You throw the ball. It curves off the sideline before reaching the pallino. Was it in play, or is it dead? What if your foot crossed the line at the moment of release? What if your ball hits an opponent's ball that's already come to rest? These are the questions that turn casual games into arguments and league matches into judge calls. Here's how the rules actually work.
This guide covers foul line and dead ball rulings under both USBF Open Rules (the standard in most US sanctioned play) and FIB Punto-Raffa-Volo rules (used at international competition). Where the two disagree, we call it out. For casual backyard play, house rules override everything below, but knowing the sanctioned version makes your house rules more coherent.
Key takeaways
- A foot fault is called when any part of the foot is on or over the line at the moment of release. Momentum forward after release is legal.
- Under USBF Open Rules, a foot-faulted ball is dead but the throw still counts against your team's four balls. FIB rules can escalate to warnings and frame loss.
- Balls that cross the sideline during roll are dead. Ball-to-ball collisions in play are legal, and all balls remain in their new positions.
- A resting ball moved by outside interference (a dog, a spectator) is restored to its original position.
- House rules override everything in casual play, but knowing the sanctioned version makes your house rules more coherent.
The court geometry the rules assume
Every foul-line ruling assumes you know where the lines are. A regulation court is 60 to 91 feet long by 8 to 13 feet wide. The foul line (also called the 4-meter line) sits 4 meters, about 13 feet, from the back wall on each end. The thrower's feet must stay behind that line at the moment of release. The back line, 2 meters past where the pallino stops, marks the boundary past which balls become dead. For a full breakdown of court dimensions and how they affect play, see our Bocce Court Dimensions Guide.
Court layout, viewed from above (60 ft long, 12 ft wide)
┌───────────────────────────────────────────────────────┐
│ ← back wall ● pallino foul line │
│ │
│ ○ dead ball ○ in play ● ○ ← 4 m (13 ft) ──│
│ │
└───────────────────────────────────────────────────────┘
receiving end throwing end
What counts as a foot fault
A foot fault is called when any part of the thrower's foot is on or over the foul line at the moment the ball is released. Momentum carrying you forward after release is legal. The rule applies only to the instant your fingers leave the ball. In USBF Open Rules, the consequence is that the thrown ball is declared dead and removed from the court, but the throw still counts against the team's four-ball allocation. FIB rules are stricter: repeated foot faults can result in loss of the frame.
The most common way to accidentally foot-fault is to lean forward through the throw motion until the front foot rolls onto the line. If you're calling your own games, watch for this pattern in yourself and others. A clean release should have your weight balanced behind the line, not driving through it. For technique to avoid this, see our Bocce Tips for Throw Accuracy.
When a ball is out of bounds
A ball is out of bounds, and therefore dead, if it crosses the sideline before coming to rest, crosses the back line past the pallino, or leaves the court entirely. On walled courts, this rarely happens because the side rails contain the ball. Instead you'll get deflections that keep the ball in play. On open courts marked only by rope or chalk, out-of-bounds calls are common and are usually made by the throwing team or, in leagues, by a spotter at the receiving end.
Casual play override
Most backyard games treat a ball that stops within 12 inches of the line as "in" regardless of whether it briefly crossed the line during roll. Sanctioned play doesn't allow this. The moment of crossing is what matters, not the resting position.
What happens when balls collide
If your ball strikes another ball that has already come to rest, all balls remain in play in their new positions. This is called a raffa hit in Italian tradition, and it's a core strategic tool. You can knock an opponent's ball away from the pallino to open scoring space for your team. The one exception is if the collision causes any ball to leave the court, in which case that ball is dead but the rest stay.
If your ball strikes the pallino itself, the pallino moves and the game continues around its new position. This is the basis of the more advanced punto-raffa strategy, where you deliberately move the pallino to a location that favors your existing balls. See our Bocce Strategy for Beginners guide for how to think about this in a game context.
Dead balls under outside interference
A ball that hits anything not part of the court, like a dog running through, a spectator's chair, or a garden hose left out, is a dead ball and is removed. If the interference happens before the ball comes to rest, most rulesets allow a re-throw. If the interference happens to a ball that has already stopped and is subsequently displaced by outside interference, the ball is restored to its original position. This is why judges use chalk marks around resting balls in tournament play, and why measurement disputes need careful handling. Our guide to measuring close calls covers how officials handle those restorations.
Quick reference
| Scenario | USBF Open Rules | FIB Rules |
|---|---|---|
| Foot on or over line at release | Ball dead, throw counts | Ball dead; repeats = warning |
| Ball crosses sideline during roll | Dead | Dead |
| Ball passes back line | Dead | Dead |
| Ball-to-ball collision in play | All balls remain | All balls remain |
| Outside interference during roll | Re-throw allowed | Judge's discretion |
| Resting ball moved by outside force | Restore to original position | Restore to original position |
Equipment notes for enforcement
Enforcing these rules cleanly requires two pieces of equipment most casual courts skip: a visible foul line and a measuring tool. Painted lines on packed clay work best for tournaments. For backyard play, a length of yellow rope stretched across the court and pinned at each side does the job. For measurement, a soft cloth tape stays flexible around ball curves in ways a rigid ruler cannot.
Serious players who want the rulebook itself, printed, use the Official USBF Open Rules book. It runs about 40 pages and covers every edge case we've mentioned above and about thirty more.
Frequently asked questions
Does the foul line rule apply to the pallino throw?
Yes. The player throwing the pallino must also stay behind the foul line at release. A foot-faulted pallino throw is redone, and if it fails again, the opposing team throws the pallino.
What if my ball rolls back into play after crossing the line?
Once it crosses, it's dead. Even if it rolls back on its own or is deflected back by a wall, it stays out.
Can I appeal a foot fault call?
In league and tournament play, appeals go to the head judge. In casual play, the standard resolution is a re-throw when the fault is disputed.
Do these rules apply to bocce volo?
Mostly. Volo (aerial throw) uses the same foul line and dead ball rules, but the release point counts as when the ball leaves the hand at the top of the throwing arc, not at the ground.
