Definition
Consideration is the thing of value exchanged between contracting parties that transforms a bare promise into a legally enforceable contract. It is the price paid for a promise — what one party gives, does, refrains from doing, or promises to give or do in exchange for the other party's promise or performance.
More precisely, consideration is a benefit received by the promisor or a detriment suffered by the promisee, bargained for and given in exchange for the promise. Both elements — bargain and exchange — are essential. A gift, however generous, is not a contract because nothing is given in return for the promise to give it.
Consideration may take several forms:
1. A promise: I promise to pay you $500 in exchange for your promise to paint my house.
2. An act: I will pay you $500 when you complete the painting.
3. A forbearance: I will pay you $500 if you refrain from filing suit against me.
4. The creation, modification, or destruction of a legal relationship.
The consideration need not be monetary, and courts generally do not weigh its adequacy — a peppercorn will suffice, so long as it is genuinely bargained for. What consideration cannot be is illusory (a promise that commits the promisor to nothing), pre-existing (an obligation already owed), or past (something already done before any promise was made).
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Common Language
Modern common usage (Wiktionary): Careful thought or deliberation; regard for the needs or feelings of others; a payment or reward.
Historical common usage (Webster's 1913): "The act or process of considering; continuous careful thought; regard; recompense or reward; something given in exchange."
The common meaning captures deliberation and regard — the mental act of thinking something over. The legal meaning is narrower and technical: consideration is not mere thought or even motivation, but an exchange of legal value. A party may have been induced to contract by kindness, sympathy, or moral pressure, yet none of those constitute consideration in law. The specific trap is the word "recompense" in the historical definition: in contract law, consideration is not simply compensation after the fact but must be bargained for in advance as part of the exchange.
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Common Confusion
CONSIDERATION vs. MOTIVE: The motive behind a promise — why a party was moved to make it — is not consideration. A promisor may be morally impelled to act, yet that impulse does not supply the legal requirement. Courts do not inquire into motive when assessing consideration, but they do require that the consideration be the actual object of the bargain.
CONSIDERATION vs. CONDITION: A conditional promise ("I will give you my car if you come to my house to pick it up") may look like consideration, but if the condition benefits only the promisor or is merely a formality for receiving a gift, it is not a bargained-for exchange. Distinguishing conditions from consideration is a persistent source of difficulty in gratuitous-promise cases.
PAST CONSIDERATION: Something already done before a promise is made cannot be consideration for that promise, because it was not given in exchange for it. Many historical sources — including Rapalje & Lawrence — address this rule, but the moral-obligation exception recognized in some American jurisdictions complicates the picture. See the encyclopedia entry on Past Consideration and Moral Obligation.
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Core Elements
For consideration to be legally operative, courts generally require:
1. BENEFIT OR DETRIMENT: The promisee must suffer a legal detriment (giving up a legal right or assuming a legal obligation) or the promisor must receive a legal benefit. Detriment to the promisee is the dominant modern test.
2. BARGAINED-FOR EXCHANGE: The consideration must be sought by the promisor in exchange for the promise, and must be given by the promisee in exchange for the promise. This bidirectional bargain distinguishes consideration from conditions on a gift.
3. NOT ILLUSORY: A promise that leaves its maker entirely free to perform or not perform at will gives nothing of legal value and is illusory — it is not consideration. Mutuality of obligation, while not a separate doctrine under modern analysis, reflects this requirement.
4. NOT PRE-EXISTING DUTY: A promise to do what one is already legally obligated to do is not valid consideration. The pre-existing duty rule has been partially abrogated by statute in some jurisdictions (particularly for contract modifications under the UCC) but remains significant in common law contract analysis.
5. NOT PAST: The act or forbearance must be contemporaneous with or subsequent to the promise — not already completed before the promise was made.
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Recognized Forms
/SUBTYPES
EXECUTORY CONSIDERATION: A promise in exchange for a promise; neither party has yet performed. The standard bilateral contract rests on executory consideration.
EXECUTED CONSIDERATION: An act already performed in response to the promisor's offer, as in a unilateral contract. The act itself serves as consideration.
