Badminton scoring: the 30-point cap and the 2027 15-point system

Check the format before you start. The familiar 21-point game uses rally scoring, a two-point winning margin after 20–20, and a cap of 30. BWF has approved best-of-three games to 15 points from 4 January 2027. Domestic associations and casual events may use different transition dates, so the event regulations decide which format applies.

21-point games: deuce and the 30-point cap

The winner of every rally scores a point, regardless of who served. Normally you need at least 21 points and a two-point lead. At 29–29, the cap overrides the two-point margin: the next rally wins the game 30–29.

• 21–19 wins; 21–20 does not. Play can finish at 22–20.
• From 28–28, a player can win 30–28.
• From 29–29, the next point wins 30–29. You never play to 31.

The 15-point system from 4 January 2027

The new format remains best of three with a point awarded on every rally. It does not return to the old service-only scoring system. A game normally requires 15 points and a two-point lead; at 20–20, the next rally wins 21–20. The new format uses eight points for the mid-game interval and the change of ends in the deciding game.

In a 15-point game, 15–14 does not win, but 16–14 does. If play reaches 20–20, 21–20 wins because of the cap. Some associations have introduced the format early for domestic events; check the rules for your own competition rather than assuming every event changes on the same day.

Singles: use the server’s score

Serve from the right service court when your score is even and from the left when it is odd. Zero is even, so a game starts on the right. Use the server’s own score, not the receiver’s score or the sum of both scores. When the receiver wins a rally, add the point before deciding their next service court.

Doubles: track the point and the serving order

When the serving side wins a rally, the same player serves again and the partners switch service courts. When the receiving side wins, it scores and gains the serve. Gaining the serve does not itself mean the partners swap positions: the next server is the player in the court corresponding to the team’s new score.

1. Award the point to the rally winner.
2. If the serving team won, keep the same server and switch service courts.
3. If the receiving team won, use its new even or odd score to identify the service court.
4. Keep the serving order and positions alongside the score.

Before a casual match or tournament

• Agree on 21 or 15 points and the matching cap.
• Confirm best of three or an event-specific one-game format.
• Record singles or doubles and the first server.
• Check intervals, changes of ends, and dispute handling in the event regulations.

A worked doubles sequence

Suppose A and B play C and D, with A serving from the right court to C at 0–0. If A/B win, they lead 1–0. A and B exchange service courts, and A serves again, now from the left. C and D do not swap just because their opponents scored. If C/D win the next rally, the score becomes 1–1 and service passes to their player currently in the left service court. Regaining service does not mean the previous server must automatically hand the next serve to their partner.

Track game points, games won, and ends separately

Game points and games won belong on separate lines: 21–18 can finish the opening game while the match score becomes 1–0. Start the next game at 0–0 and retain the completed result. In best of three, two game wins finish the match. Under the familiar 21-point rules, change ends after each game and at 11 in the deciding game; the 15-point format uses eight for that deciding-game change. An end change keeps the current points and service sequence. It is not a new match.

A scorekeeper’s start, scoring, and correction routine

1. Before play, read out both names and confirm singles or doubles, games needed to win, target, cap, and first server.
2. After a decided rally, add one point to its winner, announce the score, and identify the next server. In doubles, keep a note of service-court positions rather than guessing a player from the team score alone.
3. Near game point, check both the margin and the cap. At the interval between games, record the result before starting the next game at zero.
4. If a tap is wrong, pause further updates and agree which side won the previous rally. Correct the confirmed score instead of clearing the whole match.