How Much Does It Cost to Start a Business in Illinois

How Much Does It Cost to Start a Business in Illinois

How Much Does It Cost to Start a Business in Illinois

Starting a business in Illinois comes down to three cost buckets: the initial formation filing, state registration and licensing, and ongoing compliance. The actual number depends on your business structure, industry, and whether you hire professionals to handle paperwork. This guide breaks down every fee you'll encounter.

Illinois LLC Formation Costs

An LLC is the most common choice for new Illinois businesses. Here's what you pay:

  • Articles of Organization filing: $150 (Form LLC-5.5) for standard 10-business-day processing, or $250 for 24-hour expedited service. You file this with the Illinois Secretary of State Department of Business Services.
  • Name reservation: $25 if you want to reserve a name before filing (optional, lasts 90 days). This is useful if you're not ready to form yet but want to lock in your chosen name.
  • Annual report: $75 due every year before the first day of your LLC anniversary month. File Form LLC-50.1. The Secretary of State mails a pre-filled version about 45 days before the deadline.

Total first-year cost: $150 to $250 for filing, plus $75 annual report. Year two and beyond: $75 annually (plus any professional fees if you use a registered agent or accountant).

Illinois imposes no franchise tax on LLCs. If your LLC is taxed as a partnership, you pay only the 1.5% personal property replacement tax on net income to the Department of Revenue. If you elect corporate taxation (C corp treatment), you'll owe the 7% corporate income tax plus the 2.5% replacement tax.

Illinois Corporation Formation Costs

Forming a C corporation or S corporation carries the same filing fees as an LLC:

  • Articles of Incorporation: $150 (Form BCA 2.10) for standard filing, or $250 expedited.
  • Annual report: $75 per year (Form BCA 14.05-D). This is due within the 60 days immediately before your corporation anniversary month. Failure to file by the anniversary month deadline is grounds for administrative dissolution.

Corporations also face a franchise tax: 0.1% of Illinois paid-in capital with a $25 minimum. However, new rules that take effect January 1, 2025 include a $10,000 liability exemption, so most small corporations owe $0 in franchise tax.

Registered Agent Costs

Illinois requires every LLC and corporation to maintain a registered agent, which is a person or business that receives official Secretary of State correspondence on your behalf. The registered agent must be either an individual who lives in Illinois or an entity authorized to transact business in Illinois. The registered office must have a street or road address in Illinois (a P.O. Box alone is not accepted).

You have two options:

  • Self-service: You can be your own registered agent at no cost, though you'll need a physical Illinois address where you actually receive mail.
  • Professional registered agent service: Third-party providers (like registered agent companies) typically charge $75 to $300 per year. Changing your registered agent costs $25 (Form LLC-1.36/1.37 for LLCs or Form BCA 5.10/5.20 for corporations).

DBA (Assumed Business Name) Costs

If you want to operate under a name different from your legal entity name, you need to file an assumed business name (DBA).

For LLCs and corporations: File with the Illinois Secretary of State (Form LLC-1.20 or BCA 4.15/4.20). The fee depends on your renewal cycle:

  • $150 for years ending in 0 or 5 (every 5 years)
  • $120 for years ending in 1 or 6
  • $90 for years ending in 2 or 7
  • $60 for years ending in 3 or 8
  • $30 for years ending in 4 or 9

For sole proprietorships and general partnerships: File an assumed business name certificate with the County Clerk in every county where you operate. The statutory fee is $5.00 per county, but counties add their own recording and publication costs. You must also publish notice in a newspaper of general circulation once a week for 3 consecutive weeks.

State Registration and Licensing

Illinois has no single general statewide business license. Instead, you'll likely need:

  • Illinois Department of Revenue registration: Free. Register through MyTax Illinois (Form REG-1) to get a Certificate of Registration, especially if you collect sales tax. Processing takes 1 to 2 business days online or 4 to 6 weeks by mail. Retailers must display this certificate at their place of business.
  • Local business license or permit: Many counties, cities, and villages require their own local business license on top of any state registration. Costs vary widely by jurisdiction, typically $50 to $500 annually.
  • Industry-specific licenses: Regulated occupations (accounting, law, real estate, insurance, medical services) license through the Illinois Department of Financial and Professional Regulation. Liquor, day care, private vocational schools, and common carriers each license through separate state agencies. Costs vary by field, from $100 to $1,000+.

