How to Start a Business in Illinois

Financial Services - Chicago's financial district is the second-largest in the U.S., with the CME Group, CBOE, and hundreds of fintech startups driving the sector.

Manufacturing - Illinois ranks among the top five manufacturing states, producing $100+ billion in annual output across food processing, machinery, and chemicals.

Technology - The Chicago tech sector has grown 30%+ over the past five years, with major hubs in River North, West Loop, and the 1871 tech incubator ecosystem.

Healthcare - Over 750,000 workers are employed in healthcare and social assistance, making it one of the state's largest and fastest-growing sectors.

Agriculture and Food - Illinois is the nation's top producer of soybeans and second-largest corn producer, supporting a massive agribusiness and food processing industry worth $19+ billion annually.

Transportation and Logistics - The state's central location and infrastructure support over 400,000 logistics jobs, with the Chicago area serving as the nation's primary rail freight hub.

Illinois personal income tax is a flat 4.95% on all taxable income, which applies to sole proprietors, LLC members, and S-Corp shareholders. There are no graduated brackets, so you pay the same rate regardless of income level.

C-Corporations pay a 7% corporate income tax plus a 2.5% personal property replacement tax (PPRT), bringing the effective corporate rate to 9.5%. Pass-through entities (LLCs, S-Corps, partnerships) pay 1.5% PPRT on their net income.

The state sales tax rate is 6.25% on general merchandise. Qualifying food, drugs, and medical appliances are taxed at a reduced rate of 1%. Local jurisdictions add their own sales taxes, with combined rates reaching 10.25% in Chicago and 11%+ in some collar counties.

Illinois eliminated its corporate franchise tax effective January 1, 2024, saving businesses up to $2 million in annual filings. This was a major win for Illinois startups that previously owed franchise tax based on paid-in capital.

Register for all state tax obligations through the MyTax Illinois portal. Quarterly estimated payments are due on the 15th of April, June, September, and December for most businesses.

Illinois has a cost of living index of approximately 93 (national average = 100), making it slightly below the national average outside of the Chicago metro area. Downstate cities like Springfield, Peoria, and Champaign offer significantly lower operating costs for businesses that do not need a Chicago presence.

Average commercial office rent ranges from $15 to $25 per square foot in suburban areas and $30 to $55+ per square foot in Chicago's Loop and River North districts. Co-working spaces start at $200 to $400 per month for a dedicated desk.

The Illinois minimum wage is $14.00 per hour as of 2024, scheduled to reach $15.00 by January 2026. Chicago's minimum wage is already $15.80 for large employers, so budget accordingly if hiring in the city.

Utilities and energy costs in Illinois are near the national average, with commercial electricity rates around $0.10 per kWh. The state's central location also reduces shipping costs for businesses distributing products regionally or nationally.

The Illinois Small Business Development Center (SBDC) network offers free consulting, business plan assistance, and market research at over 40 locations statewide. SBDC advisors also help you prepare SBA loan applications.

The SBA Illinois District Office in Chicago connects founders with SBA 7(a) loans (up to $5 million) and microloans (up to $50,000) through approved lenders. These government-backed loans offer below-market interest rates for qualifying businesses.

The Illinois Department of Commerce and Economic Opportunity (DCEO) administers several grant and incentive programs, including the Advantage Illinois program and the Illinois Small Business COVID-19 Relief Fund. Grant amounts vary by program and funding cycle.

The Intersect Illinois initiative provides tax credits, workforce training grants, and site selection assistance for businesses expanding or relocating to the state. Check intersectillinois.org for current incentive programs and eligibility requirements.

Within your first 30 days, open your business bank account, register with the Illinois Department of Revenue for income and sales tax, and obtain any required local business licenses. If you plan to hire employees, register with the Illinois Department of Employment Security for unemployment insurance.

By day 60, finalize your business insurance policies (especially workers' comp if you have employees), set up your accounting software, and make your first estimated tax payment if applicable. Create your Google Business Profile and launch at least a basic website.

Before day 90, draft your LLC operating agreement if you have not already, establish a record-keeping system for all receipts and expenses, and calendar your annual report due date. Your first annual report is due before the first day of your LLC's anniversary month, with a $75 filing fee.