In plain terms
Consideration is what each side puts on the table. It can be a benefit one party receives, a detriment the other party accepts, or a return promise, so long as it is exchanged as the price of the other side’s promise. Courts describe this as a “bargained-for exchange”: the promise induces the consideration, and the consideration induces the promise (Restatement (Second) of Contracts, Section 71).
The value does not have to be money. Delivering goods, performing a service, forbearing from a legal right you could otherwise exercise, or promising to do any of these can all count. What matters is that both parties give and receive something as part of the deal.
Why it matters in a contract
Consideration is one of the core elements that separates an enforceable contract from a non-binding promise, alongside offer, acceptance, and the mutual intent to be bound. If a court finds that one side gave no consideration, the agreement may be void or unenforceable, and the disappointed party may be left with no remedy.
Several practical rules flow from this requirement:
- Adequacy versus sufficiency: courts usually will not weigh whether the exchange was a fair bargain, so even nominal or token consideration can support a contract, but the consideration must be legally sufficient and real.
- Past consideration: something already given or done before the promise was made generally does not count, because it was not bargained for in exchange for the new promise.
- Preexisting duty: promising to do what you are already legally obligated to do is typically not valid consideration.
- Illusory promises: a promise that leaves performance entirely to one party’s unrestricted discretion may fail for lack of mutuality.
There are important exceptions. Under the Uniform Commercial Code, a good-faith modification of a contract for the sale of goods needs no new consideration (UCC Section 2-209). Separately, the doctrine of promissory estoppel can make a promise enforceable without consideration when one party reasonably relied on it to their detriment.
Example
A software vendor promises to deliver a license, and a business promises to pay $5,000 for it. Each promise is the price of the other, so consideration exists on both sides and the contract is enforceable. If instead the vendor simply promised to give the license away for nothing, with no return promise or payment, that promise would likely be an unenforceable gift for lack of consideration.
Managing consideration across a contract portfolio
Consideration is usually easy to spot in a clean, two-sided commercial deal, but it becomes harder to track through amendments, renewals, and side letters, where a change may lack fresh value. A CLM platform such as Pactolane keeps every version and amendment in a single contract repository with a full audit trail, so you can trace what each party agreed to give at each stage. PactAI can produce a multilingual executive summary and answer questions about a specific contract through conversational AI chat, helping your team confirm what each side is actually exchanging before signature. PactAI prepares the analysis; your legal team decides.
This page provides general legal information, not legal advice. For a specific agreement, consult a qualified attorney.
Frequently asked questions
What is consideration in contract law?
Consideration in contract law is the bargained-for exchange of value that each party gives so that a promise becomes legally binding. It can take the form of money, goods, services, a return promise, or forbearance from exercising a legal right. Without it, a promise is generally treated as an unenforceable gift rather than an enforceable contract.
Does consideration have to be money or of equal value?
Consideration does not have to be money, and it generally does not have to be of equal value to what the other party gives. US courts usually decline to judge whether a bargain was fair, so even nominal consideration can be enough, provided it is real and legally sufficient. The exchange, not its fairness, is what the law requires.
Is past consideration valid?
Past consideration is generally not valid consideration in US contract law. Because something already given or performed before a promise was made was not bargained for in exchange for that promise, it usually cannot support a new contract. A fresh, bargained-for exchange is normally required for the promise to be enforceable.
What happens if a contract lacks consideration?
If a contract lacks consideration, it is generally unenforceable, and neither party can typically compel the other to perform. In some situations a promise may still be enforced through promissory estoppel, when one party reasonably and detrimentally relied on it. For sales of goods, the Uniform Commercial Code also allows good-faith modifications without new consideration.
What is the difference between consideration and a gift?
The difference between consideration and a gift is the presence of a bargained-for exchange. Consideration means each side gives something as the price of the other's promise, which makes the agreement enforceable, while a gift is a one-sided transfer with nothing given in return. A promise to make a gift is usually not enforceable for lack of consideration.
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