The cheapest legal way to start a business in Illinois with no money is to operate as a sole proprietor under your own legal name, which costs nothing to set up. Get a free Employer Identification Number from the IRS, register for free with the Illinois Department of Revenue if you’ll be collecting sales tax or paying employees, and you’re legally in business. Everything beyond that, from a trade name to an LLC to professional licensing, is a cost you add only when the business or the law requires it.
The $0 Start: Sole Proprietor Under Your Own Name
If you operate under your full legal name and don’t form a separate entity, Illinois requires no business formation filing. You can begin selling services today. The trade-off is real: a sole proprietorship gives you zero separation between personal and business finances, so if the business is sued or can’t pay a debt, your personal bank accounts and property are exposed.
For many service businesses starting from nothing, that risk is manageable at first, and you can upgrade to an LLC later when revenue allows the $150 fee. The practical first moves at this stage are free: get an EIN so you don’t have to put your Social Security number on invoices, open a separate bank account to keep records clean, and register with the Department of Revenue before your first taxable sale.
If You Want a Business Name: The Assumed Name Filing
The moment you operate under anything other than your full legal name, the Illinois Assumed Business Name Act requires you to file an assumed name certificate with the county clerk where the business is located.1Illinois General Assembly. Illinois Compiled Statutes 805 ILCS 405 – Assumed Business Name Act Filing fees vary by county and typically run around $10.2DuPage County. Assumed Business Names
The certificate asks for the business name, the physical street address of the business (not a P.O. Box), the type of product or service, and the names and home addresses of all owners.3Kane County Clerk’s Office. Filing an Assumed Name Certificate All owners sign in front of a notary. Illinois caps in-person notary fees at $5 per act.4Illinois General Assembly. Illinois Compiled Statutes 5 ILCS 312/3-104 – Maximum Fee
There’s a second cost people miss. After filing, you have to publish notice of the assumed name in a general-circulation newspaper in that county once a week for three consecutive weeks. The first publication has to run within 15 days of filing, and you must submit proof of publication to the county clerk within 50 days. Miss the 50-day window and the certificate is void; you start over.1Illinois General Assembly. Illinois Compiled Statutes 805 ILCS 405 – Assumed Business Name Act Publication typically runs $20 to $50. Some counties bundle filing and publication; Madison County, for example, charges $31 for the combined cost.5Madison County, IL. Registering a Business / Assumed Business Name
Before you pay anything, search the Secretary of State’s database to confirm the name is available and distinguishable from existing registrations. The search is free and saves you from paying for a filing that gets rejected.6Illinois.gov. Locate Registered Business Names
When the $150 for an LLC Is Worth It
An LLC creates the legal separation a sole proprietorship doesn’t. Your personal assets stay protected from business debts and lawsuits as long as you keep business and personal finances apart. Forming one in Illinois means filing Articles of Organization (Form LLC-5.5) with the Secretary of State and paying $150.7Illinois Secretary of State. Information for Forming an LLC Online A series LLC runs $400.
The cost most people forget is the recurring one: $75 every year for the annual report, due before the first day of the month in which the LLC was originally organized. Miss it and the LLC falls out of good standing, which can lead to administrative dissolution.8Illinois Secretary of State. File an Annual Report
If you do form an LLC on a tight budget, serve as your own registered agent. The law simply requires an individual Illinois resident or an authorized business entity with a physical Illinois street address to accept legal documents on the LLC’s behalf.9Illinois General Assembly. Illinois Compiled Statutes 805 ILCS 180/1-35 – Registered Office and Registered Agent Commercial registered agent services charge $50 to $300 a year for a job you can legally do yourself at no cost. Note that LLCs do not require the newspaper publication that assumed names do.
Free Federal and State Tax Registration
An EIN is your business’s tax ID. You need one to open a business bank account, file business taxes, or hire anyone. The IRS issues EINs for free through its website and gives you the number immediately after you finish the online application.10Internal Revenue Service. Get an Employer Identification Number Ignore third-party sites that charge for this. The application uses Form SS-4 and asks for basic owner, entity, and purpose information.11Internal Revenue Service. Instructions for Form SS-4 (12/2025)
On the state side, any business doing taxable transactions in Illinois or withholding income tax from employees has to register with the Illinois Department of Revenue. File Form REG-1 through the MyTax Illinois portal at mytax.illinois.gov. It asks for owners’ Social Security numbers, the business start date, and estimated tax liability. Registration is free and produces a Certificate of Registration authorizing you to collect and remit sales tax.12Illinois Department of Revenue. Business Registration Register before your first taxable sale to avoid penalties.
