Contract law in California requires four things for an agreement to be enforceable: parties who are legally capable of contracting, mutual consent, a lawful object, and consideration — something of value moving between the sides. Those elements come from Civil Code 1550, and missing any one of them can sink the whole deal.1California Legislative Information. California Civil Code 1550 On top of that, California has its own rules about which contracts must be in writing, which clauses courts will refuse to enforce, and how long you have to sue when someone breaks a promise.
What Makes a California Contract Valid
A contract begins with an offer — a clear proposal to do or exchange something — and an acceptance that matches the offer without tacking on new conditions. Consideration is what separates a binding contract from a gift or an empty promise. Each side has to give up something of value: money, services, a promise to act, or a promise not to act.
Both sides must actually agree to the same terms. Courts look at the contract’s language and the parties’ conduct to decide whether real agreement existed, and vague or incomplete terms can undo an agreement that otherwise looks solid.
Capacity matters too. Civil Code 1556 excludes minors, people of unsound mind, and people deprived of civil rights from forming enforceable contracts.2California Legislative Information. California Civil Code 1556 In practice, that means you must be at least 18 and mentally competent. Contracts signed by minors are generally voidable, though contracts for necessities like food or shelter are handled differently. If a signer lacked the mental capacity to understand what they were agreeing to, a court can unwind the deal.
Most California contracts don’t need any particular format. A handshake deal is technically valid outside the categories covered by the Statute of Frauds. Electronic signatures carry full legal weight under California’s Uniform Electronic Transactions Act, starting at Civil Code 1633.1, and even a typed name in an email can qualify depending on context and whether both parties meant to do business electronically.3Justia. CACI No. 380 – Agreement Formalized by Electronic Means
When a Contract Must Be in Writing
California’s Statute of Frauds, Civil Code 1624, lists the deals that only bind if there’s a written record signed by the party you want to hold to the agreement:4California Legislative Information. California Civil Code 1624
- Agreements that by their terms cannot be fully performed within one year of signing.
- Promises to pay another person’s debt if that person defaults.
- Real estate transactions, including land sales, leases longer than one year, and any agreement creating or transferring an interest in property.
- Sales of goods worth $500 or more, under California Commercial Code 2201.5California Legislative Information. California Commercial Code 2201
The “writing” doesn’t have to be a formal contract. Emails, letters, or a collection of documents that together set out the essential terms can be enough, so long as the person being held to the deal signed them.
Real estate gets the strictest treatment. Courts refuse to enforce oral promises about land sales or property transfers even when both sides clearly intended to go through with the deal. If the transaction touches real property, put it in writing.
Terms That Can Void a Contract
Even a signed contract can fall apart if the terms are too vague. Price, quantity, and what each side has to do all need to be clear enough that a court can tell whether the parties met their obligations. An agreement with no definite price is often too uncertain to enforce.
The purpose also has to be legal. Civil Code 1667 voids agreements that violate a statute, a regulation, or public policy. A contract asking someone to waive minimum wage or overtime rights, for instance, won’t hold up because it conflicts with Labor Code protections.
Unconscionable Agreements
California courts can throw out a contract that is unconscionable. They look at two dimensions, and a contract usually needs some degree of both before a judge will strike it down.
Procedural unconscionability focuses on how the contract came together. Warning signs include take-it-or-leave-it terms, important clauses buried in fine print, deliberately confusing language, and a big imbalance in bargaining power. Contracts obtained through duress, threats, fraud, or undue influence can also be voidable under Civil Code 1567, which describes when apparent consent is not real consent.6California Legislative Information. California Civil Code 1567
Substantive unconscionability looks at what the contract actually says. Provisions that impose extreme penalties, strip away fundamental legal rights, or overwhelmingly favor one side are candidates to be invalidated. Civil Code 1670.5 gives judges broad authority to refuse to enforce an unconscionable contract, cut out the offending clause, or limit how it applies.7California Legislative Information. California Civil Code 1670.5
Non-Compete Clauses
California is unusual in treating non-compete agreements as almost entirely unenforceable. Business and Professions Code 16600 declares void any contract that restrains someone from engaging in a lawful profession, trade, or business.8California Legislative Information. California Business and Professions Code 16600 The statute is intentionally broad, and courts have consistently rejected creative workarounds.
SB 699, effective in 2024, extended the ban further. It applies California’s prohibition even to non-compete clauses signed outside the state, and it bars employers from trying to enforce a void clause against current or former California employees.9California Legislative Information. Senate Bill 699 An employee can sue for injunctive relief and actual damages, and a prevailing employee can recover attorney fees.
A few narrow exceptions live elsewhere in the Business and Professions Code, mainly for the sale of a business, the dissolution of a partnership, or the dissolution of an LLC, where the seller or departing partner agrees not to compete within a defined geographic area. Outside those situations, a non-compete clause in a California employment or contractor agreement is almost certainly void.
