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.
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 filings | State fee | Notes |
|---|---|---|
| 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 | $385 | Application 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:
