Requirements and Output Contracts Under UCC Article 2

A requirements contract measures quantity by what the buyer actually needs. An output contract measures it by what the seller actually produces. Section 2-306 of the Uniform Commercial Code makes both enforceable and supplies the missing number: the quantity is such actual output or requirements as may occur in good faith, except that no quantity unreasonably disproportionate to a stated estimate — or, if no estimate is stated, to any normal or otherwise comparable prior output or requirements — may be tendered or demanded. Article 2 is a uniform act that each state enacts separately, with variations and its own case law, so the text that governs is the enacted state statute rather than the model.

1.What the quantity term actually measures

Article 2 needs a quantity term for a sale-of-goods contract to be enforceable under its statute of frauds, but it does not need a number. A term that measures quantity by output or requirements supplies the quantity by reference to real-world behavior instead. The model text of the section is published by Cornell's Legal Information Institute at UCC 2-306.

Requirements contract

The buyer agrees to buy from this seller all of the goods the buyer needs for a stated purpose, plant, or period. The seller carries the risk that the buyer's need shrinks.

Output contract

The seller agrees to sell to this buyer everything the seller produces of a described good. The buyer carries the risk that production falls short, and the risk of an unexpected surge.

Two limits ride along with the number. The first is good faith, which polices the reason behind a change in volume. The second is the disproportion cap, which polices the size of the gap between what was expected and what is now demanded or tendered. Both limits apply to whichever party controls the quantity.

2.Why an open quantity is not illusory

A promise to buy "as much as I feel like buying" would be illusory. It is not a promise at all, and it furnishes no consideration. Older cases sometimes struck such arrangements down for exactly that reason. Section 2-306 solves the problem by reading the good faith limit into the quantity term. The buyer is not free to order nothing on a whim. It is bound to order what it genuinely requires, measured honestly. A real constraint is a real obligation, and a real obligation is consideration.

The practical consequence is that a buyer with a live, unchanged business cannot simply stop ordering because a competitor quoted a better price. That is a bad faith reduction, not an absence of requirements. The general doctrine of consideration and formation sitting behind this is summarized in Cornell's contract overview, and the sales article itself is collected at UCC Article 2.

The same reasoning explains why the contract survives when a purchase order and an acknowledgment carry different boilerplate. The quantity term comes from the parties' agreement, not from whichever form arrived last. The separate fight over which side's fine print governs is treated in battle of the forms.

3.Good faith cuts compared with bad faith demands

Courts treat reductions and increases differently, and that asymmetry is the single most useful thing to know about these contracts.

A buyer that closes a plant, discontinues a product line, or goes out of business may generally reduce its requirements to zero without breaching, so long as the decision is a genuine business decision rather than a maneuver aimed at the contract. The reasoning is that a requirements contract allocates the risk of demand, and a business that has stopped needing the goods has no requirements to state. Courts have been noticeably more willing to accept a good faith shutdown than a good faith surge.

A reduction made to escape a price that has moved against the buyer is a different matter. If the buyer still needs the goods and is quietly buying them somewhere else, the reduction is not in good faith whatever it is labeled. Curtailing purchases under a fixed-price contract because the spot market fell is treated as a breach in most jurisdictions.

Caution: The disproportion cap in the second half of 2-306(1) speaks in terms of what may be "tendered or demanded," and courts have divided over whether it limits decreases as strictly as increases. Some read the good faith clause alone as governing reductions; others apply the disproportion language in both directions. Because Article 2 is enacted state by state, the answer turns on the governing state's decisions, and the split remains unresolved as of mid-2026.

Increases draw tighter scrutiny for an obvious reason. A demand far above expectations can force a seller to buy on the open market at a loss in order to fill it. A buyer that suddenly demands many times its historical volume — because the contract price looks attractive, or because it wants inventory to resell — is normally outside the section even if the stated need is technically real.

4.Estimates, prior volumes, and the disproportion limit

A stated estimate changes the analysis more than any other drafting choice. Where the contract names an estimate, the disproportion cap is measured against that number. Where it does not, the cap is measured against normal or otherwise comparable prior output or requirements. A brand-new buyer with no history and no estimate leaves a court with very little to work with, which is by itself a reason to state one.

An estimate is not a minimum and not a maximum. A party that wants a hard floor or ceiling has to say so in words. But an estimate is strong evidence of what the parties expected, and the further a demand departs from it, the harder the departing party's good faith explanation has to work. Some courts treat a modest departure as unremarkable and reserve the disproportion analysis for large swings. Others police the estimate closely. The strictness genuinely varies from state to state, which is why the same facts can produce different outcomes across a state line.

