Acceptance is one of the core elements in forming a legally binding contract under Australian law. If the acceptance of an offer is unclear or not properly communicated, the contract may be unenforceable – leading to unnecessary legal risks for individuals and businesses.
This article, written by our contract lawyer, explains the legal requirements for acceptance under Australian law. We discuss common pitfalls and offer practical guidance for Australian businesses and individuals.
Key Takeaways
Here are the main points to know about acceptance in Australian contract law:
- Acceptance is a clear and unequivocal agreement to the terms of an offer
- It must be communicated to the offeror, unless waived or in cases of unilateral contracts
- Acceptance must mirror the offer; any changes may constitute a counteroffer
- Methods of acceptance can be specified by the offeror or implied by conduct
- Silence does not generally amount to acceptance under Australian law
What is Acceptance in Contract Law?
In contract law, acceptance is the final and unqualified expression of agreement to the terms of an offer.
Once acceptance occurs (along with consideration, intention, and capacity) a binding contract is formed.
For acceptance to be legally valid under Australian contract law, it must:
Be unambiguous and correspond exactly with the terms of the offer (mirror image rule)
Be clearly communicated to the offeror
Be made while the offer is still open (i.e. not revoked, expired, or rejected)
Use the method of acceptance specified in the offer (if applicable)
How Must Acceptance Be Communicated?
Communication is a key element in the acceptance process:
- Acceptance must be communicated to the offeror to be effective
- In some cases, acceptance is effective upon posting (mailing) rather than receipt, unless otherwise stated by the offeror
- Under the Electronic Transactions Act 1999 (Cth), acceptance by email or electronic means is effective when received by the offeror
- In cases where acceptance is by performance (for example, reward offers), communication may not be required until the act is completed
The general rule in Australia is that silence does not constitute acceptance, unless there is a prior course of dealing or express agreement to that effect.
Acceptance by Conduct: In some cases, acceptance can be implied through conduct. For example, if a party begins performing the terms of the offer (e.g. delivering goods or starting work), this may constitute valid acceptance.
If you’re unsure where to start when formalising an agreement, check out our step-by-step guide on how to write a legally binding contract in Australia.
Counter-Offers and Conditional Acceptance
If the offeree changes the terms of the original offer (such as the price, delivery method, or payment terms) this is not acceptance. Instead, it is a counter-offer, which cancels the original offer and puts new terms on the table.
Example:
A service provider offers to perform work for $5,000 and requests written confirmation. The client replies agreeing to the work but proposes a $4,500 fee. This is a counter-offer. The provider must accept those new terms before a binding contract is formed.
Learn more in our article on How to vary a contract legally in Australia
Practical Tips for Contract Acceptance
- It is better for a contract to be accepted in writing – trying to prove that someone accepted an offer verbally is difficult
- If you don’t want to hold an offer open for an unlimited time, make sure you put a clearly set deadline on acceptance of the offer
- Use precise wording and avoid vague responses
- Watch out for any return comments that appear to change the terms of the original offer, as this may not be acceptance but a counteroffer
- Specify your preferred method of communication of acceptance (e.g. by email) for clarity and record-keeping
Many people wonder whether deals made over the phone or SMS are enforceable – read more about whether text messages count as a contract under Australian law.
Real-Life Example: Acceptance in Action
Imagine a Sydney-based marketing agency sends a written offer to a client proposing a 3-month social media campaign for $6,000. The offer states that acceptance must be made by email no later than 5:00pm Friday.
The client replies on Thursday via email, writing:
“We’re happy to proceed with the campaign on the terms outlined. Please consider this email confirmation.”
In this case, acceptance is clear, unambiguous, timely, and follows the specified method (email). A legally binding contract is formed the moment the agency receives the email, without needing further confirmation or signatures.
Had the client replied after the deadline or tried to negotiate the price or other terms, that response would be considered a counter-offer, not acceptance.
Frequently Asked Questions
What happens if acceptance is not communicated?
Generally, a contract is not formed unless acceptance is communicated to the offeror. Exceptions apply for unilateral contracts or where communication is expressly waived.
Can acceptance be implied by conduct?
Yes, acceptance can be implied by conduct if the offeree’s actions clearly indicate agreement to the offer’s terms (e.g. commencing performance of promised work).
Does silence ever amount to acceptance?
Silence does not usually amount to acceptance in Australia, unless there is a prior agreement or established course of dealing between the parties.
Is verbal acceptance enforceable?
Verbal contracts can be enforceable in Australia, but proving them is harder. Written acceptance is strongly recommended.
What if acceptance is sent after the offer has expired?
If acceptance is sent after the offer has lapsed or expired, it is treated as a counteroffer, which the original offeror may accept or reject.
Is electronic acceptance valid under Australian law?
Yes, electronic acceptance (such as by email) is valid under Australian law. However, it must meet the requirements of the Electronic Transactions Act 1999 (Cth) and any conditions specified by the offeror.
A poorly worded acceptance or unclear communication can cost your business time, money, and trust. Let our experienced Australian contract lawyers help you.
