Ranked-Choice Voting is a voting method in which voters rank candidates or, in some implementations, parties according to preference rather than selecting only one option. The phrase describes the ballot structure and can encompass different counting systems, so it should not automatically be treated as a synonym for one particular electoral formula. In an election using a single winner preferential method, ranked choices can be used to conduct an instant runoff by eliminating candidates and transferring ballots. Other ranked voting systems can use different mathematical procedures or can elect multiple representatives. International IDEA defines preferential voting broadly as systems in which voters rank parties or candidates on the ballot in order of choice.
The central feature of Ranked-Choice Voting is the ordering of preferences. A ballot might indicate first preference for one candidate, second preference for another, third preference for another, and so forth. The counting system determines what happens to those rankings. Under an Alternative Vote or Instant Runoff implementation, the first preferences are counted initially and later preferences are used when candidates are eliminated. Under another ranked system, preferences can be converted into numerical scores or used within a multi member transfer process. Consequently, ranked ballot and electoral system are not identical concepts. The same basic ability to rank candidates can be embedded within substantially different electoral mechanisms.
Ranked-Choice Voting is distinct from a simple plurality ballot because it records more information about the voters ordering of candidates. In a single choice plurality election, a voter normally expresses one selection and the counting procedure does not use a second or third preference. In a ranked ballot, subsequent preferences can become relevant if the first preference is eliminated or otherwise cannot contribute to the final determination. The practical significance therefore depends on the counting method. If the rules only use first preferences, later rankings have no electoral effect, whereas preferential systems deliberately incorporate those later choices into the result.
A common implementation is the Alternative Vote. In this arrangement, voters rank candidates and an absolute majority is required. If nobody obtains the required majority of first preferences, the lowest candidate is eliminated and ballots are transferred to the next available preference. This continues until one candidate reaches the majority threshold. International IDEA specifically defines the Alternative Vote in these terms and places it within the plurality or majority family. Thus, Ranked-Choice Voting can describe the ballot format while Alternative Vote describes a particular electoral implementation of that format.
Ranked-Choice Voting also encompasses arrangements that are proportional when used with multi member districts. Single Transferable Vote uses ranked preferences in multi member districts, with candidates reaching a specified quota being elected and subsequent counts transferring surplus votes and votes from eliminated candidates. Because multiple representatives are elected, the system can translate preferences into a proportional allocation of seats. This demonstrates why it is inaccurate to assume that every ranked choice system is a majoritarian single winner method. The electoral outcome depends on district magnitude, quota, transfer rules, and the number of representatives being elected.
Ballot completion rules are an important practical component of Ranked-Choice Voting. Some systems allow voters to rank as many candidates as they wish, while others require or encourage rankings to a particular number. If a ballot contains no further valid preference after its currently selected candidate is eliminated, it may become exhausted under the applicable rules. The treatment of incomplete rankings, duplicate rankings, skipped rankings, invalid marks, and ties can therefore affect the counting process. These are administrative and legal details rather than inherent properties of the general concept of ranking candidates.
Ranked-Choice Voting can influence how voters, candidates, and parties approach elections because a candidate may seek to become the first choice of some voters while also being an acceptable later choice for others. The existence of later preferences creates additional information about voter ordering that a single choice ballot does not contain. However, the strategic consequences vary according to the counting method and political environment. It is therefore preferable to distinguish the mechanical fact that voters rank candidates from broader claims about campaign behaviour or political outcomes.
Ranked-Choice Voting is best treated as a family or description of preferential ballot arrangements rather than as a single universal electoral system. It can be used in single winner elections such as the Alternative Vote or Instant Runoff Voting and in multi member proportional systems such as Single Transferable Vote. Its essential characteristic is the recording of ordered preferences. To understand the actual electoral consequences, it is necessary to identify the counting rule, winning threshold, district magnitude, transfer mechanism, and rules governing incomplete or exhausted ballots.
