Rugby League v Union Rules: The Differences Explained
Rugby league vs union rules compared for readers in England, covering team sizes, the play-the-ball, set pieces, scoring values and the two review systems.
By CricketTaken EditorialPublished Rugby League in England19 min read
- Rugby league
- 13 a side
- Rugby union
- 15 a side
- League try
- 4 points
- Union try
- 5 points
Two men in the same town can say they played rugby on Saturday and mean two different sports. Not two versions of a sport — two, with separate laws, separate governing bodies at Twickenham and Red Hall, separate international calendars and, in England, separate maps. The RFU runs one. The RFL runs the other. They have shared an ancestor since 1895 and very little else since 1906.
What follows is the working comparison: what actually differs when the whistle goes, why it differs, and which differences a spectator notices in the first ten minutes as against the ones that only matter to a coach.
Thirteen and fifteen: two differently shaped teams
League fields thirteen, union fifteen, and the missing two are both forwards. A league pack is six — two props, a hooker, two second-rowers and a loose forward — against union's eight, which adds a second flanker and splits the back row into two flankers and a number eight. The backs are seven in both codes, and they line up in recognisably similar positions.
The shirt numbers run in opposite directions, which is the fastest way to embarrass yourself in the wrong clubhouse. Union numbers from the front: one and three are the props, two the hooker, four and five the locks, six and seven the flankers, eight the back-row forward who takes his name from the shirt. Nine and ten are the half-backs, eleven and fourteen the wings, twelve and thirteen the centres, fifteen the full-back.
League numbers from the back. One is the full-back. Two and five are the wingers, three and four the centres, six the stand-off and seven the scrum-half. The forwards then run eight to thirteen, with the hooker at nine and the loose forward at thirteen. A number thirteen in union is an outside centre; a number thirteen in league is a back-row forward. Nothing about the two systems is reconcilable, and the union positions guide sets out one side of it in detail.
The consequence on the pitch is space. Thirteen defenders covering a pitch only marginally narrower than a union one leaves gaps that fifteen would close, and league's whole defensive method — a flat line moving up together — exists because a drift or scattered defence with six forwards would be picked apart. Union's extra bodies allow a defence to commit players to the breakdown and still hold a line, which is why union has a contest for the ball on the floor and league does not.
- 13Players a side in rugby league
- 15Players a side in rugby union
- 6Tackles in a league set
- 10Defensive retreat at the play-the-ball, in metres
Figures from the current laws of both codes. Interchange and replacement allowances are set by individual competitions and vary; the values shown are the common elite-level allowances.
After the tackle: the play-the-ball against the ruck
This is the difference. Everything else follows from it.
In rugby league, when a tackle is completed the tacklers must release the ball carrier, who regains his feet at the point of the tackle, faces the opposition and rolls the ball backwards between his legs with his foot. Behind him stands the dummy-half, a role that has no equivalent in union, who collects the ball and either passes, runs or hands it on. Up to two defenders may stand as markers directly opposite the player of the ball. Everybody else retreats ten metres.
The effect is that possession is guaranteed and the restart is quick, orderly and predictable. There is no contest for the ball once the tackle is complete. What is contested is the speed of the play-the-ball, which is why so much of modern league is a wrestle: defenders slow the tackled player getting to his feet, attackers try to be quick, and referees police the margin between the two.
Union does the opposite. The tackler must release and roll away, the tackled player must present or release the ball, and the ball on the ground is then genuinely available to whoever can legally get to it. Arriving players must stay on their feet and enter through the gate — from behind their own hindmost teammate — and an offside line forms at the hindmost foot on each side. A defender who arrives first, stays on his feet and gets his hands on the ball can steal it outright, which is the jackal.
- League - tackle completeThe ball carrier is held with the ball or a hand touching the ground, and the tacklers must release him.
- League - play-the-ballHe stands, faces the defence and rolls the ball backwards with his foot; up to two markers may stand opposite.
- League - dummy-halfA teammate standing behind collects and distributes, with the rest of the defence ten metres back.
- Union - tackle completeThe tackled player goes to ground; both he and the tackler must release and the tackler must roll clear.
- Union - ruck formsOne or more players from each side, on their feet and bound over the ball, create a ruck and an offside line.
- Union - possession decidedThe ball is contested with feet and body position; it may be won, turned over, or held until a penalty or scrum results.
The sequence set out in the laws of each code. The union sequence assumes a ruck forms; if no opposition player arrives, no ruck exists and no offside line applies.
