How to Respond to a Counterclaim

When a defendant files a counterclaim, the plaintiff has been re-cast as a defendant on the new claim and must file a reply (sometimes called an answer to the counterclaim) within 21 days of service under Federal Rule of Civil Procedure Rule 12(a)(1)(B). The reply must respond to each numbered allegation, assert any affirmative defenses, and may incorporate a motion to dismiss the counterclaim or a motion to strike. Failing to reply within the deadline can result in a default judgment on the counterclaim, a result that surprises plaintiffs who assume the original complaint somehow protects them.

What follows breaks down the timing rules, the structural requirements of a reply, the option of moving to dismiss the counterclaim instead, the affirmative defenses to consider, and the strategic decisions that drive plaintiffs' responses. For background on counterclaims themselves, see our counterclaim explainer.

Timing: 21 Days from Service of the Counterclaim

Under FRCP 12(a)(1)(B), a party must serve a reply to a counterclaim within 21 days after being served with the counterclaim. The deadline is 60 days when the United States or one of its officers or agencies is the counterclaim defendant. The deadline runs from the date of service of the answer-and-counterclaim, which in most jurisdictions is the date the answer is filed and served via the court's electronic filing system.

If the counterclaim plaintiff served the counterclaim with permission of the court (under FRCP 13(e), allowing later-acquired counterclaims), the deadline runs from that service. If the original plaintiff has filed a Rule 12 motion to dismiss the counterclaim, the deadline for a reply runs from notice of the court's action on that motion.

Plaintiffs should calendar the deadline immediately on receipt of the counterclaim and identify any local-rule extensions. A Rule 12 motion automatically extends the time to file the substantive reply, but it does not eliminate the obligation. If the motion is denied or partially denied, the reply must be filed within 14 days under FRCP 12(a)(4)(A).

Structure of a Reply to a Counterclaim

The reply mirrors the structure of an answer:

• Caption. The original case caption, often supplemented with a heading identifying the document as 'Plaintiff's Reply to Defendant's Counterclaim' or 'Reply to Counterclaim.'
• Numbered responses. Each numbered paragraph in the counterclaim must receive a numbered response: admit, deny, or state that the plaintiff lacks knowledge or information sufficient to form a belief about the truth of the allegation (which has the effect of a denial).
• Affirmative defenses. Defenses that, if proven, defeat the counterclaim regardless of the truth of its allegations. These must be pleaded affirmatively or risk waiver under FRCP 8(c).
• Prayer for relief. A request that the court enter judgment for the counterclaim defendant on the counterclaim and award costs and any other appropriate relief.
• Signature block. Same conventions as the original complaint and answer.

The reply does not need to repeat the affirmative-defense or original-claim language from the complaint. It is a standalone responsive pleading directed only at the counterclaim allegations.

Assert Your Own Compulsory Counterclaims in the Reply

An answer to a counterclaim is itself a pleading under FRCP 7(a), so Rule 13(a) applies to it: the pleader must state any compulsory counterclaim it holds against the opposing party. If the plaintiff has a claim against the defendant that arises out of the same transaction or occurrence as the counterclaim and was not already pleaded in the complaint, it must be asserted now, typically by amending the complaint or by pleading it within the reply itself. A same-transaction claim that is left out is barred by claim preclusion once the case reaches judgment, which makes this one of the quieter malpractice traps in responsive pleading. Before filing, confirm that every same-transaction claim is either already pleaded or knowingly reserved.

Move to Dismiss the Counterclaim Instead

Plaintiffs frequently choose to challenge the counterclaim through a Rule 12 motion rather than (or before) filing a reply. The standard grounds map onto Rule 12(b)(1) through (b)(7):

• Lack of subject matter jurisdiction (12(b)(1)). Permissive counterclaims often face independent jurisdiction problems if the federal court lacks diversity or federal question jurisdiction over the counterclaim independently.
• Lack of personal jurisdiction (12(b)(2)). Rare in this posture because the counterclaim plaintiff is the original defendant who has consented to the court's jurisdiction by appearing.
• Improper venue (12(b)(3)). Also rare for the same reason.
• Insufficient process or service (12(b)(4)/(5)). generally not applicable; the counterclaim is served via the answer.
• Failure to state a claim (12(b)(6)). The most common ground. The motion challenges the counterclaim's sufficiency under Twombly, Iqbal, and any heightened pleading rules.
• Failure to join a required party (12(b)(7)). Where the counterclaim cannot proceed without joinder of an absent party under FRCP 19.

A motion to dismiss the counterclaim under Rule 12(b)(6) is a common first move. If granted, the counterclaim is dismissed (often with leave to amend); if denied, the plaintiff has 14 days to file the substantive reply. See our guide on the Rule 12(b) motion to dismiss For the procedural mechanics.

Affirmative Defenses to a Counterclaim

The same affirmative defenses available against a complaint are available against a counterclaim. The most commonly raised in this posture are:

• Statute of limitations. Counterclaims are subject to the same limitations periods as direct claims. A counterclaim that would be untimely as a direct claim is generally untimely as a counterclaim, except that recoupment-style counterclaims (offsets up to the amount of the plaintiff's claim) are typically permitted even after the limitations period has run.
• Failure to mitigate damages. The counterclaim plaintiff has a duty to mitigate; failure to do so reduces recoverable damages.
• Waiver and estoppel. The counterclaim plaintiff's prior conduct may have waived the claim or estopped the counterclaim plaintiff from asserting it.
• Accord and satisfaction. The dispute was resolved by an earlier agreement.
• Release. The claim was released by an earlier settlement or contract.
• Set-off and recoupment. The counterclaim plaintiff owes the plaintiff money on an unrelated claim that should be deducted.
• Failure to state a claim. Even if not raised by Rule 12 motion, this defense survives in the answer.

