Starting an LLC in Connecticut follows the same eight-step arc as every state: pick a name the state will accept, appoint a registered agent, file the Certificate of Organization with the Connecticut Secretary of State and its $120 fee, then build the compliance layer that keeps the entity alive. This guide covers the Connecticut-specific numbers and hands you the state's full resource set; the deeper national treatment of each step lives in the complete formation guide.
The Five Steps in Connecticut
Two universal warnings apply with full force in Connecticut. The state's name approval is not trademark clearance: run the USPTO check before you commit (see trademarking your name). And the EIN is free at the IRS, instantly, so never buy it from a lookalike site; the walkthrough is in the EIN guide.
What It Costs in Connecticut
The Certificate of Organization costs $120, paid once to the Connecticut Secretary of State. The recurring obligation is the $80 Annual Report, due every March 31 for LLCs. A commercial registered agent adds $100 to $300 per year if you choose one over serving yourself; File.Business charges $149 with the first year included in a Connecticut formation. Where Connecticut sits against all 50 states, and whether forming elsewhere could ever make sense (for most Connecticut businesses: no), is covered in the cost breakdown and the best-state analysis.
Form your LLC
If you would rather not do this yourself, we prepare the articles, check name availability with the state, and file it for you. Or keep reading and file it on your own. This guide covers everything you need either way.
After Approval: the Connecticut Checklist
The stamped formation document plus the EIN letter opens the business bank account, and running every business dollar through that account is what keeps the liability shield real (the solo-owner version of this warning is in the single-member guide). Adopt the operating agreement the same week: the Connecticut operating agreement guide covers the state specifics. Then calendar the recurring obligations: start with the Connecticut annual report guide, or put the entity on compliance monitoring and let the calendar watch itself.
The Connecticut resource set: Formation Service · Cost Breakdown · Business Search · Operating Agreement Guide · Annual Report Guide · Dba Guide · Foreign Qualification Guide · Registered Agent Guide.
Connecticut vs the Famous Formation States
Founders operating in Connecticut regularly ask whether Wyoming or Delaware would be cheaper. The arithmetic answers it: an out-of-state LLC that operates in Connecticut must still register in Connecticut as a foreign LLC, pay Connecticut's fees, and maintain a second registered agent, so the famous state becomes a surcharge, not a substitute. The five-year comparison for a business that lives here:
| Structure | Formation cost | Recurring | Five-year state cost |
|---|---|---|---|
| Connecticut (home state) | $120 | $80/yr | $520 |
| Wyoming + Connecticut foreign registration | $100 + Connecticut filing | Two states, two agents | $400 + all Connecticut costs anyway |
| Delaware + Connecticut foreign registration | $110 + Connecticut filing | $300/yr DE tax + Connecticut costs | $1610 + all Connecticut costs anyway |
The genuine exceptions (venture-backed startups, non-US founders, pure holding companies) are mapped honestly in the best-state analysis. For a business operating in Connecticut, forming in Connecticut wins on cost, simplicity, and risk surface.
Three Connecticut Formations in Practice
Example 1: A solo IT consultant in Stamford
He checks the name in the state business search, files the Certificate of Organization through CONCORD for $120, and pays the $50 expedite because a client contract starts in ten days, bringing the wait down from 5 to 10 business days to 2 to 3. He trades under a shortened brand name, which in Connecticut means a Trade Name Certificate filed with the town clerk rather than the state, somewhere between $10 and $50 depending on the town. March 31 goes in the calendar for the $80 Annual Report.
Outcome: Contract signed on time in the entity name, with the town-level trade name filed before the first invoice went out.
Example 2: A three-owner billing company in New Haven
Three owners fund the business 70, 20 and 10 and appoint one of them as managing member. Connecticut is unusual among its neighbours in that the Connecticut Uniform Limited Liability Company Act (Conn. Gen. Stat. § 34-243) already ties both voting and distributions to capital interest rather than headcount, so the majority funder controls by default. The two minority owners negotiate for what the statute does not give them: supermajority consent on borrowing, admitting members and selling assets. When the company rebrands in year three the Certificate of Amendment costs $120, the same as forming did, which is why the original filing was worth getting right.
