A lawsuit is a formal civil dispute in which one party asks a court to resolve a disagreement with another party, usually by awarding money or ordering someone to do or stop doing something. So what is a lawsuit in practice? It is a sequence: one side files a complaint, the other side responds, both sides exchange evidence, and the case ends in a settlement, a trial verdict, or occasionally a default. Unlike a criminal case, where the government prosecutes someone for breaking the law, a civil lawsuit is brought by a private person or business seeking a remedy for a wrong. The timeline, cost, and complexity vary enormously depending on what the dispute is about and where it is filed.
Who the Parties Are
Every lawsuit has at least two sides. The plaintiff is the person or entity that files the case and carries the burden of proving the claims. The defendant is the party being sued. Either side can be an individual, a small business, a corporation, or a government agency. Multiple plaintiffs or defendants are common, and a defendant can turn around and file a counterclaim against the plaintiff within the same case.
Common Types of Civil Lawsuits
Most civil lawsuits fall into a handful of broad categories. Tort cases involve someone claiming they were harmed by another person’s carelessness or intentional conduct, such as personal injury from a car crash or medical malpractice. Breach of contract disputes arise when one side fails to hold up their end of a deal, whether that is a commercial lease, an employment agreement, or a construction contract. Property disputes involve land boundaries, ownership titles, or landlord-tenant conflicts. Family law cases cover divorce, child custody, and the division of assets.
What to Check Before You File
Before assuming you can file a traditional lawsuit, check whether you signed a contract with an arbitration clause. Many employment agreements, consumer contracts, and service agreements require you to resolve disputes through private arbitration instead of court. Under federal law, these clauses are generally enforceable as long as the underlying contract is valid.1Office of the Law Revision Counsel. 9 U.S.C. 2 – Validity, Irrevocability, and Enforcement of Agreements to Arbitrate If your contract includes one, you may be blocked from filing suit at all.
You also need to beat the deadline. Every type of lawsuit comes with a statute of limitations, and missing it will almost certainly get your case thrown out regardless of how strong your evidence is. Deadlines vary by claim type and jurisdiction. Personal injury claims, for example, carry deadlines ranging from one to six years depending on the state, with two years being the most common window. For federal claims where Congress did not set a specific deadline, the default is four years from the date the cause of action arises, though this applies only to statutes enacted after December 1, 1990.2Office of the Law Revision Counsel. 28 U.S.C. 1658 – Time Limitations on the Commencement of Civil Actions Older federal claims borrow the deadline from the most analogous state law.
One important exception is the discovery rule. Sometimes the harm is not immediately obvious. A surgeon leaves an instrument inside a patient, or a financial advisor hides fraudulent transactions. In those situations, many courts do not start the clock until the injured person knew or reasonably should have known about the harm. “Reasonably should have known” means the law expects you to investigate suspicious symptoms or circumstances, so ignoring red flags will not preserve your case.
Finally, you need a specific legal theory, called a cause of action, that entitles you to relief. “They wronged me” is not enough. You need something like “they breached our contract” or “their negligence caused my injury.” You also need the full legal names and addresses of every defendant. For businesses, that means the registered legal entity, not just the trade name on the storefront.
Choosing the Right Court
Filing in the wrong court wastes time and money. Two things have to be right: jurisdiction and venue. Jurisdiction is the court’s legal authority to hear your type of case. State courts handle most civil disputes. Federal courts step in when the case involves a federal law, when the parties are from different states and the amount at stake exceeds $75,000, or in a few other specific situations.3Office of the Law Revision Counsel. 28 U.S.C. 1332 – Diversity of Citizenship; Amount in Controversy
Venue determines which specific courthouse within that court system is proper. In federal court, you generally file where the defendant lives (if all defendants live in the same state) or where a substantial part of the events giving rise to the claim took place.4Office of the Law Revision Counsel. 28 U.S.C. 1391 – Venue Generally State courts follow similar but not identical rules. Filing in the wrong venue will not necessarily kill your case, but the defendant can ask to have it dismissed or transferred, which means delays and extra legal fees.
If your claim is for a relatively small amount of money, small claims court is often faster and cheaper. Most states cap small claims cases somewhere between $2,500 and $25,000, with a typical limit in the $5,000 to $10,000 range. Procedures are simplified, lawyers are often unnecessary, and cases can wrap up in weeks rather than months or years.
What a Lawsuit Costs
Filing a lawsuit is not free. The filing fee for a new civil case in federal district court is $350 under the statute, but an additional administrative fee set by the Judicial Conference brings the actual cost to $405.5Office of the Law Revision Counsel. 28 U.S.C. 1914 – District Court Filing and Miscellaneous Fees State court fees range from under $100 in some courts to several hundred dollars in others, depending on the type of case and the jurisdiction.
If you cannot afford the filing fee, federal courts allow you to request a waiver by filing an affidavit showing you are unable to pay. The court reviews your financial situation and, if satisfied, lets you proceed without prepayment.6Office of the Law Revision Counsel. 28 U.S.C. 1915 – Proceedings In Forma Pauperis Most state courts offer similar fee waiver programs.
Filing fees are just the beginning. You will also face attorney fees, process server fees (typically $45 to $75 for standard service), court reporter charges for depositions, and potentially expert witness fees. In the United States, each side generally pays its own attorney fees regardless of who wins. This principle, known as the American Rule, means winning a lawsuit does not automatically entitle you to recover what you spent on your lawyer.7Department of Justice. Civil Resource Manual 220 – Attorneys Fees Exceptions exist under specific federal statutes and in cases involving bad faith conduct, but they are the exception.
