Fill in the Blanks Federal payroll withholding Online version Fill in the blanks to see if you are a master of the realm of federal payroll withholding taxes. by Debera Salam 1 $1million Security 2 Medicare supplemental 39 Additional $1million Social $200 Medicare A rate of 6 . 2% applies to tax , 1 . 45% to tax and 0 . 9% to tax . A rate of . 35% applies to wages in excess of , 000 . A rate of 25% applies to wages of less than and . 6% for wages in excess of .