Prior volumes do more work than drafters expect. Where a supply relationship has run for years, the course of performance between the parties tends to define what "normal" means, and a sudden departure from an established pattern invites scrutiny even if nothing in the writing was violated. This matters in commodity and agricultural supply chains in particular, where volumes swing for reasons nobody controls; related protections for growers and sellers are covered in agricultural liens and commodity payment protections.

5.Exclusive dealing and the best efforts obligation

Section 2-306(2) addresses a related arrangement. In a contract for exclusive dealing in a kind of goods, unless the parties otherwise agree, the section imposes an obligation on the seller to use best efforts to supply the goods and on the buyer to use best efforts to promote their sale. The obligation runs both directions, which parties routinely forget when they negotiate exclusivity as a one-sided favor.

Exclusivity and open quantity often appear together — a distributor that must buy all its requirements from one supplier and may not carry a competing line. The clauses interact. Exclusivity strengthens the argument that a reduction to near zero is bad faith, because the buyer has taken the supplier off the market and is the supplier's only route to it. Distribution and exclusivity arrangements can also raise competition questions, and general compliance material for businesses is published by the Federal Trade Commission.

Because Article 2 is a uniform act rather than a federal statute, the enacted version and the accompanying official comments differ in detail across states, and adoption history is not identical everywhere. The current status of each uniform act is tracked by the Uniform Law Commission, and the model text is collected in Cornell's UCC library. Reading the model is a starting point. The enacted section and that state's decisions are what govern a dispute.

6.Questions this raises

Does a requirements contract bind the buyer at all if it never states a number?

Yes. Section 2-306 treats the buyer's actual good faith requirements as the quantity, which is a definite enough obligation to be enforced and to serve as consideration. The buyer cannot order zero simply because it prefers to. It can order zero only if it genuinely has no requirements, for a real business reason. That is the whole difference between an open quantity term and an illusory promise.

Can a seller expand production and force the buyer to take everything it makes?

Generally no. The output is measured in good faith and is capped by the disproportion limit, so a seller that builds new capacity and tenders a volume far above the stated estimate or its normal prior output will usually find the excess refusable. The buyer takes the ordinary ups and downs of the seller's production, not a deliberate expansion aimed at the contract price.

What happens to the contract when the buyer's business is sold?

It depends on the assignment terms and on what the new owner does. Requirements are measured by the operating business the contract described, so a successor that keeps the same operation generally inherits the same measure. A successor that consolidates the work into a different facility, or shrinks the line, may reduce its requirements in good faith. Purported assignments that change the seller's risk are often restricted by the agreement itself.

Is a take-or-pay commitment still a requirements contract?

Not really, and that is often the point. A take-or-pay term sets a firm floor: the buyer either takes the stated volume or pays for it anyway. That converts part of the quantity from an open, good faith measure into a fixed obligation, which removes the disproportion argument for that portion. Many supply agreements combine a firm floor with an open tier above it.

Does the section apply to services or software subscriptions?

Article 2 governs transactions in goods, so a pure services arrangement is outside it. Courts usually apply a predominant purpose test to mixed deals, asking whether the transaction is mainly for goods or mainly for services. Software licensing has produced inconsistent results across states. Where Article 2 does not apply, common law principles of good faith and definiteness normally lead to a similar analysis, though not identical rules.

7.Drafting and administering the contract

Most litigation over these contracts is avoidable. The disputes cluster around a small set of terms the parties never settled, and each one has a standard fix. Work through them in the order below when negotiating a supply agreement, and revisit them whenever the volume pattern shifts.

• A stated estimate, with a clear statement that it is an estimate rather than a commitment.
• A collar — a minimum and a maximum per period — so that neither side is guessing about the disproportion limit.
• A rolling forecast obligation, with a required notice period before a material change in expected volume.
• A definition of what counts as a permitted reduction, naming plant closures, product discontinuation, and regulatory change if those risks are real.
• A price adjustment or index mechanism, so that a price swing does not create the incentive to breach in the first place.
• Express treatment of exclusivity, including whether either party owes best efforts and what that means here.
• A governing law clause, because the strictness of the disproportion limit varies by state.

Volume risk and liability risk are traded together, so the quantity term should be read alongside the remedy provisions described in limiting liability, caps, carve-outs, and consequential damages waivers, and alongside the exit rights covered in termination for convenience compared with termination for cause. When a dispute does reach a court, general information about federal civil procedure is available from the federal judiciary, though the substantive rule applied will still be the enacting state's version of Article 2.