Wage Bracket Percentage Method Table for Computing Income Tax Withholding From Gross Wages (For Wages Paid in 2006)--continued. Summary: This table is for figuring income tax withholding from gross wages: using the payroll period, filing status (Single or Married), number of allowances, and gross wages, determine what amount is to be subtracted from gross wages (if gross wages are less than the amount to be subtracted, the withholding is zero), and the percentage by which the result will be multiplied. This section of the table is for a semimonthly payroll period.