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Reviewed by Casa Academy and updated July 29, 2026 using the current DBPR checklist and Pearson VUE scheduling guidance.

Bilateral Contracts vs Unilateral Contracts

A bilateral contract binds two parties who exchange mutual promises to perform. A unilateral contract binds only the offeror until the offeree completes the requested act, at which point acceptance occurs by performance.

Exam context

Identify whether both parties have made promises or only one party promised payment upon performance. Earnest money deposits and signed counteroffers usually signal a bilateral contract once acceptance is complete.

Bilateral: mutual promises

Most residential purchase agreements are bilateral: the buyer promises to pay the price and the seller promises to deliver marketable title. Each party can sue for breach if the other fails without legal excuse. Consideration flows both ways through the exchanged promises.

Unilateral: acceptance by performance

A classic unilateral offer is a reward posted for finding lost property. The offeror promises to pay only if someone performs the act. In real estate, some option agreements resemble unilateral offers until the optionee exercises by delivering notice and consideration within the option period.

Examples

  • Accepted purchase offer

    Buyer and seller sign a residential contract. Both are bound to perform on the closing date, making the agreement bilateral.

  • Open listing reward style

    An owner offers a flat fee to whichever broker procures a ready buyer. Some states treat procuring-cause disputes under contract principles similar to unilateral acceptance by performance.

Keep studying

Practice bilateral contracts vs unilateral contracts questionsEnroll in pre-licensing

Related terms

  • ContingentContract status when a condition must occur before closing.
  • Attorney-in-factSomeone who may sign contract documents under a power of attorney.

Related resources

Sources