Colorado vs Connecticut LLC: fees, taxes, and which to pick
Data last updated: Apr 21, 2026Colorado charges $50 to form an LLC; Connecticut charges $120. Day-one sticker price is only part of the story, since most of the real cost comes from the annual obligations that stack up each year you keep the LLC open.
Over a rolling three-year window, Colorado runs about $235 less in total state fees than Connecticut. Whether that gap matters depends on whether you actually operate in one of these states or are weighing a non-resident filing.
On speed, Colorado typically clears standard online filings faster than Connecticut. Both states offer expedited tiers at an additional cost for filers on tight timelines.
For most small operators the choice is not really between these two states at all. It is between forming where the business actually operates and trying to route through a non-resident filing. The data below shows what each option actually costs.
Key differences at a glance
- Colorado costs $70 less to form ($50 vs $120).
- Colorado is $55 per year cheaper to maintain ($125 vs $180).
Where each state fits
For most filers, forming in the state you actually operate from is the right call. The side-by-side below shows where the two states meaningfully diverge.
What each state offers that the other does not
Only Connecticut
- Paid expedited tier
Both states
- Online filing
- No entity-level franchise or LLC tax
- No publication requirement
- Operating agreement not statutorily required
Three-year cost, side by side
Rough estimate of the state-facing cost to form and keep an LLC through three years. Both totals include a $100 per year registered-agent estimate.
Running total includes the one-time filing fee and annual ongoing costs (report fee or franchise tax plus a $100/year registered agent estimate).
What it costs under your specific situation
The table below runs the same LLC through four common scenarios. "Non-resident" rows assume a typical home-state foreign LLC registration adds about $200 per year of stacked cost; the real number depends on which state you live in and ranges from $50 to over $800 depending on jurisdiction.
| Scenario | Year 1 | Each year after | 3-year total |
|---|---|---|---|
| You live in Colorado, business operates there No foreign LLC registration needed. You pay Colorado fees only. | $175 | $125 | $425 |
| You live in Connecticut, business operates there No foreign LLC registration needed. You pay Connecticut fees only. | $300 | $180 | $660 |
| Non-resident forming in Colorado with operations elsewhere You pay Colorado's fees plus a typical home-state foreign LLC registration of about $200 per year. | $375 | $325 | $1,025 |
| Non-resident forming in Connecticut with operations elsewhere You pay Connecticut's fees plus a typical home-state foreign LLC registration of about $200 per year. | $500 | $380 | $1,260 |
Colorado vs Connecticut: full comparison
| Dimension | Colorado | Connecticut |
|---|---|---|
| Online filing Can you file the formation document online? | Yes | Yes |
| Online approval time Standard, non-expedited | 1 business day | 5 business days |
| Expedited option Paid fast-track filing | Not offered | $50 |
| Annual report Required in addition to tax | Required, $25 | Required, $80 |
| State-imposed annual tax Franchise, privilege, or LLC tax minimum | None | None |
| State income tax On pass-through LLC income at member level | Yes | Yes |
| Publication requirement Newspaper publication after formation | No | No |
| Operating agreement Required by state statute | Recommended, not required | Recommended, not required |
| Foreign LLC fee Cost to register as a foreign LLC in this state | $100 | $120 |
| State sales tax General statewide rate | 2.9% | 6.3% |
Taxes in Colorado and Connecticut
How each state handles entity-level tax on LLCs. Pass-through classification means member-level income tax also applies at each member's residence state.
Colorado tax
No entity-level franchise tax on LLCs. State income tax applies to member-level pass-through income. Corporate rate 4.4%.
Connecticut tax
No entity-level franchise tax on LLCs. State income tax applies to member-level pass-through income. Corporate rate 7.5%.
Ongoing compliance
The recurring filings each state requires after formation.
Colorado
Annual report $25, due on your anniversary month. Registered agent required in Colorado.
Connecticut
Annual report $80, due 03/31 each year. Registered agent required in Connecticut.
Formation process, side by side
What actually happens from the moment you start filing to the moment you're in good standing. Use this as a checklist.
Colorado
- Check business-name availability on the Colorado entity search.
- Appoint a registered agent with a physical Colorado street address.
- File Articles of Organization for a Limited Liability Company for $50.
