Illinois Business Calculators

Illinois Startup, Series LLC & 24-Hour Filing Costs

Entity & state form

Corp USA package

24-Hour ILSOS Expedited Review +$100 state fee

State formation fee

$150

Designations / IDFPR / expedited

Corp USA service

$149

Startup total

$299

Year 2 report forecast: $75 state + $99 service = $174. Corporation franchise tax is $0 when liability does not exceed the $1,000,000 exemption. Series LLC $599 is the umbrella price before designations.

805 ILCS 180/37-40, 50-10; 805 ILCS 5/15.35. No newspaper publication for LLC formation. Shipping and applicable tax are separate.

Start Illinois filing — $299

Illinois Entity Tax & 1.5% PPRT

Tax classification

Illinois taxable net income ($)

4.95% PTE Tax Election — partnership / S-Corp

IL individual income tax (4.95%)

$7,425

Personal Property Replacement Tax

Combined Illinois estimate

$7,425

Illustrative federal SE tax (15.3%)

$22,950

35 ILCS 5/201(p). Simplified estimates, not tax advice: federal SE/FICA caps, deductions, apportionment, shareholder basis and SALT eligibility are not modeled. PTE savings assume the full elected payment yields an additional federal deduction; actual benefit may be lower or zero. Salary must be reasonable.

Illinois Anniversary-Month Annual Report & Penalties

Entity and annual report

Formation date

As-of date

First anniversary report already filed

Active registered series (0 for standard LLC)

Report due (previous month end)

September 30, 2026

60-day window opens

August 2, 2026

On-time state + $99 service

$174

LLC late penalty

IL Form LLC-50.1 (LLC Annual Report) · Due before October 1, 2026. $100 late-penalty threshold: November 29, 2026. 180-day administrative-dissolution warning: March 29, 2027.

28 days overdue.

Past-due report count for reinstatement estimate

Form LLC-35.40: $200 reinstatement + $75 × 1 back report(s) + $0 modeled penalty + $299 service = $574. Additional assessed penalties may apply; this estimate does not establish actual dissolution status.

File IL Annual Report — $174

805 ILCS 180/50-1, 50-15, 35-25; 805 ILCS 5/14.05, 12.35; 805 ILCS 105/114.05. Reports follow the anniversary month, not a statewide calendar deadline.