Illinois Tax Brackets, Rates, and Standard Deductions

Prepare and e-File your 2021 Illinois Income Taxes here on eFile.com together with your Federal Income Tax Return. Per IRS/State regulation - not eFile.com - an Illinois state tax return can only be e-Filed together with an IRS tax return. Instruction how to only prepare a IL state return on eFile.com and then download, print sign and mail it in. 

Detailed Information about Illinois state income tax brackets and rates, standard deduction information, and tax forms by tax year etc. can be found on this page. 

Still need to prepare and file an IL return for a previous Tax Year? Find the Illinois tax forms below. You can complete and sign the forms here on eFile.com before you mail them to the Illinois Department of Taxation. For IRS or Federal back taxes, access the tax forms here.

Below find links to other important Illinois income tax return information and other related features (e.g. tax extension, amendment, etc.).

Illinois Income Tax Returns

Illinois Income Taxes
Prepare only an IL State Return without an IRS return. Details
File a 2021 Illinois Tax Amendment
Current Illinois Income Tax Forms
Illinois Tax Brackets, Rates explained
IRS Tax Brackets, Rates by Tax Year
Calculate and Estimate your IRS Income Tax Brackets and Rates with the eFile RATEucator.

Income Tax Brackets, Rates, Income Ranges, and Estimated Taxes Due

Your Illinois Income is based on a flat tax rate. When you prepare your return on eFile.com this is all calculated for you.

Illinois Tax Brackets for Tax Year 2021

2021 Illinois net income is taxed at a 4.95% flat rate.

Illinois Tax Brackets for Tax Year 2020

Your Illinois net income is taxed at a 4.95% flat rate.

Illinois Standard Deductions

Illinois does not have a state standard deduction, nor do they use the federal standard deduction amounts.

WatchIT