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Incorporator Research Center | State Filing Requirements Center
Illinois Corporation & LLC Filing Requirements
The following is provided for informational purposes only and should not replace the advice of professional counsel. Although we make every effort to keep the information presented here up to date, states continuously change their policies, forms, fees, and information. Because of this, we make no guarantees as to the accuracy of the information presented in this current revision. Please report any problems you may encounter with moved or broken links on this page by clicking here. (Make sure to include the state and the defective link names in your e-mail.) Last update: June 22, 2010
General Info
Agencies
If you have further questions regarding business filings or fees, need additional filing forms, or want to contact your state's business division, here is the agency's contact information.
Secretary of State Office
Michael J. Howlett Building
501 S. 2nd Street, Room 350
Springfield, IL 62756
(217) 782-6961
http://www.cyberdriveillinois.com/departments/business_services/home.html
If you have further questions regarding business taxes, need additional tax forms, or want to communicate with your state's tax division, here is the agency's contact information.
Department of Revenue
Willard Ice Building
101 West Jefferson Street
Springfield, IL 62702
(217) 782-3336
1-800-732-8866
http://www.revenue.state.il.us/
Illinois State Statutes
To research the State Statutes for Illinois Corporations and Partnerships, click here.
To research the State Statutes for Illinois LLCs, click here.
Licensing
Business Licenses
Contact your state or local agencies regarding licensing issues.
Annual Filing Requirements
Annual Reports
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Fee: |
The Annual Report filing fee is $75. The annual franchise tax, included on the annual report, is computed by multiplying your corporation's paid-in capital by the franchise tax rate of 0.1%. The minimum tax is $25 and is NOT part of the $75 filing fee.
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Forms: |
Domestic Corporation Annual Report - Annual Report
Foreign Corporation Annual Report - Annual Report
E-File Annual Report - Annual Report E-Filing Directions |
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Due Date: |
An annual report form must be filed each year within 60 days immediately preceding the first day of the anniversary month of incorporating (or in the case of a corporation that has established an extended filing month, the extended filing month of the corporation each year). |
Corporation Tax Returns
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Tax: |
The income tax rate is 4.8% of the corporation's net income. In addition, Illinois assesses a personal property replacement tax based on net income (2.5% for corporations, 1.5% for S corporations and all other incorporated entities) on all businesses.
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Forms: |
Form IL-1120 - 2009 Corporation Income and Replacement Tax Return (instructions)
Form IL-1120-ST - 2009 S Corporation Income and Replacement Tax Return (instructions)
2009 Schedule K-1-P - S Corporations must file this with IL-1120-ST
Other Tax Forms - Corporate Tax Forms 1997-2009 |
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Due Date: |
Form IL-1120 (or 1120-ST) is due on or before the 15th day of the 3rd month following the close of the tax year, March 15th for calendar year filings. If the original due date of your federal return is later than the 15th day of the 3rd month, your Illinois due date will be the same as your federal due date. |
Limited Liability Company
Annual Filing Requirements
Annual Reports
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Fee: |
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Forms: |
Domestic LLC Annual Report - Annual Report
E-File Annual Report - Annual Report E-Filing Directions
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Due Date: |
An annual report form must be filed each year within 60 days immediately preceding the first day of the anniversary month of organization. |
LLC Tax Returns
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Tax: |
If you file as a corporation for federal tax purposes, you are treated as a corporation in Illinois and file IL-1120. The income tax rate is 4.8% of the company's net income. In addition, Illinois assesses a personal property replacement tax based on net income (2.5% for corporations, 1.5% for S corporations and all other incorporated entities) on all businesses. If you file as a Partnership, you will need to use form IL-1065.
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Forms: |
Form IL-1120 - 2009 Corporation Income and Replacement Tax Return (instructions)
Form IL-1065 - 2009 Partnership Replacement Tax Return (instructions)
Other Tax Forms - Business Tax Forms 1997-2009
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Due Date: |
Using Form IL-1120, taxes are due on or before the 15th day of the 3rd month following the close of the tax year, March 15th for calendar year filings.
Using Form IL-1065, taxes are due on or before the 15th day of the 4th month following the close of the tax year, April 15th for calendar year filings. |
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