How to Form an LLC
in Connecticut

Connecticut charges a $120 filing fee for the Certificate of Organization, filed online through the Connecticut Business Services Division at business.ct.gov. Standard online processing is 3–5 business days; $50 24-hour paid expedite is available. Eleet AI charges $269 all-inclusive — covers the $120 state fee, Certificate of Organization preparation, filing through business.ct.gov, and first-year Connecticut registered agent service. DIY realistic totals land $200–$525 in year one after adding commercial registered agent service ($75–$299/yr) + optional operating-agreement template. Ongoing: $80/yr Annual Report due between Jan 1 and March 31 every year under C.G.S. § 34-247. Critical update most competitors miss — the Connecticut Business Entity Tax (BET) was PERMANENTLY REPEALED effective Jan 1, 2020 under Public Act 19-117 (Section 319), eliminating a $250 biennial tax that had existed since 1993. Most national formation services still reference this obsolete $250 BET in their CT cost breakdowns. As of 2020, CT LLCs pay $0 BET. 10-year SOS compliance cost for a CT LLC: $120 formation + $800 annual reports = $920 total — moderate by US standards, much cheaper than CA ($8,000 lifetime 10yr), MA ($5,000), DE ($3,000), but higher than OH $0, MO $0, OK $25/yr.

Yes. Public Act 19-117 Section 319, enacted during the 2019 CT General Assembly session and signed by Governor Lamont, PERMANENTLY REPEALED the Connecticut Business Entity Tax (BET) effective Jan 1, 2020. The BET was a $250 biennial tax imposed on LLCs, LLPs, LPs, and S-Corps since 1993 — effectively a flat $125/yr entity-level fee that most competitor guides STILL reference. As of tax year 2020 and forward, CT LLCs pay $0 BET. The last BET tax return (Form OP-424) was due in 2019 for tax year 2019. Connecticut joins the majority of US states in NOT imposing a flat entity-level tax on pass-through LLCs. Reasons for repeal: CT DRS estimated the BET cost more to administer than it collected, and it was a point of friction for small business formation retention. Correcting this 5-year-old outdated claim is a key honesty differentiator — if a formation service or tax advisor still tells you CT charges a $250 biennial BET in 2026, they are working from pre-2020 information.

Connecticut Pass-Through Entity Tax (PET) was enacted via Public Act 18-49 (May 2018) codified at C.G.S. § 12-699, imposing a 6.99% entity-level income tax on partnership-taxed LLCs + LLPs + S-Corps as a FEDERAL SALT-CAP WORKAROUND for the TCJA 2017 $10K state-and-local tax deduction cap. CT was the FIRST US state to mandate entity-level PTE taxation — at the time, state-level taxes paid by pass-through entities were still deductible on the federal return, bypassing the individual-level SALT cap. Members received a CT income tax credit equal to the entity-paid PET. Mandatory 2018–2023. Under PUBLIC ACT 23-204 (June 2023), PET became ELECTIVE starting tax year 2024 — LLCs and S-Corps now choose annually whether to pay at the entity level (for federal SALT deduction) or pass through to members. Math: for a CT partnership LLC with $1M pass-through income and two members at CT 6.99% top + federal 37% bracket, electing PET saves ~$74K/yr in federal taxes (full federal deductibility of the $69,900 PET payment vs SALT-capped $10K deduction at member level). Election via Form CT-1065/CT-1120SI. Eleet AI partners with CT CPAs who model the PET election each year for our CT LLC customers — the break-even varies by member-level CT tax exposure.

Yes. CT LLCs must file an annual report between Jan 1 and March 31 EVERY YEAR under C.G.S. § 34-247, starting the year after formation. $80 fee filed online at business.ct.gov. Harmonized to fixed March 31 deadline in 2020 — before 2020 it was rolling anniversary-month, which caused frequent missed deadlines. The annual report confirms LLC name, registered agent + office, principal place of business, management structure, and members/managers. Late filings: $50 late fee after March 31. Administrative dissolution: CT dissolves LLCs that fail to file an annual report for 1 full year + 60-day grace — one of the stricter US dissolution rules (compare Oklahoma which allows 3 consecutive years missed before cancellation, Wyoming which allows 60 days past due). Reinstatement possible within 5 years of dissolution by filing all past-due annual reports + fees + $80 reinstatement fee. Eleet AI's CT registered agent service reminds customers of the March 31 deadline 60/30/7 days ahead so nothing slips.

