How to Form C-Corp in Connecticut

Quick Answer

Forming a C-Corporation in Connecticut requires filing Articles of Incorporation with the Connecticut Secretary of State. As of April 10, 2026, contact the Secretary of State for current filing fees and processing times. Connecticut C-Corps face state income tax rates of 3-6.99% and must maintain a registered agent within the state.

Step-by-Step Formation Process

1. Choose and Reserve Your Corporate Name

   • Ensure your name includes “Corporation,” “Incorporated,” “Company,” or an abbreviation (Corp., Inc., Co.)
   • Check name availability through the Connecticut Secretary of State’s business name search
   • Consider reserving your name using Form CORP-1 if you’re not ready to file immediately

2. Appoint a Registered Agent

   • Select an individual or entity with a Connecticut street address (not P.O. Box)
   • The registered agent must be available during business hours to receive legal documents
   • You can serve as your own registered agent if you have a Connecticut address

3. Prepare Articles of Incorporation

   • Complete the official Articles of Incorporation form
   • Include required information: corporate name, registered agent details, number of authorized shares, and incorporator information
   • Specify the corporation’s purpose (can be general business purposes)

4. File Articles of Incorporation

   • Submit completed Articles of Incorporation to the Connecticut Secretary of State
   • Include the required filing fee (contact the Secretary of State for current amounts)
   • File online through the Secretary of State’s website or by mail

5. Obtain Federal EIN

   • Apply for an Employer Identification Number (EIN) with the IRS
   • Use IRS Form SS-4 or apply online at IRS.gov
   • Required for tax purposes and opening business bank accounts

6. Create Corporate Bylaws

   • Draft internal rules governing your corporation’s operations
   • Include procedures for meetings, voting, and officer duties
   • Not filed with the state but essential for corporate governance

7. Hold Organizational Meeting

   • Conduct first board of directors meeting
   • Adopt bylaws, elect officers, and issue initial stock certificates
   • Document proceedings in corporate minutes

Costs Breakdown

As of April 10, 2026, contact the Connecticut Secretary of State for current fee information. Typical C-Corporation formation costs may include:

Service	Estimated Cost
Articles of Incorporation Filing Fee	Contact Secretary of State
Name Reservation (if needed)	Contact Secretary of State
Registered Agent Service (annual)	$100-$300
EIN Application	Free (direct from IRS)
Corporate Seal	$20-$50
Stock Certificates	$20-$100

Note: Fees change periodically. Always verify current amounts with the Connecticut Secretary of State before filing.

Requirements Checklist

Before filing your Connecticut C-Corporation, ensure you have:

• Chosen an available corporate name ending with appropriate designation
• Selected a registered agent with Connecticut street address
• Determined number and type of authorized shares
• Identified initial directors and officers
• Prepared registered agent’s written consent
• Gathered incorporator information
• Calculated total filing fees
• Decided on par value for shares (if any)

Tax Implications

Connecticut C-Corporations face several tax obligations:

State Income Tax: Connecticut imposes corporate income tax at rates of 3-6.99% on net income, as of April 10, 2026. The rate structure may vary based on income levels.

Federal Income Tax: C-Corporations pay federal corporate income tax on profits at current federal rates, separate from shareholders’ personal tax obligations.

Double Taxation: C-Corps experience double taxation - the corporation pays tax on profits, and shareholders pay personal income tax on dividends received.

Sales Tax: Connecticut’s base sales tax rate is 6.35% as of April 10, 2026. C-Corporations must collect and remit sales tax on taxable goods and services sold within the state.

Employment Taxes: If hiring employees, the corporation must withhold and pay federal and state employment taxes, including Social Security, Medicare, and unemployment taxes.

Estimated Tax Payments: Corporations typically must make quarterly estimated tax payments to avoid penalties.

Ongoing Obligations

Connecticut C-Corporations must fulfill several ongoing compliance requirements:

Annual Reports: Contact the Connecticut Secretary of State for current annual report requirements, filing deadlines, and associated fees.

Tax Filings: File annual Connecticut corporate income tax returns and federal Form 1120. Due dates typically align with federal requirements but verify current deadlines.

Corporate Records: Maintain corporate books and records, including meeting minutes, stock ledgers, and financial records.

Board Meetings: Hold regular board of directors meetings and annual shareholder meetings as required by bylaws and state law.

Registered Agent Maintenance: Ensure continuous registered agent service and promptly update the state if changing agents.

Business License Renewals: Renew any required business licenses or permits according to their individual schedules.

