What Is Offside in Football? Rules and Examples
Offside is one of the most important rules in football, but it is also responsible for some of the game’s most disputed decisions. A goal can be disallowed because a striker moved forward a fraction too early, while another player may stand beyond the defensive line without committing an offence.
The key is understanding that being in an offside position and committing an offside offence are not the same thing. The referee must consider where the attacker was when a teammate played the ball and whether the attacker subsequently became involved in active play.
The offside rule restricts how attackers can become involved in play when positioned beyond the opposition’s defensive line. It also influences how teams defend, build attacks and time their runs behind defenders.
What Is Offside in Football?
Under Law 11 of the Laws of the Game, a player is in an offside position when any part of their head, body or feet is in the opponents’ half, excluding the halfway line, and closer to the opponents’ goal line than both the ball and the second-last opponent.
The hands and arms are not considered when judging offside, including those of the goalkeeper. For this purpose, the arm begins at the bottom of the armpit.
A player is not in an offside position if they are level with the second-last opponent or level with the last two opponents.
The second-last opponent is an important detail. People often describe offside in relation to the last defender, but the rule does not specifically refer to defenders. The goalkeeper usually counts as one of the two opponents, although they may be positioned farther up the pitch.
For example, imagine a striker waiting near the penalty area with only the opposing goalkeeper between them and the goal. If a teammate passes the ball forward while the striker is ahead of the ball and the second-last opponent, the striker is in an offside position.
However, the referee does not automatically stop play. The striker must become involved in active play before an offside offence occurs.
This distinction explains why an attacker can sometimes remain behind the defensive line while a teammate continues an attack elsewhere.
How Does the Offside Rule Work?
The most important moment in an offside decision is when the ball is played or touched by a teammate.
The referee considers the attacker’s position at that instant, not where the attacker is standing when the pass arrives.
If a striker is level with the second-last opponent when a teammate plays a through ball, the striker can run beyond the defensive line and receive the pass legally.
By contrast, a striker who is already in an offside position when the pass is made cannot avoid the offence simply by running back into an onside position before receiving the ball.
An offside offence occurs when a player in an offside position becomes involved in active play in one of three ways.
Interfering With Play
The clearest example is touching or playing a ball passed by a teammate.
Suppose a midfielder delivers a through ball towards a striker who was beyond the second-last opponent when the pass was made. If the striker receives the ball, the referee awards offside.
It does not matter whether the striker has moved back towards midfield before touching it. The original position at the moment of the pass remains decisive.
Interfering With an Opponent
An attacker can also commit an offside offence without touching the ball.
For example, a player standing in an offside position may obstruct the goalkeeper’s line of vision as a teammate shoots.
An offence can also occur if the attacker challenges an opponent for the ball or clearly attempts to play a nearby ball in a way that affects an opponent’s ability to play it.
Merely standing near a defender is not necessarily enough. The attacker’s actions must meet the conditions for interfering with an opponent.
Gaining an Advantage
A player in an offside position can be penalised after the ball rebounds from the goalpost, crossbar or an opponent.
Imagine a striker standing beyond the defensive line when a teammate shoots. The goalkeeper saves the attempt, and the ball rebounds directly to the striker, who scores.
The goal is disallowed because the striker gains an advantage from having been in an offside position when the original shot was taken.
The offside rule also influences how teams approach attacking situations. Sides that regularly play through balls behind a high defensive line may create dangerous chances but also risk more offside decisions. These tactical patterns can be considered alongside recent form and team statistics when preparing a today prediction for an upcoming match.
Offside Examples Explained
The easiest way to understand offside is to compare situations that appear similar but lead to different decisions.
Example 1: A striker runs behind the defence too early.
A midfielder prepares a forward pass. At the moment the ball is played, the striker is closer to the goal line than both the ball and the second-last opponent. The striker receives the pass and shoots.
Decision: Offside. The striker was in an offside position when the pass was made and subsequently interfered with play.
Example 2: A striker times the run correctly.
The striker starts level with the second-last opponent. As the midfielder releases the ball, the striker accelerates behind the defensive line and scores.
Decision: No offside. The striker was level with the second-last opponent when the ball was played.
Example 3: An attacker stands beyond the defence but does not participate.
A winger shoots from outside the penalty area. A teammate is in an offside position on the opposite side of the box but does not touch the ball, challenge an opponent or obstruct anyone’s ability to play it.
Decision: No offside offence. Being in an offside position alone is not punishable.
Example 4: An attacker blocks the goalkeeper’s view.
A midfielder shoots towards goal while a teammate in an offside position stands directly in the goalkeeper’s line of vision, clearly preventing the goalkeeper from seeing the ball.
Decision: Offside. The attacker interferes with an opponent even without touching the shot.
Example 5: A defender redirects a pass.
A midfielder passes towards an offside striker. A defender instinctively stretches out a leg and deflects the ball into the striker’s path.
Decision: Offside if the striker then plays the ball. A deflection does not normally reset the offside situation.
However, the decision may differ if the defender had control and deliberately played the ball. The distinction between a deliberate play and a deflection is essential.
When Is a Player Not Offside?
Several situations allow attackers to receive the ball legally, even when they appear to be beyond the defensive line.
A player cannot be in an offside position while in their own half of the pitch. The halfway line itself is not part of the opponents’ half for this purpose.
A player is also onside when level with the second-last opponent or when the ball is at least as close to the opponents’ goal line as the attacker.
