If you have ever watched a football match and wondered why a perfectly good-looking goal was ruled out, there is a good chance the offside rule was involved. Offside is one of football's most important rules, but it can also be one of the hardest to understand at first. The basic idea is simple: an attacking player cannot gain an unfair advantage by staying too close to the opponent's goal and waiting for a teammate to pass the ball. However, being in an offside position is not automatically an offence. A player is only penalised when they become actively involved in play under the conditions set out in Law 11 of the IFAB Laws of the Game..
What Is the Offside Rule in Football?
Under the current Law 11, a player is in an offside position if, at the moment a teammate plays or touches the ball:-
- Any part of the player's head, body or feet is in the opponents' half of the field.
- That part of the player is nearer to the opponents' goal line than both the ball and the second-last opponent.
The hands and arms are not considered when determining an offside position. In simple terms, if an attacker is ahead of both the ball and the second-last defender when their teammate plays the ball, they may be in an offside position. But there is an important distinction:- being in that position alone does not mean the referee must stop the game.
Being Offside Is Not the Same as Committing an Offside Offence
This is the part that often causes confusion. A player can be standing in an offside position without committing an offence. The player becomes liable to be penalised only if they subsequently become involved in active play. This can happen by playing or touching the ball, interfering with an opponent, or gaining an advantage in certain situations. For example, imagine an attacker is standing behind the second-last defender when a teammate passes the ball to another attacker who is onside. If the offside-positioned player does not interfere with an opponent or become involved in the play, the referee can allow the attack to continue..
What Is the Second-Last Defender?
The rule often refers to the second-last opponent, which is why you will sometimes hear commentators talk about a player being "level with the last defender." The goalkeeper is usually the last defender, but not always. Any two opponents can form the relevant offside line. A player is not offside if they are level with the second-last opponent. They are also not offside if they are level with the last two opponents..
When Is the Offside Position Judged?
The key moment is when the teammate plays or touches the ball. The referee does not simply look at where the attacker is when the ball reaches them. The player's position at the moment the teammate plays or touches the ball is what matters. This is also why VAR replays often freeze an image at the exact moment the pass is made. Under the current rules, the first point of contact with the ball is generally used to determine the moment of the pass or touch. There is a specific provision for a goalkeeper throwing the ball, where the last point of contact is used..
Simple Example of Offside
Imagine a striker is standing behind the second-last defender. A midfielder passes the ball forward to the striker. At the exact moment the midfielder plays the ball, the striker is closer to the goal line than both the ball and the second-last defender. If the striker then plays the ball, the referee can penalise the attacker for offside. The restart is an indirect free kick for the defending team.
What If the Attacker Is Behind the Ball?
A player cannot be offside if they are behind the ball at the moment their teammate plays it, even if they are ahead of the defenders. For example, a forward may run behind the defenders but remain behind the ball. If the teammate passes the ball backward and the forward receives it, the player is not in an offside position on that basis. This is one reason attacking players sometimes deliberately stay behind the ball before making a run toward goal..
Which Body Parts Count for Offside?
For determining offside, officials consider the player's:
- Head
- Body
- Feet
The hands and arms are not considered. For this purpose, the upper boundary of the arm is defined in relation to the bottom of the armpit. This means a player is not offside simply because their hand or arm is beyond the second-last defender..
When Is There No Offside?
There are three important restarts from which a player can receive the ball directly without being penalised for offside:-
Goal kick: A player can receive the ball directly from a goal kick even if they are in an offside position..
Throw-in: There is no offside offence when a player receives the ball directly from a throw-in.
Corner kick: A player can receive the ball directly from a corner kick without being penalised for offside. These are important exceptions to remember..
What Happens If the Defender Touches the Ball?
This is where offside decisions can become more complicated. If a defender merely deflects a pass or makes an accidental touch while trying to block it, the attacker can still be penalised for offside if they were in an offside position when their teammate played the ball. However, if a defender deliberately plays the ball, the situation can be different. IFAB's guidelines distinguish between a deliberate play by a defender and a simple deflection. A deliberate play can reset the offside situation, while a deflection does not necessarily do so. That distinction is one reason some offside decisions can look confusing when viewed casually..
Can a Player Be Offside Without Touching the Ball?
Yes. An attacker can be penalised even without touching the ball if they interfere with an opponent.
For example, an attacker in an offside position could block the goalkeeper's line of vision or challenge an opponent for the ball. If that action affects the opponent's ability to play the ball, it can constitute an offside offence. So, simply saying "he didn't touch the ball" does not always mean there is no offside..
What Happens After an Offside Decision?
When an offside offence occurs, the defending team receives an indirect free kick from the location where the offence occurred. If the ball had already entered the goal, the goal can be disallowed if the attacking player committed an offside offence during the attacking move..
How Does VAR Check Offside?
Modern football uses VAR to help officials review close offside decisions in competitions where the technology is available. Because offside depends on the precise positions of players at the moment the ball is played, video replay can be used to identify the relevant moment and compare the attacker's position with the second-last opponent and the ball. This is why viewers sometimes see lines drawn across the pitch during a VAR review. The underlying rule, however, remains Law 11. VAR does not create a separate offside rule; it assists match officials in applying the existing Laws of the Game..
Why Does Football Have the Offside Rule?
The purpose of the rule is to prevent attackers from simply standing near the opponent's goal and waiting for long passes. Without an offside rule, a team could potentially keep an attacker close to the goal while the rest of the team built an attack from deep. Offside encourages attackers to time their runs, defenders to maintain their defensive line and teams to build attacks through movement and positioning. It is therefore not just a technical rule. It has a major influence on football tactics..
Offside Rule in Simple Words
If you want to remember the rule without getting lost in technical language, think of it this way:-
At the moment your teammate plays the ball, you generally cannot be ahead of both the ball and the second-last opponent and then become actively involved in the play.
And remember three important points: Being in an offside position is not automatically an offence. The position is judged when the teammate plays or touches the ball. There is no offside offence from a direct goal kick, throw-in or corner kick..
The football offside rule may look complicated when explained through VAR lines and slow-motion replays, but its basic principle is straightforward. An attacker should not gain an unfair advantage by being too far forward when a teammate plays the ball. The important details are the attacker's position, the second-last opponent, the ball and whether the player actually becomes involved in active play. Once you understand those four elements, most offside decisions become much easier to follow.
And the next time you hear the referee's whistle after a goal, you will have a much better idea of exactly what happened..