Badminton Scoring Rules Explained: Rally Point System and Let Rules 2026

By Sarah Miller · May 26, 2026

The Rally Point System

Since 2006, all official badminton matches use the rally point scoring system, also known as the 3x21 system. Under this system, a point is scored on every rally, regardless of which side served. This replaced the old system where only the serving side could score, making matches faster and more exciting for both players and spectators.

A match consists of the best of three games. Each game is played to 21 points, and a side must win by at least 2 points. If the score reaches 20-20, play continues until one side leads by 2 points (for example, 22-20, 23-21, etc.). However, if the score reaches 29-29, the next point wins the game 30-29. This 30-point cap prevents games from going on indefinitely.

The rally point system has significantly reduced match duration compared to the old service-scoring system. The average match now lasts 40-60 minutes, compared to 60-90 minutes previously. This change was made partly to make badminton more television-friendly and to reduce the physical burden on players in tournaments with multiple rounds.

Service Rules in Singles and Doubles

In singles, the server serves from the right service court when their score is even (0, 2, 4...) and from the left service court when their score is odd (1, 3, 5...). The shuttle must be struck below the server's waist (defined as 1.15 meters from the court surface since 2018) and the racket head must be pointing downward at the moment of impact.

In doubles, only one player from each pair serves at a time. When the serving side wins a rally, the same server continues serving but switches service courts (right to left or vice versa). When the receiving side wins a rally, they become the new serving side. Unlike the old rules, there is no second server, meaning each pair gets only one serve before the serve passes to the opponents.

The service court in doubles is different from singles: the doubles service court is wider (using the outer sideline) but shorter (using the inner back service line, which is 0.76 meters in front of the back boundary line). After the serve, the full doubles court is in play. This creates an interesting tactical dynamic where the receiver must cover the wider court while the server tries to exploit the short service line.

Let Rules and Replay Situations

A let is called when a rally needs to be replayed without any point being awarded. Common let situations include: the shuttle getting caught in the net after passing over it (except on the serve), the shuttle disintegrating during play with the base completely separating from the feathers, a line judge being unsighted and the umpire unable to make a call, or an outside interference such as a shuttle from an adjacent court landing on your court during a rally.

When a let is called, the rally is replayed with the same server serving from the same service court. The score remains unchanged. Players should not stop playing until the umpire calls the let. If a player stops play on their own initiative claiming a let that the umpire did not call, the player may lose the rally.

In recreational play without an umpire, players should agree on let situations before starting. Common conventions include replaying the rally if both players are unsure about a line call, if there is genuine outside interference, or if the shuttle hits an overhead obstruction such as a ceiling or light fixture. Different venues may have specific house rules regarding overhead lets, so always check before playing.

Scoring for Beginners: A Simple Guide

If you are new to keeping score in badminton, here is a simple step-by-step approach. Before the match begins, determine who serves first through a coin toss or shuttle toss. The winner chooses either to serve or receive first, or which end of the court to start from. The loser gets the remaining choice.

During play, announce the score before each serve. The server's score is always announced first. For example, if the server has 5 points and the receiver has 3 points, announce 5-3. If you forget the score, try to recall the last rally and work backward. In official matches, the umpire keeps the score, and an electronic scoreboard is usually available for spectators.

Between games, there is a 120-second interval. Players switch ends of the court after each game. In the third game (deciding game), players switch ends when the leading score reaches 11 points. There is also a 60-second interval when the leading score in any game reaches 11 points, during which players may receive coaching and wipe their faces with a towel.