Runoff Elections Explainer
A runoff election is an additional election held when an earlier contest does not produce a winner under the applicable rules. It commonly narrows the field to two leading candidates and asks voters to choose between them. The trigger may be failure to reach a majority or another specified threshold. Runoffs can occur in nomination contests, general elections, or special elections, depending on the jurisdiction. They are a method for resolving an incomplete result, rather than a rule that automatically applies to every close race.
Consider a hypothetical three-candidate election in which the leading candidate receives 42 percent, the second receives 36 percent, and the third receives 22 percent. A plurality system could elect the 42-percent candidate. A system requiring a majority might instead send the leading two candidates to a runoff. Voters who supported the eliminated candidate can reconsider their choices, and candidates may try to attract that support. The second election starts a new vote under its own eligibility and timing rules; the first-round totals do not transfer automatically.
That new contest brings practical tradeoffs. Officials must prepare another ballot, staff voting sites, and communicate a new election schedule. Voters may need to participate twice, and the group that turns out for the runoff can differ from the first-round electorate. A runoff winner can earn a majority of the votes cast in that contest without receiving support from a majority of everyone who originally voted or everyone eligible to vote. The meaning of majority therefore depends on which election and which population are being counted.
Ranked-choice instant-runoff voting pursues a related goal using preferences collected on a single ballot, but it is not a second election. A conventional runoff allows new campaigning and a fresh choice after the first result becomes known. Supporters value that focused comparison; critics point to additional costs and uneven participation. To understand a particular runoff, check the threshold that triggered it, which candidates advance, and the rules for the second election. Those details matter more than assuming all two-round systems work alike.
A runoff is triggered by the governing election rule, not simply by a narrow margin between candidates.
Plurality selects the highest vote total; a majority rule can require a second contest if nobody passes its threshold.
The finalists seek a new decision from voters rather than carry first-round percentages into the second election.
Officials must communicate timing and eligibility clearly because runoff rules vary across jurisdictions.
A majority of runoff votes is different from a majority of all eligible voters or first-round participants.
A separate runoff permits a new campaign; instant-runoff counting uses preferences marked in the original election.
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