Introduction
Contract law determines when a promise or set of promises becomes legally enforceable. People make commitments every day. They promise to meet friends, help relatives, support political causes, perform favors, enter business relationships, purchase property, provide services, and deliver goods. The legal system does not enforce every promise merely because someone expected it to be kept.
A contract is a legally enforceable promise or set of promises. That definition contains two ideas. First, the parties must engage in conduct that the law recognizes as creating a promise or agreement. Second, the law must provide a basis for enforcing that commitment.
A complete Contracts problem therefore requires more than locating an offer and an acceptance. The student must identify the governing body of law, determine what the parties objectively communicated, decide whether their agreement is sufficiently definite, evaluate whether consideration or another enforcement principle exists, identify the terms, examine performance and changed circumstances, determine whether a breach occurred, and select the appropriate remedy.
I The Contracts Analysis Framework
A complete Contracts answer should proceed in a logical order. Every fact in a Contracts question should be placed somewhere within this sequence.
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1Identify the transaction. Determine whether it concerns goods, services, real property, employment, construction, insurance, licensing, or a mixed arrangement.
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2Identify the governing law. Decide whether common law, Article 2 of the Uniform Commercial Code, or another specialized body of law applies.
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3Identify the parties’ communications and conduct. Separate preliminary negotiations from a legally operative offer.
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4Determine acceptance. Ask whether the offer was accepted through an authorized method and before termination.
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5Identify enforcement basis. Look for consideration or another basis for enforcement (like Promissory Estoppel).
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6Determine the agreement’s terms. Consider express language, incorporated documents, gap fillers, course of performance, course of dealing, and trade usage.
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7Evaluate defenses. Look for incapacity, fraud, duress, undue influence, unconscionability, illegality, or public policy violations.
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8Analyze performance. Address performance, conditions, modification, excuse, and breach.
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9Identify the remedy. Select the remedy that places the injured party in the position protected by contract law.
This framework is not merely an examination checklist. It reflects the life cycle of a contractual relationship.
II. What Is a Contract?
A contract is not simply an agreement in the everyday sense. It is an agreement that the legal system recognizes and will enforce.
Some promises are not contractual because they lack objective commitment. A person who says, “I hope to help you move next month,” may be expressing an intention rather than undertaking a legal obligation. Other promises may reflect serious commitments but lack consideration or another recognized enforcement basis. Still others may be unenforceable because the terms are indefinite, the subject matter is illegal, or the agreement violates public policy.
Contract law asks several related questions:
- Did the parties intend, as objectively manifested, to enter a legal relationship?
- Were the terms sufficiently definite?
- Did the parties exchange consideration?
- Does another doctrine support enforcement?
- Is a defense available?
- What obligations did the parties create?
- What remedy follows from nonperformance?
The law does not ordinarily inquire whether the parties felt morally committed. It examines whether their words and conduct created a legally recognizable bargain or other enforceable obligation.
III. Why Contract Law Enforces Some Promises
Contract law serves several functions. It protects reasonable expectations. When parties deliberately exchange promises, each may plan future conduct in reliance on the agreement.
It supports commercial certainty. Businesses must be able to determine whether orders, contracts, modifications, and performance obligations will be enforced.
It facilitates private ordering. Parties may allocate risks, establish prices, define performance standards, and choose remedies.
It protects reliance. A promise may cause another person to spend money, decline alternatives, begin performance, or otherwise change position.
It may also prevent unjust enrichment by requiring payment when one party has received a benefit under circumstances making retention without compensation unfair.
These purposes can conflict. Strict enforcement may promote certainty while producing hardship in an individual case. Flexible enforcement may protect fairness while making commercial planning less predictable. Much of contract doctrine reflects the tension between certainty, autonomy, reliance, and fairness.
IV Sources of Contract Law
Contract law does not come from one source. The applicable rules may be drawn from Common law, Uniform Commercial Code Article 2, Restatement principles, State statutes, Federal statutes in specialized fields, International law, and Judicial decisions.
