Connecticut Sales Tax: Rates, Rules, and How to Calculate It (2026)
Connecticut keeps sales tax simple: one uniform 6.35% rate applies everywhere in the state, with no local add-ons. This makes it straightforward to calculate tax on purchases across the entire state. No matter where you are in Connecticut, you can count on that single rate.
| Statewide base rate | 6.35% |
|---|---|
| Typical combined rate | 6.35%–6.35% |
| Are groceries taxed? | Exempt |
| Economic nexus threshold | ≈$100,000/yr (verify) |
| Taxing jurisdictions tracked | 443 |
| Get the exact rate | Look up any Connecticut ZIP or address instantly |
How much is sales tax in Connecticut?
Connecticut charges a flat 6.35% sales tax rate across the entire state. There's no variation by city or county—the rate is the same in Hartford, Stamford, or any town in between. With 443 taxing jurisdictions listed, each handles its own administration, but they all apply the identical 6.35% rate.
Because there's only one rate in Connecticut, you don't need to look up the rate by address. You can calculate tax with confidence knowing 6.35% applies everywhere. However, it's still good practice to verify that the product or service itself is taxable in Connecticut before finalizing your numbers.
What's taxed and what's exempt in Connecticut
Groceries are not taxed in Connecticut, which is beneficial for routine shopping. Clothing purchases are subject to the full 6.35% tax. It's worth knowing the distinction so you can estimate your total spend accurately when buying mixed baskets of groceries and apparel.
SaaS and digital software are taxable in Connecticut at the 6.35% rate. Prescription medicines are exempt, which helps keep essential healthcare costs down. Restaurant meals and prepared foods are generally taxed, so it's wise to factor that into your dining budget.
Do you have to collect Connecticut sales tax? (Economic nexus)
Like most states after the 2018 Wayfair decision, Connecticut requires out-of-state sellers to register and collect once their sales into the state cross an economic-nexus threshold. That line is commonly around $100,000 of sales into Connecticut per year, and some states also count a number of separate transactions — but the exact figure, and whether the transaction count still applies, change from time to time. Confirm Connecticut's current threshold before you rely on it.
If you sell into Connecticut from out of state, the practical question is whether you've crossed that line. Watching your sales into each state is how you know when you're on the hook — and it's the kind of thing that's easy to miss until a notice shows up.
Nexus rules change often and vary by state (reviewed 2026-01-01). This is general information, not tax advice — confirm your obligations with the Connecticut Department of Revenue or a tax professional.
How to calculate Connecticut sales tax
The math itself is simple: multiply the taxable price by the combined rate for the buyer's location. A $100 order at 6.35% means about $6.35 in tax. The hard part is getting the right rate for every address, keeping it current as rates change, and doing it fast enough to run inside a checkout.
That's what Sefro does. One API call returns the combined state, county, city, and special-district rate for any US address, sourced from state Departments of Revenue and refreshed weekly. You can also calculate the full tax on an order, validate addresses, and pull return-ready reports. See how the data is sourced or pricing to start.
Look up the Connecticut sales tax rate for any ZIP
Enter a Connecticut ZIP code to see the live combined rate from the Sefro API.
Frequently asked questions
What is the sales tax rate in Connecticut?
Connecticut's sales tax rate is 6.35%, and it's uniform across the entire state. There are no local add-ons or variations by city or county—it's the same rate everywhere.
Are groceries taxed in Connecticut?
No, groceries are exempt from sales tax in Connecticut. This exemption helps reduce the cost of everyday food purchases for all residents.
Do I have to collect Connecticut sales tax if I sell online?
Once your sales into Connecticut cross its economic-nexus threshold — commonly around $100,000 a year, sometimes with a transaction count — you generally must register and collect. Because states adjust these rules, check Connecticut's current figure before relying on it.
How do I find the exact rate for a Connecticut address?
Since Connecticut has just one statewide rate of 6.35%, you don't need to look up by ZIP or address. However, using Sefro's API with a full address ensures you capture any other local rules that might apply to your specific product or service.
Is SaaS or digital software taxable in Connecticut?
Yes, SaaS and digital software are taxable in Connecticut at 6.35%. This applies to software subscriptions, licenses, and other digital products sold to Connecticut customers.
Does Connecticut have local sales taxes on top of the state rate?
No, Connecticut does not have local sales taxes on top of the state rate. The 6.35% rate is uniform statewide, and no city, town, or county adds additional sales tax.
Handle Connecticut sales tax with one API call
Skip the rate tables and district lookups. Sefro returns the exact combined rate for any Connecticut address in one request — start with a free trial.
Rates and rules on this page are provided for general information only and are not tax or legal advice. Rates change; confirm the current rate and your filing obligations with the Connecticut Department of Revenue or a qualified professional. See our Terms.