Yes — every Connecticut LLC must continuously maintain a registered agent with a physical Connecticut street address under C.G.S. § 34-243p. No PO boxes, no commercial mail-receiving addresses without proper designation, no out-of-state addresses. The agent receives service of process, Connecticut Secretary of State correspondence, DRS Department of Revenue Services notices, and legal filings during normal business hours. Eligibility: (a) a Connecticut-resident individual age 18+ with a CT street address, OR (b) a business entity authorized to transact business in Connecticut with a physical CT street address. The registered agent name and address appear on public filings (Certificate of Organization, annual reports, amendments) and are searchable via the CT Business Records Search at business.ct.gov. You can serve as your own registered agent if you're a CT resident available during business hours, but your home address becomes public record — indexed by process servers, collection agencies, data brokers, and solicitation mailers. Most CT founders use a commercial registered agent for privacy and reliability. Eleet AI's Connecticut registered agent service is included free in year one with formation, then $100/yr after — and we scan + digitize every piece of mail within 24 hours.

Standard online filings through business.ct.gov typically process in 3–5 business days — middle-of-the-pack for US states (faster than NY 6-8 weeks with publication, CA 5-10 days, WA 5-7 days; slower than VA 1-3 days, MN same-day, IN same-day, GA 1-2 days). Connecticut offers a $50 24-hour paid expedite tier. Paper filings mailed to the CT Business Services Division in Hartford are accepted at the same $120 fee but take 10-15 business days from mail receipt. Eleet AI files online through business.ct.gov by default. After Certificate of Organization approval, budget another 1–2 weeks for federal EIN issuance (instant online through IRS.gov during IRS business hours), 1–2 weeks for Connecticut DRS myconneCT registration if hiring or selling taxable goods/services, 1–2 weeks for Connecticut Department of Labor unemployment insurance registration if hiring, and 2–4 weeks for local city business licenses if required (Hartford, New Haven, Bridgeport, Stamford, Waterbury, Norwalk).

Connecticut has progressive personal income tax, pass-through entity tax election, and a flat 6.35% state sales tax (no local additions). (1) State personal income tax — graduated 3% / 5% / 5.5% / 6% / 6.5% / 6.9% / 6.99% (seven brackets under C.G.S. § 12-700, 2025 brackets). Top 6.99% applies to single filers above $500K / joint above $1M. $250K single-member pass-through income ≈ $14K CT tax. Pass-through LLC income flows through to CT-resident members via Schedule K-1 unless PET is elected. (2) Pass-Through Entity Tax (PET) under C.G.S. § 12-699 at 6.99% — ELECTIVE starting tax year 2024 under Public Act 23-204. Entity-level tax creates federal SALT-cap workaround; members receive CT income tax credit for entity-paid PET. Annual election via Form CT-1065/CT-1120SI. (3) NO Business Entity Tax (BET) — REPEALED Jan 1, 2020 under Public Act 19-117. (4) Corporation business tax — 7.5% flat plus 10% surtax (effective 8.25%) for corporations with >$100K CT-sourced income under C.G.S. § 12-214. Applies ONLY to LLCs that elect C-Corp federal tax treatment. Capital base tax previously separate, now rolled into single income-base calculation post-2023. (5) Sales and use tax — 6.35% FLAT statewide under C.G.S. § 12-408, NO local city/county additions (one of the simplest US sales tax systems — NY combined 8.88% NYC, CA combined 10.25% SF, WA combined 10.25% Seattle, IL combined 10.25% Chicago, LA combined 9.45% New Orleans). Luxury rate 7.75% on single-item motor vehicles >$50K / clothing/footwear >$1K / jewelry >$5K / other >$5K under C.G.S. § 12-408b. Meals + prepared food rate 7.35% under C.G.S. § 12-408a. Register for CT sales tax at portal.ct.gov TSC myconneCT. (6) Unemployment Insurance — required via CT Department of Labor at ctdol.state.ct.us if hiring. (7) Workers' Compensation — required under C.G.S. § 31-275 et seq for any employer with 1+ employees (like most US states). Procure through private carriers or Connecticut Workers' Compensation Commission. (8) Withholding tax — required for LLCs with CT employees; quarterly/monthly payments via myconneCT. (9) Real and personal property tax — local municipal assessor, rates vary by municipality. CT has relatively HIGH property tax by US standards — median effective rate ~1.96% (vs. US average ~1.07%). (10) Controlling interest transfer tax — 1.11% on transfers of controlling interests in CT real property under C.G.S. § 12-638a.

