Illinois Paycheck Calculator

Illinois imposes a flat state income tax rate of 4.95% on all wages, regardless of income level. This simplicity means Illinois workers at any earnings level face the same marginal state rate, unlike progressive states where high earners pay significantly more. However, Illinois has one of the higher property tax burdens in the nation, which indirectly affects total household tax load even if it does not appear on your paycheck.

Chicago residents are subject to additional local taxes. While Chicago does not levy a traditional income tax, it does impose a 1.25% Chicago Employers' Expense Tax (effectively on the employer side) and has additional municipal levies that affect compensation structures. Some Cook County municipalities also have local payroll-adjacent taxes.

Pre-tax deductions such as 401(k), HSA, and health premiums reduce both federal and Illinois taxable income, making them doubly valuable. Illinois follows federal guidelines for most deduction classifications with limited state-specific modifications.