Confidentiality Agreement in California: Scope, Limits, and Remedies

A confidentiality agreement in California is enforceable only if it satisfies the four contract requirements of Civil Code Section 1550, stays narrow enough to avoid acting as a disguised noncompete, and preserves an employee’s right to speak about unlawful workplace conduct. Federal law layers on one more requirement: any agreement covering trade secrets must contain a whistleblower immunity notice, or the employer loses the right to enhanced damages. Miss any of these, and provisions — sometimes the entire contract — can be voided.

The Four Contract Elements

Under California Civil Code Section 1550, every enforceable contract requires parties with legal capacity, genuine consent, a lawful purpose, and adequate consideration.¹ For an NDA, that translates into four practical checks.

Capacity. Both parties must be legally able to contract. Minors and people declared mentally incapacitated generally cannot.
Consent. Both sides must voluntarily agree to the same terms. Agreements signed under threats, fraud, or duress can be voided.
Lawful purpose. The agreement cannot require anyone to commit an illegal act or violate California public policy. An NDA designed to conceal evidence of a crime fails this requirement.
Consideration. Something of value must flow between the parties. In an employment NDA, the job offer or access to proprietary information typically satisfies this. In a mutual NDA between two businesses, the exchange of confidential data by both sides does the work.

If any one of these is missing, a California court can declare the entire agreement voidable.

What the Agreement Can Protect

The definition of “Confidential Information” is where most NDAs either hold up or fall apart. California courts look skeptically at vague, catch-all definitions that sweep in everything a company produces. The agreement should explicitly identify the categories being protected: proprietary formulas, financial projections, customer data, unreleased product designs. The narrower and more specific the definition, the more likely it survives a challenge.

Standard Exclusions

Every well-drafted agreement carves out information the receiving party has no obligation to keep secret:

Information already known to the public when disclosed
Information that later becomes public through no fault of the receiving party
Information the receiving party developed independently, without using or referencing the confidential material
Information received from a third party who had no obligation to keep it confidential

Without these carve-outs, a receiving party could face liability for information they legitimately obtained on their own, which courts view as unreasonable.

Trade Secrets Versus General Confidential Information

The distinction matters because the remedies differ sharply. Under the California Uniform Trade Secrets Act (CUTSA), a trade secret is information that derives economic value from being kept secret and is the subject of reasonable efforts to maintain that secrecy.² A customer list built over years and kept under restricted access could qualify. A general company directory would not.

Trade secret status unlocks injunctive relief, damages for actual losses or unjust enrichment, and up to double damages for willful and malicious misappropriation.³ Information that is merely confidential but not a trade secret is limited to contract-based remedies. For that reason, agreements that clearly label which information the disclosing party treats as a trade secret give both sides firmer footing.

California’s Hard Limits on NDA Scope

California imposes limits that have no workaround. Provisions crossing these lines are simply void, no matter how carefully drafted.

No Disguised Noncompetes

California Business and Professions Code Section 16600 voids any contract that restrains someone from working in a lawful profession or business.⁴ The statute is deliberately broad. A confidentiality agreement that defines “confidential information” so expansively that a former employee effectively cannot work for a competitor becomes an unenforceable noncompete in disguise.

The practical line: an NDA can protect specific proprietary information, but it cannot prevent a former employee from using general skills, industry knowledge, or professional relationships developed on the job. Section 16600.5 extends this rule to agreements signed outside California, making them unenforceable when the employee works in the state.⁵ An employer that tries to enforce a void noncompete can face a private lawsuit for injunctive relief, actual damages, and attorney fees. Choosing another state’s law in the governing-law clause will not sidestep this.

Workplace Misconduct Cannot Be Silenced

Two overlapping statutes block NDAs from suppressing information about unlawful workplace behavior. Government Code Section 12964.5, as amended by the Silenced No More Act (SB 331), makes it an unlawful employment practice to include any provision in a separation or severance agreement that prohibits disclosing information about unlawful workplace acts, including harassment, discrimination, and retaliation based on any protected characteristic.⁶

If a separation agreement restricts an employee’s ability to discuss workplace conditions, it must include language stating, in substance, that nothing in the agreement prevents the employee from discussing or disclosing information about unlawful acts in the workplace. Omit the language, and the restriction is void. The employer must also give the employee at least five business days to consult an attorney before signing.⁶

Code of Civil Procedure Section 1001 covers settlement agreements. It prohibits confidentiality provisions that restrict disclosure of factual information related to claims of sexual assault, sexual harassment, or workplace harassment and discrimination. Any such provision entered on or after January 1, 2022 is void as a matter of law.

Both statutes allow the settlement amount itself to remain confidential, and a claimant can request that their own identity and identifying facts be shielded, though that option is unavailable when a government agency is a party. Neither statute prevents employers from protecting legitimate trade secrets or proprietary information unrelated to the unlawful conduct.