Many plaintiffs in personal injury and similar cases hire attorneys on a contingency fee basis, meaning the lawyer gets paid only if you win. Typical contingency fees range from one-third to 40 percent of whatever you recover. If you lose, you owe nothing for the attorney’s time, though you may still be responsible for out-of-pocket costs like filing fees and deposition expenses.
How a Lawsuit Moves Through Court
Once your complaint is ready, you submit it to the court clerk along with the filing fee or a fee waiver request. The clerk assigns a case number that tracks every filing in the case going forward. The complaint itself needs to lay out the facts of what happened and specify what you are asking for, whether that is a dollar amount, a court order, or both.
Serving the Defendant
Next comes service of process: formally delivering the lawsuit papers to the defendant. This step has strict rules because the court needs assurance that the defendant actually knows about the case. In federal court, anyone at least 18 years old and not a party to the lawsuit can serve the papers. Common methods include handing them directly to the defendant, leaving them with a competent adult at the defendant’s home, or delivering them to an authorized agent. State courts generally follow similar rules.
After service, proof of service must be filed with the court. Without it, the case stalls. If the defendant cannot be found through normal means, courts may allow alternative service methods such as publication in a newspaper, but you will need to show genuine efforts to locate the defendant first.
The Defendant’s Response
Once served, the defendant does not have unlimited time to respond. In federal court, the deadline is 21 days after service to file an answer or a motion challenging the complaint.8Legal Information Institute. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections If the defendant voluntarily waives formal service, the deadline extends to 60 days. State court deadlines vary but typically fall in the 20-to-30-day range.
If the defendant ignores the lawsuit entirely, the plaintiff can ask the court for a default judgment. The clerk first records the defendant’s failure to respond, and then the court can enter a judgment awarding the plaintiff what they asked for. When the claim is for a specific dollar amount, this can be relatively straightforward. For more complex cases, the court may hold a hearing to determine damages.
Discovery
If the defendant does respond, the case enters discovery, the phase where both sides exchange information and build their evidence. Federal rules require each side to voluntarily hand over basic information at the start: names of people with relevant knowledge, copies of supporting documents, and a calculation of claimed damages.9Legal Information Institute. Federal Rules of Civil Procedure Rule 26 – Duty to Disclose
After those initial disclosures, formal discovery tools come into play. Interrogatories are written questions that must be answered under oath, typically within 30 days.10Legal Information Institute. Federal Rules of Civil Procedure Rule 33 – Interrogatories to Parties Document requests compel the other side to turn over relevant records like medical files, contracts, or internal emails. Depositions put witnesses under oath in front of a court reporter to answer questions in person. Discovery is often where one side realizes their position is weaker than they thought.
Summary Judgment
After discovery wraps up, either side can file a motion for summary judgment, asking the judge to decide the case without a trial. If there is no genuine dispute about the material facts and the law clearly favors one side, the judge can end the case right there.11Legal Information Institute. Federal Rules of Civil Procedure Rule 56 – Summary Judgment A lot of cases effectively get decided at this stage, because even when the motion is denied, the judge’s reasoning signals how they view the evidence.
How Lawsuits End
The vast majority of civil lawsuits never reach a courtroom. Most end in a settlement, a private agreement where the defendant pays an amount both sides can live with in exchange for the plaintiff dropping the case. Settlement can happen at any point, from before the lawsuit is filed all the way through trial.
Courts often push the parties toward mediation before trial. A mediator is a neutral third party who facilitates negotiation but has no power to impose a decision. The mediator’s job is to help each side understand the other’s position and find common ground. Mediation works best when both sides have realistic expectations about their chances at trial.
If settlement and mediation fail, the case goes to trial. Depending on the case and the parties’ preferences, a jury or a judge alone hears the evidence, listens to arguments, and delivers a verdict. The losing side is then bound by the judgment unless they successfully appeal.
Appeals
Losing at trial does not always mean the fight is over. The losing party can appeal to a higher court, but appeals are not do-overs. An appellate court reviews the trial court’s record for legal errors, such as improperly admitted evidence, incorrect jury instructions, or a misapplication of the law. The appellate court does not hear new witnesses or consider new evidence.12United States Courts. Appeals
The appellant files a written brief arguing that the trial court made a significant legal mistake. The other side responds by arguing that the trial court got it right, or that any errors were harmless. The appellate court can affirm, reverse, or send the case back with instructions. Appeals add months or years to a case’s timeline and significant expense.
Collecting What You Win
Winning a judgment and actually getting paid are two very different things. A court judgment is a legal declaration that the defendant owes you money, but it does not come with a check attached. If the defendant does not pay voluntarily, you will need enforcement tools.
The most common methods include wage garnishment, where a portion of the defendant’s paycheck is redirected to you, and bank levies, where funds are seized directly from the defendant’s bank account. Federal law caps wage garnishment for most consumer debts at 25 percent of the debtor’s disposable earnings or the amount by which weekly earnings exceed 30 times the federal minimum wage, whichever is less.13Office of the Law Revision Counsel. 15 U.S.C. 1673 – Restriction on Garnishment You can also place a lien on the defendant’s real property, which does not produce immediate cash but ensures you will be paid when the property is sold. Judgment liens typically last 10 years in most states and can often be renewed.
Collection catches many winning plaintiffs off guard. If the defendant has no assets, no income, or files for bankruptcy, even a perfectly valid judgment can be difficult or impossible to collect. Before suing, ask whether the defendant can actually pay what you are seeking. A judgment against someone with nothing to lose is just an expensive piece of paper.