Connecticut Business Registration Cost — 2026
Find out exactly what it costs to register and maintain a business including state filing fees and annual requirements.
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Quick Connecticut Tax Estimate
Based on Connecticut's tax rates for 2026. Enter your details for a personalized calculation.
State Tax on $80K Profit
$1,651.17
SE Tax
$11,303.64
Effective Rate
22.2%
Marginal Rate
12%
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Connecticut Tax Information
State Income TaxYes
Top Marginal Rate7%
Sales Tax0%
LLC Filing Fee$0
Annual Report Fee$None
Standard DeductionN/A
Self-employed pay both federal and Connecticut state tax.
Connecticut Income Tax Brackets (2026)
| Tax Rate | From | To |
|---|---|---|
| 2% | $0 | $10,000 |
| 4.5% | $10,000 | $50,000 |
| 5.5% | $50,000 | $100,000 |
| 6% | $100,000 | $200,000 |
| 6.5% | $200,000 | $250,000 |
| 6.9% | $250,000 | $500,000 |
| 7% | $500,000 | No limit |
Connecticut Quarterly Tax Deadlines
Q1
Apr 15
Q2
Jun 16
Q3
Sep 15
Q4
Jan 15
Frequently Asked Questions
How much does it cost to register a business in Connecticut?
LLC filing fees vary by state. Additional costs: registered agent ($50-300/year), business licenses, EIN (free), DBA registration if using a trade name. See the full breakdown above.
Do I need a business license in Connecticut?
Most businesses need a general business license from the city/county. Professional licenses may be required for specific trades. Connecticut has specific requirements — check the business registration page.
What are the annual fees for an LLC in Connecticut?
Annual report/franchise tax fees vary significantly. Some states have zero annual fees, others charge $800+ (California). Failure to file can result in penalties or administrative dissolution.
Disclaimer:This calculator provides estimates for informational purposes only. It does not constitute tax advice, financial advice, or legal advice. Tax laws change frequently and vary by individual circumstances. Results may not reflect your actual tax liability. Always consult a qualified CPA, tax professional, or financial advisor before making tax decisions. For official tax information, visit IRS.gov.