Illinois LLC Cost Calculator
Estimate the cost of forming and maintaining an LLC in Illinois
Illinois Calculator
Start your business right
Updated for 2025 with real Illinois rates, brackets, and regulations
Forming an LLC in Illinois costs $150 for the Articles of Organization filed with the Illinois Secretary of State, with an annual report fee of $75 due each year. A major win for Illinois business owners: the state eliminated the Illinois franchise tax effective January 1, 2024, removing what was previously a significant annual cost for LLCs (the franchise tax had been as high as $2 million for large companies). Illinois LLCs taxed as pass-through entities pay the flat 4.95% individual income tax rate on distributed profits, plus the 1.5% replacement tax (unique to Illinois). The state does NOT require LLC operating agreements by law, but they're strongly recommended. Our calculator estimates your total LLC costs including formation, annual maintenance, registered agent, and tax obligations.
Calculate Your IL Tax
First Year LLC Cost
$225
Filing Fee (Articles)
$150
Annual Report
$75/yr
Registered Agent
Self (free)
IL Franchise Tax
$0 (eliminated 2024)
Annual Ongoing
$75/yr
5-Year Total
$525
Breakdown
Insight
An Illinois LLC costs $225 in year one. Great news: Illinois eliminated its franchise tax for LLCs in 2024 — a huge reduction. Key IL requirements: (1) $150 Articles of Organization filed with IL Secretary of State; (2) $75 annual report due before the 1st day of your anniversary month; (3) You need an IL registered agent (can be yourself if you have an IL address). File online at ilsos.gov — IL processes online filings within 24-48 hours. IL has a flat 4.95% income tax on business income taxed at the individual level (LLC pass-through). S-Corp election can save on self-employment taxes above $80K net profit.
AI Explanation
What This Means
Based on default inputs, the Illinois LLC Cost Calculator shows a first year llc cost of $225. Key figures: Filing Fee (Articles): $150, Annual Report: $75/yr, Registered Agent: Self (free), IL Franchise Tax: $0 (eliminated 2024), Annual Ongoing: $75/yr, 5-Year Total: $525.
Key Insights
An Illinois LLC costs $225 in year one. Great news: Illinois eliminated its franchise tax for LLCs in 2024 — a huge reduction. Key IL requirements: (1) $150 Articles of Organization filed with IL Secretary of State; (2) $75 annual report due before the 1st day of your anniversary month; (3) You need an IL registered agent (can be yourself if you have an IL address). File online at ilsos.gov — IL processes online filings within 24-48 hours. IL has a flat 4.95% income tax on business income taxed at the individual level (LLC pass-through). S-Corp election can save on self-employment taxes above $80K net profit.
What You Can Do
Enter your actual figures in the calculator above for a personalized breakdown. Consider consulting a tax professional for comprehensive planning, especially for complex situations involving multiple income sources or deductions.
Keep In Mind
This calculator provides estimates based on 2026 rates. Actual tax liability may vary based on credits, exemptions, and other factors not captured here. This is for educational purposes only and should not be considered tax advice.
How the Illinois LLC Cost Calculator Works
The Illinois LLC Cost Calculator uses 2026 tax rates, brackets, and deductions specific to Illinois to provide you with an accurate estimate of your tax obligations. Unlike generic federal-only calculators, this tool accounts for the unique tax structure that Illinois residents face.
Formula
First-Year Cost = $150 (Articles of Organization) + $75 (Annual Report) + Registered Agent ($0-150) + Optional: EIN (free from IRS), Operating Agreement ($0-500). Annual Renewal: $75. No franchise tax (eliminated 2024).Simply enter your financial details above, and the calculator instantly computes your results using the latest available data. All calculations happen directly in your browser — your personal information is never sent to any server or stored anywhere.
Why Use a Illinois-Specific Calculator?
State-Specific Rates
Uses real 2026 Illinois tax brackets, rates, and thresholds — not generic national averages that miss state-level nuances.
Local Programs & Exemptions
Factors in Illinois-specific programs, exemptions, and deductions that national calculators simply don't account for.
Instant & Private
All calculations run locally in your browser. No account required, no data stored, no waiting for results.
AI-Powered Explanations
Get a plain-English breakdown of your results with actionable insights you can actually use for financial planning.
What's Included
Franchise Tax Eliminated
As of 2024, Illinois no longer charges franchise tax on LLCs — a major cost reduction for businesses of all sizes.
Complete Cost Breakdown
See every fee: $150 filing, $75 annual report, registered agent costs, and the 1.5% replacement tax.
State Comparison
Compare Illinois LLC costs to California ($800/yr tax), New York ($200+ publication), and neighboring states.
Tax Obligation Estimator
Calculate your pass-through tax burden at 4.95% income tax plus 1.5% replacement tax on LLC profits.
Frequently Asked Questions
How much does it cost to form an LLC in Illinois?
Filing Articles of Organization with the Illinois Secretary of State costs $150 (online or mail). Annual report: $75 (due before the first day of the LLC's anniversary month). Registered agent: $0 if you self-designate with an Illinois address, or $50-150/yr for a service. EIN from the IRS: free. Total first year: $225 minimum. This is more than Florida ($125) but far less than California ($800/yr minimum tax).
Did Illinois eliminate the franchise tax?
Yes. Effective January 1, 2024, Illinois fully eliminated the franchise tax (also known as the personal property replacement tax on capital). This tax had been charged on the paid-in capital of corporations and LLCs, with rates up to 0.15% of paid-in capital. The phase-out began in 2020 with increasing exemption amounts. This saves businesses — especially larger ones — thousands of dollars annually.
What is the Illinois replacement tax for LLCs?
The Illinois Personal Property Replacement Tax is 1.5% on net income for partnerships and S-corporations (including LLCs taxed as such). C-corporations pay 2.5%. This is a unique Illinois tax that replaced revenue lost when the state eliminated personal property taxes in 1979. It's paid in addition to the 4.95% flat income tax, bringing the effective state tax rate on LLC profits to roughly 6.45%.
When is the Illinois LLC annual report due?
The annual report is due before the first day of the anniversary month of your LLC's formation. For example, if your LLC was formed on March 15th, your annual report is due by March 1st each year. The fee is $75. Late filing results in a penalty and eventual administrative dissolution. You can file online through the Illinois Secretary of State's CyberDriveIllinois.com website.
Is Illinois a good state to form an LLC?
Illinois is increasingly competitive since the franchise tax elimination. Pros: large consumer market (12.5M population), central US location, strong legal protections, and $150/$75 annual costs are reasonable. Cons: the 1.5% replacement tax is unique to Illinois, the combined state tax rate of ~6.45% is higher than neighboring Indiana (3.15%), and regulatory complexity can be higher in Chicago (city business license, head tax considerations).
Important Information for Illinois Residents
Tax laws in Illinois can change annually. This calculator is updated regularly to reflect the latest 2026 rates and regulations, but you should always verify important financial decisions with a qualified Illinois tax professional or CPA.
This tool is designed for informational and educational purposes. While we strive for accuracy using official Illinois Department of Taxation data, the results should be used as estimates for planning purposes only. Your actual tax liability may differ based on credits, special circumstances, and legislative changes that occur after our last update.
For filing deadlines, payment schedules, and official forms, visit the Illinois Department of Taxation and Finance website. If you have complex tax situations involving multiple states, business income, or significant investment gains, professional guidance is recommended.
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