How Many Days to Respond to a Complaint in Federal Court

01 / PRACTICE NOTES

Count 21 days from the day after service and roll the last day forward.

Rule 12(a)(1)(A)(i) requires a defendant to serve its answer within 21 days after being served with the summons and complaint. Rule 6(a)(1) supplies the count: exclude the day of service, count every day that follows, including intermediate Saturdays, Sundays and legal holidays, and include the last day. When the last day is a Saturday, Sunday or legal holiday, the period continues to run until the end of the next day that is none of those.

Take a process server who hands the summons and complaint to your client on Thursday, November 5, 2026. Day one is Friday, November 6, and day 21 is Thursday, November 26, 2026, which is Thanksgiving. Rule 6(a)(1)(C) carries the deadline to the end of Friday, November 27, 2026. The calculator shows each skipped day with its reason, so you can read the count line by line before you calendar it.

Each defendant counts from its own service date. When co-defendants are served on different days, the rule gives each one 21 days after being served, so a single case can carry several answer dates. Use the date on the proof of service for each defendant, and keep the proof with the date.

02 / PRACTICE NOTES

Waiver, the United States and a Rule 12 motion each set their own period.

A defendant that timely waives service under Rule 4(d) answers within 60 days after the request for a waiver was sent, or within 90 days after it was sent to a defendant outside any judicial district of the United States. The United States, a federal agency or an officer or employee sued only in an official capacity answers within 60 days after service on the United States attorney, and an officer or employee sued in an individual capacity answers within 60 days after service on the officer or on the United States attorney, whichever is later.

A Rule 12 motion changes the schedule. Rule 12(b) provides that a motion asserting any of its defenses must be made before pleading if a responsive pleading is allowed, and serving that motion alters the 21 days. If the court denies the motion or postpones its disposition until trial, the responsive pleading is due 14 days after notice of the court's action. If the court grants a motion for a more definite statement, it is due 14 days after the more definite statement is served.

An amended complaint opens a new response window. Under Rule 15(a)(3), the response to an amended pleading is due within the time remaining to respond to the original pleading or within 14 days after service of the amended pleading, whichever is later. Run the calculator again with the service date of the amended pleading and 14 days, and compare the result with the time remaining on the original period.

03 / PRACTICE NOTES

Calendar the answer date in six steps.

The sequence below fits a first-day review of a newly served complaint, and it produces a date a second lawyer can check.

1. Find the proof of service or the return of service and record the date and the person served.
2. Confirm that the summons and complaint were served together under Rule 4, and note any waiver request.
3. Enter the service date and the 21-day period in the calculator above.
4. Add the legal holidays of the state where the district court sits and any date on which the clerk's office was inaccessible.
5. Compare the result with the court's standing orders and any stipulation already on file.
6. Calendar the due date as a task in the case, with the proof of service attached.

04 / PRACTICE NOTES

Extensions, defaults and the filing cutoff are all in the rules.

Rule 6(b)(1)(A) lets the court extend the time for good cause, with or without a motion or notice, when the request is made before the original time or its extension expires. After the time has expired, Rule 6(b)(1)(B) requires a motion and a showing of excusable neglect. A stipulated extension is worth presenting to the court so the new date appears in an order.

When a defendant has failed to plead or otherwise defend, Rule 55(a) directs the clerk to enter the party's default, and Rule 55(c) lets the court set aside an entry of default for good cause. The simplest protection is the calendar: a task due before the answer date, with the draft attached.

The last day ends at midnight in the court's time zone for electronic filing, and when the clerk's office is scheduled to close for filing by other means, unless a statute, local rule or court order sets a different time (Rule 6(a)(4)). When the clerk's office is inaccessible on the last day, Rule 6(a)(3) extends the time to the first accessible day that is not a Saturday, Sunday or legal holiday. For periods measured after an event, Rule 6(a)(6)(C) counts as a legal holiday any day declared a holiday by the state where the district court is located, so add those dates in the calculator.

05 / PRACTICE NOTES

RuleX keeps the answer deadline in the case, next to its source.

Create the case in RuleX, add a task for the answer deadline with the calculated due date, and attach the summons, the complaint and the proof of service. The case log records the rule, the trigger date and the holidays you applied, so every lawyer on the matter reads the same calculation and can reopen the source behind it.

Open the complaint beside the task and ask RuleX to draft the answer in Word from the allegations in the file. Research, drafting and the calendar date live in one case file with the documents, and the 7-day free trial lets you set up your first matter today.