To sign up for Square Payroll in Connecticut, you must be registered with the Connecticut Department of Revenue Services and the Connecticut Department of Labor.

Agency Tax ID Tax ID Format
Connecticut Department of Revenue Services Connecticut Tax Registration Number (X)XXXXXXX XXX (typically 8 digits with a 3 digit location code)
Connecticut Department of Labor Connecticut Department of Labor Employer Registration Number XX-XXX-XX (7 digits)

Connecticut New Employer Registration

Connecticut Department of Revenue Services

  1. Register online.
  2. Allow approximately 10 business days to receive your Connecticut Tax Registration Number.
  3. If you need to speak with the Department of Revenue Services, call: 860-297-5962

Connecticut Department of Labor

  1. Register online.
  2. Upon successful completion of online registration, you will receive your Department of Labor Employer Registration Number.
  3. If you have issues, call the Department of Labor: 860-263-6000

Connecticut Contribution Rate

  1. The default unemployment contribution tax rate for new employers is 4.3%.
  2. Your rate is the sum of the Employer Tax Rate and the Connecticut Fund Solvency Tax Rate.

Find Your Connecticut Tax ID Numbers and Rate

Connecticut Tax Registration Number

  1. Locate your eleven-digit (XXXXXXXX XXX) registration number on any previously filed state tax return (Form CT-941) or correspondence from CT Department of Revenue Services. (Note: If your Tax Registration Number is 10 digits long, please add a leading 0 when entering in your number [0XXXXXXX].)
  2. Call the Department of Revenue Services: 860-297-5962

Connecticut Department of Labor Employer Registration Number

  1. Locate your seven-digit (XX-XXX-XXX) registration number on any previously filed quarterly report (Form UC-5A / UC-2R) or correspondence from the Department of Labor.
  2. If you can’t find your locate your Department of Labor Employer Registration Number, you may fax a request to the Employer Status Unit at (860) 263-6567. See specific fax requirements here.
  3. If you have issues, call the Department of Labor: 860-263-6000

Connecticut Contribution Rate

  1. Your rate is the sum of the Employer Tax Rate and the Connecticut Fund Solvency Tax Rate.
  2. If you have an online account, look up your rate online.
  3. Locate your rate on any previously filed quarterly report (Form UC-5A/UC-2R) or on the Merit Rating Notice that the CT Department of Labor mails each December.
  4. Call the Department of Labor: 860-263-6000

You are responsible for ensuring Square Payroll has the correct tax ID numbers and tax rates for your business. Please contact us if you need to update your rate.

Connecticut State Tax Details

Square Payroll processes the following per the frequency below to the listed state agencies:

Agency Name Frequency
Department of Revenue Services Withholding Tax Payment Per Pay Run
Quarterly Reconciliation of Withholding (CT-941) Quarterly
Annual Reconciliation of Withholding (CT-W3) Annually
Annual Wage and Tax Statements (CT-W2) Annually
Department of Labor Employer Contribution Return and Employee Quarterly Earnings Report (UC-5A / UC-2) Quarterly
Unemployment Insurance Tax Payment Quarterly
New Hire Report Per New Employee

Additional Connecticut Specific Information

  • Connecticut Tax Registration Number: Your Connecticut Tax Registration Number may be either 10 or 11 digits. If your Tax Registration Number is 10 digits long, please add a leading 0 when entering in your number (0XXXXXXX).

Learn how to locate or obtain an EIN.

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