Connecticut Withholding Tax

What is Connecticut Withholding Tax?

Withholding tax is the amount of employee’s pay withheld by the employer and sent directly to the government as partial payment of state income tax.  The amount of withholding tax depends on employee’s income.  The Connecticut state income tax is between 3.0%-6.7%. Therefore, the withholding tax should be similar to the state income tax range.

Employees do not need to take any action.  The employers/businesses will need to deduct the withholding tax from employee’s paycheck and submit and file the withholding tax to Connecticut Dept of Revenue.

How much is Connecticut Withholding Tax?

Since Connecticut withholding tax withheld is used to pay for employee’s Connecticut state income tax, the withholding tax should correlate with state income tax bracket.  The Connecticut state income tax rate ranges from 3.0% to 6.7%.  The withholding tax should be within the state income tax rate range.

State Year  State Income Tax Rate Withholding Tax Rate
Connecticut 2015 3%-6.7% 3%-6.7%

How to File Connecticut Withholding Tax?

Employees do not need to do anything.

Employers/Businesses need to register withholding tax account with Connecticut Department of Revenue.  Depending the size of the company, every three months, the employers have to file a quarterly withholding reports and submit withholding tax to the Department of Revenue.  Most small businesses need to file quarterly while larger businesses need to file more frequently.

Connecticut Withholding Tax Forms

Form Number Form Description
Form CT-W4  Withholding Certificate
Form CT-941  Withholding Tax Return
Form REG-1 Withholding Tax Registration
Connecticut Withholding Tax Forms

How to Register for Connecticut Withholding?

Businesses with employees will need to register for Connecticut Withholding account. The easiest and fastest way to register for Withholding tax is online.

Click here to register for Connecticut Withholding Tax.

When to File and Deadlines for Connecticut Withholding Tax Return

Generally, Connecticut Withholding Tax returns have to be filed every three months, ending on March 31 (Q1), June 30 (Q2), September 30 (Q3) and December 31 (Q4). Typically, the deadline to mail Connecticut Withholding Tax return is the last day of the following month.

Quarter Months Deadline
Q1 January - March April 30
Q2 April - June July 31
Q3 July - September October 31
Q4 October - December January 31

Connecticut CT Withholding Tax Contacts and Address:

For more information or help on Connecticut Withholding Tax, please use the contact information below

Website Connecticut Department of Revenue Services
Telephone 1-860-297-5962 (From Anywhere)
 1-800-382-9463 (Within CT-Outside Greater Hartford area only)
Address Connecticut Department of Revenue Services
25 Sigourney Street Ste 2
Hartford  CT 06106-5032

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