Few football rules start as many debates as offside. The idea behind it is simple: attackers should not wait near the opponent’s goal for a long pass. The details are where most confusion comes from.
When a player is in an offside position
A player is in an offside position if, when the ball is played to them by a teammate, any part of their head, body or feet is:
- in the opponent’s half of the pitch (not counting the halfway line), and
- closer to the opponent’s goal line than both the ball and the second-last opponent.
The goalkeeper usually counts as one of the opponents, so in most cases the second-last opponent is a defender. Hands and arms, including the goalkeeper’s, are not used to judge position.
Being in an offside position is not an offence
This is the part many fans miss. A player is only penalised if, at the moment the ball is played by a teammate, they then become involved in active play. That means interfering with play by touching the ball, interfering with an opponent, or gaining an advantage from the position.
When offside does not apply
A player cannot be offside directly from:
- a goal kick,
- a throw-in,
- a corner kick.
A player also cannot be offside if they are level with the second-last opponent or level with the last two opponents, or if they are in their own half.
Timing is what matters
Offside is judged at the moment the ball is played, not when the player receives it. That is why a player can run past defenders after the pass has left a teammate’s foot and still be onside. It is also why officials and cameras focus on that exact instant.
Technology and the officials
At higher levels, the video assistant referee (VAR) reviews close decisions, and some competitions use semi-automated tracking technology to help judge the position of players’ bodies quickly. The assistant referee still makes the first call on the pitch.
A simple way to remember it
Ask three questions: Was the player ahead of the ball and the second-last defender? Did a teammate play the ball at that moment? Did the player get involved in the play? If the answer to all three is yes, the flag goes up.
