Federal pleading under Rule 8: three requirements, eighteen affirmative defenses, and the denial that admits

Rule 8 is three pages long and governs both sides of every federal pleading. Most attention goes to subdivision (a) and the plausibility standard the Supreme Court built on it. The provisions that decide more cases, quietly, are in subdivisions (b) and (c): the rules about how you deny, and the eighteen defenses that are lost if you do not plead them.

What a complaint must contain

Rule 8(a): a pleading that states a claim for relief must contain:

(1) a short and plain statement of the grounds for the court's jurisdiction, unless the court already has jurisdiction and the claim needs no new jurisdictional support; (2) a short and plain statement of the claim showing that the pleader is entitled to relief; and (3) a demand for the relief sought, which may include relief in the alternative or different types of relief.

Three items, and the first is the one most often omitted in a complaint drafted from a state-court template. Federal courts are courts of limited jurisdiction, and Rule 12(h)(3) requires dismissal at any time if subject-matter jurisdiction is lacking. The jurisdictional statement is not boilerplate.

"Showing that the pleader is entitled to relief" in paragraph (2) is the language the plausibility standard is built on. The rule itself sets no detail requirement beyond "short and plain"; what a complaint must contain to survive a Rule 12(b)(6) motion comes from case law. The guide on the federal motion to dismiss covers that motion's mechanics.

Answering: how you deny matters

Rule 8(b)(1): in responding to a pleading, a party must

(A) state in short and plain terms its defenses to each claim asserted against it; and (B) admit or deny the allegations asserted against it by an opposing party.

Rule 8(b)(2): "A denial must fairly respond to the substance of the allegation."

Rule 8(b)(3) — general and specific denials:

A party that intends in good faith to deny all the allegations of a pleading — including the jurisdictional grounds — may do so by a general denial. A party that does not intend to deny all the allegations must either specifically deny designated allegations or generally deny all except those specifically admitted.

A general denial is permitted, but only where the party genuinely intends to deny everything, jurisdiction included. In most cases that is not true, which makes the general denial a Rule 11 problem as much as a Rule 8 one.

Rule 8(b)(4) — partial denials: a party denying only part of an allegation "must admit the part that is true and deny the rest."

Rule 8(b)(5) — lack of knowledge: a party that lacks knowledge or information sufficient to form a belief about the truth of an allegation "must so state, and the statement has the effect of a denial."

That is the safe answer where you genuinely do not know — and note that it operates as a denial, so nothing is conceded by using it.

The provision that admits by silence

Rule 8(b)(6):

An allegation — other than one relating to the amount of damages — is admitted if a responsive pleading is required and the allegation is not denied. If a responsive pleading is not required, an allegation is considered denied or avoided.

Every paragraph you skip is admitted. There is no requirement that the omission be deliberate, and no relief built into the rule.

The damages carve-out is the single exception: failing to deny the amount of damages does not admit it.

And where no response is required, the default flips — allegations are treated as denied. That is why no reply to an answer is needed unless the court orders one under Rule 7(a).

The eighteen affirmative defenses

Rule 8(c)(1): in responding to a pleading, a party "must affirmatively state any avoidance or affirmative defense, including":

accord and satisfaction · arbitration and award · assumption of risk · contributory negligence · duress · estoppel · failure of consideration · fraud · illegality · injury by fellow servant · laches · license · payment · release · res judicata · statute of frauds · statute of limitations · waiver

Two things about that list.

It is illustrative, not exhaustive — the rule says "including," and the operative words are "any avoidance or affirmative defense." A defense that functions as an avoidance must be pleaded whether or not it appears here.

And several are easy to overlook at the answer stage because they depend on facts that emerge later — release, payment, accord and satisfaction, arbitration and award. The safe course is to plead what the facts might support and drop what proves groundless, subject to Rule 11.

Rule 8(c)(2) — mistaken designation: if a party mistakenly designates a defense as a counterclaim, or a counterclaim as a defense, "the court must, if justice requires, treat the pleading as though it were correctly designated, and may impose terms for doing so."

A rare provision that fixes a labeling error rather than punishing it.

Alternative and inconsistent pleading

Rule 8(d)(1): "Each allegation must be simple, concise, and direct. No technical form is required."

