
Australian contract law is primarily governed by the 'common law', overseen by the courts. However, there is no single piece of legislation governing contract law in Australia, and various statutes impact and supplement it, including the Competition and Consumer Act 2010 (Cth) and the International Arbitration Act 1974 (Cth). The basic principle of Australian contract law is freedom of contract, allowing parties to strike whatever bargain they choose. However, this principle is affected by important legislation and doctrines such as estoppel, good faith, and misleading or deceptive conduct. Australian contract law also addresses discrimination, unfair contracts, and the effect of signatures.
| Characteristics | Values |
|---|---|
| Basis | English common law |
| Governing Law | Common law overseen by courts |
| Basic Principle | Freedom of contract |
| Exceptions | Competition and Consumer Act 2010 (Cth) |
| Contract Formation | Agreement between parties, consideration |
| Contract Interpretation | Plain and ordinary meaning of words, commercial interpretation |
| Signature | L'Estrange Rule |
| Discrimination | Anti-discrimination legislation |
| Unfair Contracts | Commonwealth Independent Contractors Act 2006 |
| Consumer Protection | Australian Consumer Law (ACL) |
| Arbitration | International Arbitration Act 1974 (Cth) |
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What You'll Learn

Contract interpretation
In Australia, contract law is primarily governed by 'common law', with statutes increasingly supplementing common law, especially in consumer protection. The law of equity also plays a significant role in Australian contracts, influencing the remedies available in the event of a breach of a contractual promise.
The 'true rule' in Codelfa, a significant case in this context, states that a contract must be ambiguous for a court to consider external factors. However, subsequent decisions, such as the NSW case of Cherry v Steele-Park [2017], have indicated a departure from this strict requirement. In Cherry v Steele-Park, it was held that the "starting point and ending point" are the words of the contract, but surrounding circumstances can be considered regardless of whether the contract is ambiguous. This approach was also applied in Donau Pty Ltd v ASC AWD Shipbuilder Pty Ltd [2018].
The Victorian and Western Australian courts, however, continue to adhere to the 'ambiguity gateway' approach, as seen in the case of Maggbury Pty Ltd v Hafele Australia Pty Ltd (2001). This disparity in approach across Australia highlights the ongoing controversy surrounding contract interpretation.
Despite these differences, there are some consistent principles applied in contract interpretation. For instance, the interpretation process is generally considered objective, applying the 'reasonable businessperson' test. This test requires considering what a reasonable businessperson would understand the terms of a commercial contract to mean, rather than the subjective intentions of the parties involved. Additionally, the law recognises that a contract can be formed without an identifiable offer and acceptance, provided the parties have shown mutual assent.
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Contract formation
Contract law in Australia is primarily governed by common law, but statutes are increasingly supplementing this. There is no general requirement for contracts to be in writing, and they may be formed orally or by conduct. However, in some cases, legislation may require a written contract.
For a binding contract to exist, there must be an agreement or a meeting of the minds between the parties. This requires an offer and acceptance, although a contract can be made without an identifiable offer and acceptance if the parties have manifested their mutual assent. An offer must be distinguished from a mere 'invitation to treat' or statement of price and can be made in writing, orally, or implied through conduct. Acceptance may also be by conduct, and the court will consider the communications and conduct as a whole to determine when the contract was formed and on what terms.
The second element necessary for contract formation is consideration. A promise will be enforceable as a contract only if it is supported by consideration, which can be anything from money to a promise to undertake or not undertake a particular act. The consideration must be sufficient, but it need not be proven that it forms a proportionate or fair exchange for the promises made under the contract.
The core terms of a contract, such as the identification of the parties, the subject matter, and the price of their agreement, must be agreed upon and expressed in certain terms for the contract to be enforceable. The contract must also be substantially complete and involve an agreement capable of performance.
Australian law requires that the parties to a contract hold an intention to create legal relations. In a commercial context, this is typically presumed, but in a family, social, or domestic context, there is a presumption against intention. If the element of intention is in issue, it will be determined objectively, considering the content of the agreement, the language, and the conduct of the parties.
It is important to note that legislation prohibits misleading and deceptive conduct during contract negotiations. The Australian Consumer Law, which applies to contracts with consumers, prohibits a person in trade or commerce from engaging in conduct that is misleading or deceptive or likely to mislead or deceive.
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Contract termination
In Australia, contract law is primarily governed by 'common law', with statutes increasingly supplementing common law, particularly in consumer protection. The law of contract in Australia is similar to the contract law of other Anglo-American common law jurisdictions, but differences have arisen over time due to statute law and divergent development in the High Court.
