To file a breach of contract lawsuit, first make sure your contract actually lets you sue in court, confirm the filing deadline hasn’t passed, send a written demand for payment, then draft a complaint and summons, file them with the correct court, and formally serve the other party. The order matters. A step skipped or done out of sequence can get the case dismissed before a judge reads a word of it.
Check the Contract for Clauses That Block a Lawsuit
Before anything else, read the contract for language that changes where or how disputes get resolved.
An arbitration clause is the biggest one. Under federal law, a written arbitration provision in any contract involving commerce is “valid, irrevocable, and enforceable.”1Office of the Law Revision Counsel. 9 USC 2 If your contract has one, filing a traditional lawsuit almost always fails. The other side moves to dismiss, and the court sends you to a private arbitrator whose decision is generally final with no right to appeal.
A mediation clause is less absolute but still binding. Some contracts require the parties to attempt mediation before either side can sue. Courts treat that as a condition you have to satisfy first, and a judge may either dismiss the case or pause it until mediation happens.
A forum selection clause tells you which court or jurisdiction has to hear the dispute. File in the wrong place and expect dismissal or transfer.
Confirm the Filing Deadline
Every breach of contract claim has a statute of limitations. Miss it and you lose the right to sue, no matter how strong the underlying case is.
The deadline depends on the type of contract and the state law that governs. Written contracts commonly get three to ten years, with six years being typical. Oral contracts usually get a shorter window, often two to six years. Contracts for the sale of goods follow the Uniform Commercial Code: four years from the date of the breach, though the parties can shorten that in the agreement to as little as one year.2Legal Information Institute. UCC 2-725 Statute of Limitations in Contracts for Sale
The clock usually starts when the breach occurs, not when you find out about it. If you’re close to the deadline, file first and negotiate later. A pending lawsuit can always be settled. An expired claim can’t be revived.
Send a Demand Letter
A written demand letter isn’t legally required in most cases, but sending one before you file does real work. It puts the other side on formal notice of the breach, states what you believe you’re owed, and gives them a deadline to pay or respond. A lot of disputes settle at this point.
The letter should identify the contract, describe how the other party failed to perform, calculate your damages, and set a firm response deadline. Fourteen to thirty days is typical. Keep the tone direct and professional. If the contract has a notice provision requiring written notice of a breach before legal action, the demand letter can double as that notice.
Save a copy along with proof of delivery. In court, the letter becomes evidence that you tried to resolve the matter before filing, and it anchors the timeline of the dispute.
Gather Your Evidence
A breach of contract claim requires proof of four things: a valid contract, your own performance, the other party’s failure to perform, and financial harm you suffered because of it. Every element needs documentation.
- The contract itself. A signed written agreement is strongest. For an oral agreement, pull together emails, text messages, invoices that reference the deal, or people who witnessed the agreement.
- Your performance. Payment receipts, delivery confirmations, photographs of completed work, or correspondence acknowledging what you did.
- The breach. Emails admitting a missed deadline, photographs of defective work, bank statements showing non-payment, records of goods that never arrived.
- Your losses. Every dollar the breach cost you: replacement contractor invoices, lost revenue, added expenses, anything directly traceable to the breach.
One point that trips people up: you have a duty to mitigate. Courts expect reasonable steps to limit your losses after a breach. If a contractor walks off your project, you can’t let a half-finished building sit while damage accumulates; you need to hire a replacement within a reasonable time. Fail to mitigate and the court can reduce your award by what you could have saved. Keep records of what you did to contain the harm.
Pick the Right Court
You need a court with authority to hear the case and a location that fits the dispute. Get either wrong and the case gets dismissed or transferred.
Which Court by Amount
The amount in controversy usually determines the court. Small claims courts handle lower-value disputes with simplified procedures and no lawyers required, with monetary limits that vary by state from around $2,500 up to $25,000. Above those limits, you file in a court of general jurisdiction, called superior court, circuit court, or district court depending on the state.
Federal court is available in limited situations. The usual route for a contract dispute is diversity jurisdiction: you and the defendant must be citizens of different states, and the amount in controversy has to exceed $75,000.3Office of the Law Revision Counsel. 28 U.S. Code 1332 – Diversity of Citizenship; Amount in Controversy Same-state parties stay in state court regardless of dollar amount.
Where to File Geographically
Venue is the specific county or district. In federal court, you can generally file where any defendant resides if all defendants live in that state, or where a substantial part of the events giving rise to the claim occurred.4Office of the Law Revision Counsel. 28 U.S. Code 1391 – Venue Generally State rules are similar but vary. A forum selection clause in the contract usually controls.
The court also has to have authority over the defendant. That’s automatic for individuals who live there and for companies headquartered or doing substantial business there. Suing someone out of state means showing they have enough contacts with the forum, like regular business there or a contract performed there.