The latter situation is common during counterattacks. A forward may pass sideways or backwards to a teammate who is ahead of the defensive line. If the receiving player is not closer to the goal line than the ball when the pass is made, there is no offside position.
Can You Be Offside From a Throw-In, Corner Kick or Goal Kick?
No. Under Law 11, there is no offside offence when a player receives the ball directly from a throw-in, corner kick or goal kick.
These exceptions apply only to receiving the ball directly from the restart.
For example, a striker can receive a long goal kick while standing beyond the opposing defenders without committing an offside offence.
Similarly, a player can receive a throw-in near the opposition’s goal line even if only the goalkeeper is ahead.
However, normal offside rules apply again after a teammate subsequently plays or touches the ball.
A player can therefore be offside after receiving a pass from a teammate following a corner, even though the original corner kick itself was exempt.
What Happens When a Defender Plays the Ball?
This is one of the most frequently misunderstood parts of the rule.
If an opponent deliberately plays the ball while having control and the possibility of passing, gaining possession or clearing it, an attacker who was previously in an offside position is generally not penalised for receiving that play.
An inaccurate clearance can still count as deliberate play.
However, an instinctive block or deflection does not necessarily reset offside. Referees consider factors such as the speed of the ball, the defender’s ability to see it and whether there was time to coordinate a controlled action.
A deliberate save is another exception. If a goalkeeper or defender saves a ball travelling into or very close to goal, an attacker who was in an offside position when their teammate last played the ball can still be penalised for collecting the rebound.
How Do Referees and VAR Check Offside?
Assistant referees traditionally monitor the defensive line and identify attackers who become involved in play from an offside position.
The challenge is that two events must be judged accurately: the precise moment a teammate plays the ball and the attacker’s position at that moment.
At professional levels, video assistant referees can review potential offside offences in the buildup to goals and certain other reviewable incidents.
VAR uses camera footage to help determine the relevant positions and whether an attacking player committed an offence.
Some competitions also use semi-automated offside technology, which combines tracking information with video analysis to assist officials in identifying offside positions.
The technology does not eliminate every judgement call. Officials may still need to decide whether an attacker interfered with an opponent or whether a defender’s contact was a deliberate play rather than a deflection.
These decisions involve interpreting actions, not simply measuring distances.
Offside can also be determined by a very small difference in position. An attacker’s shoulder, head or foot may be slightly closer to the goal line than the second-last opponent when the ball is played.
Because the hands and arms are excluded, officials must identify the relevant playable body parts.
Television camera angles can make players appear level when they are not. A camera positioned away from the offside line may distort the apparent distance between attackers and defenders, explaining why some decisions require detailed review.
How Do Teams Use the Offside Rule Tactically?
Offside is more than a refereeing decision. It is an important part of attacking and defensive strategy.
Teams that defend with a high line position their defenders farther from their own goal, reducing the space available for opponents to build attacks.
This approach can create opportunities to catch attackers offside, but it also leaves space behind the defence.
What Is an Offside Trap?
An offside trap is a defensive tactic in which defenders move forward together just before an opponent plays a pass.
The objective is to leave an attacking player in an offside position when the ball is released.
For the tactic to work, defenders must coordinate their movements carefully. If one defender stays deeper than the others, the attacker may remain onside and gain a clear route towards goal.
A mistimed offside trap can therefore create a dangerous scoring opportunity instead of stopping the attack.
How Do Attackers Avoid Offside?
Successful forwards pay close attention to the defensive line and the movement of the teammate preparing to pass.
One method is to begin a run from a deeper position, accelerating as the ball is played rather than moving behind defenders too early.
Curved runs can also help attackers remain onside while preparing to move into space.
Another approach involves checking towards the ball before turning and running behind the defence. This movement may draw a defender forward and create a gap for a later pass.
Timing is particularly important against teams that use an aggressive high line. Even a well-placed through ball can become ineffective if the receiving player starts the run too soon.
What Happens After an Offside Offence?
When an offside offence occurs, the referee awards an indirect free kick to the defending team.
The kick is taken from the place where the offence occurred, which is not necessarily the position where the attacker was standing when the original pass was made.
For example, an attacker may be in an offside position in the opponents’ half when a teammate passes the ball, then run back into their own half before playing it.
The indirect free kick is awarded where the attacker became involved in active play, even if that location is inside their own half.
An offside offence does not automatically result in a yellow or red card. It is normally punished only by the indirect free kick, although separate misconduct may lead to disciplinary action.
The referee may also delay stopping play when an attacker in an offside position has not yet become involved. This is why an assistant referee sometimes waits before raising the flag.
FAQ
Can You Be Offside Without Touching the Ball?
Yes. A player in an offside position can be penalised for interfering with an opponent, such as by clearly obstructing the goalkeeper’s view or challenging an opponent for the ball.
Can You Be Offside From a Free Kick?
Yes. Unlike a throw-in, corner kick or goal kick, a free kick does not provide an exemption from the offside rule. A player receiving a free kick can be penalised if they were in an offside position when it was taken and subsequently become involved in active play.
Is It Offside if the Ball Is Passed Backwards?
The direction of the pass does not determine offside. A player is onside if they are level with or behind the ball when a teammate plays it. However, a player who is already in an offside position can still be penalised after moving back to receive a backwards pass.
Does VAR Check Every Offside Decision?
No. VAR is used for offside incidents connected to reviewable situations, particularly goals. Ordinary offside decisions during general play remain primarily the responsibility of the on-field officials.
