How to Sue Someone: The Complete Step-by-Step Guide (2026)

To sue someone, send a demand letter first, then file a complaint in the right court, serve the defendant, and show up to your hearing. Most people never need to go to trial. About 70% of cases settle after a demand letter alone.

What Does It Mean to Sue Someone?

When you sue someone, you file a civil lawsuit against them. You're asking a court to order them to pay you money or do something they promised to do.

A civil lawsuit is not the same as a criminal case. In a criminal case, the government charges someone with breaking the law. In a civil case, you're the one taking action. You're saying someone wronged you, and you want the court to fix it.

Here are the key words you'll hear in any lawsuit:

Lawsuits can happen between people, between a person and a company, or between two businesses. You don't need to be rich or have a lawyer to file one. Millions of people file civil cases every year on their own.

The court you file in depends on how much money you're seeking. Small claims courts handle smaller disputes quickly and cheaply. Civil courts handle bigger or more complex claims.

Can You Sue Someone? How to Know If You Have a Case

Not every bad situation is a legal claim. But many common ones are.

You likely have a valid case if someone:

The key question is: did someone cause you real harm that can be fixed with money? If yes, you probably have a case worth pursuing.

Keep in mind that winning in court and actually collecting money are two different things. Even if you win, you need to collect. If the defendant has no money or assets, a judgment might be hard to enforce. It's worth thinking about this before you file.

When in doubt, start with a demand letter. It's low cost and can reveal fast whether the other side will pay. Many people pay up the moment they receive a formal notice.

Can You Sue Someone for Emotional Distress?

Yes. You can sue someone for emotional distress. But it's harder to prove than a simple money claim.

There are two legal types of emotional distress claims:

IIED (Intentional Infliction of Emotional Distress) means someone did something extreme and outrageous on purpose to cause you emotional pain. Stalking, harassment campaigns, and threats can qualify. The behavior has to be severe. A rude comment or an awkward interaction doesn't meet the bar.

NIED (Negligent Infliction of Emotional Distress) means someone was careless and their actions caused you real emotional harm. Witnessing a loved one get hurt due to someone's negligence is a classic example.

To win either type of claim, you need to show real harm. Courts look for:

A vague claim of "I felt bad" won't win. You need documented proof of lasting harm.

Emotional distress claims work best when paired with another claim, like personal injury or harassment. If you're thinking about filing one on its own, talk to a lawyer first to see if your case is strong enough.

Can You Sue Someone for Slander?

Yes. You can sue someone for slander. Slander is a form of defamation, and defamation is a real legal claim.

Defamation means someone said something false about you and it hurt your reputation. There are two types:

To win a defamation case, you need to prove these four things:

  1. The person made a false statement of fact (not just an opinion)
  2. They said it to at least one other person
  3. The statement was about you specifically
  4. It caused you real harm (losing a job, losing clients, damaged relationships)

This matters a lot: opinions are not slander. "I think Jane is a bad contractor" is an opinion. "Jane stole money from me" when that's not true is a false statement of fact. Only the second one can lead to a slander lawsuit.

Public figures have a harder time winning defamation cases. They have to prove the person knew the statement was false or acted with reckless disregard for the truth. For private individuals, the bar is lower.

Slander and defamation cases are complex. They're hard to win without solid evidence. If you think you have one, consult with a lawyer before you spend money filing.

How to Sue Someone: Step-by-Step Process

Here's exactly how to sue someone, from first step to final resolution. Follow these steps in order.

Step 1: Send a Demand Letter First

Before you file anything in court, send a demand letter. This is a formal written notice. It tells the other person what happened, what they owe you, and what you'll do if they don't respond.

Demand letters work. About 70% of cases settle without ever going to court. Why? Because a formal letter puts the other person on notice. It shows you're serious and you know your rights. Many people pay up rather than deal with a lawsuit.

A good demand letter includes:

You can write one yourself. Check out this guide on how to write a demand letter for a full walkthrough.

Or you can use PettyLawsuit. A demand letter starts at $29 and goes out by certified mail the same day. No lawyer. No waiting. If you want more follow-through, the $49 "Go Full Petty" plan adds phone calls, follow-up emails, and a Final Notice on day 10.

Don't skip this step. It saves time, money, and stress. Most cases end here.

Step 2: Figure Out Where to File

If the demand letter doesn't work, you need to pick the right court.

Small claims court is the best starting point for most people. It's faster, cheaper, and designed for regular people without lawyers. Each state sets its own dollar limit. Most states cap claims between $5,000 and $25,000.

