Yes, a California employee owes the employer loyalty for as long as the job lasts, even without a written agreement. The Court of Appeal stated the rule in Huong Que, Inc. v. Luu (2007) 150 Cal.App.4th 400: “an employee, while employed, owes undivided loyalty to his employer.” That duty ends at resignation, and California’s ban on noncompetes takes over. For an employer, the duty matters in two situations: firing someone who’s building a competing business, and suing someone who already did.
Where does the duty of loyalty come from?
From a 1937 statute and the common law of agency. Labor Code section 2863 provides that “An employee who has any business to transact on his own account, similar to that intrusted to him by his employer, shall always give the preference to the business of the employer.” Two neighboring sections fill in the picture. Section 2860 states that “Everything which an employee acquires by virtue of his employment, except the compensation which is due to him from his employer, belongs to the employer.” Under section 2861, an employee must “give prompt notice to his employer of everything which he receives for the account of the employer.”
Courts treat these statutes as part of a broader rule. In Huong Que, the court explained that a breach “may give rise to a cause of action in the employer, when the employee takes action which is inimical to the best interests of the employer.”
Can an employee prepare to compete before resigning?
Some preparation is allowed. The Huong Que court quoted the governing rule: “While California law does permit an employee to seek other employment and even to make some ‘preparations to compete’ before resigning [citation], California law does not authorize an employee to transfer his loyalty to a competitor.”
The line between the two is factual. Forming an entity or interviewing with a competitor usually counts as preparation. Soliciting the employer’s customers or recruiting coworkers while still on the payroll usually crosses into competition. Most disputes turn on what the employee did and when, so the timeline is the document that matters most.
Can a company fire an employee who’s preparing to compete?
Often, yes, even before any harm occurs. In Stokes v. Dole Nut Co. (1995) 41 Cal.App.4th 285, two long-time supervisors at an almond processing plant spent more than a year planning a competing plant, preparing financial projections and seeking loans. One of them had asked a coworker about coming to work at the new facility. Dole fired them, and they sued for wrongful termination, claiming Dole had promised to fire only for cause.
The Court of Appeal affirmed summary judgment for Dole. The court explained that “an employer is not required to retain an employee while awaiting the commission of a tort,” and that “actions short of tortious misbehavior may support termination when considered in the circumstances of the particular case involved.” On the facts, “It was not necessary for Dole to wait to see whether they would engage in actual tortious misconduct; their outside activities had progressed to the point that conflicts of interest compromised Dole’s right to their undivided loyalties.”
That holding is a defense tool. An employer that fires a manager over a documented plan to compete has a strong answer to a wrongful termination claim, even if the employee never took a customer. The court added that the point at which outside activities justify termination “is dependent upon the particular circumstances of the case, with appropriate deference to the exercise of managerial discretion.”
Can the company sue the employee, or the competitor that hired them?
It can, when the employee competed while still employed. In Guild Mortgage Co. LLC v. CrossCountry Mortgage LLC (May 27, 2026, D085036), a published decision of the Fourth District, Division One, a mortgage lender alleged that a rival “induced and conspired with several of Guild’s Kirkland, Washington branch employees to gut the branch” by recruiting colleagues and taking customers and loan applications, “all while those employees were still employed, and being paid, by Guild.” The trial court dismissed the case on demurrer. The Court of Appeal reversed.
The court rejected the argument that ordinary employees owe no actionable duty, stating that “to the extent AMN can be read to hold that California does not impose an actionable duty of loyalty on employees, we decline to follow it.” It also held that the trade secrets statute didn’t displace the lender’s interference claims, because “the conduct alleged here goes far beyond merely taking and using confidential information.” The case was at the pleading stage, so the facts remain allegations. But the decision keeps a claim against the hiring competitor alive when it helped employees compete before they quit.
What does the duty not cover?
Conduct after resignation, mostly. Once the employment ends, the duty of loyalty ends with it, and California’s broad ban on noncompete agreements limits what an employer can stop a former employee from doing. Former employees can still be liable for misusing trade secrets, but that’s a separate claim with its own rules.