Registered Agent

Connecticut law requires every corporation to maintain a registered agent within the state. The registered agent serves as the corporation’s official point of contact for legal documents, tax notices, and government correspondence.

Requirements: The registered agent must have a Connecticut street address (P.O. boxes not acceptable) and be available during normal business hours. The agent can be an individual resident of Connecticut or a business entity authorized to conduct business in the state.

Options: You can serve as your own registered agent if you have a Connecticut address and will be available during business hours. Alternatively, professional registered agent services provide reliable service and privacy protection, typically charging $100-$300 annually.

Responsibilities: The registered agent receives service of process, tax notices, and official government correspondence on behalf of the corporation. They must promptly forward all documents to the appropriate corporate officers.

Common Mistakes to Avoid

1. Inadequate Name Search: Failing to thoroughly research name availability can result in rejection or future trademark conflicts. Check both state records and federal trademark databases.

2. Improper Registered Agent Selection: Choosing an unreliable registered agent or using a P.O. box address violates state requirements and can lead to missed important documents.

3. Insufficient Share Authorization: Authorizing too few shares can require expensive amendments later. Consider future growth when determining authorized share quantities.

4. Incomplete Corporate Formalities: Skipping bylaws creation, organizational meetings, or proper record-keeping can jeopardize limited liability protection.

5. Mixing Personal and Corporate Finances: Failing to maintain separate bank accounts and financial records can result in “piercing the corporate veil” and personal liability exposure.

6. Ignoring Tax Elections: Missing deadlines for beneficial tax elections (like S-Corp status) can result in unfavorable tax treatment.

7. Delayed EIN Application: Postponing EIN acquisition can delay bank account opening and other essential business setup tasks.

Related Guides

• How to Form C-Corp in Ohio: 2026 Step-by-Step Guide ($99 Fee)
• How to Form LLC in Connecticut: 2026 Step-by-Step Guide
• How to Form C-Corp in Alabama: 2026 Step-by-Step Guide
• How to Form C-Corp in Alaska: 2026 Step-by-Step Guide
• How to Form C-Corp in Arizona: 2026 Step-by-Step Guide

FAQ

How long does it take to form a C-Corporation in Connecticut?

Processing times vary depending on filing method and current Secretary of State workload. Contact the Connecticut Secretary of State for current processing timeframes. Online filings typically process faster than mail submissions. Expedited processing may be available for additional fees.

Can I form a Connecticut C-Corporation if I live in another state?

Yes, you can incorporate in Connecticut regardless of your residence. However, you must maintain a registered agent with a Connecticut street address. Many out-of-state business owners use professional registered agent services to meet this requirement.

What’s the minimum number of directors required for a Connecticut C-Corporation?

Connecticut law allows corporations to have as few as one director. The exact number should be specified in your articles of incorporation and bylaws. Directors must be natural persons but don’t need to be Connecticut residents or shareholders.

Do I need an attorney to form a C-Corporation in Connecticut?

While not legally required, consulting an attorney is advisable for complex situations or when you need guidance on corporate structure, tax implications, or compliance requirements. Simple formations can often be completed without legal assistance using proper forms and instructions.

Can I change my corporation’s name after formation?

Yes, but it requires filing Articles of Amendment with the Connecticut Secretary of State and paying applicable fees. The new name must be available and meet Connecticut’s corporate naming requirements. You’ll also need to update all business documents, contracts, and accounts.

What happens if I don’t file required annual reports?

Failure to file required reports and pay associated fees can result in administrative dissolution of your corporation. This means losing good standing status and potentially facing reinstatement fees. Contact the Secretary of State immediately if you’ve missed filing deadlines.

How many shares should I authorize in my Articles of Incorporation?

Consider authorizing more shares than you initially need to accommodate future growth without requiring expensive amendments. However, some states base fees on authorized shares, so balance flexibility with cost considerations. Common authorizations range from 1,000 to 10,000,000 shares.

Can a C-Corporation elect S-Corporation tax status?

Yes, eligible C-Corporations can elect S-Corporation tax treatment by filing IRS Form 2553 within specific deadlines. This election allows pass-through taxation, avoiding double taxation while maintaining corporate structure. Consult a tax professional to determine eligibility and timing.

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This article provides general information for educational purposes only and should not be considered legal or tax advice. Business formation requirements and tax obligations can change, and individual circumstances vary. Consult with qualified attorneys and accountants for advice specific to your situation. Always verify current fees and requirements directly with the Connecticut Secretary of State before filing.