Offside Explained: Position, Timing and Involvement

Offside becomes easier to understand when you separate where a player stands from whether that player commits an offence. Being in an offside position is not, by itself, an offence. The official law also considers the relevant moment and the player’s involvement in the subsequent play.

Start with the position

In broad terms, the assessment considers the opponent’s half, the ball and the second-last opponent. Arms and hands are not used to determine the position. A player level with the relevant opponent is not beyond that opponent. For close examples and precise wording, consult Law 11 rather than relying on a broadcast freeze-frame alone.

Add timing and involvement

The position is assessed at the relevant teammate’s play or touch of the ball, not simply when the receiver collects it. The next question is whether the player becomes involved in active play under the law. Interfering with an opponent can matter even without touching the ball, which explains why some decisions involve more than the eventual receiver.

Use replays carefully

A television angle may make two players appear differently aligned from another view. Check which moment the replay shows and which player the decision concerns. Avoid assuming that every touch by a defender automatically removes an offside issue; the distinctions in the law matter. Use the current IFAB explanation for exceptions and detailed situations instead of treating this introductory guide as a replacement for the full rule.