The Frequently Asked Questions (FAQs) provided below highlight topics and specific questions that are often asked of the Illinois Department of Labor (IDOL). This sample form is for guidance only related to the content required.Formatting and other visual characteristic of the form are the employer's responsibility. Learn how to run a bonus payroll and accurately calculate bonus pay and taxes with our comprehensive small business guide. This fact sheet provides general information regarding bonuses and the regular rate of pay under the FLSA for non-exempt employees. Section 300.500 - Earned Bonuses. A bonus is compensation given in addition to the required compensation for services performed. Use the Illinois bonus tax calculator to determine how much tax will be withheld from your bonus payment using supplemental tax rates. Follow lump-sum guidelines for reporting gift cards given as a bonus (i.e. Perfect attendance).