 Assembly elections, and why is it misleading?
A1: The reported voter turnout was close to 92 per cent, the highest in the state’s electoral history. However, the article argues that this record is misleading because it was driven by the “denominator effect” —the Special Intensive Revision (SIR) of electoral rolls shrank the electorate by nearly 11 per cent from 7.66 crore to 6.82 crore. Voter turnout is calculated as (people who voted) divided by (total registered electors). When the denominator shrinks, the percentage rises even if the numerator increases only modestly. The number of people who voted increased by only 3.6 per cent (from 6.04 crore to 6.26 crore), the “lowest increase in voter participation in at least the last ten Assembly elections.” The turnout percentage jumped from 82.3 per cent to 91.8 per cent—a gain of 9.5 percentage points—but this gain is “deceptive.”
Q2: What is the “denominator effect,” and how did it inflate West Bengal’s turnout figures?
A2: The denominator effect occurs when the number of registered electors (denominator) shrinks, causing the turnout percentage to rise even if the number of actual voters (numerator) increases only modestly or remains flat. In West Bengal, the SIR reduced the electorate by approximately 84 lakh voters (from 7.66 crore in 2021 to 6.82 crore in 2026). The number of people who voted increased by only 22 lakh (from 6.04 crore to 6.26 crore). The turnout percentage jumped from 82.3 per cent to 91.8 per cent. The article notes: “The record turnout is an illusion; the reality is a shrinking electorate and suppressed participation.”
Q3: What does Table 3 reveal about the relationship between deletion rates and turnout increases?
A3: Table 3 compares constituencies with high deletion rates and low deletion rates:
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High deletion constituencies: Chowrangee (40% deletions) saw turnout jump from 53.55% to 86.5% (+33 points); Jorasanko (38% deletions) saw turnout jump from 49.99% to 86.5% (+36.5 points); Samserganj (36% deletions) saw turnout jump from 80.05% to 96.0% (+16 points).
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Low deletion constituencies (1-2% deletions): Katulpur saw turnout increase by only 2.5 points; Bhagabanpur by 4.6 points; Sabang by 3.4 points; Patashpur by 3.9 points; Mahishadal saw turnout decline by 0.2 points.
The pattern is clear: “constituencies with high deletion rates saw dramatic increases in reported turnout. This is not because more people voted. It is because the denominator was artificially reduced.”
Q4: What does the article identify as the likely cause of the electorate shrinkage?
A4: The article identifies the Special Intensive Revision (SIR) of electoral rolls, which “happened in a highly controversial manner in West Bengal.” The SIR required voters to produce documents linking them to the 2002 electoral roll. Many could not. The elderly, the poor, the illiterate, and migrants were “disproportionately affected.” The process favoured those with “stable addresses, permanent jobs, and access to archives. It penalised the mobile, the informal, and the marginalised.” The article notes that natural attrition (deaths, migration) cannot explain an 11 per cent decline in five years. The SIR was “opaque and flawed.”
Q5: What are the political and democratic implications of the SIR deletions?
A5: The article argues that the SIR controversy has “cast a shadow over the election results.” If the electoral roll was manipulated, “the mandate is tainted.” The party that benefits from the deletions cannot claim a legitimate victory; the party that suffers cannot accept the results as fair; the Election Commission cannot claim neutrality. The right to vote is “a fundamental right, essential to democracy.” When that right is taken away by “administrative fiat, by a flawed software check, by an overloaded tribunal, the democratic process is damaged.” The article calls for the Election Commission to “explain the SIR deletions,” the Supreme Court to “review the process,” the government to “restore the deleted voters,” and the public to “demand accountability.” The article concludes: “A record turnout achieved by shrinking the electorate is not a cause for celebration. It is a cause for concern.” The 84 lakh deleted voters “also deserve credit—for existing, for being citizens, for having the right to vote. They were denied that right. Their absence from the rolls is a stain on the election.”
