What is an answer?

An answer is the defendant's formal written response to a complaint. After being served with a lawsuit, the defendant either files an answer, files a [motion](/insights/glossary/motion) to dismiss, or risks losing by default.

This lesson explains what's in an answer, the rules for how to write one, and what happens after it's filed.

What an answer does

Three main things:

Responds to each allegation in the complaint: admit, deny, or say you don't know
Raises affirmative defenses: reasons the plaintiff loses even if their facts are true
Possibly includes counterclaims: claims you have against the plaintiff

Filing an answer locks in the disputed factual issues, surfaces the defendant's defenses, and starts the substantive litigation phase of the case.

Responding to each allegation

The complaint contains numbered factual allegations. The answer responds to each one: typically in numbered paragraphs that match the complaint's numbering.

For each allegation, the defendant has three options:

Admit. "Defendant admits the allegations of paragraph 5." Use this when the fact is true and not contested.
Deny. "Defendant denies the allegations of paragraph 6." Use when the fact is false, partially false, or you want to put the plaintiff to their proof.
Insufficient knowledge. "Defendant lacks knowledge or information sufficient to form a belief about the truth of paragraph 7, and on that basis denies." Use when you really don't know.

Failing to specifically deny an allegation is sometimes treated as an admission. Be careful about omissions.

Why denials matter

Once an allegation is admitted, it's locked in. The plaintiff doesn't have to prove it. Once an allegation is denied, the plaintiff has to prove it with evidence.

So denying things you don't have to admit is usually the right move: it forces the plaintiff to prove their case.

But you can't deny things that are obviously true. Federal Rule of Civil Procedure 11 requires that all denials have a good-faith basis. Frivolous denials can lead to sanctions.

Affirmative defenses

After responding to each allegation, the answer lists affirmative defenses: reasons the defendant should win even if the plaintiff's allegations are all true.

Common affirmative defenses:

Statute of limitations: the plaintiff waited too long to sue
Statute of frauds: the contract had to be in writing and wasn't
Consent: the plaintiff agreed to whatever they're now complaining about
Self-defense (in tort cases involving force)
Unclean hands: the plaintiff was acting wrongfully themselves
Failure to mitigate damages: the plaintiff didn't take reasonable steps to limit their harm
Comparative negligence: the plaintiff was partly at fault for their own injuries
Release: the plaintiff already released the claim
Accord and satisfaction: the dispute was already resolved
Res judicata or collateral estoppel: the issue was already decided in another case

The defendant has the burden of proving affirmative defenses, even when the plaintiff has the overall burden in the case.

Why list every defense

Most affirmative defenses must be raised in the answer or they're waived. If you don't list "[statute](/insights/glossary/statute) of limitations" as an affirmative defense, you usually can't argue later that the case is time-barred.

The standard practice is to list every defense that has any plausible basis, even if you're not sure you'll pursue it. Better to list it and drop it later than to omit it and lose the right to raise it.

Counterclaims

If the defendant has their own claims against the plaintiff, the answer can include them as counterclaims. The defendant becomes essentially a plaintiff for purposes of the counterclaim: they have to plead facts, identify legal theories, and ask for relief just like the original complaint.

Counterclaims come in two flavors:

Compulsory counterclaims must be raised in the same case if they arise from the same situation as the plaintiff's claims. If you don't raise them, you can't sue separately later.
Permissive counterclaims can be raised in the same case or a separate one: your choice.

Counterclaims expand the scope of the case but can be tactically valuable. They put the plaintiff on the defensive and can shift the bargaining dynamics.

When the answer is due

The deadline depends on the court:

Federal court (most cases): 21 days from service
State courts: typically 20-30 days, varying by state
Small claims: often shorter
Eviction cases: often very short (5-7 days in some states)

Filing a motion to dismiss instead of an answer postpones the answer deadline. If the motion is denied, the defendant typically has 14 days from the denial to file the answer.

Missing the deadline

If the answer isn't filed by the deadline, the plaintiff can ask for a default. Once defaulted, the defendant has effectively given up: the plaintiff can ask for a default [judgment](/insights/glossary/judgment) without further input.

Defaults can sometimes be set aside if the defendant moves quickly and shows good cause (proper notice wasn't given, illness, etc.). But the longer the delay, the harder the set-aside.

Pro se answers

If you've been served with a lawsuit and don't have a lawyer:

Get the deadline right

Read the summons. It tells you exactly how long you have. Calendar it prominently: phone, paper, multiple places.

Use the court's form

Many courts have answer forms: fill-in-the-blank documents that walk you through admitting/denying each allegation. Use them. They prevent missing required parts.

Don't admit things you don't have to

Default to denial unless something is clearly true. Forcing the plaintiff to prove their case is a basic litigation strategy.

List defenses generously

Include every affirmative defense that has any plausible basis. Drop ones you don't pursue later. Don't omit and lose them.

Watch for counterclaims

If you have your own claims against the plaintiff, raise them in the answer (especially if they're compulsory counterclaims).

Sign and serve properly

Most courts require the answer to be served on the plaintiff (or their lawyer) by mail or other approved method. Filing alone isn't enough: you have to serve.

Keep copies

You should have a copy of every document you file, with proof of service.

What happens after the answer

Once the answer is filed:

The pleadings are settled. The case has a defined dispute.
Discovery begins. Both sides start exchanging information.
The court schedules. A scheduling order sets deadlines for discovery, motions, expert designation, and trial.
Motions can be filed. Either side can file motions during discovery: to compel, to amend, etc.

The answer is one of the most important documents in the case from the defendant's perspective. It frames the dispute. A weak answer concedes too much; a strong answer forces the plaintiff to prove their case point by point.

This lesson is research and educational information, not legal advice. Drafting an answer properly requires understanding both procedural rules and the substantive defenses available in your case. Consult an attorney for help with specific situations.