By Pavel Kolmogorov, California Business Litigation Attorney (State Bar No. 321018). Founder of Kolmogorov Law, P.C., recognized in Chambers and Partners 2026 Spotlight Guide for Litigation: General Commercial in Orange County. Last reviewed: May 2026.

A competitor hires your sales lead and, within thirty days, half a dozen of your largest customers have signed term sheets to switch. A vendor signs a long-term supply contract with you, then defaults so it can take a better deal across town. Your business partner's cousin starts contacting your distributors with a competing product and a campaign suggesting your company is on the verge of bankruptcy.

Each of these scenarios may give rise to one of two related California torts: intentional interference with contract, or interference with prospective economic advantage. This guide explains the elements of both claims, the key defenses, the damages available, and how the torts fit alongside related claims like trade secret misappropriation and enforceable non-competes (and the unenforceable kind under California law).

Two Distinct Torts

California recognizes two interference torts that are often confused but have different elements and different burdens.

Intentional interference with contractual relations

This tort applies when a defendant disrupts an existing contract. The elements are set out in Pacific Gas & Elec. Co. v. Bear Stearns & Co. (1990) 50 Cal.3d 1118, 1126, and codified in CACI No. 2201:

1. A valid contract between the plaintiff and a third party.
2. The defendant's knowledge of the contract.
3. The defendant's intentional acts designed to induce a breach or disruption of the contract.
4. Actual breach or disruption of the contractual relationship.
5. Resulting damage.

The plaintiff does not need to prove the defendant's conduct was independently wrongful. Quelimane Co. v. Stewart Title Guaranty Co. (1998) 19 Cal.4th 26, 55. Knowing inducement of breach is enough.

Intentional interference with prospective economic advantage

This tort applies when there is no existing contract — the relationship is prospective. The elements (CACI No. 2202) are stricter:

1. An economic relationship between the plaintiff and a third party with the probability of future economic benefit.
2. The defendant's knowledge of the relationship.
3. Intentional and wrongful acts on the defendant's part designed to disrupt the relationship.
4. Actual disruption.
5. Resulting damage.

The crucial difference: the conduct must be independently wrongful. Della Penna v. Toyota Motor Sales, U.S.A., Inc. (1995) 11 Cal.4th 376. Wrongful conduct means a violation of a constitutional, statutory, regulatory, common-law, or other determinable legal standard. Mere competition — even hard competition — is not actionable.

Negligent interference with prospective economic advantage

California also recognizes a negligence variant under J'Aire Corp. v. Gregory (1979) 24 Cal.3d 799. CACI No. 2204 sets out the elements. The plaintiff must show a special relationship between the parties and that the harm was reasonably foreseeable. Negligent interference is rarely a strong stand-alone claim; it is most often paired with the intentional version.

What Counts as “Independently Wrongful” Conduct

For interference with prospective economic advantage, the “independently wrongful” element is the threshold issue in nearly every case. Courts have recognized the following kinds of wrongful conduct:

• Defamation or trade libel.
• Trade-secret misappropriation under Civil Code § 3426.
• Fraud or intentional misrepresentation.
• Violation of an enforceable nondisclosure or fiduciary duty.
• Threats of unfounded litigation (sham litigation).
• Bribery or other criminal conduct.
• Computer-fraud violations under Penal Code § 502.
• Violation of statutory licensing requirements, antitrust laws, or unfair-competition prohibitions.

What does NOT qualify as independently wrongful:

• Aggressive sales tactics or marketing.
• Hiring an at-will employee away from a competitor (without trade-secret theft or other wrongdoing).
• Underbidding a competitor on price.
• Persuading a customer to switch suppliers based on legitimate factors.

Common Defenses

Privilege and justification

A defendant may assert that the interference was privileged or justified. Common privileges:

• Competitor's privilege. Lawful competition for prospective economic advantage is privileged. San Francisco Design Center Associates v. Portman Companies (1995) 41 Cal.App.4th 29.
• Litigation privilege. Statements made in connection with judicial proceedings are absolutely privileged under Civil Code § 47(b), even if they cause interference.
• Financial-interest privilege. A person with a legitimate financial interest in a contract may interfere to protect that interest. Richardson v. La Rancherita (1979) 98 Cal.App.3d 73.
• Advice or opinion. Honest advice or opinion given to a contracting party is generally privileged.

