Module 3: Breach & Excuse

Not every breach is equal. Courts weigh several factors — often summarized from Restatement (Second) of Contracts § 241 — including how much of the expected benefit the injured party lost, whether money damages can adequately compensate that loss, how much the breaching party would forfeit if treated as in total breach, and how likely a prompt cure is.

The consequence matters a great deal: a material breach excuses the injured party’s own further performance and supports a claim for total breach. A minor breach only gives rise to a damages claim — the injured party generally must still perform their own side of the deal.

Example. John hires Peter to install 100 identical light fixtures throughout a new office building for $50,000. Peter finishes the job, but 2 of the 100 fixtures are the wrong finish (brushed nickel instead of the specified matte black). That’s a minor breach — John still substantially got what he bargained for, so he owes Peter the contract price minus the cost to fix those 2 fixtures. Now compare: Peter walks off the job after installing only 10 fixtures and never returns. That’s a material breach — John lost the core benefit of the deal, so he can hire someone else and sue Peter for the full cost of finishing the work.

When a party makes a clear, unequivocal statement or takes a clear action showing they won’t perform — before performance is even due — the other side doesn’t have to wait around. They can treat it as an immediate breach, stop their own performance, and sue right away, or instead wait a reasonable time to see if the repudiating party retracts.

Example. Peter has agreed to deliver custom cabinets to John on August 1st. On July 1st, Peter emails John: “I’m not making your cabinets — I took a bigger job instead.” John doesn’t have to wait until August 1st to see if Peter shows up. He can treat Peter’s email as an immediate breach right now, hire another cabinet maker, and sue Peter for the difference — or he can wait a reasonable time in case Peter changes his mind, without losing his own right to sue later.

Impossibility applies when performance literally cannot happen anymore — the unique subject matter is destroyed, for instance. Commercial impracticability (UCC § 2-615) is broader: performance is still technically possible, but an unforeseen event has made it extremely and unreasonably difficult or costly — ordinary price fluctuation generally doesn’t qualify, since that’s a foreseeable business risk. Frustration of purpose is different again: performance is still fully possible, but a supervening event has destroyed the entire reason one party wanted the deal in the first place.

Example. Peter agrees to sell John a one-of-a-kind antique painting. Before delivery, the painting is destroyed in a fire — that’s impossibility, since no substitute exists. Now imagine instead Peter agreed to supply John with a specific raw material, and a sudden war cuts off the only viable source, tripling the cost far beyond ordinary market risk — that could be commercial impracticability. Finally, imagine John rented a rooftop venue specifically to watch a parade, and the parade is cancelled — John can still legally use the rooftop, but the entire point of renting it is gone, which is frustration of purpose.

Especially in construction-type contracts, a party who has performed in good faith and come close to full compliance — even with some defects — may still recover the contract price, minus damages for whatever falls short, rather than being treated as having committed a total breach. This doctrine exists to avoid the harshness of an all-or-nothing rule for honest, substantially-complete work.

Example. Peter builds John a house under a contract calling for a specific brand of copper pipe. Peter, acting in good faith, installs a different brand of copper pipe that is functionally identical and just as good. Rather than letting John refuse to pay anything at all, substantial performance lets Peter recover the contract price minus whatever small amount, if any, John was actually damaged by the substitution — for example, the trivial cost difference, not the cost of ripping out and replacing every pipe in the house.

Sometimes a contract goes wrong not because anyone breached it, but because it was built on a false assumption. A mutual mistake — both parties wrong about a basic assumption underlying the deal — can make the contract voidable by the party it hurts, if the mistake has a material effect on the exchange and that party didn’t bear the risk of being wrong (for example, by agreeing to buy something “as is,” uncertainty and all).

A unilateral mistake — only one party was wrong — is much harder to get relief for, since the other side reasonably relied on the deal as stated. Courts generally require that the non-mistaken party knew or should have known of the error, or that enforcing the contract as written would simply be unconscionable.

Example. Peter agrees to sell John a plot of land, and both Peter and John believe the land has no mineral rights attached — it turns out the land actually does, which substantially changes its value, and neither of them agreed to bear that risk of being wrong. That’s a mutual mistake, and Peter (the party hurt by the mistake, if he sold too cheap not knowing about the rights) could seek to avoid the deal. Now compare: Peter alone privately misjudges the value of an antique he’s selling John, while John had no reason to know Peter was wrong. That’s a unilateral mistake, and Peter will have a much harder time getting out of the deal, since John reasonably relied on the price as stated.

These defenses target how a contract came about, not just whether it was performed.

• Duress is an improper threat that leaves the victim no reasonable alternative but to agree — it can be physical (threatening violence) or purely economic (threatening to breach an existing deal unless the victim agrees to unfavorable new terms, with no reasonable alternative available).
• Undue influence is unfair persuasion of a party who’s under the domination of another, or whose relationship of trust and confidence with the other party is exploited — think of a caretaker pressuring an elderly, dependent client.
• Misrepresentation is a false assertion of fact that induces the other party’s assent. It’s fraudulent if made knowingly or recklessly, and merely innocent or negligent otherwise — but either kind can support avoiding the contract if the misrepresentation was material to the deal.

Example. John already owes Peter money under an existing supply contract. John tells Peter, “pay me an extra $5,000 right now, or I’ll simply stop shipping the goods you desperately need for tomorrow’s deadline, and you have no time to find another supplier” — that improper threat, with no reasonable alternative for Peter, is economic duress. Now compare: Peter’s elderly, dependent uncle relies on Peter for daily care, and Peter pressures him into signing over valuable property using that dependent relationship — that’s undue influence. Finally, if John sells Peter a car while knowingly lying that it “has never been in an accident,” that false statement of fact is fraudulent misrepresentation.