USI Payroll is a Payroll and Human Resources Outsourcing Firm. We take all of the services and expertise of a large corporate HR department and provide them to small and medium business entrepreneurs in completely customizable packages. You're already outsourcing your worker's comp insurance. With USI Payroll on your side, you can consolidate all of your employee administration duties into one location. With USI Payroll working for you, you can concentrate on what really matters: increasing your company's success. USI Payroll currently has three locations in South Carolina including Myrtle Beach, Georgetown, and Charleston but serves clients throughout the US. USI Payroll, formerly UniStaff Administrative Services, is a Division of The USI Group.