A counterclaim is a claim that a defendant asserts against the plaintiff in the same lawsuit. Instead of filing a separate case, the defendant responds to being sued by raising its own allegations and asking the court for relief. Counterclaims keep related disputes in one proceeding, which can save time and prevent inconsistent results. The rules that govern them come mainly from Rule 13 of the Federal Rules of Civil Procedure, and most states have similar provisions.
Counterclaim, Crossclaim, and Affirmative Defense
These three terms are easy to confuse. A counterclaim is aimed at the plaintiff. A crossclaim is aimed at another party on the same side of the case, such as a codefendant. An affirmative defense does not seek relief from the other party; it asks the court to reject the plaintiff's claim even if the facts are true, as with a statute of limitations defense.
| Filing | Who files it | Who it targets | Seeks relief? |
|---|---|---|---|
| Counterclaim | Defendant | Plaintiff | Yes |
| Crossclaim | A party | Another party on the same side | Yes |
| Affirmative defense | Defendant | Plaintiff's claim | No, it defeats a claim |
Compulsory Counterclaims
Under Rule 13(a), a counterclaim is compulsory when it arises out of the same transaction or occurrence as the plaintiff's claim and does not require adding another party the court cannot bring in. A compulsory counterclaim must be raised in the pending case. If the defendant fails to assert it, the claim is generally barred in a later lawsuit. The policy behind the rule is to resolve a single dispute in a single case rather than forcing parties to litigate it piece by piece.
Courts decide whether claims share a "transaction or occurrence" by looking for a logical relationship between them. A broad reading usually brings related events into one case.
Permissive Counterclaims
A permissive counterclaim, governed by Rule 13(b), does not arise from the same transaction or occurrence. The defendant may bring it in the current case but is not required to. Because it is unrelated, the court must have an independent basis for jurisdiction over it. In federal court, a permissive counterclaim generally needs its own ground for subject matter jurisdiction, such as diversity of citizenship or a federal question. A compulsory counterclaim, by contrast, can fall within the court's supplemental jurisdiction under 28 U.S.C. § 1367.
Compulsory vs Permissive at a Glance
| Compulsory | Permissive | |
|---|---|---|
| Relationship to plaintiff's claim | Same transaction or occurrence | Unrelated |
| Must the defendant file it? | Yes, or it may be waived | No |
| Jurisdiction | May use supplemental jurisdiction | Needs an independent basis |
| Rule | Rule 13(a) | Rule 13(b) |
Relief Beyond the Original Claim
Rule 13(c) confirms that a counterclaim may seek more relief than the plaintiff demands, and it may ask for relief of a different type. A defendant who believes the plaintiff actually owes money can counterclaim for that amount. If the counterclaim exceeds the court's jurisdictional limit, a limited-jurisdiction court may need to transfer the case or the parties may need to proceed elsewhere.
Timing and Procedure
Counterclaims are usually filed with the answer, within the time allowed to respond to the complaint. If a party learns of a counterclaim later, it can seek leave to amend under the rules, which courts often grant when there is no unfair delay or prejudice. A counterclaim is pleaded like any other claim: it must state facts that support each element and a demand for relief. The plaintiff then has a chance to reply to the counterclaim.
Default and Dismissal
A counterclaim is a separate claim for procedural purposes. If the plaintiff fails to respond to a counterclaim, the defendant may seek a default judgment on it. If the plaintiff voluntarily dismisses the original claim, the counterclaim may survive, depending on the rules and the circumstances. Courts sometimes treat a counterclaim as an independent action for purposes of jurisdiction and finality.
Why Counterclaims Matter
Failing to raise a compulsory counterclaim can permanently bar it. Raising a weak or unrelated counterclaim can complicate a case and add cost. For a defendant, the decision is strategic as well as procedural. It affects leverage in settlement, the scope of discovery, and the issues the jury or judge will decide.
Setoff and Recoupment
Two older concepts are related to counterclaims. A setoff is a defendant's demand that reduces the plaintiff's recovery by a separate debt the plaintiff owes the defendant. Recoupment is narrower: it reduces the plaintiff's recovery based on a claim arising from the same transaction. Modern procedure usually folds these into counterclaims, but the labels still appear in some statutes and older cases, and they can matter for jurisdiction and for the scope of the judgment.
Practical Steps for a Defendant
A defendant who may have a claim against the plaintiff should act early. Read the complaint carefully, identify every event that connects to the dispute, and compare each potential claim to the transaction or occurrence test. Calendar the deadline for the answer, because a compulsory counterclaim filed late may be rejected. Gather documents and messages that support the claim, and state the facts and the relief requested clearly. If the claim is unrelated, confirm that the court has jurisdiction over it before filing. When the stakes are significant, a lawyer can assess whether a counterclaim strengthens settlement leverage or simply adds cost.
Where to Learn More
The Federal Rules of Civil Procedure are published by the federal courts at uscourts.gov and are available through the Government Publishing Office at govinfo.gov. Cornell's Legal Information Institute at law.cornell.edu hosts the text of Rule 13. State court systems publish their own civil rules, and many state rules track the federal language. Because procedure is jurisdiction-specific, confirm the rule that applies in your court.
This guide is general legal information, not legal advice. Procedural rules and deadlines are strict, so consult a licensed attorney about a specific case.
Counterclaims vs. Affirmative Defenses
A counterclaim is a claim for relief, not merely a denial. An affirmative defense says the plaintiff should lose even if the allegations are true, such as an expired statute of limitations or contributory fault. A counterclaim, by contrast, asks the court to grant the defendant something, often money. The distinction matters because counterclaims must be pleaded and proven, can support a separate judgment, and in some courts must arise from the same transaction as the original claim. Failing to raise a compulsory counterclaim can bar it in a later lawsuit, so defendants should assess counterclaims early.