The first major question in nearly every contract problem is whether Common Law or Article 2 governs.
That classification matters because the two systems differ in formation, acceptance, modification, missing terms, warranties, performance, and remedies.
V. Common-Law Contracts
Common law generally governs contracts involving:
- Services
- Employment
- Real property
- Construction
- Insurance
- Intangibles
A contract to hire an architect is ordinarily governed by common law because the central obligation is professional service. An agreement to sell land is governed by real-property contract principles rather than Article 2. An employment agreement is also outside Article 2 because employment is not a sale of goods.
Common-law formation traditionally emphasizes agreement on sufficiently definite terms and close correspondence between offer and acceptance.
VI. Article 2 and Transactions in Goods
Article 2 of the Uniform Commercial Code generally governs transactions in goods.
Goods are movable, tangible objects identified to the contract. Common examples include automobiles, furniture, machinery, clothing, food, computers, and manufactured products.
The classification should focus on the subject of the transaction rather than the identity of the parties. A lawyer who sells office furniture is participating in a transaction in goods even though the lawyer’s usual occupation involves services. A manufacturer that hires a consultant is entering a service contract even though the manufacturer normally sells goods.
Flexible Formation
Article 2 uses flexible formation principles. A sales contract may exist even when the precise moment of formation is uncertain. Some terms may remain open if the parties intended to contract and there is a reasonably certain basis for providing a remedy. This flexibility reflects the commercial setting where parties form relationships through purchase orders, invoices, and conduct rather than one formal document.
Exam Tip
Always begin a Contracts answer with a governing-law classification when the facts involve goods, services, or a combination. The classification may change the entire formation, modification, and remedy analysis.
VII Mixed Transactions
Some transactions combine goods and services. A contract to purchase and install a furnace includes a movable product and installation labor. A contract for a custom software system may include hardware, coding, consulting, training, and continuing support.
The Predominant-Purpose Test
Many courts use the predominant-purpose test. The court asks whether the transaction is principally for goods or principally for services.
Relevant factors include:
- The language of the agreement.
- The nature of the supplier’s business.
- The relative cost of the goods and services.
- The reason the parties entered the transaction.
Contract language may reveal whether the parties described the transaction as a purchase of equipment or as professional services. The relative prices may show whether the physical product or labor represents the main value. Under this approach, one body of law generally governs the transaction as a whole.
The Gravamen Approach
Some jurisdictions use or recognize a gravamen approach. That method focuses on the portion of the transaction that produced the dispute. If a service-heavy transaction results in injury from a defective physical component, a court may apply Article 2 principles to the product-related dispute even though services predominated overall.
Hypothetical
Homeowner contracts with Heating Company to purchase and install a furnace. The total price is $12,000. The furnace costs $8,500, while installation and testing cost $3,500. The agreement repeatedly refers to the “sale and delivery” of the identified furnace.
Analysis: The predominant purpose is likely the sale of goods. The furnace represents most of the price, the language emphasizes sale and delivery, and the installation supports use of the product. Article 2 will likely govern the entire agreement.
Now suppose Homeowner hires an engineering firm for $40,000 to design a custom energy system, supervise construction, and provide continuing efficiency analysis. The physical equipment costs only $8,000.
The predominant purpose is likely professional service, making common law more appropriate.
VIII The Objective Theory of Assent
Contract formation generally depends on objective manifestations rather than undisclosed intentions.
The Principal Question is NOT:
“What did the party secretly intend?”
The Question IS:
“What would a reasonable person understand from the party’s words and conduct under the circumstances?”
A person who signs an agreement ordinarily cannot avoid the obligation merely by claiming that there was no private intention to be bound. The signature and surrounding conduct objectively communicate assent. The opposite principle also applies: A statement made as obvious humor may not create an offer when a reasonable listener would understand no serious commitment was intended.
