Breach of Contract: What Counts and What You Can Do

The delivery never arrived. The invoice went unpaid. The developer went quiet in week three of a twelve-week build.

Your first instinct is that someone broke the contract. Legally that instinct is usually right, and it is also usually the least useful part of the question. Almost every commercial dispute involves a breach somewhere. What decides the outcome is narrower: how serious the failure was, what the contract said about handling it, and whether you can prove what was agreed in the first place.

This guide covers the four elements of a claim, the difference between a material and a minor breach, the remedies that are realistically available, and the defences the other side will raise.

Breach of contract is the failure of a party to perform a duty the contract imposes, at the time and in the manner required, without a legal justification.

Three parts of that definition do real work.

The duty has to exist. It must come from the agreement itself, whether written, spoken, or implied by conduct. A hope, a forecast, or a statement made during negotiations is not a duty unless it made it into the bargain. This is where a surprising number of claims die.

The failure has to be actual. Late is a breach. Partial is a breach. Defective is a breach. Doing the thing badly counts, and so does doing it a week after the deadline, even if it eventually arrives.

There must be no lawful excuse. Impossibility, frustration, a valid force majeure clause, the other party's own prior breach, or a waiver you granted in writing can all mean that non-performance is not a breach at all.

Getting this framing right matters because it changes what you have to prove. You are not proving that the other side behaved badly. You are proving that they owed you a specific thing and did not deliver it.

Courts in the United States look for four things. Miss one and the claim fails, however unfair the situation feels.

One: a valid contract existed. Offer, acceptance, consideration, and an intention to be bound. If you never nailed down scope or price, the argument may be that there was no enforceable agreement at all. Our guide to how to write a contract covers what has to be present.

Two: you performed, or you were excused. You cannot sue on a contract you breached first. If you stopped paying because the work was late, expect to defend that decision.

Three: the other party breached. Point to the clause. Point to the failure. Vagueness here is fatal, and specificity is what separates a claim that settles from one that stalls.

Four: the breach caused you loss. Damages must flow from the breach, not from the general misfortune of the deal. A breach with no measurable consequence gets you a declaration and nothing else.

The fourth element is where most claims shrink. Businesses often have a clear breach and no evidence of what it actually cost them.

Not all breaches carry the same consequences, and the label decides whether you can walk away.

Material breach. The failure goes to the heart of the bargain and deprives you of what you contracted for. A material breach lets you terminate, stop your own performance, and sue for damages. Courts weigh how much benefit you actually received, whether the other side can still cure, and whether they acted in good faith.

Minor breach. Sometimes called partial breach. Performance was defective or late, but you got substantially what you bargained for. You can recover damages for the shortfall. You cannot treat the contract as over, and terminating anyway turns you into the breaching party.

The boundary is not a formula. A one-day delay in a shipment of office chairs is minor. The same delay on catering for a wedding is material, because timing was the point.

Anticipatory repudiation. The other side states clearly, before performance is due, that they will not perform. You do not have to wait for the deadline to pass. You can treat the contract as breached immediately and start mitigating. The statement has to be unequivocal, and "we might have a problem" does not qualify.

Fundamental breach. A term used more in England and in international sales than in US practice. Where you see it, read it as a material breach severe enough to justify ending the contract.

The purpose of contract damages is to put you where performance would have put you. It is not to punish, and punitive damages are almost never available for breach alone.

Two constraints trip up most claimants.

Foreseeability. You recover the losses a reasonable person would have anticipated when the contract was made. If your supplier did not know that a two-day delay would cost you a major client, that loss may not be recoverable, unless you told them.

Mitigation. You must take reasonable steps to limit your loss. Sitting on your hands while the damage grows will reduce what you can claim, and the other side will point this out.

Assume every one of these will be raised. Preparing for them changes how you write the demand letter.

No valid contract. Missing consideration, no meeting of minds on essential terms, or an agreement that a statute required to be in writing. Land deals and agreements that cannot be performed within a year are the usual candidates.

You breached first. The most common defence in commercial disputes and often the most effective. If you withheld payment before they missed a milestone, the sequence matters.

Waiver. You accepted late delivery three times without objection, so you cannot suddenly treat the fourth as fatal. Silence is expensive.

Force majeure. Only as good as the clause. Read whether it lists the event, whether notice was required, and whether it suspends or excuses.

Impossibility or frustration. Performance became genuinely impossible or the purpose disappeared. Cost increases and inconvenience are not enough.

The statute of limitations expired. A complete defence regardless of the merits.

Failure to mitigate. Not a full defence, but it reduces the number.

Most commercial contracts contain a notice-and-cure provision. It says that before you can terminate, you must tell the other side what is wrong and give them a defined period to fix it.

Skip that step and you may become the breaching party yourself, even when the underlying complaint was sound. Courts enforce these clauses strictly, because both sides bargained for the chance to correct a problem before the relationship ends.

The practical sequence is simple. Identify the clause. Write the notice in the form the contract requires, to the address the contract names. State the failure, the clause it breaches, what would fix it, and the deadline. Then wait out the cure period before doing anything else.

This is where civil law systems and common law differ sharply. In France, Brazil, Spain and Germany, a formal demand to perform is a step the law itself requires in most cases, not just something your contract asked for. French law calls it a *mise en demeure*, German law a *Mahnung*, Spanish law an *intimación*, Brazilian law an *interpelação*. In the United States there is no general statutory equivalent, so whatever the contract says is the whole of the obligation.

If you are dealing with a counterparty in those jurisdictions, sending a proper written demand first is not optional politeness. It is often what makes damages and termination available at all.

Limitation periods for breach of contract are set by state law in the US, and they vary widely.

Written contracts commonly carry longer periods than oral ones, often four to six years against two to four. Contracts for the sale of goods fall under the Uniform Commercial Code, where the standard period is four years from when the breach occurred, whether or not you knew about it.

The clock usually starts at the breach, not at discovery. That catches people out. A defect that surfaces three years after delivery may already be most of the way through its limitation period.

Check the governing law clause before you check the calendar, because the contract may have chosen a state whose rules differ from your own. Some contracts also shorten the period by agreement, and many states allow that within limits.

A breach claim is won on documents far more often than on argument.

You need four things, and the order matters.

The contract, in its final agreed version. Not the draft, not the version with tracked changes, not the one someone re-sent with an edited attachment. Disputes about which version governs are common and expensive, and they are entirely avoidable.

Proof that both parties agreed to it. Signatures, or conduct clear enough to stand in for them. If you are relying on an exchange of emails, keep the full chain rather than the useful part.

A record of performance. Delivery notes, timesheets, acceptance emails, payment records. This is what establishes element two, that you did your side.

A record of the failure and of what you said about it. Contemporaneous notes carry weight that later reconstruction never does.

The first two are where electronic signing changes the picture. A signature captured against a document hash, with a timestamp and an audit trail, removes the entire category of argument about what was signed and when. A signature page circulating as a loose PDF does the opposite, and the difference only becomes visible when someone disputes the terms.

If you are drafting rather than enforcing, our guides on how to write a contract and the difference between a contract and an agreement cover the terms worth getting right the first time. For the signature itself, see what a wet signature is and when you still need one.