The offside rule explained in one sentence: a player is penalised only if they are in an offside position when a teammate plays or touches the ball and then become involved in active play. Standing beyond the defensive line is not automatically an offence.
The law is designed to prevent attackers from gaining an unfair advantage by waiting close to the opponents’ goal. It is judged at the exact moment the teammate plays the ball, not when the receiving player gets it.
What counts as an offside position?
A player is in an offside position when all of these conditions apply:
- Part of the player’s head, body or feet is in the opponents’ half.
- Part of the player’s head, body or feet is nearer to the opponents’ goal line than both the ball and the second-last opponent.
- The player is not level with the second-last opponent.
Hands and arms are not considered. For attackers, the boundary is the line at the top of the arm where the armpit begins. The goalkeeper is usually one of the two opponents closest to the goal, but the law does not require the goalkeeper to be one of them.
The halfway line also matters. A player cannot be in an offside position in their own half, even if they are behind the second-last opponent. The second-last opponent is often a defender, but it could be any opposing player.
When does an offside position become an offence?
Being beyond the defensive line is only an offside position. An offence occurs when the player becomes involved in active play after a teammate plays or touches the ball. The main situations are:
Interfering with play
This means playing or touching the ball passed or deflected by a teammate. If an attacker is beyond the second-last opponent when the pass is made and then receives it, the assistant referee may flag for an offside offence.
Interfering with an opponent
An attacker can be penalised without touching the ball. This happens if they block an opponent’s line of vision, challenge for the ball, make an obvious action that affects an opponent’s ability to play it, or clearly prevent an opponent from making a legitimate play.
Gaining an advantage
An offside offence can also arise when a player gains an advantage from a rebound, deflection or save after being in an offside position. For example, an attacker may be penalised for scoring from a rebound after an opponent’s goalkeeper makes a save.
How the second-last defender is judged
The offside line is based on the second-last opponent, not necessarily the last outfield defender. If the goalkeeper has moved forward, another defender may be the last opponent and the goalkeeper may be the second-last. The ball can also be closer to the goal line than the attacker; in that case, the player must be level with or behind the ball to avoid an offside position.
Only the parts of the body that can legally score count. A player’s head, torso and feet may place them beyond the line, but an extended hand or arm does not.
Restarts that cannot create an offside offence
The football offside law does not apply when a player receives the ball directly from:
- A goal kick
- A throw-in
- A corner kick
If the ball is passed to the attacker after one of these restarts and another teammate touches it first, the normal offside rule applies again. The exemption belongs to the direct restart, not to the entire attacking move.
Deliberate play and deflections
A difficult offside decision often depends on what a defender did with the ball. If a defender deliberately plays the ball, an attacker who was previously in an offside position may not be penalised solely because the ball then reaches them. A deliberate play usually involves an intentional action to play the ball, with enough time and control to make that action meaningful.
A deflection is different. If the ball merely rebounds from a defender who did not deliberately play it, the attacker’s original offside position can still matter. A save by a goalkeeper or another player who stops a shot is also treated differently from a deliberate play.
How VAR reviews offside decisions
In matches using the video assistant referee system, officials review the moment the ball was played and the position of the relevant attacker. The review may consider whether the player interfered with an opponent, whether a defender deliberately played the ball, and whether the attacker’s body was beyond the offside line.
Technology can draw a virtual line, but it does not replace the referee’s judgement in every part of an offside decision. A computer-assisted line may establish position, while the on-field referee or VAR must decide whether the attacker interfered with play or an opponent.
For close calls, the visible frame showing the passer’s contact with the ball can affect the outcome. A tiny difference in the selected moment may change the apparent position of the attacker, which is why reviews can take time.
Common offside examples
- Through ball: An attacker is beyond the second-last opponent when a teammate makes a forward pass. The attacker runs onto the ball and touches it. This is normally an offside offence.
- Level with the defender: The attacker’s legally scorable body parts are level with the second-last opponent when the pass is made. The player is onside.
- Behind the ball: The attacker is closer to the halfway line than the ball when the teammate passes. The player is onside, even if no second-last defender is between them and the goal.
- Passive position: An attacker is in an offside position but does not touch the ball, obstruct an opponent or affect the play. No offence is called unless the player later becomes actively involved.
- Corner kick: The attacker receives the ball directly from a corner. Offside is not called on that first touch.
Why offside decisions matter in football betting
An offside call can change whether a goal counts, which may affect markets such as match result, total goals and both teams to score. A ruled-out goal is not the same as a disallowed bet settlement in every market, so the bookmaker’s rules should be checked before relying on a particular interpretation.
Live match data can also show a goal before a VAR review is complete. Delayed confirmation is especially relevant for in-play markets, where prices may change while officials assess a possible offside offence. This is a rules issue rather than a reliable betting signal, and live betting carries a high risk of rapid losses.
Frequently asked questions
Can a player be offside in their own half?
No. A player cannot be in an offside position while in their own half. The offside line is considered only after the player has entered the opponents’ half.
Does an attacker have to touch the ball to be offside?
No. An attacker may be penalised for interfering with an opponent, such as blocking a defender’s movement or line of vision, even without touching the ball.
Can a player be offside from a throw-in?
No, not directly. A player can receive the ball directly from a throw-in without being penalised for offside. The normal law applies after another teammate touches the ball.
What is the difference between offside position and an offside offence?
Offside position describes where the player is standing when a teammate plays the ball. An offside offence occurs only when that player then becomes involved in active play or interferes with an opponent.
Why was a goal disallowed when the scorer did not touch the ball?
The scorer or another attacker may have interfered with an opponent or gained an advantage from an offside position. Touching the ball is not the only way to affect the play.