Connecticut LLC EIN (2026)
Learn when a Connecticut LLC needs an EIN in 2026, how to apply through the IRS for free, and how EIN timing affects banking, payroll, and tax accounts.
LLC Route Editorial Team
Reviewed against official state and federal resources.
Updated July 28, 2026
Educational guide, not legal or tax advice.
A Connecticut LLC EIN is a federal tax ID from the IRS. It is not issued by the Connecticut Secretary of the State and is not included in the $120 Certificate of Organization filing.
Educational note: This guide is for general informational purposes only. It is not legal, tax, accounting, or financial advice. Confirm EIN and tax registration requirements with IRS, Connecticut DRS, and qualified professionals.
Quick answer
| Question | Practical answer |
|---|---|
| EIN cost | $0 from IRS if requested directly |
| Should you apply before formation? | Usually wait until the LLC is accepted |
| Is EIN required for every LLC? | Not always, but many LLCs need one |
| Does EIN register Connecticut sales tax? | No |
| Does EIN create withholding accounts? | No |
| Can non-U.S. owners apply? | Often yes, but the online tool may not work without SSN/ITIN |
When a Connecticut LLC commonly needs an EIN
| Situation | EIN usually needed? |
|---|---|
| Hiring employees | Yes |
| Multi-member LLC | Yes |
| Opening a business bank account | Often required |
| Electing S corporation or C corporation tax status | Yes |
| Registering certain tax accounts | Often required |
| Single-member LLC with no employees | Sometimes not legally required, but often useful |
Best timing
For most filers:
- File the Connecticut Certificate of Organization.
- Wait for the accepted legal name and business record.
- Apply for EIN using the exact LLC name.
- Save the IRS confirmation letter.
- Use the EIN consistently for bank, tax, payroll, and license accounts.
This reduces mismatches if the state filing is rejected or the name changes.
EIN is not DRS registration
After getting an EIN, the LLC may still need to register with Connecticut Department of Revenue Services for:
- Sales and use tax
- Withholding tax
- Business entity tax or pass-through entity tax matters, if applicable
- Corporation business tax if taxed as a corporation
- Other activity-specific tax accounts
The EIN is a federal identifier. Connecticut DRS registration is separate.
Non-U.S. owners
The IRS online EIN application usually requires a responsible party with a U.S. taxpayer identification number. If no owner has an SSN or ITIN, the LLC may need to apply by fax or mail using Form SS-4.
The EIN itself is still free from IRS. Third-party fees are service fees, not IRS fees.
Common mistakes
Paying for an EIN without knowing IRS is free
Formation companies may charge for assistance. The IRS EIN is free.
Applying with a name that does not match the accepted LLC
Use the exact Connecticut legal name, including the LLC designator.
Confusing EIN with a sales tax permit
Connecticut sales and use tax permit is separate and has its own fee.
Applying for tax accounts before knowing what applies
Register for the accounts the business actually needs; some accounts create ongoing filing duties.
EIN FAQ
Is EIN free for a Connecticut LLC?
Yes, when requested directly from IRS.
Does every Connecticut single-member LLC need an EIN?
Not always, but banks, payroll, tax elections, and privacy reasons often make an EIN useful.
Does EIN mean the LLC is taxed as a corporation?
No. EIN is only an identifier. Corporate or S corporation tax treatment requires separate tax classification rules or elections.
Does EIN replace the annual report?
No. The annual report is filed with Connecticut Secretary of the State.
Official resources
- IRS EIN application
- IRS Form SS-4
- Connecticut DRS register your business
- Connecticut domestic LLC forms and fees
Related Connecticut LLC topics
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