The Honest Cost Floor
- Sole proprietorship under your legal name: $0 in filing fees. Free EIN, free state tax registration.
- Sole proprietorship with a trade name: roughly $10 to $50 for the county filing, plus $20 to $50 for newspaper publication.
- LLC: $150 to form, then $75 every year. Act as your own registered agent to avoid $50 to $300 in annual service fees.
Licenses and Local Permits You Can’t Skip
Forming an entity and registering for taxes doesn’t clear you to operate. Many industries require a separate professional license first. The Illinois Department of Financial and Professional Regulation oversees licensing for dozens of professions, including cosmetologists, real estate brokers, home inspectors, barbers, roofers, massage therapists, and accountants.13IDFPR. Professions and Industries Regulated by IDFPR Education prerequisites and fees can take months to satisfy, so check IDFPR early if your field is regulated.
Industry-specific agencies add their own requirements. A landscaping business that buys nursery stock needs a $50-per-location Nursery Dealer Registration from the Illinois Department of Agriculture.14Illinois Department of Agriculture. 2026 Nursery Dealer Registration Food businesses need health department permits. Construction trades may need bonds.
Many municipalities also require a local business license, separate from any state filing. Requirements vary by city and county, so call your local clerk’s office before you open. Skipping this is a common early mistake and can bring fines or a forced shutdown.
Working From Home: Check Your Zoning
Starting from home is the obvious move when you can’t afford commercial space. Most Illinois municipalities allow home-based businesses but regulate them through zoning ordinances. Common rules limit daily customer visits, restrict exterior signage, prohibit storage of business materials visible from the street, and cap how many non-household employees can work on-site.
Some cities distinguish between low-impact home businesses (no customers, no employees) and higher-impact ones (regular foot traffic, outside employees). Freelance writing or web design typically needs no special permit. A home-based salon or tutoring center may require a home occupation permit or certificate of occupancy. Confirm with your city’s community development or zoning office that your planned activity is allowed at your address before investing time in setup.
The Moment You Hire Someone
Illinois law requires workers’ compensation insurance for virtually every employer, even if you hire just one part-time worker. Sole proprietors, business partners, and LLC members can exempt themselves from coverage, but you can’t exempt your employees.15Illinois Workers’ Compensation Commission. Insurance Operating without required coverage is a criminal offense in Illinois. Build this into your hiring timeline and your budget.
Funding When You’re Starting From Zero
Three programs are built for entrepreneurs who can’t get a conventional bank loan.
The SBA Microloan Program provides loans up to $50,000 through nonprofit intermediary lenders. Each intermediary sets its own credit standards, but microloans are generally more flexible than bank loans and can go toward working capital, inventory, supplies, or equipment.16U.S. Small Business Administration. Microloans
Advantage Illinois reduces lending risk for banks that finance small businesses, either by guaranteeing a portion of the loan or participating directly. To qualify, your business must operate in Illinois, have fewer than 750 employees, be in good standing with the Secretary of State, and have no back taxes, bankruptcies, judgments, or liens from the past five years.17Illinois Department of Commerce and Economic Opportunity. Advantage Illinois
The Illinois Department of Commerce and Economic Opportunity also runs the Small Business Capital and Infrastructure Grant Program, which awards grants for physical expansion, equipment, and infrastructure. The program prioritizes businesses owned by socially and economically disadvantaged individuals and those in Community Development Financial Institution investment areas.18Illinois Department of Commerce and Economic Opportunity. Small Business Capital and Infrastructure Grant Program Grant cycles open and close, so check the DCEO site for current windows.
Free Help That Fills the Gap Money Would Have
The Illinois Small Business Development Center network offers free, confidential one-on-one advising. Advisors help with business planning, market research, financial projections, and navigating state requirements. They won’t write the plan for you, but they’ll walk you through it and flag what’s missing.19Illinois.gov. Services – America’s SBDC Illinois SBDC centers also run free and low-cost training workshops online and in person.20Illinois.gov. Training – America’s SBDC Illinois
SCORE operates multiple Illinois chapters, including a major one in Chicago. Its volunteer mentors are experienced entrepreneurs and executives who give ongoing free advice on financing, planning, marketing, and operations by phone, video, or in person for as long as you find it useful.21U.S. Small Business Administration. SCORE Business Mentoring The DCEO’s Business Information Center can also connect you with the regulatory requirements that apply to your specific business.22Illinois Department of Commerce and Economic Opportunity. Step by Step Guide