- Performance: The most common way is for parties to simply perform their contractual obligations.
- Agreement: Parties may mutually agree to end their contractual obligations.
- Breach: One or both parties may fail to perform important contractual obligations, leading to a breach.
- Frustration: Unpredictable external factors may prevent parties from fulfilling their obligations, allowing them to terminate the contract in limited circumstances.
When a contract is terminated due to breach, repudiation, or other causes, the aggrieved party must decide whether to terminate or affirm the contract. This decision is called 'election', and once made, cannot be reversed. The aggrieved party must be aware of their right to terminate and must demonstrate unequivocal conduct consistent with the performance of the contract.
Commercial contracts typically include circumstances in which either party has the right to terminate. In some cases, there may be an implied obligation to act in 'good faith' when exercising this right. For example, Australian courts have recognised implied terms of good faith and reasonableness, especially in standard form contracts with a general power of termination for breach. However, a clause excluding all implied terms can also be used to exclude the obligation to act in good faith when terminating a contract.
In the context of government contracts, the doctrine of executive necessity gives the government the option to terminate a contract that fetters or purports to fetter statutory executive discretions and powers. This doctrine is based on the rationale that terminating the contract would be in the public interest.
It is important to note that there are no general restrictions on terminating a contract in Australia if the other party is in financial distress. However, there is a restriction on suppliers of essential services (electricity, gas, water, or carriage services) terminating a contract for financial distress.
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Contract disputes
When a contract dispute arises, it is essential to understand what has been agreed upon. This includes having a clear and complete understanding of the final agreement, the parties involved, and any amendments, variations, or related agreements that may impact the original contract. Dispute resolution clauses are influenced by common law principles and statutory requirements, and they outline the steps to be taken when a dispute occurs.
The first step in resolving a contract dispute is to refer to the dispute resolution clause in the contract. This clause should outline the process to be followed, including any time limits and the jurisdiction for legal proceedings. It is important to act promptly and seek specialist advice if needed, as some dispute resolution processes may have strict time limits.
There are several options for resolving contract disputes, including negotiation, mediation, arbitration, and litigation. Negotiation involves both parties coming to a mutual agreement without formal mediation. Mediation involves a neutral third party facilitating discussions, while arbitration results in a binding decision by a third party. Both mediation and arbitration are generally faster and cheaper methods of dispute resolution compared to litigation. If all alternative dispute resolution measures fail, the dispute may need to be taken to court, depending on the jurisdiction and monetary value of the claim.
To protect your rights and efficiently resolve contract disputes, it is crucial to keep comprehensive records, including communications, paperwork, receipts, work logs, and other relevant documents. These records can be crucial for negotiations and may convince a court of the actions undertaken and their reasonableness.
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Consumer protection
In Australia, contract law is primarily governed by 'common law', with statutes increasingly supplementing common law, particularly in consumer protection. The Australian courts' view is that contract law arose from the actions of assumpsit and the concepts of motive and reliance. The law of equity also plays a significant role in Australian contracts, influencing the remedies available when contractual promises are breached.
The ACL covers areas such as consumer guarantees, unfair contract terms, unconscionable conduct, and manufacturers' liability. It also addresses misleading or deceptive conduct, including the privacy and use of consumers' online personal information. The ACCC website provides guides and summaries of the law to help consumers and businesses understand their rights and obligations.
In addition to the ACL, other laws also protect consumers in Australia. For example, the Fair Work Act 2009, which primarily applies to employers and employees, also offers protections to contractors from hirers who discriminate based on union membership or previous unfair contract claims. Anti-discrimination laws also apply to contracts, prohibiting bullying, harassment, or discrimination during the performance of a contract.
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Frequently asked questions
The basic principle of Australian contract law is freedom of contract, which means that parties are free to strike whatever bargain they choose. However, there are limitations to this broad principle.
There are five essential elements for a legally binding contract in Australia: an agreement between the parties, consideration, offer and acceptance (although this is not always necessary), mutual assent, and the intention to be bound by the contract.
Australia is a signatory to the Vienna Convention on Contracts for the International Sale of Goods, which provides a framework for the formation and performance of international sales contracts. If the parties agree, they can choose to be governed by their own national laws instead of the Convention.
Contractors in Australia are protected by the Commonwealth Independent Contractors Act 2006, which overrides state and territory legislation. They are also protected by the Fair Work Act 2009, which includes protections against discrimination and unfair contract claims.















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