Trinet Group Inc outsourced payroll and human capital management solutions for small and midsize businesses via a professional employer organization model. Under the PEO model, TriNet enters a co-employment arrangement and acts as the employer of record for administrative and regulatory purposes for clients' employees, known as worksite employees. Clients leverage the scale and expertise of TriNet to access competitive employee benefits, share employment risk liability, access compliance support, and outsource mission-critical day-to-day HR functions such as payroll and tax administration. Following the acquisition of Zenefits and Clarus R+D in 2022, TriNet derives the minority of its revenue from self-service HCM software and R&D tax credit services.