Masters v Cameron: What 'Subject to Contract' Means

When you’re negotiating a deal - a supply agreement, a business purchase, or a new lease - it’s common to jot down the main terms and say the deal is “subject to contract” or “subject to execution of a formal agreement”.

But will a court say you’ve already made a binding contract, or are you still free to walk away until a formal document is signed?

In Australia, the leading case on this is Masters v Cameron. It’s a staple of contract law, and it still guides how courts decide whether preliminary agreements are binding. For small business owners, understanding this case can help you manage risk, negotiate confidently, and avoid expensive disputes.

In this guide, we’ll unpack the key principles from Masters v Cameron in plain English, show how they apply to everyday commercial negotiations, and share practical steps to draft safe “subject to contract” wording from the outset.

What Is Masters v Cameron? A Plain-English Summary

Masters v Cameron (1954) is a High Court of Australia decision about whether an agreement noted “subject to contract” was binding. The parties had agreed on the essential terms of a land sale, but intended to draw up a formal contract later. When one party tried to back out, the dispute was whether they were already bound.

The Court held that not all agreements “subject to contract” are the same. Sometimes the parties intend to be immediately bound (even before signing the formal document). Other times, they don’t want to be bound until the formal contract is executed. The key is the parties’ intention - what a reasonable person would understand from the words used and the context.

To make sense of this, the Court set out three categories (a fourth was later recognised by Australian courts). These categories are now the go-to framework to test whether a deal is binding or not.

The Four Masters v Cameron Categories (With Business Examples)

Courts now often refer to four categories when dealing with “subject to contract” arrangements. Here’s what they mean - and how they show up in real business life.

Category 1: Binding Now, Formalities Later

The parties have agreed on all essential terms and intend to be bound immediately. The formal document is just a tidy write-up of the deal. If the document never gets signed, the deal still stands.

Example: You and a key supplier agree on product specifications, pricing, minimum order quantities, delivery and term. You both say “we’ve got a deal - we’ll draft a formal agreement next week.” If one side later refuses to sign, a court may still enforce the agreed terms as a contract.

Category 2: Bound Now, But Performance Waits For Formal Contract

The parties intend to be bound right away, but agree they won’t start performing until the formal contract is executed. You can’t back out of the commitment, but you don’t have to start delivery or payment until the final document is signed.

Example: You agree in principle to buy a business, with all key terms set (price, assets, completion conditions), but you both agree that none of you needs to start transferring assets until the long-form contract is signed. The promise to sign is binding; the performance is deferred.

Category 3: No Binding Deal Until Formal Contract

The parties do not intend to be bound until a formal contract is executed. You’re free to walk away until then. This is what many people try to achieve with “subject to contract” wording - but courts look closely at the exact words and conduct to confirm it.

Example: You sign a brief “offer sheet” for a commercial lease that says “subject to execution of a formal lease in a form satisfactory to the landlord and tenant.” If negotiations later break down and no lease is signed, there’s likely no binding lease.

Category 4 (Later Recognised): Agreement On Essential Terms, But Open To Further Negotiation

Sometimes, parties agree on the essentials but contemplate further negotiation on other terms. They may be bound on the essentials, with the remaining terms to be finalized in good faith later. This category is fact-specific and can be risky.

Example: You agree the price and scope with a software vendor but leave service levels and support fees “to be agreed”. Depending on the wording and context, a court may find the agreement too incomplete to enforce, or it may imply reasonable terms. Leaving key terms open increases uncertainty.

How Do Courts Decide Which Category Applies?

Courts look at the words used, the surrounding context, and the conduct of the parties. There’s no magic phrase - it’s about the overall intention.

• Clear “subject to contract” wording supports Category 3 (not bound until formal contract), but it’s not conclusive if conduct suggests otherwise.
• Starting to perform (e.g. delivering goods, paying deposits, handing over keys) often points to Category 1 or 2.
• Leaving key terms unresolved suggests the parties did not intend to be bound yet.
• Emails and messages can form binding agreements if they contain clear acceptance of essential terms - yes, Email Agreements can be binding in Australia.

Practically, this means you should be deliberate with your words and your actions during negotiations. If you want to avoid being bound until signature, make that crystal clear and behave consistently with that intention (e.g. don’t start performance early).

Negotiating Safely: Practical Drafting Tips For “Subject To Contract”

Whether you use a term sheet, heads of agreement, or letter of intent, a few drafting habits go a long way to control your legal risk.

Use A Clear Conditional Binding Clause

Say something like: “The parties do not intend to be legally bound unless and until they execute a formal written agreement.” This points strongly to Category 3.

Separate Binding And Non-Binding Clauses

It’s common to make certain clauses binding even before the final contract is signed - like confidentiality, costs, exclusivity (no shop), and governing law. Label these clauses “Binding Clauses” and state that everything else is non-binding until signature.

Avoid Partial Performance Before Signature

Starting work, paying deposits, shipping goods, or granting access can undermine your “non-binding” position. If you must start, document that it’s at-risk and not acceptance of any binding agreement.

Be Specific About What’s Outstanding

List the key terms still to be negotiated (for example, warranties, limitations of liability, service levels, or payment milestones). The more that’s unresolved, the safer your “non-binding” intention generally is - but keep in mind commercial momentum can stall if too much is left open.

Choose The Right Document For The Job

For early-stage deal scoping, a Heads of Agreement or a Memorandum of Understanding can capture key terms and set expectations while making the binding status clear. When you’re ready, transition to the long-form contract promptly and ensure it’s executed correctly.

