State of Illinois Income Tax Illinois State Income Tax
Tax Year 2023

1.1 -

QuickFact: The average family pays $2,100.00 in Illinois income taxes. [1]
Rank: 11th out of 51

Illinois Income Tax Table

Tax Bracket (Single) [2] Tax Bracket (Couple) [3] Marginal Tax Rate
$0+ $0+ 4.950%

Note: Illinois' income tax has a single flat tax rate for all income.

Note: We don't currently have Illinois' income tax brackets for tax year 2024. Until updated 2024 tax rates become available for Illinois, the tax brackets shown above and used in the income tax calculator will be from tax year 2023.

Learn how marginal tax brackets work View an explanation of marginal tax brackets

Illinois Income Tax Calculator

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How to use the Illinois tax estimator How To Use This Calculator
You can use our free Illinois income tax calculator to get a good estimate of what your tax liability will be come April. On the next page, you will be able to add more details like itemized deductions, tax credits, capital gains, and more.
Please remember that the income tax code is very complicated, and while we can provide a good estimate of your Federal and Illinois income taxes, your actual tax liability may be different.

The Illinois Income Tax

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.

Illinois' maximum marginal income tax rate is the 1st highest in the United States, ranking directly below Illinois' %. You can learn more about how the Illinois income tax compares to other states' income taxes by visiting our map of income taxes by state.

The Illinois income tax was lowered from 5% to 3.75% in 2015. Previously, the tax rate was raised from 3% to 5% in early 2011 as part of a statewide plan to reduce deficits. If you expect to owe $500 or more on April 15th, you must pay your income tax to Illinois quarterly using Form IL-1040-ES.

There are 322 days left until Tax Day, on April 16th 2025. The IRS will start accepting eFiled tax returns in January 2020 - you can start your online tax return today for free with TurboTax TurboTax eFiling.

Compare the state income tax rates in Illinois with the income tax rates in

Illinois Tax Deductions

Income tax deductions are expenses that can be deducted from your gross pre-tax income. Using deductions is an excellent way to reduce your Illinois income tax and maximize your refund, so be sure to research deductions that you mey be able to claim on your Federal and Illinois tax returns. For details on specific deductions available in Illinois, see the list of Illinois income tax deductions.

4.1 - Illinois Standard Deduction

What is the IL Standard Deduction for 2024? Unlike many other states, Illinois has no standard deduction. Certain itemized deductions (including property tax, qualified charitable contributions, etc) may be allowed depending on the income level and filing type of the taxpayer. Keep in mind that not all deductions allowed on your federal income tax return are necessarily going to be allowed on your Illinois income tax return.

4.2 - Illinois Personal Exemptions

Illinois has no personal exemption. The Federal Income Tax, however, does allow a personal exemption to be deducted from your gross income if you are responsible for supporting yourself financially.

4.3 - Illinois Dependent Deduction

Unlike most states, Illinois does not have a dependent deduction. You can, however, claim dependent deductions on your Federal Tax Return.

4.4 - Illinois Itemized Deductions

Unlike the Federal income tax, the Illinois income tax does not allow itemized deductions. You may claim the Illinois standard deduction if applicable, and specific deductions may be available to Illinois taxpayers as limited deductions or tax credits.

Illinois Income Tax Forms provides easy access to five of the most commonly used Illinois income tax forms, in downloadable PDF format. For all of the tax forms we provide, visit our Illinois tax forms library or the 's tax forms page.

