2018 Gross-Up Worksheet
* Gross Up Amount: This is the amount that the department needs to pay that will show on the employee’s check before withholdings.
NOTE: The gross-up calculation is an estimate using the IRS supplemental tax rate of 22 percent for 2018. This is an average tax rate, since each employee is normally taxed according to the information provided on their IRS Form W-4, with the exception of Superior Accomplishment Awards and awards provided using the AWD earnings code (beginning August 11, 2017), which are now taxed at the supplemental tax rate of 22 percent for 2018. Some employees are also subject to the annual wage based limit for paying Social Security taxes. The OASDI wage based limit for 2018 is $128,400.