To sue for breach of contract, you send the other side a written demand, confirm your agreement doesn’t force you into arbitration or mediation first, file a complaint in the right court before the statute of limitations runs out, and prove four things: a valid contract existed, you performed your side, the other party didn’t perform theirs, and you lost money as a result. Everything else — the evidence you gather, the court you choose, the damages you ask for — flows from those basics. Most contract cases settle before trial, so much of the work is building a position strong enough to force a fair outcome without ever sitting in front of a judge.
Read Your Contract Before You Do Anything Else
Open the contract and read it end to end. You are looking for clauses that control how disputes have to be handled, because ignoring them is one of the fastest ways to lose a case on procedure alone.
An arbitration clause sends disputes to a private arbitrator instead of a judge. Under the Federal Arbitration Act, when a lawsuit covers an issue governed by a written arbitration agreement, the court must pause the case until arbitration is done.1Office of the Law Revision Counsel. 9 USC 3 – Stay of Proceedings Where Issue Therein Referable to Arbitration The complaint isn’t thrown out, but you get no trial until arbitration runs its course.
A mediation clause is different. Mediation is a non-binding negotiation with a neutral third party. Courts have dismissed or paused breach of contract cases where the plaintiff skipped a contractual duty to mediate first. Language like “the parties shall mediate before filing suit” is a gate you have to walk through.
Also look for a forum selection clause, which specifies where lawsuits have to be filed, and a notice provision, which spells out how formal communications like a demand letter must be sent. If your contract has one, follow it exactly. When you signed multiple agreements with conflicting dispute-resolution terms, a court decides which controls.
Send a Demand Letter
A demand letter is a written notice telling the other party they breached the contract and stating what you want them to do. It’s usually not legally required, but it’s almost always worth sending. Courts favor parties who tried to resolve the dispute first, and a solid letter often produces a settlement without any lawsuit at all.
A workable demand letter identifies the contract and the specific terms that were breached, explains what the other party did or failed to do, describes your losses with supporting documents attached (invoices, receipts, quotes for corrective work), states what you want (a specific dollar amount or a specific action), sets a deadline of roughly 10 to 30 days, and makes clear you’ll file suit if the deadline passes.
Send it by certified mail with return receipt requested, or another method that creates proof of delivery. If the contract has a notice provision, use the method it requires. Keep copies of the letter, the delivery confirmation, and any reply. In court, that exchange — or the other side’s silence — becomes evidence.
Know Your Filing Deadline
Every breach of contract claim has a statute of limitations. Miss it and the court will dismiss your case if the defendant raises the issue, no matter how strong the underlying claim is.
The deadline depends on your state and on whether the contract is written or oral. Written contracts generally allow between three and six years in most states, with a few going up to ten. Oral contracts run shorter, often two to four years. The clock usually starts on the date of the breach, not the date you discovered it, though some states apply a discovery rule in narrow circumstances.
If your deadline is close, file first and keep gathering evidence and negotiating after the case is on the docket. Filing preserves the claim; waiting can destroy it.
What You Have to Prove
To win a breach of contract case, you have to establish four elements. Fail on any one and the case fails.2Legal Information Institute. Breach of Contract
- A valid contract existed. The agreement can be written, oral, or implied by the parties’ conduct. There must be mutual agreement on essential terms, an exchange of something of value (called consideration), and both parties must have had the legal capacity to enter it.
- You performed your obligations. You have to show you held up your side, or that you had a legally recognized excuse for not doing so. If you were supposed to pay on delivery, you need to prove you were ready and able to pay.
- The other party failed to perform. This is the breach itself. It can be a complete failure — never delivering — or a partial one, like a contractor using cheaper materials than the specifications required.
- You suffered actual damages. There has to be a direct financial loss you can quantify, connected to the breach. A late delivery is only actionable if the delay actually cost you money.
Material vs. Minor Breaches
Not every broken promise justifies a lawsuit. Courts separate material breaches — significant failures that undermine the whole purpose of the contract — from minor ones that cause little real harm. A homebuilder who installs the wrong brand of faucet committed a minor breach. A homebuilder who never finishes the roof committed a material one.
When drawing the line, courts weigh how much of the expected benefit you lost, whether the breach can be cured, whether the breaching party acted in good faith, and how likely they still are to perform. With a minor breach, you can still recover for whatever loss you actually suffered, but you generally can’t walk away from the entire contract or collect large sums. Focus your case on breaches that genuinely defeated the point of the deal.
