A supplier promises a free upgrade. A customer agrees to pay extra for work already required. A founder offers a departing partner money without asking for anything in return. These promises may sound clear, but clarity alone does not make a contract enforceable. Under California consideration contract law, courts generally look for a legally sufficient exchange. This article explains what qualifies as consideration, why gifts and past favors can create problems, and how California businesses and individuals can document agreements more carefully.
Consideration contract law: what counts in California?
Consideration is the exchange that supports a contractual promise. California Civil Code § 1605 recognizes either a benefit conferred or agreed to be conferred on the person making the promise, or a prejudice suffered or agreed to be suffered by another person, as an inducement to the promise. The usual rule is that the benefit must be something the promisor is not already legally entitled to receive, or the prejudice something the other person is not already legally bound to suffer. Civil Code § 1606 also recognizes certain existing legal obligations and moral obligations arising from a prior benefit or prejudice as consideration, but only to the corresponding extent.
In plain English, a promise ordinarily must be supported by a bargained-for legal benefit or prejudice. Consideration need not consist of separate performances by both contracting parties, and it may come from or benefit a third person. It does not have to be money, and the parties do not necessarily need to exchange things of equal market value.
- Payment: A customer promises $3,000 in exchange for consulting services.
- A return promise: A vendor commits to delivery, and the buyer commits to payment.
- Performance: Someone completes a requested task in exchange for an offered payment.
- Giving up a right: A party agrees to release a disputed claim as part of a settlement.
Consideration is only one requirement. Capacity, consent, legality, and any applicable writing requirements also matter. A well-documented exchange cannot make an unlawful agreement enforceable.
Why a free promise may not create a contract
A promise to make a gift ordinarily lacks consideration. If a business owner says, “I will give you $5,000 next month,” and asks for nothing in return, the recipient usually cannot enforce that statement as an ordinary contract merely because it was sincere.
The key question is whether the recipient’s action was requested as the price of the promise. Compare these examples:
- Gift promise: “You have been a good neighbor, so I will give you my old office furniture.”
- Exchange: “You can have the furniture if you clear out the storage unit and dispose of the remaining items.”
The second arrangement may involve consideration because the requested work is exchanged for the furniture. By contrast, a logistical condition, such as asking someone to pick up a gift, does not necessarily turn the gift into a bargain. Context matters.
A completed gift is different from an unfulfilled promise to give something later. The absence of contractual consideration does not automatically undo a gift that has already been validly transferred.
Past favors and existing duties create problems
Work completed before a new promise is made generally was not performed in exchange for that promise. For example, a consultant who finishes a project under an existing agreement may have difficulty enforcing a later, unsolicited promise of an additional payment based only on those completed services.
California Civil Code § 1606 recognizes, to the corresponding extent, an existing legal obligation resting on the promisor and a moral obligation originating in a benefit previously conferred on the promisor or prejudice previously suffered by the promisee. Mere gratitude, without that statutory basis, is not sufficient consideration. If payment for earlier work is disputed, an agreement resolving that dispute may present a different analysis from a simple thank-you payment.
An existing legal duty can also be a problem. If a contractor already owes delivery of specified work for an agreed price, promising to deliver that same work generally does not supply fresh consideration for an additional payment.
Changes deserve their own review. Added services, a revised delivery commitment, or another genuinely new obligation may support a new exchange. California Civil Code § 1698 permits a written contract to be modified by a writing; by an oral agreement to the extent that agreement is executed by the parties; or, unless the contract otherwise expressly provides, by an oral agreement supported by new consideration. The Statute of Frauds must also be satisfied if the contract as modified falls within it. Do not assume that calling a payment an “amendment” resolves every issue.
A signed writing helps, but does not answer everything
Under California Civil Code § 1614, a written instrument is presumptive evidence of consideration. Under § 1615, the party seeking to invalidate or avoid the instrument must show a want of consideration sufficient to support it. The § 1614 presumption concerns the burden of producing evidence; it does not establish that every written promise is enforceable.
That presumption matters, but it is not the same as proof that every signed promise is enforceable. A recital such as “for valuable consideration” can still be challenged. A nominal amount may be sufficient if it was genuinely bargained for as the exchange for the promise; California generally does not require consideration to be equal in market value. A recital or token amount that was not actually bargained for may be challenged.
There is also a separate doctrine called promissory estoppel. In appropriate circumstances, reliance on a sufficiently clear promise may support enforcement even without ordinary contractual consideration. Courts examine factors including reasonable, foreseeable reliance and resulting injury. Simply expecting a promised gift is not enough. Significant spending or other changes of position may warrant closer review, but reliance does not automatically establish a claim.
Document the exchange before a dispute develops
When reviewing business contracts, focus on what each party actually commits to do, not just the agreement’s label.
- Identify the exchange. State the payment, services, property, release, or other commitment each party provides.
- Separate new obligations from old ones. Explain what changes rather than repeating duties already owed.
- Use specific terms. Include scope, timing, payment conditions, and any limits on discretion.
- Preserve the record. Keep signed agreements, amendments, correspondence, and evidence of performance.
These steps make the parties’ intentions easier to evaluate. They also help distinguish a negotiated agreement from an informal assurance or intended gift.
Talk to a California business attorney
If you are unsure whether a promise or contract amendment includes sufficient consideration, Itkin Law offers a free consultation for California businesses and individuals. Schedule a free consultation or call (424) 603-8888.
This article is attorney advertising and provides general information only. It is not legal advice and does not create an attorney–client relationship. The law changes, and this article reflects the law as of its publication date. Every situation is different — contact us to discuss how the law applies to your exact circumstances. See our full disclaimer.
