Few rules in sport start as many arguments as offside. It empties pubs of goodwill, divides living rooms, and turns calm supporters into amateur geometry lecturers. Yet the offside law itself is short, logical and, once you separate two ideas that people constantly blur together, genuinely easy to follow. This guide walks through what offside means in association football (soccer), when it is actually punished, the situations where it can never be called, how VAR judges the tightest cases, and the myths that refuse to die.
What is the offside rule in football?
Offside is Law 11 of the Laws of the Game, the rulebook maintained by the International Football Association Board (IFAB) and used everywhere from Sunday league to the World Cup. Its purpose is simple: to stop attackers from loitering near the opposition goal and waiting for an easy pass, which would reduce football to a game of long balls into the box.
The rule works in two distinct steps, and understanding the difference between them is the whole secret to understanding offside. The first step is the offside position. The second step is the offside offence. A player can be in an offside position all day without ever committing an offence.
What counts as an offside position?
A player is in an offside position if, at the moment a teammate plays or touches the ball, all three of these things are true:
- They are in the opponents’ half of the pitch (the halfway line does not count as being in the opponents’ half).
- They are nearer to the opponents’ goal line than the ball.
- They are nearer to the opponents’ goal line than the second-last opponent.
The “second-last opponent” phrasing trips people up, so it is worth unpacking. In almost every normal situation the last opponent is the goalkeeper, which means the second-last opponent is the last outfield defender. That is why commentators talk about the “last man.” But the law deliberately says second-last opponent rather than “last defender,” because if the goalkeeper has charged out of position, an outfield player might be the last opponent instead. The rule still works: you compare the attacker to whoever the second-last opponent happens to be at that instant.
Crucially, only the head, body and feet are measured, and only the parts a player can legally score with count. The hands and arms are ignored for every player, including goalkeepers, because you cannot score with your arm. So a striker whose arm is beyond the defender but whose feet, body and head are level is not in an offside position.
When is a player actually penalised?
Here is the single most misunderstood fact in the entire law: being in an offside position is not an offence. The referee only penalises a player in an offside position when that player becomes involved in active play. The Laws of the Game define three specific ways that can happen.
Interfering with play
This is the most common trigger. A player interferes with play by touching or playing the ball that a teammate has passed or deflected to them. If the ball reaches an offside-positioned attacker and they play it, the offence is complete and an indirect free kick is awarded to the defending team from where the offence occurred.
Interfering with an opponent
A player can be penalised without ever touching the ball if they interfere with an opponent. This includes blocking a defender’s or goalkeeper’s line of vision, challenging an opponent for the ball, clearly attempting to play a ball that is close and affecting an opponent, or making an obvious action that clearly impacts an opponent’s ability to play the ball. A striker standing in front of the goalkeeper as a shot flies in, for example, can be flagged even if the ball never touches them.
Gaining an advantage
The third category covers a player who plays a ball that rebounds or is deflected to them off the goalpost, crossbar, an opponent, or after a save, having been in an offside position when the ball was first played. They gain an advantage from having been in that position, so the offence stands.
The table below shows how the two ideas combine. The same starting position can be perfectly legal or an offence depending entirely on what the player does next.
| Situation when the ball is played | Offside position? | What the player does | Offence? |
|---|---|---|---|
| Attacker ahead of the second-last defender, in the opponents’ half | Yes | Runs back onside, then receives a fresh pass | No |
| Attacker ahead of the second-last defender | Yes | Touches or plays the pass from a teammate | Yes |
| Attacker ahead of the defender, blocking the keeper’s view | Yes | Obstructs the goalkeeper’s line of sight on a shot | Yes |
| Attacker level with the second-last defender | No | Receives the pass and scores | No |
| Attacker in their own half, behind the halfway line | No | Runs onto a through ball | No |
| Attacker ahead of everyone but in a passive, uninvolved area | Yes | Makes no play and does not affect any opponent | No |
When can you NOT be offside?
Several situations make offside impossible, no matter where the attackers are standing. These exceptions catch out casual viewers constantly, so they are worth memorising.
Directly from a goal kick, throw-in or corner kick
There is no offside offence if a player receives the ball directly from a goal kick, a throw-in, or a corner kick. This is why an attacker can stand right beside the goalkeeper at a corner without being flagged. The word “directly” matters: once a teammate touches the ball after the restart, the normal offside rule applies again from the next pass.
In your own half
You cannot be offside in your own half of the pitch. A player who is behind the halfway line when the ball is played is onside even if they are miles beyond the last defender. This is also why offside can never be called directly from a kick-off, when every player must be in their own half.