Rule 8(d)(2): a party may set out two or more statements of a claim or defense "alternatively or hypothetically, either in a single count or defense or in separate ones," and — importantly —

If a party makes alternative statements, the pleading is sufficient if any one of them is sufficient.

Rule 8(d)(3): "A party may state as many separate claims or defenses as it has, regardless of consistency."

So a complaint may plead breach of contract and, in the alternative, unjust enrichment on the footing that no contract existed. Inconsistency between alternatives is not a defect, and a motion attacking one alternative does not dispose of the count if another is sufficient.

Rule 8(e): "Pleadings must be construed so as to do justice."

Rule 9: where more detail is required

Rule 9 is the exception list to Rule 8's "short and plain" default.

Fraud and mistake — Rule 9(b):

In alleging fraud or mistake, a party must state with particularity the circumstances constituting fraud or mistake. Malice, intent, knowledge, and other conditions of a person's mind may be alleged generally.

Two halves that pull in opposite directions, and both matter. The circumstances — who, what, when, where, how — need particularity. The state of mind does not. A complaint that pleads the transaction in detail and alleges scienter generally is doing what the rule asks.

Special damages — Rule 9(g): "If an item of special damage is claimed, it must be specifically stated."

Easy to miss, and the consequence is the loss of a category of damages rather than the claim.

Conditions precedent — Rule 9(c): it suffices to allege generally that all conditions precedent have occurred or been performed. "But when denying that a condition precedent has occurred or been performed, a party must do so with particularity."

The burden of particularity is on the denying party here — the reverse of the usual pattern, and a trap in insurance and contract answers.

Capacity — Rule 9(a): except where needed to show jurisdiction, a pleading need not allege a party's capacity to sue or be sued, authority to sue in a representative capacity, or the legal existence of an organized association. To raise any of those issues, "a party must do so by a specific denial, which must state any supporting facts that are peculiarly within the party's knowledge."

Official documents and judgments — Rules 9(d) and 9(e): it suffices to allege that a document was legally issued or an act legally done, and to plead a judgment or decision "without showing jurisdiction to render it."

Time and place — Rule 9(f): "An allegation of time or place is material when testing the sufficiency of a pleading."

Admiralty — Rule 9(h): a claim within admiralty or maritime jurisdiction and some other basis of subject-matter jurisdiction may be designated as an admiralty or maritime claim for purposes of Rules 14(c), 38(e) and 82 and the Supplemental Rules. A claim cognizable only in admiralty is one "whether or not so designated." A case including such a claim is an admiralty case within 28 U.S.C. § 1292(a)(3).

The designation matters: it determines whether there is a jury right under Rule 38(e) and whether Rule 14(c) third-party practice is available.

What Rule 8 and Rule 9 require, side by side

A short checklist

Drafting a complaint

1. Plead the jurisdictional grounds as their own short and plain statement.
2. Use Rule 8(d)(2) alternatives where the facts admit of more than one theory — inconsistency is expressly permitted, and one sufficient alternative carries the count.
3. Plead fraud circumstances with particularity, and state of mind generally. Rule 9(b) allows the second.
4. Itemize special damages. Rule 9(g) requires it, and general damages language will not carry them.
5. Do not plead capacity unless it goes to jurisdiction. Rule 9(a) makes it unnecessary.

Drafting an answer

1. Respond to every paragraph. Rule 8(b)(6) admits anything you do not deny, except the amount of damages.
2. Make each denial fairly respond to the substance of the allegation.
3. Admit the true part of a partly-true allegation and deny the rest.
4. Use the lack-of-knowledge response where it is genuinely true — it operates as a denial.
5. Do not file a general denial unless you truly deny everything, jurisdiction included.
6. Work the Rule 8(c) list before you file, and remember it is illustrative rather than exhaustive.
7. If you deny a condition precedent, do it with particularity. Rule 9(c) puts that burden on you.

Where these rules live

• FRCP 7 — Pleadings allowed; form of motions
• FRCP 8 — General rules of pleading
• FRCP 9 — Pleading special matters
• FRCP 10 — Form of pleadings
• FRCP 11 — Signing pleadings; representations to the court; sanctions
• FRCP 12 — Defenses and objections
• FRCP 15 — Amended and supplemental pleadings
• FRCP 38 — Right to a jury trial; demand

This page explains what the rules say. It isn't legal advice, and the plausibility standard courts apply to Rule 8(a)(2) comes from case law this site doesn't cover.