Decide What You’re Asking For
Before drafting the complaint, know the remedy you want. It shapes the whole case.
- Compensatory damages. The most common form. Money to put you in the position you’d be in if the contract had been performed, including direct losses and consequential losses like lost profits, as long as those losses were foreseeable when the contract was signed.
- Liquidated damages. Some contracts specify the damages owed on a breach in advance. Courts enforce these if the amount is reasonable in relation to the anticipated harm. An unreasonably large figure can be struck down as a penalty.
- Specific performance. A court order forcing the other party to actually perform. Courts reserve this for cases where money can’t make you whole, mostly real estate and unique goods.
You can request more than one form of relief in the same lawsuit. Complaints often ask for compensatory damages first and specific performance as an alternative.
Draft the Complaint and Summons
The complaint is the document that starts the lawsuit. Under the federal rules, it must contain a short statement establishing the court’s jurisdiction, a short statement of the claim showing you’re entitled to relief, and a demand for the specific relief you want.5Office of the Law Revision Counsel. 28 USC App Fed R Civ P Rule 8 – General Rules of Pleading State requirements are similar. Some states call the document a petition rather than a complaint.
The complaint opens with a caption identifying the court and the parties. The body uses numbered paragraphs to lay out the facts: when the contract was formed, what each side promised, how you performed, how the defendant breached, and the damages that resulted. The prayer for relief at the end states exactly what you want, whether that’s a dollar figure, an order compelling performance, or both.
The summons is a separate form that notifies the defendant of the lawsuit and sets the time to respond. Most courts provide blank forms through the clerk’s office or the court website.
File With the Court
Take the complaint and summons to the clerk of the court where you’re filing. The clerk logs the case, assigns a case number, and collects the filing fee. Federal civil filing costs $405.6United States Courts. Civil Cases State fees vary widely: small claims filings can run under $100, while general civil complaints commonly cost $200 to $400 depending on jurisdiction and amount.
If you can’t afford the fee, federal courts can waive it. Under 28 U.S.C. ยง 1915, a court may authorize you to proceed without prepaying fees if you file an affidavit showing you’re unable to pay.7Office of the Law Revision Counsel. 28 U.S. Code 1915 – Proceedings In Forma Pauperis Most state courts have their own fee waiver process.
Serve the Defendant
After filing, you have to formally deliver the papers to the defendant through service of process. Mailing or emailing the documents yourself doesn’t count. Under the federal rules, any person at least 18 years old who isn’t a party to the case may serve the summons and complaint.8Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons Most people hire a professional process server or use the local sheriff.
Service on an individual can be made by handing the papers directly to the defendant, leaving copies at their home with someone of suitable age who lives there, or delivering copies to an authorized agent.8Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons State rules are often similar but not identical.
Whoever serves the papers then completes a proof of service, a sworn statement of when, where, and how delivery happened. File it with the court. Without it, you can’t prove service, and the case stalls.
What Happens After Service
In federal court, the defendant has 21 days after being served to file a response.9Legal Information Institute. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections State deadlines usually fall between 20 and 30 days. The response, called an answer, addresses each allegation by admitting, denying, or stating a lack of knowledge. It can also raise affirmative defenses: legal reasons the defendant claims to owe nothing even if the facts are true, such as no valid contract, prior breach by you, expired statute of limitations, or fraud.
If the defendant ignores the lawsuit and misses the deadline, you can ask the clerk to enter a default. Once default is entered, you can seek a default judgment: a ruling in your favor without a trial.10Office of the Law Revision Counsel. 28 USC App Fed R Civ P Rule 55 – Default The clerk can sometimes enter judgment directly if the claim is for a set dollar amount. Otherwise you’ll need a short hearing to prove damages.
If the defendant answers, the case moves into discovery, where both sides exchange information: written questions answered under oath, requests for documents, and depositions. Initial disclosures of witnesses, documents, and damage calculations are due within 14 days of the parties’ planning conference. Each side generally has 30 days to respond to written discovery requests. Discovery is where most of the time and money goes, and where settlement talks usually intensify.
Costs Beyond the Filing Fee
Expect to pay for process serving, typically $50 to $100, along with copying and postage, and possibly expert witness fees if your damages need specialized calculation. Attorney fees for a breach of contract case range from a few thousand dollars for a simple dispute to tens of thousands for complex litigation that runs through discovery and trial.
Under the American rule that governs most U.S. litigation, each side pays its own attorney fees regardless of who wins. The main exception is a fee-shifting clause in the contract itself: language stating that the losing party pays the winner’s legal costs. These clauses are enforceable and cut both ways. If you sue and lose, you pay the other side’s lawyers. Read your contract for this language before filing, because it changes the risk of the case. Courts can also shift fees when a party acts in bad faith, such as filing a frivolous suit or dragging out proceedings on purpose.