What Is a 10 Second Runoff? NFL Clock Rules Explained

A 10 second runoff removes time from the NFL game clock in specified late half situations. Its purpose is to account for a stoppage when time otherwise should have kept moving. It is not an automatic addition to every penalty inside two minutes.

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Start with three questions: was the clock running, which rule caused the stoppage, and had the two minute warning occurred? The answers determine whether a runoff applies and which team has an option.

Offensive acts that conserve time

After the warning of either half, qualifying offensive acts while time is running can trigger a runoff. Examples include a foul that stops the clock during a dead ball period, intentional grounding and specified illegal passing or batting actions.

That is why intentional grounding can cost more than field position and a down. It may also remove 10 seconds. A false start that stops a running clock can create a similar clock consequence.

For the standard offensive procedure, the offense may use an available timeout instead of the runoff. The defense may decline the runoff while accepting the yardage. If it declines the yardage penalty, the runoff is declined too. Without a timeout or other applicable rule, the clock normally restarts on the ready signal after the deduction.

Replay is a different procedure

After the warning, a review that changes the ruling to an outcome with a running clock can require a runoff. Neither team may simply decline this correction, but either can use an available timeout to prevent it.

For example, a play initially ruled a touchdown stops the clock at eight seconds. Replay shows the runner down inbounds short of the goal line. If the replay runoff applies and no timeout prevents it, those eight seconds can disappear and the half can end.

Excess injury timeouts have their own rules and exceptions. They should not be treated as identical to either an offensive foul or a replay reversal.

Ten seconds is only part of the result

The play clock and game clock restart are separate decisions. After a normal offensive runoff, the play clock is set to 30 seconds and the game clock generally starts on the ready signal. An offense that waits to organize can lose additional time before snapping.

A legal incomplete pass or other play that already stops time does not automatically create a runoff because a flag also appears. Listen for the official's stated clock ruling and timeout option.

Keep learning

• Two minute warning: Understand the timing window.

• False starts: See which movement stops the play immediately.

• Out of bounds clock rules: Compare a legal stoppage with a running clock result.

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Rules reviewed October 10, 2026. Official 2026 NFL rulebook. Rule 4, Sections 5 and 7.