U1.05 - Key Elements of a Contract
Overview
Dotpoint 5: Key Elements of a Contract
A contract is a legally enforceable agreement between two or more parties.
In business, contracts are everywhere - including employment agreements, supplier contracts, leases, franchise agreements and sales transactions.
For a contract to be legally binding in Australia, three key elements must exist:
- Intention
- Agreement - offer and acceptance
- Consideration
If one of these elements is missing, the contract may not be legally enforceable.
🎯Intention
Intention means that both parties intend for the agreement to create legal consequences and be legally binding.
Intention to create legal relations
What it means
For a contract to be legally binding, the parties must intend that the agreement can be enforced by law if one side does not do what they promised.
In business and commercial situations, this intention is usually assumed because the parties are making an agreement as part of a business transaction.
For example, if a supplier agrees to sell 500 units to a retailer for an agreed price, both sides would normally expect the agreement to be legally binding.
In social or domestic situations, legal intention is usually not assumed because the arrangement is often informal and based on personal trust.
For example, if one friend promises to drive another friend to the airport, this would usually not be treated as a legally enforceable contract.
Simple way to remember it:
Business agreement → usually intended to be legally binding
Social agreement → usually not intended to be legally binding
✔ A West Perth accounting firm signs a contract to provide tax services to a mining company. This is a commercial agreement, so legal intention is clearly present.
✔ A Joondalup café signs a three-year lease for shop space in Lakeside Shopping Centre. Both parties intend the agreement to have legal consequences.
✘ Two friends agree to “pay each other back for dinner sometime.” This is a social arrangement and legal intention is not normally assumed.
Why intention matters in business
Businesses rely on intention so that commercial agreements can be enforced. Clear legal intention allows a business to:
- enforce payment obligations
- recover losses where another party breaches the agreement
- protect money, time and other investments
- hold employees, suppliers or other contracting parties accountable.
Without legal intention, an agreement may not be enforceable in court.
Example of how to write this in an exam
Intention means that the parties intend their agreement to create legal consequences. In a commercial situation, this intention is usually assumed. For example, if a café signs a three-year lease with a shopping centre, both parties expect the agreement to be legally binding. This allows either party to enforce the agreed terms if the other party fails to perform, giving the business greater certainty and protection.
🤝Agreement - Offer and Acceptance
Agreement requires a clear offer by one party and a clear acceptance of that exact offer by the other party.
Agreement: offer and acceptance
Offer
An offer is a clear and definite proposal made by one party to another, showing that they are willing to be legally bound if the other party accepts.
An offer should contain clear terms, such as:
- what is being provided
- the price
- any important conditions
- when the work or product will be supplied.
Example: A landscaping business in Midland provides a written quote stating: “Supply and install fencing for $8,500.” This is an offer because the terms are clear and the business is showing it is willing to proceed on those terms.
Acceptance occurs when the other party agrees to the offer without changing its terms.
For example, if the client replies, “Yes, we accept the $8,500 quote,” the offer has been accepted.
Once a valid offer is accepted, this can help form a legally binding contract, provided the other required elements of a contract are also present.
Counter-offers change the agreement
Acceptance must match the offer exactly.
If the other party tries to change the price, quantity, timing or another important term, the response is a counter-offer, not acceptance.
A counter-offer effectively proposes a new agreement, which the original party can accept or reject.
For example, if the client responds to the $8,500 fencing quote by saying, “Will you do it for $7,500?”, the original offer has not been accepted. Instead, the client has made a new offer of $7,500.
Simple way to remember it:
Offer + exact acceptance = agreement
Offer + changed terms = counter-offer
Example of how to write this in an exam
Agreement requires a clear offer and acceptance of that exact offer. For example, a landscaping business may offer to install fencing for $8,500. If the customer accepts the $8,500 quote, agreement exists. However, if the customer asks for the work to be completed for $7,500, this changes the terms and becomes a counter-offer rather than acceptance. Therefore, a binding agreement is not formed until both parties agree to the same terms.
💸Consideration
Consideration is something of value exchanged between the parties to a contract. Both sides must give something.
Consideration - exchange of value
What can count as consideration?
Consideration is something of value that each party gives, promises to give, or agrees to do as part of the contract.
It commonly includes:
- money
- goods
- services
- labour
- a promise to do something.
The key idea is that there must be an exchange of value between the parties.
For example, a customer agrees to pay $800 for a mechanic to service and repair their car. The customer’s consideration is the $800 payment, while the mechanic’s consideration is the repair service.
✔ A Subiaco retail store hires a Year 12 student. The employee provides labour and the employer provides wages.
✔ A Perth web designer builds a website for a Fremantle café for $3,000. The designer gives services and the café gives payment.
✔ A mining services contractor provides equipment hire in exchange for payment from a WA resources company.
If one party gives nothing, there is no exchange of value and the agreement may not form a valid contract.
Why consideration matters in business
Consideration identifies what each party is required to give under the agreement. This makes the commercial exchange clear and helps the parties understand what performance is expected from each side.
Example of how to write this in an exam
Consideration is something of value exchanged between the parties. For example, where a retail store hires a Year 12 student, the employee provides labour while the employer provides wages. Both parties therefore give something of value. Consideration is important because it identifies the exchange underlying the agreement and helps show that the arrangement is more than a one-sided promise.
🇦🇺Real WA Business Scenarios
Putting the three elements together
Employment contract
A Scarborough hospitality venue hires a barista.
Intention → both parties intend legal employment.
Agreement → the job offer is accepted.
Consideration → wages are exchanged for labour.
All three elements are present, so a valid contract is formed.
A Bunbury café agrees to buy coffee beans monthly from a Perth supplier.
Intention → both businesses intend a commercial arrangement.
Agreement → a written offer is accepted by email.
Consideration → payment is exchanged for goods.
All three elements are present.
Construction example
A Perth homeowner agrees to pay a builder $20,000 to build a new patio.
Intention → both parties intend the building agreement to be legally binding.
Agreement → the builder offers to complete the patio for $20,000 and the homeowner accepts.
Consideration → the homeowner provides payment and the builder provides the construction service.
All three elements are present.
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🃏 Flashcards
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🎮 Revision Games
💰 BME Millionaire
Climb the ladder by mastering intention, agreement and consideration.
📝 Build the Contract
Identify the missing contract element and repair each business deal.
⚡ 60 Second Showdown
Rapid-fire questions on offers, acceptance, intention and consideration.

Biz Fact: A tradie quote becomes binding when it is accepted, even by text - that “Yep, go ahead” can lock in a deal if the price and scope are clear.