UCC gap fillers are the default rules in Article 2 of the Uniform Commercial Code that automatically supply missing terms in a contract for the sale of goods. If you and the other side agree to a deal but leave out the price, the delivery location, the payment timing, or similar details, these provisions step in so the contract still holds. Two conditions have to be met under UCC § 2-204: both parties intended a binding deal, and a court can find enough information to fashion a remedy if something goes wrong.1Cornell Law Institute. UCC 2-204 – Formation in General Gap fillers do the second half of that work.
The One Term Gap Fillers Cannot Supply
Quantity. A court can look at market rates to fill in a missing price or default to the seller’s warehouse for a missing delivery location, but it cannot invent a quantity. Without a number, there is no way to calculate damages, and the deal usually collapses. This is the term you need to nail down in writing every time.
There is one workaround. An output contract, where the seller agrees to sell everything it produces, or a requirements contract, where the buyer agrees to purchase everything it needs, ties quantity to real-world operations instead of a fixed number. Under UCC § 2-306, actual output or actual requirements supply the quantity term, measured in good faith. Neither side can abuse that flexibility by demanding or tendering an amount unreasonably out of proportion with any stated estimate or prior history.2Legal Information Institute. UCC 2-306 – Output, Requirements and Exclusive Dealings
Filling in a Missing Price
When a contract says nothing about price, UCC § 2-305 fills the gap with a reasonable price at the time of delivery.3Legal Information Institute. Uniform Commercial Code 2-305 – Open Price Term Courts typically look at market rates for comparable goods in the same industry and timeframe. If you are buying steel, the going rate for that grade on the delivery date becomes the benchmark.
Some contracts deliberately leave the price open by giving one party authority to set it later. That party has to act in good faith, meaning the number must reflect honest commercial judgment rather than an attempt to gouge or lowball. If the responsible party fails to set a price or sets it in bad faith, the other side can treat the contract as cancelled or fix a reasonable price independently.3Legal Information Institute. Uniform Commercial Code 2-305 – Open Price Term
One scenario catches people off guard. If both parties specifically intended that they would not be bound unless they agreed on a price, and they never reach agreement, there is no contract at all. In that situation the buyer must return any goods already received, or pay their reasonable value, and the seller must refund any payment already made.3Legal Information Institute. Uniform Commercial Code 2-305 – Open Price Term
Delivery Place, Method, and Timing
When a contract does not specify where the exchange happens, the default under UCC § 2-308 is the seller’s place of business. If the seller has no business location, the seller’s residence serves as the pickup point. There is a practical exception: if both parties know at the time of contracting that the goods are stored somewhere else, that location becomes the delivery point instead.4Legal Information Institute. Uniform Commercial Code 2-308 – Absence of Specified Place for Delivery
UCC § 2-307 requires all goods to be delivered in a single shipment unless the parties agreed otherwise or the circumstances justify breaking the order into batches.5Legal Information Institute. UCC 2-307 – Delivery in Single Lot or Several Lots Batch delivery is not assumed. It has to make sense given the size of the order, storage capacity, or other practical factors.
Timing is filled in under UCC § 2-309: if no delivery date is set, performance must occur within a reasonable time.6Legal Information Institute. Uniform Commercial Code 2-309 – Absence of Specific Time Provisions; Notice of Termination What counts as reasonable depends on context. Perishable produce demands faster turnaround than heavy industrial equipment that needs custom fabrication.
Who Bears Risk of Loss in Transit
One of the most expensive questions a silent contract leaves open is who absorbs the loss if goods are damaged or destroyed on the way. UCC § 2-509 provides a layered set of defaults depending on how the goods are being moved.7Legal Information Institute. UCC 2-509 – Risk of Loss in the Absence of Breach
- Shipment contracts, with no destination specified: risk passes to the buyer the moment the seller hands the goods off to the carrier. Once it is on the truck, it is the buyer’s problem.
- Destination contracts: if the contract requires delivery to a specific destination, risk stays with the seller until the goods arrive and are tendered to the buyer at that location.
- Goods held by a third party: when goods sit in a warehouse and are sold without being moved, risk shifts to the buyer on receipt of a negotiable document of title or when the warehouse acknowledges the buyer’s right to the goods.
- All other situations: if the seller is a merchant, risk does not pass until the buyer actually receives the goods. If the seller is not a merchant, risk passes on tender of delivery.
That merchant distinction matters more than it looks. A merchant seller bears the loss even after tendering delivery if the buyer has not physically taken possession. A non-merchant seller’s risk ends the moment they offer to hand over the goods, whether the buyer has picked them up or not.7Legal Information Institute. UCC 2-509 – Risk of Loss in the Absence of Breach If your contract is silent and goods are being shipped, make sure your insurance covers the gap until risk formally transfers.
