Illinois Flag - We have tax reminders for IL

Illinois Withholding Income Tax Return (IL-941)

  1. Home
  2. Illinois
  3. Withholding Income Tax Return

IL IL-941 Information

You must file Form IL-941 if you paid amounts subject to Illinois withholding income tax (either required or by voluntary agreement), such as: • Wages and other employee compensation including bonus, overtime, and commission pay, usually reported to the recipient on a Form W-2. • Non-wage income such as pensions, annuities, unemployment income, and sick pay that you have agreed to voluntarily withhold, usually reported to a recipient on a Form 1099. • Gambling and lottery winnings (paid by the entity issuing the winnings such as the Illinois Lottery or a casino), usually reported to a recipient on a Form W-2G. • Amounts paid to purchase rights to Illinois lottery winnings reported on a Form 1099-MISC.

Link to official form info:

Link to official form info for IL-941

Tax Reminder works year round to keep official tax form info up-to-date for Illinois and the rest of the USA. The IRS and states change their forms often, so we do the hard work for you of figuring out where the official form info is located.

To access the official link to form IL IL-941 and get reminded when it's due, sign up for a free Tax Reminder account:

  • Upcoming Due Dates in the Next Year:*
  • Monday Feb 01, 2027

  • Create a free account to see exactly when to file this form, receive email or SMS notification reminders, and to keep a record of filing it in your history.
    * Due dates are based on the filing requirements for this form and may vary depending on your tax year.

Never forget to file IL IL-941 again.

10 Illinois Tax Filings & Forms:

IL-1040 - Individual Income Tax Return IL 1040/Sch.NR - Nonresident and Part-Year Resident Computation of Illinois Tax IL-1120 - Corporation Income and Replacement Tax Return IL-1120-ST - Small Business Corporation Replacement Tax Return IL-1065 - Partnership Replacement Tax Return IL-941 - Withholding Income Tax Return IL-501 - Department of Revenue Payment Coupon IU-3/40 - Employer's Contribution and Wage Report IL-941 - Withholding Income Tax Return ST-1 - Sales and Use Tax and E911 Surcharge Return
Are we missing a Illinois tax form?

If we're missing the form you need, help us help you! Suggest a form we should include!