A counterclaim is a claim a defendant files back against the plaintiff inside the same lawsuit. Instead of only defending against the plaintiff’s allegations, you assert your own legal grievance and ask the court for your own relief. Federal Rule of Civil Procedure 13 governs counterclaims in federal court, and most state systems follow a similar structure.1Cornell Law School. Federal Rules of Civil Procedure Rule 13 – Counterclaim and Crossclaim Whether you have a choice about filing one depends on which of two categories it falls into, and that distinction carries real consequences.
The Two Types of Counterclaims
Every counterclaim is either compulsory or permissive, and the label controls whether you must raise it now or can save it for another day.
A compulsory counterclaim arises from the same transaction or event as the plaintiff’s original lawsuit. If you have one, you must assert it in the current case. Skip it, and you forfeit the right to bring that claim later in any court, against anyone. The rule exists to keep parties from splintering a single dispute into multiple lawsuits.1Cornell Law School. Federal Rules of Civil Procedure Rule 13 – Counterclaim and Crossclaim
A permissive counterclaim is anything that doesn’t grow out of the same transaction or occurrence. You can tack it onto the current case for convenience, or you can file a separate lawsuit later. Either path is fine, and there’s no forfeiture risk.1Cornell Law School. Federal Rules of Civil Procedure Rule 13 – Counterclaim and Crossclaim
One narrow exception protects defendants from an impossible situation. If a compulsory counterclaim would require adding a party the court can’t get jurisdiction over, you aren’t forced to raise it and don’t lose the claim.1Cornell Law School. Federal Rules of Civil Procedure Rule 13 – Counterclaim and Crossclaim
A Concrete Example
Say another driver sues you after a car accident, claiming you ran a red light. You believe the other driver was speeding and caused the crash. Your negligence claim against them comes from the same accident, so it’s a compulsory counterclaim. Raise it in this lawsuit or lose it for good.
Now imagine the same plaintiff also owes you $5,000 from an unrelated business deal. That debt has nothing to do with the accident, so it’s a permissive counterclaim. You could add it to this lawsuit, or you could file a separate case later to collect.
When and How to File a Counterclaim
A counterclaim is normally included in your answer to the plaintiff’s complaint. In federal court, you generally have 21 days after being served with the summons and complaint to file that answer, and the counterclaim rides along with it.2Cornell Law School. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections State court deadlines vary, but the structure is similar.
Once drafted, the counterclaim is served on the plaintiff so they have formal notice of the claims against them, then filed with the court clerk. Service follows the court’s rules, which usually permit mail or electronic filing. Filing fees may apply, and most courts allow you to apply for a fee waiver if you can’t afford them.
Treat the answer deadline as the counterclaim deadline. Missing it doesn’t just leave your counterclaim unfiled; it can result in a default judgment on the plaintiff’s original claim against you.
What a Counterclaim Must Contain
A counterclaim follows the same pleading rules as any other claim. Under Federal Rule of Civil Procedure 8, it needs three things: a short, plain statement showing why the court has jurisdiction to hear it, a short, plain statement laying out your claim and showing you’re entitled to relief, and a demand for the specific relief you want.3Cornell Law School. Federal Rules of Civil Procedure Rule 8 – General Rules of Pleading
The relief you ask for can include money damages, an order requiring the plaintiff to do something (like perform a contract), or a court declaration establishing your legal rights. Your counterclaim can seek more money than the plaintiff’s original claim against you. No rule caps your demand to match theirs, and you can request a completely different type of relief than what the plaintiff sought.1Cornell Law School. Federal Rules of Civil Procedure Rule 13 – Counterclaim and Crossclaim
What Happens After You File
Once your counterclaim is served, the plaintiff has to answer it. In federal court, the plaintiff gets 21 days from service to respond.2Cornell Law School. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections If the plaintiff ignores it, you can ask the court to enter a default, and eventually a default judgment, on your counterclaim, the same way the plaintiff could have done if you hadn’t answered.4Cornell Law School. Federal Rules of Civil Procedure Rule 55 – Default; Default Judgment
From then on, the litigation covers both the original claim and the counterclaim together. Discovery runs on all claims at once. Both sides exchange documents, answer written questions, and take depositions on everything in the case. Settlement talks typically address the whole dispute, because resolving one side while the other keeps going defeats the point.
