How Contract Law Operates in Australia

Overview

This guide explains the fundamental principles of how contract law works in Australia — from the formation of a contract through to performance, breach, and remedies. Whether you are a legal professional, business owner, or student, understanding how contracts are formed and enforced is essential for navigating Australian commercial law.

Step 1: Offer

A contract begins with an offer — a clear, definite proposal made by one party (the offeror) to another (the offeree) with the intention that it will become binding once accepted. An offer is distinguished from an invitation to treat, which is merely an invitation to make an offer (such as goods displayed in a shop window).

Step 2: Acceptance

Acceptance must be a clear, unqualified agreement to all the terms of the offer. It must be communicated to the offeror (except in unilateral contracts, where performance constitutes acceptance — see Carlill v Carbolic Smoke Ball Co). A counter-offer destroys the original offer.

Step 3: Consideration

Each party must provide consideration — something of value exchanged for the other party's promise. Consideration must be sufficient (of some recognisable value) but need not be adequate (of equal value).

Step 4: Intention to Create Legal Relations

The parties must intend that their agreement will be legally binding. In commercial agreements, this is presumed. In social and domestic agreements, the presumption is that the parties do not intend legal relations, unless evidence shows otherwise.

Step 5: Capacity

The parties must have the legal capacity to enter into a contract. Minors, persons with mental impairment, and intoxicated persons may lack capacity in certain circumstances.

Step 6: Performance and Breach

Once formed, parties must perform their contractual obligations. A breach occurs when a party fails to perform. The innocent party may be entitled to damages, specific performance, or termination depending on the nature and severity of the breach.

Examples

• • A signed employment agreement is a bilateral contract — both employer and employee exchange promises (work for wages)
• • An online purchase involves offer (adding to cart and submitting order), acceptance (merchant confirmation), and consideration (payment for goods)

Practical Use

Understanding contract formation is critical for businesses negotiating commercial agreements, lawyers drafting contracts, and individuals entering into significant transactions such as property purchases or employment agreements.

Common Pitfalls

• • Assuming that all negotiations create binding contracts — many discussions are invitations to treat, not offers
• • Failing to document agreed terms in writing, making enforcement difficult
• • Confusing a counter-offer with a request for information — a counter-offer terminates the original offer
• • Overlooking implied terms from statute or custom that may affect the contract