Rule 41.Dismissal of actions

Rule 41(a) gives a plaintiff two ways to walk away from a case without a court order: filing a notice of dismissal before the other side answers or moves for summary judgment, or filing a stipulation signed by everyone who has appeared. Either way, the dismissal is without prejudice unless it says otherwise — with one important exception. If the plaintiff already dismissed the same claim once before in any federal or state court, a second notice of dismissal counts as a decision on the merits, closing the door on a third attempt. Once the case has moved past that early stage, a plaintiff needs a court order to dismiss, on whatever terms the court considers fair, and any counterclaim already pending when the dismissal motion was served stays alive for the court to decide separately.

Rule 41(b) works from the other side. If the plaintiff fails to prosecute the case or ignores the rules or a court order, the defendant can move to dismiss, and that dismissal — like most dismissals not otherwise covered by the rule — counts as a decision on the merits unless it rests on lack of jurisdiction, improper venue, or failure to join a necessary party. The court can also dismiss a stalled case on its own, after giving the parties notice, though that kind of dismissal is without prejudice.

The same dismissal framework applies to a counterclaim, crossclaim, or third-party claim, with the voluntary-dismissal window measured against when the responsive pleading is served or, if there is none, before evidence comes in at a hearing or trial. Finally, Rule 41(d) protects a defendant who gets sued again on a claim the plaintiff already dismissed once: the court can order the plaintiff to cover costs from the earlier suit and can pause the new case until that happens.