Impracticability is said to exist when there is a radical departure from the circumstances that the parties reasonably contemplated would exist at the time they entered into the contract; on such facts, the courts might grant relief. They will do so when extraordinary circumstances (often called “acts of God” or “force majeure”) make it unjust to hold a party liable for performance. Although the justification for judicial relief could be found in an implied condition in all contracts that extraordinary events shall not occur, the Restatement eschews so obvious a bootstrap logic and adopts the language of UCC Section 2-615(a), which states that the crux of the analysis is whether the nonoccurrence of the extraordinary circumstance was “a basic assumption on which the contract was made.” 1 If it was—if, that is, the parties assumed that the circumstance would not occur—then the duty is discharged if the circumstance later does occur.
In one well-known case, Autry v. Republic Productions, the famous cowboy movie star Gene Autry had a contract to perform to the defendant. He was drafted into the army in 1942; it was temporarily, at least, impossible for him to perform his movie contractual obligations incurred prior to his service. When he was discharged in 1945, he sued to be relieved of the prewar obligations. The court took notice that there had been a long interruption in Autry’s career and of “the great decrease in the purchasing power of the dollar”—postwar inflation—and determined that to require him to perform under the old contract’s terms would work a “substantial hardship” on him. A world war is an extraordinary circumstance. The temporary impossibility had transformed into impracticability. 2
Impracticability refers to the performance, not to the party doing it. Only if the performance is impracticable is the obligor discharged. The distinction is between “the thing cannot be done” and “I cannot do it.” The former refers to that which is objectively impracticable, and the latter to that which is subjectively impracticable. That a duty is subjectively impracticable does not excuse it if the circumstances that made the duty difficult are not extraordinary. A buyer is liable for the purchase price of a house, and his inability to raise the money does not excuse him or allow him to escape from a suit for damages when the seller tenders the deed. 3 If Andy promises to transport Anne to the football stadium for ten dollars, he cannot wriggle out of his agreement because someone smashed into his car (rendering it inoperable) a half hour before he was due to pick her up. He could rent a car or take her in a taxi, even though that will cost considerably more than the sum she agreed to pay him. But if the agreement was that he would transport her in his car, then the circumstances make his performance objectively impracticable—the equivalent of impossible—and he is excused.