How to File a Civil Lawsuit: A Step-by-Step Guide

To file a civil lawsuit, you confirm you have a valid legal claim, sue the correct party in the right court before the deadline, draft and file a complaint with the court clerk, pay the filing fee, and then formally serve the defendant with the summons and complaint. Exact forms, fees, and time limits vary by state and court, so verify the details with the court where you plan to file.

This article is general legal information, not legal advice. Laws vary by state and situation, and reading it does not create an attorney-client relationship. For advice about your case, talk to a licensed attorney.

Key Takeaways

• Filing a lawsuit is mostly procedural, but the rules are strict. A small mistake on the court, the defendant's legal name, or service of process can get your case dismissed.
• Check the statute of limitations first. If the filing deadline for your type of claim has passed, the court will almost always throw the case out no matter how strong it is.
• The complaint is the document that starts the case. It must name the parties, state the court's authority, lay out the facts, identify your legal claim, and say what you want.
• Filing fees commonly run from under $100 in small claims to several hundred dollars in general civil court, and fee waivers exist for people who cannot afford them.
• Filing is not the end. You must serve the defendant correctly and file proof of service, or the case cannot move forward.
• Small claims court is faster and cheaper for smaller dollar amounts, and most states let you appear without a lawyer there.

What "Filing a Civil Lawsuit" Actually Means

A civil lawsuit is a dispute between private parties (people, businesses, or sometimes government entities) where one side, the plaintiff, claims the other side, the defendant, caused harm or broke a legal obligation. Filing the lawsuit means submitting a formal written document called a complaint to a court, paying the required fee, and getting an official case started. Unlike a criminal case, no one is prosecuted by the government and losing does not mean jail time; the typical remedies are money damages or a court order requiring someone to do or stop doing something.

Filing is just the first phase. For the bigger picture of what happens after you sue, including discovery, motions, settlement, and trial, see our pillar guide, Civil Litigation: How Lawsuits Work in the U.S.. This article focuses on the front end: getting the case correctly on file.

Before You File: Three Things to Confirm

Skipping these checks is the most common way self-represented plaintiffs waste money on a case that gets dismissed.

1. You have a recognized legal claim. The facts have to add up to an actual cause of action the law recognizes, such as breach of contract, negligence, or fraud. Each cause of action has specific elements you must be able to prove. Feeling wronged is not the same as having a legal claim.
2. You are within the deadline. Every claim has a statute of limitations, and missing it usually ends the case permanently. Confirm yours before you do anything else, and read Statute of Limitations: How Long You Have to File a Civil Lawsuit if you are unsure where your claim falls.
3. You know who and where to sue. You have to name the correct legal entity (a person, or the exact business structure such as an LLC or corporation) and file in a court that has authority over both the case and the defendant.

How to File a Civil Lawsuit, Step by Step

The sequence below works in most state general civil courts. Federal court procedure differs and usually requires a licensed attorney. Always confirm the specific forms, fees, and timing with the clerk of the court where you plan to file.

Step 1 — Confirm You Have a Valid Claim

Match your facts against the elements of a recognized cause of action. For a breach of contract claim, for example, you generally need a valid contract, your own performance (or a valid excuse), the other side's breach, and damages you suffered as a result. If you are not sure your facts satisfy every element, a short consultation with a civil litigation attorney before filing can save you the fee and the months that follow.

Step 2 — Identify the Correct Defendant

You must sue the right legal person or entity. If you are suing a business, find out whether it is a sole proprietorship, partnership, LLC, or corporation, because the proper defendant and its legal name differ for each. Your state's Secretary of State business database usually lists the entity's exact name and its registered agent for service. Suing the wrong entity, or misnaming the right one, can sink your case. If your defendant is a government agency, special notice-of-claim requirements often apply before you can sue at all, sometimes with very short deadlines.

Step 3 — Choose the Right Court

Ask yourself a few questions:

• Is the amount small? If your claim is within your state's small claims limit, small claims court is usually faster, cheaper, and built for people without lawyers.
• Is it larger? File in the general civil division of your state trial court.
• Does federal law or diversity apply? Federal courts have limited authority. They generally hear cases involving federal law or disputes between parties from different states where more than $75,000 is at stake.
• Which location (venue) is correct? Venue is usually where the defendant lives or operates, or where the events happened.

Not sure whether small claims is right for your dispute? Our small claims eligibility tool can help you weigh the dollar limits and trade-offs.