- Wait for approval. Online typically 1 business days. No paid expedite offered.
- Adopt an operating agreement (recommended, not required by Colorado statute).
- Apply for a federal EIN (free from the IRS).
- Open a business bank account to separate personal and business finances.
- File your first annual report and pay $25 when it comes due.
Connecticut
- Check business-name availability on the Connecticut entity search.
- Appoint a registered agent with a physical Connecticut street address.
- File Certificate of Organization (Limited Liability Company, Domestic) for $120.
- Wait for approval. Online typically 5 business days. Paid expedite from $50.
- Adopt an operating agreement (recommended, not required by Connecticut statute).
- Apply for a federal EIN (free from the IRS).
- Open a business bank account to separate personal and business finances.
- File your first annual report and pay $80 when it comes due.
Before you pick either state
A few things that apply no matter which state you choose. These trip up enough first-time filers that they're worth stating explicitly.
Registered agent is non-negotiable. Both Colorado and Connecticut (and every other US state) require every LLC to designate a registered agent with a physical street address in the state of formation. You can serve as your own agent if you live in the state; otherwise a commercial agent runs $50 to $125 per year. Using your own home address makes it part of the public record.
Forming elsewhere does not escape your home state's tax. If you live and operate a business from your home state, forming the LLC in Colorado or Connecticut does not avoid your home state's income tax. The moment you transact business at home, your home state requires a foreign LLC registration, and state tax liability follows your residence regardless of where the entity sits on paper.
EIN applications are free. The IRS issues Employer Identification Numbers directly at no cost. Any service charging you to "get your EIN" is reselling a free form submission. Single-member LLCs with no employees technically don't need one for federal tax, but nearly every bank requires an EIN to open a business account.
Operating agreement matters more than the state you pick. A well-drafted operating agreement governs member ownership, management, profit splits, buy-sell terms, and dissolution. Without one, your LLC runs on the state's default rules, which are rarely what you want. California, Maine, Missouri, and New York require a written one by statute; every other state treats it as strongly recommended.
Agency contacts
Colorado Secretary of State - Business Division
- Website
- www.coloradosos.gov/pubs/business/main.html
- Phone
- (303) 894-2200
- sos.business@coloradosos.gov
- Colorado Secretary of State, 1700 Broadway, Suite 550, Denver, CO 80290
- Office
- 1700 Broadway, Suite 550, Denver, CO 80290
- Hours
- 8:00 AM to 5:00 PM Mountain, Monday to Friday
Connecticut Secretary of the State, Business Services Division
- Website
- portal.ct.gov/sots
- Phone
- (860) 509-6003
- Business Services Division, P.O. Box 150470, Hartford, CT 06115-0470
- Office
- 165 Capitol Avenue, Suite 1000, Hartford, CT 06106
- Hours
- 8:30 AM to 4:30 PM Eastern, Monday to Friday
Colorado Department of Revenue - Taxation Division
- Website
- tax.colorado.gov
- Phone
- (303) 238-7378
- Colorado Department of Revenue, P.O. Box 17087, Denver, CO 80217-0087
- Office
- 1881 Pierce St, Lakewood, CO 80214
- Hours
- 8:00 AM to 4:30 PM Mountain, Monday to Friday
Connecticut Department of Revenue Services
- Website
- portal.ct.gov/drs
- Phone
- (860) 297-5962
- drs@ct.gov
- 450 Columbus Boulevard, Suite 1, Hartford, CT 06103
- Hours
- 8:30 AM to 4:30 PM Eastern, Monday to Friday
Frequently Asked Questions
-
Is it cheaper to form an LLC in Colorado or Connecticut?
Colorado is cheaper at formation ($50) than Connecticut ($120). Ongoing costs are also different: $125 vs $180 per year. Total over three years: $425 vs $660.
-
Can I form an LLC in Colorado if I live in Connecticut?
Yes, but your Connecticut business will almost certainly need to register as a foreign LLC in Connecticut too, which means paying Connecticut's foreign registration fee and any ongoing Connecticut obligations on top of the Colorado ones. The "form elsewhere to save" math usually doesn't work for operating businesses; it only works when you have no physical operations tied to any specific state.
-
How long does it take to form an LLC in Colorado vs Connecticut?
