NFL Clock Rules: When the Game Clock Stops and Starts (2026)

NFL clock rules come down to one question: after each play, does the game clock keep running, or does it stop until the next snap? It stops for an incomplete pass, the ball going out of bounds, a score, a penalty, a change of possession, a timeout and the two-minute warning. It keeps running after a run or a catch that ends in bounds, and it does not stop just because a team makes a first down. Late in each half the restart rules get stricter, which is why the final two minutes take so long to play.

This page explains the rules that decide every final drive, in plain words, with the rulebook section for each one. If you want to try them out, the NFL daily game hands you a real 4th-quarter drive every day and lets you call the plays yourself.

Source. Everything here comes from Rule 4 (Game Timing) and Rule 8, Section 2 of the 2026 NFL Rulebook, as published on the NFL Football Operations site and read on October 23, 2026. We are a fan-made site, not affiliated with the NFL. The rulebook has exceptions we leave out here; check it when a call matters.

When the game clock stops

The clock operator stops the game clock (Rule 4-4) at the end of a play when:

• a forward pass is incomplete
• the ball or the runner goes out of bounds
• the ball is dead on or behind a goal line, which covers touchdowns, safeties and touchbacks
• there is a change of possession (an interception, a fumble recovery, a turnover on downs)
• a foul happens during the play
• there is a free kick (a kickoff) or a fair-catch kick
• the referee signals the two-minute warning
• any official calls a timeout, including a team timeout, an injury timeout, or a referee's timeout to measure for a first down

A first down is not on that list. The clock keeps running after a first down unless one of the reasons above also applies. If the officials bring out the chains to measure, the referee stops the clock for the measurement and then restarts it as if nothing had happened.

When the clock starts again

Stopping is only half of it. What really matters late in a game is when the clock restarts: on the referee's ready-for-play signal, while the offense is still lining up, or not until the ball is snapped.

The out-of-bounds row is the one that surprises people. Early in a game, a runner stepping out barely slows things down: the clock starts again as soon as the ball is spotted. With under five minutes left in the 4th quarter, the same play stops the clock until the next snap, which is why trailing teams throw to the sideline.

One more detail from Rule 4-3: in the 4th quarter, if the offense commits a foul after the ball is ready for play and that stops the clock before the snap (a false start, for example), the clock restarts on the snap. After the two-minute warning, stopping the clock that way also costs a 10-second runoff, explained below.

The play clock: 40 or 25 seconds

The play clock is the countdown between plays, separate from the game clock. The offense must snap the ball before it hits zero or take a 5-yard delay of game penalty (Rule 4-6).

• 40 seconds is the normal interval. It starts the moment the previous play ends.
• 25 seconds applies after administrative stoppages, starting with the referee's whistle. These include a change of possession, a charged team timeout, the two-minute warning, the end of a quarter and a penalty enforcement.

The 40-second clock is what makes clock management possible. When the game clock is running after a play that ended in bounds, the offense can take most of those 40 seconds before it snaps, and every second comes off the game clock. A team trying to save time does the opposite and snaps as fast as it can line up.

The two-minute warning

The two-minute warning is an automatic timeout at the end of the 2nd and 4th quarters (Rule 3-41). It comes after the last play that was snapped with more than 2:00 on the clock. If a play is still going when the clock passes 2:00, the warning comes when that play ends.

Afterward the offense gets a 25-second play clock and the game clock starts on the snap. For the team with the ball, it works like a free timeout. That is why a trailing team with the ball at 2:20 often wants to run one more play before the warning, and a leading team tries to run the clock down to it.

Timeouts

Each team gets three timeouts per half (Rule 4-5). Unused first-half timeouts are lost at halftime, and in regular-season overtime each team gets two. A team cannot be granted two timeouts in a row during the same dead-ball period (that is a 5-yard delay of game), and officials ignore a request for a fourth timeout in a half.

Injuries also cost time late in a half. After the two-minute warning, an injury timeout is charged to the injured player's team if it still has timeouts, unless the injury came from an opponent's foul. If that team has none left, it gets an excess timeout. The first one carries no yardage penalty, but if the team has the ball and the clock was running, the defense can take a 10-second runoff.

The 10-second runoff

The runoff stops the offense from saving time illegally (Rule 4-7). After the two-minute warning of either half, the offense cannot stop a running clock by:

• committing a foul while the ball is dead, such as a false start
• throwing an illegal forward pass, or intentionally grounding the ball
• throwing a backward pass out of bounds
• spiking or throwing the ball after the play is over
• illegally batting or kicking the ball out of bounds

When it does while the clock is running, the officials take 10 seconds off the game clock, set the play clock to 30 seconds and start the game clock on the ready signal. If the offense still has a timeout, it can use it instead of taking the runoff. The defense can also decline the yardage penalty, which declines the runoff with it. A half can end on a 10-second runoff, and there is never a runoff against the defense.

The rule also covers some fouls by the defense. If the defense commits one in the last 40 seconds of a half while the clock is running, the half can end right there unless the defense still has a timeout or the offense chooses otherwise.

Spiking the ball and kneeling down

A spike is legal intentional grounding (Rule 8-2). The quarterback has to be lined up no more than one yard behind the center, take the snap and, in one continuous motion, throw the ball straight into the ground. It counts as an incomplete pass, so the clock stops, but it uses up a down. That is why you rarely see a spike on 3rd down and never on 4th. A quarterback in shotgun cannot spike legally, and neither can one who delays before throwing it down.

A kneel-down is the opposite. The quarterback takes the snap and drops to a knee, the ball is dead, and since nothing stops the clock, the next 40-second play clock runs off the game clock too. If the defense is out of timeouts, every kneel-down can take roughly 40 seconds off, which is how a leading team runs out the last couple of minutes without risking a fumble.

How the clock rules shape a two-minute drill

Put together, these rules explain how teams play a final drive:

• Get out of bounds or throw incomplete. Inside the last 5:00, both stop the clock until the snap. A catch in the middle of the field keeps it running, and lining up for the next play can cost 15 to 20 seconds.
• Save timeouts for after plays that end in bounds. A timeout after an incomplete pass is wasted, since the clock has already stopped.
• Spike to save a timeout, not a down. A spike costs a down and a few seconds of lining up. It is worth it on 1st or 2nd down with no timeouts left.
• Play around the two-minute warning. It stops the clock for free, so a trailing team at 2:10 can call a run and still get a stopped clock.
• Do not try to stop the clock with a foul. After the two-minute warning it costs 10 seconds, or a timeout, on top of the yardage.
• Defense: keep everything in bounds. If the offense has no timeouts, a tackle in the middle of the field forces it to spend time or a down to stop the clock.

To see how real coaches handled these spots this season, browse the NFL game-winning drives of 2026, week by week.

Try it in our game

Two Minute Drill Game puts these choices in your hands. You take over a real NFL drive from the 4th quarter, call every play, and choose when to spend timeouts, spike the ball or kick the field goal, and each call is graded on the win chance it gave you. A new NFL daily game comes out every day at midnight US Eastern time, and Practice has unlimited random drives. The game's own clock simplifications are listed in How to Play.