An express condition in contract law is a specific event the parties write into their agreement that must occur before one side’s duty to perform kicks in. If the event never happens, the duty never arises, and no one is in breach. That structure makes express conditions a precise risk-allocation tool, and it also explains why courts hold parties to the exact language they used.
How the Restatement Defines a Condition
The Restatement (Second) of Contracts defines a condition as an event, not certain to occur, that must happen before a contractual duty becomes due.1Open Casebook. Restatement (2d) Sections on Conditions Uncertainty is the essential feature. If the event were guaranteed, there would be no reason to condition anything on it.
Conditions come from one of two places. The parties themselves can write one into the contract, or a court can imply one to reach a fair result.2Open Casebook. Restatement (Second) of Contracts Section 226 The first is an express condition. The second is a constructive condition. Courts treat the two very differently once a dispute starts.
Express Condition Versus Promise
A promise creates a duty to do something. If a contractor promises to finish a project by June 1, they owe that performance, and missing the date can support a breach claim. An express condition creates no duty at all. It works as a gatekeeper: the other party’s duty activates only if the specified event occurs.
The consequences diverge sharply when things go wrong. Break a promise, and the other side can sue for damages. Fail to satisfy a condition, and nobody owes anything. The duty that hinged on the condition is discharged, and neither side has breached.3Open Casebook. Restatement (Second) of Contracts Section 225 People often assume a failed deal means someone is at fault. With a failed condition, that assumption is wrong.
Language That Creates an Express Condition
Enforceability turns on word choice. Courts look for clear trigger language showing that a duty depends on a specific event. The usual signals are “if,” “on condition that,” “provided that,” and “subject to.” Each tells a court the parties intended a prerequisite rather than a hopeful expectation.
When the language is ambiguous, courts favor the reading that avoids forfeiture for a party who has already performed or relied on the deal.4Open Casebook. Restatement (2d) Sections on Conditions – Section: Section 227 In practice, a vaguely worded clause is more likely to be read as a promise than as a condition. Drafters who want a condition have to be deliberate about it.
The Three Types of Express Conditions
Express conditions fall into three timing categories. The category matters because it determines who has to prove what if a dispute reaches court.
- Condition precedent. An event that must happen before the duty to perform arises. A financing contingency in a home purchase is the standard example. If the buyer cannot secure a loan, the obligation to close never comes into existence. The party claiming the duty was triggered has to prove the condition was satisfied.
- Condition subsequent. An event that extinguishes a duty that already exists. An insurance policy might require the policyholder to file a claim within 90 days; if the deadline passes without a filing, the insurer’s obligation is discharged. The party claiming discharge has to prove the condition occurred.
- Concurrent conditions. Events that must happen at the same time. A real estate closing is the common setting: the buyer delivers the purchase price at the same moment the seller delivers the deed. Neither side can claim the other breached without showing they were ready and willing to perform.
In litigation, the plaintiff typically must prove that all conditions precedent were met. The defendant carries the burden on any condition subsequent that would discharge their duty.
Strict Compliance Is the Rule
This is where express conditions differ most sharply from ordinary contractual duties. A regular duty can often be satisfied through substantial performance: the job was done well enough that the other side got essentially what they bargained for, even if minor details fell short. Express conditions get no such cushion. They require strict, literal compliance.
The reasoning is that express conditions reflect specific choices the parties made. Constructive conditions get some flexibility because a court is filling gaps and trying to be fair. When the parties themselves wrote the condition, courts enforce it as written. The Restatement makes this explicit: when parties have made an event a condition of their agreement, there is no softening standard of materiality that excuses non-occurrence.5Contracts Casebook. Performance I: Express Conditions
A buyer who conditions the duty to close on obtaining a mortgage at 6.5% interest is not required to close if the best available rate is 6.75%. The deviation is small; the condition still failed. If relief is available at all, it comes through equitable doctrines rather than any redefinition of what counts as compliance.5Contracts Casebook. Performance I: Express Conditions
Where Express Conditions Show Up
Most people first encounter express conditions as contingencies in real estate contracts or as approval clauses in commercial deals.
Financing and Appraisal Contingencies
A “subject to financing” clause makes the buyer’s duty to purchase contingent on securing a mortgage on specified terms. If the buyer cannot get approved, the condition fails, the closing duty never arises, and the buyer typically recovers the earnest money.