Outcome: The agreement protects the minority owners the statute does not. See the Connecticut operating agreement guide.
Example 3: A New York firm opening a Hartford office
An architecture practice organised in New York signs a lease and moves four staff to Hartford. It registers with a Foreign Registration Statement carrying a $150 base fee and attaches a good-standing certificate from New York dated within the previous 90 days. Standard processing is 5 to 10 business days with a $50 expedite available. Connecticut companies expanding the other way run into the naming quirk: when the receiving state asks for a certificate of good standing, Connecticut issues a Certificate of Legal Existence for $50, valid 60 days, and it is the same document under a different title.
Outcome: Two registrations and two calendars, with the March 31 Connecticut deadline added to the New York cycle. Detail in the Connecticut foreign qualification guide.
Missing March 31: Penalties, Dissolution and Reinstatement
Connecticut puts every LLC on the same clock. The Annual Report costs $80 and is due March 31, not on your formation anniversary, so the deadline arrives at the same time as personal tax preparation and the fiscal year end work that many small businesses are already buried in. Missing it costs $50 plus interest, and the entity stops being current the moment the date passes.
What that costs in practice depends on what you were about to do. The Certificate of Legal Existence, priced at $50 with a 60 day validity, is Connecticut's proof of standing under a name most people do not search for, and the Secretary of State will not issue it for an entity that is behind. Lenders, landlords, professional boards and other states all want that document, and the request usually arrives with a deadline attached.
Unattended, the file moves toward administrative dissolution, which the state data set places at around 36 months. Dissolution ends the company authority to do business in Connecticut and ends the liability separation with it. Anything signed afterwards was signed by the individuals behind the name, and no later filing changes what the register showed on the day.
Reinstatement runs through an Application for Reinstatement inside a 36 month window, and Connecticut requires tax clearance first. That is the step that turns a quick repair into a slow one, because the Department of Revenue Services has to be satisfied before the Secretary of State restores the record. Add up a three year lapse: $240 in missed Annual Reports, $150 in late penalties, interest, the reinstatement filing, and a tax clearance process running on its own schedule while the business waits.
One recurring date prevents all of it. March 31, $80, ten minutes. The Connecticut annual report guide covers the filing, and compliance monitoring holds the date so it does not compete with tax season for attention.
Five Connecticut Mistakes Worth Avoiding
Mistake 1: Hunting for a certificate of good standing
A lender or an out-of-state agency asks for a certificate of good standing, and the Connecticut founder searches the state site for a document that does not exist under that name.
Why it happens. Connecticut calls its version a Certificate of Legal Existence. The document is functionally identical, the label is not. What it costs. Days lost at exactly the point a transaction is waiting, and the certificate itself is $50 with only 60 days of validity, so a late start can mean ordering twice. Prevention. Ask for the Certificate of Legal Existence by name, and order it once the receiving party has confirmed the deadline.
Mistake 2: Expecting an anniversary-month reminder
Owners who formed elsewhere first assume the recurring filing tracks their formation date. Connecticut uses one fixed date for every LLC.
Why it happens. March 31 sits in the busiest compliance month of the year, next to personal returns. What it costs. $50 plus interest on an $80 filing, and a public record that stops saying current. Prevention. Calendar March 31 as a recurring entry at formation, ideally two weeks early.
Mistake 3: Treating the initial filing as a draft
Names, addresses and management structure get entered quickly on the theory that they can be corrected later for a small fee.
Why it happens. In many states an amendment costs $25 or less. What it costs. A Connecticut Certificate of Amendment is $120, the same as the original Certificate of Organization, and a change of agent for service is another $50. Prevention. Settle the name, the management structure and the agent before filing, because in Connecticut a correction is a second formation fee.
