A federal civil lawsuit is a case in which a plaintiff asks a court for relief from another party; a federal criminal case is a prosecution by the United States alleging a violation of federal criminal law. The biggest practical differences are who brings the case, what must be proved, and what the court can order. Not every civil dispute belongs in federal court: federal jurisdiction is limited by law and the Constitution.
How federal civil and criminal cases differ
| Question | Federal civil lawsuit | Federal criminal case |
|---|---|---|
| Who brings it? | A plaintiff—often a person, business, or other party—with a legal claim. | The United States, usually represented by a U.S. attorney. |
| What is it for? | To resolve a legal dispute and obtain relief for an alleged wrong. | To decide whether the defendant committed the charged federal crime and, if convicted, impose a sentence. |
| How does it begin? | The plaintiff files a complaint and serves it on the defendant. | The government initiates a prosecution; prosecutors and, in many cases, a grand jury are key early actors. |
| Who must prove what? | The plaintiff generally must prove the claim by a preponderance of the evidence: more likely than not. | The government must prove guilt beyond a reasonable doubt. The defendant does not have to prove innocence. |
| What can follow? | Damages, an injunction, a declaration of rights, or other relief. | An acquittal or conviction; a conviction can lead to imprisonment, a fine, restitution, or supervision conditions. |
| Which procedural rules apply? | The Federal Rules of Civil Procedure. | The Federal Rules of Criminal Procedure. |
The U.S. Courts describe a civil case as a legal dispute between two or more parties. A criminal case is different because only the government initiates it, typically through the U.S. attorney’s office working with a law enforcement agency. A person who believes a crime occurred may report it, but does not personally file federal criminal charges in district court. U.S. Courts: Civil Cases; U.S. Courts: Criminal Cases; U.S. Courts: FAQs: Filing a Case.
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What happens in a federal civil lawsuit?
The plaintiff files a complaint
A civil action starts when the plaintiff files a complaint and serves it on the defendant. The complaint explains the alleged injury or damages, how the defendant allegedly caused the harm, why the court has jurisdiction, and what relief the plaintiff wants. Federal courts have limited jurisdiction, so a dispute is not federal merely because one side chooses to file there. U.S. Courts: Civil Cases; U.S. Courts: About U.S. District Courts.
The parties develop and present their claims
Civil cases may include discovery, a process in which parties exchange information relevant to the case. If the dispute proceeds to trial, it may be decided by a jury or by a judge without a jury. The plaintiff generally must persuade the fact-finder that the claim is more likely than not to be true. That standard is not a fixed percentage; it is a plain-language description of the burden.
The court can order relief
Depending on the claim and applicable law, a court may award money damages, order a party to stop or take an action, declare the parties’ legal rights, or grant another form of relief. A civil result is not itself a criminal conviction or sentence.
What happens in a federal criminal case?
The government decides whether to prosecute
Law enforcement may investigate suspected federal crimes, and prosecutors decide whether to bring charges. A grand jury may review evidence presented by the U.S. attorney and determine whether there is sufficient basis to require the defendant to stand trial. The government—not the alleged victim—brings the prosecution. U.S. Courts: Criminal Cases.
The defendant enters a plea
At arraignment, the defendant is informed of the charges and enters a plea. A guilty plea can lead to sentencing; a not-guilty plea moves the case toward trial. The government retains the burden of proving guilt beyond a reasonable doubt, and the defendant is not required to establish innocence.
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Criminal discovery is more limited
Criminal cases have discovery procedures, but they are more limited than civil discovery. Restrictions can protect matters such as informants and witnesses. The governing procedures are set out in the Federal Rules of Criminal Procedure, alongside applicable statutes and court orders. Federal Rules of Criminal Procedure.
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A conviction can result in a sentence
If the defendant is acquitted, there is no criminal sentence for that charge. A conviction can result in imprisonment, a fine, restitution to victims, or conditions of supervision, depending on the offense and the case.
How proof and juries compare
The different burdens of proof reflect the different stakes and purposes of the proceedings. In a civil case, the plaintiff generally must show that the claim is more likely than not. In a criminal trial, the prosecution must prove guilt beyond a reasonable doubt. Neither standard is expressed as a precise numerical percentage in the cited U.S. Courts explanations.
Both kinds of federal case may be decided by a petit jury. A civil case may instead be tried to a judge. In either setting, the fact-finder applies the relevant law under the judge’s instructions; the type of case determines the burden that applies. Federal petit juries comprise 6–12 people, according to the U.S. Courts. U.S. Courts: Types of Juries.
Can the same conduct lead to both kinds of case?
Potentially, yes. The same conduct may give rise to a separate civil lawsuit and a criminal prosecution, because the proceedings serve different purposes and use different procedures. That does not mean both cases will always be filed: whether either proceeds depends on the facts and applicable law. A civil case seeks relief for a legal wrong; a criminal case asks whether the government can prove a federal crime.
Which rules govern federal cases?
Federal civil proceedings in U.S. district courts are governed by the Federal Rules of Civil Procedure, while federal criminal proceedings and prosecutions are governed by the Federal Rules of Criminal Procedure. The U.S. Courts’ current-rules pages report that the Civil Rules were last amended in 2025 and the Criminal Rules in 2023. Because rules and case-specific procedures can change, consult the current rules for an active matter. Federal Rules of Civil Procedure; Federal Rules of Criminal Procedure.
This is general legal information, not a determination of federal jurisdiction or advice about a particular case. Federal and state court processes differ, and a qualified attorney can assess which court and procedures apply to a specific situation.
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