Frustration of Purpose

Frustration of purpose is a legal doctrine that releases parties from their obligations when a supervening event, not the fault of either party, eliminates the principal reason for which the agreement was made. The performance itself may still be physically possible, but the value of that performance to at least one party has been destroyed.

In domestic contract law, the doctrine is most often traced to the English "coronation cases," especially Krell v. Henry [1903] 2 KB 740, in which a room rented to view King Edward VII's coronation procession lost its purpose when the procession was cancelled due to the King's illness. U.S. courts apply a similar test, codified in the Restatement (Second) of Contracts § 265, which requires that:

• the frustrated purpose was a principal purpose of the contract,
• the frustration is substantial, and
• the non-occurrence of the frustrating event was a basic assumption on which the contract was made.

In public international law, the analogous concept is rebus sic stantibus ("things thus standing"), codified in Article 62 of the 1969 Vienna Convention on the Law of Treaties (VCLT). A fundamental change of circumstances may be invoked to terminate or withdraw from a treaty only when those circumstances constituted an essential basis of consent and the change radically transforms the extent of obligations still to be performed. The International Court of Justice applied a strict reading of Article 62 in the Gabčíkovo–Nagymaros Project case (Hungary/Slovakia), 1997, rejecting Hungary's invocation of changed circumstances.

The doctrine is distinct from impossibility (performance cannot be done) and impracticability (performance is excessively burdensome). Frustration of purpose presumes performance remains feasible but pointless. Courts and tribunals apply it narrowly to preserve the stability of agreements; foreseeable risks, ordinary market shifts, and self-induced changes generally do not qualify.