Relevant objective evidence may include:
- Spoken words & Written communications
- Signatures & Performance
- Conduct after the alleged agreement
- Prior dealings & Industry customs
- The relationship between the parties
Common Trap
Do not ask whether the defendant privately wanted a contract. Ask what the defendant’s words and conduct would communicate to a reasonable person in the other party’s position.
IX. Mutual Assent
Mutual assent is commonly analyzed through offer and acceptance. One party manifests a willingness to enter a bargain. The other accepts according to an invited or legally authorized method. The parties must objectively agree on sufficiently definite terms.
Under common law, courts traditionally required greater certainty and stricter correspondence between the offer and acceptance. A response that changed or conditioned material terms could operate as a counteroffer rather than acceptance.
Under Article 2, a contract for goods may exist even though the exact moment of formation is unclear or some terms remain open. Mutual assent may also arise through conduct. A buyer may place an order, and a seller may ship the goods. Their conduct may establish a contract even if no single formal document captures the entire agreement.
X. Preliminary Negotiations
Not every communication about a possible transaction is an offer. Preliminary negotiations may include requests for information, price quotations, invitations to submit offers, expressions of future intent, advertisements, catalogs, and letters of intent.
Indicators of Preliminary Negotiation
- Indefinite language ("I may sell...", "approximately").
- Missing important terms.
- Expressions of future willingness.
- Need for additional approval.
- Statements addressed broadly to the public.
Indicators of an Offer
- Present commitment.
- Specific subject matter & definite terms.
- Identified recipient.
- A method or deadline for acceptance.
- Language showing that acceptance alone will conclude the bargain.
XI. Advertisements
Advertisements are ordinarily invitations for customers to make offers. They are often directed to the public, may omit quantity, and may not communicate a commitment to sell to every person who responds. Treating a general ad as an offer could require a retailer to sell unlimited quantities even after inventory is exhausted.
An advertisement may become an offer when it is: Clear, Definite, Explicit, Limited in quantity or recipients, and Structured so that nothing remains open for negotiation.
Advertisement Hypothetical
A store publishes: “Weekend sale—laptops starting at $399 while supplies last.”
This is likely an invitation to make offers. It does not identify a particular model or quantity, and “starting at” leaves price and details unresolved.
Now suppose the store publishes: “One new Model X laptop, serial number 1234, for $399 to the first customer who appears at the store at 9:00 a.m. Saturday and presents this advertisement.”
This is much more likely to constitute an offer. It identifies the product, price, quantity, recipient class, and required performance, leaving little open for negotiation.
XII. Definiteness
An agreement must be sufficiently definite for a court to determine the parties’ obligations and provide a remedy. At common law, important terms often include the parties, subject matter, quantity, price, and time for performance.
Under Article 2, a sales contract may be formed even when price, delivery time, or payment terms remain open. The UCC may supply reasonable gap-filling terms. Quantity remains especially important because a court cannot determine the scope of the obligation without knowing how much must be bought or sold.
Requirements and output contracts state quantity indirectly. A requirements contract measures quantity by the buyer’s good-faith needs. An output contract measures quantity by the seller’s good-faith production. The exact numerical amount may be uncertain, but the contract provides an objective method for determining quantity.
XIII. Agreements to Agree
A vague promise to negotiate later may be unenforceable when essential terms remain unresolved. (e.g., “We agree to enter a future lease on terms to be negotiated”). However, preliminary arrangements may create enforceable obligations depending on language and context.
The parties may create: A duty to negotiate in good faith, An option, An exclusivity agreement, A binding letter of intent, or A preliminary agreement fixing some terms while leaving others for completion.
The phrase “letter of intent” does not itself decide enforceability. Some letters expressly deny any intent to be bound. Others impose immediate duties concerning confidentiality or exclusivity. The analysis must focus on objective meaning.
XIV Freedom of Contract
Contract law generally respects voluntary private ordering. Parties may define obligations, set prices, allocate risk, establish performance standards, and limit remedies. This supports personal autonomy and commercial activity.