Civil court handles bigger claims and more complex legal issues. Cases here are slower and more expensive. You'll usually need a lawyer.

Check the small claims court limit by state to find your state's cap. If your claim is under the limit, go small claims. It's almost always the better choice for amounts under $10,000.

You also need to file in the right location. That usually means the county where the defendant lives or where the incident happened.

Step 3: Draft and File the Complaint

A complaint is the document that officially starts your lawsuit. It explains who you are, who you're suing, what they did, and what you want the court to order.

In small claims court, filing is simple. Most counties have a one-page form. You can usually get it at the courthouse front desk or download it from the court's website. Fill it out, pay the filing fee, and you're in the queue.

In civil court, the complaint is more detailed. It needs to state your legal theory, list the facts clearly, and specify the damages you're seeking. Most people hire a lawyer to draft civil court complaints.

Filing fees for small claims run from $30 to $75, depending on your state and claim amount. For civil court, expect $200 to $500 just to file.

Once you file, the court stamps your papers and assigns a case number. Now it's official. Keep copies of everything.

Step 4: Serve the Defendant

After you file, you have to officially notify the defendant. This is called "service of process."

The defendant must receive a copy of your complaint and a summons. The summons tells them they're being sued and when they need to respond or appear.

Common ways to serve someone include:

Rules vary by state. Some states handle service for you when you file. Others require you to arrange it. Ask the court clerk when you file. They can tell you exactly what's required.

Important: The case can't move forward until the defendant is properly served. If service fails, the case gets delayed.

Step 5: Discovery Phase

Discovery is the phase where both sides share evidence. You can request documents, records, photos, and other evidence from the defendant. They can do the same to you.

In small claims court, discovery is minimal or skipped entirely. You just show up with your evidence on the hearing date. Bring everything that supports your case: contracts, receipts, texts, photos, emails, invoices.

In civil court, discovery can be intense. It includes written questions (interrogatories), document requests, and depositions where witnesses answer questions under oath. Discovery alone can take three to twelve months in a civil case.

Even in small claims, prepare well. Organize your evidence in order. Know what you're going to say before you walk into the courtroom. The more prepared you are, the better you'll do.

Step 6: Try to Settle

Even after you file, settlement is still on the table. It should be. The goal isn't to "win" at trial. The goal is to get what you're owed.

Most civil cases settle before they reach trial. Both sides save time and money when they reach an agreement. A settlement also gives you certainty. A trial always carries risk.

Don't turn down a fair offer just to make a point. If the defendant offers you 80% of what you're owed, ask yourself: is the extra 20% worth another six months and more attorney fees?

You can negotiate directly or through lawyers. Get any settlement agreement in writing and signed before you dismiss the case.

Step 7: Go to Trial

If you can't settle, you go to trial. Both sides present their case. The judge or jury decides who wins.

In small claims court, trials are simple and fast. They usually last 15 minutes to an hour. You tell your story, show your evidence, and the judge asks questions. No fancy courtroom procedure required.

In civil court, trials can last days or weeks. Lawyers make opening and closing arguments. Witnesses testify. Both sides challenge each other's evidence.

If you win, the court enters a judgment in your favor. The defendant is ordered to pay you. If they don't pay voluntarily, you may need to take extra steps to collect, like garnishing wages or placing a lien on property.

If you lose, you walk away without the money. In small claims, you usually pay your own court costs. In civil court, you may owe the other side's legal fees. Winning isn't guaranteed, which is why settling is often the smart move.

How to Find a Lawyer (And When You Don't Need One)

One of the most common questions is how to find a lawyer. But the real question is: do you even need one?

When You Don't Need a Lawyer

For small claims court, you can represent yourself. Courts build the small claims process for ordinary people. The forms are simple, the hearings are casual, and judges are used to non-lawyers. Some states don't even allow lawyers in small claims court.

For most debt disputes, unpaid invoices, and property damage claims under a few thousand dollars, you don't need legal help. A demand letter and a small claims filing are enough. You can do all of this yourself.

See our full guide on how to sue a company without a lawyer for a detailed look at what's possible on your own.

When You Should Hire a Lawyer

Some situations call for legal help:

If the other side has a lawyer and you don't, you're at a real disadvantage. In those cases, it's worth the cost to level the playing field.

How to Find a Lawyer

Here are the best ways to get legal help:

For personal injury cases, most attorneys work on contingency. You pay nothing upfront. They take a cut only if you win.

What Does a Personal Injury Lawsuit Look Like?

