Last updated: October 2026
Two questions decide most breach of contract claims. Whether the breach was material, which determines if you can stop performing and treat the contract as ended, or minor, which entitles you to damages but obliges you to continue. And whether you are in time: four years on a written contract, two on an oral one, running from the breach rather than from the day you decided it mattered. Bay Legal, P.C. acts for claimants and defendants in California contract disputes, from demand letter through trial or arbitration.
Definition: A breach of contract is a failure to perform an obligation the contract requires, without a lawful excuse for the failure.
Was the breach material or minor?
This is the first question and it changes what you may lawfully do next.
| Material breach | Minor breach | |
|---|---|---|
| What it is | Failure going to the essence of the bargain | Failure in an incidental term; substantial performance delivered |
| Can you stop performing? | Generally yes — the breach excuses your further performance | No. Stopping makes you the breaching party |
| Remedy | Damages, and you may treat the contract as ended | Damages for the shortfall only; the contract continues |
| Typical example | Contractor abandons the project midway | Contractor finishes a week late with no loss caused |
Materiality turns on how far the injured party was deprived of the benefit they reasonably expected, whether they can be adequately compensated in money, how much of the contract was performed, and whether the breaching party acted in good faith. It is a judgment, not a formula, which is why treating a breach as material is a decision worth taking advice on. Getting it wrong reverses the roles: the party who walked away becomes the one being sued.
What if the other side says in advance they will not perform?
That is anticipatory repudiation, and it gives you an immediate choice. A clear statement or unambiguous act showing the other party will not perform when the time comes allows you to treat the contract as breached straight away, or to wait and hold them to performance while urging them to proceed.
The choice matters. Suing immediately starts the clock and lets you mitigate early. Waiting preserves the deal but risks your own performance obligations continuing in the meantime. Where the repudiation is ambiguous rather than clear, a written demand for assurance of performance is the safer step.
What can you recover?
The measure is set by Civil Code section 3300: the amount which will compensate for all detriment proximately caused by the breach, or which in the ordinary course of things would be likely to result from it. Section 3301 limits that to damages clearly ascertainable in both nature and origin — a lost opportunity you cannot quantify is generally not recoverable.
- Compensatory damages — the ordinary remedy, putting you in the position performance would have.
- Consequential damages — losses flowing from the breach where foreseeable at the time of contracting. Frequently excluded by the contract, so check before relying on them.
- Liquidated damages — an agreed sum, valid under Civil Code section 1671 unless unreasonable in the circumstances existing when the contract was made.
- Specific performance — an order to perform, where damages are inadequate. Routine in real property disputes because each parcel is treated as unique.
- Rescission and restitution — unwinding the contract and returning what was exchanged, available for fraud, mistake, or failure of consideration.
You must also mitigate. A claimant who could reasonably have reduced their loss and did not recover only what they would have lost had they acted reasonably — which means the practical response to a breach is usually to find a replacement supplier or contractor promptly, and to document having done so.
Attorney fees are recoverable only where a contract or statute provides for them. A fee-shifting clause frequently matters more to how a dispute proceeds than the size of the claim, because it changes what each side risks by continuing.
How long do you have to sue?
Four years on a written contract under Code of Civil Procedure section 337, two years on an oral one under section 339. The period runs from the breach, not from when the loss became obvious or when negotiations broke down.
Two qualifications. A contract may specify a shorter period than the statute allows, within limits, so the agreement is worth reading before assuming four years. And where a contract calls for performance in instalments, each missed instalment may start its own period — which can mean part of a claim is time-barred while the rest survives.
Months of polite follow-up have ended more claims than any defence. The clock does not pause while parties try to resolve things informally.
What should you do first?
- Read the contract, including the parts nobody reads. Notice provisions, cure periods, dispute resolution clauses, limitation of liability, and any fee-shifting term. Several of these dictate what you must do before you can sue at all.
- Give notice and allow any cure period. Many contracts require written notice of breach and a defined opportunity to fix it. Skipping that step can defeat an otherwise good claim.
- Preserve the record. Emails, invoices, change orders, texts, and delivery records. Contemporaneous documents decide these cases far more often than recollection.
- Mitigate, and document it. Take reasonable steps to limit the loss and keep evidence of what you did and what it cost.
