How do I Register my Business?
To Register
Register with IDOR before you make any sales or when
you hire an employee. For those businesses that have sales or use
tax liability in Illinois, you will receive a Certificate of Registration
that must be displayed in a prominent location in the place of business
to which it applies. To register your business and receive your Certificate
of Registration and Illinois Business Tax number (i.e., your
“tax” number or IBT no.), you have these options: - Register electronically with on-line Business Registration application (1-2 days)
- Complete and mail Form REG-1, Illinois Business Registration Application (6-8 weeks)
- Visit a Regional Office where your application will be processed in 1 to 2 business days.
Note: Certain tax types may have additional
registration or bonding requirements. If additional information
is required for your particular registration, the department will
contact you.
Note: Illinois Business Tax (IBT) numbers eventually will be replaced by Account IDs when that tax is included in the new system. At the end of the four-year transition period, use of the term “IBT” will be discontinued.
It is recommended that you contact other federal and state agencies
and your units of local government (county, municipal, mass transit
districts, etc.) to learn if you must register your business with
them.
Find answers to your frequently asked tax questions and more with
our Taxpayer
Answer Center. If you are unable to find your answer after searching
the Taxpayer Answer Center, you will be able to email us through this system by clicking the "Send an Email"
Tab at the top of the screen.
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our new and improved Search engine.
