Illinois reg 1 form 2026

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The document is the Illinois Business Registration Application (REG-1) provided by the Illinois Department of Revenue. It outlines the steps for registering a business in Illinois, including identifying the business type, providing owner and officer information, describing business activities, and signing the application. It also includes instructions for using MyTax Illinois for faster registration and details on various tax obligations.

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Click ‘Get Form’ to open the Illinois REG-1 form in the editor.
Begin by identifying your business or organization. Enter your Federal Employer Identification Number (FEIN) or Social Security Number (SSN) if applicable. Select the appropriate organization type from the provided options.
Fill in your legal business name and any 'Doing Business As' (DBA) names. Ensure you provide a complete mailing address, including apartment or suite numbers, city, state, and ZIP code.
In Step 2, identify your owners and officers. Depending on your organization type, list the required individuals along with their titles, contact information, and ownership percentages.
Describe your business activities in Step 3. Include your North American Industry Classification System (NAICS) number and indicate whether you will have employees in Illinois.
Finally, sign the form in Step 4 under penalties of perjury. Ensure all information is accurate before submitting it to the Central Registration Division.

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Versions	Form popularity	Fillable & printable
2022	4.8 Satisfied (132 Votes)
2020	4.3 Satisfied (48 Votes)
2015	4 Satisfied (44 Votes)

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We have answers to the most popular questions from our customers. If you can't find an answer to your question, please contact us.

Do you have to register your LLC every year in Illinois?

If you register an LLC in Illinois, you must file an annual report. This includes LLCs formed under Illinois law and also LLCs from other states that have registered with the Illinois Secretary of State.

How much does it cost to renew your LLC in Illinois?

An LLC can operate indefinitely as long as it continues to comply with legal requirements and maintain its business activities. Unlike some business structures, an LLC has no predefined expiration date. However, its duration may be subject to state regulations and the terms specified in its operating agreement.

Where can I get an Illinois tax form?

Visit our website at tax.illinois.gov to obtain a copy.

Do you have to renew your LLC every year in Illinois?

All establishments are required to submit an annual renewal application with the applicable licensure fee.

What happens if you dont renew your LLC every year?

If you fail to renew your LLC, you subject the business to: Dissolution (business closure) Loss of financing options. Lose ability to legally conduct business. Loss of your liability protection.

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What is a reg 1 form in Illinois?

The REG-1 is the official business registration form used by the Illinois Department of Revenue (IDOR). Its how businesses register to collect sales tax, pay employee withholding, and report other state taxes.

How to print an Illinois certificate of registration?

MyTax Illinois is the primary method you should use to obtain and print a copy of your Certificate of Registration or License. From your MyTax Account, the Certificate of Registration or License is located by selecting View more account options and then View Account Letters in the Letters and Messages panel.

Illinois reg 1 form 2026

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Do you have to register your LLC every year in Illinois?

How much does it cost to renew your LLC in Illinois?

Where can I get an Illinois tax form?

Do you have to renew your LLC every year in Illinois?

What happens if you dont renew your LLC every year?

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