These Cook County business license requirements apply only in unincorporated Cook County. Businesses in Aurora, Naperville and the rest of Kane, DuPage, Will and Kendall counties follow other rules; see the Kane, DuPage, Will or Kendall guide. The overview shows who is covered.
Cook County business license requirements: what the law requires
| Requirement | What the Code says |
|---|---|
| License first | Needed in unincorporated Cook County unless exempt (54-383, 54-392) |
| Sworn application | Business details, owner ID numbers and home addresses, property PIN, short plan, sales-tax allocation code (54-384) |
| Wage-law statement | No repeated or willful violation of Illinois wage laws, WARN, the FLSA or comparable state statutes admitted or found in five years, or a County Board exception (54-384, 54-391) |
| Fee, term, posting | $40, two years, displayed at the premises (54-385, 54-387, 54-388) |
| Staying compliant | Follow County rules on health, building, taxes and human relations; breaches risk suspension (54-390) |
Key numbers and dates
| Item | Amount or date | Year and source |
|---|---|---|
| License | $40 per two years | Period March 1, 2025 to February 28, 2027 |
| Late purchase | County page: $40 penalty | Payment asked by March 1, 2025 |
| Processing | Up to 30 to 45 days | County FAQ dated January 2025 |
| Fines | $100, $250, $500 per offense; daily after notification | Code 54-394, current to August 27, 2026 |
| Occupancy certificate | $250 | Building and Zoning page, October 2026 |
| Liquor application | $3,000, plus a State license | Code 32-1, 2026 |
Source: Cook County Code 32-1 and 54-394
Recent and pending changes
- March 1, 2025: the current two-year period began. The Code version we read is current to August 27, 2026.
The Pin-Before-Permit Check
- Check the address with the License Portal's address tool and note the property PIN.
- Test the three triggers (place, property, stock) and any exemption.
- Collect owner ID numbers, home addresses and shares; if an owner has no Social Security number, ask Revenue.
- Gather five years of wage-law history, the sales-tax allocation code and a plan.
- Apply on the portal, pay $40 and allow up to 30 to 45 days.
- Post the license and compare its dates with the County's period end.
- Line up occupancy, food or liquor approvals before opening.
Common mistakes
- Treating a village, Chicago or collar-county address as unincorporated Cook.
- Applying for this license while holding another County business license, or the reverse.
- Signing the wage-law statement without checking earlier findings.
- Using the old County FAQ's fee figures.
When to bring in an attorney
- A violation notice, hearing, suspension or closure order.
- A wage-law finding that may need a County Board exception.
- Liquor or video gaming licensing, or a zoning dispute.
How we can help
We handle the U.S. tax, payroll and accounting side, including sales tax registration, and work with your attorney, Canadian CPA or Indian CA. We issue no licenses and give no legal advice. See business formation and registrations and payroll and employer compliance.
Frequently asked questions
Do I need this license in Aurora or Naperville?
No. Aurora lies in Kane, DuPage, Will and Kendall counties; see the Aurora guide.
Who issues it?
The Department of Revenue issues it, not the Bureau of Economic Development; Building and Zoning issues occupancy certificates.
Does it replace other County permits?
No. Liquor, food, tobacco and occupancy approvals come from other offices.
How much is it, and how long does it last?
$40 for two years, within the County's period ending February 28, 2027.
Official sources
- Cook County: General Business License
- Cook County Code of Ordinances, Chapter 54, Article X (Municode)
- Cook County Code of Ordinances, Chapter 32, fee schedule (Municode)
- Cook County Building and Zoning: business occupancy
- Cook County Public Health: permits and licenses
This page summarizes public guidance in plain language. If anything here differs from the official source, the official source controls.