Connecticut Secretary of State filings, deadlines, and how to do them right.
Annual reports, business search, registered agent changes, reinstatement, dissolution, tax registration. Every Connecticut filing explained, plus the business environment, regulatory bodies, and a year-round compliance calendar. Verified against the Connecticut Secretary of the State, Business Services Division as of June 2026.
Why founders choose Connecticut (and what to know first)
Strong insurance and financial services ecosystem. No local sales tax (state level only). Highly educated workforce. Proximity to New York and Boston markets.
Tax obligations at a glance
Tax obligations depend on entity type, where you operate, and where revenue is sourced. Consult a licensed CPA for entity-specific advice. File.Business connects you with vetted CPAs in Connecticut on request.
Other Connecticut agencies your business will touch
The Secretary of State handles formation and corporate filings. These agencies handle the rest of your Connecticut compliance.
State income tax, sales tax, corporate income tax
Unemployment insurance, wage and hour
Insurance licensing
Workers comp requirements
Consumer protection, alcohol licensing
Environmental permits, energy regulations
Year-round filings every Connecticut business should know
Recurring federal and state deadlines that affect Connecticut businesses. Our Compliance Calendar tracks these and 200+ others against your entity.
How to form an LLC in Connecticut: step by step
Each step explained with what Connecticut requires. File.Business handles all of this for $0 service fee plus the $120 state fee.
Search the state business name database to confirm the name is distinguishable. Must include LLC, L.L.C., or Limited Liability Company.
State street address required (no P.O. Box). The agent must accept the appointment and be available during business hours.
Submit to the Secretary of State with the state filing fee. Online filing is the fastest channel.
Not filed with the state but legally important. Defines members, contributions, distributions, and manager rules.
IRS Form SS-4. Online if a member has an SSN; mail/fax if all members are non-US.
Most banks require: Articles, EIN letter, operating agreement, and beneficial-owner ID.
Department of Revenue for sales tax, withholding accounts if hiring employees.
Ready to file your Connecticut paperwork the easy way?
Five minutes per filing. State fee passed through at cost. Audit trail and deadline tracking included.
Disclosure. File.Business is a private business filing and compliance service. We are not a government agency and are not affiliated with the Connecticut Secretary of the State, Business Services Division or any Secretary of State office. You may file directly with the Connecticut Secretary of the State, Business Services Division. Information on this page is for general guidance only and is not legal, tax, or accounting advice. Filing fees and deadlines verified against the Connecticut Secretary of the State, Business Services Division as of June 2026 and may change. For entity-specific guidance, consult a licensed Connecticut attorney or CPA.
Every Connecticut Secretary of State topic, in one place.
24 keyword-focused guides covering every filing, form, and compliance question for Connecticut businesses.