No. Connecticut does NOT statutorily permit series LLCs. The Connecticut Uniform LLC Act (CULLCA, C.G.S. Title 34 Chapter 613a, enacted 2016 effective July 1, 2017 via Public Act 16-97) is based on the 2013 Revised Uniform LLC Act (RULLCA) but omits the series-LLC optional provisions. A CT LLC cannot create protected series with intra-series liability segregation. Founders needing series-LLC protection for multi-property real estate portfolios or multi-asset holding structures must form in a series-LLC state — Delaware (Del. Code Ann. tit. 6 § 18-215, the original series-LLC state), Illinois (805 ILCS 180/37-40), Texas (Tex. Bus. Orgs. Code § 101.601), Wyoming, Iowa, Nevada, Oklahoma, Tennessee, Utah, Alabama, Virginia, Kentucky, Indiana, Missouri, North Dakota, Wisconsin (post-2023), Puerto Rico — and foreign-qualify into Connecticut if the series LLC has CT operations. Common pattern: form series LLC in DE at $110 + $300/yr franchise, foreign-qualify into CT at $120 + $80/yr annual report. Aggregate first-year cost ~$410 + $380/yr ongoing for the combined DE series + CT foreign qualification vs ~$269 for a native CT non-series LLC. Series LLC makes sense for portfolios of 5+ segregated assets.

