Learn how to run a bonus payroll and accurately calculate bonus pay and taxes with our comprehensive small business guide. Bonuses are a type of compensation paid to employees in addition to their salary, commissions, or wages.Use the Utah bonus tax calculator to determine how much tax will be withheld from your bonus payment using the aggregate method. The Office of Child Care must confirm that you are eligible for this bonus. Please provide the following information for eligibility verification. Amount: Enter the gross amount of the Bonus to be paid. Is your claim related to work performed in the state of Utah? A complete overview that makes the process of buying bonus points and preference points a breeze. Utah does not have a 'supplemental pay' withholding rate. No cities in the Beehive State have local income taxes.