This calculator helps you determine the gross paycheck needed to provide a required net amount. First, enter the net paycheck you require. Then enter your current payroll information and deductions. We will then calculate the gross pay amount required to achieve your net paycheck. Withholding schedules, rules and rates are from “IRS Publication 15” and “IRS Publication 15T”. This calculator uses the redesigned W-4 created to comply with the elimination of exemptions in the Tax Cuts and Jobs Act (TCJA).