Common Small Business Scenarios (And How Masters v Cameron Applies)

Buying Or Selling A Business

Term sheets in business sales often state the deal is “subject to contract, due diligence and finance approval”. If the buyer later discovers an issue and walks away before signing, a clear Category 3 clause helps avoid claims the parties were already bound to complete the sale.

Tip: If you agree to exclusivity while you finalise the formal documents, ensure exclusivity is a clearly labelled binding clause. Keep everything else non-binding until the business sale agreement is executed.

New Supplier Or Distribution Deal

A back-and-forth on price, territory and minimums may culminate in “we’re agreed on the essentials - let’s get a contract drafted.” If you start shipping immediately, a court might find you intended to be bound (Category 1 or 2). If your strategy is to stay unbound until a full agreement - especially to finalise liability caps, IP and termination - hold off on performance and use explicit Category 3 wording.

Commercial Lease Negotiations

Heads of agreement for a lease should say clearly whether they are binding. Landlords often want key commercial terms binding early; tenants often prefer non-binding until the lease is executed. Label binding vs non-binding clauses carefully to avoid misunderstandings.

Joint Ventures, Partnerships Or Collabs

Early enthusiasm can lead to “handshake” terms. But roles, IP ownership, revenue share and exit terms are often unresolved. Without disciplined drafting, you might unintentionally land in a Category 1/2 scenario. Use a properly drafted heads of agreement with a non-binding clause and move to the formal joint venture or collaboration agreement before you launch.

Forming A Contract: Keep The Building Blocks In Mind

Even before Masters v Cameron, Australian law asks a simpler question: did the parties form a contract at all? That turns on offer, acceptance, consideration and intention to create legal relations. Keeping these basics in mind helps you recognise when you might be crossing the line from negotiation to contract.

For a refresher on the fundamentals, see Offer and Acceptance. Remember: a clear offer, an unqualified acceptance and agreement on essential terms - even over email - can be enough to bind you unless you’ve made your “subject to contract” position explicit and consistent.

From Term Sheet To Signed Contract: Do The Handover Properly

Once the key terms are settled, it’s time to move to the long-form agreement. This is where you lock in risk allocation (warranties, indemnities, limitations of liability), payment mechanics, termination rights and dispute resolution.

• If your initial document was non-binding, ensure the long-form agreement properly replaces it.
• If your initial document was partly binding (e.g., confidentiality, exclusivity), decide if those clauses should carry over or end on signature.
• If you tweak agreed terms during drafting, make the changes explicit so no one claims “that’s not what we agreed”.

If you need to adjust terms post-signature, do it in writing using clear, tracked changes or a formal variation document. A short primer on how to approach this is in Contract Amendments and how to Vary a Contract correctly.

Finally, make sure the contract is signed in a legally effective way. For companies, that often means following the Corporations Act execution rules. Our guide to Section 127 explains how company signings can be done so they’re enforceable.

Emails, Quotes And Verbal Agreements: Hidden Traps During Negotiation

Most deals evolve through emails and messages before anyone drafts a formal contract. That’s where unintentional binding agreements often arise.

• Be cautious with language like “we agree” or “confirmed” in emails that list all the essentials - it can look like acceptance.
• If you intend to stay non-binding, repeat it: “This email is not intended to create a binding agreement. Any contract will only arise on execution of a formal agreement.”
• Quotes, proposals and acceptance emails can also be evidence of a binding contract if they include the essentials and are accepted. Keep your conditions clear from the start.

Drafting Your Heads Of Agreement Or LOI: Key Clauses To Include

If you’re using a short-form document before the final contract, these components help you control your Masters v Cameron risk and keep negotiations on track:

• Purpose and Parties: Identify who’s negotiating and the transaction in scope.
• Key Commercial Terms: Price, scope, deliverables/assets, timing, completion conditions - capture only the essentials.
• Status Clause: A clear statement that the document (except specified clauses) is not legally binding until a formal agreement is executed.
• Binding Clauses: Clearly label confidentiality, exclusivity/no shop, costs and governing law as binding if you need them to be.
• Conditions Precedent: Any approvals, finance or due diligence that must be satisfied before signing.
• Sunset Date: A target date by which you expect to sign the formal agreement (helps maintain momentum and avoid drifting deals).
• Dispute Handling: A simple pathway (discussion, escalation) if issues arise while you finalise the long-form document.

Using a well-drafted Heads of Agreement can reduce misunderstandings and ensure everyone knows where they stand while you finalise the contract.

Practical Checklist: Staying On The Right Side Of Masters v Cameron

• Decide early whether you want to be bound now or only on signature.
• Use explicit non-binding wording if that’s your intention, and label any binding clauses.
• Avoid starting performance before signature if you want to preserve a Category 3 position.
• Keep a clean paper trail (emails, term sheets) that consistently signals your intention.
• Move promptly from term sheet to long-form contract and sign properly (consider the Section 127 rules for companies).
• If you must change terms after signature, use a clear written variation - see the basics of Contract Amendments and how to Vary a Contract.

Key Takeaways

• Masters v Cameron sets out four categories that determine whether a “subject to contract” agreement is binding now or only on signature.
• Your wording and your conduct both matter - if you want no binding deal until signature, state it clearly and avoid early performance.
• Use short-form documents like a Heads of Agreement or Memorandum of Understanding with explicit status clauses and clearly labelled binding vs non-binding terms.
• Remember the contract building blocks: offer, acceptance and intention; emails and quotes can form binding contracts if the essentials are agreed.
• Move quickly from term sheet to a properly executed long-form contract, and handle any changes through clear written variations.
• Getting tailored legal input early can prevent costly disputes about whether a deal is already binding.

If you’d like a consultation about drafting heads of agreement, “subject to contract” clauses or finalising your commercial contracts, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.