LLC Costs in Illinois (IL)
$350 all-in for your first year - $150 to file, $75 annual report, plus a registered agent. Illinois is $33 (9%) cheaper than the national average for first-year LLC costs.
Annual report is due before the first day of the LLC's anniversary month. Illinois has the Chicago area which offers access to major markets and talent.
Updated 2025 · Source: Illinois Secretary of State
The verdict
Forming an LLC in Illinois costs about $350 in the first year - about 9% below the national average, ranking #35 of 51. Form where you actually operate, out-of-state filing usually adds foreign-registration fees that erase any savings.
Filing fee, annual report and publication rules from the Illinois Secretary of State; registered agent normalized at $125/yr. How we calculate →
Complete Cost Breakdown
- State filing fee $150
- Annual Report (yr 1) $75
- Registered agent $125
| Cost Item | Amount |
|---|---|
| State Filing Fee | $150 |
| Annual Report | $75 |
| Registered Agent | $125/yr |
| Expedited Filing (optional) | $100 |
| Total, First Year | $350 |
Cheap to start vs. cheap to keep
The one-time filing fee and the recurring annual fee pull in different directions. Here's where Illinois sits against other notable states, bubble size is total first-year cost.
Filing fee vs annual report fee by state, with Illinois highlighted. Source: each Secretary of State.
Where Illinois sits in the national range
First-year LLC cost is 32% cheaper than the rest of the country - Illinois ranks #35 of 51. Every tick is a state; Illinois is the marked one.
What Illinois LLC Costs Really Mean for Small Business Owners
Illinois charges a $150 filing fee to form an LLC and charges $75 annually for the Annual Report. Including a registered agent ($125/yr), the total first-year cost is $350. State filing fees alone range from about $40 (Kentucky) to $500 (Massachusetts); once the first-year annual report, a registered agent, and any mandatory publication are included, total first-year costs run from roughly $175 (Arizona) to over $1,834 (New York). Illinois ranks #35 of 51 states on total first-year cost, which is 9% below the national average of $383.
According to the U.S. Census Bureau's Business Formation Statistics, Americans filed more than 5 million business applications in 2024, with LLC filings accounting for the majority of new formal business entities. The LLC structure is popular because it provides limited liability protection like a corporation while allowing pass-through taxation (profits flow to the owner's personal return via Schedule C, K-1, or 1040), avoiding the double taxation of C-corps, and it has become the default entity choice for most new small businesses. Illinois offers online filing through the Secretary of State, which typically processes faster than paper submissions. Standard processing in Illinois runs 10 business days, with expedited service available for an additional $100 reducing this to 24 hours.
Budget beyond the state's direct fees. Most small business owners also spend $500–$2,000 in year one on general liability insurance, $50–$500 on business licenses and permits (varies by city and industry), and optionally $0–$500 on operating agreement templates or attorney review. Federal EIN applications are free through the IRS. If you plan to hire employees, add state unemployment tax registration and workers' compensation insurance. The total "all-in" cost to launch a functional LLC in Illinois - fees, insurance, licensing, and basic setup, typically lands between $850 and $2,850 in year one, depending on industry and coverage choices. Verify all current fees directly with the Illinois Secretary of State at https://www.ilsos.gov before filing, as rates can change with each budget cycle.
How to Form an LLC in Illinois
Your LLC name must include "Limited Liability Company", "LLC", or "L.L.C." and be distinguishable from other businesses registered in Illinois. Check name availability on the Illinois Secretary of State website before filing.
Every Illinois LLC must have a registered agent with a physical street address in Illinois. You can serve as your own agent, use a business member, or hire a professional registered agent service (~$125/year).
Submit your Articles of Organization (sometimes called Certificate of Organization or Certificate of Formation) to the Illinois Secretary of State online. The filing fee is $150. Standard processing time is 10 business days. Expedited filing ($100) reduces this to 24 hours.
While not always required by Illinois law, an operating agreement is strongly recommended. It defines ownership percentages, management structure, profit distribution, and procedures for adding members or dissolving the LLC. Keep this document internally, you don't file it with the state.
Apply for a federal Employer Identification Number (EIN) from the IRS, it's free and takes minutes online. You'll need your EIN to open a business bank account, hire employees, and file federal taxes. Keep your business finances completely separate from personal accounts.
Illinois requires LLCs to file a Annual Report annually. The fee is $75. Failing to file can result in your LLC being administratively dissolved.
How Illinois Compares
Illinois is $33 (9%) cheaper than the national average for first-year LLC costs.
Cost rank: #35 out of 51 states (#1 = cheapest).
Common Questions About Illinois LLCs
How long does it take to form an LLC in Illinois?
Standard processing time is 10 business days. Expedited service costs $100 and reduces this to 24 hours. Online filing, when available, often processes faster than paper filing.
How much does the Illinois annual LLC fee cost?
Illinois requires a Annual Report annually. The fee is $75.
Can I file my Illinois LLC online?
Yes - Illinois offers online LLC filing through the Secretary of State's website at https://www.ilsos.gov. Online filing is generally faster than paper filing.
Do I need an attorney to form an LLC in Illinois?
No, you can form an LLC in Illinois without an attorney by filing directly with the Secretary of State. However, consulting an attorney is recommended for complex ownership structures, operating agreements, industry-specific regulations, or multi-state operations. Attorney fees are not included in our cost estimates.
Illinois LLC Quick Facts
Similar Cost States
Lower-Cost Alternatives
States with lower first-year costs (may require foreign LLC registration if operating in IL):
Compare All States
See how Illinois stacks up against all 50 states and DC in one sortable table.
View Full ComparisonRead our methodology - how this data is sourced, computed, and verified.
Sources used on this page
- Illinois Secretary of State - LLC filing fee, annual-report requirement, and processing time. www.ilsos.gov
- Federation of Tax Administrators - cross-check of state fee and tax figures. taxadmin.org
- IRS - federal EIN application and pass-through taxation guidance for LLCs. irs.gov/small-businesses
- U.S. Census Bureau Business Formation Statistics - national context on new business applications. census.gov