Illusory Promise

In one sentence

A promise that appears binding but actually gives one party the power to escape it.

Plain English

An illusory promise looks like a commitment on the surface, but it's really not—because the person making it can back out whenever they want. For example, promising to buy "as much as I feel like" gives you total discretion and isn't a real promise at all. Courts reject illusory promises because they don't create mutual obligation, which is essential for a valid contract. If only one side has a real commitment, there's no bargained-for exchange and no enforceable deal.

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Example

An employer tells an employee, "I'll pay you a bonus whenever I decide you've earned one." This is illusory because the employer has complete discretion and hasn't actually promised anything specific. The employee has no enforceable right to any bonus.

Used in a sentence

“The contract failed because the company's promise to provide services "at its sole discretion" was illusory and unenforceable.”

Related terms

Bargained-for Exchange

A mutual agreement where each party gives something of value in return for something from the other.

Voidable Contract

A contract that one party can cancel or reject, but is otherwise valid.

Capacity

The legal and mental ability to enter into a binding contract.

Uncertainty

Vagueness or ambiguity in contract terms that prevents enforcement.

Offer

A proposal to enter into a binding agreement on specific terms.

Acceptance

Agreeing to the exact terms of an offer, creating a binding contract.

Consideration

Something of value exchanged by each party to make a contract binding.

Offeror

The person who makes an offer to enter into a contract.

This page is a plain-English reference and is not legal advice. Laws vary by jurisdiction and change over time. For specific situations consult a licensed attorney.