Free Printable Illinois Income Tax Form 1040-V Payment Voucher
Form 1040-V - Payment Voucher
Submit a completed payment voucher with all tax payments to the Illinois Department of Revenue to ensure that your payment is properly credited to your account.
Free Printable Illinois Income Tax Form IL-1040 Illinois Individual Income Tax Return
Form IL-1040 - Illinois Individual Income Tax Return
Form IL-1040 is the standard Illinois income tax return for all permanent residents of Illinois.
Free Printable Illinois Income Tax Form IL-1040-ES Estimated Income Tax Return
Form IL-1040-ES - Estimated Income Tax Return
If you owe more then $500 a year in income tax on April 15th (because of self employment or other income without tax withholding) you must file a quarterly income tax payment using the worksheet and payment voucher included in Illinois form IL-1040-ES.
Free Printable Illinois Income Tax Income Tax Instructions Illinois Income Tax Instructional Booklet
Income Tax Instructions - Illinois Income Tax Instructional Booklet
This printable booklet includes instructions for filling out your IL-1040 form
Free Printable Illinois Income Tax Schedule I-CR Illinois Credits
Schedule I-CR - Illinois Credits
If you qualify for certain tax credits that are not listed on your other tax forms, you need to file schedule CR to claim those credits.
Free Printable Illinois Tax Table
Printable Illinois Tax Table & Tax Reference provides a printable Illinois datasheet including an income tax table, a list of Illinois tax deductions, important URLs and addresses, and more. This document is in PDF format.
If you are not a resident of Illinois, have a complicated tax return, or have other specialized circumstances you may need to download additional tax forms from the website. You can find all of Illinois' 2024 income tax forms on the income tax forms page External Link.

How To File Your Illinois Income Tax Return

Once you've filled out your Illinois income tax return, you have several options for filing and paying your income tax. You can mail your return to the at the correct address below, and include your payment by check or money order. You may also electronically file your Illinois tax return through a tax preparer or using online tax software, and pay your taxes instantly using direct debit or a credit card (an additional credit card fee may apply).

Where To Send Your Illinois Tax Return

If you filled out physical tax return forms, mail your completed Illinois income tax return to the Illinois no later then April 15th. Please be sure to send your completed tax forms to the correct address for your filing type.
Income Tax Returns (With Payment), Quarterly Tax Payments
Illinois Department of Revenue
Springfield, IL 62726-0001
Income Tax Returns (Without Payment)
Illinois Department of Revenue
PO Box 1040
Galesburg, IL 61402-1040

e-Filing: Submit Your Illinois Tax Return Online

You can save time and money by electronically filing your Illinois income tax directly with the . Benefits of e-Filing your Illinois tax return include instant submission, error checking, and faster refund response times. Most tax preparers can electronically file your return for you, or you can do it yourself using free or paid income tax software, like the examples listed below.

Illinois provides the WebPay portal for all taxpayers to electronically file their IL-1040 forms. If you eFile your taxes, you can expect to receive your income tax refund sooner and will be able to get instant verification of your tax return submission.

Illinois also accepts online payments of your tax debt with credit cards and debit cards, or through a bank transfer. There is, however, a convenience fee for the use of a credit or debit card when paying your taxes.

To e-file your Illinois and Federal income tax returns, you need a piece of tax software that is certified for eFile by the IRS. While most in-depth tax software charges a fee, there are several free options available through the states, and simple versions are also offered free of charge by most tax software companies.

The two most popular tax software packages are H&R Block At Home, sold by the H&R Block tax preparation company, and TurboTax Federal & State, sold by the Intuit software company. Both companies produce multiple editions for simple to very complex tax returns, so be sure to carefully compare the features offered by each package.

Getting Your Illinois Tax Refund

Your Illinois Income Tax Refund Online

If your state tax witholdings are greater then the amount of income tax you owe the state of Illinois, you will receive an income tax refund check from the government to make up the difference.

It should take one to three weeks for your refund check to be processed after your income tax return is recieved. E-filing your return and filing early can help ensure your refund check gets sent as quickly as possible.

Once you've filed your tax return, all you have to do is wait for your refund to arrive. If you want to check the status of your Illinois tax refund, you can visit the Illinois Income Tax Refund page.


  1. Our state ranking and income tax figures are based on a family of four (married parents with two children) earning the national median household income of $50,000 per year. Deductions and personal exemptions are taken into account, but some state-specific deductions and tax credit programs may not be accounted for.
  2. Before the official 2024 Illinois income tax rates are released, provisional 2024 tax rates are based on Illinois' 2023 income tax brackets.
  3. The 2024 state personal income tax brackets are updated from the Illinois and Tax FoundationExternal Link data.
  4. Illinois tax forms are sourced from the Illinois income tax forms pageExternal Link, and are updated on a yearly basis. Please make sure the Illinois forms you are using are up-to-date.