Connecticut REG-1 Form: How To register for a Connecticut State Tax ID explains how Business Owners obtain a Connecticut Tax Registration Number using Form REG-1 through the myconneCT portal.
This guide covers who must register, the online steps To complete Form REG-1, employer obligations, and where To find official forms and help.
1. Overview of Connecticut REG-1 and State Tax ID
Connecticut requires businesses conducting activities in the state To register with the Department of Revenue Services and obtain a Tax Registration Number.
Form REG-1, the Business Taxes Registration Application, is the central registration method for Sales and Use Tax, Withholding Tax, Room Occupancy, and other state tax accounts.
Who Needs To Register
New businesses that will operate in Connecticut must register before beginning taxable activity.
Out-of-state Businesses establishing a presence in Connecticut must also complete REG-1.
Existing Businesses opening additional locations or adding new tax types must register for the new accounts.
Anyone Purchasing an ongoing business or Reopening a previously closed business must file REG-1 to obtain a new permit and may inherit certain liabilities.
2. How To Register Using Form REG-1
The Connecticut DRS requires all registrations be completed electronically via the myconneCT portal.
REG-1 is submitted online which speeds processing and provides immediate documents for some tax types.
Steps To Register Online
Access the myconneCT portal and select the Business Registration area to begin.
Choose "New Business/Need a CT Registration Number?" to start a new REG-1 application.
Complete Form REG-1 with accurate legal and operational details including business name, address, federal EIN if applicable, and NAICS code or description of activity.
Create your myconneCT username and password during the application for future account access and filings.
Pay any applicable registration fees electronically; direct bank payments are recommended and credit cards are accepted with a convenience fee.
Some registrations such as Sales Tax, Room Occupancy, Over-the-Counter Cigarette Dealer, and Tobacco Products Distributor will generate a temporary permit you can print immediately.
After submission, log into myconneCT to retrieve your Connecticut Tax Registration Number and to access permit documents.
Multiple Locations and Ownership Changes
If your Business operates more than one location in Connecticut you must register each location separately to receive individual Sales and Use Tax Permits.
When Purchasing an existing Business you cannot use the prior owner’s Sales and Use Tax Permit and must obtain a new permit via REG-1.
Buyers should be aware they may be responsible for tax liabilities of the prior owner, so complete registration and due diligence before finalizing a purchase.
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3. Employer Obligations and Other Tax Registrations
Employers with employees working in Connecticut must register for Withholding Tax using REG-1 through myconneCT.
Employers must also register separately with the Connecticut Department of Labor for Unemployment Insurance taxes.
Keep payroll systems updated with your Connecticut Tax Registration Number to ensure accurate withholding and reporting.
Temporary Permits and Record Keeping
Print any temporary permits immediately after completing REG-1 for Sales and Use or Room Occupancy so you have proof of registration on hand.
Maintain copies of submitted REG-1 documentation, confirmation emails, and permit prints for compliance and audit readiness.
4. Common Mistakes To Avoid
Do not attempt To use a previous owner’s Sales and Use Tax Permit when Purchasing an existing Business.
Do not forget To register each physical location separately if you have multiple sites in Connecticut.
Do not delay registering for Withholding Tax if you hire employees, as employer registrations are required immediately when wages are paid.
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5. Quick Reference Table of Accounts and Agencies
| Account Type | Agency | How To Register |
|---|---|---|
| Connecticut Tax Registration Number (REG-1) | Connecticut Department of Revenue Services (DRS) | Complete Form REG-1 electronically in the myconneCT portal |
| Sales and Use Tax Permit | Connecticut Department of Revenue Services | Register via REG-1; print temporary permit immediately for eligible accounts |
| Withholding Tax | Connecticut Department of Revenue Services | Register through REG-1 when you hire employees; manage via myconneCT |
| Unemployment Insurance Tax | Connecticut Department of Labor | Register separately with the Department of Labor for employer UI tax accounts |
| Room Occupancy Permit | Connecticut Department of Revenue Services | Obtain through REG-1; temporary permit available to print after submission |
6. Best Practices For Registration and Compliance
Create your myconneCT account credentials during registration and secure them for ongoing filings.
Use direct account payments when possible to avoid convenience fees on credit card transactions.
Register each location and each tax type separately to prevent permit and filing delays.
Consult an Accountant or Payroll professional if you have questions about liabilities when Purchasing a Business.
Additional Resources For Forms and Help
- Connecticut Department of Revenue Services (DRS)
- myconneCT Portal
- Connecticut Department of Labor
- Form REG-1 Business Taxes Registration Application
- Sales and Use Tax Information
Connecticut REG-1 Form: Conclusion
Filing REG-1 through myconneCT is the required first step for Connecticut Business Owners and Employers who need state tax accounts.
Register early, print temporary permits when provided, register each location separately, and complete Department of Labor registration for unemployment taxes to stay compliant.
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