Two consequences follow, and they explain why the codes look so different from the stand. League has more tackles and fewer bodies on the floor, so the ball moves constantly and the shape of the attack is visible. Union has fewer phases per minute and a genuine contest at each one, so possession is precarious and territorial position matters more. Neither is better. They are answers to different questions, and the union answer is examined in the breakdown laws guide.
Six tackles, and what unlimited possession does to union
A league side keeps the ball for six tackles. On the sixth the ball is handed over, so in practice the attacking side uses five to gain ground and kicks on the last — usually deep, or as a grubber or bomb intended to force a mistake in the in-goal. The whole rhythm of a league match is built on that count, and a spectator who watches the tackle number rather than the ball understands the sport faster than one who does not.
The count was not always six. Unlimited possession was the law from 1906 until the 1960s, and it produced exactly what you would expect: sides that were ahead simply kept the ball, and matches died. A four-tackle rule was introduced to break the stalemate and became six shortly afterwards, which has proved to be about the right number — long enough to build an attack, short enough to guarantee the ball changes hands. That evolution is traced in the six-tackle rule guide.
Competitions have added a set restart, awarded for certain ruck infringements, which resets the count to zero without stopping the clock or changing possession. The idea is to punish the defensive slowing of the play-the-ball without giving the attacking side a penalty and a shot at goal. It was adopted in Australia first and in Super League afterwards, and referees apply it with a rolling hand signal rather than a whistle.
Union has no tackle limit at all. A side may recycle indefinitely, and the modern professional game produces phase counts that would have been unimaginable in the amateur era. The limits on possession in union are the risk of turnover at each breakdown and the penalty count, both of which are more dangerous than any tackle limit because they surrender the ball in a worse position than a handover would.
Set pieces: two scrums and one line-out
Both codes form a scrum, and the two have almost nothing in common beyond the name.
| Element | Rugby league | Rugby union |
|---|---|---|
| Players in the scrum | 6, packed 3-2-1 | 8, packed 3-4-1 |
| Contest for the ball | Effectively none; the feeding side wins it | Genuine, with hooking and a shove |
| The feed | Not policed for straightness in practice | Required to be straight, with laws on the throw-in |
| Engagement | Simple bind and set | Refereed sequence of crouch, bind, set |
| Where it is awarded | Knock-on, forward pass, ball into touch | Knock-on, forward pass, and many other offences |
| Line-out | None; there is no such set piece | Contested throw-in from touch, with lifting |
The league scrum is the more misunderstood of the two. It is not uncontested in the sense that a union scrum with an injured front row is uncontested; it is contested in law and not in practice, because the loss of the strike and the tolerance for a crooked feed have hollowed it out over decades. Its remaining function is to remove twelve players from the defensive line for a few seconds, and coaches design attacking plays around exactly that. The full story is in the rugby league scrums guide.
Union's scrum has gone the other way and become more technical, more heavily refereed and more decisive. It is a genuine contest for the ball and a genuine source of penalties, and a dominant pack can win a match without scoring from open play. The engagement sequence, the binding laws and the penalty offences are set out in the scrum laws guide.
The line-out is union's alone. League abolished it in 1897, and a ball going into touch in the field of play now produces a scrum formed twenty metres in from the touchline rather than a contest on the line. A penalty kicked to touch in league keeps possession with the kicking side, which is precisely the opposite of union, where a penalty to touch surrenders the throw to the opposition unless the kick was from a penalty. Union's version, with its lifting, its calls and its mauls, is covered in the line-out laws guide.
Scoring values, and why they drifted apart
Both codes started with goals worth more than tries and both have moved in the same direction since, at different speeds and to different places.
The gap that matters most is the drop goal. Three points in union makes it a legitimate match-winning weapon, and a fly-half within range is a standing threat that shapes how a defence sets up. One point in league makes it a tie-breaker and almost nothing else — worth taking to break a deadlock in the last minutes, never worth building an attack around.
The penalty goal works the same way. Union's three points make kicking at goal the obvious choice from anywhere inside range, and penalty-heavy matches can pass without a try. League's two points make the penalty a poor return relative to a four-point try, so sides take the tap and go again far more often. If you want to know why union has more kicks at goal, this is the whole answer.
Union raised the try from four to five in 1992 for exactly this reason, having watched too many matches decided by goal-kicking. League had already gone from three to four in 1983. Both changes were attempts to make the act of crossing the line worth more than the act of being fouled, and neither code has finished adjusting. Union also awards a penalty try worth seven points with no conversion attempt, which removes the reward for cynically conceding a certain try. League's scoring history sits alongside union's in the rugby scoring guide.
Interchange and replacement
Union replaces; league interchanges. The distinction is not pedantry.