A Note on Contracts That Have to Be in Writing
A rule called the statute of frauds requires certain contracts to be in writing to be enforceable. If your agreement falls into one of these categories and you only have a handshake, expect the defendant to attack the case on that basis before you ever reach the merits. The main categories are real estate transactions, contracts that by their terms can’t be completed within one year, sales of goods priced at $500 or more under the Uniform Commercial Code,3Legal Information Institute. UCC 2-302 – Unconscionable Contract or Clause promises to pay someone else’s debt, and agreements made in consideration of marriage. The writing doesn’t have to be a formal contract; an email, a text, or a signed note can satisfy the requirement if it identifies the parties, describes essential terms, and is signed by the party being held to it.
Your Duty to Limit Your Own Losses
Once a breach happens, or once it’s clear the other side won’t perform, you have a legal duty to take reasonable steps to reduce your losses. Lawyers call this mitigation of damages, and ignoring it can shrink your recovery.4Legal Information Institute. Mitigation of Damages
The standard is reasonableness, not perfection. If a vendor stops supplying materials mid-project, you’re expected to look for a replacement at a comparable price. You’re not expected to accept a clearly worse deal or take extraordinary measures. Think about what a sensible business owner in the same spot would do.
If a court finds you let losses pile up when you could have acted, it will subtract the avoidable portion from your award. Document what you did: save emails to replacement vendors, keep bids and quotes, and note the dates you took action. Without that paper trail, the other side will argue your losses were avoidable, and the court may agree.
Gather Your Evidence
Start with the contract, including any amendments, addendums, or side agreements. These define what each party owed the other and anchor everything that follows.
Then collect proof that you performed and the other party didn’t. Bank statements, canceled checks, and payment receipts show you met financial obligations. Emails, texts, and letters discussing the agreement or the breach are often the strongest evidence in contract cases, because they contain admissions or fix a timeline the other party can’t dispute later.
For physical breaches — defective construction, damaged goods, unfinished work — take photos or video. To prove financial loss, gather invoices for corrective work, quotes from other professionals, and records of lost revenue tied to the breach. Include your mitigation records too. Strong damages evidence is often what separates a favorable settlement from a case that drags on.
Pick the Right Court
You have two basic choices: small claims court or general civil court. The right one depends mostly on how much money is at stake.
Small claims courts handle smaller disputes, with maximums ranging by state from a few thousand dollars up to about $25,000. They’re built for self-represented parties: procedures are simplified, hearings are faster, and attorneys are restricted or barred in many jurisdictions. The trade-offs are that most states don’t let you appeal, and the streamlined process limits discovery and complex arguments.
If your claim exceeds the small claims limit, you file in general civil court, which follows the full set of procedural rules including discovery, pretrial motions, and possibly a jury trial. You aren’t required to have a lawyer, but contract litigation in civil court is complex enough that going in against opposing counsel alone puts you at a real disadvantage.
You also have to file in the correct venue, meaning the correct location. Usually that’s the county where the defendant lives or does business, or where the breach happened. If your contract has a forum selection clause, it overrides the default.
Draft and File the Complaint
The complaint (called a petition in some states) is the document that starts the lawsuit. It tells the court and the defendant who you are, what happened, and what you want. A typical complaint has three parts.
The first identifies the parties and explains why this court has authority to hear the case. The second lays out the facts and legal claims in chronological order: when the contract was formed, what it required, how you performed, and how the defendant breached. Each legal claim gets its own numbered section. A simple case may have just one claim for breach of contract; more complex cases add related claims like fraud or unjust enrichment. The third states what you’re asking for — a specific dollar amount, an order compelling the defendant to perform, or both.5United States Courts. Complaint for a Civil Case Alleging Breach of Contract
Be specific about damages. “The defendant owes me money” isn’t enough. Calculate the number, explain how you got there, and tie each dollar to the breach. Vague damage allegations are the first thing opposing counsel attacks.
File the complaint with the clerk of the court you chose. Most courts accept filings in person, by mail, or electronically. A filing fee is due at submission and varies widely by court and case value, from under a hundred dollars in small claims to several hundred or more in higher-value civil cases. If you can’t afford it, most courts offer a fee waiver application.
Serve the Defendant
After filing, you have to formally deliver copies of the complaint and a court-issued summons to the defendant. This step, called service of process, is a legal requirement, and the case cannot move forward without it.6Legal Information Institute. Service of Process
You cannot serve the papers yourself. Accepted methods include hiring a professional process server (typically $40 to $200, more for complex situations), using the local sheriff’s department, or in some jurisdictions sending the documents by certified mail with return receipt requested.7Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons Whatever method you use, the point is to create a verifiable record that the defendant received notice. Defective service lets the defendant challenge it and potentially delay or derail the whole case.
