How contract repudiation works and what to do when it happens

For most small businesses a contract works quietly in the background. It sets out who does what, for what price, and by when. Then something breaks: a supplier stops delivering, a customer says they will never pay, or a counterparty pulls out of a deal that was meant to start next week. In each of these situations the same legal mechanism is engaged, and the law has a name for it: repudiation.

Repudiation is what happens when one party makes clear, in words or conduct, that they will not perform the contract, or will only perform it in a way that is fundamentally different from what was agreed. Understanding how the mechanism operates, what triggers it, the choice it gives the other party, and what each choice produces, is what separates a clean exit with your losses covered from a situation where you become the party in the wrong. This article walks through the mechanism as Australian courts apply it, starting with the conduct that amounts to repudiation, then the election the innocent party faces, the consequences of each path, and the mistakes that turn a valid claim into a wrongful termination. The central authority is the High Court's decision in Koompahtoo Local Aboriginal Land Council v Sanpine Pty Ltd (2007) 233 CLR 115.

What counts as repudiation

The High Court in Koompahtoo stated the test in terms that have been applied ever since. Repudiation is conduct that evinces an unwillingness or an inability to render substantial performance of the contract. The same passage describes it as conduct showing an intention no longer to be bound by the contract, or to fulfil it only in a manner substantially inconsistent with the party's obligations.

The test is objective. The question is not what the defaulting party privately intended, but whether their words and actions would convey to a reasonable person in the other party's position that the contract as a whole, or a fundamental obligation under it, has been renounced. A frustrated remark in a phone call usually will not do it. A pattern of conduct that makes clear performance is not coming, will.

The Court also noted that the word "repudiation" is used in two senses. It can mean renunciation, which is the unwillingness or inability just described. It can also mean any breach serious enough to justify termination by the other party. For a business owner the distinction matters less than the underlying question: has the other side shown they will not perform the contract substantially as agreed, whether through what they said, what they did, or a combination of the two?

Express repudiation

The clearest form is a direct statement. "We are not delivering anything further." "We are not paying." A party who states outright that they will not perform, or will only perform if materially different terms are accepted, has evinced the relevant intention in the most straightforward way. Express repudiation is easier to prove because there is usually a document or a message to point to, but it is still assessed against the same test: the statement must amount to a refusal of substantial performance, not a complaint about the deal or a negotiating position.

Repudiation by conduct

In commercial disputes, repudiation by conduct is more common. Actions that make performance impossible, or that show unwillingness to perform, can amount to repudiation: stopping supply, walking off a site, failing to take the only step that keeps the deal alive, or doing something directly inconsistent with the contract such as selling the contracted goods to someone else. The High Court observed in Koompahtoo that in contractual renunciation, actions may speak louder than words. Because conduct has to be inferred from a course of dealing, the quality of your records often decides how strong the case is.

Repudiation is not the same as a serious breach

Not every breach justifies termination. Where the contract does not spell out termination rights, the common law allows termination for breach of an essential term, which is a condition of the contract, or for a sufficiently serious breach of an intermediate term. Repudiation is a separate and additional ground. The High Court applied these ideas in Koompahtoo itself, where the party managing a joint venture had failed over several years to keep proper accounts, provide development programs and reports, or manage the development, and the Court upheld the other party's termination on the basis that the departures were gross and repeated and went to the root of the contract.

The distinction matters commercially. A late delivery, a minor defect, or an administrative slip-up that can be remedied is a breach, but it is not repudiation, and terminating over it can be a costly mistake. The line is between a problem that can be fixed and a demonstrated intention not to perform the contract as agreed.

Anticipatory repudiation: before performance falls due

Repudiation does not have to wait until the day performance is due. If a party says or does something before that date which shows they will not perform when the time comes, that is anticipatory repudiation, sometimes called anticipatory breach. The innocent party can treat the contract as at an end immediately rather than waiting for the breach to occur. The High Court addressed this in Foran v Wight (1989) 168 CLR 385, which also stands for the accompanying requirement: a party who accepts an anticipatory repudiation must have been ready, willing and able to perform their own side of the contract at the time they accepted it.

The practical value is timing. If a customer emails a week before commencement to say they are pulling out, you do not have to sit and wait. You can accept the repudiation, terminate, claim damages, and redeploy your resources. But if you were not in a position to perform when you accepted, for example because you had already abandoned your own obligations, the claim is compromised.

The election: terminate or affirm

Once the other side repudiates, the innocent party faces a choice between two inconsistent courses: accept the repudiation and terminate the contract, or affirm the contract and hold the other party to it. The law calls this an election, and it is tightly constrained. The High Court in Sargent v ASL Developments Ltd (1974) 131 CLR 634 established that the election must be unequivocal and must be communicated, or at least come to the other party's notice. Once made, it is binding. You cannot terminate and later claim you were affirming, and you cannot keep the contract alive while demanding the remedies that only flow from termination.

