To file a lawsuit, you need a legal claim that is still within its deadline, standing to bring it, a specific cause of action, a written complaint filed in a court that has authority over the dispute, the filing fee (or an approved waiver), and formal delivery of the paperwork to the person or business you are suing. That is the short list of what you need to file a lawsuit, and missing any one of those pieces will stop your case before a judge ever looks at it.
Confirm the Filing Deadline Before Anything Else
Every civil claim has a statute of limitations. Once it runs out, the other side can ask the court to dismiss your case and the court will almost always agree, no matter how strong your evidence is. Check this first, because the rest of your preparation is wasted if the window has already closed.
The clock usually starts on the date you were injured or the date a contract was broken. Personal injury claims commonly have a two-year deadline, though some states allow as little as one year and others as many as six. Breach of contract claims typically run four to six years. Defamation is often just one year from publication. Claims against a government agency can be much tighter, sometimes requiring a formal notice within 60 to 180 days before any lawsuit is even possible.
Make Sure You Have Standing
Standing is the court’s threshold test for whether you are the right person to bring a case. It has three parts: you suffered a real, concrete injury rather than a hypothetical one; the injury is traceable to something the other party did or failed to do; and a ruling in your favor can actually fix or compensate the harm.1Legal Information Institute. Standing Requirement Overview
Standing trips people up more often than you might expect. If a company’s conduct harmed the environment in your area but you personally suffered no measurable injury, you likely lack standing. If a business broke a contract with your friend but not with you, you cannot sue on your friend’s behalf. The injury has to be yours.
Identify Your Cause of Action
A cause of action is the legal theory that entitles you to a remedy. It is a defined set of facts that, if proven, gives you the right to win. Breach of contract, negligence, and personal injury are common examples, and each has its own required elements.2Legal Information Institute. Cause of Action
A breach of contract claim requires proof that a valid contract existed, the other side broke it, and you suffered losses as a result. A negligence claim requires proof the other party owed you a duty of care, failed to meet it, and that failure caused your harm. Picking the wrong theory can get your complaint dismissed even when the underlying facts are on your side. You also need to decide what you are asking for: money damages, an order forcing the other side to do or stop doing something, or both.
Gather Your Evidence Before You File
Start collecting evidence before you file, not after. Contracts, invoices, medical records, financial statements, emails, text messages, voicemails, and photographs can all serve as proof. If witnesses saw what happened, write down their names and contact information while memories are fresh.
Laying everything out early tells you whether your case is strong enough to pursue and gives you (or your attorney) the raw material to draft a detailed complaint. Gaps become obvious once you organize what you have, and finding them before filing is far better than finding them after opposing counsel does.
Handle Any Required Pre-Suit Steps
Certain disputes require specific steps before you can go to court. Skip them and the other side can have your case thrown out immediately.
Demand Letters
A demand letter puts the other party on notice that you plan to sue unless the dispute is resolved. It is not always legally required, but it is standard practice, and courts tend to look favorably on plaintiffs who tried to resolve things first. A useful demand letter spells out what happened, what you want, and a deadline for a response.
Claims Against the Government
If your dispute is with a federal agency, the Federal Tort Claims Act requires you to file an administrative claim with that agency before suing. You have two years from when the claim arises, and you must state a specific dollar amount for your damages.3U.S. Department of Justice. Civil Division Documents and Forms State and local government claims have their own notice requirements, often with much shorter deadlines. Missing these pre-suit windows is one of the most common ways people forfeit otherwise valid claims against government entities.
Mediation or Arbitration Clauses
Some contracts require mediation or arbitration before either party can sue. Some courts also require mediation for particular case types. Check your contracts and local court rules before drafting a complaint.
Draft the Complaint and Get a Summons
The complaint is the document that officially launches your case. Under the federal rules, it must contain three things: a statement showing why that court has authority over the dispute, a plain statement of your claim showing you are entitled to relief, and a description of what you want the court to award.4Office of the Law Revision Counsel. Federal Rules of Civil Procedure Rule 8 – General Rules of Pleading State courts follow similar structures with their own formatting rules.
