California Non-Solicitation Agreements: Rules and Limits

This article is provided for educational and informational purposes only. It does not constitute legal, financial, or tax advice, and no attorney-client relationship is formed by reading it. Laws, regulations, official guidance, and related information vary by jurisdiction, change frequently, and may have changed or become outdated since publication. Always verify current information with authoritative sources and consult a qualified professional about your specific circumstances. The author and publisher assume no liability for actions taken based on this information.

A non-solicitation agreement limits efforts to pursue a defined group of people or business relationships. In employment, the clause may address customers, clients, employees, contractors, or referral sources after a worker leaves. California does not decide the clause’s validity from its label alone. The practical question is whether the provision restrains lawful work, fits a statutory exception, protects an actual trade secret without suppressing ordinary competition, or operates instead as a restraint between businesses.

California starts with a broad rule against restraints on work

California Business and Professions Code section 16600 provides that, except as the same statutory chapter allows, every contract restraining anyone from engaging in a lawful profession, trade, or business is void to the extent of the restraint. The Legislature has directed courts to read that rule broadly in the employment context and to reject noncompete restraints even when narrowly tailored unless a statutory exception applies.

The California Supreme Court applied that policy in Edwards v. Arthur Andersen LLP. The agreement barred a former accountant for 18 months from providing specified services to clients on whose accounts he had worked and, for one year, from soliciting certain office clients. The court held the restrictions invalid because they restrained his ability to practice his profession, and it rejected a general “narrow restraint” exception.

This result helps explain why a customer non-solicitation clause can function like a noncompete agreement. A clause does not have to bar employment with a named competitor if its practical operation prevents a former worker from serving part of the available market.

Customer and employee restrictions raise related but distinct questions

A customer clause usually restricts communications intended to obtain business from former clients or customers. Some clauses go further and prohibit accepting work from those customers even when the customer initiates contact. A restriction on performing services is more than a rule about the manner of communication; it directly limits who the former worker may serve.

An employee non-solicitation clause usually restricts recruiting or encouraging former coworkers to leave. In AMN Healthcare, Inc. v. Aya Healthcare Services, Inc., the Court of Appeal considered recruiters whose profession involved recruiting travel nurses. It held that a one-year or 18-month prohibition on soliciting AMN employees restrained those recruiters from practicing their profession and violated section 16600.

The decision was tied to the provision and work before the court, but it is an important warning against treating employee non-solicitation language as categorically separate from California’s mobility policy. The analysis turns on what the clause actually prevents, not simply whether it uses the word “solicit” instead of “compete.”

Trade-secret law protects information, not freedom from competition

California’s Uniform Trade Secrets Act separately protects information that derives actual or potential economic value from not being generally known and that is subject to reasonable efforts to maintain secrecy. Misappropriation can include improper acquisition or unauthorized disclosure or use of a qualifying trade secret.

A genuinely secret customer list, pricing model, recruiting strategy, or other protected compilation can therefore support a trade-secret claim when the statutory elements are met. But the word “confidential” in an NDA or non-solicitation agreement does not establish that every customer name, worker identity, skill, or relationship is a trade secret.

AMN Healthcare illustrates the distinction. The court rejected contract claims based on the use of information that was not a trade secret, while leaving trade-secret law to govern information that could satisfy the statutory definition. An agreement drafted so broadly that it prevents a former worker from using general knowledge or publicly available information can restrain lawful work rather than protect a legally recognized secret.

Business-to-business restraints use a different framework

Not every non-solicitation agreement arises from employment. Distribution, settlement, collaboration, franchise, and service agreements sometimes limit one company’s dealings with customers, suppliers, or other businesses.

In Ixchel Pharma, LLC v. Biogen, Inc., the California Supreme Court held that section 16600 applies to business contracts. It also held that a rule of reason governs a contractual provision restraining one business from engaging with another business. That fact-sensitive standard examines the restraint’s competitive purpose and effect rather than automatically applying the employment rule described in Edwards.

The distinction matters because a clause between commercial entities should not be analyzed as though one of the businesses were simply a departing employee. It also does not mean that every commercial restraint is valid; the rule-of-reason inquiry remains capable of invalidating an unreasonable restraint.

Statutory exceptions are specific, not a general reasonableness escape hatch

Section 16601 permits certain sellers of business goodwill or ownership interests to agree not to carry on a similar business within a specified geographic area while the buyer or a successor continues a like business there. Related provisions address restraints associated with the dissolution of or dissociation from partnerships and limited liability companies.

These exceptions reflect transactions in which a buyer or remaining owners may pay for goodwill that would lose value if the seller immediately reclaimed the same business. They do not create a general power to enforce any customer or employee restriction that appears reasonable. The transaction and restraint must fit the governing statutory language.

Newer statutes strengthen the consequences of void employment restraints

Since January 1, 2024, section 16600.5 has made contracts void under California’s restraint-of-trade chapter unenforceable regardless of where and when they were signed. It bars an employer or former employer from attempting to enforce such a void contract and authorizes an employee, former employee, or prospective employee to pursue injunctive relief, actual damages, and, for a prevailing claimant, reasonable attorney’s fees and costs.

Section 16600.1 also makes it unlawful to include a noncompete clause in an employment contract or require an employee to enter an agreement that does not satisfy a statutory exception. Its February 14, 2024 notice deadline applied to specified current and former employees whose contracts contained void noncompete provisions.

California Labor Code section 925 adds a related choice-of-law rule for employees who primarily reside and work in California. For contracts entered into, modified, or extended on or after January 1, 2017, an employer generally may not require such an employee, as a condition of employment, to adjudicate a California claim elsewhere or lose California’s substantive protection; the statute contains an exception when the employee was individually represented by counsel in negotiating the forum or choice-of-law term.

How the pieces fit together

A useful reading of a California non-solicitation agreement separates several questions. What relationships does the clause cover? Does it prohibit active outreach, accepting unsolicited business, performing services, recruiting workers, or using specified information? Does the restricted person act as a former employee, a seller of goodwill, an owner leaving a business, or a commercial counterparty?

The answers identify the governing framework. Employment restraints receive the broad protection of section 16600 and the California cases applying it. Qualifying sale-of-business and ownership transactions may fall within express statutory exceptions. True trade secrets remain protected under separate law, while ordinary competition and general professional knowledge do not become secret merely because a contract says so. Business-to-business restraints call for the rule-of-reason analysis recognized in Ixchel.

This framework also shows why the broader California contract guide and the narrower non-solicitation topic are complementary. General contract formation principles do not answer whether a particular restrictive covenant conflicts with California’s specific mobility statutes and cases.

Sources

• California Business and Professions Code section 16600
• California Business and Professions Code section 16600.1
• California Business and Professions Code section 16600.5
• California Business and Professions Code section 16601
• California Labor Code section 925
• California Civil Code section 3426.1
• AMN Healthcare, Inc. v. Aya Healthcare Services, Inc.
• Edwards v. Arthur Andersen LLP
• Ixchel Pharma, LLC v. Biogen, Inc.