The play clock is set to 40 seconds immediately after a play ends (unless it follows one of these scenarios). If the ball is not snapped before the play clock expires, it is a delay of game.

NFL Play Clock The play clock in the NFL runs for 40 seconds in most situations. The referee will spot the ball on the field and the clock will begin to run immediately. After certain administrative stoppages, such as a timeout or the end of a quarter, the play clock will be wound to only 25 seconds.

The play clock is a visible timer displayed above the field counting down time before the next play must start. In the NFL and NCAA, teams have 40 seconds from the end of the previous play to snap the next play. High school rules mandate a 25 second play clock. The play clock ensures the game keeps moving and discourages delay tactics.

The play clock ensures that each offensive play starts promptly: Standard Play Clock: Lasts 40 seconds after the prior play ends. After Stoppages: Lasts 25 seconds after certain stoppages like timeouts.