To sue a business, you file a written complaint in the correct court, pay the filing fee, and have the business formally served with the papers — but knowing how to sue a business also means doing the work that comes before and after that filing: confirming you have a legal claim, checking the deadline, sending a demand letter, naming the right legal entity, and, if you win, actually collecting what the court awards you. The steps below run in the order they matter.
Confirm You Have a Legal Claim
Being unhappy with a business is not a lawsuit. You need what lawyers call a cause of action: a recognized legal basis for asking a court to give you money or another remedy. Most claims against businesses come down to breach of contract or negligence.
A breach of contract claim has four parts. A valid contract existed. You did what you agreed to do. The business did not. You lost money because of that failure.
A negligence claim also has four elements:
- Duty. The business owed you some obligation of care. A grocery store, for example, has a duty to keep its floors reasonably safe for shoppers.
- Breach. The business failed to meet that obligation, such as leaving a spill unmarked for hours.
- Causation. The breach directly caused your injury. You slipped on that specific spill, not something else.
- Damages. You suffered real, measurable losses: medical bills, lost wages, repair costs.
If you cannot clearly identify each element for your situation, the case will struggle no matter how wronged you feel.
Check the Filing Deadline First
Every lawsuit has a statute of limitations. Miss it and the court will throw the case out no matter how strong your evidence is. Deadlines vary by state and by claim type. Personal injury lawsuits usually give you two to three years from the date of injury. Breach of contract claims commonly allow three to six years, depending on the state and on whether the contract was written or oral.
Some states apply a discovery rule: the clock starts when you discover the harm, or reasonably should have discovered it, rather than when the underlying conduct happened. If a contractor used defective materials and the damage did not show up for two years, the deadline may run from when the damage became apparent. States handle this differently, so treat any close deadline as urgent and check your state’s specific rule.
Send a Demand Letter
Before filing anything with a court, send the business a formal demand letter. It sets out what happened, what you want, and a deadline to respond. Some states require a demand letter before you can sue under certain consumer protection statutes. Even where it is optional, it is worth doing.
A demand letter often resolves the dispute without a lawsuit. The business may not know how serious the problem is, and its insurer may prefer a quiet settlement to litigation. If the case does end up in court, judges tend to view the party who tried to resolve things first more favorably, and the letter creates a paper trail of what you asked for and when.
Keep it factual. State the dates, the events, the dollar amount you are seeking, and a reasonable response window, usually 14 to 30 days. Send it by certified mail so you can prove it was received.
Identify the Correct Legal Entity
You have to sue the right defendant. Businesses often operate under a trade name that is not their legal name. If a restaurant calls itself “Joe’s Diner” but is registered as “JRD Holdings, LLC,” suing “Joe’s Diner” can get your case dismissed because the trade name is not, on its own, a legal entity that can be sued.
Every state maintains a business entity database through its Secretary of State’s office, searchable online. Look up the business to find its official legal name, entity type (corporation, LLC, partnership), and the name and address of its registered agent — the person or company designated to accept legal documents on the business’s behalf. You will need the registered agent’s information when it is time to serve the lawsuit.
If the business operates under a “Doing Business As” name, trace the DBA filing back to the actual entity. Those filings are public records too. Getting the name wrong can be fatal to your case if the statute of limitations expires while you are trying to correct it.
Gather Evidence and Calculate Damages
Collect everything related to the dispute before you file. Contracts, invoices, receipts, emails, text messages, photographs, and video all matter. If witnesses saw what happened, get their names and contact information now, while memories are fresh.
You also need a specific dollar figure. Courts do not award vague damages. Add up your actual losses: medical expenses, repair costs, payments that should be refunded, income you lost because of the business’s conduct. Keep documentation for every number. Future losses, like ongoing medical treatment, will eventually need expert testimony, but you can start with what you can already document.
Choose the Right Court
The amount at stake determines where you file. Every state has a small claims court for lower-value disputes, with limits that range from $2,500 to $25,000 depending on the state. Small claims uses simplified procedures, moves faster, and generally does not require a lawyer. If your damages exceed your state’s small claims cap, you file in a higher-level civil court, which is more formal and slower.
The court also has to have jurisdiction over the business. Usually that means the court in the county where the business is located, where the contract was signed, or where the harm occurred. Filing in the wrong court is one of the easiest mistakes to make and one of the first things the business’s lawyer will challenge.
File the Complaint
A civil lawsuit formally begins when you file a complaint with the court clerk and pay the filing fee. The complaint identifies you, identifies the business, describes what the business did wrong, and states the damages you want. Many courts accept electronic filing, and some require it.