What the Defendant Will Do Next
The defendant has a limited window to respond: 21 days under federal rules, and typically 20 to 30 days under state rules.8Legal Information Institute. Federal Rules of Civil Procedure Rule 12 Their response is called an answer. It addresses each allegation by admitting, denying, or stating the defendant lacks enough information to respond. The answer is also where the defendant raises affirmative defenses — reasons they shouldn’t be held liable even if your facts are true.
Instead of answering, the defendant may file a motion to dismiss arguing your complaint has a fatal flaw: you didn’t allege all four elements, the court lacks jurisdiction, or the statute of limitations already ran. If the court grants the motion, the case may end early unless the judge lets you fix and refile.
Common Defenses to Expect
Knowing what the other side will argue helps you prepare.
- No valid contract existed — no agreement, no consideration, or essential terms too vague to enforce.
- Statute of frauds — the contract had to be written and wasn’t.
- Statute of limitations — you waited too long.
- Prior breach — you breached first, which excused the defendant’s performance. This defense is more effective than most plaintiffs expect.
- Impossibility or impracticability — something beyond the defendant’s control made performance impossible.
- Fraud or duress — the defendant was tricked or coerced into signing, making the contract voidable.
- Unconscionability — the contract was so one-sided a court should refuse to enforce it. Courts can strike the entire contract or just the unfair clause.
- Waiver — you knew about the breach at the time and continued the relationship without objecting, giving up your right to complain now.
- Failure to mitigate — you didn’t take reasonable steps to limit losses, so the damages are inflated.
The defendant carries the burden of proving these defenses. But if your complaint doesn’t anticipate the obvious ones, especially prior breach and failure to mitigate, you’ll be on the defensive before you get to present your case.
Discovery
If the case gets past the initial response, it enters discovery, where both sides exchange information and evidence. Discovery includes written questions answered under oath, requests for documents like financial records and internal communications, depositions where witnesses answer questions with a court reporter transcribing, and requests for admission that ask the other side to confirm or deny specific facts. Discovery is usually the most expensive and time-consuming part of litigation, and it’s also where most cases either settle or fall apart, because once both sides see the actual evidence, the likely outcome becomes clearer.
What You Can Recover
Courts in breach of contract cases try to put you in the financial position you would have been in if the contract had been performed. The main categories of damages are as follows.
- Expectation damages. The most common remedy. Covers the value of what you were promised but didn’t get, plus other losses the breach caused, minus costs you avoided by not having to finish your own performance. If you hired a contractor to build an addition for $50,000 and they walked off halfway, expectation damages cover what it costs to hire someone else to finish.
- Consequential damages. Losses that flow indirectly from the breach but were foreseeable when the contract was signed. If a supplier’s late delivery forced you to shut down a production line, the lost profits may qualify, but only if the supplier knew or should have known that late delivery would cause that kind of harm.
- Liquidated damages. Some contracts specify damages in advance. Courts enforce these clauses if the amount is a reasonable estimate of anticipated losses and not a punishment. If it’s wildly out of proportion to any plausible harm, a court may strike it as an unenforceable penalty.9U.S. Department of Justice. Civil Resource Manual 74 – Liquidated Damages Provisions
- Nominal damages. If you prove a breach but can’t show actual financial loss, a court may award a small symbolic amount. This matters mostly for establishing wrongdoing, which can affect attorney fees under some contracts.
- Specific performance. In rare cases, a court orders the breaching party to actually perform. This remedy is reserved for situations where the subject of the contract is unique — most often real estate, one-of-a-kind goods, or custom-made items — and money alone wouldn’t make you whole.
Courts almost never award punitive damages in a pure contract dispute. Contract remedies are about compensation, not punishment. Unless the breach also involved conduct like fraud or bad-faith dealing that qualifies as a separate legal wrong, don’t expect a punitive award.
What It Costs and Why Most Cases Settle
Filing fees, process server costs, and court expenses are the smallest part of the bill. The real expense is attorney fees. Under the general American rule, each side pays its own lawyer regardless of who wins. The exception is a fee-shifting clause in the contract itself, saying the loser pays the winner’s fees. Check for that language, because it cuts both ways: it increases what you can collect if you win and what you owe if you lose.
For simple cases involving modest amounts, an attorney may charge a flat fee or work on a limited-scope basis. Complex commercial disputes with extensive discovery can run tens of thousands of dollars or more. Litigation is also slow — a case that goes through full discovery and trial can take a year or longer.
Because of those costs, settlement is the realistic endpoint for most contract disputes. If the other side makes a reasonable offer during discovery, weigh it honestly against the cost and uncertainty of trial. Even the strongest legal position loses value when litigation costs eat most of the recovery.