If you sell products or services in Connecticut, you may need to collect sales tax. Businesses with a physical presence in the state or those meeting Connecticut’s economic nexus threshold are generally required to register and collect sales tax. Connecticut also taxes many digital products and certain services, while luxury items are subject to higher tax rates. This guide explains the rules for 2026.
Determining Your Connecticut Sales Tax Nexus
You must collect Connecticut sales tax if your business has physical nexus or economic nexus.
Physical nexus includes:
- Store, office, or warehouse
- Employees or contractors
- Inventory (including Amazon FBA)
- Trade shows or craft fairs
Economic nexus applies if, during the previous 12 months, your business has:
- More than $100,000 in Connecticut sales, or
- 200 or more transactions
If you meet either requirement, register with the Department of Revenue Services (DRS) before making taxable sales.
Connecticut Sales Tax at a Glance (2026)
| Connecticut Sales Tax | Details |
| Standard sales tax rate | 6.35% |
| Luxury tax rate | 7.75% (certain items) |
| Economic nexus | $100,000 in sales or 200 transactions |
| Registration | Connecticut DRS |
| Marketplace sales | Marketplace facilitators generally collect tax |
| Filing frequency | Monthly, quarterly, or annually |
Taxable Products and Services
FConnecticut taxes most tangible personal property, digital products, and many services.
Common taxable items include:
- Clothing
- Electronics
- Downloaded software
- Digital books, music, and movies
- Certain business and computer services
Common exemptions include:
- Most groceries
- Prescription medications
- Sales for resale
- Sales to qualifying non-profit organizations
Connecticut’s Sales and Use Tax Rates
Connecticut’s rate structure is more complex than a single flat percentage. The state applies different rates depending on the type of product or service being sold, and failing to apply the correct rate is a common compliance error.
Standard vs. Luxury Tax Rates
The standard Connecticut sales tax rate is 6.35%.
Some luxury items are taxed at 7.75%, including:
- Motor vehicles over $50,000
- Jewelry over $5,000
- Clothing or footwear over $1,000 per item
If you sell luxury goods, make sure your POS system applies the correct rate automatically.
Registration and Compliance Requirements
Once you’ve established that you have nexus in Connecticut, registration is mandatory before you make your first taxable sale. Operating without a permit can result in penalties and criminal charges in extreme cases.
Getting Started
The registration process is straightforward:
- Visit the DRS’s online Taxpayer Service Center (TSC) at portal.ct.gov/DRS
- Create an account and select “Register a New Business”
- Complete Form REG-1, the Application for Tax Registration Number
- Provide your federal EIN, business structure details, and estimated monthly sales
- Submit the application electronically
Processing typically takes 5 to 10 business days. Once approved, you’ll receive your Connecticut Tax Registration Number, which serves as your sales tax permit. There’s no fee for registration in 2026, though the state has discussed adding nominal fees in the past. Display your registration number at your place of business if you have a physical location.
Pro tip: open a separate bank account or sub-account specifically for collected sales tax. Treating these funds as your own revenue, even temporarily, creates cash flow problems when quarterly payments come due.
Marketplace Facilitator Laws
Marketplace facilitators such as Amazon, Etsy, Walmart Marketplace, and eBay generally collect Connecticut sales tax on marketplace sales.
If you also sell through your own website or at events, you’re responsible for collecting tax on those direct sales.
Filing Procedures and Due Dates
Collecting sales tax is only half the equation. You also need to file returns and remit the collected funds to the DRS on schedule. Connecticut doesn’t give much grace on late filings.
The DRS assigns your filing frequency based on your estimated or actual tax liability:
Monthly filers: businesses collecting more than $4,000 in sales tax per year, with returns due on the last day of the following month
Quarterly filers: businesses collecting between $1,000 and $4,000 annually, with returns due on the last day of the month following each quarter
Annual filers: businesses collecting less than $1,000 per year, with the return due January 31 of the following year
All returns are filed through the DRS Taxpayer Service Center. Even if you collected zero tax during a filing period, you must still file a return showing zero liability. Skipping a “zero return” is treated as a failure to file.
Set calendar reminders at least a week before each due date. The DRS doesn’t send courtesy reminders, and forgetting a deadline is the most preventable compliance failure there is.
Penalties for Late Filing and Non-Compliance
Connecticut’s penalties for late filing and payment are steep enough to get your attention:
- Late filing penalty: 10% of the tax due or $50, whichever is greater
- Late payment penalty: 15% of the unpaid tax
- Interest: accrues at 1% per month on unpaid balances
- Failure to register: up to $500 per offense, and potential criminal misdemeanor charges
The DRS can also revoke your sales tax permit for repeated non-compliance, which effectively shuts down your ability to legally sell in the state. If you’ve fallen behind, contact the DRS proactively. They do offer payment plans, and voluntary disclosure agreements can sometimes reduce penalties for businesses that come forward before being caught.
FAQs
What is the Connecticut sales tax rate?
The standard Connecticut sales tax rate is 6.35%, while certain luxury items are taxed at 7.75%.
Do online sellers need to collect Connecticut sales tax?
Businesses with a physical presence in Connecticut or more than $100,000 in sales or 200 transactions generally must register and collect sales tax.
Do online sellers need to collect Connecticut sales tax?
Yes, remote sellers that meet Connecticut’s economic nexus threshold are generally required to collect and remit sales tax.
Do Amazon and Etsy collect Connecticut sales tax?
Yes, marketplace facilitators such as Amazon and Etsy generally collect and remit Connecticut sales tax on marketplace sales.
What happens if I don’t collect Connecticut sales tax?
You may owe back taxes, penalties, and interest, even if you didn’t collect the tax from your customers.
Final Thoughts
Most businesses with a physical presence in Connecticut or more than $100,000 in annual sales (or 200 transactions) into the state must collect Connecticut sales tax. Register with the DRS, charge the correct tax rate, maintain accurate records, and file your returns on time. If you’re unsure whether the rules apply to your business, professional guidance can help you avoid costly penalties and audits.
Need help with Connecticut sales tax registration or filing? RJM Tax Exemption helps businesses register for sales tax permits, stay compliant with Connecticut filing requirements, and manage ongoing sales tax obligations. Contact us today for expert assistance.
