Flat Bonus Calculator
Calculates withholding on special wage payments such as bonuses by using supplemental tax rates. If your state does not have a special supplemental rate, a message will be returned. State-by state compliant for those states that allow the percent method of bonus calculations. The following states do not support this type of calculation: AZ, CT, DE, HI, KY, LA, MA, MS, NJ, UT, WY, DC, PR.