PA LAW · ARTICLES · COMMERCIAL LAW
Can a Text Message Be a Legally Binding Contract in Australia?
Author: Manal Amro, Principal Solicitor, PA Law Pty Ltd
Last reviewed:
A supplier sends a quote. You reply, “Yes, go ahead.” It takes seconds, but that reply may have consequences beyond confirming that you received the message. For business owners and customers in Gawler, Adelaide and across South Australia, understanding what you are accepting is worth a pause before pressing send.
When is a text message contract legally binding?
The starting point is what the parties agreed, rather than whether they used SMS, email or paper. The Legal Services Commission of South Australia’s contract guidance identifies agreement, intention and consideration as central features.
- Offer and acceptance: did one party put forward a definite proposal and the other communicate agreement to it?
- Intention: do the words and circumstances show a commitment with legal consequences?
- Consideration: is something of value being exchanged, such as services for a promise of payment?
- Certainty: is the bargain sufficiently clear to identify the parties’ obligations?
A request for information or a continuing negotiation is different from accepting an offer. Capacity, authority, legality and transaction-specific formalities may also affect enforceability. A solicitor needs the whole exchange to assess your position.
Could “Yes, go ahead” accept a $4,500 quote?
Illustrative example, expanding on the scenario in PA Law’s video—not a client matter.
A designer emails a Gawler business a quote for a branding package costing $4,500. It identifies the deliverables, completion date and payment stages. The business owner then texts: “Yes, go ahead with that quote.”
That exchange may show acceptance of the quoted work. The absence of a handwritten signature does not, by itself, mean the owner can later treat the arrangement as having no effect.
Now change the reply to: “I’m interested, but please confirm whether the price includes the packaging artwork.” That introduces an unresolved question. Whether the reply is a request for clarification, a counter-offer or acceptance depends on the full wording and context.
Keep these practical distinctions in mind: acknowledging a quote, asking about a quote and accepting a quote are different actions. Use words that accurately reflect what you intend.
7 checks before accepting a quote by text or email
Use this checklist before replying to a supplier, contractor or customer. The government’s guide to preparing a contract also explains why clear scope, payment and performance terms matter.
- Who is contracting? Confirm the legal names and whether you are dealing with a person or company. Check who is authorised to approve the work.
- What is included? Identify the goods, services, quantities and deliverables. Ask about exclusions instead of assuming they are included.
- What is the total price? Check GST, delivery charges, additional work and whether the figure is fixed or an estimate.
- When must payment be made? Confirm deposits, instalments, milestones and the final payment date.
- When must the work be completed? Specify important dates, delivery arrangements and what happens if timing changes.
- What happens if plans change? Read the cancellation, variation and dispute terms before agreeing.
- Which documents are you accepting? Read attachments and linked conditions. Save the relevant quote and terms with your reply.
For example, a café ordering new menu designs might need both print-ready files and editable files. Asking that question before accepting is more useful than discovering a mismatch when the final invoice arrives. A customer booking a service might need to clarify whether rescheduling attracts a fee. These are practical questions to resolve while the arrangement is still being discussed.
How does South Australian law treat electronic agreements?
Section 7 of the Electronic Communications Act 2000 (SA) provides that a transaction is not invalid merely because it occurred wholly or partly through electronic communications. This does not make every message a contract.
Where the Act applies, sections 8 and 9 address legal requirements for writing and signatures. Conditions can include accessibility for later reference, identifying the person, indicating their intention, reliability and consent. Exemptions and other requirements must also be checked.
Distinguish two questions: has a contract been formed? and has a particular legal signing or writing requirement been met? An ordinary agreement may not need a signature at all, while some transactions have formalities that a brief SMS may not satisfy.
Property dealings, consumer credit and certain building contracts need particular care. Do not assume a message is sufficient—or that using a message makes the arrangement unenforceable. For Commonwealth requirements, the Attorney-General’s Department explains electronic signatures, documents and transactions; state and territory laws operate separately.
Already replied? Keep the full conversation
PA Law’s contract dispute guidance recommends keeping complete records and getting advice before terminating an agreement or withholding payment. If your reply is now in dispute:
- Preserve the original message thread, including dates, sender details and surrounding messages.
- Save the quote, attachments, invoices, payment records and relevant versions of any terms.
- Make a short timeline of calls, approvals, work performed and concerns raised.
- Record what outcome you want: clarification, completion, revised terms or an agreed exit.
- Obtain advice before asserting that there is no contract or announcing cancellation.
Screenshots can help, but a cropped reply may omit the very question that explains it. Keep original records and backups where possible. Do not alter messages. If you use disappearing messages for everyday business conversations, consider a more reliable way to retain commercial approvals.
What if you are not ready to accept?
Say so clearly. For example, while still reviewing a proposal you might write:
“Thank you for the quote. I am still reviewing it and am not accepting it or authorising work at this stage. Please clarify the points below.”
This is illustrative wording for a genuine review stage, not a way to undo an agreement already reached. If you want commitment to depend on signing a formal document, obtain advice on how to express and maintain that condition throughout the negotiations.
Frequently asked questions about text message contracts
Is accepting a quote by text legally binding in Australia?
It can be. Whether your reply accepts an offer depends on the quote, any conditions, the surrounding discussion and the applicable legal requirements. A reply should be assessed with the documents it refers to.
Can a contract exist before I pay a deposit?
Yes. A promise to pay can form part of the exchange of value. Whether paying a deposit is a condition of forming the contract depends on the agreed terms.
Can I cancel because I have not signed anything?
Not necessarily. Check whether an agreement already exists and what cancellation rights apply. There is no universal cooling-off period for every contract.
Can emails or WhatsApp messages also form a contract?
They can contribute to an agreement. The communication platform does not replace the need to establish the bargain and satisfy any applicable formalities. Contracts may also combine written messages with verbal discussions or conduct.
Is a formal written contract still worthwhile?
Yes. A clear document can bring the agreed scope, price, dates and responsibilities together. Business.gov.au’s guide to contract types explains the uncertainty that can arise when arrangements are verbal or spread across different records.
Watch PA Law’s short video
Manal Amro explains why a quick acceptance message can matter and what to check before agreeing to a quote.
About the author: Manal Amro is Principal Solicitor of PA Law Pty Ltd, based in Evanston South and assisting clients in Gawler, Adelaide and across South Australia.
General information only, not legal advice. The outcome depends on the communications, documents, circumstances and applicable law. Obtain advice about your own situation before acting.