What happens if the ball moves after a practice swing?
If your practice swing moves the ball, that's a 1-stroke penalty under Rule 9.4b and you must replace the ball before playing. The one exception: on the tee before your first stroke, you can re-tee with no penalty at all, even if the swing knocked it clean off the peg.
The situation
You take a practice swing and your club catches the grass near the ball, causing it to roll. Or you swipe through the air and the wind from the club head is enough to move the ball an inch.
The rule
Under Rule 9.4b, if your practice swing causes the ball to move, it's a 1-stroke penalty and you must replace the ball. There is one important exception: in the teeing area before you make your first stroke on the hole, you may re-tee the ball with no penalty even if a practice swing knocked it off the tee (Rule 6.2b). Outside the teeing area, the 1-stroke penalty applies.
Real example
You're in the fairway, take a practice swing through the grass about a foot behind the ball, and the follow-through accidentally clips the ball, rolling it two feet forward. 1-stroke penalty — replace the ball in the original spot, then play your shot.
What to do on the course
- On the tee (first stroke): no penalty — re-tee and play
- Anywhere else: add 1 penalty stroke and replace the ball before playing
- The practice swing itself does not count as a stroke (you had no intention of hitting the ball)
- Only the penalty stroke is added — your next shot is played from the replaced position
Penalty
1-stroke penalty (except in the teeing area before the first stroke of the hole, where there is no penalty).
Exceptions that change the answer
- The player lifts the ball or causes it to move under a Rule that permits lifting or moving it → No penalty; the ball must be replaced on its original spot, or the player may drop or place it elsewhere as allowed
- The player accidentally moves the ball while searching for or identifying it → No penalty (Rule 7.4 applies)
- The player accidentally moves the ball on the putting green → No penalty (Rule 13.1d applies, regardless of how it happened)
Frequently asked questions
Does a practice swing count as a stroke if it hits the ball?
No, a practice swing is never a stroke because you had no intention of hitting the ball. You only pick up 1 penalty stroke under Rule 9.4b for causing the ball to move — the swing itself doesn't count toward your score.
Can I practice putting on the green after I've finished the hole?
Yes, but only in specific spots. Rule 5.5b allows practice putting or chipping on the green you just completed, any practice green, or the next teeing area — never from a bunker and never if it delays play. For the full details, see Can I practice putting after finishing a hole?.
Do I have to replace the ball or can I play it from where it ended up?
You must replace the ball at its original spot before playing. Playing from the wrong place would be an additional breach, so always put it back first.
What if a practice swing on the tee knocks the ball off the tee peg?
No penalty at all. Rule 6.2b covers you in the teeing area before your first stroke on the hole — just re-tee and carry on. This applies whether the ball falls off the tee from a practice swing, a gust of wind, or you simply bump it while addressing it. For the full details on that specific teeing-area scenario, see my ball fell off the tee before I swung — what now?. (If you're unsure whose turn it is to hit that first tee shot, see who has the honour on the tee.)
What if the wind from my club head moves the ball during a practice swing?
Same rule applies: if your practice swing caused the ball to move — even just from the air movement — it's a 1-stroke penalty under Rule 9.4b and you replace the ball. The cause doesn't have to be direct contact.
What if I'm not sure whether my practice swing actually moved the ball?
If there's genuine doubt about whether the ball moved at all, no penalty is applied. But if you saw or felt it move, even a tiny amount, Rule 9.4b kicks in and you replace it and take the stroke.