Learn how to run a bonus payroll and accurately calculate bonus pay and taxes with our comprehensive small business guide. A W4 form, or "Employee's Withholding Certificate," is an IRS tax document that employees fill out and submit to their employers.Use the Minnesota bonus tax calculator to determine how much tax will be withheld from your bonus payment using supplemental tax rates. REETAIN Bonuses help supplement income for early childhood educators as they work to establish a career in the field. Only a few states have a higher top tax rate than Minnesota. On the bright side, there are no local income taxes in the Land of 10,000 Lakes. This Minnesota bonus tax calculator uses supplemental tax rates to calculate withholding on special wage payments such as bonuses. When are deer licenses or bonus permits valid if they are purchased after opening day? Profit-sharing and stock bonus plan, or IRA payments. Just like regular wages, taxes must be taken out of a bonus because Uncle Sam considers them income.