No knowledge of the contract

The plaintiff must prove the defendant knew of the contract or relationship. A defendant who hires a salesperson without knowing the salesperson signed a non-solicit agreement may have a complete defense. (Note: California makes most non-competes unenforceable under Bus. & Prof. Code § 16600, but reasonable non-solicits during employment may still be enforceable in narrow circumstances — the analysis is fact-specific.)

The relationship was at-will

For prospective economic advantage, the existence of a “probability of future economic benefit” can be challenged where the underlying relationship was speculative. Mere hopeful expectation is not enough.

Damages

Damages for interference torts include:

• Lost profits from the disrupted contract or relationship, computed by reference to the plaintiff's historical performance and the duration of the disruption.
• Out-of-pocket expenses incurred in attempting to preserve the relationship.
• Loss of business value or goodwill attributable to the interference.
• Punitive damages when the defendant's conduct is malicious, oppressive, or fraudulent under Civ. Code § 3294. Common in employee-poaching and customer-list-theft cases.
• Restitution in some cases under a related Bus. & Prof. Code § 17200 claim.

The lost-profits proof is where these cases are won and lost. A retained damages expert is typically essential.

Pre-Suit Strategy

Interference cases benefit from rigorous pre-suit preparation:

• Litigation hold and forensic preservation. If you suspect a former employee took customer data or business plans, secure their company devices immediately and preserve email, phone, and cloud-account logs.
• Demand letter. A well-crafted demand letter setting out the facts and the legal theories often produces a stand-down agreement, especially when paired with credible threats of injunctive relief and statutory fees.
• Temporary restraining order considerations. If the interference is ongoing — for example, the competitor is still soliciting your customers using your data — a TRO may be available pending litigation.
• Statute of limitations. Two years for both interference torts under CCP § 339(1). The discovery rule may extend the period in concealment cases. See our civil litigation deadlines quick guide.

Frequently Asked Questions

Q: A competitor hired three of my best salespeople. They are taking customers with them. Can I sue?
A: Possibly. Under California law, hiring an at-will employee is generally lawful competition. To win, you must show independently wrongful conduct — for example, that the new employer induced the salespeople to use your trade secrets, breach their nondisclosure agreements, or take customer data. Without the wrongful-conduct element, the prospective-advantage claim will fail.

Q: My competitor circulated false statements about my business that scared off a customer. Is that interference?
A: Yes, in most cases. False statements about a business that disrupt a contract or prospective relationship support both an interference claim and an independent defamation claim. The defamation provides the “independently wrongful” element for prospective-advantage claims. Beware that defendants will likely respond with an anti-SLAPP motion.

Q: Does an enforceable non-disclosure agreement help my interference claim?
A: Yes. An NDA strengthens the case in two ways. First, the NDA establishes the contractual relationship that supports interference-with-contract claims. Second, breach of the NDA satisfies the “independently wrongful” element for prospective-advantage claims. Many companies pair NDAs with carefully drafted nonsolicit clauses (which California enforces in narrow circumstances).

Q: My contract has a no-third-party-beneficiary clause. Does that block interference claims?
A: No. The interference torts protect the contracting parties themselves — not third-party beneficiaries. A no-third-party-beneficiary clause limits standing for outsiders to sue on the contract; it does not affect either party's ability to sue someone for interfering with the contract.

Q: Can I get punitive damages?
A: Yes, if you prove by clear and convincing evidence that the defendant acted with malice, oppression, or fraud (Civ. Code § 3294). Punitive damages are common in cases involving deliberate poaching of customers using stolen data, false statements designed to harm a competitor, or breach of fiduciary duties.

About the author

Pavel Kolmogorov is the founder of Kolmogorov Law, P.C., a California business-litigation boutique in Irvine. He earned his LL.M. from the University of California, Berkeley School of Law and is licensed in California (SBN 321018), the District of Columbia, and the U.S. District Courts for the Northern, Southern, and Central Districts of California. He represents California businesses in breach of contract, fraud, UCL/B&P 17200, Penal Code 502, conversion, intentional and negligent interference, trade secrets, and partnership/shareholder disputes. Chambers and Partners 2026 recognized him in the Spotlight Guide for Litigation: General Commercial in Orange County.

This guide is general legal information, not legal advice for your specific situation. California law changes, and the facts of every dispute differ. To discuss how the principles in this article apply to your matter, contact our office at (909) 235-6116 or visit our contact page.

Need help? Contact Kolmogorov Law, P.C. at (909) 235-6116 or visit our contact page to schedule a consultation with our California business litigation team in Irvine, California.