Step 4 — Verify the Statute of Limitations

Confirm the filing deadline for your specific claim type and state has not expired. Deadlines vary widely; many breach-of-contract claims run 3 to 6 years and many personal injury claims 2 to 3 years, but these are only examples and you must verify your own. If you are close to the deadline, treat it as urgent and consider getting an attorney involved immediately. Our statute of limitations tool is a starting point, but it is not a substitute for legal advice.

Step 5 — Send a Demand Letter (If Appropriate or Required)

Some contracts and statutes require a written demand before you can sue. Even when it is not required, a demand letter often prompts a settlement and creates a record that you tried to resolve things first. A good demand letter identifies the parties, describes the dispute, states what you want (an amount or a specific action), and sets a response deadline.

Step 6 — Draft or Obtain the Complaint

The complaint (called a "petition" in some states) is the document that starts your case. It must:

• Identify all plaintiffs and defendants
• State why this court has jurisdiction and is the proper venue
• Describe the facts behind the dispute
• State your legal cause(s) of action
• State the relief you want (a damages amount, an injunction, or other remedy)

Many state courts publish official fill-in complaint forms for common dispute types. Check the court's self-help center or website before drafting from scratch.

Step 7 — File With the Court Clerk and Pay the Fee

Submit the original complaint, plus any required copies, to the court clerk in person, by mail, or through the court's e-filing system where available. Pay the filing fee, or apply for a fee waiver if you cannot afford it. The clerk stamps the complaint, assigns a case number, and issues a summons, the document that officially tells the defendant they have been sued.

Step 8 — Serve the Defendant

The defendant has to be formally notified through "service of process." You generally cannot serve the papers yourself. Common methods include personal delivery by a process server or sheriff, certified mail where state rules permit, and substitute service on an appropriate household member. Service must be completed within the time your state allows after filing (commonly 60 to 120 days, but verify yours), and you must file proof of service with the court. Improper service is a frequent reason cases stall or get dismissed.

Step 9 — Wait for the Response and Move Forward

The defendant has a set period to respond, commonly 20 to 30 days in state court and 21 days in federal court. They may file an Answer, a Motion to Dismiss, or another response. If they do not respond at all, you can ask the court for a default judgment. Once an Answer is filed, the case moves into the discovery process, where both sides exchange information.

Documents You Will Likely Need

Document	What it does	Who handles it
Complaint / petition	Starts the lawsuit and states your claim	Plaintiff drafts and files
Civil cover sheet	Gives the court basic case info for routing	Plaintiff files with the complaint
Summons	Officially notifies the defendant they are sued	Court clerk issues; plaintiff serves
Filing fee or fee waiver application	Pays for (or excuses) the cost of filing	Plaintiff submits
Proof of service / return of service	Shows the court the defendant was properly served	Server completes; plaintiff files
Exhibits (contracts, invoices, photos)	Support the facts in your complaint	Plaintiff attaches as required

Form names and requirements vary by court. Confirm the exact packet with your clerk's office before filing.

Important Deadlines (Verify Every One)

Deadlines are where unrepresented plaintiffs get hurt most. The following are general patterns only and vary by state, court, and claim type, so you must verify each one for your case:

• Statute of limitations: The outer deadline to file at all. Missing it almost always ends the claim.
• Time to serve the defendant after filing: Often 60 to 120 days; failing to serve in time can lead to dismissal.
• Defendant's response window: Commonly 20 to 30 days in state court, 21 days in federal court, which sets when you can seek a default if they ignore the case.
• Government notice-of-claim deadlines: If you are suing a public entity, written notice may be required first, sometimes within as little as a few months of the injury.

When a deadline is close, talk to a licensed attorney right away rather than risk losing your rights.

Common Mistakes That Sink a Case Early

• Suing the wrong entity. Naming a business's owner instead of the LLC, or guessing at the legal name, can be fatal. Pull the exact name from the state business registry.
• Filing in the wrong court. Wrong dollar tier, wrong venue, or assuming federal jurisdiction when there is none leads to dismissal or transfer.
• Botching service. Mailing the papers yourself, serving the wrong person, or missing the service deadline are all common and avoidable.
• Missing the statute of limitations. Even a day late usually ends the claim.
• A vague complaint. A complaint that does not state the elements of a real cause of action can be dismissed on a motion before the defendant ever has to answer.
• No documentation. Filing without the contracts, invoices, or records that prove your claim weakens you the moment discovery and settlement talks begin.

When to Talk to a Lawyer

You can represent yourself ("pro se") in civil court, and many people do, especially in small claims. But the more money, complexity, or risk involved, the more a lawyer is worth it. Consider getting counsel when the amount is significant, the other side has a lawyer, the facts or law are complicated, you are suing a government entity, the deadline is near, or a business needs to sue (most states will not let a corporation or LLC represent itself in court). You can find attorneys by practice area through the civil litigation lawyer directory, and learn more about the field on the civil litigation practice area hub.

