Connecticut: Sales Tax Handbook
How to file your sales taxes in Connecticut
Once your business has a Connecticut sales tax license and begins to make sales, you are required to start collecting sales taxes on behalf of the Connecticut government and filing regular sales tax returns. This page will help you understand the basics of your tax collection and filing responsibilities.
How To Collect Sales Tax In Connecticut
If a seller has an in-state location in the state of Connecticut, they are legally required to collect sales tax at the statewide sales tax rate. No matter where the seller lives, if they have sales tax nexus in the state, they are required to charge Connecticut's flat rate of 6.35%.
Sales Tax Collection Discounts In Connecticut
While many states allow merchants to keep a small percentage of the sales tax they collect as a collection discount, or compensation for the work put in collecting the tax on behalf of the state, Connecticut does not currently allow this.
Your Connecticut Sales Tax Filing Requirements
To file sales tax in Connecticut, you must begin by reporting gross sales for the reporting period, and calculate the total amount of sales tax due from this period.
In the state of Connecticut, all taxpayers are given two options for filing taxes. One is filing online at the Connecticut Department of Revenue Services. the other option is the online service AutoFile. Payment can also be remitted through both of these online systems. You cannot file manually through the mail in Connecticut, as the state requires all tax payers to use the online services.
Tax payers in Connecticut should be aware of late penalties the state applies. The penalty for late filing is fifty dollars, in addition to 1% of the tax imposed for each late month. The late payment penalty is 1% of the unpaid tax per late month, or fraction of a month.
The state of Connecticut requires that a seller who owns a sales tax permit files sales tax return on the required day, even if the tax return would have been "zeroed-out", and there is nothing to report.
Your Connecticut Sales Tax Filing Frequency & Due Dates
Your business's sales tax return must be filed by the 20th day of the month next succeeding each monthly or quarterly period. For a list of this year's actual due dates, see our calendar of Connecticut sales tax filing due dates.
The Connecticut Department of Revenue Services had declared that the implementation of the alteration of the due dates was delayed until 2015. As of October first, 2014, the sales and use tax return due date becomes the twentieth day of the next month. If the tax liability is no more than four thousand dollars for previous year, as provided, the the taxpayer is allowed file on a quarterly basis. If the tax liability one thousand dollars or greater for the previoud year, as provided, the taxpayer is required to file anually. In addition, the commissioner might require any individual who is considered to be delinquent, to remit tax which was collected over the course of a weekly period on a weekly basis
Where To File Your Connecticut Sales Tax Return:
Filing Your Connecticut Sales Tax Returns Online
Connecticut supports electronic filing of sales tax returns, which is often much faster than filing via mail.
Connecticut allows businesses to make sales tax payments electronically via the internet.
Electronic payments are required only if the previous year's liability(ending the prior June 30.) is greater than ten thousand dollars.
You can process your required sales tax filings and payments online using the official Connecticut Taxpayer Service Center website, which can be found here 
. You should have received credentials to access your Connecticut Taxpayer Service Center account when you applied for your Connecticut sales tax license.
Filing Your Connecticut Sales Tax Returns Offline
While it is highly recommended that you file online using the Connecticut Taxpayer Service Center website, it is possible to file your required sales tax reportings offline using Connecticut Form OS-114, which you can download and print here . Once you have completed your required reportings, you can mail it to the state at this address:
PO Box 5030
Hartford, CT 06210-5030
Please note that if you file your Connecticut sales taxes by mail, it may take significantly longer to process your returns and payments.
Simplify Connecticut sales tax compliance! We provide sales tax rate databases for businesses who manage their own sales taxes, and can also connect you with firms that can completely automate the sales tax calculation and filing process. Click here to get more information.
Tax compliance done right
Tired of manually handling sales taxes? Avalara can automate your multi-state sales tax returns, let you know when you've triggered nexus, and more. Request a free demo of Avalara today.
-->
Back to Connecticut Sales Tax Handbook Top