Because Connecticut hosts FOUR of the most concentrated industry clusters in the United States: (1) HARTFORD — INSURANCE CAPITAL OF THE WORLD. ~100 insurance company HQs in the Hartford MSA generating ~$80B annual premiums. Aetna (~$90B revenue, CVS subsidiary since 2018 but Hartford HQ retained, ~11K CT employees), Travelers (F500 #98, ~$36B revenue, ~8K CT employees), The Hartford Financial Services Group (F500 #135, ~$22B revenue, ~6K CT employees), Cigna (F500 #15, ~$195B revenue, ~11K CT employees at Bloomfield HQ), Lincoln Financial Group (F500 #178 Radnor PA HQ but ~$2K CT employees), MassMutual Enfield CT, The Phoenix Companies Hartford, Voya Financial Windsor, Sun Life Financial Windsor, Prudential Hartford, Allianz Life Minneapolis + Hartford. Supplier LLC opportunities: actuarial consulting, claims adjusting, TPA third-party administration, insurance software + data analytics, insurtech startups (CT Insurance Innovation Hub supports), captive insurance formation (CT is a growing captive domicile), reinsurance brokerage, ILS insurance-linked-securities structuring, insurance regulatory compliance, CT Department of Insurance relationship management. (2) STAMFORD + GREENWICH + WESTPORT — HEDGE FUND CAPITAL OF THE WORLD. Combined Fairfield County hedge fund + PE + family office AUM exceeds $800B. Bridgewater Associates (Westport, ~$125B AUM — the LARGEST hedge fund in the world, founded 1975 by Ray Dalio), AQR Capital Management (Greenwich, ~$95B AUM, Cliff Asness quantitative strategies), Point72 Asset Management (Stamford, ~$35B AUM, Steve Cohen — formerly SAC Capital), Lone Pine Capital (Greenwich, Stephen Mandel Jr, ~$20B AUM), Viking Global Investors (Greenwich, Ole Andreas Halvorsen, ~$30B AUM), Tudor Investment Corporation (Stamford, Paul Tudor Jones, ~$13B AUM), D. E. Shaw Group Greenwich office, Tiger Global Greenwich office, Greenlight Capital Greenwich (David Einhorn), Third Point Greenwich (Dan Loeb). Plus Charter Communications/Spectrum (F500 #65 Stamford), Gartner (F500 #459 Stamford), Synchrony Financial (F500 #176 Stamford), WWE (Stamford), Philip Morris International (F500 #100 Stamford — relocated HQ from NYC 2021), NBC Sports Stamford, Diageo North America Norwalk, Xerox (F500 #311 Norwalk), Crane NXT Stamford. Supplier LLC opportunities: fund administration, prime brokerage servicing, quant-research consulting, compliance + AML/KYC services, alternative-investment tax + audit (Big Four CT offices), fund legal services (CT + NY Bar cross-admitted firms), fund-administration software, executive-search/headhunting. (3) DEFENSE — GROTON / STRATFORD / EAST HARTFORD DEFENSE SUPPLY CHAIN. Electric Boat Groton (General Dynamics subsidiary, ONLY US shipyard building nuclear submarines — Virginia + Columbia classes, ~24K employees CT+RI, AUKUS $3B+ acceleration 2023-2024), Sikorsky Aircraft Stratford (Lockheed Martin subsidiary, UH-60 Black Hawk + CH-53K King Stallion + VH-92A Presidential + S-92 + S-76, ~8K CT employees), Pratt & Whitney East Hartford (RTX subsidiary, F135 sole-source F-35 engine + F100 F-15/F-16 + F119 F-22 + PW1000G Geared Turbofan commercial + PT6 turboprop + PW800 business jet, ~13K CT employees). Supplier LLC opportunities: precision machining + nickel superalloy + titanium, NDT non-destructive test, welding + composites, avionics + flight-control software, sonar + combat systems integration, DoD software engineering (SBIR/STTR/OTA, FAR Part 12/15 contracting), cybersecurity compliance (NIST 800-171, CMMC 2.0 Level 1/2), base operations services at Submarine Base New London (SUBASE NLON). (4) NEW HAVEN — YALE BIOTECH SPINOUT ANCHOR. Yale University (~$42B endowment, among top 3 US universities), Yale School of Medicine + Yale-New Haven Hospital. Spinouts: Alexion Pharmaceuticals (AstraZeneca subsidiary, founded 1992 at Yale, ~$8B revenue, Soliris + Ultomiris + Strensiq rare-disease drugs), Arvinas (Yale protein-degrader PROTAC technology, NASDAQ ARVN), Biohaven Pharmaceutical (Yale migraine/neurology spinout, $11.6B Pfizer acquisition 2022), Achillion, Melinta, Loxo Oncology, Kolltan, CytoSorbents. Supplier LLC ecosystem: clinical research organizations (CROs), laboratory services, medical device contract manufacturing, biotech IP law firms, pharmaceutical cold-chain logistics, FDA regulatory consulting, biotech executive search.

