Ice Hockey Rules: Periods, Power Plays, Icing and NHL Overtime
NHL games have three regulation periods, goals decide the score, penalties can create a manpower advantage, and ties use different overtime procedures in the regular season and playoffs.
Timeline
- Regulation: Teams play three twenty-minute periods, changing ends, and score by legally sending the puck across the goal line.
- Special situations: Penalties, offside and icing change manpower, face-off location or the flow of play under league rules.
- Tie resolution: A tied NHL game proceeds to the applicable regular-season or playoff overtime format.
An NHL game begins with a face-off and uses three 20-minute regulation periods. Each team normally has five skaters and one goaltender on the ice, with substitutions made during play or stoppages. The puck must completely cross the goal line between the posts and under the crossbar for a legal goal. The club with more goals after regulation or the applicable overtime procedure wins. [1][2]
The game clock counts down while play is live and stops for whistles, so a 60-minute regulation game takes much longer in real time. Teams change ends between periods. A scoreboard shows goals, period, time and often shots, but a shot on goal is not a point: NHL defines it as a puck that enters the net or would have entered but for the goaltender. Only goals determine the game score. [2][3]
A minor penalty commonly removes a skater for two minutes, creating a power play for the opponent and a shorthanded situation for the penalized club. For many minor penalties, a power-play goal ends that penalty; major, double-minor, coincidental and misconduct situations have different rules. The displayed player counts, such as 5-on-4, explain the immediate manpower rather than the total number of players available on each roster. [1][2]
Offside controls entry into the attacking zone: attacking players generally cannot precede the puck across the offensive blue line under the possession and delayed-offside rules. Icing generally concerns sending the puck from behind the center red line across the opponent's goal line without a qualifying touch. NHL uses detailed exceptions and hybrid icing judgments. Neither call is a penalty by itself; each normally stops play and determines a face-off location. [1][4][5]
If an NHL regular-season game is tied after regulation, it proceeds to a five-minute sudden-death overtime played with fewer skaters, followed by a shootout if still tied. The shootout begins with three attempts per team and can continue sudden death. The official final score credits the shootout winner with one additional team goal, while the deciding shootout attempt is not recorded as an individual goal in player statistics. [2][6]
Stanley Cup playoff ties use a different system: teams play full 20-minute sudden-death overtime periods with intermissions until a goal is scored, and there is no shootout. This difference makes the label overtime incomplete without the competition context. International, collegiate, women's, youth and recreational hockey can use other period lengths, overtime formats, icing standards and penalty procedures, so NHL rules should not be assumed universally. [2][6]
To follow a game, track the score, period, time, manpower and penalty clocks. When a whistle sounds, look for the referee signal and the next face-off location; that usually distinguishes a penalty from offside, icing or another stoppage. During a delayed penalty, the non-offending team may replace its goaltender with an extra attacker because play will stop when the offending team gains control. The official rulebook resolves edge cases beyond these viewing basics. [1][2][3][4][5][6]
Sources
- NHL — Video Rulebook
- NHL — Official Rules 2026-27
- NHL — Hockey Glossary
- NHL Video Rulebook — Off-Side
- NHL Video Rulebook — Icing
- NHL Official Rules — Overtime and Shootout