Form an LLC in Illinois.

Illinois LLC fees, line by line

Component	Cost / Rule	Note
Articles of Organization filing fee	$150	One-time charge to register the LLC with the state.
Annual report	$75 / year	Late or missed reports trigger administrative dissolution in most states.
Franchise / business tax	$0	This state has no minimum franchise tax for LLCs.
Registered agent	Required	Every state requires a registered agent. You can be your own RA in your home state at no cost; commercial services run $35–$300/yr.
Expedited filing	Available	Typical add-on $50–$100 for 1–3 day turnaround.

Should you form in this state if you don't live here?

For most operators, the answer is no. An LLC pays state income tax wherever it operates, not where it's formed. Forming in Illinois while doing business in another state means paying both states' fees plus a foreign-qualification fee in your operating state. Real reasons to form in a non-home state: pure IP holdcos, real estate holdcos in the property state, asset-protection structures, or non-US residents with no US nexus. Full breakdown of when forming out-of-state pays off →

Forming an LLC in Illinois

Entrepreneurs forming an LLC in Illinois file articles of organization with the Illinois Secretary of State's Business Services Department. The state processes filings through its online portal at sos.illinois.gov, which accepts both digital and certified mail submissions. Online filing is the faster route: most LLCs receive approval within 1–3 business days of submission. Paper filings by mail take 5–7 business days; expedited processing (2–3 business days for paper, or same-day electronic for online submissions) is available for an additional fee. The filing fee is $150 for standard processing, with expedited filings costing $300 for same-day approval or $225 for 2–3 day turnaround.

Before filing, entrepreneurs should verify name availability using the Secretary of State's online search tool. Illinois requires the LLC name to include "Limited Liability Company," "LLC," or "L.L.C." at the end. A registered agent with a physical address in Illinois is mandatory; this individual or business must be available during normal business hours and responsible for receiving legal notices. Many new owners hire a registered agent service ($100–200 annually) rather than serving themselves, especially if they plan to work remotely or maintain multiple business locations. The Secretary of State does not conduct a name publication requirement in Illinois like some states do, which speeds up the launch timeline. Illinois LLCs must file a biennial report (every two years) by the end of the month in which the LLC was formed; the report costs $75 and renews the business's good standing status.

Illinois imposes a franchise tax on LLCs, though the base rate is low. The state charges a flat annual franchise tax ranging from $60 to $150 depending on business gross receipts, with a minimum of $60 per year. For startups and small operations, this typically falls on the lower end. Owners should also be aware that Illinois does not tax LLC pass-through income at the state level (the business itself pays no tax on profits); instead, individual members report their share of profits on their personal state income tax returns. If the LLC generates over $150,000 in annual gross receipts, it may trigger additional compliance requirements, so revenue tracking from day one is prudent.

Illinois allows flexible operating agreements, and there is no requirement to file the operating agreement with the state or pay a fee for adoption. However, having a written operating agreement is strongly recommended to clarify member roles, profit distribution, and voting rights. Many first-time owners skip this step and regret it later when disputes arise. Understanding what goes into articles of organization helps ensure all required state and personal details are correct before submission. Common pitfalls include misspelling the registered agent's name or forgetting to include the LLC suffix in the business name, both of which can trigger rejection and delay formation by 1–2 weeks.

State-specific tax considerations

Illinois does not levy a corporate income tax on LLC profits, which is a significant advantage. All taxable income flows through to members' individual state income tax returns. However, Illinois imposes a personal income tax rate of 4.95% on all individual income, including LLC distributions. Members must estimate and pay quarterly estimated tax if they expect to owe $500 or more in state taxes for the year. The franchise tax (the annual $60–150 fee mentioned above) is separate from income tax and is due by the end of the month following the end of the LLC's fiscal year.

If the LLC has employees, payroll registration with the Illinois Department of Revenue is required. New hires must also be reported to the Illinois Department of Employment Security (IDES). Sales tax registration is triggered only if the LLC sells tangible personal property; service-based LLCs typically do not need to collect sales tax. Illinois has a 6.25% state sales tax base, with local municipalities adding additional points. The state issues a sales tax permit (formerly called a resale certificate) free of charge and allows online application through the Department of Revenue website. Owners should file sales tax returns monthly or quarterly depending on revenue volume; non-compliance can result in penalties and interest charges retroactively applied.

Frequently asked questions

Sources & verification

• Official: Illinois Secretary of State — business filings
• IRS — Limited Liability Company guidance

Last verified: pending. Fees can change between legislative sessions — the linked official source above is the canonical record.

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