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Connecticut Corporation cost

Forming a corporation in Connecticut costs $500 in state fees in year one, then about $400 a year to stay in good standing.

Connecticut Corporation
Partly unverified
State fees only · retrieved 2026-10-20
Certificate of Incorporation (Stock Corporation)source$250
Annual Reportsource$150 / yr
Corporation Business Tax (minimum)source$250 / yr
Year one$500
Every year after (average)$400
5-year total$2,100
Next deadline: Annually, filed online; due by the end of the incorporation anniversary month (due rule not confirmed on an official page)
Formation fee$250
Report fee$150
How oftenAnnual
State minimum tax$250

Forming a Connecticut Corporation

You file Certificate of Incorporation (Stock Corporation) with the Connecticut Secretary of the State, Business Services Division. The state fee is $250. See the official fee.

File it yourself with the state →

Every year after

  • Annual Report: $150, filed every year. Due: Annually, filed online; due by the end of the incorporation anniversary month (due rule not confirmed on an official page).
  • First one: Organization and First Report ($150) is filed after incorporation; annual reports follow in later years (exact timing not confirmed).
  • If you're late: No late fee listed; the Secretary may administratively dissolve a corporation that fails to file. Reinstatement $300 (includes annual report).
  • Official report page

State taxes that apply even to a small Corporation

  • Corporation Business Tax (minimum): $250 — $250 minimum Corporation Business Tax per year for C corporations, regardless of income. LLCs taxed as partnerships/disregarded entities do not pay it. The separate $250 biennial Business Entity Tax was eliminated for income years beginning on or after January 1, 2020. source

Worth knowing

  • Forming an LLC costs $120; a stock corporation costs $250 (includes minimum franchise tax for up to 20,000 shares); a nonstock corporation $50.
  • LLC annual reports cost $80 and are due January 1 to March 31 each year.
  • Stock corporations pay a $150 annual report fee and at least $250 a year in Corporation Business Tax.
  • All annual reports must be filed online.

Registered agent

Connecticut requires a registered agent. Must appoint a statutory agent with a Connecticut address; appointment is included in the Certificate of Organization/Incorporation fee. You can serve as your own agent if you have a qualifying address; paid services usually charge a yearly fee.

Other filingsState feeNotes
Name reservation$60
DBA / assumed name (local)—Trade name certificate is filed with the town clerk in each town where the business operates; fee set locally
Expedited processing$50$50 per transaction; expedited service available online only
Foreign Corporation registration$385Application for Certificate of Authority (includes $285 license fee)

Fees last checked 2026-10-20 against Connecticut Secretary of the State, Business Services Division and the state revenue department. States change fees — confirm on the linked page before you file.

Thinking about forming somewhere else?

If you operate in Connecticut, an out-of-state Corporation also has to register here as a foreign entity. See both costs side by side:

Connecticut vs. DelawareConnecticut vs. WyomingConnecticut vs. Nevada

Your numbers

Year one$500
Each year after$400
5 years$2,100
Customize in the calculatorFile with the state