Accepting the repudiation and terminating

Acceptance is usually by written notice. You communicate, clearly and in writing, that you treat the contract as at an end because of the other party's repudiation. From that point the contract ends prospectively, and your remedies come into play: damages for the loss of the bargain, recovery of amounts already due, and enforcement of any clauses drafted to survive termination such as confidentiality, restraint, or dispute resolution terms. Because termination is a high-stakes step, the notice itself needs care. A notice that relies on the wrong ground, or that goes out before the contract's own requirements are met, can itself amount to repudiation.

Affirming and keeping the contract on foot

Affirmation keeps the contract alive and binds both parties to it. It suits situations where you still need the outcome, there are no ready alternatives, or you judge the other party will ultimately perform. But it carries risk. You remain obliged to perform your side, you must stay ready, willing and able to do so, and conduct that is only consistent with termination may later be treated as acceptance of the repudiation.

A recent illustration is Taylor Construction Group Pty Ltd v Adcon Structural Group Pty Ltd [2023] NSWSC 723, where a head contractor purported to terminate a subcontract and the subcontractor elected to affirm, expressly stating that it did not accept the repudiation and remained ready, willing and able to perform. When the head contractor reaffirmed its termination, the subcontractor then accepted the repudiation and terminated. The sequence shows that affirming does not permanently forfeit the right to terminate where the repudiation continues or is repeated.

What termination produces

Termination ends the contract going forward. It does not unwind what has already happened. Payment obligations that accrued before termination survive, and damages are available both for past breaches and for the breach constituted by the repudiation itself. The measure is loss of bargain: the position you would have been in had the contract been performed, subject to your duty to mitigate. The High Court in Shevill v Builders Licensing Board (1982) 149 CLR 620 drew the related distinction between terminating under an express power in the contract, where the contract's own remedies apply, and terminating for breach at common law, where damages for loss of bargain are available.

It is also worth checking whether the contract contains a termination for convenience right. If it does, following its notice process can be a cleaner path than relying on repudiation, because you do not need to establish fault at all.

The three ways a business repudiates by accident

The flip side of the mechanism is that the party with the legitimate grievance can become the repudiator. Three patterns recur in disputes between businesses:

• Terminating without a proper basis: telling the other party the contract is terminated when you have neither a contractual right nor a legal ground. An unjustified termination is itself a repudiation, and the other party can accept it and claim damages against you. Before terminating, check what the contract says about termination for cause, termination for convenience, notice periods and cure periods, and whether the breach is serious enough to justify termination at law.

• Suspending performance without a right: stopping supply or services during a payment dispute when the contract has no suspension clause. If the contract is silent, suspending can be treated as repudiation of your own obligations. If the contract does give a right to suspend for non-payment, it needs to be exercised in accordance with its terms. Demanding payment while continuing to perform is usually safer than stopping.

• Making continued performance conditional on new terms: refusing to perform unless the other side accepts materially different terms, such as a new price, scope, exclusivity or delivery timing. Hard negotiation is not repudiation. A demand that the contract be performed only on substantially different terms can be. The safer approach separates enforcing existing rights, such as charging interest the contract allows, from proposing a variation that either side can accept or reject without threatening the original deal.

Consumer contracts: a statutory version of the same idea

Where goods or services are supplied to a consumer, the Australian Consumer Law, which is Schedule 2 of the Competition and Consumer Act 2010 (Cth), builds its own termination mechanism. If a failure to comply with a consumer guarantee is a "major failure", for example where goods are substantially unfit for a purpose for which goods of that kind are commonly supplied and cannot easily be remedied, the consumer may reject the goods and recover compensation, or terminate the contract for services. The definitions sit in ss 260 and 268 of the Australian Consumer Law, and the rights to reject goods or terminate a services contract sit in ss 259 and 267.

The statutory test is not the same as common law repudiation, but the underlying idea is: a failure serious enough that the consumer should not have to keep the deal. Businesses selling to consumers should know that "major failure" is a defined legal test, not a matter of commercial judgment, and that a consumer's termination rights under the Australian Consumer Law cannot be contracted out of.

When a lawyer should be involved

The point where advice pays for itself is before you communicate an election. A lawyer can assess whether the other party's words and conduct meet the test in Koompahtoo, check the contract for termination rights, breach-notice requirements and cure periods, and draft the notice of termination or the affirmation so that it is unequivocal and does not waive rights. On the other side of the table, if you have received a termination notice, a lawyer can assess whether it was valid or itself repudiatory, and whether affirming and continuing is a realistic course. In either position, the cost of a focused review is a fraction of the cost of a wrongful-termination dispute, and advice before the letter goes out preserves options that a hasty letter destroys.

The three questions to answer before you send the letter

The misstep that converts a good claim into a bad one is acting before you can answer three questions about your own position. What exactly did the other party say or do, and why does it meet the test in Koompahtoo? What does the contract require before termination, such as a notice of breach, time to remedy, or a specified process, and have you complied? And if you terminate, can you show you were ready, willing and able to perform your own side? If you cannot answer all three from the documents in front of you, the measured step is to get advice first. The party that moves carefully usually ends up with a valid termination and damages, or a negotiated exit. The party that moves first without checking usually ends up as the defendant.