Serving a federal complaint: the 90-day deadline, and the cheapest way to extend it

Filing the complaint starts a clock most plaintiffs underestimate. Rule 4(m) runs from the day the complaint is filed, not from when the summons issues, and it runs separately as to each defendant.

The 90 days

FRCP 4(m):

If a defendant is not served within 90 days after the complaint is filed, the court — on motion or on its own after notice to the plaintiff — must dismiss the action without prejudice against that defendant or order that service be made within a specified time. But if the plaintiff shows good cause for the failure, the court must extend the time for service for an appropriate period.

Three things worth separating.

Dismissal is without prejudice — but that is cold comfort if the limitations period has since run, which is the situation the rule most often produces.

Even without good cause, the court has a choice. It "must dismiss … or order that service be made within a specified time." Courts routinely take the second option, but it is discretionary.

With good cause, the extension is mandatory. "[T]he court must extend." Good cause is a real showing, not a formality.

Where the 90 days doesn't apply. Rule 4(m) expressly excludes service in a foreign country under Rule 4(f), Rule 4(h)(2) or Rule 4(j)(1), and service of a notice under Rule 71.1(d)(3)(A). Serving a defendant abroad has no fixed federal deadline.

The cheapest extension is a waiver request

Rule 4(d) is usually a better answer than a motion, and it does two useful things at once.

It gives the defendant longer to answer — 60 days from when the request was sent, or 90 if sent outside any judicial district of the United States (Rule 4(d)(3)) — which is often why a defendant agrees.

It shifts the cost of not agreeing. Rule 4(d)(2): if a defendant located within the United States fails, without good cause, to sign and return a waiver requested by a plaintiff located within the United States, the court must impose the expenses later incurred in making service, plus the reasonable expenses (including fees) of any motion required to collect them.

The request has requirements. It must be in writing, addressed to the defendant (or to an officer, managing or general agent, or other authorized agent for an entity under Rule 4(h)), name the court, be accompanied by a copy of the complaint, two copies of the waiver form and a prepaid means of returning it, inform the defendant of the consequences of waiving and not waiving, state the date sent, allow at least 30 days to return it (60 if sent abroad), and be sent by first-class mail or other reliable means.

Rule 4(d)(4): when the plaintiff files a waiver, proof of service isn't required and the rules apply as if a summons and complaint had been served at the time of filing the waiver.

Rule 4(d)(5): waiving service "does not waive any objection to personal jurisdiction or to venue."

Who may serve, and how

Rule 4(c)(1): a summons must be served with a copy of the complaint, and the plaintiff is responsible for having it served within the Rule 4(m) time and for furnishing the necessary copies.

Rule 4(c)(2): "Any person who is at least 18 years old and not a party may serve a summons and complaint."

Rule 4(c)(3): on the plaintiff's request the court may order service by a U.S. marshal or someone specially appointed — and must so order if the plaintiff is proceeding in forma pauperis under 28 U.S.C. § 1915 or as a seaman under § 1916.

Serving an individual — Rule 4(e)

Unless federal law provides otherwise, an individual (other than a minor, an incompetent person, or one whose waiver has been filed) may be served in a judicial district of the United States by:

(1) Following state law for serving a summons in an action in the courts of general jurisdiction of the state where the district court sits or where service is made.

That first route is broader than people assume — two states' worth of methods are available, and a state's substituted-service provision may reach where the federal methods don't.

(2) Or by delivering a copy to the individual personally; leaving a copy at the individual's dwelling or usual place of abode with someone of suitable age and discretion who resides there; or delivering a copy to an agent authorized by appointment or by law to receive service of process.

Serving an entity — Rule 4(h)

Unless federal law provides otherwise or a waiver has been filed, a domestic or foreign corporation, or a partnership or other unincorporated association subject to suit under a common name, must be served in a U.S. judicial district either in the manner Rule 4(e)(1) prescribes for an individual — i.e. state law — or by delivering a copy of the summons and complaint to an officer, a managing or general agent, or any other agent authorized by appointment or by law to receive service of process. If the agent is one authorized by statute and the statute so requires, a copy must also be mailed to the defendant.

Proof, and defects

Rule 4(l) governs proof of service — generally by the server's affidavit unless service is waived. Rule 4(l)(3) is worth knowing: "Failure to prove service does not affect the validity of service. The court may permit proof of service to be amended."

That is a meaningful distinction. A defective return is usually curable; defective service is a different problem, and it is the ground a defendant raises under Rule 12(b)(5).

The interaction that catches plaintiffs

Rule 4(m) runs from filing. Rule 12(a)(1)(A)(i) gives a served defendant 21 days to answer. A plaintiff who serves on day 89 has complied with Rule 4(m) — but has also spent nearly three months of the case before the defendant's clock even starts.

Where limitations are tight, the sequence matters more than the deadline: filing stops the limitations clock, but a Rule 4(m) dismissal without prejudice can leave a refiled action time-barred.

A short checklist

1. Calendar 90 days from the filing date, per defendant.
2. Send Rule 4(d) waiver requests early — they cost a stamp and can shift service expenses.
3. Check Rule 4(e)(1)'s state-law route if the federal methods aren't working; you may use the law of the forum state or the state where service is made.
4. If the 90 days is running out, move before it expires and be ready to show good cause — that is the only version of the extension the court must grant.
5. Remember foreign service is outside Rule 4(m) entirely.

Where these rules live

• Rule 4 — Summons
• Rule 4.1 — Serving Other Process
• Rule 6 — Computing and Extending Time
• Rule 12 — Defenses and Objections
• Rule 55 — Default; Default Judgment

This page explains what the rules say. It isn't legal advice, and whether a dismissal without prejudice would be fatal in your case depends on limitations law this site doesn't cover.