Connecticut Sales Tax Nexus & Economic Nexus Threshold (2026)
Reviewed by Nexus by State research team using official state tax sources. Last reviewed .
Guide content last reviewed: 2026-06-19; state source data last retrieved: 2026-05-31
Economic nexus triggers at $100,000 or 200 transactions in sales delivered to Connecticut customers.
6.35% statewide sales tax rate. No local general sales-tax add-on is listed in the current source data.
See how Connecticut’s numbers stack up against every other state in our sales tax rates and economic nexus thresholds by state reference table.
| Economic nexus threshold | $100,000 or 200 transactions (whichever is met first, depending on state logic) |
|---|---|
| State sales tax rate | 6.35% No local add-on rates |
| Marketplace facilitator law | Yes Amazon, Etsy, eBay collect and remit on your behalf |
| Effective date | 2019-07-01 |
| Department of Revenue |
Check Connecticut nexus with your numbers
If your sales are close to the Connecticut threshold, run the sales tax nexus calculator with your revenue and transaction count before you register. The calculator applies the same state threshold data shown here and can compare Connecticut against every other state where you sell.
How Connecticut nexus works
Economic nexus in Connecticut requires BOTH more than $100,000 in gross sales AND more than 200 separate transactions delivered into Connecticut in the prior year. Both thresholds must be met.
Filing frequency
Filing frequency in Connecticut depends on your sales tax liability. Higher-volume sellers file monthly; lower-volume sellers typically file quarterly or annually. The state will assign a frequency when you register.
Marketplace facilitator law
Yes, Connecticut has a marketplace facilitator law. Sales you make through Amazon, Etsy, eBay, Walmart, and other marketplaces are collected and remitted by the marketplace — you do not need to collect tax on those transactions yourself, though you may still need to register.
Connecticut sales tax by topic
- Connecticut · E-commerceGeneral e-commerce sales tax rules
- Connecticut · ShopifyShopify-specific sales tax guidance
- Connecticut · AmazonAmazon FBA and marketplace sales tax
- Connecticut · SaaSSoftware-as-a-service sales tax rules
- Connecticut · ThresholdsEconomic and transaction nexus thresholds
- Connecticut · FilingFiling frequency and procedures
- Connecticut · Marketplace FacilitatorMarketplace facilitator law for the state
- Connecticut · DropshippingDropshipping sales tax rules and resale certificates
- Connecticut · Digital ProductsSales tax on digital downloads, eBooks, courses, streaming
Industry-specific sales tax guides
Whether a sale is taxable in Connecticut often depends on what you sell, not just where. These national guides explain how sales tax applies to common business types — then check the Connecticut threshold and rules above to see where you must register and collect.
- Haircut, nail, and salon sales taxWhen haircuts, nail services, and salon retail product sales are taxable.
- Restaurant and food-service sales taxPrepared-food, dine-in, and takeout taxability for restaurants.
- Food delivery sales tax (DoorDash, Uber Eats)Who collects sales tax on DoorDash, Uber Eats, and Grubhub orders.
- Digital creator and online course sales taxSales tax for influencers, course sellers, and digital downloads.
- Construction and contractor sales taxHow contractors handle sales and use tax on materials and labor.
Related states to Connecticut
If you sell into Connecticut, you likely also sell into these nearby or economically similar states. Each has its own nexus threshold and rate.
Frequently asked questions
- Does Connecticut have sales tax?
- Yes. Connecticut has a 6.35% statewide sales tax rate. Check the exact rate at the customer's delivery address before charging. Source data last retrieved 2026-05-31.
- Do I have to collect sales tax in Connecticut?
- You must collect Connecticut sales tax if your economic nexus threshold is met: $100,000 or 200 separate transactions in sales to Connecticut customers.
- What is Connecticut's sales tax rate?
- Connecticut's base state rate is 6.35%. Always check the exact rate at the customer's delivery address before charging.
- Does Connecticut have a marketplace facilitator law?
- Yes. Marketplaces like Amazon, Etsy, and eBay collect and remit Connecticut sales tax on behalf of third-party sellers for transactions they facilitate. Direct-to-consumer sales outside a marketplace are still your responsibility.
- What is Connecticut's marketplace facilitator threshold for sales tax?
- Connecticut applies the same threshold to marketplace facilitators as to remote sellers: $100,000 or 200 separate transactions in Connecticut sales over the lookback period. When a marketplace exceeds the threshold, it must register and collect Connecticut sales tax on every facilitated sale — sellers do not collect on those marketplace transactions. Direct-to-consumer sales you make outside any marketplace still count toward your own economic nexus and remain your collection responsibility once you cross the threshold.
- When did Connecticut's economic nexus law take effect?
- Connecticut's current economic nexus rule took effect on 2019-07-01.
Sources
date_retrieved: 2026-05-31. See how we verify source checks in our Methodology & Sources.