Consequential damages under California law are the secondary losses that flow from a breach of contract, beyond the direct value of what the contract promised. If a contractor finishes your restaurant two months late, the direct damages are the overpayment or the cost to fix the work; the consequential damages are the profits you lost during those two months, the spoiled inventory, the wasted marketing spend, and the payroll for staff you hired for an opening that didn’t happen. California Civil Code § 3300 sets the rule: a party injured by a breach can recover all detriment proximately caused by it, plus the harm that would ordinarily follow.1California Legislative Information. California Code CIV 3300 That second category is where consequential damages sit, and they often exceed the value of the contract itself.
Consequential, Direct, and Incidental Losses
The three categories serve different purposes. Direct damages compensate for the shortfall in what was promised. Incidental damages cover the administrative cost of dealing with the breach itself: inspection, shipping and storage of rejected goods, and reasonable expenses in finding a replacement supplier under California Commercial Code § 2715(1). Consequential damages are the broader economic harm the breach causes downstream. Under § 2715(2), those include any loss tied to needs the seller had reason to know about when the contract was signed, plus personal injury or property damage from breach of warranty.2Legal Information Institute (LII). UCC 2-715 Buyer’s Incidental and Consequential Damages
A worked example: a supplier delivers defective parts and your production line shuts down for a week. The cost of finding a substitute supplier is incidental. The revenue you lost while the line was down is consequential. The distinction matters because many contracts exclude consequential damages while leaving incidental damages alone. Which bucket your loss falls into decides whether an exclusion clause blocks it.
What You Have to Prove
Three requirements decide whether a consequential damages claim survives: foreseeability, causation, and reasonable certainty. Courts are skeptical of speculative recovery, so the quality of your evidence carries most of the weight.
Foreseeability at the Time of Contracting
The breaching party must have had reason to foresee the type of loss as a probable result of a breach, given what both sides knew when they signed. The exact dollar figure doesn’t need to have been predictable, but the general nature of the harm does. Tell your software vendor that your business runs entirely on their platform and that an outage will halt operations, and lost revenue from an outage becomes foreseeable. Say nothing about the dependency, and the same loss may fall outside recovery.
Pre-contract communications drive this analysis. Emails, meeting notes, and scope documents describing your particular needs build the record courts use to decide what the other side knew when the deal was made.
Causation
You have to show a direct causal link. California requires proximate cause, meaning the breach was a substantial factor in producing the harm.1California Legislative Information. California Code CIV 3300 If your business was already sliding before the breach, expect the defense to attribute the losses to market conditions or your own decisions. Financial records that show a clean before-and-after picture make that argument harder to sustain.
Reasonable Certainty
California does not award speculative damages. Civil Code § 3359 requires damages to be reasonable, and California courts consistently hold that lost profits and other consequential losses must be proven with reasonable certainty as to both occurrence and amount.3Justia. CACI No. 3903N Lost Profits (Economic Damage) Mathematical precision isn’t required, but a reasonable basis for the calculation is.
Established businesses have the easier road: historical revenue, margins, and seasonal patterns let an expert project what would have happened absent the breach. New businesses can still recover, but they need industry data, comparable-company evidence, and expert analysis of the venture’s critical success factors. The rule is best available evidence rather than optimistic projections.3Justia. CACI No. 3903N Lost Profits (Economic Damage)
Contract Clauses That Limit or Exclude Recovery
Most sophisticated commercial contracts include a clause capping or excluding consequential damages. California generally enforces these provisions, with meaningful exceptions.
California Commercial Code § 2719 lets parties shape their own remedies, including limiting a buyer’s recovery to repair or replacement of defective goods, or excluding consequential damages entirely. But the statute makes exclusions unenforceable if they’re unconscionable, and it splits consumer and commercial cases. For consumer goods, any limitation on consequential damages for personal injury is presumed unconscionable and invalid unless the seller proves otherwise. For purely commercial losses, the limitation is presumed valid unless the injured party proves it’s unconscionable.4California Legislative Information. California Code COM 2719 In a deal between businesses with comparable bargaining power, an exclusion is very likely to hold.
