Ice hockey game length, periods, and clock stoppage rules

Which rules does this page explain?

The baseline is the International Ice Hockey Federation Official Rule Book 2026/27, Version 1.0, issued June 2026. All rule numbers and rulings below refer to that edition. The main timing provisions are Rules 34, 37.6, 76.9, 77, 84 and 87.

This is an ice hockey explainer. Do not apply it to field hockey, or assume that an NHL, college, youth or recreational competition uses every IIHF procedure. For a particular fixture, check the competition's adopted rulebook and event regulations, especially its period lengths, intermissions and tie-breaking format.

Three periods, with a fresh clock for each

IIHF Rule 77.1 divides regulation into three equal periods. A countdown display begins each period at 20:00 and runs toward 0:00. The period number matters: 5:00 remaining in the first period is very different from 5:00 remaining in the third.

Example: with 7:30 left in period two, the teams have played 12:30 of that period. Including the completed first period, that is 32:30 of regulation playing time, with 27:30 left. The time spent on whistles and the first intermission is outside that calculation.

There is no separate allowance of added minutes at the end for ordinary stoppages. The clock pauses during them. Correcting an incorrectly recorded time is a different matter, covered below.

When does the game clock start and stop?

Under IIHF Rule 76.9, the puck being faced off starts playing time; an official does not blow a whistle to start the clock. A whistle stopping play, or a goal, stops the timing. The next valid face-off starts it again.

These examples apply the timing rule alongside Rules 78, 81–83 and 85. The reason for the whistle also determines the restart location under Rule 76; see face-off rules and violations.

A raised arm does not itself stop time

IIHF Rule 15 allows a delayed penalty call while the non-offending team retains the relevant possession. Play and the clock continue until the stopping condition is met. The official's signal announces a pending decision; it is not itself the whistle.

Likewise, a delayed offside under Rule 83 can allow play to continue while attackers clear the zone. Do not treat every official's signal as evidence that the game clock should already be frozen.

Example: an official raises an arm for a delayed penalty at 8:10, and play is correctly stopped at 7:58. Those 12 seconds were live playing time. They are not automatically put back because the offence happened earlier. Read penalties and delayed calls and delayed offside for the underlying decisions.

How long are the intermissions?

IIHF Rule 77.2 specifies 15 minutes, or a different duration designated by the IIHF, between regulation periods. Intermission timing begins when the preceding period ends. A venue clock showing a countdown during the break is measuring the intermission, not using up the next period.

Using two 15-minute intermissions as an example, 60 minutes of regulation play plus those breaks already totals 90 minutes. Every ordinary stoppage adds further elapsed time. That arithmetic explains why “a 60-minute game” is not a promise that the final horn will sound an hour after the opening face-off.

For travel or collection arrangements, use the event's schedule and allow for delays and a possible tie-breaker. The regulation playing-time rule alone cannot give a guaranteed finishing time.

Team time-outs and broadcast breaks

IIHF Rule 87.1 permits each team one 30-second time-out during the game, requested during a normal stoppage. It does not let a coach interrupt live play. The clock is already stopped, so the time-out does not take 30 seconds off the period.

There are restrictions. For example, the defending team cannot take a time-out after icing, and a time-out cannot be granted following a face-off violation or during the shootout. A request must also come before the referee completes the player-change procedure. An unused entitlement is therefore not permission to demand a break at any moment.

Rule 87.2 separately regulates commercial breaks, with event-specific adjustments possible. Those breaks occur at eligible stoppages and are not charged as a team's time-out. They extend the viewing time without extending the amount of regulation play.

Does penalty time run during a stoppage?

No. Under the IIHF penalty-time provisions in Rules 16–17 and 35, timed penalties are served in playing time. A stoppage pauses a running penalty clock as well as the game clock. An intermission does not serve the remaining penalty for the player.

Example: a two-minute minor begins with 0:40 left in a period. If those 40 seconds are played and no rule ends the penalty early, 1:20 remains to be served when play resumes in the next period.

Do not assume that every penalty ends after the same amount of time or on every goal. Minor-penalty release, major penalties and overlapping penalties have separate rules. See power plays and penalty kills for those consequences.

What if the clock is wrong?

IIHF Rule 34 assigns game timing to the Game Timekeeper. Rule 37.6 permits video review to establish the correct clock reading. Time incorrectly lost through a false face-off, a face-off violation or the puck going out of play must be restored; the penalty clocks are included where applicable.

Example: a face-off is ruled false, but the clock has run for two seconds. Those seconds must be replaced before the proper restart. This corrects a timing error; it does not award either team extra playing time.

Under Rule 37.6, time disputes go to the Video Review Consultant for adjustment, with the Game Timekeeper assisting through an additional approved timing device. If review establishes that a goal occurred before play was eventually stopped, the officials reset the game clock and any applicable penalty clocks to the confirmed goal time. Review facilities and implementation depend on the IIHF event; see video review and coach's challenges.

Must a shot enter before time expires?

Yes. Under IIHF Rules 37.3(III) and 78, releasing a shot before the end of the period is not enough: the puck must completely cross the goal line legally before time expires. Review can establish whether the puck entered before or after the period ended.

Example: a shot leaves the stick with time remaining but crosses the line only after the period has expired. It is not a goal. By contrast, a puck that completely crosses legally before expiry can count even if officials confirm the decision afterward.

The timing question is only one part of a goal decision. See goals, kicking motions and deflections for other reasons an apparent goal might be disallowed.

Can an intermission start early?

IIHF Rule 77.3 allows the referee to bring forward the next regular intermission if an unusual delay occurs within the last 10 minutes of the first or second period. The unfinished playing time is not discarded.

After the break, the teams complete the interrupted period defending the same goals. They then change ends and start the following period without another delay. For example, an early break with 3:00 left in period two still leaves those three minutes to be played before period three begins.

Overtime is separate from the 60 minutes

IIHF Rule 84.1 provides a sudden-death overtime of up to five minutes for the round-robin or preliminary-round games specified there, after a three-minute intermission. A goal ends that overtime immediately; five minutes is its maximum playing length, not a requirement to play all five.

Do not carry that format into every elimination or medal game. Consult the event regulations for the applicable overtime duration, player strength, repeat periods and shootout procedure. An NHL playoff format should likewise not be inferred from this IIHF preliminary-round provision.

A shootout is a sequence of attempts under IIHF Rule 84.4, not another normal period that adds minutes to the regulation clock. The overtime and shootout explainer discusses competition differences. Return to the ice hockey rules overview for the wider game.

Sources and effective version

• IIHF Official Rule Book 2026/27, Version 1.0 (June 2026): Rules 15–17 and 35 (penalties and penalty timing); 34 and 37.3–37.6 (timekeeping and review); 76.9 and 77 (playing time and intermissions); 78 and 81–85 (goals, stoppages and overtime); 87 (time-outs and commercial breaks).
• IIHF Rules, Regulations & Guidelines: official publication hub for the rulebook, interpretations and event guidance.

Checked on 20 September 2026. The cited edition gives June 2026 as its issue month, without a separate calendar-day effective date. This page explains that edition; apply the rules and event regulations adopted by the competition being played.