Yes. Connecticut welcomes non-resident LLC formations, and the Connecticut Business Services Division processes filings from all 50 states and international founders. The only CT-resident requirement is the registered agent — commercial agents (like Eleet AI) satisfy this requirement. However, consider the foreign-qualification trap: (1) if you actually operate your business mainly in another state (employees there, storefront there, services delivered from there), that state will likely require you to register your Connecticut LLC as a "foreign LLC" in the operating state, adding another filing fee, registered agent, and annual report. (2) For pure anonymous holding LLCs with no actual Connecticut operations, WY ($100 + $60/yr anonymous under W.S. § 17-29-503) or NM ($50 + $0 annual + anonymous) are significantly cheaper AND more private — CT requires member/manager disclosure on annual reports. (3) For zero-personal-income-tax states, TX + FL + NV + TN + WA + WY + SD beat CT for out-of-state residents. Connecticut's strongest non-resident use cases: (1) NYC commuters — Fairfield County (Greenwich, Stamford, Norwalk, Westport, New Canaan, Darien, Ridgefield) offers Metro-North New Haven Line commute to Grand Central in 30-60 minutes, but CT residency triggers CT income tax on all CT-source income plus NY convenience-rule exposure for remote NY-employer days; (2) HARTFORD INSURANCE — Aetna / Travelers / The Hartford / Cigna / Lincoln Financial ecosystem supplier LLCs; (3) STAMFORD + GREENWICH HEDGE FUNDS — Bridgewater / AQR / Point72 / Lone Pine / Viking / Tudor supplier LLCs (fund admin, compliance, quant research); (4) GROTON SUBMARINES — Electric Boat Tier-1/2/3 supplier LLCs (nuclear sub supply chain, ~$3B AUKUS acceleration); (5) STRATFORD HELICOPTERS — Sikorsky Aircraft UH-60 / CH-53K supplier LLCs; (6) EAST HARTFORD AEROSPACE PROPULSION — Pratt & Whitney F135 / PW1000G supplier LLCs; (7) YALE BIOTECH — spinout + CRO + med device supplier LLCs; (8) CT CAPTIVE INSURANCE — captive insurance domicile (CT is growing captive market under CT Insurance Department); (9) founders genuinely relocating to CT for family/schools — New England prep school + elite private school density + public schools in Fairfield + Hartford suburbs. If you just want an anonymous pure holding LLC with no Connecticut operations, Wyoming or New Mexico remain the default choice.

It depends on the city and business activity. Connecticut has no state-level general business license (unlike WA's UBI). Most CT cities and some towns require local business registration or specific occupational licenses. Key metros: (1) Hartford — Hartford Department of Development Services business registration, occupational licensing for restaurants + retail + trades. (2) New Haven — New Haven Economic Development Office business registration, tax registration. (3) Bridgeport — Bridgeport Licensing Department. (4) Stamford — Stamford City Clerk business registration + Zoning + Health Department depending on activity. (5) Norwalk — Norwalk town clerk. (6) Waterbury — Waterbury business registration. (7) Danbury — Danbury business registration. (8) New Britain — New Britain business registration. (9) Greenwich — Greenwich town clerk business registration. Industry-specific state licensing — CT Department of Consumer Protection (DCP) oversees most professional and occupational licensing under C.G.S. Chapters 390-400+: contractors (home improvement contractor, new home construction contractor), real estate salespersons and brokers, alcohol liquor permits, cosmetology, pharmacy, optometry, accountancy, architecture, engineering, physical therapy, dental hygienists, veterinarians, plumbers, electricians (state-licensed), elevator mechanics; CT Department of Banking for banks, money transmitters, mortgage brokers, consumer lenders; CT Department of Insurance for insurance producers, agencies, captives, reinsurers; CT Department of Transportation for commercial carriers; CT Department of Public Health for physicians, nurses, PAs, health facilities; CT Bar Examining Committee + CT Supreme Court for attorneys; CT Gaming Commission for casino/gaming (post-PA 21-23 online sports betting + igaming). For cannabis — Connecticut legalized adult-use cannabis under Public Act 21-1 (June 2021), regulated by the CT Department of Consumer Protection Cannabis Division at portal.ct.gov/cannabis — separate producer, retailer, micro-cultivator, hybrid-retailer, transporter, packager, and delivery licenses; retail sales began January 2023. For captive insurance — CT Insurance Department at portal.ct.gov/cid is the captive domicile regulator under C.G.S. § 38a-91aa et seq.

