PEOs usually work as a professional employer for their customer service staff. The customer company announces its salaries under the Federal Employer Identification Number (FEIN) of the PEO, and the staff responsibility shifts to the PEO. Employers get higher profits, sometimes at lower prices, depending on the size of the economy. Moreover: https://martinowest.com/why-do-i-need-to-work-with-a-peo-to-help-with-payroll-administration/