Connecticut Business Compliance Checklist
Connecticut has both a Business Entity Tax and higher-than-average LLC formation cost. This page covers everything from filing fees to sales tax to hiring laws.
$120
$80
Every year
6.35%
state base rate
No
1. Entity Formation
| LLC filing fee (Articles of Organization) | $120 |
| Corp filing fee (Articles of Incorporation) | $250 |
| Registered agent required | Yes — must have a physical address in the state |
| Publication requirement | No |
| Processing time | ~7 business days (expedited available for extra fee) |
2. Annual Maintenance
| Annual/periodic report | Every year — fee $80 |
| Franchise tax | None |
3. Sales Tax
| State base rate | 6.35% |
| Combined rate range (with local) | 6.35% – 6.35% |
| Economic nexus (out-of-state seller) | $100,000 OR 200 transactions per year |
| Marketplace facilitator law | Yes — marketplaces (Amazon, Etsy) collect on your behalf. |
Need to check nexus across multiple states? Use our Sales Tax Nexus Checker.
4. Employer Requirements
| Minimum wage | $16.35/hr (2025) |
| Paid sick leave law | Statewide mandate |
| Non-compete enforceability | Enforceable — reasonable scope and duration required |
| Contractor classification test | Common-law (IRS) test |
Full employment law breakdown: Connecticut Hiring Laws.
5. Workers' Compensation
Connecticut allows private-market workers' comp insurance (competitive market). Coverage is required starting with your first employee.
Estimate your premium with our Workers' Comp Calculator.
6. State Income Tax
Progressive brackets — top marginal rate is 6.99%.
Compliance by Business Structure
Pick your structure to see structure-specific compliance items.
What Makes Connecticut Distinctive
Compliance quirks and rules that separate Connecticut from other states — worth understanding before you file.
- Connecticut charges $120 for LLC formation and $80 for the annual report — modestly above the national median.
- Connecticut previously had a Business Entity Tax of $250 every 2 years but repealed it in 2019 — still a common misconception.
- Connecticut requires a Certificate of Authority for foreign entities doing business in the state, filed through the SOTS portal.
This is a reference, not legal advice.
State fees and rules change. Verify current values with the Connecticut Secretary of State, Department of Revenue, and Department of Labor before filing. For complex situations, consult a licensed CPA or attorney.