Doctrine of Supervening Impossibility: Meaning, Application, Effects, and Suggestions
Author: Md. Kibria Nur
Student, Southern University Bangladesh
—————————————————————————————————————-
3 Quick Takeaways
1. Under Section 56 of the Indian Contract Act, 1872, a contract becomes void when its performance becomes impossible or unlawful due to an event that neither party could have prevented or foreseen at the time of entering the contract.
2. The doctrine does not cover every difficulty — increased cost, commercial loss, strikes, or the failure of a third party do not discharge a contract. Impossibility must be genuine and absolute.
3. When a contract is discharged under this doctrine, any advantage already received must be restored under Section 65 of the Act — the law does not allow one party to retain a benefit from a contract that no longer exists.
Introduction
Contractual obligations are founded on the principle that agreements lawfully entered into must be performed. However, circumstances may arise after the formation of a contract that make its performance impossible or unlawful without the fault of either party. To address such situations, the law recognises the Doctrine of Supervening Impossibility, also known as the Doctrine of Frustration. This doctrine operates as an exception to the rule of absolute contractual liability. This article discusses the meaning of supervening impossibility, the circumstances in which the doctrine applies, its legal effects, and concludes with suggestions for contractual parties and legislators.
What is Supervening Impossibility?
The term “supervening impossibility” refers to a situation where a contract, at the time it was entered into, was capable of being performed, but subsequently becomes impossible to perform.
Section 56, paragraph 2 of the Indian Contract Act, 1872 provides that a contract to do an act which, after the contract is made, becomes impossible — or, by reason of some event which the promisor could not prevent, becomes unlawful — shall become void when the act becomes impossible or unlawful.
Where an event that could not reasonably have been in the contemplation of the parties at the time of contracting renders performance impossible or unlawful, the contract becomes void and stands discharged. This is the doctrine of supervening impossibility. The rationale is straightforward: if performance becomes impossible due to a supervening event or illegality, it is logical to absolve the parties from further obligation, since they never promised to perform an impossibility.
For the doctrine to apply, three conditions must be satisfied:
- The act must have become impossible to perform.
- The impossibility must arise from an event which the promisor could not have prevented.
- The impossibility must not be self-induced by the promisor or caused by his own negligence.
Where Does the Doctrine Apply?
A contract may be discharged on the ground of supervening impossibility in the following circumstances.
- Destruction of Subject-Matter
When the subject-matter of a contract is destroyed after its formation, without the fault of either party, the contract is discharged. The continued existence of the subject-matter is treated as an implied condition of performance.
- Failure of Ultimate Purpose
Where the ultimate purpose for which the contract was entered into fails, the contract may be discharged — even if no property has been destroyed and literal performance remains technically possible.
In Krell v. Henry [1903] 2 KB 740, H hired a room from K in London to view the coronation procession of King Edward VII on a specific date. The King’s illness caused the procession to be postponed. H could still go to the room and sit there, but the entire purpose of the contract — viewing the procession — had been defeated. The court held that H was not liable to pay rent, as the contract had been discharged on the failure of its ultimate purpose.
- Death or Personal Incapacity
Where performance depends on the personal skill, qualification, or existence of a specific person, the contract is discharged upon the death, illness, or incapacity of that person.
- Change of Law
A subsequent change in law may render a contract illegal, in which case it is deemed discharged. The law may directly prohibit the act contracted for, or may remove from the promisor’s control something in respect of which he had contracted to act.
Outbreak of War
Contracts entered into with an alien enemy during war are illegal and void from the outset. Contracts entered into before the outbreak of war are suspended for the duration of the war and may be revived thereafter, provided they have not become time-barred. If war is declared between the countries of the contracting parties, the contract is suspended during the war. If war is declared between the country of one party and a third country, the contract remains binding — and any difficulty in performance caused by disruption of transport or similar factors is treated as difficulty of performance only, not a ground for discharge.
What the Doctrine Does Not Cover
Unless performance becomes absolutely impossible, a party remains bound to perform its contractual obligations. The mere fact that performance has become more difficult, more expensive, or less profitable does not constitute supervening impossibility.
- Difficulty of Performance: Increased or unexpected difficulty and expense do not excuse a party from performance.
- Commercial Impossibility: When profits fall sharply or a loss becomes likely — due to a rise in raw material prices or increased labour costs, for instance — this is regarded as commercial impossibility. It does not discharge a contract.
- Default of a Third Party: The doctrine does not apply where the contract could not be performed due to the failure of a third party on whom the promisor relied.
- Strikes and Lock-outs: A strike by workers or a lock-out by an employer does not excuse performance. Where impossibility is not absolute, or where it arises from the promisor’s own default, Section 56 does not apply.
- Failure of One of Several Objects: Where a contract is entered into for multiple purposes, the failure of one does not discharge the whole contract.
This principle was illustrated in Herne Bay Steam Boat Co. v. Hutton [1903] 2 KB 683. A company agreed to hire a boat to H for two purposes: to view the naval review on the occasion of King Edward VII’s coronation, and to sail around the assembled fleet. The naval review was cancelled due to the King’s illness, but the fleet remained assembled. The court held that the contract was not discharged, because the naval review was not the sole purpose of the contract. Sailing around the fleet — an equally central object — remained capable of being fulfilled.
Effects of Supervening Impossibility
When the doctrine applies, two principal legal consequences follow.
First, when performance of a contract becomes subsequently impossible or unlawful, the contract becomes void under Section 56 of the Indian Contract Act, 1872.
Second, under Section 65 of the Act, when a contract becomes void, any person who has already received an advantage under it must restore that advantage, or make compensation for it, to the person from whom it was received. The law does not permit a party to retain a benefit from a contract that no longer has any legal force.
Suggestions
Two practical suggestions emerge from an examination of this doctrine.
First, contracting parties would be well advised to include carefully drafted force majeure clauses in their agreements. Such clauses expressly allocate the risk of unforeseen events — natural disasters, government action, epidemics, and similar occurrences — and can provide clarity on what happens to obligations and payments if performance becomes impossible. Relying on the courts to imply discharge through the doctrine of supervening impossibility introduces uncertainty that clear contractual drafting can avoid.
Second, parties should familiarise themselves with their rights and obligations under the contract before disputes arise. Understanding the scope of Section 56 and the conditions under which a contract may be discharged can help parties respond appropriately when unexpected events occur, rather than continuing to perform under a contract that may already be void — or, equally, abandoning obligations that the doctrine does not in fact excuse.
Conclusion
The Doctrine of Supervening Impossibility is an important principle in balancing contractual sanctity with fairness. It prevents injustice where performance becomes impossible due to unforeseen and uncontrollable events. However, its application must remain limited to genuine cases of impossibility, in order to maintain commercial certainty and contractual discipline. Proper drafting, judicial prudence, and legislative clarity can ensure that the doctrine continues to serve its true purpose in modern contract law.
** Disclaimer: The views expressed in this article are those of the author and do not necessarily reflect the views of The Lawscape.
The Lawscape — clear, practical legal insight for students and future lawyers.