FRCP 6(b)(1)(B): Extending a Missed Deadline

Q: What counts as excusable neglect under Rule 6(b)?

Courts apply the flexible standard from Pioneer Investment Services Co. v. Brunswick Associates (1993), weighing the danger of prejudice to the other side, the length of the delay and its impact, the reason for the delay and whether it was in the party's control, and whether the party acted in good faith. Ordinary carelessness can qualify, but a deliberate or unexplained delay usually will not.

By Steve Levine · Updated July 19, 2026 · 6 min read

Quick Answer

Federal Rule of Civil Procedure 6(b)(1)(B) lets a federal court, for good cause, extend a deadline on a motion made after the time to act has already expired — but only if the party's failure to act was the result of excusable neglect. It is the "I missed the deadline, please still let me do it" rule. Asking before the deadline (under 6(b)(1)(A)) requires only good cause; asking after adds the excusable-neglect requirement, judged under the Pioneer factors. And Rule 6(b)(2) puts several post-trial and post-judgment deadlines completely off-limits — they can't be extended this way at all.

On this page

What the Rule Says
Before vs. After the Deadline
The Excusable-Neglect Standard
Deadlines Rule 6(b) Can't Touch
Why It Matters in Class Actions
Frequently Asked Questions

What the Rule Says

Rule 6(b) is the federal rule on extending time. It provides that when an act may or must be done within a specified time, the court may, for good cause, extend that time. Subsection (1) splits into two paths depending on when you ask:

• 6(b)(1)(A) — the court may extend "with or without motion or notice if the court acts, or if a request is made, before the original time or its extension expires."
• 6(b)(1)(B) — the court may extend "on motion made after the time has expired if the party failed to act because of excusable neglect."

In short, 6(b)(1)(B) is the mechanism for asking the court to accept a late act — filing a response, serving a document, meeting a court-ordered deadline — after the clock has already run out.

Before vs. After the Deadline

The single most important thing to understand about Rule 6(b) is that timing changes the burden. If you see the problem coming and move before the deadline, you only need to show good cause — a relatively forgiving standard, and the court can even act without a formal motion. If you move after the deadline has passed, you must show good cause and that the missed deadline was caused by excusable neglect. That second requirement is a real hurdle, and it is entirely avoidable by asking early. The practical lesson for any party or self-represented litigant is simple: if you might miss a deadline, request the extension before it expires rather than after.

The Excusable-Neglect Standard

"Excusable neglect" under Rule 6(b) is measured by the same test the U.S. Supreme Court laid down in Pioneer Investment Services Co. v. Brunswick Associates Ltd. Partnership, 507 U.S. 380 (1993). The Court explained that "neglect" is not limited to circumstances beyond a party's control — it can include ordinary carelessness — and that whether the neglect is "excusable" is an equitable judgment made by weighing all the relevant circumstances. The recognized factors are:

• Prejudice to the opposing party if the extension is allowed.
• Length of the delay and its potential impact on the proceedings.
• Reason for the delay, including whether it was within the party's reasonable control.
• Good faith of the party seeking the extension.

This is the same standard that governs Rule 60(b)(1), which is why the two rules are so often analyzed side by side. The difference is what stage of the case you are in: Rule 6(b)(1)(B) applies to a live deadline before final judgment, while Rule 60(b)(1) applies after a final judgment or order already exists.

Deadlines Rule 6(b) Can't Touch

Rule 6(b)(2) carves out a hard-edged list of deadlines a court must not extend, no matter how good the excuse. A court may not extend the time to act under:

• Rule 50(b) and (d) — renewed motion for judgment as a matter of law, and related motions.
• Rule 52(b) — motion to amend or make additional findings.
• Rule 59(b), (d), and (e) — motion for a new trial and motion to alter or amend a judgment.
• Rule 60(b) — motion for relief from a judgment or order.

These are the major post-trial and post-judgment motions, and their deadlines are treated as firm because they interact with the strict clock for filing an appeal. If one of these deadlines is missed, Rule 6(b) is not a rescue — that is a key reason the deadlines in this list get flagged so heavily in practice.

Why It Matters in Class Actions

Rule 6(b)(1)(B) is a general litigation tool rather than a class-action-specific one, but it runs under the surface of every case. It is what a party relies on when it needs the court to accept a late filing, and it is the reason lawyers push hard to request extensions before a deadline lapses. For a class member, the rule is most useful as a concept: deadlines in litigation are not always absolute, but getting relief after one passes requires a genuine, well-explained reason — the court is not obligated to forgive a missed date.

If you are a class member who missed a settlement deadline — a claim-filing cutoff, an opt-out date, or an objection deadline — Rule 6(b) is usually not your direct path. Those deadlines are set by the settlement and the court's orders, and the normal first step for a late claim is to contact the settlement administrator promptly and explain what happened. Whether any procedural rule could extend a specific class deadline is fact-specific, and acting quickly matters, because delay itself undercuts an excusable-neglect argument. When it counts, talk to a lawyer or class counsel.

Frequently Asked Questions

What is Rule 6(b)(1)(B)?

Rule 6(b)(1)(B) of the Federal Rules of Civil Procedure lets a federal court, for good cause, extend a deadline on a motion made after the time to act has already expired — but only if the party failed to act because of excusable neglect. It is the rule you use when a deadline has already been missed and you are asking the court to accept the late act anyway.

How is 6(b)(1)(B) different from 6(b)(1)(A)?

The difference is timing. Under 6(b)(1)(A), if you ask before the deadline runs out, you only need to show good cause, and no excusable neglect is required. Under 6(b)(1)(B), if you ask after the deadline has passed, you must show both good cause and that the failure to meet the deadline was the result of excusable neglect. Asking early is far easier than asking late.

What deadlines can't be extended under Rule 6(b)?

Rule 6(b)(2) says a court must not extend the time to act under several specific rules: Rules 50(b) and (d), 52(b), 59(b), (d), and (e), and 60(b). These are mostly post-trial and post-judgment motions — for example, motions for a new trial, to alter or amend a judgment, and for judgment as a matter of law. Those deadlines are firm and cannot be enlarged through Rule 6(b).

What counts as excusable neglect under Rule 6(b)?

Courts apply the flexible standard from Pioneer Investment Services Co. v. Brunswick Associates (1993), weighing the danger of prejudice to the other side, the length of the delay and its impact, the reason for the delay and whether it was in the party's control, and whether the party acted in good faith. Ordinary carelessness can qualify, but a deliberate or unexplained delay usually will not.

Can Rule 6(b)(1)(B) extend a class action claim or opt-out deadline?

Not directly, as a general matter. Deadlines to file a claim or to opt out of a class settlement are set by the settlement agreement and the court's scheduling orders, and the normal path for a late claim is to contact the settlement administrator or the court overseeing the settlement. Rule 6(b) governs deadlines set by the rules, a court order, or a statute; whether it applies to a particular class deadline is a fact-specific legal question. This page is general information, not legal advice.

Sources

• Cornell Legal Information Institute — Federal Rule of Civil Procedure 6 (Computing and Extending Time)
• Cornell Legal Information Institute — Federal Rule of Civil Procedure 60 (Relief From a Judgment or Order)
• Justia — Pioneer Investment Services Co. v. Brunswick Associates, 507 U.S. 380 (1993)

About This Page

General informational summary of a federal procedural rule, not legal advice. Rule 6(b)(1)(B) is applied by the federal courts, and outcomes turn on the specific facts of each case and can vary by circuit; some state courts have their own analogs that differ. Anyone facing a missed deadline should read the current text of the rule and consult a licensed attorney promptly.