This guide is maintained as a current resource for September 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Explore what consideration means in commercial contracts under English law, why it is essential for enforceability, how it works in practice, and common legal issues such as past consideration, modified agreements, and sufficiency of consideration. Learn practical guidance for drafting contracts that stand up in court.
Consideration is a fundamental legal concept in contract law in England and Wales. It plays a central role in determining when a commercial contract becomes legally enforceable, and this article explains what consideration is, why it matters, how it works in practice, and common legal issues that arise in commercial contexts. The explanation is step‑by‑step and accessible for solicitors, business people, and members of the public with no prior legal training.
What Is Consideration?
In English contract law, consideration is the “something of value” that each party promises to give, do, or refrain from doing under a contract. It is the price of the promise that each side offers in exchange for the other's promise or performance. If there is no consideration, a simple contract is generally not enforceable in law.
Put simply, consideration distinguishes a contractual agreement from a gratuitous promise. If one party gives something and the other does not give anything in return, the law usually regards the arrangement as a gift, not a contract.
Legal Principles Underpinning Consideration
For consideration to support an enforceable contract, the following core legal principles apply:
1. Mutual Exchange of Value
Consideration must involve an exchange. Each party to the contract must do something of value in return for the other party's promise. This mutuality helps confirm that the parties intended to be legally bound.
Example: A supplier agrees to deliver goods and the buyer agrees to pay £10,000. Both sides provide consideration: delivery of goods and payment of money.
2. Consideration Must Be Sufficient but Need Not Be Adequate
The law requires that consideration has some legal value, but it does not assess whether it is a fair or equivalent bargain. A nominal sum can be valid consideration if the parties genuinely agreed to it.
Example: Agreeing to sell a machine worth £50,000 for £1 can still satisfy the requirement of consideration if both parties agreed.
3. Consideration Must Move from the Promisee
The party seeking to enforce the contract must have provided the consideration. Consideration cannot be given by a third party on behalf of the promisee.
4. Consideration Must Be Present or Future
The law generally does not recognise past actions as valid consideration for a present promise. Past conduct done before the promise was made has no bearing on the enforceability of the new contract.
Example: If a supplier performed work before agreeing the contract terms, but no promise of payment was made at the time, the subsequent promise to pay may lack valid consideration.
5. Consideration Cannot Be Something You Are Already Obliged to Do
If someone merely promises to do what they are already legally or contractually obliged to do, this is usually not valid consideration for a new promise - unless it provides an additional benefit recognized by the courts.
Types of Consideration
Consideration in a commercial contract can take several forms:
- Monetary payment – the most common form in business agreements.
- Performance of services – such as delivering goods or completing work.
- Provision of goods – supplying products or materials.
- Promises to do something – such as future performance obligations.
- Forbearance – a promise not to enforce a right, like agreeing not to pursue a debt.
The law treats all these as potentially valid forms of consideration if they involve real legal value and are part of the exchange between the parties.
Why Consideration Matters in Commercial Contracts
In England and Wales, consideration is a key part of the test for legal enforceability of many contracts. A contract formed without consideration, unless made as a deed, is generally unenforceable.
Deeds are a special category of formal written instruments that can be binding without consideration if executed correctly (for example, signed, witnessed, and delivered as a deed).
In commercial practice, consideration serves these purposes:
- It helps distinguish binding contracts from informal promises or negotiations.
- It supports the enforceability of agreements in courts and tribunals by showing a genuine reciprocal bargain.
- It clarifies what each party is obliged to do, aiding dispute resolution if performance issues arise.
Without clear consideration, a party may find it difficult to enforce a contract or a variation to an existing agreement.
Common Legal Issues Involving Consideration
Past Consideration
The general rule is that past actions cannot count as valid consideration for new contractual promises. In Roscorla v Thomas, the court confirmed that a promise made after obligations were performed was not enforceable because the consideration had already been provided before the promise.
Modified Contracts and Practical Benefits
Traditionally, performing existing contractual duties was not seen as new consideration. However, in Williams v Roffey Bros & Nicholls (Contractors) Ltd, the Court of Appeal held that where a promisor obtains a practical benefit from the promisee's performance, this can amount to valid consideration.
Example: If a contractor agrees to complete work on time in exchange for extra payment, and the other party avoids a penalty by receiving that performance, the practical benefit can satisfy the consideration requirement.
Adequacy Versus Sufficiency
Courts do not typically assess whether the consideration is adequate (fair or equal in value) but will check that it is sufficient to support the contract. A token or nominal payment, if genuinely agreed, can suffice.
Practical Steps for Businesses
To reduce the risk of contract disputes related to consideration:
- Document the exchange clearly, showing what each party gives or promises to do.
- Avoid relying on past actions as evidence of contractual value without corresponding commitments at the time of agreement.
- Consider whether a deed is more appropriate where one party cannot provide consideration but you still want enforceability (for example, unilateral obligations).
- When modifying existing contracts, ensure that any changes include fresh consideration or documentation that supports enforceability under recognised legal principles.
Obtaining legal review before finalising commercial contracts can help avoid common pitfalls and unintended unenforceability.
Key Takeaways
Consideration in a commercial contract is about the exchange of value between the parties. It is one of the core requirements for a contract to be legally binding in England and Wales. Consideration must be something of value, provided by both parties, and connected to the promises made in the agreement. It need not be equal in economic terms, but it must be present and legally recognisable. Without it, a contract may fail to be enforceable unless it is executed as a deed or supported by other legal doctrines. Understanding how consideration works helps businesses structure valid contracts and manage legal risk in commercial relationships.
