Illinois Income Tax Brackets (Tax Year 2018)

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Federal Tax Reform: In December 2017, congress passed a sweeping federal income tax overhaul that affects personal income tax rates from tax year 2018 onward. This page shows the new federal tax brackets for tax year 2018, which will apply to personal tax returns filed in April 2019. The full text of the "2017 TAX CUTS AND JOBS ACT" can be found here

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This page shows Tax-Brackets.org's archived Illinois tax brackets for tax year 2018. This means that these brackets applied to all income earned in 2018, and the tax return that uses these tax rates was due in April 2019.

Illinois' income tax rates were last changed three years prior to 2019 for tax year 2016, and the tax brackets have not been changed since at least 2001.

2019 Illinois Tax Deduction Amounts

Tax-Brackets.org also maintains an archive of important Illinois income tax exemption amounts, including the Illinois Standard Deduction, the Illinois Personal Exemption, and the Illinois Dependent Deduction. The values of these deductions for tax year 2018 are as follows:

Sources & Citations

Disclaimer: While we do our best to keep our historical Illinois income tax rates up to date and complete, we cannot be held liable for errors or omissions. Is info on this page missing or out-of-date? Please let us know so we can fix it!

Tax Data Sources:

1. The Illinois tax brackets on this page sourced from the Illinois Department of Revenue for 2019. Please contact us if any of our Illinois tax data is incorrect or out of date.