Payment Timing and the Right to Inspect
When a contract is silent on payment, UCC § 2-310 requires the buyer to pay at the time and place where the goods are received, even if the seller shipped from a different location. No credit is assumed. If you want net-30 or net-60 terms, those have to be in the contract; otherwise, payment is due on receipt.8Legal Information Institute. Uniform Commercial Code 2-310 – Open Time for Payment or Running of Credit; Authority to Ship Under Reservation
Before paying, you generally have the right to inspect. UCC § 2-513 lets you examine a shipment at any reasonable place and time to confirm it matches the contract description. The exception is COD or payment against documents of title. Under those terms you pay first and sort out any defects afterward.9Legal Information Institute. Uniform Commercial Code 2-513 – Buyers Right to Inspection of Goods
When the Goods Themselves Fall Short
Even once gap fillers establish price, place, and timing, the goods still have to conform to whatever terms exist. UCC § 2-601 sets a strict standard known as the perfect tender rule: if the goods or the delivery fail to conform in any respect, the buyer can reject the entire shipment, accept the entire shipment, or accept some commercial units and reject the rest.10Legal Information Institute. UCC 2-601 – Buyers Rights on Improper Delivery Courts sometimes soften the rule when a defect is minor and curable, particularly in installment contracts, but the default position heavily favors the buyer.
Implied Warranties as Baseline Quality
Gap fillers also set quality expectations. When the seller is a merchant dealing in goods of that kind, UCC § 2-314 creates an implied warranty that the goods are merchantable: they pass without objection in the trade, are fit for their ordinary purpose, and conform to any labeling or packaging promises.11Legal Information Institute. UCC 2-314 – Implied Warranty: Merchantability; Usage of Trade Buy commercial-grade lumber from a lumber dealer and find it rotting, and that warranty is breached even if the contract never mentioned wood quality.
A second warranty kicks in under UCC § 2-315 when the seller knows you need the goods for a specific use and knows you are relying on the seller’s expertise to pick the right product.12Legal Information Institute. UCC 2-315 – Implied Warranty: Fitness for Particular Purpose Tell a chemical supplier you need a solvent that will not damage a particular plastic, and the supplier recommends one that melts it, and this warranty is breached even if the solvent works fine elsewhere.
Neither warranty is locked in. UCC § 2-316 lets sellers disclaim them, but the requirements are specific. To exclude merchantability, the disclaimer must use the word “merchantability” and be conspicuous if written. To exclude fitness for a particular purpose, the disclaimer must be in writing and conspicuous. Selling goods “as is” or “with all faults” excludes all implied warranties without needing specific language. If you inspected the goods, or refused to inspect when given the chance, you also lose warranty protection for defects the inspection should have revealed.13Legal Information Institute. UCC 2-316 – Exclusion or Modification of Warranties
Open-Ended Contracts and Termination
Some supply relationships involve ongoing deliveries with no fixed termination date, like a restaurant’s weekly produce orders from a wholesaler. UCC § 2-309 treats these open-duration contracts as valid for a reasonable time, and either party can terminate at will. The catch is reasonable notice before pulling the plug. An agreement that waives the notice requirement entirely is unenforceable if applying it would be unconscionable.6Legal Information Institute. Uniform Commercial Code 2-309 – Absence of Specific Time Provisions; Notice of Termination
Good Faith and the Interpretive Hierarchy
Every gap filler operates against a backdrop of good faith. UCC § 1-304 imposes an obligation of good faith on the performance and enforcement of every contract governed by the Code.14Legal Information Institute. Uniform Commercial Code 1-304 – Obligation of Good Faith A missing term is not an opening to extract an unfair advantage.
When a gap filler alone does not resolve ambiguity, courts turn to three interpretive tools under UCC § 1-303, in a specific order of priority.15Legal Information Institute. UCC 1-303 – Course of Performance, Course of Dealing, and Usage of Trade
- Course of performance: how the parties have behaved under this specific contract. If a buyer has accepted late deliveries without objection on five previous occasions under the same agreement, that pattern shapes expectations going forward.
- Course of dealing: the history of previous transactions between the same two parties. Ten prior deals with the same supplier on net-30 credit will fill the gap in the eleventh.
- Usage of trade: common practices in the relevant industry. If everyone in the wholesale flower business understands that “a case” means 24 bunches, that standard applies even if the contract does not define the term.
When these tools conflict, express contract terms always win. After that, course of performance beats course of dealing, and course of dealing beats usage of trade.15Legal Information Institute. UCC 1-303 – Course of Performance, Course of Dealing, and Usage of Trade What you actually did under this contract matters more than prior deals, which matter more than industry habit.
The Statute of Frauds Ceiling
Gap fillers have a practical limit. Under UCC § 2-201, a contract for the sale of goods priced at $500 or more needs some form of written evidence to be enforceable: a signed document indicating a deal was made. The writing does not have to be polished. A purchase order, email confirmation, or signed memo can satisfy the requirement, and it can omit or incorrectly state terms that gap fillers would otherwise supply. But the contract cannot be enforced beyond whatever quantity the writing specifies, reinforcing that quantity remains the one term the Code cannot manufacture on its own.16Legal Information Institute. UCC 2-201 – Formal Requirements; Statute of Frauds
For deals under $500, an entirely oral agreement can be enforceable with gap fillers supplying the missing terms. Above that threshold, something has to be in writing, though the writing itself can be bare-bones as long as it shows the parties intended a deal and states a quantity.