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What is illinois state income tax?

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Illinois collects a state income tax at a maximum marginal tax rate of %, spread across tax brackets. Unlike the Federal Income Tax, Illinois' state income tax does not provide couples filing jointly with expanded income tax brackets. read more

Illinois' income tax rates were last changed three years prior to 2016 for tax year 2013, and the tax brackets have not been changed since at least 2001. Illinois has a flat income tax rate which applies to both single and joint filers. read more

Illinois lottery winnings each time a single payment is over $1,000 for both Illinois residents and nonresidents, and other gambling winnings paid to an Illinois resident if the winnings are subject to federal income tax withholding requirements. read more

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