A union replacement is permanent. Once a player leaves the field he stays off, with narrow exceptions: a front-row forward may return to allow contested scrums to continue, a player leaving for a blood injury may come back, and a head injury assessment allows a temporary replacement while the player is examined. Elite competitions use a matchday squad of twenty-three with eight replacements, and the composition of that bench is regulated to guarantee enough trained front-row cover.
League interchange is rolling. A player who comes off may go back on, and the constraint is the number of interchanges allowed rather than the identity of the player. Competitions have cut that allowance repeatedly, from ten to eight in recent seasons in some cases, deliberately, to increase fatigue and reduce the number of fresh, heavy forwards available late in a match. Head injury assessments and failed HIAs sit outside the count.
The tactical consequence is one of the sharpest divides between the codes. Union coaches plan a set of substitutions to arrive together, changing the character of a pack for the final quarter. League coaches rotate props through short high-intensity spells across the whole match, because a prop who plays eighty minutes in league does not exist. Neither approach would work in the other sport.
There is a live argument in union about whether the eight-man bench has made the sport more dangerous by putting fresh 120-kilogram forwards against tiring ones, and the proposal to cut the bench has serious support. League worked through a version of that debate years earlier and answered it by cutting the interchange count, which is worth remembering when the union version is presented as unprecedented.
The pitch, the in-goal and the restarts
Goal line to goal line, both codes play on a pitch 100 metres long. The differences are at the edges.
Union permits a pitch up to 70 metres wide with in-goal areas that may be up to 22 metres deep. League's playing area is 68 metres wide with a shallower in-goal, and the practical effect at converted football stadiums is a very tight dead-ball area that changes how sides kick on the last tackle. A winger has less room to work with in the corner.
The markings differ in a way that tells you what each sport cares about. Union marks the 22-metre line, the 10-metre lines either side of halfway and the 5- and 15-metre lines that govern the line-out. League marks lines every ten metres from each goal line, because the tackle count and the ten-metre retreat make distance from the line the central piece of information on the pitch.
Restarts diverge as well. Union kicks off with a drop kick from the halfway line; league uses a place kick from the centre. Union's restart after the ball is made dead in-goal by the defending side is a drop-out from the 22-metre line. League has moved to a goal-line drop-out for the equivalent situation, which pins the defending side far deeper and has visibly changed how sides handle kicks into the in-goal.
League also has the 40-20, a kick from inside a side's own 40-metre area that bounces in the field of play and goes into touch inside the opposition 20 — the kicking side gets the scrum feed, an enormous territorial reward that has no union equivalent. Union's nearest cousin is the ability to kick directly to touch from inside your own 22 without losing ground, which gains territory but hands over the throw.
Officials and the two review systems
Both codes use a referee, two officials on the touchlines and a video official, and beyond that the philosophies part.
Union's assistant referees are full match officials who can advise on foul play and are consulted in open play. Its television match official operates within a defined protocol covering grounding, foul play and a limited window of preceding play, and the referee's on-field decision carries weight in how the review is framed. Competitions have also trialled a separate foul-play review process for red cards, in which an off-field official completes the assessment while the game continues. That arrangement varies by competition and has been changed more than once, so a supporter should not assume the version used in one tournament applies in another. The protocol as it stands is set out in the TMO guide.
League's video referee is used more narrowly and, in most competitions, more quickly. Referees also have the on-report mechanism, which allows play to continue with an incident flagged for later review rather than adjudicated live. The RFL then runs a match review panel that grades charges after the match and applies suspensions on a points basis, so a player may be punished for something the referee never penalised on the day.
Both codes use a ten-minute sin bin and a red card for serious foul play. League's use of the sin bin has historically been sparing compared with union's, though the gap has narrowed as both sports have tightened on high contact. The tackle-height law has been amended more than once in each code and the elite and community games have not always been on the same version, which is worth checking before assuming a rule you saw applied on television applies at your local club.
Where each code is played in England
The map is unusually sharp for a country this small. Professional rugby league sits in a corridor running from Merseyside and Wigan across Greater Manchester into West Yorkshire, with outposts in Hull, Cumbria and the north-east. Union is national, with concentrations in the West Country, Gloucestershire, London and the Home Counties, and it is the code played by most schools outside the league belt.
The reason is entirely historical. The clubs that walked out of the RFU in 1895 were the leading sides of Lancashire and Yorkshire, and the code they created stayed where they were. The RFU's ban on anyone who had played league then hardened the boundary for a century by making it costly to play both, and the boundary has outlived the ban by a generation. That history is set out in the 1895 split guide, and the modern geography in the northern heartlands guide.
