Badminton rotation becomes much easier when the score is treated as the starting information. The serving side's score selects right or left; the serving sequence identifies the player; and only a point won while serving makes doubles partners exchange their service-court relationship.
BWF Law 7 states that a match normally consists of the best of three games unless otherwise arranged. Each game is first to 21 points, subject to the extended-game rules at 20-all and 29-all.
The side winning each rally adds one point. A side wins the rally when the opponent commits a fault or when the shuttle ceases to be in play because it touches the court surface inside the opponent's court.
The side that wins a game serves first in the next game.
For both singles and doubles, look only at the serving side's current score. At 0, 2, 4, or another even score, service is delivered from the right service court. At 1, 3, 5, or another odd score, it is delivered from the left.
The receiver stands diagonally opposite in the corresponding service court. The receiving side's score does not choose the serving court.
In singles, if the server wins the rally, the server scores and serves again from the alternate service court because the score has changed parity. If the receiver wins, the receiver scores, becomes the new server, and serves from the court matching that player's new score.
Example under BWF Law 10: A serves from the right at 4–3 and loses the rally. B's score becomes 4, so B becomes server from the right court. The fact that A had been serving from the right does not control B's next position.
Standard singles uses the inner sidelines and the full back boundary line. The serve must travel diagonally into that long, narrow service court. During the rally, the same inner singles sidelines and back boundary define the playable court.
Because all BWF court lines form part of the area they define, a shuttle touching the relevant singles boundary is in.
If the serving side wins the rally, it scores; the same server serves again from the alternate service court, and the serving partners have consequently changed their respective service courts. The receiving pair does not swap.
If the receiving side wins the rally, it scores and becomes the serving side. Nobody changes service court merely because of that receiving-side win. The player already standing in the court selected by the new score becomes the server in accordance with the service sequence.
BWF Law 11.4 passes the right to serve from the initial server, to the partner of the initial receiver, to the partner of the initial server, to the initial receiver, and then back to the initial server. No player may serve or receive out of turn or receive two consecutive services in the same game, apart from a correction under Law 12 or a misconduct consequence.
This fixed sequence and the even/odd rule work together. Players do not need to memorise a separate rotation after every rally if they retain their side positions correctly.
This example follows the BWF Law 11 sequence; it is not a separate rotation rule.
In standard doubles, the serve uses the outer doubles sidelines but the long service line for doubles, which sits inside the back boundary. Once the serve is legally returned, the full doubles court extends to the outer sidelines and back boundary line.
A serve landing between the doubles long service line and the back boundary is therefore out even though the same landing would be in during the rally.
The player diagonally opposite the server is the receiver. Under BWF Law 13.2.3, it is a fault if the served shuttle is hit by the receiver's partner.
After the return of service, either player on a side may hit the shuttle, followed by either player on the opposing side, until the shuttle ceases to be in play. There is no requirement for partners to alternate racket contacts within their team.
Law 12 defines a service-court error as serving or receiving out of turn or from the wrong service court. When the mistake is discovered, it is corrected while the shuttle is not in play, and the existing score stands.
The law does not order a replay of all rallies completed before discovery. Officials restore the correct sequence for the next service rather than trying to unwind the match.
Players change ends after the first game, after the second if a third is required, and in the third game when a side first reaches 11. If an end change is missed, it is made when the shuttle is not in play and the existing score stands.
Under BWF Law 16, standard matches allow an interval not exceeding 60 seconds when the leading score reaches 11 in each game, and not exceeding 120 seconds between games. The focused guide to intervals, change of ends, and continuous play explains the timing, officiating calls, delay rules, and penalties.
The core Laws allow a match to be otherwise arranged through the relevant BWF alternative-law provisions. A school, club, development event, or experimental competition may therefore publish a shorter format.
Do not switch formats mid-match or assume a local scoring custom is the BWF baseline. State the governing body, effective document, and announced competition format before explaining the result.
Every standard scoring and rotation claim on this page uses the Badminton World Federation Laws of Badminton in force 26 April 2025, Version 5.0 (2), especially Laws 7, 8, 10, 11, 12, and 16. An authorised alternative scoring system, Para badminton provision, or competition regulation must be identified separately before it replaces any part of that baseline.