How much does it cost to form an LLC in Connecticut?
The Connecticut LLC filing fee is $120. Annual fees are $0/year. You'll also need a registered agent (~$125/year).
How to Form a Business in Connecticut
Compare entity types, see Connecticut filing fees, and find the right structure for your business.
Connecticut Formation Costs
| Cost | LLC | Corporation |
|---|---|---|
| Filing fee | $120 | $250 |
| Annual fee | $0 | $0 |
| Annual report fee | $80 | |
| Registered agent (typical) | ~$125/yr | |
⚠Entity-level tax on S-Corps at corporate rate
⚠Business entity tax of $250 biennially
Connecticut Tax Overview
Connecticut has progressive state income tax brackets:
| Income Range | Rate |
|---|---|
| $0 - $10,000 | 3.00% |
| $10,000 - $50,000 | 5.00% |
| $50,000 - $100,000 | 5.50% |
| $100,000 - $200,000 | 6.00% |
| $200,000 - $250,000 | 6.50% |
| $250,000 - $500,000 | 6.90% |
| $500,000 - + | 6.99% |
Note: Connecticut imposes a 7.0% entity-level tax on S-Corporations.
Entity Types Compared
Sole Proprietorship
The simplest structure. You and your business are the same legal entity.
Pros
- +No formation paperwork or fees
- +No separate tax return — report on Schedule C
- +Full control over all decisions
Cons
- -No liability protection — personal assets at risk
- -Self-employment tax on ALL profit (15.3%)
- -Harder to raise funding
Limited Liability Company
Liability protection with pass-through taxation. The most popular choice for small businesses.
Pros
- +Personal assets protected from business debts
- +Pass-through taxation — no double tax
- +Flexible management structure
Cons
- -Self-employment tax on all profit (same as sole prop)
- -State filing fees and annual fees
- -Some states have franchise taxes (e.g., CA $800/yr)
S Corporation
An LLC or Corp with an S-Corp tax election. Splits income into salary + distributions to reduce self-employment tax.
Pros
- +Save thousands in self-employment tax
- +Only pay payroll tax on salary, not distributions
- +Liability protection
Cons
- -Must pay yourself a "reasonable salary"
- -Payroll requirements ($1-2K/yr in CPA and payroll costs)
- -More complex tax filing (Form 1120-S)
C Corporation
A separate legal entity with its own tax rate. The standard structure for VC-funded startups.
Pros
- +Can raise venture capital and issue stock options
- +Multiple share classes for investors
- +No ownership restrictions
Cons
- -Double taxation: corporate tax + dividend tax
- -Most complex and expensive to maintain
- -Board of directors required
Not sure which is right for you?
Our free quiz calculates your actual tax burden under each entity type based on your income and Connecticut tax rates.
Take the QuizCompare Entity Types in Connecticut
Form Your Business in Connecticut
ZenBusinessRecommended
LLC: $0 + state feeStart your business for $0 + state fees
Northwest Registered AgentRecommended
LLC: $39 + state feePrivacy by default. Registered agent included for life.
Bizee (formerly Incfile)
LLC: $0 + state feeFree LLC formation with no hidden costs
Affiliate disclosure: Links above are affiliate links. We may earn a commission at no extra cost to you.
Frequently Asked Questions: Connecticut Business Formation
Does Connecticut have state income tax?
Yes. Connecticut has a progressive income tax with rates ranging from 3.0% to 7.0%.
Should I form an LLC or S-Corp in Connecticut?
It depends on your income. If your Connecticut business earns under $80K/year, a standard LLC is simpler and cheaper. Above $80K, an S-Corp election can save thousands in self-employment tax by splitting income into salary and distributions. Note: Connecticut imposes a 7.0% entity-level tax on S-Corps, which reduces the savings. Use our free quiz to calculate your exact savings.
What is the cheapest state to form an LLC?
States like Kentucky ($40), Arizona ($50), Colorado ($50), and Arkansas ($45) have the lowest LLC filing fees. However, forming in your home state is usually best — forming out-of-state means you'll need to register as a foreign LLC in your home state anyway, doubling fees.
Disclaimer
Filing fees, tax rates, and regulatory requirements on this page are based on publicly available data and may not reflect recent changes. This information is provided for educational purposes only and does not constitute tax, legal, or financial advice. State requirements can change — verify all fees and requirements with the Connecticut Secretary of State or a qualified attorney before filing. Always consult a CPA or tax attorney for advice specific to your situation.