Sweden is entering the final days of its 13 September election with two different signals pointing in the same direction: voters are engaging early, and the national race has become difficult to call.
The Swedish Election Authority said on 8 September that nearly 2.1 million people had already cast advance ballots. At the same point in the 2022 election, the figure was just under 1.6 million. That is a 32% increase.
The number does not tell us which side is winning. Sweden’s advance ballots are not a public opinion sample, and they are not counted as a political preference before the election result is produced. What the figure does show is that a very large share of the electorate has already moved from campaigning to voting.
That matters because the political contest has tightened at the same time.
A small polling gap with large consequences
Novus’s poll published on 7 September put the Social Democrats, Left Party, Centre Party and Greens at a combined 50.3%. The Moderates, Liberals, Christian Democrats and Sweden Democrats, the parties underpinning the current Tidö arrangement, were at 47.9%.
Novus says the 2.4-point difference is within the statistical margin of error. The Liberals were measured at 4.3%, just above Sweden’s 4% parliamentary threshold in the survey.
That threshold is one of the structural reasons the final result can differ sharply from a simple comparison of the two blocs’ vote shares. If a smaller party falls below 4%, its national representation changes dramatically and the distribution of seats among the parties that clear the threshold changes with it.
The final week is therefore not only about a marginal shift between left and right. It is also about whether every party needed for a viable governing majority makes it into parliament.
Early voting has become an institutional story too
The scale of advance voting has been accompanied by scrutiny of a technical registration error discovered earlier in September. The Election Authority initially estimated that about 4,000 voters might have been affected. After further analysis, it reduced the number of voters whose ballots were likely to remain unidentifiable to a maximum of 500, with the possibility that the figure will fall further.
The authority has said the problem was serious and is working to identify the locations and time periods concerned. The technical fault itself was stopped.
The correction is significant because it distinguishes the size of the original system anomaly from the much smaller number of votes that may ultimately be impossible to match correctly. In a close election, election administration becomes politically sensitive even when the number involved is tiny compared with the millions of votes being cast.
Three elections on one day
Swedes will vote on 13 September not only for the Riksdag but also for regional and municipal councils. Advance voting began on 26 August and remains available through election day.
The national contest inevitably dominates international attention, but the long voting period means local campaigns and national messaging overlap for almost three weeks. By the time party leaders reach their final rallies, millions of voters have already completed the act of voting.
That changes campaign strategy without revealing the outcome. Parties still need to mobilise supporters who have not voted, persuade late deciders and protect smaller coalition partners near the threshold. But they are doing so in an electorate where a growing proportion of ballots are already effectively beyond persuasion.
What the final days can still change
The unusually high early-vote figure should not be read as evidence for a particular coalition. Nor does the Novus poll forecast the result. Its significance is that the election is close enough for a modest movement in late preferences, turnout or the 4% threshold to alter the parliamentary arithmetic.
The next decisive information will come from the voters themselves after polls close on 13 September. Until then, Sweden offers a useful reminder that election dynamics are shaped by institutions as well as campaigns: when people vote, which parties cross legal thresholds and how accurately a large voting system processes millions of ballots can matter as much as the daily argument between party leaders.