8 min• 03.07.2026
Indoor football explained: rules, players, and pitch size
By Dawid Pątko
In England, small-sided football is how most adults actually get a game. It sits inside a sport that 15.7 million people play across the country, and the Football Association calls small-sided formats like five-a-side and indoor football the fastest-growing, most popular corner of the adult game. It is quicker, tighter, and higher-scoring than the eleven-a-side version, and for a lot of players it is the only football they get all week.
Ask ten people what indoor football is and you will get ten slightly different answers, because the rules genuinely change from one venue to the next. This guide lays out what indoor football is, how many players are on a team, the pitch size, the core rules, and how the indoor game differs from both the outdoor game and futsal. Only futsal is a standardised code; everything else people call "indoor football" is shaped by the venue and whoever runs the league. If that person is you, the last section is about turning it into a season.
What is indoor football?
The term covers a few variants, so it helps to start with a clear definition before getting into the rules.
Indoor football, defined
Indoor football is a fast, small-sided version of the game played indoors, usually five or six players a side including the goalkeeper, on an artificial-turf pitch enclosed by walls or boards. The boards keep the ball in play, so the game flows almost without stopping. Most versions run two short halves and produce far more goals than a standard outdoor match.
The pitch: turf, walls, and boards
Indoor football is played on an artificial pitch roughly the size of an ice-hockey rink, around 50 by 27 metres, though the dimensions vary from one venue to another. The defining feature is the perimeter. Most indoor arenas ring the pitch with solid walls or boards, so a ball played into them rebounds and stays live instead of going out for a throw-in. That walled, boards-in-play version is what North Americans call arena soccer; over here you are just as likely to meet it as indoor football in a sports hall or on a caged astroturf pitch.
Not every venue has boards. Some use a smaller court with touchlines and no walls, closer to futsal, which is part of why "indoor football" is such a slippery label. The surface, the walls, and the court size all depend on where you play.
Indoor football rules and format
The rules follow from the space. A small pitch, a perimeter wall, and only a handful of players a side add up to a quicker, more relentless game than the outdoor version.
Players and game length
Most indoor football is played five or six a side, including the goalkeeper, though youth and mixed formats range from four to seven. Games are short. The usual format is two halves of about 20 minutes on a running clock, sometimes split into quarters. A full match wraps up in under an hour, which is exactly how a single venue can run league games back to back all evening.
The rules that make indoor football different
A handful of rules separate the indoor game from what you see on a Saturday-morning pitch:
- The ball stays in play off the walls – in the boarded game, the walls replace the touchlines, so play rarely stops and the tempo barely drops
- No offside – most indoor codes drop the offside rule entirely, which keeps attackers high and games open
- Rolling substitutions – players swap on the fly, so nobody stands still for long
- Fast restarts – kick-ins or plays off the wall replace throw-ins, and many venues run a short shot clock or a no-slide-tackle rule to protect players on the hard surface
- Smaller goals and a keeper's area – goals are smaller than outdoor nets, and a marked goalkeeper zone limits how defenders and keepers can play near them
Indoor football rules vary by venue
There is no single global rulebook for indoor football. Only futsal, governed by FIFA, is fully standardised. The walled game runs on rules written by the venue, the league operator, or a national body, so pitch size, squad limits, whether the walls are in play, and how fouls and penalties are handled can all shift from one venue to the next. That puts the organiser in charge of setting a consistent rulebook, which starts to matter the moment you are running more than a few teams.
Indoor football vs outdoor football
If you are coming from the eleven-a-side game, almost everything scales down and speeds up. Here is how the two compare on the points players notice first.
Indoor football:
- Pitch around 50 by 27 metres, artificial turf, usually walled
- Five or six players a side, including the keeper
- Two halves of roughly 20 minutes, running clock
- Walls keep the ball in play; no throw-ins in the boarded game
- High-scoring and fast, played year-round
Outdoor football:
- Pitch up to about 105 by 68 metres, grass, open touchlines
- Eleven players a side
- Two halves of 45 minutes
- Ball leaves play for throw-ins, goal kicks, and corners
- Lower-scoring, tied to the season and the weather
Tactics in a smaller space
The smaller space rewards quick, one-touch passing and constant movement. There is no room to dribble past three players or hit a raking cross-field ball, so the ball has to move faster than the legs. The walls become an extra team-mate, letting you play a one-two off the boards to beat a defender. And with five outfielders at most, the old split between attackers and defenders blurs: everyone does both, every shift.
Indoor football vs futsal
People use the two words interchangeably. They are not the same game. Futsal is the standardised indoor code: five a side on a hard court with marked lines, no walls, and a smaller ball with less bounce that stays low and rewards close control. When the ball crosses the line in futsal, it goes out, just like the outdoor game.
The walled indoor game is played on turf, inside boards that keep the ball live, usually with a normal ball. It is faster and more transition-heavy, where futsal leans on technique and tight passing. If you want the full breakdown of the standardised game, we covered futsal rules and formats separately.
Running an indoor football league
Someone has to turn all of this into a season, and because indoor rules are not fixed, part of the job is deciding your own. You settle on a format, a squad size, a set of house rules, and how many teams share the venue each night. From there it is the same work as any league, only faster-moving, and doing it by hand across an evening of back-to-back matches gets old fast.
The first job is the calendar. You build a schedule around your pitch slots and publish the fixtures so nobody turns up on the wrong night. FLM System generates the whole fixture list for you, the same way we cover in our guide to building a season of fixtures.
With matches running back to back, results need to land the moment the final whistle goes, not on Monday morning. Referees post live scores from the touchline on their phone, and the table and top-scorer charts recalculate on their own.
Players also want somewhere to look between games. A public league page puts the table, fixtures, and results on every phone, which is a big part of what makes an indoor league feel like a real competition. If you are starting from scratch, our walkthroughs on running an amateur league and organising small-sided competitions are good next reads.
Set your rules once, let the software keep the season straight, and you can spend match night watching football instead of updating a spreadsheet.
FAQ
How many players are on an indoor football team?
Most indoor football is played with five or six players on the pitch per team, including the goalkeeper. Youth and mixed leagues sometimes go as low as four or as high as seven. Squads are usually larger than the on-pitch number so teams can rotate through rolling substitutions.
What is the difference between indoor football and futsal?
The short version comes down to the surface and the walls:
- Futsal – hard court, marked lines, no walls, a smaller low-bounce ball, and fully standardised by FIFA
- The walled indoor game – artificial turf, boards that keep the ball in play, usually a normal ball, and rules that vary by venue
Futsal rewards close control and passing; the walled indoor game is faster and built on quick transitions.
How long is an indoor football game?
Most indoor football games last under an hour, typically two halves of around 20 minutes on a running clock, sometimes divided into quarters. The exact timing is set by the venue or league, so it varies from one place to the next.
What boots do you wear for indoor football?
Indoor football is played in flat-soled trainers, often sold as indoor court shoes, or in astroturf trainers, not the studded boots you wear on grass. On a sports-hall floor you want a flat, non-marking rubber sole for grip; on astroturf, the short moulded studs known as astros work best. Studded grass boots are usually not allowed, both for grip and to protect the surface.
What size is an indoor football pitch?
A typical indoor football pitch is around 50 by 27 metres, roughly the footprint of an ice-hockey rink, but there is no fixed standard and sizes vary widely by venue. It is far smaller than a full outdoor pitch, which is part of why the indoor game is so much quicker.