But freedom of contract is not unlimited. Enforcement may be restricted by:
- Capacity
- Fraud
- Duress
- Undue influence
- Unconscionability
- Illegality
- Public policy
- Good-faith obligations
These limitations reflect concern that apparent agreement may not always represent meaningful or lawful choice. Contract law enables private choice while deciding when the legal system should refuse to enforce that choice.
XV. Application and Analysis
The Kitchen Equipment Hypothetical
Restaurant sends Supplier an email stating: "We are considering replacing our kitchen equipment this fall. Please send your best estimate for twenty commercial ovens, including installation and training."
Supplier responds: "We can provide twenty Model Z ovens at $8,000 each. Installation and employee training would cost an additional $20,000. These figures are subject to final management approval."
Restaurant replies, "We accept."
1. Governing Law: The transaction includes goods (ovens = $160k) and services (install/training = $20k). The predominant purpose is the sale of goods. Article 2 likely governs.
2. Offer vs. Negotiation: Supplier's response identifies product/quantity/price, BUT it explicitly says "subject to final management approval." This indicates Supplier did not manifest a present willingness to be bound. It is preliminary negotiation.
3. Assent: Restaurant's statement "We accept" cannot create a contract if no offer existed. The label used by Restaurant does not control; the objective legal effect does.
Change the Facts:
Supplier responds: "We offer to sell twenty Model Z ovens at $8,000 each, with installation and training for $20,000. Delivery by Oct 1. You may accept by email no later than Friday."
This is much more likely to constitute an offer. It identifies the subject, quantity, price, services, delivery date, and acceptance method, leaving nothing open for negotiation.
XVI. Bar-Style Analysis Notes
- For every Contracts problem, begin with governing law. State whether common law, Article 2, or a mixed-transaction test applies.
- For mixed contracts, identify the predominant-purpose factors. If the jurisdiction uses gravamen, focus on the portion of the transaction producing the dispute.
- For assent, evaluate objective manifestations. Do not rely on undisclosed intentions.
- For preliminary negotiations, ask whether the speaker expressed a present willingness to be bound immediately upon acceptance.
- For advertisements, apply the general invitation rule and ask if it is clear, explicit, quantity-limited, and complete.
- For definiteness, identify which important terms are missing. Under Article 2, open price/delivery can be filled, but quantity is generally essential.
Exam Tip
Place the facts on a contractual timeline before writing: negotiations, offer, acceptance, consideration, terms, performance, changed circumstances, breach, and remedy. The timeline often reveals which doctrine each fact tests.
Chapter Summary
A contract is a legally enforceable promise or set of promises. A complete contract problem commonly moves through preliminary negotiations, offer, acceptance, consideration, determination of terms, performance, changed circumstances, breach, and remedy.
Common law generally governs services, employment, real property, construction, and intellectual property. UCC Article 2 governs transactions in movable, tangible goods. Mixed transactions may be analyzed under the predominant-purpose test (focusing on language, cost, and reason for contracting) or the gravamen approach (focusing on the part producing the dispute).
Contract formation depends on objective manifestations. The question is what a reasonable person would understand from the parties’ words and conduct in context, not what they secretly intended.
Preliminary negotiations, requests for information, and most advertisements are not offers unless they demonstrate a present willingness to be bound and are explicitly clear and limited in quantity.
An agreement must be sufficiently definite for a court to provide a remedy. Common law requires greater certainty. Article 2 can fill gaps (like price) if parties intended to contract, but quantity usually remains essential. Agreements to agree are often unenforceable, but preliminary documents like Letters of Intent can create binding duties if intended.
Freedom of contract allows private ordering, but is limited by doctrines protecting fairness (fraud, duress, unconscionability, public policy).
Every Contracts problem begins by identifying the governing law and determining whether the parties objectively manifested a legally recognizable agreement.
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