The duty also doesn’t reach every side job. Labor Code section 96(k) lets the Labor Commissioner hear “Claims for loss of wages as the result of demotion, suspension, or discharge from employment for lawful conduct occurring during nonworking hours away from the employer’s premises.” A weekend job that doesn’t compete with the employer is a weak basis for termination. A side business that competes for the same customers is a different matter.
How do duty of loyalty situations compare?
| Employee conduct while still employed | Likely treatment | Where the employer’s case starts |
|---|---|---|
| Interviewing with a competitor or forming an entity | Usually permitted preparation | Whether anything more happened before resignation |
| Detailed plan to open a competing business, with financing efforts | May support termination for cause under Stokes | Documents showing the plan and the employee’s role |
| Recruiting coworkers to a competitor | Often a breach, and can support claims against the competitor | The recruitment messages and their dates |
| Diverting customers, deals, or loan pipelines | Breach of the duty of loyalty and Lab. Code § 2863 | Customer records and the timing of each transfer |
| Unrelated side job on personal time | Generally protected lawful off-duty conduct | Whether the side work actually conflicts with the business |
What should an employer do when an employee may be competing?
These cases are won or lost on the timeline. Build it before acting.
- Preserve the employee’s email, chat messages, texts on company devices, file access logs, CRM records, and the handbook and conflict-of-interest policies in effect.
- Calendar any deadline in a demand or complaint from the employee, and check for an arbitration agreement and an employment practices liability (EPLI) policy with notice requirements.
- Identify coworkers who were approached, the managers who learned of the plan, and the decision-maker, and avoid steps against other employees that could look like retaliation for complaints they’ve made.
- Gather the documents the dispute depends on, including customer and deal records showing any diversion, recruitment messages, and the dates of each event.
- Talk to a lawyer before terminating the employee, sending a cease-and-desist letter, contacting the new employer, or offering anything in a separation agreement.
Employers looking for defense of duty of loyalty disputes for California employers can review the firm’s practice page.
Duty of loyalty questions from California employers
Does a rank-and-file employee owe a duty of loyalty, or only executives?
Both owe it, though the scope may differ. Section 2863 applies to any employee. Officers and managers with real discretion may also owe broader fiduciary duties. A cashier who works a weekend shift at a rival store poses a different risk than a branch manager moving the branch’s customers.
Do we have to warn the employee before firing them?
California law doesn’t require a warning for an at-will employee. If the company has promised to fire only for cause, Stokes shows that a documented conflict can be cause. Either way, the termination decision should be based on what the employee actually did, written down before the meeting.
Can we withhold the final paycheck if the employee was disloyal?
No. Final wages are due on the statutory schedule regardless of any claim the company has against the employee. Withholding them invites waiting-time penalties. Pay the wages in full and pursue any loyalty claim separately.
Should we sue if the employee has already left?
Weigh the evidence first. A loyalty claim usually reaches only what happened before resignation, and it often draws counterclaims for unpaid wages or retaliation. A case backed by records of diverted customers is far stronger than one based on suspicion about timing.
If a competing-employee dispute reaches your company
If your company has fired an employee who was building a competing business, or is weighing claims over employees who left with customers, the timeline of what happened before resignation usually decides how strong each side’s position is. Rosenberger + Kawabata represents employers defending employment lawsuits and claims through its business litigation practice, including wrongful termination claims after a breach of the duty of loyalty. Contact Rosenberger + Kawabata online for a confidential consultation, or call (310) 894-6921.
Sources
The statutes are Business and Professions Code section 16600, Labor Code section 96, section 201, section 2860, section 2861, and section 2863. The published decisions of the California Court of Appeal are Stokes v. Dole Nut Co. (1995) 41 Cal.App.4th 285, Huong Que, Inc. v. Luu (2007) 150 Cal.App.4th 400, and Guild Mortgage Co. LLC v. CrossCountry Mortgage LLC (May 27, 2026, D085036).
This post is general information about California employment law as of November 7, 2026. It is not legal advice, and reading it does not create an attorney-client relationship. Employment statutes, regulations, and court decisions change often, and the outcome of any claim depends on its facts. Past results do not guarantee future outcomes.