How to File a Lawsuit (or Sue a Company)

Filing a lawsuit is a step-by-step legal process. This guide explains how to figure out your claim type, check your deadline, choose the right court, and decide whether you need a lawyer — before you file a single form.

Step 1: Understand Your Claim

Every lawsuit starts with a legal theory — the specific reason the law entitles you to money or other relief. Before you file anything, you need to identify what type of claim you have. Common civil claim types include personal injury, breach of contract, employment discrimination, fraud, product liability, and consumer protection violations.

The claim type matters because it determines which court has authority, what evidence you need, and what damages you can recover. A breach of contract case requires different proof than a personal injury case, even if both involve the same company.

If you were harmed by a defective product used by many people, your situation may already be part of a larger legal action. Class actions group thousands of similar plaintiffs into one case, while mass torts let individuals pursue separate cases tied to the same defendant and product. Know your legal rights before deciding which path to take.

Step 2: Check the Statute of Limitations

A statute of limitations is a legal deadline — miss it, and you permanently lose the right to sue, no matter how strong your case is. Every claim type has its own deadline, and every state sets its own rules.

For personal injury claims, most states allow two to three years from the date of injury. Breach of contract claims typically run three to six years. Federal civil rights claims under 42 U.S.C. § 1983 usually follow the state's personal injury deadline. Fraud claims may not start running until you discovered — or reasonably should have discovered — the fraud.

One non-obvious detail: in some states, the clock can be "tolled" (paused) if the defendant actively concealed the harm or if the plaintiff was a minor at the time. Always verify your specific deadline before assuming it has passed.

Step 3: Choose the Right Court

Your claim type and the dollar amount at stake determine which court can hear your case. Filing in the wrong court wastes time and money — the case gets dismissed and you start over.

There are three main options for most civil claims: small claims court (for low-dollar disputes), state civil court (for most individual lawsuits), and federal court (for federal law violations or cases involving parties from different states with more than $75,000 at stake). Employment discrimination claims under federal law typically require filing a charge with the EEOC before you can go to federal court.

Check uscourts.gov for a plain-language overview of how federal courts work and whether your case belongs there. For state court procedures, visit your state judiciary's official website.

Small Claims Court: When It Makes Sense

Small claims court is the fastest, cheapest way to sue for a limited dollar amount — and most people can handle it without a lawyer. Dollar limits vary by state, ranging from $2,500 in some states to $25,000 in others. The average is around $10,000.

Pros of Small Claims Court

Filing fees are low — usually $30 to $100. Cases are often resolved within 30 to 70 days. The rules of evidence are relaxed compared to civil court, so you can present your case in plain language.

What Small Claims Court Cannot Do

Small claims court cannot handle injunctions (court orders to stop behavior), class actions, or cases above the dollar limit. If you need the defendant to stop doing something — not just pay you — you need civil court.

Common small claims disputes include unpaid rent, contractor disputes, damage deposits, and small consumer fraud cases. If your claim exceeds the limit, you can choose to waive the excess and sue for the cap — some plaintiffs do this to avoid the expense of civil court.

How the Civil Lawsuit Process Works

A civil lawsuit follows a predictable sequence of stages, from complaint to trial — though most cases settle before reaching a courtroom. Knowing the stages helps you plan your time and resources.

The Six Main Stages

1. Complaint: You file a written document stating your claims and the relief you seek.
2. Service of Process: The defendant is formally notified of the lawsuit.
3. Answer: The defendant responds, admitting or denying each allegation.
4. Discovery: Both sides exchange evidence — documents, depositions, interrogatories.
5. Pre-Trial Motions: Either side may ask the court to resolve issues before trial.
6. Trial or Settlement: Most cases settle during or after discovery.

Discovery is often the most expensive phase. In complex commercial cases, document review alone can cost tens of thousands of dollars. This is one reason settlement is so common — roughly 95% of civil cases settle before trial, according to data from the federal court system.

Class Actions and Mass Torts

Joining a group lawsuit — a class action or mass tort — can dramatically lower your costs and increase your leverage when a company harmed thousands of people the same way it harmed you. If a company's wrongdoing affected large numbers of people identically, that same pattern of conduct is what makes group litigation so powerful: you share legal costs with thousands of co-plaintiffs, and the total exposure forces defendants to take settlement seriously.

Class actions treat all plaintiffs as a single group. One settlement covers everyone. Individual payouts are often small — sometimes just a few dollars — but the legal pressure on the defendant is enormous. Mass torts are different: each plaintiff keeps their own case, so damages reflect their specific injuries. Mass torts are common in pharmaceutical and medical device litigation.

If you think your situation overlaps with an active group case, check open settlements to see whether a class action is already underway. Joining an existing case is often faster than filing alone. Use the eligibility check tool to see if you qualify.

Do You Need a Lawyer?

Most people filing a personal injury or employment claim need a lawyer — and most plaintiff-side attorneys charge nothing upfront. The complexity of your claim, the amount at stake, and whether the defendant has legal representation all affect how much you need professional help, but for high-stakes cases those factors almost always point in the same direction: get representation.

