Sweden’s main party blocs were virtually even after Sunday’s parliamentary election, according to projections drawn from a partial count. The national election authority indicated that the left-wing opposition could finish with a one-seat majority. That margin, if it holds, would be among the narrowest possible outcomes in the 349-member Riksdag.

Remaining ballots, including votes cast abroad and those still being processed, can still change the seat map. Sweden’s proportional system translates small shifts in the popular vote into individual seats, which matters when the two blocs are this close. A fuller official picture typically emerges only after those later counts are complete.

Even a one-seat majority would leave little room for error. Swedish governments often depend on formal or informal support from more than one party, and a razor-thin edge can be undone by absences or disagreements over a speaker and a prime minister. The opposition would still need to settle on a governing program if it seeks to take office.

A one-seat advantage would not, by itself, guarantee a stable government.

The projection is an early indication, not a certified result. Parties on both sides have reason to wait for the completed tally before claiming a mandate. Until the election authority publishes final figures, neither bloc can be sure it commands 175 seats.

Close Swedish elections have in the past taken days to resolve as remaining votes are added. The immediate question in Stockholm is whether either side can assemble a working majority and hold it. Coalition talks, if they begin, are likely to be shaped as much by the final seat count as by Sunday’s projections.