Il State Income Tax Rate 2025. You are able to use our illinois state tax calculator to calculate your total tax costs in the tax year 2024/25. Illinois state income tax rate for current tax year:
Unlike the federal government and many other states, illinois has no tax brackets that increase rates with income. 52,000.00 federal and illinois tax calculation example with full calculations with supporting illinois tax calculator, calculate your own tax return with full deductions and allowances for 2025 and.