How the Kansas estimate works
Enter gross pay for one pay period, federal W-4 adjustments, and the state details shown above. Federal withholding follows Publication 15-T. Kansas subtracts the KW-100 pay-period value of the employee’s K-4 allowances, then applies the Single or Joint percentage table for the selected pay frequency. The first Single allowance and the first two Joint allowances use the larger personal-exemption value; later allowances use the dependent value. The employee may also use the official optional whole-dollar rounding method and request an additional amount.
Example: The official KW-100 example uses $2,000 of semimonthly wages, the Joint allowance rate, and three allowances. The $860 allowance amount leaves $1,140; 5.2% of the amount over $343 produces $41.44 of Kansas withholding, or $41 when the optional whole-dollar method is used. The calculator does not assume any unentered benefit deduction or invent a tax result.
Weekly, biweekly, semimonthly, and monthly are the supported paycheck frequencies. “Annual salary” is an earnings input and the annual view is a simple period multiplication; neither is an annual payroll-period method. The special Form W-4 adjustment for nonresident aliens is not modeled.