When an employee raises a complaint about wages, working conditions, discrimination, harassment, safety, or another workplace issue, how the employer responds can become just as important as the underlying complaint. California law protects employees from retaliation for exercising certain workplace rights, including raising concerns about workplace conditions or participating in investigations. In 2026, California also implemented the Workplace Know Your Rights Act, which requires employers to provide employees with an annual notice explaining several workplace protections, including protection from retaliation.