Trade usage, dealing, and omitted terms

Three Sources, One Order: Which Practice Wins

When contract meaning is disputed, distinguish course of performance, course of dealing, and usage of trade, then apply their order of authority. The hierarchy to memorize is principally the UCC rule in UCC 1-303:

1. Express terms prevail over all three contextual sources when the terms cannot reasonably be read consistently with them.
2. Course of performance prevails over course of dealing and usage of trade.
3. Course of dealing prevails over usage of trade.

The court first tries to construe all sources consistently. The hierarchy operates only when consistency is unreasonable. Thus, an ordinary course of dealing does not automatically defeat a trade usage; it does so only when the two cannot coexist.

The three sources are separated by the transaction from which the evidence comes:

Course of performance is the near-miss most often confused with course of dealing. Performance concerns repeated occasions under the current contract. The parties must have an opportunity to object, and conduct accepted or acquiesced in without objection is especially powerful. Two monthly deliveries under the contract may establish course of performance; three earlier contracts do not.

Course of dealing concerns conduct under prior transactions between the same parties. It is not necessary that the earlier transactions contain identical written contracts, but the conduct must establish a common basis for understanding their expressions and other conduct.

Usage of trade is not merely what one witness says is customary. Under UCC 1-303, it is a practice or method of dealing having such regularity of observance in a place, vocation, or trade as to justify an expectation that it will be observed. The relevant party must know or reasonably be expected to know the usage. A practice followed by the parties may be course of performance or course of dealing and may also qualify as usage of trade if it has the required regularity of observance in the relevant place, vocation, or trade.

Under common law, there is no statutory UCC-style ranking among these three sources. They may help determine meaning or supplement an agreement, and accepted performance is generally given great interpretive weight, but do not mechanically import the Article 2 hierarchy into a services or land contract. For a hybrid contract, use the governing-law direction supplied by the problem. This is closed-book: memorize the three definitions and the order express terms, performance, dealing, usage.

The Missing Term: When a Court or Code Fills the Gap

An omitted term is not automatically fatal. The first question is whether the parties made a binding contract while leaving a term unexpressed. The second is whether the governing law supplies a sufficiently definite standard.

At common law, Restatement (Second) of Contracts §204 supplies the controlling rule: when parties have made a binding contract but have not agreed on an essential term, the court supplies a term that is reasonable in the circumstances. The court is filling an omission, not making the bargain for the parties.

Apply three limits:

1. The parties must have intended to be bound.
2. The agreement must provide enough basis to determine breach and an appropriate remedy.
3. The proposed term must be reasonable under the circumstances.

A court will not fill a gap when the parties made agreement on that term a condition of being bound. “We will be bound only if we later agree on the price” is a failed future agreement, not an ordinary omitted term. Likewise, if the language and circumstances provide no objective basis for determining what either party promised or what remedy follows, the apparent agreement is too indefinite. The near miss is important: silence after a binding agreement invites a supplied reasonable term; a stated intention not to be bound until later agreement defeats gap filling.

Article 2 is more liberal. Under UCC 2-204(3), a sale-of-goods contract does not fail merely because one or more terms are left open if the parties intended to contract and there is a reasonably certain basis for giving an appropriate remedy. Article 2 therefore supplies several specific defaults:

• Price: Under UCC 2-305, if the parties intended to be bound but omitted price, the price is generally a reasonable price at the time of delivery. The same result applies when the parties left price to later agreement but failed to agree, or when an agreed pricing mechanism failed. The exception is a stated intention not to be bound unless price is fixed or agreed. A party authorized to fix price must act in good faith.
• Quantity: Quantity is different. Article 2 ordinarily needs an objective quantity basis. An output or requirements contract may supply quantity under UCC 2-306, but the output or requirements must be in good faith and cannot be unreasonably disproportionate to a stated estimate or comparable prior output or requirements. If there is no quantity and no objective output, requirements, or other measure, a court ordinarily cannot invent the amount of goods.
• Time for performance: If the contract does not specify when performance is due, UCC 2-309 supplies a reasonable time.
• Payment: If the contract does not specify payment timing, UCC 2-310(a) generally makes payment due at the time and place where the buyer receives the goods, even though the contract may authorize shipment.

Before applying a default rule, examine the three contextual sources. A course of dealing, course of performance, or usage may establish what the parties meant by an otherwise omitted term. If those sources do not establish a different meaning, the statutory gap filler supplies the result. The fact that a term is economically important does not itself prevent a UCC gap filler.

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The flowchart addresses the central fork, not every Article 2 default. If the omitted goods term is something other than quantity, Article 2 may supply a price, time, or payment term even though the quantity itself must still have an objective basis.

The Decisive Fact Pattern: Ranking and Filling Together

Northstar and Mill signed a contract for 1,000 bags of flour at a stated price, with monthly deliveries.
The contract said nothing about when Northstar had to pay.
In three earlier sales, Northstar paid within 10 days after delivery, and Mill accepted that practice.
Under the current contract, Northstar paid 45 days after each of the first two deliveries, and Mill accepted both payments without objection.
The local flour trade generally uses payment within 30 days.

Recurring errors:

• Calling the three earlier flour sales course of performance ignores that performance must occur under the current contract.
• Treating the 30-day industry practice as controlling ignores the lower rank of usage of trade.
• Treating silence about payment as fatal ignores UCC 2-310(a).
• Treating an express price as an express payment term confuses two different subjects of the agreement.
• Assuming one accepted payment establishes course of performance ignores the requirement of repeated occasions and opportunity to object.

Three Fast Calls: Separate the Near Misses

High-Yield Points - ⚡ Biggest Takeaways

Under UCC 1-303, rank express terms, course of performance, course of dealing, then usage of trade. Performance means repeated conduct under this contract; dealing means prior transactions; usage means regular industry or trade practice. Supply a reasonable common-law term only after finding a binding contract; under Article 2, apply the specific gap filler.