What Is Offside in Soccer?
The 30-second answer
A player is offside if they’re closer to the opponent’s goal than the ball and the second-to-last defender when a teammate plays the ball to them. In plain terms: you can’t loiter by the other team’s goal waiting for a pass. The rule forces attackers to time their runs instead of cherry-picking.
The slightly longer version
It’s judged at the moment the ball is kicked, not when it’s received that’s the part everyone gets wrong. A striker can sprint past the whole defense legally, as long as they were level with (or behind) the second-to-last opponent when their teammate struck the pass. The “second-to-last” is usually the last outfield defender, since the goalkeeper is typically the last one back.
There are famous exceptions: you can’t be offside from a goal kick, corner kick, or throw-in or in your own half at all. And these days, VAR checks the tight ones with digital lines, which is why you see goals chalked off because someone’s toe was an inch beyond the defender. Defenses also weaponize the rule with the “offside trap” the whole back line steps up in unison to strand attackers beyond them.
What to watch for:
- The assistant referee’s flag is raised above their head and then lowered according to which side of the field the offside occurred (note they often delay it now, letting the play finish before signaling, in case VAR needs to review)
- The defensive line stepping up together right as a pass is played that’s the offside trap in action.
- A striker checking their run, glancing across the defensive line before sprinting they’re making sure they time it legally.
- The VAR line-drawing wait after a tight goal if a celebration gets cut short, offside is the usual suspect.
Say this out loud
“Flag’s up! They were past the last defender before the ball was even kicked.”
