What Is Consideration in Contract Law?

A promise given in exchange for another promise. For example, a supplier promises to deliver goods and the buyer promises to pay on delivery. Both promises are executory: neither side has performed yet, but the contract is binding from the moment of exchange.

Consideration that has already been performed. When a party performs an act in exchange for a promise, the act is executed consideration. The classic case: A offers a reward, B finds the lost item, and A must pay. B's act was performed in exchange for A's promise.

Money is the most obvious form, but consideration can also be goods, services, property, a promise to forbear from suing, or even a promise to give up a legal right. The key is that it must be something the law regards as having value.

Doing something you are already legally obliged to do is not consideration. Performing an existing contractual duty for the same party, or a public duty such as a police officer catching a criminal, cannot support a new promise.

Past consideration is consideration given before the promise was made. If the act was not done in exchange for the promise, it does not count. A promise to pay someone for a service they already performed voluntarily is generally unenforceable (subject to exceptions such as a request implied in advance).

A promise that the promisor has no intention of being bound by, or an illusory promise where the promisor can choose whether to perform, is not consideration. Similarly, vague or indeterminate promises fail for lack of certainty.

Currie v Misa (1875) gave the classic definition: consideration is 'some right, interest, profit or benefit accruing to one party, or some forbearance, detriment, loss or responsibility given, suffered or undertaken by the other'. The case also established that consideration must move from the promisee - the person enforcing the promise must have provided something in exchange.

Stilk v Myrick (1809) held that a promise to pay extra wages to sailors who worked a ship home short-handed was unenforceable: they were already contractually obliged to do the work. The modern exception is Williams v Roffey Bros (1991), which allowed enforcement where the extra payment conferred a practical benefit and no duress was involved. The lesson for digital contracts: paying more for the same obligation is risky; renegotiating scope with fresh consideration is safe.

Chappell & Co v Nestlé (1960) held that three chocolate-bar wrappers were valid consideration for a record, even though the wrappers were worthless once torn. The House of Lords refused to weigh the adequacy of consideration. Practical takeaway: courts will not police whether your deal is fair, only whether there was a real bargained-for exchange.

The High Trees case (Central London Property Trust v High Trees House, 1947) developed promissory estoppel: a promise to accept less rent was binding because the landlord's promise was relied upon. Promissory estoppel operates as a shield, not a sword - it can stop a party going back on a promise, but it does not create a new cause of action. This matters for e-signed amendments: a party may be estopped from denying a variation even without fresh consideration.

An e-signature does not create consideration; it records consent. The consideration analysis is identical whether the contract is signed on paper or electronically. The signature evidence simply proves that the party agreed to the terms that contain the exchange.

An electronic signature platform strengthens the evidence that a contract with valid consideration was actually formed: it captures when the party signed, their identity verification, and a tamper-evident record of the exact terms they agreed to. This matters when a party later disputes that there was an enforceable exchange.

Some agreements that would otherwise need consideration, such as deeds and certain guarantees, are also being digitised. The legal requirements for a deed (writing, sealing, delivery) still apply, but e-signature platforms increasingly support the electronic execution of deeds in jurisdictions that permit it.

French law requires a 'cause' - the reason or purpose of the obligation. The 2016 reform of the Civil Code replaced the requirement of cause with the notion that a contract is valid if it has a lawful and certain content, though 'cause' still influences how courts police contracts (e.g., obligations without legitimate interest can be challenged).

German law does not use 'consideration' but requires agreement and, for some contracts, a specific form. The concept closest to consideration is the 'causa' of the obligation in legal-dogmatic analysis, but German courts do not strike down contracts merely for lack of exchange value - unconscionability (Section 138 BGB) plays that role.

Chinese contract law (Civil Code, 2021) does not require consideration. A contract is valid when the parties have capacity, intention is genuine, and content is lawful. The functional equivalent of policing unfair bargains is the 'grossly unfair' doctrine (显失公平), which allows a party to apply to a court or arbitral institution to rescind or vary a contract where one party took advantage of the other's distress or lack of judgment.

For e-signed cross-border contracts, the governing law clause decides which regime applies. A US-style NDA or SOW referencing 'consideration' should not be assumed to work the same under German or Chinese law. This is one more reason to state governing law explicitly and to have local counsel review the boilerplate.

Country, state or sector and the transaction entities involved.

Primary source, effective date and reviewer.

Completed test and retained evidence package for the target process.