Appraisal contingencies operate the same way. The buyer’s obligation depends on the property appraising at or above the purchase price. Lenders base loan amounts on the lower of appraised value or purchase price, so a low appraisal can leave a gap the buyer would have to cover in cash. The contingency lets the buyer renegotiate, add cash, or walk away. Waiving it, which buyers sometimes do in competitive markets, means accepting the risk of being locked in even if the appraisal falls short.
Satisfaction Clauses
Commercial contracts often make payment depend on the client’s approval of the finished work. These clauses give the client leverage, but courts apply a reasonableness check. When it is practical to evaluate whether a reasonable person in the client’s position would be satisfied, courts prefer that objective standard over pure subjective judgment.6Open Casebook. Restatement (2d) Sections on Conditions – Section: Section 228 A client cannot reject adequate work on a whim and escape payment. Where the clause turns on personal taste or aesthetic judgment, courts allow more subjectivity, but the dissatisfaction still has to be genuine.
What Happens When a Condition Fails
When a condition does not occur, the dependent duty is discharged once the condition can no longer be satisfied.3Open Casebook. Restatement (Second) of Contracts Section 225 The deal ends, and the party whose duty was conditioned walks away without liability. No breach, no damages.
This clean exit is the point. A business that ties its payment obligation to receiving compliant deliverables is not stuck paying for work that missed the mark. A homebuyer whose purchase was contingent on financing is not forced to find alternative funding or forfeit the deposit. The condition kept a risk from turning into an obligation.
Recovering the Value of Work Already Done
The harder situation is when one party has already put in substantial effort before the condition fails. A contractor who completes preliminary work has no right to payment under the contract when the condition was never met. But courts may allow a claim for the reasonable value of services provided under the doctrine of quantum meruit, an equitable remedy that prevents unjust enrichment.7Legal Information Institute. Quantum Meruit
Recovery is not automatic, and courts have discretion over the amount. The claim sits outside the contract itself, which is why it can survive even when the contractual duty was never triggered.
When Courts Excuse a Failed Condition
Strict compliance is the default, not an absolute. Courts have developed several routes around it when rigid enforcement would produce results that are disproportionately harsh or fundamentally unfair.
Waiver
A party who benefits from a condition can voluntarily give it up. Waiver does not require consideration or reliance by the other side.5Contracts Casebook. Performance I: Express Conditions A buyer who lets an inspection contingency deadline pass and keeps moving toward closing has likely waived the right to invoke it later.
Waiver has limits. It applies mainly to conditions that are procedural, technical, or relatively minor within the deal. A party cannot waive a condition that goes to the heart of the agreed exchange. And a waiver made before the deadline, on a condition within the other party’s control, can be retracted with reasonable notice if the other side has not materially changed position in reliance.
Disproportionate Forfeiture
Courts can excuse a failed condition when enforcing it would cause a loss far out of proportion to the protection the condition was meant to provide. The Restatement frames it as a balancing test: the extent of the forfeiture weighed against the importance of the risk the condition was designed to guard against, and how much that protection would be undermined by excusing it.8Open Casebook. Restatement (Second) of Contracts Section 229
This relief applies only when the condition was not a material part of the agreed exchange. A court will not excuse a failed appraisal contingency, because appraised value goes directly to the deal’s core economics. But if a party filed a required notice two days late and strict enforcement would cost them tens of thousands of dollars in forfeited work, a court has discretion to excuse the technical failure. Rather than excusing the condition entirely, a court may simply extend the time for compliance if timing itself was not material to the bargain.8Open Casebook. Restatement (Second) of Contracts Section 229
The Prevention Doctrine
A party cannot sabotage a condition and then hide behind its failure. When one party’s breach materially contributes to the non-occurrence of a condition on one of their own duties, that non-occurrence is excused. The classic scenario involves a seller who agrees to pay a broker’s commission conditioned on the broker closing the deal, then goes around the broker to close directly with the buyer. The seller’s interference excuses the condition, and the commission is owed.
The prevention doctrine reflects the broader duty of good faith. Parties are expected to cooperate, not to exploit the structure of conditions to shed obligations they would otherwise owe. When a court finds deliberate prevention, it treats the condition as satisfied.