Promissory Estoppel

Promissory estoppel is an equitable doctrine that makes a promise enforceable even in the absence of consideration — the traditional requirement for an enforceable contract. Codified in Restatement (Second) of Contracts Section 90, it serves as a safety net for situations where strict application of the consideration requirement would produce unjust results.

The doctrine requires four elements: (1) a clear and definite promise; (2) the promisor should reasonably expect the promise to induce action or forbearance by the promisee; (3) the promisee actually and reasonably relies on the promise to their detriment; and (4) injustice can be avoided only by enforcing the promise. The remedy is limited as justice requires and may be capped at reliance damages rather than full expectation damages.

The landmark case Hoffman v. Red Owl Stores illustrates the doctrine's reach. The Hoffmans relied on Red Owl's assurances that a franchise would be granted and, in reliance, sold their bakery, bought a grocery store, and moved their family. When the franchise was never granted, the court enforced the promise under promissory estoppel despite the absence of a formal contract.

Promissory estoppel also plays an important role in the subcontractor bidding context. In Drennan v. Star Paving, a general contractor relied on a subcontractor's bid in submitting its own bid to the project owner. When the subcontractor tried to revoke the bid, the court held the bid irrevocable under promissory estoppel because the general contractor had reasonably and foreseeably relied on it.

The doctrine represents a tension between the traditional requirement of consideration (a bargained-for exchange) and the equitable principle that detrimental reliance on a promise should be protected. Courts generally apply promissory estoppel cautiously, using it as a substitute for consideration only when the equities clearly favor enforcement.

On contracts exams, promissory estoppel should be raised whenever there is a promise that lacks consideration but has induced detrimental reliance. It often appears as an alternative theory to breach of contract.