Illinois business filing
Illinois Assumed Name / DBA Registration
Form LLC-1.20 / Form BCA 4.15 · 805 ILCS 180/1-20 & 805 ILCS 5/4.15 · $150 state + $149 service = $299 total. $30–$150 state fee on five-year cycle; $299 maximum, $269 in 2026 ($120 state + $149 service). No newspaper publication for statewide LLC/corp assumed names; county DBAs under 805 ILCS 405/1 require three-week publication.
Last content review: October 28, 2026
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- Illinois 805 ILCS 180 & 805 ILCS 5 statutory references
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What to know before you file
Form LLC-1.20 / Form BCA 4.15
Form LLC-1.20 / Form BCA 4.15 · 805 ILCS 180/1-20 & 805 ILCS 5/4.15 · $150 state + $149 service = $299 total. $30–$150 state fee on five-year cycle; $299 maximum, $269 in 2026 ($120 state + $149 service). No newspaper publication for statewide LLC/corp assumed names; county DBAs under 805 ILCS 405/1 require three-week publication.
Official source: Illinois Secretary of State — Department of Business ServicesState and local compliance
LLC formation requires no newspaper publication. Statewide LLC/corporation assumed names use Form LLC-1.20 / BCA 4.15 with zero newspaper publication. Sole proprietors and general partnerships register with the County Clerk under 805 ILCS 405/1 and publish once each week for three consecutive weeks; confirm filing, publication and proof deadlines with the clerk.
Official source: Illinois General Assembly — 805 ILCSFrequently asked questions
Form LLC-1.20 / Form BCA 4.15 · 805 ILCS 180/1-20 & 805 ILCS 5/4.15 · $150 state + $149 service = $299 total. $30–$150 state fee on five-year cycle; $299 maximum, $269 in 2026 ($120 state + $149 service). No newspaper publication for statewide LLC/corp assumed names; county DBAs under 805 ILCS 405/1 require three-week publication.
Official source: Illinois Secretary of State — Department of Business ServicesNo. Check municipal licenses, MyTax Illinois registration and professional approvals before operating.
Official source: Illinois state agencyYour next chapter. In Illinois.
Corp USA is not a law firm and does not provide legal advice.