When an employee works for two or more employers, each employer must pay FICA on wages paid to that employee up to the taxable wage limit, but when two or more related corporations concurrently employ the same individual and pay that individual through a common paymaster, FICA may be figured as though the individual had only one employer - the common paymaster. The wages paid by each corporation are combined for the purposes of the taxable wage limit and FICA is paid based on the combined wages. It must be emphasized that employment must be concurrent. The common paymaster rule no longer applies if the employee leaves one employer to work full time for another. The common paymaster is, therefore, any member of the group of corporations that pays wages to an employee of the related corporations. The common paymaster is responsible for keeping books and payroll records and for filing information and tax returns.