California
California Trade Secret Laws: UTSA, Remedies & Deadlines
California's California Uniform Trade Secrets Act (CUTSA), Cal. Civ. Code §§ 3426 to 3426.11, enacted in 1984, is distinctive for its broad preemption rule: California courts consistently interpret CUTSA to displace virtually all competing common-law tort theories that rest on the same facts as a trade secret misappropriation claim. The limitations period is three years from discovery.
This guide is part of our Trade Secret Laws by State series.
Information last verified on 2026-06-25. This article presents general legal information, not legal advice. For guidance specific to your situation, see our full Trade Secret Laws by State resource or consult an attorney licensed in California.
Does California have a trade secret law?
Yes. California enacted CUTSA in 1984, codified at Cal. Civ. Code §§ 3426 to 3426.11. CUTSA covers civil misappropriation claims and preempts conflicting civil causes of action based on the same underlying facts (Cal. Civ. Code § 3426.7). California courts have applied this preemption broadly, routinely dismissing conversion, unjust enrichment, intentional interference, and similar common-law tort claims when the alleged wrongdoing amounts to trade secret misappropriation. Federal criminal liability may also arise under the Economic Espionage Act, 18 U.S.C. §§ 1831-1832, and the federal DTSA provides a parallel civil cause of action that is not displaced by CUTSA.
What counts as a trade secret and misappropriation in California?
Under Cal. Civ. Code § 3426.1(d), a trade secret is information, including a formula, pattern, compilation, program, device, method, technique, or process, that (1) derives independent economic value, actual or potential, from not being generally known to or readily ascertainable by others who could gain economic value from it, and (2) is subject to reasonable efforts to maintain its secrecy.
Misappropriation under Cal. Civ. Code § 3426.1(b) means acquisition by improper means, or disclosure or use without consent by someone who knew or should have known the information was obtained through improper means or under a duty of secrecy. Improper means include theft, bribery, misrepresentation, breach of a duty to maintain secrecy, and espionage. Reverse engineering and independent development are expressly lawful under CUTSA and do not constitute misappropriation.
Remedies and the limitations period in California
Cal. Civ. Code § 3426.2 authorizes injunctive relief to prevent actual or threatened misappropriation, including orders prohibiting future use. In exceptional circumstances where an injunction would be inequitable, a court may instead require payment of a reasonable royalty for the duration of unauthorized use.
Actual damages plus unjust enrichment, or a reasonable royalty where neither can be proved with certainty, are available under Cal. Civ. Code § 3426.3. Willful and malicious misappropriation allows the court to award exemplary damages of up to twice the compensatory amount. Attorney fees may be awarded when a claim or motion is made in bad faith or when willful and malicious misappropriation is established (Cal. Civ. Code § 3426.4).
The three-year limitations period runs from when the plaintiff discovered the misappropriation, or through reasonable diligence should have discovered it (Cal. Civ. Code § 3426.6). California courts apply a discovery rule; the clock does not automatically start on the date the first act of misappropriation occurred.
CUTSA's super-preemption and how it affects California litigation
CUTSA's preemption provision (Cal. Civ. Code § 3426.7) is broader than preemption in most UTSA states. When a plaintiff's common-law claims, such as conversion, interference with prospective economic advantage, or fraud, share factual allegations with the trade secret claim, California courts dismiss those independent claims as preempted. Plaintiffs must structure their complaints carefully: only allegations that rest on facts wholly independent from the misappropriation will survive.
CUTSA preemption does not extend to criminal prosecution, contract claims, or civil claims based on entirely separate conduct. It also leaves untouched any remedies available under the federal DTSA. Defendants in California trade secret litigation routinely file early motions to narrow or dismiss preempted counts, so plaintiffs benefit from clearly separating any non-misappropriation theories in their initial filings.
How the federal DTSA applies in California
The Defend Trade Secrets Act of 2016, 18 U.S.C. §§ 1836-1839, creates a federal civil remedy when the trade secret relates to a product or service used in, or intended for use in, interstate or foreign commerce. The DTSA does not preempt CUTSA (18 U.S.C. § 1838), and plaintiffs in California federal courts regularly plead both claims together. The DTSA's three-year limitations period matches CUTSA's period (18 U.S.C. § 1836(d)).
Federal remedies include injunction, actual damages, unjust enrichment or a reasonable royalty, exemplary damages up to 2x for willful and malicious misappropriation, and attorney fees (18 U.S.C. § 1836(b)(3)). Any confidentiality agreement signed or updated after May 11, 2016, must include a whistleblower-immunity notice under 18 U.S.C. § 1833(b)(3). Omitting it forfeits exemplary damages and attorney fees under the DTSA. California employers with large workforces and extensive use of NDAs face particular exposure to this requirement.
As of 2026-06-25, this article reflects California statutes and federal law as publicly available. Laws change; consult a lawyer licensed in California before taking or forgoing any legal action.
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- Trade Secret Laws by State
- Nevada Trade Secret Laws
- Arizona Trade Secret Laws
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Last updated: 2026-06-25.
Frequently Asked Questions
Does CUTSA preemption eliminate all non-trade-secret claims in California?
No. CUTSA preempts civil claims that are based on the same underlying facts as the trade secret misappropriation. Claims arising from wholly independent conduct, contract claims, and criminal charges are not preempted. California courts examine whether the complaint's allegations depend on the same conduct that constitutes the alleged misappropriation before dismissing a parallel count.
Can a former employee's customer relationships be a trade secret in California?
Customer lists and relationship data can qualify as trade secrets in California if they derive economic value from secrecy and are protected by reasonable measures, such as restricted access and confidentiality agreements. California Labor Code § 16600 also broadly restricts non-compete clauses, so trade secret law is often the primary tool for protecting customer relationships after a departure.
When does the three-year CUTSA clock begin in California?
The period starts when the plaintiff discovered the misappropriation or, through the exercise of reasonable diligence, should have discovered it (Cal. Civ. Code § 3426.6). California applies a discovery rule, so the clock is tied to knowledge or constructive notice, not necessarily to the date the first misappropriation occurred.
What happens if a California employer omits the DTSA whistleblower notice?
Omitting the required notice from a confidentiality agreement signed or updated after May 11, 2016, means the employer cannot seek exemplary damages or attorney fees under the DTSA in any subsequent misappropriation action. The underlying trade secret claim remains available, and CUTSA remedies are unaffected; only those two enhanced federal remedies are forfeited.
Is reverse engineering lawful in California?
Yes. CUTSA expressly permits reverse engineering and independent development as lawful means of acquiring information. A party that independently recreates a formula, process, or device through legitimate analysis does not commit misappropriation under California law, even if the resulting information is identical to the trade secret.
Sources and References
- California Uniform Trade Secrets Act, Cal. Civ. Code §§ 3426 to 3426.11(leginfo.legislature.ca.gov).gov
- Defend Trade Secrets Act, 18 U.S.C. §§ 1836-1839(law.cornell.edu)
- Uniform Trade Secrets Act (Uniform Law Commission)(uniformlaws.org)
- Economic Espionage Act, 18 U.S.C. §§ 1831-1832(law.cornell.edu)