An exclusion can still unravel. Under § 2719(2), when a limited remedy “fails of its essential purpose,” the full range of Commercial Code remedies opens back up.4California Legislative Information. California Code COM 2719 The classic scenario: a contract limits the buyer to repair or replacement, and the seller keeps failing to fix the defect. At some point the remedy becomes illusory, and consequential damages come back into play.
Outside the Commercial Code, Civil Code § 1670.5 gives courts broad power to refuse enforcement of any unconscionable clause, strike it, or limit its application. Courts look at both the circumstances of formation (take-it-or-leave-it terms, fine print, no chance to negotiate) and the fairness of the clause itself (one-sidedness, whether it leaves the injured party with any real remedy).5California Legislative Information. California Code CIV 1670.5
Your Duty to Mitigate
California does not let you sit back and let losses pile up. Civil Code § 3358 caps recovery at what full performance would have delivered, and courts apply that principle to require active mitigation.6California Legislative Information. California Code CIV 3358 For sales of goods, mitigation often takes the form of “cover”: buying substitute goods from another source. Any consequential loss you could have reasonably prevented through cover or similar steps is not recoverable.2Legal Information Institute (LII). UCC 2-715 Buyer’s Incidental and Consequential Damages
The standard is reasonableness. You don’t have to accept a clearly inferior substitute, spend money you don’t have, or take extraordinary measures. The question is whether a prudent person in your position would have taken similar steps. The burden of proving you failed to mitigate sits with the breaching party.
How Defendants Fight These Claims
Expect the defense to attack the same three requirements you have to prove, plus mitigation.
Lack of foreseeability is the first line. If the defendant had no reason to know about the particular circumstances that made your losses likely, the losses weren’t foreseeable. A manufacturer selling a standard part has no reason to know your production depends on timely delivery unless you said so.
Intervening causes are the second. If an independent event between the breach and the alleged harm was unforeseeable and independently sufficient to cause the loss, the chain of causation breaks. A supplier’s late delivery matters less if a fire destroys the production line before the materials would have been used.
Speculative damages are the third and often the most effective. If your lost-profits projections rest on optimistic assumptions, ignore market headwinds, or lack supporting financial data, the defense will argue the number is too uncertain to award. Courts have wide discretion to exclude expert testimony they find insufficiently grounded.
Failure to mitigate is the fourth. If comparable goods or services were available and you made no effort to obtain them, the defendant isn’t responsible for the avoidable share of the harm.
Consumer Goods and the Song-Beverly Act
Consumers dealing with defective goods have a separate and often stronger route. California’s Song-Beverly Consumer Warranty Act, at Civil Code § 1794, lets a buyer harmed by a warranty violation recover consequential damages measured by the Commercial Code.7California Legislative Information. California Code CIV 1794 Rejected or revoked goods trigger recovery under Commercial Code §§ 2711 through 2713; kept goods trigger recovery under §§ 2714 and 2715, plus repair costs.8Justia. CACI No. 3243 Consequential Damages
Song-Beverly also adds pressure a standard contract claim doesn’t carry. If the seller’s failure to honor the warranty was willful, the court can impose a civil penalty of up to twice the actual damages on top of the compensatory award, and the buyer can recover attorney’s fees and costs.7California Legislative Information. California Code CIV 1794 For defective vehicles, electronics, and other consumer goods, that framework often beats a plain breach-of-contract theory.
How Long You Have to File
Written contracts carry a four-year statute of limitations in California.9California Legislative Information. California Code CCP 337 Oral contracts get two years.10California Legislative Information. California Code CCP 339 The clock generally starts when the breach occurs, not when the downstream losses show up. Miss the deadline and the claim is gone regardless of its underlying strength, so if you suspect a breach has caused consequential losses, get in front of a lawyer well before the deadline approaches.