Contingency fee arrangements mean the attorney only gets paid if you win. Standard contingency fees run 33% of the recovery before trial and up to 40% if the case goes to appeal. For a $100,000 settlement, that is $33,000 to the attorney — still leaving you with $67,000 you would not have recovered alone.

Self-representation (called "pro se") is most practical in small claims court or for simple contract disputes under a few thousand dollars. In federal court, pro se plaintiffs face a significant disadvantage: they must follow the same procedural rules as licensed attorneys, and defendants are almost always represented by experienced defense counsel.

Gather Your Evidence First

Strong evidence collected before you file gives you a massive advantage at every stage of the civil lawsuit process. Once litigation starts, evidence can disappear — emails get deleted, witnesses forget details, and companies retain records on their own schedules.

What to Collect

• Contracts, receipts, invoices, and written agreements
• Photos, videos, and medical records documenting the harm
• Text messages, emails, or social media posts from the defendant
• Witness names and contact information
• A written timeline of events in your own words, created as soon as possible

Evidence Preservation Letters

If you suspect a company may delete records relevant to your claim, your attorney can send a "litigation hold" or evidence preservation letter. This letter formally puts the defendant on notice. Destroying evidence after receiving this letter can constitute spoliation — which courts can sanction severely.

How to File Your Complaint

Filing your complaint is the official act that starts the lawsuit — it triggers the court's involvement and begins the statute of limitations clock on the defendant's response time. The complaint must include your name and the defendant's name, a statement of facts, the specific legal claims, and the relief (money or action) you are requesting.

In federal court, complaints must comply with Federal Rule of Civil Procedure 8, which requires a "short and plain statement" of the claim. In state court, rules vary. Many courts now accept e-filing, which speeds up the process significantly.

After filing, you must serve the defendant — deliver the complaint through an approved legal method. Service rules differ by state and by whether the defendant is an individual, a corporation, or a government entity. Improper service is a common reason cases get dismissed early.

What Happens After You File

After you file a lawsuit and serve the defendant, the case enters a structured waiting period where both sides build their evidence and the court manages deadlines. The defendant typically has 20 to 30 days to file an answer in federal court; state deadlines vary.

If the defendant fails to respond, you can request a default judgment — the court rules in your favor automatically. This happens more often in small claims cases and consumer debt cases than in complex litigation. In high-stakes cases, defendants almost always respond.

Discovery begins after both sides have filed their initial documents. This is where most cases are won or lost. Strong evidence discovered during this phase often prompts settlement offers from defendants who realize their exposure is larger than expected.

Common Mistakes That Sink Cases

The most common reason lawsuits fail is not weak facts — it is procedural errors that are entirely avoidable. Knowing what to avoid can save your case before it starts.

• Missing the statute of limitations: This is fatal. There is no remedy once the deadline passes.
• Filing in the wrong court: Jurisdictional errors lead to dismissal and wasted time.
• Improper service of process: If the defendant is not served correctly, the case cannot proceed.
• Posting about the case on social media: Anything you write publicly can be used as evidence against you.
• Failing to mitigate damages: Courts expect plaintiffs to take reasonable steps to reduce their own losses. If you did nothing to limit harm after the defendant's action, your recovery may be reduced.
• Signing a release without reading it: Some settlements include broad release language that bars all future claims — even ones you did not know you had.

Frequently Asked Questions

How long does it take to file a lawsuit?

Preparing and filing a complaint typically takes one day to several weeks, depending on complexity. The overall case — from filing to resolution — can take months to years. Simple small claims cases often resolve in 30 to 70 days.

How much does it cost to file a lawsuit?

Filing fees in civil court range from $30 to $400 depending on the state and court level. Small claims fees are usually under $100. Many plaintiff-side attorneys work on contingency, meaning you pay nothing upfront and the attorney's fee comes out of the settlement or judgment.

Can I sue a company without a lawyer?

Yes, you can represent yourself (called "pro se") in most courts. Small claims court is specifically designed for self-represented plaintiffs and has simplified procedures. For complex civil cases, self-representation significantly increases your risk of losing due to procedural errors.

What is the statute of limitations for suing a company?

The deadline depends on the claim type and the state where you are filing. Personal injury claims are typically 2–3 years from the date of harm. Breach of contract is usually 3–6 years. Employment discrimination claims under federal law require filing with the EEOC within 180 to 300 days. Check your state's specific rules immediately — waiting too long is the most common reason valid claims are lost.

What happens if I miss the statute of limitations deadline?

If you file after the deadline, the defendant will almost certainly move to dismiss your case, and the court will grant it. You permanently lose the right to sue on that claim, regardless of how strong it is. There are narrow exceptions — such as tolling for minors or for fraud concealment — but they are not guaranteed.

What is the difference between a class action and a mass tort?

In a class action, all plaintiffs are treated as one group and share a single settlement. In a mass tort, each plaintiff keeps their own case and can recover damages based on their specific injuries. Mass torts are common in pharmaceutical and medical device litigation where individual harm levels vary widely.