Working Conditions Generally

Beyond the harassment context, Labor Code Section 232.5 prohibits employers from requiring employees to refrain from disclosing information about working conditions. An employer cannot make silence about working conditions a condition of employment, require a waiver of this right, or retaliate against an employee who speaks up.⁷ An NDA that purports to bar all discussion of workplace conditions runs afoul of this rule. The law still permits protection of trade secrets and proprietary information through other provisions.

Federal Requirements That Still Apply

Two federal rules show up in California agreements often enough to matter.

DTSA Whistleblower Immunity Notice

The federal Defend Trade Secrets Act requires employers to include a notice of whistleblower immunity in any contract that governs the use of trade secrets or confidential information. The notice must inform the employee that federal law protects them from liability for disclosing trade secrets to a government official or an attorney for the purpose of reporting a suspected legal violation.⁸

Employers can satisfy the requirement either by including the full notice in the agreement itself or by cross-referencing a company policy document describing the reporting policy for suspected violations. The rule applies to all contracts entered into or updated after May 11, 2016, and the definition of “employee” includes contractors and consultants.⁸

The penalty for skipping the notice is concrete. An employer who fails to provide it cannot recover exemplary damages or attorney fees in a federal trade secret misappropriation claim against that employee.⁹

Tax Consequences for Harassment Settlements

Under Section 162(q) of the Internal Revenue Code, a business cannot deduct any settlement payment related to sexual harassment or sexual abuse if the settlement is subject to a nondisclosure agreement. The same rule blocks the deduction of related attorney fees. The IRS has clarified that this applies to the payor, not the recipient: a person who receives such a settlement can still deduct their own related attorney fees if otherwise eligible.¹⁰ Attaching an NDA to a sexual harassment settlement therefore carries a direct tax cost for the business.

Remedies When Someone Breaches

What a disclosing party can recover depends on whether the information was a trade secret or general confidential information.

Trade Secret Misappropriation

CUTSA provides a robust set of remedies. A court can issue an injunction ordering the receiving party to stop using or disclosing the information immediately.¹¹ The disclosing party can recover actual losses plus any unjust enrichment the violating party gained. If neither amount is provable, the court can impose a reasonable royalty instead.³ Willful and malicious misappropriation can trigger exemplary damages of up to twice the base award, and bad-faith claims or defenses can expose the losing side to attorney fees.¹²

Contract Claims for Non-Trade-Secret Information

When the disclosed information was confidential but not a trade secret, the claim is for breach of contract. Remedies typically include monetary damages for provable losses and, in some cases, an order to stop further disclosure. These claims are often easier to prove because the focus is on the specific language of the agreement rather than on meeting the trade secret definition. The tradeoff is no statutory doubling of damages and no automatic attorney fees, which is why trade secret classification is worth pursuing when the facts support it.

Structural Provisions That Keep the Agreement Working

A few drafting choices determine whether the substantive protections hold together under pressure.

Duration and Survival

Every NDA should state how long the confidentiality obligations last. For general confidential information, survival periods typically run one to five years after the business relationship ends, depending on how quickly the information loses competitive value. Trade secret protection can last indefinitely under CUTSA, as long as the information continues to meet the legal definition.² Leaving duration unspecified invites a court to fill the gap, and courts rarely fill it generously for the disclosing party.

Return or Destruction of Materials

A strong NDA requires the receiving party to return or destroy all confidential materials when the agreement ends or the business relationship terminates. Many go further and require written certification that all copies, notes, and derivative materials have been destroyed. The clause creates a clear obligation and a paper trail, which makes proving a later violation far simpler.

Severability

California courts occasionally strike down individual provisions while leaving the rest intact. A severability clause directs the court to do exactly that, rather than voiding the entire agreement. Given how aggressively California polices overbroad restrictions, severability is not optional.

Governing Law and Jurisdiction

An agreement involving California parties or California-based work should designate California law. Section 16600.5 voids a noncompete clause regardless of where the agreement was signed when the employee works in California, so selecting another state’s law in the governing-law clause offers no shelter from California’s public policy protections.⁵

1
California Legislative Information. California Civil Code 1550
2
California Legislative Information. California Civil Code 3426.1 – Trade Secret Definition
3
California Legislative Information. California Civil Code 3426.3 – Damages for Misappropriation
4
California Legislative Information. California Business and Professions Code 16600
5
California Legislative Information. California Business and Professions Code 16600.5
6
California Legislative Information. California Government Code 12964.5
7
California Legislative Information. California Labor Code 232.5
8
Office of the Law Revision Counsel. 18 U.S. Code 1833 – Exceptions to Prohibitions
9
Office of the Law Revision Counsel. 18 U.S. Code 1836 – Civil Proceedings
10
Internal Revenue Service. Section 162(q) FAQ
11
California Legislative Information. California Civil Code 3426.2 – Injunctive Relief
12
California Legislative Information. California Civil Code 3426.4 – Attorney Fees