Suing for Breach of Contract
Not every failure is worth suing over. Courts separate minor breaches from material ones. A material breach defeats the contract’s central purpose, like a supplier that never delivers at all. Judges weigh how serious the breach was, how much of the agreement the breaching party did perform, and whether the other side still got meaningful value.
To win, a plaintiff has to prove four things: a valid contract existed, they performed their own obligations or had a legal excuse not to, the other side failed to perform, and they suffered damages as a result. Written communications, invoices, performance records, and correspondence carry the evidentiary weight.
Your Duty to Mitigate
California doesn’t let you sit back and let losses pile up after a breach. Civil Code 3358 caps recoverable damages at the amount you would have gained if the contract had been fully performed.10California Legislative Information. California Civil Code 3358 You have to take reasonable steps to keep your losses down. If a buyer backs out, you’re expected to look for a replacement buyer rather than let the goods sit and then sue for the full contract price. Failing to mitigate can shrink your recovery, sometimes to nothing.
Force Majeure
Force majeure clauses excuse performance when extraordinary events like natural disasters, wars, pandemics, or government shutdowns make performance impossible or impractical. California courts read these clauses strictly, so a vaguely worded provision may not save you when you need it. A useful clause defines the specific triggering events, requires prompt notice, obligates the affected party to limit disruption, and sets a timeline before either side can terminate. Without a force majeure clause, you’re generally stuck with your obligations unless performance becomes literally impossible, which is a high bar.
What You Can Recover
The point of a contract remedy is to put the injured party in the financial position they would have been in if the deal had gone through. What the court awards depends on whether money can actually fix the problem.
Compensatory Damages
Compensatory damages come in two flavors. General damages cover the direct loss from the breach itself, meaning the gap between what you were promised and what you got. Consequential damages cover foreseeable losses that flowed from the breach, like lost profits on a downstream deal that fell through because a supplier didn’t deliver. Civil Code 3300 sets the standard: damages must compensate for all harm “proximately caused” by the breach or that would “in the ordinary course of things” result from it.11California Legislative Information. California Civil Code 3300 Damages must also be reasonably certain. Speculative future profits generally don’t qualify.
Punitive damages are not available in a pure contract case. Civil Code 3294 limits them to claims involving “oppression, fraud, or malice” arising from obligations “not arising from contract.”12Justia. California Civil Code Article 3 – Exemplary Damages You can only get punitives if the breach also involves tortious conduct, such as fraud in how the contract was formed. A plain failure to perform, however frustrating, won’t support them.
Specific Performance and Injunctions
When money can’t make you whole, a court may order the breaching party to actually do what they promised. This is called specific performance, and Civil Code 3384 supplies the authority.13California Legislative Information. California Civil Code 3384 It shows up most often in real estate, where each parcel is treated as unique and no cash award can replace the specific property you contracted to buy.
Injunctive relief goes the other way. It stops someone from doing something that violates the contract, and it’s commonly used to enforce confidentiality provisions or to keep a former business partner from misusing trade secrets.
How Long You Have to Sue
California sets hard deadlines for filing a breach of contract lawsuit, and they turn on whether the contract was written or oral:
- Written contracts: four years from the date of the breach, under Code of Civil Procedure 337.14California Legislative Information. California Code of Civil Procedure 337
- Oral contracts: two years from the date of the breach, under Code of Civil Procedure 339.15California Legislative Information. California Code of Civil Procedure 339
The clock generally starts on the date of the breach, not the date you find out about it. Limited exceptions exist for fraud-based claims where the breach was concealed. Miss the deadline and a court will almost certainly toss the case regardless of its merits.
Attorney Fees
Under the default American rule, each side pays its own attorney fees no matter who wins. California follows that rule with one important twist: Civil Code 1717 automatically turns any one-sided attorney fee clause into a reciprocal one.16California Legislative Information. California Civil Code 1717 If a contract says only the landlord or only the business can recover attorney fees, California law rewrites it so whichever party wins can collect fees from the loser.
That matters more than most people realize. A fee-shifting clause meant to protect one side becomes a financial risk for that same side if they lose. When reviewing a California contract, check whether it contains a fee provision, and assume it will apply both ways. Without such a clause, each side pays its own legal costs win or lose.
Filing Fees and Small Claims
The cost of filing a breach of contract case in California depends on how much money is at stake. As of January 2026, the Superior Court fee schedule looks like this:17California Courts. Statewide Civil Fee Schedule Effective January 1, 2026
- Claims up to $10,000: $225 filing fee.
- Claims over $10,000 up to $35,000: $370 filing fee.
- Claims over $35,000: $435 filing fee.
For smaller disputes, California’s small claims court is faster and cheaper, with filing fees between $30 and $75. Individuals can sue for up to $12,500. Businesses are capped at $6,250.18California Courts. Small Claims in California The tradeoff: neither side can bring an attorney to the hearing, and the process is more informal. For contract disputes under the threshold, small claims is often the most practical path.