If wages are paid to an employee for a payroll period of more than one year, for the purpose of determining the amount of tax required to be deducted and withheld in respect of such wages—
§ 31.3402(g)-2(a) Under the percentage method, the amount of the tax shall be determined as if such payroll period constituted an annual payroll period, and
§ 31.3402(g)-2(b) Under the wage bracket method, the amount of the tax shall be determined as if such payroll period constituted a miscellaneous payroll period of 365 days.