Colorado online: 1 business day; Connecticut online: 5 business days. Colorado does not offer paid expedite. Connecticut offers paid expedite from $50.
-
Which state has lower taxes for an LLC, Colorado or Connecticut?
Colorado: state income tax applies to member-level pass-through income, no entity-level franchise or LLC tax. Connecticut: state income tax applies to member-level pass-through income, no entity-level franchise or LLC tax.
-
Do both states require a registered agent?
Yes. Every US state (and DC) requires every LLC to maintain a registered agent with a physical street address in the state. Colorado and Connecticut both have this requirement. You can serve as your own agent if you live in the state; most out-of-state filers use a commercial agent for $50 to $125 per year.
-
Which state should I pick if I run an online business from home?
Form in the state you actually live in. Your home state's Department of Revenue treats your residence as nexus regardless of where the LLC is filed, which means you owe state income tax there anyway. Forming in Colorado or Connecticut to escape your home state's tax doesn't work; it adds paperwork. The non-resident filings make sense when you genuinely operate nowhere in particular: international founders, purely passive holding entities, or real-estate LLCs owning property in other states.
Full state guides
More Colorado and Connecticut comparisons
More Colorado vs ...
Sources
- Filing fee: www.sos.state.co.us/pubs/info_center/fees/business.html · verified April 21, 2026
Colorado Secretary of State Business Organizations Fee Schedule: 'Limited liability company - Articles of Organization' = $50.00 online fee. Colorado accepts electronic filings only; there is no paper-filing option for new LLC Articles of Organization. - Expedited filing: www.sos.state.co.us/pubs/info_center/fees/business.html · verified April 21, 2026
Colorado does not offer expedited processing for standard online LLC filings because online filings are effectively processed same day (typically within 1 business day). An 'Expedited Service' line for paper document filing at $150 exists on the fee schedule, but it applies only to the limited categories of paper filings Colorado still accepts. For the LLC Articles of Organization (online-only), expedited service is not offered. - Foreign LLC registration fee: www.sos.state.co.us/pubs/info_center/fees/business.html · verified April 21, 2026
Foreign Entity Authority Statement = $100.00 online fee. - Operating agreement requirement: law.justia.com/codes/colorado/title-7/limited-liability-companies/arti… · verified April 21, 2026
C.R.S. §7-80-108 (Colorado Limited Liability Company Act). Operating agreements are permitted but not required, and need not be in writing except where a written form is specifically required (e.g. certain transfer restrictions under §7-80-108(3)). Recorded as not required. Justia is used here as a neutral statute mirror because the official Colorado legislative site (leg.colorado.gov) does not expose a stable per-section URL and the SoS reference page lists statutes only as PDF downloads. - Publication requirement: www.sos.state.co.us/pubs/info_center/laws/CRSTitle7index.html · verified April 21, 2026
Colorado imposes no LLC newspaper publication requirement. Colorado Title 7 Article 80 (the Colorado Limited Liability Company Act) contains no publication provision. - Annual report fee: www.sos.state.co.us/pubs/info_center/fees/business.html · verified April 21, 2026
Periodic Report = $25.00 online (online filing is the only option). Periodic Report Late Filing Penalty = $50.00. Fee increased from $10 to $25 effective July 1, 2024 per Colorado SoS press release. - Annual report: www.sos.state.co.us/pubs/business/FAQs/reports.html · verified April 21, 2026
SoS Periodic Reports FAQ (Q4): 'The Periodic Report can be filed two months prior to the Periodic Report month or two months after without any penalty.' The Periodic Report month corresponds to the month the entity was originally formed or registered in Colorado. Statutory basis: C.R.S. §7-90-501. - Franchise tax: tax.colorado.gov/corporate-income-tax-guide · verified April 21, 2026
Colorado has no franchise tax on LLCs or corporations. The Department of Revenue publishes only corporate income tax (flat 4.4%) and individual income tax (flat 4.4%) guidance; no capital-based or share-based franchise tax exists. - Corporate income tax rate: tax.colorado.gov/corporate-income-tax-guide · verified April 21, 2026