- Send a demand letter. A formal written statement of the claim, its basis, and what you want, with a deadline. A substantial share of commercial disputes resolve at this stage at a fraction of the cost of proceedings.
- Check the deadline before anything else. If the period is close to expiring, that governs the timetable regardless of how negotiations are going.
Where are breach of contract claims heard?
In the Superior Court of the county where the defendant resides or does business, or where the contract was to be performed, unless an arbitration clause or forum selection provision says otherwise. In practice that means Santa Clara, San Mateo, Alameda, San Francisco, or Contra Costa in the north, and Los Angeles, Orange, or Ventura in the south. The California Courts publish local rules, which differ by county and matter more than most litigants expect.
Smaller claims have a proportionate route. California’s small claims courts handle limited-value disputes without lawyers, which for a modest unpaid invoice often makes more sense than proceedings that cost more than the claim.
Who handles contract disputes at Bay Legal?
Lead litigation attorney Evan Livingstone heads the firm’s litigation group. Managing attorney Jayson R. Elliott handles contract and business matters and advises before a dispute becomes proceedings. Where the contract concerns construction or real property, it is handled by the attorneys practising in those areas rather than as general commercial litigation.
Bay Legal, P.C. serves clients statewide from offices in Palo Alto and Los Angeles, including across San Francisco and the wider Bay Area.
Frequently Asked Questions
What is a material breach of contract?
A failure going to the essence of the bargain, as distinct from a minor breach in an incidental term. It matters because a material breach generally excuses your own further performance and lets you treat the contract as ended, while a minor breach entitles you to damages but obliges you to continue performing.
How long do I have to sue for breach of contract in California?
Four years for a written contract under Code of Civil Procedure section 337, two years for an oral one under section 339. The period runs from the breach rather than from when the loss became clear. A contract can specify a shorter period within limits, so read the agreement before assuming four years.
Can I stop performing if the other side breaches?
Only if the breach is material. Stopping over a minor breach makes you the breaching party, which reverses the dispute entirely. Materiality turns on how far you were deprived of the benefit you expected, whether money can compensate you, and how much of the contract was performed. It is a judgment worth taking advice on.
What damages can I recover?
Compensatory damages under Civil Code section 3300 — the detriment proximately caused. Consequential damages where foreseeable and not excluded by the contract. Specific performance where money is inadequate. Liquidated damages where the clause is reasonable under section 1671. You must also mitigate, and document having done so.
Do I have to send a demand letter first?
Often the contract requires it. Many agreements contain notice and cure provisions that must be satisfied before suing, and skipping them can defeat a good claim. Beyond compliance, a demand letter resolves a substantial share of commercial disputes at a fraction of the cost of proceedings, and creates a record if it does not.
Can I recover my legal fees?
Only if a contract or statute provides for them. There is no general right to attorney fees in California. A fee-shifting clause often matters more to how a dispute proceeds than the size of the claim, because it changes what each side risks by continuing to litigate.
Related Questions
What is anticipatory repudiation?
A clear statement or act showing the other party will not perform when performance falls due. It lets you treat the contract as breached immediately, or wait and hold them to it. Where the signal is ambiguous, a written demand for assurance is safer.
Does an oral contract count?
Often yes, unless the statute of frauds requires writing. The difficulty is proving the terms, and the limitation period is two years rather than four.
What if both sides breached?
Common, and it turns on who breached first and whether that breach was material. A material breach by one party can excuse the other’s later non-performance, so sequence matters.
Can I sue in small claims court?
For limited-value disputes, often yes, and it is faster and cheaper. Businesses face lower limits than individuals and lawyers cannot appear, so it suits straightforward unpaid invoices rather than disputes over what a contract meant.
Talk to a California breach of contract attorney
The limitation period runs from the breach, and the contract may require notice before you can sue at all. To discuss a contract dispute with a Bay Legal attorney, call the office nearest you or email intake.
Bay Legal, P.C. — serving California statewide
Northern California office
667 Lytton Ave Ste 3, Palo Alto, CA 94301
(650) 668-8000
Southern California office
3211 Cahuenga Blvd W Ste 212, Los Angeles, CA 90068
(213) 668-8000
Intake: intake@baylegal.com
Fax: (650) 963-0041
Website: https://baylegal.com
This page is general information about California law and does not constitute legal advice or create an attorney-client relationship. For advice on your specific situation, contact a licensed California attorney.