If the case doesn’t settle, the counterclaim is tried alongside the original claim in a single trial. The court hears evidence on both sides and issues one judgment covering the whole dispute.
How a Counterclaim Can Be Knocked Out Early
Filing a counterclaim doesn’t guarantee it survives to trial. The plaintiff can attack it the same way any claim gets attacked at the pleadings stage.
The most common challenge is a motion to dismiss for failure to state a claim. If the plaintiff argues that even accepting your allegations as true, the facts don’t add up to a recognized legal claim, the court can dismiss it before discovery begins.2Cornell Law School. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections The plaintiff can also challenge jurisdiction, arguing that the court lacks authority over the subject matter or over the plaintiff as a counter-defendant. A plaintiff who believes a counterclaim labeled “compulsory” is actually unrelated to the original suit may challenge it on that ground.
These challenges matter because a dismissed permissive counterclaim can usually be refiled elsewhere, while a dismissed compulsory one may be lost entirely if a jurisdictional objection succeeds.
Jurisdiction: A Trap for Permissive Counterclaims
Compulsory and permissive counterclaims get different jurisdictional treatment. A compulsory counterclaim doesn’t need its own independent basis for the court to hear it. Under supplemental jurisdiction, federal courts can hear any claim closely enough related to the original case to form part of the same controversy.5Office of the Law Revision Counsel. 28 U.S. Code 1367 – Supplemental Jurisdiction
Permissive counterclaims are a different story. Because they don’t arise from the same facts, they generally need their own jurisdictional basis. In federal court, that usually means either a federal question or diversity of citizenship with enough money at stake. If your permissive counterclaim can’t meet that threshold, you may have to file it as a separate case in state court. Self-represented litigants often assume that once they’re in court, they can raise any claim they want, and that assumption can be costly.
What You Lose by Skipping a Compulsory Counterclaim
This is where the rules bite hardest. If you have a claim against the plaintiff arising from the same transaction or occurrence as their lawsuit, and you fail to raise it, that claim is barred. You cannot bring it later in a separate lawsuit. The forfeiture is permanent.1Cornell Law School. Federal Rules of Civil Procedure Rule 13 – Counterclaim and Crossclaim
Courts read “same transaction or occurrence” broadly. They look at whether the claims share a logical relationship: overlapping facts, the same parties, the same events. If a reasonable person would expect both disputes to be resolved together, the counterclaim is probably compulsory. When in doubt, raise it. Filing a counterclaim that turns out to be permissive carries no penalty. Failing to file one that was actually compulsory is irreversible.
Are Counterclaim Recoveries Taxable?
If you win money through a counterclaim, the IRS will want to know. The general rule is that all income is taxable regardless of its source, and lawsuit recoveries are no exception.6Internal Revenue Service. Tax Implications of Settlements and Judgments
The major exception is for damages received for personal physical injuries or physical sickness, which are excluded from taxable income as long as they aren’t punitive.7Office of the Law Revision Counsel. 26 USC 104 – Compensation for Injuries or Sickness Lost wages and medical costs flowing from a physical injury also qualify for the exclusion. The same lost wages tied to a non-physical claim like breach of contract or employment discrimination are fully taxable.
Emotional distress damages are taxable unless they stem from a physical injury. Punitive damages are almost always taxable; the only narrow exception involves wrongful death claims in states where punitive damages are the only remedy available.6Internal Revenue Service. Tax Implications of Settlements and Judgments If you settle rather than go to trial, how the agreement characterizes each payment matters. When the agreement is silent, the IRS looks at the intent behind the payment to decide taxability, so the allocation language in a settlement agreement is worth getting right.