The Offside Rule, Explained Simply

Offside confuses people not because it is complex, but because it requires three conditions to be true simultaneously.

1. Position

A player is in an offside position if any part of the body that can legally score (head, body, feet — not hands) is closer to the opponent’s goal line than both the ball and the second-last opponent. The goalkeeper is usually the last, so “second-last” normally means the last defender.

2. Timing

Position is judged at the moment the ball is played or touched by a team-mate. Standing in an offside position while the ball is not being played is not an offence.

3. Involvement

This is the part most people get wrong. Being in an offside position is not an offence. It becomes one only if the player interferes with play (touches a pass from a team-mate), interferes with an opponent (blocks vision or movement), or gains an advantage (for example, a rebound off the post).

When offside does not apply

There is no offside from a throw-in, a goal kick or a corner. It also does not apply when a player receives the ball directly from his own goalkeeper’s goal kick.

Common fan mistakes

Many assume a player running from behind the defence is always offside. What matters is the position when the pass is made, not when the ball is received. A player can start behind the ball and still run through legally.

Technology and tolerance

Semi-automated systems use cameras and a ball sensor to judge position to within centimetres. But the law still needs a human to decide whether a player interfered or gained an advantage — which is why debate survives even when the technology is accurate.