Understanding Breach of Contract Damages in California

When one party fails to perform their obligations under a contract, California law provides several theories of recovery for the non-breaching party. This calculator estimates damages under three primary theories, each designed to compensate the injured party from a different perspective.

Expectation Damages (Benefit of the Bargain)

Expectation damages are the most common measure of contract damages. They aim to put you in the position you would have been in had the contract been fully performed. This includes the profit or benefit you expected to receive, plus any additional costs you incurred to obtain substitute performance (cover), plus foreseeable consequential damages, minus any amounts you received or could have recovered through reasonable mitigation efforts.

Example: You contracted to purchase custom machinery for $50,000 that would generate $80,000 in revenue. The seller breaches, and substitute machinery costs $65,000. Your expectation damages would be: $80,000 (expected benefit) + $65,000 (cover cost) - $50,000 (original price) - amounts mitigated = $95,000 base damages before adjustments.

Reliance Damages (Out-of-Pocket Recovery)

Reliance damages aim to restore you to the position you were in before the contract was formed. This theory is particularly useful when the contract's expected profit is difficult to prove or is speculative. Reliance damages cover your out-of-pocket expenditures made in reasonable reliance on the contract, including preparation costs and potentially opportunity costs.

Example: You spent $15,000 on materials, $8,000 on permits, and $5,000 on labor preparing to perform a construction contract. The other party breaches before you begin. Your reliance damages would be $28,000 minus any salvage value or mitigation.

Restitution (Unjust Enrichment)

Restitution focuses on the value the breaching party received from you. Rather than measuring your loss, it measures the breacher's gain. This theory prevents unjust enrichment and is particularly useful when you have conferred substantial value on the other party before the breach.

Example: You delivered $25,000 worth of consulting services and paid $10,000 in advance fees. The client breaches and returns $3,000 worth of materials. Your restitution damages would be $25,000 + $10,000 - $3,000 = $32,000.

Prejudgment Interest

California law allows prejudgment interest on contract damages. If the contract specifies an interest rate, that rate applies. Otherwise, the statutory rate of 10% per annum (Civil Code section 3289) applies to damages that are certain or can be made certain by calculation. Interest accrues from the date of breach or the date the obligation became due.

The Duty to Mitigate

Under California law, the non-breaching party has a duty to take reasonable steps to minimize damages. You cannot recover for losses that you could have avoided through reasonable effort and expense. This calculator accounts for mitigation in each damages theory.

California Civil Code - Contract Damages

CC §3300 - Measure of Damages

"For the breach of an obligation arising from contract, the measure of damages, except where otherwise expressly provided by this Code, is the amount which will compensate the party aggrieved for all the detriment proximately caused thereby, or which, in the ordinary course of things, would be likely to result therefrom."

This is the foundational statute for all contract damages in California. It establishes that the injured party is entitled to full compensation for losses that naturally flow from the breach.

CC §3301 - Damages Limited to Detriment

"No damages can be recovered for a breach of contract which are not clearly ascertainable in both their nature and origin."

This statute requires that damages be proven with reasonable certainty. Speculative or uncertain damages are not recoverable, which is why reliance damages may be preferable when expectation damages are difficult to quantify.

CC §3358 - No Greater Amount

"Except as expressly provided by statute, no person can recover a greater amount in damages for the breach of an obligation than he or she could have gained by the full performance thereof on both sides."

This limits expectation damages to the benefit of the bargain. You cannot recover more than you would have received had the contract been performed.

CC §3287 - Interest on Damages Certain

"Every person who is entitled to recover damages certain, or capable of being made certain by calculation, and the right to recover which is vested in the person upon a particular day, is entitled also to recover interest thereon from that day."

This authorizes prejudgment interest on liquidated (certain) damages from the date the amount became due.

CC §3289 - Interest Rate

"(a) Any legal rate of interest stipulated by a contract remains chargeable after a breach thereof, as before, until the contract is superseded by a verdict or other new obligation. (b) If a contract entered into after January 1, 1986, does not stipulate a legal rate of interest, the obligation shall bear interest at a rate of 10 percent per annum after a breach."

This establishes the 10% statutory rate for contracts that do not specify an interest rate, which is the rate used by this calculator when no contract rate is provided.

Code of Civil Procedure - Statutes of Limitations

CCP §337 - Written Contract (4 Years)

"Within four years: 1. An action upon any contract, obligation or liability founded upon an instrument in writing." This gives you four years from the date of breach to file a lawsuit on a written contract.

CCP §339 - Oral Contract (2 Years)

"Within two years: 1. An action upon a contract, obligation or liability not founded upon an instrument of writing." Oral contracts have a significantly shorter limitations period, making prompt action essential.

CCP §338(d) - Fraud (3 Years)

"An action for relief on the ground of fraud or mistake. The cause of action in that case is not to be deemed to have accrued until the discovery, by the aggrieved party, of the facts constituting the fraud or mistake." If the breach involves fraud, the 3-year period runs from discovery rather than the date of the fraudulent act.

Click any question to expand the answer.

What is the difference between expectation and reliance damages?

What are consequential damages and when can I recover them?

How is prejudgment interest calculated on a breach of contract in California?

What is the statute of limitations for breach of contract in California?

Can I get punitive damages for breach of contract in California?

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