Illinois: The Prairie State

Here are some agency and other resources you can use to research payroll, tax, and business information in Illinois (IL). For other states, go to Payroll Resources.

Information Resource
Contact

Department of Revenue Contacts

Department of Employment Security Contacts

Agency Websites

Illinois Department of Revenue

Illinois Department of Employment Security

Small Business Information

Fast Facts for Employers

Booklet IL-700-T: Illinois Tax Withholding Tables (PDF)

Starting and Managing a Business

Forms

REG 1: Illinois Business Registration Application (PDF)

Illinois Business Gateway (Online business registration)

UI-50A: Notice of Change (PDF)

Form UI-1: Report to Determine Liability Under theUnemployment Insurance Act (PDF)

SUI Tax Rate Notice (Sample)

Move your mouse over the image to see an example Illinois SUI rate notice, or click here to open in a separate window.

This is only an example — see your own notice for your specific rates.

Employee State Withholding Certificate Form IL-W-4: Employee's Illinois Withholding Allowance Certificate
New Hire Reporting Illinois New Hire Reporting
Workers' Compensation Illinois Workers' Compensation

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