Costs and Fees to Expect

Filing fees vary widely by court and case type. Small claims filings often cost under $100, while filing a general civil complaint commonly runs from roughly $100 to several hundred dollars. Beyond the filing fee, expect possible costs for service of process, certified copies, and, if you hire one, attorney fees (charged hourly, on a flat-fee basis, or on contingency depending on the case). Most courts offer a fee waiver process for people who cannot afford to pay. Fees change periodically, so check the specific court's current schedule before you file.

State and Local Differences

Civil procedure is largely a matter of state law, so almost every detail in this guide can shift depending on where you file. The court's name, the complaint or petition format, available official forms, small claims dollar limits, service rules, response deadlines, and filing fees all vary by state and sometimes by county. Some courts require electronic filing; others still take paper. Always rely on the rules and forms published by the specific court where your case belongs, not on general descriptions.

Helpful Resources

• Your state court's official website and self-help center, which often publish free civil and small claims forms and instructions
• The clerk of court's office for the county where you plan to file, for current fees and local filing rules
• Your state's Secretary of State business entity database, to confirm a business defendant's exact legal name and registered agent
• The U.S. Courts website (uscourts.gov) for general information on the federal court system and the Federal Rules of Civil Procedure
• Local legal aid organizations and court-affiliated self-help centers for low-cost or free guidance

Frequently Asked Questions

How do I start a civil lawsuit?

You start a civil lawsuit by filing a complaint with the proper court, paying the filing fee (or getting a waiver), and then formally serving the defendant with the summons and complaint. Before filing, confirm you have a valid legal claim, that you are within the statute of limitations, and that you are naming the correct defendant in a court that has authority over the case.

How much does it cost to file a civil lawsuit?

It depends on the court and the type of case. Small claims filings often cost under $100, while general civil complaints commonly run from about $100 to several hundred dollars. There can be additional costs for service of process and copies, plus attorney fees if you hire a lawyer. Most courts offer fee waivers for people who cannot afford the cost. Check the specific court's current fee schedule.

Can I file a lawsuit without a lawyer?

Yes. Individuals can represent themselves, which is called appearing "pro se," and it is most practical in small claims court where procedures are simplified. In complex civil cases, self-representation is much harder because of strict procedural and evidence rules. Note that businesses such as corporations and LLCs generally cannot represent themselves and must hire an attorney in most states.

What court should I file my lawsuit in?

The right court depends on the dollar amount (small claims for smaller amounts, general civil court for larger ones), whether federal or state law applies (most cases belong in state court), and geography (venue is usually where the defendant lives or operates, or where the events occurred). Filing in the wrong court can get your case dismissed or transferred, so confirm with the clerk if you are unsure.

What is the difference between filing and serving a lawsuit?

Filing means submitting your complaint to the court so the case officially exists and gets a case number. Serving means formally delivering the summons and complaint to the defendant so they are legally notified and the response clock starts. Both are required. A case that is filed but never properly served cannot move forward and can be dismissed.

How long after filing do I have to serve the defendant?

It varies by state, but the window is commonly 60 to 120 days after filing. If you miss the service deadline, the court can dismiss the case. You generally cannot serve the papers yourself; you typically use a process server, sheriff, or another permitted method, and then you must file proof of service with the court. Verify your state's exact deadline.

What happens after I file and serve the lawsuit?

The defendant has a set time to respond, commonly 20 to 30 days in state court. They may file an Answer, a Motion to Dismiss, or another response, or they may file nothing, in which case you can ask for a default judgment. Once an Answer is filed, the case enters discovery, where both sides exchange information, and then moves toward settlement or trial.

Can I still file if the statute of limitations might have passed?

You can attempt to file, but if the deadline has expired the defendant can ask the court to dismiss the case, and courts almost always grant that dismissal. Limited "tolling" exceptions can pause the clock in some situations, such as when the injured party was a minor or the defendant concealed the wrongdoing. Whether an exception applies requires legal analysis, so talk to an attorney before assuming you are barred or in the clear.

Talk to a Civil Litigation Attorney

Filing a civil lawsuit correctly takes more than paperwork; the wrong court, a misnamed defendant, a missed deadline, or improper service can end a strong case before it starts. If your dispute involves real money, a business, a government entity, or a deadline that is approaching, get advice early. Connect with a licensed civil litigation attorney through our civil litigation lawyer directory to review your claim before you file.