TriNet is a professional employer organization and human capital management service provider that serves small and medium-sized businesses by acting as a co-employer, handling payroll processing, employment tax administration, benefits administration, and HR infrastructure on behalf of client worksite employees. The company operates through PEO services—where it assumes employer responsibilities while clients retain operational control—and Administrative Services Organization offerings for clients who maintain direct employer status, along with related HCM solutions including tax credit support and workers' compensation services. TriNet generates revenue from service fees based on the number of worksite employees served, employee benefits revenue from health and retirement plans, investment income earned on client funds held temporarily pending remittance, and insurance-related revenues, enabling SMBs across diverse industries to access enterprise-level HR capabilities and employee benefits typically unavailable to smaller employers.