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Rules & officiating

Shot Clock

A countdown timer that limits how long a team may hold the ball before attempting a shot.

Rules & officiating

Definition

The shot clock forces the team in possession to attempt a shot that reaches the rim, or scores, within a fixed period — for example, 24 seconds in professional and international basketball — or lose possession. It was introduced to stop teams from holding the ball indefinitely to protect a lead, and it fundamentally shapes the pace of the game.

Versions of the shot clock appear in other sports, including lacrosse and water polo, and tennis uses a serve clock with a similar time-limiting purpose. In basketball the clock resets on a change of possession and, in many rulebooks, to a shorter period after an offensive rebound rather than the full duration.

Meaning by sport

This term is used differently across sports:

Basketball
A 24-second limit to attempt a shot, with defined reset rules after rebounds and possession changes.
water polo
A possession clock limiting how long a team may hold the ball before shooting.
Lacrosse
A clock requiring the attacking team to take a shot within a set time.

Where you’ll hear “shot clock

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