Insight · Contracts

What Is Repudiation of a Contract?

Published 22 July 2026

A plain-English guide to how Australian courts test repudiation — and how the innocent party should respond without stepping on their own case.

Repudiation of a contract is conduct by one party that shows — objectively — they no longer intend to be bound by the agreement, or intend to perform it only in a way substantially inconsistent with what was promised. In Australia, repudiation is one of the two main grounds a party can rely on to terminate a contract at common law.

The legal test

The leading Australian authority is Koompahtoo Local Aboriginal Land Council v Sanpine Pty Ltd (2007) 233 CLR 115. The High Court described repudiation as conduct that either (a) evinces an unwillingness or inability to render substantial performance, or (b) shows an intention to fulfil the contract only in a manner substantially inconsistent with the party's obligations.

The test is objective. What matters is not the repudiating party's private state of mind — it is what a reasonable person in the innocent party's position would conclude from the words and conduct.

Common examples of repudiation

A supplier writes to say they "will not be delivering under this contract" — a clear anticipatory repudiation.
A buyer refuses to pay unless the seller agrees to renegotiate price or scope not agreed in the contract.
A party insists on a construction of the contract that would fundamentally alter the bargain (e.g. treating a fixed-price contract as cost-plus).
A party makes it impossible to perform — for example, selling the specific asset that was the subject of the contract to a third party.
Persistent, serious non-performance that shows the party is unwilling or unable to meet its obligations.

Repudiation vs breach of an essential term

Australian law recognises three grounds for termination at common law: breach of a condition (essential term), sufficiently serious breach of an intermediate term, and repudiation. They overlap but are distinct. Whether a term is "essential" is a matter of construction; repudiation looks instead at the party's overall conduct and intent.

In practice, innocent parties often plead both — arguing that the same conduct amounts to breach of an essential term and repudiation — to preserve their right to terminate if one basis fails at trial.

The election: accept or affirm

Repudiation does not automatically end the contract. The innocent party must elect. There are two options:

Accept the repudiation. The contract is terminated from the date of acceptance. Accrued rights survive. The innocent party can sue for loss of bargain damages — the position they would have been in if the contract had been performed.
Affirm the contract. The contract remains on foot. Both parties remain bound. The innocent party can still sue for damages for any actual breach, but cannot later change position and terminate for the same conduct.

The election is usually irrevocable. Delay, continued performance, or acceptance of further performance from the other side can all be treated as affirmation.

How to accept a repudiation properly

Acceptance should be communicated clearly and unequivocally in writing. A good termination notice will:

Identify the contract.
Set out the conduct relied on as repudiation.
State that the conduct is accepted as repudiation.
State that the contract is terminated with immediate effect (or from a specified date).
Reserve rights to claim damages and any other remedies.

Getting this wrong is expensive. Wrongful termination is itself a repudiation, and the party who terminated first can end up as the defendant in a damages claim. If the conduct is borderline, take advice before firing the notice.

Damages for repudiation

The measure of damages for accepted repudiation is generally loss of bargain — the value of the performance the innocent party would have received, less what it costs them to obtain substitute performance (mitigation applies). In commercial contracts this can include lost profit, wasted expenditure, and the cost of replacement suppliers or customers.

Practical takeaways

Before treating conduct as repudiation, ask whether a reasonable person would objectively conclude the other side has renounced the contract.
Do not affirm by mistake — stop calling for performance the moment you decide to terminate.
Get the termination notice in writing, and get advice on its wording.
Preserve evidence of the repudiating conduct (emails, meeting notes, invoices, delivery records).

Where this fits in a broader contracts strategy

Repudiation risk is one of the reasons we spend real time on the termination, dispute and notice clauses in every contract we draft. A well-drafted contract will define what constitutes a material breach, set out cure periods, and prescribe the manner of termination — reducing the ambiguity that turns a straightforward exit into a repudiation dispute. See our Business Contracts service page for how we approach this.

Frequently asked questions

What is repudiation of a contract in simple terms?

Repudiation is conduct by one party that shows they no longer intend to perform the contract, or that they intend to perform it only in a way substantially inconsistent with their obligations. The innocent party can then choose to accept the repudiation and terminate, or affirm the contract and require performance.

Is repudiation the same as breach?

No. Every repudiation involves a breach (or an anticipated breach), but not every breach amounts to repudiation. Repudiation requires conduct evincing an intention not to be bound, or an inability to perform in a fundamental way.

What is the test for repudiation in Australia?

The High Court in Koompahtoo Local Aboriginal Land Council v Sanpine (2007) confirmed that repudiation is judged objectively — would a reasonable person in the shoes of the innocent party conclude that the other party no longer intended to be bound, or intended to perform only in a manner substantially inconsistent with the contract?

What are my options if the other party repudiates?

You can (a) accept the repudiation, terminate the contract and sue for damages, or (b) affirm the contract, keep it on foot, and continue to require performance. The election is usually final — once made, it is difficult to reverse.

How long do I have to accept a repudiation?

There is no fixed statutory period, but delay can be treated as affirmation. You should communicate your election clearly and promptly in writing, ideally after taking legal advice on whether the conduct actually meets the repudiation threshold.

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