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State Guide

EIN in Connecticut (CT)

How to get an EIN for your Connecticut business. The EIN is a federal number from the IRS. Connecticut has 3-6.99% state income tax.

Getting an EIN in Connecticut follows the same federal IRS process as every other state. The EIN is a federal number — not state-specific. Connecticut (CT) has 3-6.99% state income tax. Your EIN (XX-XXXXXXX) is issued by the IRS and works nationwide. Apply free at irs.gov (SSN required) or through ein.so ($49 for non-residents).

Connecticut

EIN in Connecticut (CT)

| Detail | Information | |--------|------------| | State | Connecticut (CT) | | State Income Tax | 3-6.99% state income tax | | LLC Filing Fee | $120 filing fee | | State Tax Authority | Department of Revenue Services | | Federal EIN | Same as all states (IRS) | | EIN Cost | $0 (IRS) / $49 (ein.so) |

Federal EIN vs Connecticut State Tax ID

Your federal EIN and Connecticut state tax registration are separate:

  • Federal EIN — From IRS, for federal taxes (Form SS-4)
  • Connecticut State Tax ID — From Department of Revenue Services, for state taxes

You may need both. Your EIN does not replace state tax registration.

See state tax ID for more details.

How to Apply

How to Get an EIN in Connecticut

| Method | Speed | Cost | |--------|-------|------| | Online | Instant | Free | | Fax | 4-7 days | Free/$49 | | Phone | Same day | Free | | Mail | 4-6 weeks | Free |

The process is identical regardless of state. See how to get an EIN for complete instructions.

Connecticut Business Requirements After EIN

  1. Register with Department of Revenue Services for state taxes
  2. Obtain local business licenses
  3. File BOI report with FinCEN (federal)
  4. Open a business bank account

Other States

EIN in Other States

Louisiana | Kentucky | Iowa | Utah

Browse all: EIN by State

Apply for your EIN — $49

Frequently Asked Questions

Is a Connecticut EIN different from a federal EIN?

No. The EIN is a federal number issued by the IRS. It is the same 9-digit number regardless of which state you operate in. Connecticut does not issue its own version of an EIN.

How do I get an EIN in Connecticut?

Apply through the IRS: online at irs.gov (instant, SSN required), by fax to 855-215-1627 (4-7 days), by phone at 800-829-4933 (same day), or through ein.so ($49 for non-residents).

Does Connecticut have a state tax ID?

Yes. Connecticut issues its own state tax registration through the Department of Revenue Services. This is separate from your federal EIN. You may need both depending on your business activities in Connecticut.

How much does it cost to get an EIN in Connecticut?

The EIN is free from the IRS ($0). Connecticut LLC formation costs $120 filing fee. ein.so charges $49 for EIN filing assistance for non-residents.

What is the Connecticut state income tax rate?

Connecticut has 3-6.99% state income tax. This is separate from federal taxes. Your EIN is used for federal tax reporting, while your state tax ID is used for Connecticut state taxes.

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