Connecticut Sales Tax Guide 2025: The Newest Regulations

Are you trying to make sense of Connecticut’s complex taxation system? Whether you’re a resident, business owner, or planning a move to the Constitution State, understanding how to comply with Connecticut’s tax requirements can help you avoid headaches and save money. This guide will cover everything you need to know about Connecticut’s state taxes, including sales and excise taxes.

Connecticut Sales Tax

Connecticut sales tax law, introduced in 1947, mandates a 6.35% tax on most retail goods and taxable services. Sales tax in Connecticut includes specific rates for luxury items and accommodations, while Connecticut sales and use tax ensures compliance for out-of-state purchases.

Connecticut Sales Tax Rate

Connecticut has a base sales tax rate of 6.35%, which applies uniformly across the state, as the state does not impose additional local or county sales taxes. Below is a table of the sales tax rates in Connecticut:

Jurisdiction	Sales tax rate
State Tax	6.35%
County Tax	0.00%
City Tax	0.00%
Special Tax	0.00%
Combined Tax	6.35%

For more information on city-based tax rates in Connecticut check out Kintsugi’s City Level Sales Tax Guides.

Connecticut Sales Tax Calculator

Imagine you are selling a television that costs $800 in Connecticut, where the standard sales tax rate is 6.35%. Let’s calculate the total sales tax and the final amount you’ll have to include on your invoice if someone were to purchase it.

Step 1: Understand the Sales Tax Formula

The formula to calculate the sales tax is:

Sales Tax = Item Price × Sales Tax Rate

The total price of the item will then be:

Total Cost = Item Price + Sales Tax

Step 2: Identify the Tax Rate and Item Price

1. Item Price: $800
2. Sales Tax Rate: 6.35% (or 0.0635 in decimal form)

Step 3: Calculate the Sales Tax

Sales Tax = 800 × 0.0635 = 50.80

So, the sales tax on the $800 television is $50.80.

Step 4: Calculate the Total Price

Total Cost = 800 + 50.80 = 850.80

Final Answer:

The total price of the television, including sales tax, is $850.80.

Additional Considerations:

1. Luxury Items: If the item falls into the category of luxury goods (e.g., certain jewelry items costing over $5,000), it may be subject to a higher sales tax rate of 7.75%. Always confirm the applicable tax rate for the item.
2. Exemptions: Items like groceries and prescription medications are exempt from sales tax in Connecticut.
3. Use Tax: If the item is purchased online from an out-of-state retailer without sales tax collection, Connecticut’s use tax may apply at the same rate.

By following this method, you can easily calculate the sales tax and total cost of any item sold in Connecticut.

FAQ for Sales Tax in Connecticut

What is the 7.35% tax in Connecticut?

The 7.35% tax in Connecticut applies to short-term car rentals, luxury items, and specified services, higher than the standard 6.35% rate.

What is the sales tax rate in Connecticut for 2024?

The standard sales tax rate in Connecticut for 2024 remains at 6.35%, with higher rates for luxury and specific items.

How do I calculate CT sales tax​

To calculate Connecticut sales tax, multiply the item’s price by 6.35% (or the applicable rate) and add it to the original price.

Does Connecticut have sales tax?

Yes, Connecticut imposes a sales tax on most retail goods and taxable services, with the standard rate being 6.35%.

Connecticut Sales Tax Nexus

Connecticut has a base sales tax rate of 6.35%, with businesses required to register for sales tax collection if they meet certain thresholds or engage in taxable activities in the state.

Nexus Type	Effective Date	Threshold	Includable Sales (Gross, Retail, or Taxable)	When You Need to Register
Economic Nexus	,December 1, 2018	$100,000 in gross sales or 200 separate transactions annually	Retail sales	Upon meeting the threshold in the of the year in which you cross the threshold on September 30.
Physical Presence	Ongoing	Any physical presence in Connecticut	Retail and Taxable Sales	Immediately upon establishing physical presence (e.g., office, warehouse, or employees).

FAQ on Nexus in Connecticut

What is the sales tax nexus in CT?

Sales tax nexus in Connecticut is established through physical presence (e.g., office, warehouse, or employees) or economic activity, such as exceeding $100,000 in gross sales or 200 transactions annually.

Connecticut Sales Tax Exemptions​

Connecticut provides sales tax exemptions for certain organizations, including nonprofits operating for charitable, educational, or religious purposes, as well as specific goods like groceries and prescription medications. These exemptions are designed to support public benefit activities and essential needs.

Category	Exemption Description
Food	Grocery items intended for off-premises consumption are tax-exempt.
Prescription Drugs	Medications prescribed by licensed professionals are exempt from sales tax.
Nonprofit Organizations	Charitable, religious, and educational nonprofit organizations may qualify for exemptions on qualifying purchases.
Manufacturing Equipment	Machinery and materials used directly in manufacturing are exempt.
Energy	Certain fuels for residential use, such as heating oil, propane, and firewood, are exempt.
Agricultural Products	Items such as seeds, fertilizers, and farming equipment are exempt for qualified agricultural operations.
Government Agencies	Purchases made by federal, state, and local governments are tax-exempt.

