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Frustration of Purpose

15 January, 2016 - 09:33

If the parties made a basic assumption, express or implied, that certain circumstances would not arise, but they do arise, then a party is discharged from performing his duties if his principal purpose in making the contract has been “substantially frustrated.” This is not a rule of objective impossibility. It operates even though the parties easily might be able to carry out their contractual duties. The frustration of purpose doctrine comes into play when circumstances make the value of one party’s performance virtually worthless to the other. This rule does not permit one party to escape a contract simply because he will make less money than he had planned or because one potential benefit of the contract has disappeared. The purpose that is frustrated must be the core of the contract, known and understood by both parties, and the level of frustration must be severe; that is, the value of the contract to the party seeking to be discharged must be destroyed or nearly destroyed.

The classic illustration of frustration of purpose is the litigation that gave birth to the rule: the so-called coronation cases. In 1901, when King Edward VII was due to be crowned following the death of Queen Victoria, a parade route was announced for the coronation. Scores of people rented rooms in buildings that lined the streets of the route to watch the grand spectacle. But the king fell ill, and the procession was canceled. Many expectant viewers failed to pay, and the building owners took them to court; many lessees who had paid took the owners to court to seek refunds. The court declared that the lessees were not liable because the purpose of the contract had been frustrated by the king’s illness.

Supervening government regulations (though here different from illegality), floods that destroy buildings in which an event was to take place, and business failures may all contribute to frustration of purpose. But there can be no general rule: the circumstances of each case are determinative. Suppose, for example, that a manufacturer agrees to supply a crucial circuit board to a computer maker who intends to sell his machine and software to the government for use in the international space station’s ventilation systems. After the contract is made but before the circuit boards are delivered, the government decides to scrap that particular space station module. The computer manufacturer writes the circuit board maker, canceling the contract. Whether the manufacturer is discharged depends on the commercial prospects for the computer and the circuit board. If the circuit board can be used only in the particular computer, and it in turn is only of use on the space station, the duty to take the boards is discharged. But if the computer can be sold elsewhere, or the circuit boards can be used in other computers that the manufacturer makes, it is liable for breach of contract, since its principal purpose—selling computers—is not frustrated.

As before, the parties can provide in the contract that the duty is absolute and that no supervening event shall give rise to discharge by reason of frustration of purpose.


The obligations to perform under a contract cannot be dismissed lightly, but a person’s duty to perform a contract duty may be discharged if it becomes impossible or very difficult to do it. This includes impossibility, common-law impracticability, commercial impracticability under the UCC, and frustration of purpose.


  1. If it is possible to perform a contract, why might a party be excused because of frustration of purpose?
  2. What is the difference between impractical and impracticable?
  3. How would supervening government regulation be different from supervening illegality?