Annual Compliance and Ongoing Costs

Beyond the initial filing, budget for these recurring expenses:

  • Annual report: $75 every year for either an LLC or corporation.
  • Registered agent service: $75 to $300 per year if you use a third-party provider (optional).
  • Income tax filing: Depends on your business structure and complexity. S corporations and partnerships must file a pass-through entity return with Illinois even if they owe no state income tax. LLCs taxed as a partnership file Schedule K-1.
  • Local licensing renewal: Varies by municipality and industry.

Tax Obligations and Their Costs

Illinois' tax landscape affects your ongoing costs:

  • Personal income tax: 4.95% flat rate for all individuals, including business owners who draw W-2 wages or distributions.
  • Sales tax: 6.25% state rate (local rates can push this higher). Required if your business sells taxable goods or services. You must file sales tax returns monthly, quarterly, or annually depending on your revenue volume.
  • Corporate income tax: 7% plus a 2.5% personal property replacement tax for C corporations. S corporations and partnerships owe only the 1.5% replacement tax on net income.
  • Optional pass-through entity tax: 4.95% flat rate as an alternative to personal income tax. Only available to S corporations, partnerships, LLCs taxed as partnerships, and sole proprietorships.
  • Franchise tax: 0.1% of paid-in capital (minimum $25) for corporations, though the $10,000 exemption effective 2025 means most small businesses owe $0.

Professional Services and Hidden Costs

Many new business owners hire professionals to handle formation and compliance. Budget for these optional services:

  • Attorney consultation: $200 to $500 for reviewing your structure choice, especially if your business involves multiple owners, significant liability risk, or complex tax situations.
  • LLC formation service: $50 to $300 if you use an online service (in addition to the state filing fee).
  • CPA or bookkeeper: $500 to $2,000 annually for tax return preparation and bookkeeping, depending on complexity.
  • Business license expediting: Some counties offer expedited processing for an additional fee.

Cost Comparison by Business Structure

Here's a rough first-year total for each structure, assuming you self-serve as your registered agent and file your own paperwork:

Business Structure Formation Filing Annual Report State Registration Estimated Total
LLC (standard) $150 $75 Free (IDOR) $225
LLC (expedited 24 hours) $250 $75 Free (IDOR) $325
C Corporation $150 $75 Free (IDOR) $225
Sole Proprietorship (DBA only) $150 (SOS) $150 (SOS renewal) Free (IDOR) $300

Note: Local licensing and professional services are not included. Add $50 to $500+ for local permits depending on your city and industry.

Cost-Saving Strategies

Keep these costs as low as possible:

  • File online. The Illinois Secretary of State online filing portal is free and faster than mail. Standard processing takes 10 business days.
  • Be your own registered agent. If you have a physical Illinois address, you save $75 to $300 per year by serving as your own agent.
  • Combine your registered agent address with your principal office. This eliminates the need for a separate business address (unless local law requires one).
  • Use the correct entity form the first time. Fixing filing errors or converting between structures later is more expensive than getting it right upfront.
  • Check with your city or county. Some Illinois municipalities offer fee waivers or discounts for new businesses. Ask when you apply for your local license.
  • Hire a professional only when necessary. DIY filing works fine if your business is straightforward. Hire an attorney or accountant only if you have co-owners, significant liability exposure, or complex tax situations.

Key Resources

Disclaimer

This guide is informational only and is not legal or tax advice. Illinois business formation rules, tax codes, and licensing requirements change periodically. Specific costs vary by industry and local jurisdiction. Before you file, consult with a qualified attorney regarding your business structure choice and with a CPA regarding tax implications. The Illinois Secretary of State and Department of Revenue websites are the authoritative source for current fees and requirements.

Next Steps

Once you understand the costs involved, follow this sequence:

  1. Search available names at the Illinois Secretary of State database (free).
  2. Decide your business structure (LLC, corporation, or sole proprietorship). Consult a CPA if your situation is complex.
  3. Reserve your name if you're not ready to file immediately ($25, optional).
  4. File your Articles of Organization or Incorporation online ($150 or $250 expedited).
  5. Register with the Illinois Department of Revenue (free) for a Certificate of Registration and sales tax permit if applicable.
  6. Check with your city or county for local business licensing requirements and apply.
  7. File your annual report before your LLC or corporation anniversary month each year ($75).

Starting a business in Illinois costs as little as $225 if you file your own paperwork and don't need professional services. Most small business owners spend $300 to $500 in state and local fees in their first year, plus whatever they spend on professional advice, which is optional but highly recommended for complex situations.