English Contract Law: 10 Key Facts You Need to Know

English contract law underpins the vast majority of commercial relationships in England and Wales, and is widely used as the governing law for international transactions. This article sets out ten fundamental principles that anyone entering into contracts should understand.

1. A contract requires offer, acceptance, consideration, and intention

Four elements are required for the formation of a binding contract under English law: an offer by one party, acceptance of that offer by the other, consideration (something of value exchanged by each party), and an intention to create legal relations. If any of these elements is absent, no binding contract exists.

2. Contracts do not generally need to be in writing

English law does not require most contracts to be in writing. Oral agreements are legally enforceable, although proving their terms can be difficult. Certain categories of contract must be in writing, including contracts for the sale or disposition of land (Law of Property (Miscellaneous Provisions) Act 1989), guarantees (Statute of Frauds 1677), and regulated consumer credit agreements.

3. Consideration must be sufficient but need not be adequate

Consideration is the price paid for a promise. It must have some value in the eyes of the law (it must be "sufficient"), but the courts will not assess whether the bargain is fair (it need not be "adequate"). A nominal payment — even a peppercorn — can constitute valid consideration, as confirmed in Chappell & Co v Nestlé [1960]. Past consideration (something already done before the promise was made) is generally not valid consideration.

4. Commercial agreements are presumed to be binding

In a commercial context, there is a strong presumption that the parties intend to create legal relations. This presumption can be rebutted, but only by clear evidence to the contrary — for example, by expressly stating that an agreement is "subject to contract" or not intended to be legally binding. By contrast, social and domestic agreements are presumed not to be intended as binding contracts.

5. Contracts may contain express and implied terms

Express terms are those specifically agreed by the parties, whether orally or in writing. Implied terms are those incorporated by statute (such as the Consumer Rights Act 2015 or the Sale of Goods Act 1979), by custom or trade usage, or by the courts where necessary to give the contract business efficacy. Implied terms cannot generally override clear express terms.

6. The doctrine of privity limits enforcement to the parties

The general rule is that only the parties to a contract may enforce its terms. A third party who benefits from a contract cannot sue on it. However, the Contracts (Rights of Third Parties) Act 1999 created a significant statutory exception, allowing third parties to enforce terms where the contract expressly provides for this or where the term purports to confer a benefit on them.

7. Certain factors may invalidate a contract

A contract may be void (treated as if it never existed) or voidable (valid until set aside) if affected by certain vitiating factors. These include misrepresentation (a false statement of fact inducing the contract), duress (threats or illegitimate pressure), undue influence (exploitation of a relationship of trust), and certain categories of mistake. The Misrepresentation Act 1967 provides remedies including rescission and damages.

8. Parties must have capacity to contract

A valid contract requires that each party has the legal capacity to enter into it. Minors (persons under 18) have limited capacity and may avoid most contracts, except for necessaries and beneficial contracts of service. Companies must act within their constitutional powers. Persons lacking mental capacity may also have contracts set aside in certain circumstances.

9. Breach of contract gives rise to remedies

Where a party fails to perform its contractual obligations, the innocent party is entitled to remedies. The primary remedy is damages — a monetary award designed to put the innocent party in the position it would have been in had the contract been performed. Damages must not be too remote: the loss must have been reasonably foreseeable at the time of contracting, as established in Hadley v Baxendale (1854). Other remedies include specific performance (a court order requiring performance) and injunctions.

10. Contracts can be discharged in four ways

A contract can come to an end by performance (both parties fulfil their obligations), by agreement (the parties mutually agree to release each other), by breach (a sufficiently serious breach entitles the innocent party to treat the contract as at an end), or by frustration (a supervening event renders performance impossible or fundamentally different from what was contemplated). The innocent party must take reasonable steps to mitigate any losses arising from a breach.