Fees vary widely. Small claims filings can be under $100 for lower-value claims, though fees rise with the amount in dispute. Higher civil courts charge more. Federal district courts charge $405 to file a civil case. If you genuinely cannot afford the fee, most courts let you file a request to proceed without paying, called an in forma pauperis petition; the fee is waived if the court grants it.
Serve the Business
Filing puts your case on the docket, but the business is not officially on notice until you deliver the documents through service of process. You cannot hand the papers over yourself. An independent person who is not involved in the case has to do it.
For a corporation or LLC, service goes to an officer, a managing agent, or the registered agent you looked up earlier. Common options are the county sheriff’s office or a private process server. Private servers typically charge $75 to $200, more for businesses that are hard to locate. After delivery, the server files a proof of service with the court confirming when, where, and how the papers were delivered.
How the Business Responds
Once served, the business has a limited window to respond. In federal court that window is 21 days from service. State courts set their own deadlines, typically 20 to 30 days. The summons states the exact date.
The response usually takes one of two forms. An answer goes through each allegation and admits it, denies it, or says the business does not have enough information to respond, and it lays out any defenses. A motion to dismiss asks the court to throw the case out on grounds such as wrong court, missed statute of limitations, or failure to state a legally recognized claim.
If the business ignores the lawsuit and misses the deadline, you can ask for a default judgment. That means you win because the other side did not show up. The court still verifies your damages, and default judgments against properly served businesses are routinely granted when the complaint is solid.
Discovery
After the answer, the case enters discovery. Both sides are required to share relevant information, and this is often the longest and most expensive stretch of the lawsuit. It is also where many cases are won or lost.
The main tools:
- Interrogatories, which are written questions the other side must answer under oath.
- Requests for documents, formal demands for contracts, emails, internal records, and other paperwork.
- Depositions, in-person questioning of witnesses or company representatives, under oath and recorded by a court reporter.
- Requests for admission, statements the other side must admit or deny to narrow the disputed issues.
Discovery can change a case. You might turn up internal emails showing the business knew about a hazard and ignored it; the business might uncover facts that weaken your claim. Both sides have to share relevant evidence even when it hurts them, and parties that hide or destroy evidence face serious sanctions.
Settlement, Mediation, and Summary Judgment
Most civil cases never reach trial. Estimates based on Department of Justice data put settlements at roughly 95% of civil lawsuits. Settlement can happen at any stage, but most occur after discovery, once both sides have a realistic view of the evidence.
Many courts require mediation before scheduling trial. A neutral third party helps the sides negotiate, and nothing said in mediation can be used in court if talks fail. The mediator does not decide the case; the parties do. An agreement becomes a binding settlement.
If the case does not settle, either side can move for summary judgment, asking the court to decide without a trial because the key facts are not genuinely in dispute. Courts grant summary judgment only when the evidence is so one-sided that no reasonable jury could find for the other party. If denied, the case proceeds to trial.
Collecting a Judgment
Winning a judgment and getting paid are two different things. A judgment is a piece of paper saying the business owes you money. It does not put cash in your hand. If the business does not pay voluntarily, you use collection tools.
The most common one is a writ of execution, which directs a law enforcement officer to seize the business’s assets to satisfy the judgment. Depending on your state, that can mean levying bank accounts, seizing inventory or equipment, or garnishing payments the business’s own customers owe it. You can also record a judgment lien on real estate the business owns; the lien does not produce immediate cash, but the business cannot sell the property without paying you first. The recording process varies by jurisdiction.
If the business has no assets to reach, collection becomes difficult, and some judgments go uncollected for years. Before investing heavily in a lawsuit, think about whether the business can actually pay.
Who Pays the Attorney Fees
Under the American Rule, each side pays its own attorney fees regardless of who wins. Suing a business and winning does not automatically mean the business reimburses your legal costs. There are three main exceptions. A contract clause awarding fees to the prevailing party will be enforced. Certain federal and state statutes shift fees to the loser, particularly in consumer protection, employment discrimination, and civil rights cases. And if the business litigates in bad faith, a judge can order it to pay your fees as a sanction.
For many disputes, contingency fee arrangements are available: the attorney takes a percentage of your recovery, typically one-third, and charges nothing upfront. That is standard in personal injury cases. Breach of contract and commercial disputes are more often billed hourly, and costs climb quickly once discovery starts.
Do You Need a Lawyer
You are not legally required to hire an attorney. Representing yourself is called proceeding pro se. In small claims court it is the norm, and the simplified procedures are designed for people without legal training.
In regular civil court, going up against a business with its own lawyer puts you at a real disadvantage. Procedural rules are strict, discovery is complex, and the other side will know how to use mistakes you do not realize you are making. If your claim is worth more than a few thousand dollars, hiring a lawyer is almost always worth it. Many attorneys offer free initial consultations, and some will evaluate whether the case is strong enough to take on contingency before you spend anything.