Plead each defense in a separately numbered paragraph. FRCP 8(c) requires affirmative defenses to be pleaded affirmatively, and a defense not raised in the reply may be waived under the case-management plan or pretrial order.

Default Judgment Risk

If the counterclaim defendant fails to file a reply within the deadline (and does not file a Rule 12 motion to extend it), the counterclaim plaintiff may move for entry of default and, eventually, default judgment under FRCP 55. The procedure: clerk's entry of default under FRCP 55(a), followed by motion for default judgment under FRCP 55(b).

Default judgments on counterclaims are uncommon because plaintiffs typically have counsel who calendar deadlines. They do, however, occur, most often in cases involving pro se parties or in cases where the original counsel withdrew without ensuring transition. Setting aside a default judgment requires a Rule 55(c) motion (for the default itself) or a Rule 60(b) motion (for the default judgment), both of which face elevated standards.

Strategic Considerations

Plaintiffs evaluating their response should consider several strategic dimensions.

Credibility of the counterclaim. If the counterclaim is weak, a Rule 12(b)(6) motion may be the cleanest response, eliminating the claim before discovery. If the counterclaim is plausible, the better course may be to file a substantive reply and litigate the claim on the merits.

Discovery implications. A counterclaim expands discovery in scope and duration. Plaintiffs should anticipate the additional discovery the counterclaim will trigger and prepare accordingly.

Settlement use. A credible counterclaim shifts settlement dynamics. Plaintiffs should reassess their settlement position when a counterclaim is filed, particularly if the counterclaim damages approach the value of the original claim.

Insurance coverage. Some counterclaims (defamation, malicious prosecution, abuse of process) may be covered under the plaintiff's general liability policy. Tender the counterclaim to the insurer immediately on receipt to preserve coverage.

If you need a reply to a counterclaim, a Rule 12 motion against a counterclaim, or strategic guidance on responding, our attorney-drafted procedural pleadings start at $899 with seven-day delivery. Order an attorney-drafted reply Or use our free counterclaim response template.

Frequently Asked Questions

How do you respond to a counterclaim?

You respond by filing a reply (also called an answer to the counterclaim) within 21 days of service. The reply must respond to each numbered allegation in the counterclaim, admit, deny, or state lack of knowledge sufficient to form a belief, and assert any affirmative defenses. You may also file a Rule 12 motion to dismiss the counterclaim instead of (or before) filing the reply. Failing to respond within the deadline risks default judgment on the counterclaim.

How long do you have to reply to a counterclaim in federal court?

Twenty-one days from service of the counterclaim under FRCP 12(a)(1)(B), or 60 days if the United States or its officers or agencies are the counterclaim defendant. If you file a Rule 12 motion against the counterclaim, the deadline for a substantive reply is extended until 14 days after notice of the court's action on the motion. State courts often follow similar timelines but may have local variations.

Can a plaintiff move to dismiss a counterclaim?

Yes. A counterclaim is subject to the same Rule 12(b) defenses as any other claim, including failure to state a claim, lack of subject matter jurisdiction, statute of limitations (where evident from the face of the pleading), and failure to join a required party. Permissive counterclaims often face independent-jurisdiction challenges that compulsory counterclaims do not. A successful motion to dismiss the counterclaim eliminates the claim while leaving the original case intact for adjudication of the plaintiff's claims.

What happens if you don't respond to a counterclaim?

The counterclaim plaintiff may seek a clerk's entry of default under FRCP 55(a) and then move for default judgment under FRCP 55(b). The default judgment is an enforceable money judgment and may be reduced to a writ of execution against the plaintiff's assets. Setting aside a default requires a Rule 55(c) motion (for the default) or a Rule 60(b) motion (for the default judgment), both of which require a showing of good cause or extraordinary circumstances. The safer practice is always to file a timely reply or a Rule 12 motion within the deadline.

Do you have to answer a counterclaim in state court?

Usually yes, but the mechanics vary by state. Many states follow the federal model and require a reply within a set window, often 20 to 30 days. California uses the cross-complaint instead of the counterclaim, and the cross-defendant must file an answer within 30 days of service. A minority of code-pleading states deem the allegations of a counterclaim automatically denied, so no responsive pleading is required unless the court orders one. Check the forum state's rules immediately rather than assuming the federal 21-day clock applies.

Should you notify your insurer when you are hit with a counterclaim?

Yes, and promptly. A counterclaim is a new claim against you, and it may fall within commercial general liability, professional liability, or homeowners coverage even when your own affirmative claim does not. Counterclaims alleging defamation, disparagement, or advertising injury are frequently covered under personal and advertising injury provisions. Most policies require notice as soon as practicable, and late tender can forfeit coverage in many states. Because the insurer's duty to defend is broader than its duty to indemnify, tender the counterclaim even when coverage looks doubtful and get the coverage position in writing.

Can you amend a reply to a counterclaim?

Yes. Under FRCP 15(a)(1), a party may amend a pleading once as a matter of course within 21 days after serving it. After that window, amendment requires the opposing party's written consent or leave of court, which Rule 15(a)(2) directs courts to give freely when justice requires. The most common amendment adds an omitted affirmative defense, which courts routinely allow before significant discovery.