Mistake 4: Filing the trade name in the wrong place
Businesses trading under a name different from the registered one look for a state DBA register. Connecticut does not run one for this purpose.
Why it happens. Most states file assumed names centrally. What it costs. Connecticut handles the Trade Name Certificate at town level, roughly $10 to $50 depending on the town, and invoicing or banking under an unregistered name causes problems with both. Prevention. File with the town clerk where the business is located. See the Connecticut trade name guide.
Mistake 5: Assuming reinstatement is a single form
An owner who lets the entity lapse expects to fix it in an afternoon once the business needs it again.
Why it happens. Reinstatement sounds like a renewal. What it costs. Connecticut requires tax clearance before the Secretary of State restores the record, so every missed $80 Annual Report and $50 penalty is settled first, inside a 36 month window that closes for good. Prevention. Cure the delinquency in the same year it happens, or file the $50 Certificate of Dissolution if the business has ended. The dissolution guide covers the order.
$120 and a clean checklist
A Connecticut LLC is one filing, one agent, and a short follow-through list: agreement, EIN, licenses, bank account, and the recurring calendar. Do the follow-through and the entity does its job.
Frequently asked questions
How much does it cost to start an LLC in Connecticut?
The Connecticut state filing fee for LLC formation is $120, paid once when the formation document is filed. Recurring state cost after that: $80 per year in state fees. Add $100 to $300 per year if you use a commercial registered agent. Full numbers: the Connecticut cost breakdown.
Do I need a registered agent in Connecticut?
Yes. Every Connecticut LLC must continuously maintain a registered agent with a physical street address in the state, available during business hours to accept legal documents. You can serve yourself (your address becomes public record) or use a commercial service; the trade-offs are covered in our registered agent analysis.
Does Connecticut require an operating agreement?
State law does not require one, but every LLC should adopt one: banks ask for it, it fixes ownership and exit rules, and it is your primary evidence of entity separateness. See the Connecticut operating agreement guide.
How long does it take to get an LLC in Connecticut?
Online filings in most states are approved within one to five business days, and Connecticut publishes current processing times on its filing portal; check them before filing if you are on a deadline. The full stage-by-stage timeline, including the instant EIN and bank onboarding, is in our timeline guide.
Is it cheaper to form in Wyoming instead of Connecticut?
Not if the business operates in Connecticut: an out-of-state LLC must register here as a foreign LLC anyway, so Wyoming's $100 fee stacks on top of every Connecticut cost instead of replacing it, plus a second registered agent forever. The five-year math is in the comparison table above and the best-state analysis.
What happens if I ignore Connecticut's recurring requirements?
Connecticut's recurring obligations escalate the same way every state's do: late penalties first, loss of good standing next (which blocks loans and certificates), then administrative dissolution, which ends the liability shield. Reinstatement means back filings plus penalties. Compliance monitoring exists to make this failure mode impossible.
What taxes will my Connecticut LLC pay?
By default the LLC itself pays no federal income tax: profits pass through to your personal return with 15.3% self-employment tax on active income, plus state obligations. The full picture, including quarterly estimates and the S-corp election, is in the LLC tax guide and franchise tax by state.
Form your Connecticut LLC with the state fee at cost.
Name check against the Connecticut record, formation prepared and filed, operating agreement, EIN, and a year of registered agent service. The $120 state fee passes through with no markup.
Doing this in Connecticut specifically: Connecticut LLC formation and what a Connecticut LLC costs cover the detail for this state, including the current fee and the exact form the agency expects.
This guide is written from the official sources below. Fees, forms, and deadlines change; confirm the current requirement with the agency before you file.
Disclosure. File.Business is a private filing service, not a government agency and not a law firm. We prepare and submit filings at your direction, and nothing on this page is legal or tax advice. Filing fees, deadlines, and statutory references are current as of the last-updated date shown above and can change. Confirm current requirements with the relevant state agency before you file.
