The Requirement of Consideration in English Contract Law

Consideration is a fundamental requirement for the formation of a binding contract in English law. A promise is not enforceable as a contract unless it is supported by consideration—something of value given in exchange for the promise. The doctrine distinguishes legally enforceable bargains from gratuitous promises, which are generally unenforceable unless made by deed. Consideration is the price for which the promise is bought and ensures that only genuine exchanges attract contractual enforceability. The requirement of consideration reflects the common law’s emphasis on bargain as the basis of contractual obligation, distinguishing contract law from the law of gifts and from civil law systems where a promise may be binding without exchange.

Definition and Essential Elements

Consideration was defined in Currie v Misa (1875) as “some right, interest, profit, or benefit accruing to one party, or some forbearance, detriment, loss, or responsibility given, suffered, or undertaken by the other.” Consideration must be sufficient but need not be adequate—courts do not inquire into the economic equivalence of the exchange. A peppercorn can be sufficient consideration, no matter its actual value, and a promise to pay £1 for a valuable painting can be binding even if the price is grossly inadequate. This principle reflects the freedom of parties to determine their own bargains without judicial supervision of the substantive fairness of the exchange. Consideration must move from the promisee, meaning the person seeking to enforce the promise must have provided the consideration. Consideration must not be past—it must be given in exchange for the promise, not before it. However, there are exceptions for services rendered at the promisor’s request where payment was impliedly expected, as established in Lampleigh v Brathwait (1615).

Key Principles

Consideration must be real and of some value in the eye of the law. Performing an existing duty imposed by law is not sufficient consideration—a witness cannot demand payment for giving evidence, and a police officer cannot claim a reward for arresting a criminal. Performing an existing contractual duty owed to the promisor is generally insufficient, as established in Stilk v Myrick (1809) where sailors who agreed to work a ship home after crew desertion were held not to have provided fresh consideration. However, performing an existing duty owed to a third party can constitute consideration, as confirmed in The Eurymedon (1975). Part payment of a debt does not satisfy the debt unless additional consideration is provided—this rule from Pinnel’s Case (1602) and Foakes v Beer (1884) has been criticised but remains good law. The rule means that paying less than the full amount of an undisputed debt does not discharge it, even if the creditor agrees to accept less. However, the doctrine of promissory estoppel, established in Central London Property Trust Ltd v High Trees House Ltd (1947), may render a promise to accept part payment binding where it would be inequitable to go back on the promise.

Exceptions and Alternatives

The deed provides a formal alternative to consideration. A promise made by deed is enforceable without consideration because the formality of execution substitutes for the bargain requirement. Contracts under seal were the historical predecessor of the modern deed. Other exceptions include contracts governed by the law of equity, where the court’s equitable jurisdiction may enforce promises that lack consideration in appropriate cases. Promissory estoppel may make a promise binding where the promisee has relied on it to their detriment, though this doctrine generally operates as a shield rather than a sword—it can be used to defend a claim but not to bring one. The requirements for promissory estoppel include a clear promise or representation, reliance by the promisee, and inequity in allowing the promisor to go back on the promise.

Consideration and Privity

The requirement that consideration move from the promisee links the doctrine of consideration to the doctrine of privity. A person who has not provided consideration generally cannot enforce a contract, even if the contract was intended to benefit them. This connection was confirmed in Dunlop Pneumatic Tyre Co Ltd v Selfridge & Co Ltd (1915), where the House of Lords held that a manufacturer could not enforce a resale price maintenance agreement against a retailer because consideration had not moved from the manufacturer. The Contracts (Rights of Third Parties) Act 1999 modified this rule by conferring enforcement rights on third parties in certain circumstances, but the Act preserves the requirement of consideration as between the original contracting parties.

Contemporary Significance and Reform Debates

The requirement of consideration has been criticised as technical and unnecessary. The Law Commission has proposed reform, and other common law jurisdictions have modified or abolished the requirement. The United Nations Convention on Contracts for the International Sale of Goods (CISG) does not require consideration, and American law has adopted the Uniform Commercial Code which dispenses with consideration for firm offers and contract modifications. English law, however, retains the doctrine as a distinguishing feature of its contract law. The courts have developed flexible approaches—including identifying consideration in mutual promises, implied requests, and detriment—that mitigate the doctrine’s rigour while preserving its core function of distinguishing bargains from gifts. The retention of consideration reflects the importance of bargain as the foundation of contractual obligation in English law.