IHM Knowledge Center
What Is Incidental Contact in Hockey Rules?
When players collide during a play, how do referees decide whether it is a penalty or just incidental contact?
Editor: Coach Mark • Updated: April 19, 2026
Short Answer
Incidental contact is unintentional or unavoidable contact between players that does not result in a penalty.
Full Explanation
Incidental contact is a fundamental concept in hockey that allows the game to flow without stopping for every collision.
Because hockey is a fast and physical sport, players frequently come into contact while skating, battling for position, or pursuing the puck.
If the contact is accidental, unavoidable, or does not give an unfair advantage, it is considered incidental and no penalty is called.
This is closely related to “legal contact hockey”, “interference vs incidental contact”, and “body positioning hockey”.
When Contact Is Considered Incidental
Referees allow contact when:
- Both players are moving naturally toward the puck
- The collision is unavoidable
- No player gains an unfair advantage
- The contact does not restrict movement illegally
These situations are part of normal gameplay.
When Contact Becomes a Penalty
Contact is no longer incidental when:
- A player deliberately initiates contact
- The contact restricts movement or positioning
- The action is reckless or dangerous
- The player is not involved in the play
At this point, penalties such as interference or tripping may be called.
NHL vs IIHF Interpretation
Both NHL and IIHF recognize incidental contact, but interpretation can vary slightly.
NHL games may allow more physical tolerance, while IIHF may penalize borderline situations more strictly.
Decision & Controversy Layer
Incidental contact is controversial because it relies heavily on referee judgment.
Fans may see a collision as harmless, while officials identify a subtle advantage or restriction.
The same type of contact can be allowed in one situation and penalized in another.
This leads to debates in “incidental contact vs interference”, “no call hockey”, and “referee consistency hockey”.
Edge Case: Contact During Puck Battle
A key edge case occurs when players collide while both are attempting to reach the puck.
Even if the contact is significant, it may still be considered incidental if both players are making a legitimate play.
This is one of the most common gray areas in officiating.
IHM Signal System
Signal: Intent + Advantage vs Natural Movement
To determine whether contact is incidental, focus on:
- Was the contact intentional?
- Did it provide an advantage?
- Were both players involved in the play?
- Was the collision avoidable?
Trigger-level rule:
If contact is unavoidable and both players are making a legitimate play without gaining an unfair advantage, it will almost always be considered incidental.
If intent or restriction is present, it becomes a penalty.
IHM Insight
Most fans expect every collision to be judged the same way, but incidental contact is highly situational.
At the professional level, referees prioritize flow and only call penalties when the contact changes the play.
This is why many collisions go uncalled.
Understanding intent and advantage is key to reading these decisions.
Mini Q&A: Incidental Contact
- What is incidental contact?
Unintentional or unavoidable contact with no penalty. - Is all contact legal?
No, only contact without advantage or intent. - Can heavy collisions be incidental?
Yes, if both players are making a play. - What determines a penalty?
Intent, advantage, and restriction. - Why is it controversial?
Because it depends on judgment.
Why This Rule Exists
The concept of incidental contact allows hockey to remain fast and fluid without excessive stoppages.
Key Takeaways
- Incidental contact is part of normal play.
- Intent and advantage determine legality.
- Not all collisions are penalties.
- Referee judgment is critical.