Knock-on and forward pass
The rule that makes rugby a backwards-passing game — what counts as a knock-on, what makes a pass forward, and why the sanction is usually a scrum rather than a penalty.
Overview
Rugby union is defined as much by what players may not do with the ball as by what they may. A player may not knock the ball forward with hand or arm, and may not pass or throw it forward.
These two offences together are why rugby moves the ball sideways and backwards while the players run forwards, and why territory has to be gained by carrying or kicking rather than by throwing.
"Forward" means towards the opposition dead-ball line
Forward is defined relative to the field, not to the passer. A ball that travels forward relative to the ground is forward even if it left the hands travelling backwards relative to a sprinting passer.
This is the source of most crowd disagreement about forward passes: a pass thrown backwards out of the hands by a fast-moving player can still travel forward over the ground. The Laws also recognise that momentum affects the judgement, which is why the call is about the action of the hands as well as the flight.
What is not a knock-on
A knock-on requires the ball to go forward after contact with hand or arm. A ball that comes off a player's foot, leg or body and goes forward is not a knock-on, which is why a charge-down is legal even when the ball flies a long way forward.
A player who knocks the ball forward but catches it again before it touches the ground or another player has not committed a knock-on either.
Why the sanction is a scrum
An accidental knock-on or forward pass results in a scrum to the opposition, not a penalty. The distinction matters: these are errors rather than infringements, and the Laws respond by restarting the contest rather than by punishing.
A deliberate knock-on is different. Knocking the ball forward on purpose — to stop a pass reaching its target — is foul play, and is penalised accordingly.
Key points
- The ball may not be knocked or passed forward towards the opposition dead-ball line.
- Forward is judged relative to the ground, which is why fast passes look forward.
- A ball off the foot or body going forward is not a knock-on.
- Catching your own knock-on before it grounds is not an offence.
- Accidental errors give a scrum; deliberate ones are penalised as foul play.
Where it’s used
Sports that use knock-on and forward pass:
Related rules
Offside
A rule that prevents an attacker from gaining an advantage by being positioned too close to the opponents' goal ahead of the ball and the last defenders.
Yellow and red cards
The disciplinary cards a football referee shows to caution or send off a player for misconduct.
Offside in rugby union
Rugby union's most context-dependent law — where the offside line sits in open play, what an offside player must not do, the 10-metre rule after a kick, and how a player is put onside.
Sources
The rules, dimensions and specifications on this page were read from these documents.
- Laws of the Game: Rugby Union — World Rugby, Law 11 — Knock forward or throw forward (read 2026-09-12)
How it connects
The meaning-bearing relationships that place Knock-on and forward pass in the wider knowledge graph — each one with the reason it exists.
Foundation of
These build directly on this one.
Explore across the knowledge base
Follow the threads that connect Knock-on and forward pass to the rest of SocialSportHub.
Techniques
- Rugby union passingHow a rugby pass is actually made — the sideways swing that replaces a throw, why every pass must travel backwards, and what separates a spiral pass from a pop.
- Forward and back defenceThe two strokes a batter survives with — the forward defensive and the back defensive — when each is the right choice, and why a defensive stroke is a decision about length rather than intent.
- Volleyball DigA defensive contact that keeps a hard-driven ball in play by passing it up off the forearms, usually from a low position.
- Chest PassA two-handed pass thrown directly from chest height in a straight line to a teammate, the most basic pass in basketball and netball.
- Face-offsHow every hockey stoppage restarts — the nine face-off locations, why the location is itself a sanction, and the techniques centres use to win possession.
Learning paths
Positions
- HookerThe hooker is a front-row forward in rugby who wins the ball in the scrum and typically throws the ball into the line-out.
- Rugby union forwardsThe eight players who contest the set piece — front row, locks and back row — what each unit does at scrum, lineout and breakdown, and why the roles are so specialised.
- Scrum-halfThe scrum-half is rugby’s link between forwards and backs, feeding the scrum and delivering quick, accurate passes to launch attacks.
- Rugby union backsThe seven players who attack the space the forwards create — scrum-half, fly-half, centres, wings and fullback — what each does in attack and defence, and how the line is organised.
Tactics
- Rugby union set-piece strategyWhy the scrum and lineout are attacking platforms rather than restarts — how a set piece fixes defenders in known positions, and what a team is buying when it chooses one over a kick.
- Territory versus possessionRugby union's central strategic trade — when to keep the ball and when to kick it away — and why the 22-metre line makes field position worth more than possession in some parts of the field.
- Phase playHow rugby union teams attack by keeping the ball through successive rucks — what a phase is, why phases move a defence, and the cost that eventually makes a team stop.
- The power playWhat a team does with a one-player advantage — the umbrella and 1-3-1 setups, why the extra player creates a passing triangle a penalty kill cannot cover, and what the clock is worth.
Scoring systems
- Scoring in rugby unionThe five ways points are scored in rugby union and what each is worth — try, conversion, penalty try, penalty goal and drop goal — with the rule that surprises people about the penalty try.
- Extras: byes, leg byes, wides and no-ballsThe runs a fielding side gives away rather than the batting side earning — what separates a bye from a leg bye, why a wide and a no-ball each cost a penalty run, and how each is recorded.
Go deeper with Knock-on and forward pass
Everywhere else on the platform that covers Knock-on and forward pass — assembled from what actually references it, so nothing here is a dead end.
Take it away
Open data and the whole-platform view of this subject.
How this page is maintained
- Content type
- Rule
- Provenance
- Tier A — evergreen educational
- Verified external sources
- 0
- Content updated
- 2026-09-01
Evergreen, first-party explanation — it makes no claim that needs an external source. How we handle sources and reviews.