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Rule 126.Responses to the complaint

Part XV: Rules Governing Actions Subject to Summary Proceedings for Commercial Disputes · Last amended April 1, 1994 · Last verified July 28, 2026

In one sentenceRule 126 gives a defendant thirty days to answer a Summary Proceedings complaint along with any compulsory counterclaims, gives a plaintiff twenty days to reply to a counterclaim, bars cross-claims and permissive counterclaims absent agreement, and sets a tight, page-limited briefing schedule for motions to dismiss.

Full Text of Rule 126

Text sizeJump to: (a) (b) (c)

(a) Answer. A defendant shall serve an answer together with any compulsory counterclaims within thirty days after service of the complaint.
(b) Counterclaims, cross-claims and third-party claims. A plaintiff shall serve a reply to any counterclaim within twenty days after service of the counterclaim. Any answer or reply to a counterclaim shall be accompanied by a list of persons consulted, or relied upon, in connection with preparation of the answer or reply. Cross-claims, permissive counterclaims and third-party claims are not permitted absent agreement of all parties. Cross-claims, counterclaims and third-party claims, if any, are subject to the provisions of Rules 124 through 131.
(c) Motions to dismiss. A party may, in lieu of an answer, respond to a complaint or counterclaim by moving to dismiss. A motion to dismiss and accompanying brief must be served within thirty days after service of the complaint upon the defendant. A motion to dismiss a counterclaim and accompanying brief must be served within twenty days after service of the counterclaim. An answering brief in opposition to a motion to dismiss is due within fifteen days after service of the motion and accompanying brief. A reply brief in support of the motion to dismiss is due within ten days after service of the answering brief. The opening and answering briefs shall be limited to twenty-five pages, and the reply brief shall be limited to ten pages. Within thirty days after the filing of the final reply brief on all motions to dismiss, if no oral argument occurs, or within thirty days of oral argument if oral argument occurs, the Court will either render to the parties its decision on such motions or will provide to the parties an estimate of when such decision will be rendered. Such additional time shall not normally exceed an additional thirty days unless the assigned judge shall have filed a certification pursuant to Rule 130(d). If a motion to dismiss a claim is denied, an answer to that claim shall be filed within ten days of such denial.

Amendment History

Added, effective Apr. 1, 1994.

Plain-English Summary

Rule 126(a) sets the defendant's clock: an answer, together with any compulsory counterclaims, is due within thirty days of service of the complaint. Rule 126(b) sets the plaintiff's clock for a counterclaim: a reply is due within twenty days of service of the counterclaim, and that reply — like the answer itself — has to come with a list of everyone consulted or relied on in preparing it. Cross-claims, permissive counterclaims, and third-party claims aren't allowed unless every party agrees; whatever counterclaims, cross-claims, or third-party claims do go forward stay subject to Rules 124 through 131.

Rule 126(c) lets a party respond to a complaint or counterclaim with a motion to dismiss instead of an answer, and it lays out a full briefing schedule: the motion and opening brief are due within thirty days of service of the complaint (twenty days for a counterclaim), the answering brief is due fifteen days after that, and the reply brief is due ten days after the answering brief. Opening and answering briefs run no longer than twenty-five pages; the reply tops out at ten. If a motion to dismiss a claim gets denied, the answer to that claim is due within ten days of the denial.

The Court moves fast on its end too. Within thirty days of the final reply brief — or within thirty days of oral argument, if the parties argue the motion — the Court either issues its decision or tells the parties when to expect it. That extra time normally caps out at another thirty days, unless the assigned judge has filed the certification Rule 130(d) allows for complex or heavily loaded cases.

Frequently Asked Questions

How long does a defendant have to answer a Summary Proceedings complaint?

Thirty days from service, and the answer must include any compulsory counterclaims, under Rule 126(a).

Can a defendant file a cross-claim or bring in a third party without the plaintiff's agreement?

No. Rule 126(b) bars cross-claims, permissive counterclaims, and third-party claims unless every party agrees to allow them.

How long do I have to respond to a motion to dismiss?

An answering brief is due fifteen days after the motion and opening brief; a reply brief in support of the motion is due ten days after that.

Is there a page limit on motion to dismiss briefing?

Yes. Opening and answering briefs are limited to twenty-five pages each, and the reply brief is limited to ten pages.

How quickly will the Court rule on a motion to dismiss?

Within thirty days of the final reply brief, or within thirty days of oral argument if argument occurs, the Court either decides the motion or tells the parties when to expect a decision — usually within another thirty days at most.

Source & verification. Rule text is reproduced verbatim from the Delaware Rules of Civil Procedure for the Superior Court, adopted by the Superior Court of the State of Delaware. Last verified July 28, 2026. · Official source
Also known as: delaware motion to dismiss commercial disputes deadlineanswer deadline summary proceedings delawarecompulsory counterclaim delaware business courtcommercial disputes briefing page limits