This checklist is general information for owners in Cook County, Illinois. The County license applies only in unincorporated Cook County; towns, Chicago and DuPage, Kane, Will and Kendall counties have their own rules. See the overview page and the rules and numbers page.
The Boundary-Stone License Check
Owners commonly work through these steps before opening or moving a business.
- Find the boundary. Use the address check on the County's license portal, or ask the Department of Revenue, before assuming either way.
- Switch if it is a town. In a village, town or Chicago, local license and zoning rules apply instead.
- Look for another County license. Holders of another required County business license, or exempt businesses, do not need the GBL.
- Gather application items. Owner ID numbers and home addresses, property PIN, short business plan and sales-tax allocation code.
- Review the wage certification against payroll records and the Cook County minimum wage ordinance.
- Apply and pay. Use the online portal; $40 covers two years. The County FAQ says processing can take up to 30 to 45 days.
- Post the license at the premises and check its dates against the County's stated period end (28 February 2027).
- List other permits for food, liquor, tobacco, occupancy or zoning.
Common mistakes
- Operating in unincorporated Cook County without a GBL, or after it lapses.
- Assuming a GBL is needed, or not, without confirming the address is unincorporated.
- Holding a liquor or public health license and also applying for a GBL, or the reverse.
- Opening a food business without public health plan review and a license.
- Adding video gaming without updating the occupancy certificate and getting a building permit.
- Running a home business past the zoning limits on storage, floor area, employees or equipment.
- Selling property in unincorporated Cook County without a Zoning Use Certificate.
- Paying a tobacco fee without confirming it, because the Code lists two amounts.
When to talk to an attorney
A CPA cannot answer these questions. An attorney can.
- A notice of violation, license hearing, suspension, revocation or closure order.
- Liquor or video-gaming licensing, dram shop exposure, or a County Board exception to the wage certification.
- A zoning variance or special use, or a dispute over whether a site is unincorporated.
- Contesting a County tax assessment.
Frequently asked questions
Do I need a Cook County business license in Chicago or a suburb?
Not the County's General Business License, which covers unincorporated Cook County only. Chicago and incorporated towns follow their own local codes, so the village or city clerk is the place to ask.
How much is the Cook County General Business License?
The fee is $40 per license for a two-year period, currently 1 March 2025 to 28 February 2027. The Code sets the late fee equal to the license fee, and the County page states a $40 penalty.
Can I run a business from home in unincorporated Cook County?
Zoning allows a "home occupation" run by a family member who lives there. Limits include storage in at most 15% of one story's floor area, at most 25% of a story used for the business, one non-family worker at most and no accessory building. The homeowner files a no-fee affidavit with the Zoning Administrator. Towns set their own rules. For tax treatment, see our home office guide.
What happens if I operate without a license?
Once a violation is determined, the Code allows denial of County contracts, permits or licenses and/or fines of $100, $250 and $500 for a first, second and later offense, with each day after notification a separate offense. The Director may close the business until it is licensed.
A CPA can help with the payroll, tax and accounting side of licensing, such as sales-tax registration and wage records, and works alongside the owner's attorney.
Official sources
- Cook County: General Business License
- Cook County Business License Portal
- Cook County: Building and Zoning Business Occupancy
- Cook County Code of Ordinances, Chapter 54, Article X (Municode)
- Cook County Zoning Ordinance, Appendix A (Municode)
This page is a plain-language summary. The official source controls if there is any difference.