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Connecticut Payroll Tax Filing Requirements

TaxZerone simplifies payroll tax compliance for employers in Connecticut. Stay informed about the state’s filing requirements, key forms, and due dates to ensure smooth and accurate submissions with the Connecticut Department of Revenue Services.

Colorado State Tax Filings

Employers in Connecticut must file both state withholding tax and unemployment insurance (UI) reports to remain compliant with state regulations. Here are the essential forms and deadlines you need to know to ensure your business meets all Connecticut payroll tax filing requirements on time.

Employer Payroll tax forms:

Form NHR

New Hire Reporting

All employers who hire or rehire employees in Connecticut

Within 14 days of the employee’s hire or rehire date.

14 Days

Form CT-941

Connecticut Quarterly Reconciliation of Withholding

All employers who withhold Connecticut income tax

  • Q1: April 30
  • Q2: July 31
  • Q3: October 31
  • Q4: January 31

Information return:

CT Form W-2

Wage and Tax Statement

All employers paying wages subject to Connecticut income tax withholding.

January 31

Form CT-W3

Connecticut Annual Reconciliation of Withholding

All employers who withhold Connecticut income tax

January 31

CT Form 1099-NEC

Nonemployee compensation

Businesses or payers that make payments such as contract work, rent, or interest within Connecticut.

January 31

Connecticut Unemployment Tax (SUI)

In Connecticut, employers are required to pay State Unemployment Insurance (SUI) taxes, which provide financial support to workers who lose their jobs through no fault of their own. The tax amount is based on your business’s experience rate and the state’s annual taxable wage base.

Connecticut UI Tax Rates (2025)
Taxable Wage Base$26,100
Experienced employer rates 1.1% to 8.9%
New employer rate 2.2%

UI Tax Form and Due Dates

Form NameDue Date
Form UC-2/ UC-5AQ1: April 30
Q2: July 31
Q3: October 31
Q4: January 31
How TaxZerone Can Help You?

How does TaxZerone help you file?

TaxZerone supports e-filing for all federal payroll tax forms while providing clear guidance for Connecticut state filings. Stay compliant with state requirements, avoid penalties, and ensure every filing is completed accurately and on time.

Frequently Asked Questions

1. What payroll taxes do employers need to file in Connecticut?

Connecticut employers are required to file both State Income Tax Withholding and State Unemployment Insurance (SUI) taxes. These filings ensure compliance with the Connecticut Department of Revenue Services (DRS) and the Department of Labor (DOL).

2. What forms are required for Connecticut state payroll filings?

Connecticut employers are required to file the forms below with the DRS and DOL.
  • Form CT-941: Employer’s Quarterly Reconciliation of Withholding
  • Form CT-W3: Annual Reconciliation of Withholding
  • Form UC-2: Employer Contribution Report for Unemployment Tax
  • Form UC-5A: Quarterly Earnings Report

3. How do I file and pay Connecticut payroll taxes?

Employers must file electronically through the myconneCT portal for withholding tax and the Connecticut DOL portal for unemployment tax reporting and payments.