What are the 6 rules of a contract?

The 6 Essential Elements of a Valid Contract

Not every agreement qualifies as a legally binding contract. For a contract to hold up in court, it must meet six fundamental requirements. These elements ensure that all parties enter the agreement freely, fairly, and with a clear understanding of their obligations.

Every contract starts with an offer—a clear proposal made by one party to another. Whether it’s a promise to deliver goods, perform a service, or sell property, the offer must be specific and communicated directly.

Acceptance occurs when the other party agrees to the terms of the offer exactly as presented. Any attempt to change the terms counts as a counteroffer, not acceptance. This mutual assent forms the core of a binding agreement.

This refers to something of value exchanged between the parties—money, services, or a promise to do (or not do) something. Without consideration, a contract is essentially a gift, not a legal obligation.

Both parties must be legally competent to enter the contract. This means they must be of sound mind, of legal age, and not under the influence of substances that impair judgment. Contracts with minors or mentally incapacitated individuals may be voidable.

The purpose of the contract must be lawful. An agreement to commit an illegal act—like selling stolen goods—is not enforceable, no matter how clear the terms.

Often overlooked, this element ensures that all parties understand and agree to the same terms. It’s not enough to sign a document; true awareness means knowing what you’re agreeing to, free from coercion or deception.

When all six elements are present, the contract stands on solid legal ground. Knowing these basics helps protect your rights and avoid misunderstandings—whether you're signing a lease, hiring a contractor, or closing a business deal.