|Tax Bracket (Single)||Marginal Tax Rate|
|Tax Bracket (Married)||Marginal Tax Rate|
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Illinois has two marginal tax brackets, ranging from 5.00% (the lowest Illinois tax bracket) to 5.00% (the highest Illinois tax bracket). Each marginal rate only applies to earnings within the applicable marginal tax bracket, which are the same in Illinois for single filers and couples filing jointly. The Federal Income Tax, by contrast, has different tax brackets for married, single, and Head of Household taxpayers.
Our Illinois tax brackets have been updated for tax year 2014. States often adjust their tax brackets on a yearly basis, so make sure you are using the current 2014 tax brackets!
Your 2014 income tax return is due on April 15th, 2015. The IRS and Illinois are now accepting eFiled returns and processing refunds, so you can start your online tax return today for free with TurboTax.
If you would like to file your Illinois income tax return by mail, you can download 2014 Illinois tax forms here.
Technically, you don't have just one "tax bracket" - you pay all of the Illinois marginal tax rates from the lowest tax bracket to the tax bracket in which you earned your last dollar. For comparison purposes, however, your Illinois tax bracket is the tax bracket in which your last earned dollar in any given tax period falls.
You can think of the bracketed income tax as a flat amount for all of the money you earned up to your highest tax bracket, plus a marginal percentage of any amount you earned over that.
You can use the income tax estimator to the left to calculate your approximate Illinois and Federal income tax based on the most recent tax brackets.
Keep in mind that this estimator assumes all income is from wages, assumes the standard deduction, and does not account for tax credits.
For a more detailed estimate that takes these factors into account, click "View Detailed Estimate" (this will will redirect to an external website).Deductions
When calculating your Illinois income tax, keep in mind that the Illinois state income tax brackets are only applied to your adjusted gross income (AGI) after you have made any qualifying deductions.
Qualifying deductions might include an itemized deduction, the Illinois standard deduction, exemptions for dependants, business expenses, etc.
Remember that Illinois may have very different deduction laws from the Federal Income Tax, so you may have to write a whole new list of deductions for your Illinois income tax return.
|Download a .CSV file of the Illinois income tax brackets|
|Download or print Illinois income tax forms|
- The Illinois tax brackets on this page were last updated from the Illinois Department of Revenue in November, 2012. Please contact us if any of our Illinois tax data is incorrect or out of date.
- Illinois tax return forms are available from the TaxFormFinder.org or the Illinois Department of Revenue.
- Before the official 2015 Illinois income tax brackets are released, the brackets used on this page are an estimate based on the previous year's brackets. These numbers are subject to change if new Illinois tax tables are released.
- The income tax estimator tool is provided by Tax-Rates.org.