Insight · Disputes
Rescission of a Contract
Published 25 August 2026
When a contract can be unwound from the beginning, and what stops the remedy once performance has started.
In short
Rescission is an equitable remedy that sets a contract aside from the beginning and restores the parties to their pre-contractual positions. It is available for vitiating factors affecting formation — misrepresentation, mistake, duress, undue influence, unconscionable conduct — and requires substantial restoration of what each party received.
Rescission and termination are often used interchangeably in correspondence. They are different remedies with different consequences, and choosing the wrong one can be fatal to a claim.
Rescission vs termination
Termination operates prospectively. The contract existed, obligations accrued, and future performance ends — typically after breach of an essential term or repudiation. Accrued rights survive, and damages are assessed on loss of bargain.
Rescission operates retrospectively. The contract is treated as never having bound the parties. There is no loss of bargain claim, because there was no enforceable bargain to lose. Instead the court restores value: money back, property back, accounts adjusted.
The practical consequence: if the complaint is about how the other side performed, you are in termination territory. If the complaint is about how you were induced to enter the contract, rescission is the remedy to consider.
Grounds for rescission
- Misrepresentation — a false statement of fact that induced entry. Fraudulent and innocent misrepresentation are treated differently, but both can support rescission.
- Mistake — common mistake as to a fundamental assumption, or unilateral mistake known to and taken advantage of by the other party.
- Duress — illegitimate pressure, including economic duress in commercial dealings.
- Undue influence — actual or presumed, arising out of a relationship of ascendancy.
- Unconscionable conduct — exploitation of a special disadvantage, in equity and under ss 20–22 of the Australian Consumer Law.
- Non-disclosure — where a duty to disclose arises, including in insurance and some franchising and property contexts.
Statute also supplies rescission-like rights: the Australian Consumer Law for misleading or deceptive conduct under s 18, cooling-off rights in various state legislation, and disclosure regimes in franchising.
Restitutio in integrum — the practical barrier
Equity will not rescind unless the parties can be substantially restored. Perfect restoration is not required — courts can order allowances and accounts — but there must be a workable path back. This is why rescission gets harder as performance progresses: goods are consumed, services are delivered, businesses are integrated.
What bars rescission
- Affirmation — continuing with the contract after learning of the ground, expressly or by conduct.
- Delay — laches. Equity assists the vigilant; an unexplained delay after discovery undermines the claim.
- Third-party rights — where an innocent third party has acquired an interest for value.
- Impossibility of restoration — where the subject matter has been substantially altered, consumed or on-sold.
- Contractual limitation — entire agreement clauses and reliance disclaimers can narrow misrepresentation claims, though they cannot exclude liability under s 18 of the Australian Consumer Law.
How rescission is effected
Where the ground is clear, rescission can be effected by clear and unequivocal notice to the other party, coupled with an offer to restore what was received. In contested matters, parties usually seek a court order so that restitution and third-party interests can be dealt with in one go.
The risk is symmetrical with wrongful termination: if you purport to rescind and the ground is not established, you have repudiated the contract and exposed yourself to a damages claim. Take advice before serving the notice, not after.
What we do on these matters
We assess whether the facts support rescission, termination, a damages claim under s 18, or a combination; draft the notice; and run the pre-litigation strategy. Where a matter needs a hearing we brief specialist counsel. See our commercial disputes work and our note on the limitation periods that quietly kill these claims.
Frequently asked questions
What does rescission of a contract mean?
Rescission sets a contract aside as if it had never been made, and the parties are restored to their pre-contractual positions. It is different from termination, which ends future obligations but leaves the contract — and accrued rights — intact.
What are the grounds for rescission in Australia?
The recognised vitiating factors are misrepresentation, mistake, duress, undue influence, unconscionable conduct, and non-disclosure where a duty to disclose exists. Statutory rescission rights also arise under the Australian Consumer Law and in some property transactions.
What is the difference between rescission and termination?
Termination is a contractual or common law right that ends performance going forward — usually after repudiation or breach of an essential term. Rescission is an equitable remedy attacking the formation of the contract itself, and it requires substantial restoration of what each party received.
Can I rescind a contract after I have started performing it?
It becomes harder. Rescission requires restitutio in integrum — practical restoration of the parties' positions. Delay, affirmation of the contract after learning of the ground, or third-party rights acquired in the meantime can all bar the remedy.
Do I have to sue to rescind a contract?
Not necessarily. Rescission can be effected by clear notice to the other party where the ground is established, though a court order is often sought to resolve dispute and to deal with restitution. Get advice before serving notice — a wrongful rescission is itself a repudiation.
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