Also known as: fundamental breaches of contract · material breach · repudiatory breach
Written by attorneys · grounded in primary & secondary sources — see below
A serious failure to perform a contractual obligation that substantially deprives the injured party of the benefit it reasonably expected under the agreement. The breach allows the injured party to treat the contract as terminated and pursue remedies for total breach rather than mere damages for partial breach.
Marta, the CFO of Aurora Films, discovers that a producer has repeatedly charged personal travel as production costs on a tax-incentivized project. She corrects the entries internally but never reports the issue to the CEO or board. The producer's conduct amounts to a fundamental breach of duty to the corporation, triggering the officer's reporting obligation under the statute.
Rotorex ships air conditioner compressors to Delchi that fail to meet the required cooling capacity and energy consumption specifications. Delchi cannot use the units for its intended product line and must cover at higher cost. The nonconformity constitutes a fundamental breach because it deprives Delchi of the essential performance benefit it reasonably expected.
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A fundamental breach under the CISG or equivalent standards allows avoidance when the breach substantially deprives the injured party of its expected benefit, whereas a lesser material breach may only support damages or suspension pending cure. The distinction turns on the severity of the deprivation and the foreseeability of the loss to the breaching party.
Courts examine the extent to which the injured party is deprived of the benefit reasonably expected, the likelihood of cure, and whether time is of the essence in the transaction. Repeated missed just-in-time deliveries combined with vague assurances of future performance can establish a fundamental breach when they undermine the core commercial purpose of the contract.
Once the breach is fundamental and the injured party has reasonably treated the contract as avoided and covered, subsequent tender or cure does not revive the breaching party's right to perform. The injured party may still recover damages for total breach.
…the increased prices. Consequently, any refusal by the plaintiffs to pay the price increase sought by Sharon must be viewed as a material breach of the November, 1972 contract which would excuse Sharon from any further performance. Thus, Sharon reasons that its refusal to perform absent a price increase was justified under the…