After Connecticut Business Services Division approves your Certificate of Organization: (1) Apply for a federal EIN at IRS.gov — free, takes 5 minutes online. Required before opening a business bank account, registering for CT tax accounts, hiring employees, or filing federal tax returns. (2) Register for Connecticut tax accounts via myconneCT at portal.ct.gov — creates unified CT DRS account spanning: CT Income Tax Withholding (if hiring employees), CT Sales & Use Tax (REQUIRED if selling retail goods or taxable services — 6.35% state, 7.75% luxury, 7.35% meals), CT Pass-Through Entity Tax / PET election (Form CT-1065/CT-1120SI annually if electing under Public Act 23-204 starting tax year 2024 for federal SALT-cap workaround). (3) Register with Connecticut Department of Labor at ctdol.state.ct.us — required if hiring CT employees; creates employer account for State Unemployment Insurance (SUI) + Connecticut New Hire Reporting + Paid Family and Medical Leave (PFML) program under Public Act 19-25 (0.5% employee payroll deduction to CT PFML Authority at ctpaidleave.org). (4) Register Workers' Compensation insurance — Connecticut requires workers' comp for ANY employer with 1+ employees under C.G.S. § 31-275 et seq Workers' Compensation Act. Procure through private carriers; CT does NOT have a state fund (unlike NY or OH). (5) Open a business bank account using your EIN and the CT Certificate of Organization. Connecticut-based bank options: Webster Bank (largest CT-headquartered bank, Waterbury HQ, ~$75B assets post-Sterling Bancorp merger), People's United Bank (acquired by M&T Bank 2022 but retains CT presence, Bridgeport), Liberty Bank (Middletown, largest CT mutual savings bank, ~$7.5B assets), Chelsea Groton Bank (Groton), Ion Bank (Naugatuck), Savings Bank of Danbury (Danbury), Thomaston Savings Bank, Bankwell (New Canaan), First County Bank (Stamford). Regional options: M&T Bank, Bank of America, JPMorgan Chase, Wells Fargo, Citizens Bank, Santander, Webster Bank. Credit unions: American Eagle Financial Credit Union (East Hartford, largest CT CU, ~$3B assets), Nutmeg State Financial Credit Union (Rocky Hill), Connex Credit Union (North Haven), Charter Oak Federal Credit Union (Waterford). Neobanks (Mercury, Relay, Bluevine) for e-commerce LLCs. (6) Draft an operating agreement defining member rights, profit distribution, decision-making, dispute resolution, and dissolution triggers — not legally required in CT under CULLCA (C.G.S. Title 34 Chapter 613a) but strongly recommended. CULLCA default rules apply absent an operating agreement, some of which may not match founder expectations (e.g., equal per-capita voting rights regardless of capital contribution under default). (7) Purchase general liability + product liability insurance. For HARTFORD INSURANCE supplier LLCs, errors & omissions (E&O) + professional liability typical $5M+ minimum. For STAMFORD/GREENWICH FUND SUPPLIER LLCs, cyber insurance + fidelity bond + professional liability typical. For GROTON SUBMARINE supplier LLCs, DoD contract-specific cyber insurance + CMMC 2.0 compliance + ITAR/EAR export-control insurance + product liability $10M+ minimum. For STRATFORD SIKORSKY / EAST HARTFORD PRATT & WHITNEY supplier LLCs, FAA aviation liability + product liability typically $10M+ minimum + ITAR compliance. For NEW HAVEN BIOTECH LLCs, clinical trial insurance + products liability + FDA regulatory coverage. (8) Register with city business registration where applicable (Hartford, New Haven, Bridgeport, Stamford, Norwalk, Waterbury, Danbury, New Britain, Greenwich) + industry-specific CT Department of Consumer Protection / Department of Banking / Department of Insurance / Department of Public Health / CT Bar Examining Committee / CT Gaming Commission licensing. (9) Obtain DBA / trade name registration at the town clerk level under C.G.S. § 35-1 if operating under a name other than the LLC's legal name — filed with the town clerk of each town where the LLC does business, not with the Secretary of State. (10) Mark calendar for CT annual report (March 31 every year, $80), federal 1065/1120S (March 15), federal 1040 (April 15), federal 1120 (April 15 if C-Corp elected), CT sales tax (monthly/quarterly via myconneCT based on volume), CT withholding (quarterly or monthly), CT PET election deadline if electing (with CT-1065/CT-1120SI return), CT PFML quarterly reporting, Workers' Compensation audit, property tax (October/January municipal cycles). Eleet AI's welcome packet walks every Connecticut LLC customer through all 10 post-formation steps with links, deadlines, and city-specific guidance.