A personal injury lawsuit is a civil case where you claim someone's negligence caused you physical harm. Car accidents, slip-and-fall injuries, dog bites, and medical malpractice are common examples.

Personal injury cases are different from typical small claims disputes. The differences matter:

In a personal injury lawsuit, you're trying to prove negligence. That means showing:

  1. The other person had a duty to act carefully
  2. They failed to meet that duty
  3. Their failure caused your injury
  4. You suffered real damages (medical bills, lost work, pain)

The contingency fee structure means most personal injury attorneys take 25% to 40% of what you recover. You pay nothing unless you win. This makes it financially possible for injured people to fight large corporations or insurance companies.

If you've been hurt due to someone's carelessness, talk to a personal injury lawyer soon. Most states have a statute of limitations on these claims. Waiting too long can kill your case.

How Much Does It Cost to Sue Someone?

The cost depends on how you approach it. Here's a plain breakdown of what to expect at each level:

Demand Letter: $29 to $49

A demand letter through PettyLawsuit costs $29. That includes certified mail tracking and same-day delivery. The $49 "Go Full Petty" plan adds phone calls to the defendant, automated follow-up emails, and a Final Notice on day 10.

This is the cheapest option and the most overlooked one. It's the right first move for almost every dispute. Many cases end here.

Small Claims Court: $50 to $200 total

Filing fees run from $30 to $75 in most states, based on your claim amount. Add $20 to $50 to have the defendant served. You don't need a lawyer, so the total out-of-pocket cost is usually under $200.

If you win, the defendant is often ordered to pay your filing costs too. That means your net cost can be zero.

Civil Court: $2,000 to $20,000+

Filing fees start at $200 to $500. Attorney fees are where costs explode. Even a simple civil case can cost $3,000 to $5,000 in attorney time. Complex cases can run $10,000 to $20,000 or more.

This route makes sense when the claim is large enough to justify the cost. Don't spend $10,000 chasing $3,000.

Personal Injury: Usually No Upfront Cost

Most personal injury lawyers work on contingency. You pay nothing to start. If you win or settle, they take 25% to 40% of the amount. If you lose, you owe nothing (though you may owe court costs in some cases).

This makes personal injury lawsuits accessible to almost anyone, no matter their income.

The bottom line: start with the cheapest option. A demand letter is $29. Small claims costs under $200. Only escalate to civil court when the amount justifies it.

Need more detail on the small claims process? Read our guide on how to file in small claims court. Or if someone owes you money specifically, check out how to sue someone for money owed.

Frequently Asked Questions

How do I sue someone?

Start with a demand letter. If that doesn't work, file a complaint in small claims court or civil court, depending on the amount. Pay the filing fee, serve the defendant, and show up to your hearing with your evidence ready.

How do you sue someone without a lawyer?

File in small claims court. It's built for self-representation. Fill out the complaint form at your local courthouse, pay the fee ($30 to $75), serve the other party, and present your case at the hearing. No lawyer required.

Can you sue someone for emotional distress?

Yes, but it's hard to prove. You need documented harm like therapy bills, medical records, or lost wages. Emotional distress claims work best when paired with another legal claim, like harassment or personal injury.

Can you sue someone for slander?

Yes. You need to prove the person made a false statement of fact about you, said it to others, and caused you real harm like losing a job or clients. Opinion statements don't count. These cases are hard to win without a lawyer.

How much does it cost to sue someone?

A demand letter costs $29 at PettyLawsuit. Small claims filing runs $30 to $75. Civil court can cost $5,000 to $20,000 or more with a lawyer. Personal injury cases are usually contingency, meaning no upfront cost.

How long does a lawsuit take?

Small claims cases usually take 30 to 90 days from filing to hearing. Civil cases can take one to three years. Personal injury cases often take one to two years. Cases that settle go faster than ones that go to trial.

Can you sue someone in another state?

Yes. You usually file in the state where the incident happened, where the defendant lives, or where the contract was signed. Small claims courts often require you to file where the defendant lives or where the dispute occurred. It's worth calling the court clerk first to confirm.

What happens if you sue someone and lose?

In small claims, you usually pay your own court costs and walk away. In civil court, you may owe the other side's legal fees. You can appeal the decision if you believe a legal error was made. Losing is a real risk, which is why settling is often the smarter path.

Ready to stop letting it slide? Start with a demand letter. It takes five minutes, costs $29, and works in 70% of cases without ever setting foot in a courtroom. Get started at PettyLawsuit today.