NOMINAL CONSIDERATION: Consideration that is stated but bears no real relationship to the value of what is promised — a dollar in exchange for a $100,000 guarantee, for example. Courts are divided on whether purely nominal consideration is sufficient; see the encyclopedia entry on Adequacy of Consideration and Nominal Consideration.
MORAL CONSIDERATION: A moral obligation arising from a prior act or benefit received. Not generally sufficient at common law, but some American courts recognize a limited exception where a material benefit has previously been conferred. See Past Consideration and Moral Obligation.
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Why It Matters in Research
Consideration is the central gateway concept in Anglo-American contract law, and its treatment in historical sources reflects genuine doctrinal evolution that creates research traps.
ADEQUACY VS. EXISTENCE: Early common law sources, including Rapalje & Lawrence, sometimes conflate the rule that courts will not inquire into adequacy with a broader suggestion that any nominal recital of consideration suffices. Modern law draws a sharper distinction: nominal consideration in a signed writing may be valid in some contexts (option contracts, guarantees) but sham consideration in a fully executory agreement may not be. Researchers using historical sources to support adequacy arguments should verify which rule the modern jurisdiction follows.
SEALED INSTRUMENTS: At common law, a seal substituted for consideration entirely — a promise under seal was enforceable without any exchange. Most American jurisdictions have abolished or weakened the seal rule by statute, but historical case law and treatises from the 19th century assume the seal's effect. Arguments drawn from that period's sources about enforceability without consideration may be obsolete in unsealed-instrument contexts.
MORAL OBLIGATION EXCEPTION: The moral obligation doctrine — that a promise made in recognition of a past benefit can be enforced — is an American development that Rapalje & Lawrence acknowledge cautiously. Its contours vary sharply by jurisdiction, and a researcher relying on early treatise authority without checking modern state case law risks importing a rejected or modified rule.
PRE-EXISTING DUTY AND CONTRACT MODIFICATION: The UCC's abrogation of the pre-existing duty rule for goods contracts (no consideration required for written modifications) does not extend to common law service or real property contracts. This is a frequent source of error when researchers generalize from commercial cases to other contract types.
CORPUS CONNECTIONS: Consideration links directly to the formation chapter of any contracts encyclopedia and branches into promissory estoppel (which functions as a consideration substitute), the statute of frauds (which affects enforceability but not consideration), and quasi-contract (which operates precisely when consideration is absent).
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Historical Dictionary Support
Rapalje & Lawrence define consideration as "the cause, motive, price, or impelling influence which induces a contracting party to enter into a contract," adding that it is "some right, interest, profit, or benefit accruing to one party, or some forbearance, detriment, loss, or responsibility given, suffered, or undertaken by the other." This formulation is comprehensive and remains substantially accurate.
What Rapalje & Lawrence capture well: the benefit/detriment duality, the breadth of what qualifies (acts, forbearances, rights), and the rule that courts will not weigh adequacy. They are also careful to distinguish moral from legal obligation, noting that past consideration is generally insufficient.
What the source reflects less clearly: the bidirectional bargain requirement that 20th-century Restatement analysis formalized. The older sources describe consideration in terms of what is given or suffered without fully articulating that the promisor must have sought the consideration as the price of the promise. The bargain theory — as opposed to the earlier benefit/detriment theory standing alone — was consolidated in the First Restatement of Contracts (1932) and sharpened in the Second (1981). Researchers using Rapalje & Lawrence for modern contract analysis should be aware that the bargain element is somewhat underarticulated in their treatment.
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Jurisdictional Note
American jurisdictions are broadly uniform on the core doctrine but diverge on three points: the enforceability of nominal consideration in option and guarantee instruments; the scope of the moral-obligation exception for past material benefits; and the effect of statutory abolition of the seal. The UCC governs consideration for modifications to goods contracts, displacing common law in that domain. Researchers working on multi-jurisdictional problems should verify state-specific treatment of nominal and moral consideration before generalizing.
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Encyclopedia Cross-Reference
Contracts — Adequacy of Consideration and Nominal Consideration (The Law Mind Contracts & Commercial Law Encyclopedia)
Contracts — Past Consideration and Moral Obligation (The Law Mind Contracts & Commercial Law Encyclopedia)
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