Colorado corporate income tax is a flat 4.4% rate on federal taxable income attributable to Colorado (C.R.S. §39-22-301), tax year 2024 and forward. LLCs are pass-through by default and do not owe corporate income tax unless they elect C-corp taxation. A Pass-Through Entity (SALT Parity) election allows LLCs to pay at entity level at the same 4.4% rate. - Sales tax rate: tax.colorado.gov/sales-tax-guide · verified April 21, 2026
Colorado statewide sales tax rate is 2.9%. Many Colorado cities are 'home-rule' and self-administer local sales tax, so combined state+local rates vary widely (commonly 4%-11%+). Only the 2.9% statewide rate is recorded here. - Business name search: www.coloradosos.gov/biz/BusinessEntityCriteriaExt.do · verified April 21, 2026
Colorado SoS Business Database Search. Resolves successfully in 2026. Note: the coloradosos.gov and sos.state.co.us domains both serve the same SoS website. - Filing fee: business.ct.gov/knowledge-base/articles/domestic-limited-liability-com… · verified April 21, 2026
Connecticut Secretary of the State Business Services: Certificate of Organization (formation of a domestic LLC) fee is $120. Same fee applies whether filed online through Business.CT.gov or by mail. - Expedited filing: business.ct.gov/knowledge-base/articles/expedited-services · verified April 21, 2026
Connecticut expedited service fee is $50 per transaction. Expedited service is only available for online filings through Business.CT.gov (not available for mail). Expedited filings typically process within 24 hours. - Annual report fee: business.ct.gov/knowledge-base/articles/domestic-limited-liability-com… · verified April 21, 2026
Annual Report fee = $80, filed online between January 1 and March 31 each year. Same $80 fee applies to foreign LLCs (Foreign Annual Report). - Franchise tax: www.cttaxalert.com/2019/08/business-entity-tax-repeal/ · verified April 21, 2026
Connecticut Public Act 19-117 (2019 budget bill) repealed the $250 biennial Business Entity Tax (Conn. Gen. Stat. Sec. 12-284b) effective for tax years beginning on or after January 1, 2020. Connecticut no longer imposes a franchise tax or business entity tax on LLCs. Flagged as applies: false per the instructions. - Foreign LLC registration fee: business.ct.gov/knowledge-base/articles/foreign-limited-liability-comp… · verified April 21, 2026
Connecticut Foreign Registration Statement (foreign LLC): $120 filing fee, matching the domestic Certificate of Organization. Foreign LLCs also file the $80 Annual Report between January 1 and March 31. - Sales tax rate: portal.ct.gov/drs/sales-tax/sales-and-use-tax-information · verified April 21, 2026
Connecticut Department of Revenue Services: statewide general sales and use tax rate is 6.35%. Connecticut does not authorize local sales taxes. A higher 7.75% rate applies to certain luxury goods and a 1% rate applies to computer and data processing services. - Corporate income tax rate: portal.ct.gov/drs/corporation-tax/corporation-business-tax · verified April 21, 2026
Connecticut Corporation Business Tax (CBT) base rate is 7.5% on net income. A 10% CBT surtax has been extended through income years beginning before January 1, 2026 by Public Act 24-151. The 7.5% is Connecticut's income-only corporate rate; the surtax and PTET are noted in taxes.notes rather than folded into this number. - Business name search: service.ct.gov/business/s/onlinebusinesssearch?language=en_US · verified April 21, 2026
Connecticut Business Records Search via the CT.gov portal. Use before filing to confirm name availability. - Online filing portal: business.ct.gov/ · verified April 21, 2026
Business.CT.gov is the official online filing portal for Connecticut business formation, annual reports, and amendments. Filings typically complete within 3 to 5 business days (standard) or about 1 business day with the $50 expedited fee. - Operating agreement requirement: law.justia.com/codes/connecticut/title-34/chapter-613a/section-34-243d… · verified April 21, 2026
Conn. Gen. Stat. Sec. 34-243a defines an operating agreement as the agreement of all members whether oral, implied, in a record, or any combination. No statutory requirement that the agreement be written or filed. Recorded as not required. - Publication requirement: law.justia.com/codes/connecticut/title-34/chapter-613a/ · verified April 21, 2026
Connecticut Uniform Limited Liability Company Act (Chapter 613a) contains no newspaper publication requirement. LLCs are not required to publish notice of formation.