When the ball comes from an opponent
Offside is judged on passes from teammates. If a defender deliberately plays the ball (a clearance, a pass, or a controlled touch that is not a rushed defensive action), and it reaches an attacker who was in an offside position, that attacker is not penalised. A deliberate save, however, does not reset offside in the attacker’s favour. IFAB has clarified this distinction: a controlled, deliberate play by a defender wipes the slate; a desperate deflection or a save does not.
Being level counts as onside
If any relevant part of the attacker is level with the second-last opponent, the attacker is onside. The benefit of the doubt, written into the law itself, goes to the attacker. “Level equals onside” is one of the few offside phrases that is completely accurate.
How does VAR judge offside?
The Video Assistant Referee (VAR) exists to correct “clear and obvious errors” on a small set of match-changing decisions, and offside in the build-up to a goal is one of them. For offside, though, the standard is different from other VAR checks: because offside is a factual, either-or question rather than a judgement call, VAR treats it as a factual review rather than an opinion. If the lines show an offence, the goal is disallowed, even by a toe.
How the check works
The VAR team first identifies the exact frame in which the ball was played by the teammate, because offside is judged at that precise moment and not when the attacker receives it. They then draw calibrated lines: one across the attacking player’s furthest legal point (head, body or foot) and one across the second-last defender’s furthest legal point. If the attacker’s line is beyond the defender’s, it is offside. Many leagues now use semi-automated offside technology, which uses limb-tracking cameras and a sensor in the ball to generate these lines faster and with less human line-drawing.
Two points cause most of the confusion. First, the decision hinges on the frame the ball is played, so a striker who times a run perfectly can be level at the pass and then sprint clear legally. Second, tight calls can look wrong on a normal broadcast replay because the camera is rarely aligned with the offside line; the calibrated VAR lines correct for that camera angle.
What are common offside myths?
Because offside is argued about so often, a lot of confident-sounding folklore has grown around it. Here are the biggest misconceptions, corrected.
“He was offside because he was ahead of the defender.”
Only if he then got involved in play. Position alone is never an offence. An attacker can stand in an offside position for the whole move and, as long as he does not touch the ball, block an opponent, or gain an advantage, no flag should come.
“You judge offside when the striker receives the ball.”
No. Offside is judged at the moment the teammate plays the ball, not when it arrives. This is exactly why a well-timed run beats the offside trap: the runner is level or behind at the pass and only moves ahead afterwards.
“You can be offside from a corner.”
Not directly. Corners, throw-ins and goal kicks are all exempt. Offside can only re-enter the picture after a subsequent touch.
“If your arm is offside, you’re offside.”
Arms and hands are never measured, for anyone. Only the parts you can score with count, which is why a handful of goals ruled out for an offside “armpit” or shoulder are really about the shoulder, the lowest point of the arm being where the measured body begins.
“Level means the attacker loses out.”
The opposite. The law gives the attacker the benefit of any doubt, so level is explicitly onside. If the lines are dead even, the goal stands.
Strip away the shouting and offside is a two-part test with a handful of clean exceptions. Ask first whether the player was in an offside position when the ball was played, then ask whether they actually did anything with it. Once those two questions stay separate in your head, the most contentious law in football becomes one of its most logical.
Frequently Asked Questions
Can you be offside in your own half?
No. A player can never be offside if they are in their own half of the pitch when the ball is played by a teammate. The halfway line itself counts as being onside, so a player level with the line is safe. This is also why offside can never be given directly from a kick-off.
Is it offside if you are level with the last defender?
No, being level with the second-last opponent counts as onside. The Laws of the Game give the attacker the benefit of the doubt, so a player is only in an offside position if part of their head, body or feet is actually beyond the second-last defender. If the two are dead level, the attacker is onside.
Why is it not offside from a corner or throw-in?
Law 11 specifically exempts goal kicks, throw-ins and corner kicks from offside when the ball is received directly from that restart. This lets attackers position freely at corners and throw-ins. The exemption only covers the first touch; once a teammate plays the ball again, normal offside rules resume.
At what moment is offside judged?
Offside is assessed at the exact instant a teammate plays or touches the ball, not when the attacker receives it. That is why a striker can start level or behind, then sprint past the defence legally as the pass is played. VAR and semi-automated systems freeze this precise frame to draw their lines.
Does the attacker’s arm count for offside?
No. The hands and arms of all players, including goalkeepers, are ignored when judging offside because you cannot legally score with them. Only the head, body and feet are measured. The measured body is considered to begin at the bottom of the armpit, which is why some tight calls appear to involve the shoulder.
