5-a-Side Football Rules, Explained

5-a-side football is played by two teams of five players each, including a goalkeeper, on a pitch far smaller than a standard 11-a-side football field. It's built for speed and constant touches on the ball rather than the positional, long-build-up game of full-sided football — and a handful of its rules genuinely differ from the 11-a-side game, not just its scale.

Team size and squad

Each side fields five players on the pitch at a time: four outfield players and one goalkeeper. Most recreational leagues and turf bookings allow rolling substitutions, meaning players can be swapped in and out repeatedly through the game rather than a substitution being a one-way, permanent change as in traditional 11-a-side football. This matters practically: a squad of 8-10 players rotating through a 5-a-side game keeps everyone fresh far better than trying to play the whole session with a fixed five.

There's no strict minimum to start a casual game — many recreational groups will play 3v3 or 4v4 if numbers are short — but organized 5-a-side leagues and formats typically require the full complement of five per side, with a minimum number (often three or four) to avoid a forfeit.

Pitch size and goals

5-a-side pitches are considerably smaller than full-size football fields — commonly somewhere in the range of 25-42 metres long by 15-25 metres wide, though exact dimensions vary by venue and governing format (indoor arena, outdoor turf, or a specific league's regulation size). Goals are correspondingly smaller than 11-a-side goals, sized to match the reduced pitch and the shorter shooting distances involved.

Because dimensions aren't as rigidly standardized as full-size football, it's worth checking a specific venue's pitch size if precise measurements matter to you — most turf operators will state it in their venue listing.

Duration and format

Games are typically played in two halves, commonly somewhere between 15 and 25 minutes per half depending on the venue or league, with a short break in between. Recreational bookings are usually structured around the hour-long slot rather than a fixed match length — many groups simply play continuously for the duration of their booked slot, splitting into shorter mini-games if the group is large enough to rotate teams.

The big rule difference: no offside

This is the rule that trips up players coming from 11-a-side football most often: most 5-a-side formats have no offside rule at all. Players can position themselves anywhere on the pitch, including camping near the opponent's goal, without being flagged. This is a deliberate design choice — the small pitch and low player count make offside largely unnecessary as a tactical tool, and removing it keeps the game faster and simpler to referee (most recreational games are self-officiated or lightly officiated anyway).

Some formal leagues do apply modified offside rules, so if you're playing in an organized league rather than a casual turf booking, it's worth confirming with the organizers.

Other common rule differences

A few other things regularly catch first-timers off guard:

• Kick-ins instead of throw-ins. Many 5-a-side formats (this varies by league and region) replace the throw-in with a kick-in taken from the sideline, keeping the ball on the ground and the game moving faster.
• No slide tackles, in many recreational and indoor formats. Given the smaller, harder playing surface and closer proximity of players, a lot of 5-a-side venues and leagues discourage or outright ban sliding tackles as a safety rule, favouring standing tackles instead. This isn't universal — check your specific venue or league's rules — but it's common enough to assume by default on turf.
• Back-pass and goalkeeper restrictions. Some formats restrict goalkeepers from picking up deliberate back-passes with their hands, mirroring the 11-a-side rule, though enforcement in casual games is inconsistent.
• Smaller, lighter ball in some formats, particularly futsal (a distinct but related small-sided format played with a low-bounce ball on a hard court rather than turf) — worth noting if you hear the term used interchangeably with 5-a-side, since the equipment and some rules genuinely differ.

Common fouls

The foul list overlaps heavily with standard football — tripping, pushing, handball, dangerous tackles — but a few are called more strictly in 5-a-side because of the tighter playing space:

• Sliding tackles, where prohibited, are called as fouls regardless of whether contact is made with the ball first, since the safety concern is the slide itself in a crowded space.
• Dangerous or reckless challenges are typically penalized faster than in 11-a-side, given how little space there is to recover from a mistimed tackle.
• Handball follows the same general principle as 11-a-side: deliberate handling of the ball, or an unnatural arm position that gains an advantage, is a foul.
• Back-to-goalkeeper infractions, where applicable to the format being played, are called when a goalkeeper handles a deliberate pass back from a teammate's foot.

Most fouls result in a free kick or, for a goal-area infringement, a penalty kick from a spot marked closer to goal than a full-size penalty spot, reflecting the smaller pitch.

Playing your first game

None of this needs to be memorized before you turn up — most recreational 5-a-side games are refereed loosely by the players themselves, and any confusion usually gets sorted out by whoever's been playing longest. The one rule genuinely worth knowing in advance is the no-offside point, since it changes how you should actually play: don't hang back defending an offside trap that doesn't exist.

If you haven't booked a slot yet, the complete guide to booking sports venues covers how turf booking works end to end, and our first-timer's booking guide walks through sizing your group and what to bring. Once you've got a slot and a squad, the rules above are really all you need to play a clean, fair game.