More than "indoor football"
Futsal is often assumed to just be football played indoors — but the rules are genuinely different, not just the surface. Understanding these differences matters whether you're playing, coaching, or just watching for the first time.
5-a-side, on a hard court
Futsal is played 5-a-side (4 outfield plus a goalkeeper) on a hard-court surface roughly the size of a basketball court — smaller than even a 5v5 football pitch, with line markings rather than walls.
No offside
Unlike football (where offside applies from 9v9 — see our offside guide), futsal has no offside at all. Attackers can position anywhere, which changes defending fundamentally — there's no "holding a line" to catch attackers out.
Kick-ins, not throw-ins
When the ball goes out over the sideline, it's restarted with a kick-in from the floor — no hands involved at all for outfield restarts.
The 4-second rule
Kick-ins, corners, free kicks, and goal clearances must be taken within 4 seconds, or possession is lost. This single rule shapes much of futsal's fast tempo — there's no "taking a moment" at restarts.
Accumulated fouls
From a team's sixth foul in a half, the opposition gets a direct free kick with no defensive wall allowed — effectively a clear shot from close range. This punishes persistent fouling far more directly than football's approach.
Rolling substitutions
Like ice hockey, players can be substituted continuously through a designated zone — not just at limited stoppages as in football.
Goalkeeper restrictions
The goalkeeper has a time limit to release the ball in their own half and can't handle a deliberate back-pass — encouraging fast, flowing play rather than the keeper holding the ball to slow the game.
Why the differences matter
Every one of these rules pushes toward the same thing: speed, constant involvement, and technical demands in tight space — which is exactly why futsal is such an effective development tool (see our guide on why futsal makes better footballers).