The complaint does not need to prove your case. It needs to tell a clear enough story that the court can see a plausible claim. Name every plaintiff and defendant, lay out the facts in order, identify the legal theories that support your claim, and end with the specific relief you want. Courts are particular about margins, font sizes, caption style, and page limits, and these differ by jurisdiction.
Along with the complaint, the clerk will issue a summons. That is the formal notice telling the defendant a lawsuit has been filed and setting the deadline to respond, typically 21 days in federal court or 60 days if the defendant waives formal service.5Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons
File With the Court and Pay the Fee
A civil action begins when you file the complaint with the court clerk. Most courts allow filing in person, by mail, or through an electronic filing system, and many now require e-filing.
Filing costs money. Federal civil filing fees generally fall in the $350 to $405 range.6United States Courts. U.S. Court of Federal Claims Fee Schedule State court fees vary widely by case type and court, from under $100 for small claims to over $400 for general civil cases. Bring multiple copies: one for the court’s file, one for your records, and one for each defendant.
Fee Waivers
If you cannot afford the filing fee, federal courts let you apply to proceed without paying by filing an affidavit showing you are unable to pay. The court reviews your finances and decides whether to waive the fee.7Office of the Law Revision Counsel. U.S. Code Title 28 Section 1915 – Proceedings In Forma Pauperis Most state courts offer similar programs with their own forms and eligibility standards. Do not let the fee alone stop you from pursuing a valid claim without at least asking.
Serve the Defendant
Filing gets your case into the system. Serving the defendant is what gives the court authority over them. Both are required. The defendant must receive a copy of the summons and complaint through an approved delivery method, known as service of process.8Legal Information Institute. Service of Process
Personal service is the most common method: a sheriff’s deputy or a professional process server hand-delivers the documents to the defendant. You cannot serve the documents yourself. In federal court, you have 90 days from filing to complete service, and missing that window without good cause can get your case dismissed.5Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons A process server typically costs anywhere from $20 to several hundred dollars depending on your location and how hard the defendant is to find.
Federal rules also let you ask the defendant to waive formal service. You mail the complaint with a waiver form, and the defendant has at least 30 days to sign and return it. The trade is more time to respond, 60 days instead of 21. If a defendant in the United States refuses without good reason, the court can order them to pay the costs of formal service.5Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons
After the defendant is served, you must file proof with the court: usually a short form signed by whoever delivered the documents, stating when, where, and how. A returned waiver takes the place of that proof.5Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons
Plan for the Full Cost of the Case
The filing fee is just the entry ticket. Attorney fees are usually the largest expense. Lawyers handling civil litigation generally charge either an hourly rate, commonly $350 to $700 per hour for experienced litigators, or a contingency percentage, usually 30 to 40 percent of what you recover, with nothing upfront if you lose. Contingency is most common in personal injury cases.
Out-of-pocket costs add up on top of that. Expert witnesses average roughly $350 to $480 per hour depending on whether they are reviewing files, sitting for a deposition, or testifying. Deposition transcripts, court reporter fees, copying, and travel all land on your tab too.
In the United States, the general rule is that each side pays its own attorney’s fees, win or lose. The exceptions are when a contract says otherwise, when a statute allows fee-shifting, or when a court finds that the losing party acted in bad faith. If your contract has an attorney’s fees clause, read it carefully, because it may run both ways.
When Small Claims Court Is the Better Fit
If your dispute involves a modest dollar amount, small claims court is often faster and far cheaper. These courts use simplified procedures, lower filing fees, and no attorney requirement. Maximum claim amounts vary by state, with most falling between $2,500 and $25,000. If your claim fits, small claims can get you in front of a judge in weeks rather than months or years.
Do Not File Without a Legitimate Basis
Courts take frivolous filings seriously. Under federal rules, anyone who signs a complaint certifies that they have conducted a reasonable investigation, that the claims are supported by existing law, and that the factual allegations have evidentiary support. Filing to harass someone, run up their costs, or press claims you know lack legal basis can lead to sanctions, including orders to pay the other side’s attorney’s fees, monetary penalties, or non-monetary directives.9Legal Information Institute. Federal Rules of Civil Procedure Rule 11 – Signing Pleadings, Motions, and Other Papers; Representations to the Court; Sanctions If you are unsure whether your claim has a legitimate basis, a consultation with an attorney costs less than defending a sanctions motion.