FAQ on Taxable Items and Exemptions in Connecticut

How can You Apply for the Connecticut State Tax Exempt Form​?

To apply for a Connecticut state tax exempt form, organizations must complete the required application available on the Connecticut Department of Revenue Services website. Documentation proving nonprofit status, such as IRS determination letters, is typically required.

What Items Are Exempt From Sales Tax in Connecticut?​

Exemptions include unprepared food, prescription medications, certain medical equipment, residential heating fuel, and clothing or footwear under $50. Specific exemptions also apply to agricultural and manufacturing-related purchases.

How can You Apply for the Connecticut Sales Tax Exemption Certificate?

Organizations must submit Form REG-1, along with supporting documentation like proof of nonprofit status, to the Connecticut Department of Revenue Services. Once approved, a certificate is issued for tax-exempt purchases related to the organization’s mission.

Is There Sales Tax on Clothing in Connecticut?

Clothing and footwear priced under $50 are are exempt from sales tax during the Sales Tax Free Week in Connecticut. During this week only items above this threshold are taxed at the standard 6.35% rate unless classified as luxury items, which may incur a higher rate.

What is the Connecticut SAAS Sales Tax?

Connecticut considers software as a service (SaaS) taxable under its sales tax law. Businesses selling SaaS in Connecticut must collect and remit sales tax at the state rate of 6.35%.

Does Connecticut Charge Sales Tax on SAAS?

Yes, SaaS products are subject to Connecticut’s sales tax as they are considered taxable computer and data processing services.

What is the Sales Tax Rate for Software in CT?

The sales tax rate for prewritten software, whether delivered electronically or physically, is 6.35%, consistent with Connecticut's standard rate.

How can You Apply for Connecticut Sales Tax Registration?

Registering for sales tax in Connecticut is essential for businesses engaging in taxable sales or services in the state. The Connecticut Department of Revenue Services (DRS) provides an online platform to simplify the registration process.

1. Determine If You Need to Register: Verify if your business has a physical or economic presence in Connecticut. If you sell taxable goods or services or exceed the nexus threshold ($100,000 in sales or 200 transactions annually), registration is required.
2. Gather the Required Information:
   • Business name and structure (e.g., LLC, sole proprietorship)
   • Federal Employer Identification Number (FEIN) or Social Security Number (SSN)
   • Business address and contact information
   • Description of the goods or services you sell.
3. Visit the Connecticut Department of Revenue Services Website: Go to the DRS Taxpayer Service Center (TSC) and select the option to register for a Connecticut tax account number.
4. Create an Account: If you are a first-time user, create an account by providing your email address and choosing a username and password. Log in to the Taxpayer Service Center once the account is activated.
5. Complete the Registration Form:
   • Type of tax (e.g., sales and use tax)
   • Start date of taxable activities
   • Additional state-specific information, if applicable.
6. Submit the Application: Review the completed application for accuracy and submit it online. If the system requires additional documentation, such as proof of business structure or FEIN, upload the files as prompted.
7. Receive Your Sales Tax Permit: Once approved, you will receive a Connecticut tax registration number and sales tax permit. This number allows you to collect and remit sales tax legally.
8. Start Collecting and Remitting Sales Tax: Begin collecting sales tax on all taxable goods and services you sell. Use the Taxpayer Service Center to file and remit taxes by the assigned due dates.

How Do I get a Connecticut Tax Registration Number?

To obtain a tax registration number, complete Form REG-1 through the Connecticut Department of Revenue Services website. This number allows businesses to collect and remit sales tax.

State of Connecticut Sales Tax Filing​

Connecticut requires businesses to file sales tax returns electronically through the Department of Revenue Services. Filing frequencies depend on sales volume and may be monthly, quarterly, or annually.

How Often Do I File Sales Tax in Connecticut?

Filing frequency is determined by the business’s total taxable sales. High-volume businesses file monthly, medium-volume file quarterly, and low-volume file annually.

How to File Sales Tax in Connecticut 

Sales tax can be filed electronically via the Connecticut Department of Revenue Services Taxpayer Service Center (TSC). Ensure accurate records of taxable and exempt sales for reporting.

Connecticut Sales Tax Due Date​

The due date for sales tax in Connecticut is typically the 20th of the month following the reporting period. Filing frequencies may vary based on the business’s assigned schedule.

Filing Frequency	Due Date
Monthly	20th of the following month
Quarterly	20th of the month following the quarter’s end
Annually	January 20th of the following year

How Often is Connecticut Sales Tax Due?

Connecticut sales tax is due monthly, quarterly, or annually, depending on the business’s total taxable sales volume and assigned filing frequency.

Does Connecticut Have a Sales Tax Holiday?

Yes, Connecticut holds an annual sales tax holiday, typically in August, during which clothing and footwear under $100 are exempt from sales tax to encourage back-to-school shopping.

For More Information

For more information on how to file your sales tax, visit the Connecticut Sales Tax Revenue Service website.