There are consequences a player feels. A talented teenager in Warrington will be scouted by league clubs and may never be seen by a union academy. A talented teenager in Bath will play union at school and is unlikely to have a league club within reach. England produces two separate talent pools drawn from two separate parts of the country, and both codes have periodically tried and largely failed to change that.
Money hardened the divide further after 1995. Union's professional clubs are concentrated in the south and the Midlands, its international side sells out an 82,000-seat stadium in south-west London, and the RFU distributes revenue on a scale the RFL cannot approach. League's professional clubs sit in towns whose populations are a fraction of the cities union's clubs draw from, and the sport has never solved the arithmetic that follows from that. A supporter comparing the two codes on the strength of their finances is comparing a national governing body with a regional one, which is a fair description of the position and an unfair basis for judging the rugby.
Both codes are played nationwide at community level, and university and student rugby is where the boundary blurs most. Plenty of English players now hold registrations in both codes across a year, playing union in winter and league in summer, which the 1895 generation would have found extraordinary.
Switching codes: what transfers
The traffic since 1995 has run mostly from league to union, for the obvious financial reason, and the results have been informative about which skills belong to rugby and which belong to a code.
What transfers is everything to do with contact in open play. League players carry into contact with better footwork, because they do it more often against a set defence. They tackle with better technique and better line speed, because league defence is a drilled collective discipline. Jason Robinson's move from Wigan to Sale produced an England career including the 2003 World Cup final because evasion in a confined space is the same skill in both sports. Andy Farrell's transition to Saracens and England, and later to coaching at the highest level in union, made the same point about reading a defensive line.
What does not transfer is the set piece and the breakdown. A league forward arriving in union has never scrummaged in a contested eight, never jumped or lifted in a line-out, and has spent his career being told to stay on his feet and get back onside rather than to compete for a ball on the floor. That last habit is the hardest to break, and it is why league converts concede breakdown penalties in their first season. Sam Burgess's move to Bath was widely discussed in exactly these terms.
Going the other way, union players arriving in league find the fitness demand and the tackle count harder than the skills. There is no rest in a league match — no line-out to walk to, no scrum to reset — and the aerobic profile is genuinely different. The players who have made the switch most comfortably are back-three players, whose job under a high ball is essentially identical in both sports.
Words that mean different things in each code
A short glossary saves a lot of confusion, and several of these trip up broadcasters.
Ruck. In union it is a defined phase with an offside line, formed when players bind over the ball on the ground. In league the word is used loosely for the area around the play-the-ball, and no offside line of the union kind exists there.
Second row. Both codes have them, and they do different jobs. Union's are line-out jumpers and scrummagers; league's are wide-running forwards who carry and defend in the edges.
Loose forward. In league, the number thirteen who packs at the back of the scrum. In union the phrase describes the whole back row, and the equivalent position is the number eight.
Stand-off and fly-half. The same shirt, the same broad role, different names. League also says pivot; union says outside-half in Wales.
Dummy-half. League only. The player who collects from the play-the-ball. Union has no such position because it has no play-the-ball.
Mark. Union only. A defender catching a kick inside his own 22 may claim a mark and receive a free kick. League has no equivalent, and calling for one will get you nothing but a tackle.
Differential penalty. A league term for an offence at the scrum punished with a penalty from which a goal may not be kicked. Union has free kicks that work in a comparable way but does not use the word.
Drop-out. Both codes have one; they are taken from different places and for different reasons, as above.
Which code is harder to referee
Union, and it is not particularly close. A union referee is adjudicating a contest for possession at every breakdown, a technical contest at every scrum, an aerial contest at every line-out, and an offside line that reforms constantly and is invisible on television. The laws give him more decisions to make per minute than any other major team sport, and reasonable officials genuinely disagree about the same footage.
League's referee has a smaller decision set and a clearer one. Possession is not contested after the tackle, so the questions are narrower: was the tackle completed, was the play-the-ball allowed to happen, is the defence ten metres back, what is the tackle count. Those are answerable. The hard part of league officiating is the wrestle in the tackle, where the offence is a matter of degree rather than of fact.
The consequence for a spectator is that union matches are shaped by the referee's interpretation to a degree league matches are not, and coaches in union prepare for individual officials in a way that would strike a league coach as strange. Neither sport regards this as satisfactory. Union keeps rewriting the breakdown laws in an attempt to make them simpler to police, and league keeps adjusting the ruck rules for the same reason.
For anyone deciding which to watch, the honest guidance is that league is easier to follow on a first viewing and union rewards a second. Both are worth the time, and the England rugby section covers each separately, with the club competitions explained in the Super League format guide and the rest of the section indexed on the England guides hub.