What is Connecticut's e-commerce sales tax in 2026?

Connecticut's 2026 e-commerce sales tax: out-of-state sellers collect once they cross $100,000 in gross sales OR 200 transactions in Connecticut-destination revenue. As a remote seller, charge the 6.35% state rate plus any applicable local rate at the buyer's ship-to address.

Do I collect sales tax on every Connecticut order?

You collect Connecticut sales tax once you cross the economic nexus threshold ($100,000 in gross sales OR 200 transactions). Below threshold, you don't need to collect unless you have physical nexus (office, employees, inventory in Connecticut).

What rate do I charge for Connecticut e-commerce sales?

For sales shipped into Connecticut from out of state, charge the 6.35% state rate plus any applicable local rate at the buyer's ship-to address. Most e-commerce platforms (Shopify, WooCommerce) can apply destination rates automatically when you enable CT in tax settings. Sales that both begin and end inside Connecticut can follow a different sourcing rule in a minority of states — check with the Connecticut Department of Revenue if you are an in-state seller.

Do I need to collect sales tax on shipping in Connecticut?

It depends on state-specific rules. Many states tax shipping when the product is taxable; some states exempt shipping if separately stated. Check Connecticut's specific policy or use a tax service that encodes the rule.

Connecticut E-commerce Sales Tax Nexus Guide — 2026

Updated 2026-07-20

Reviewed by Nexus by State research team using official state tax sources. Last reviewed 2026-07-20.

Guide content last reviewed: 2026-07-20

If your E-commerce business sells $100,000 or 200 transactions into Connecticut in a calendar year, you have economic nexus and must register, collect, and remit Connecticut sales tax.

E-commerce sales tax basics in Connecticut

For a direct-to-consumer store (Shopify, WooCommerce, BigCommerce, or custom) shipping to Connecticut buyers, the economic nexus trigger is $100,000 or 200 transactions in CT-destination revenue (effective 2019-07-01). Crossing that bar obligates registration, collection, and periodic filing.

Once registered, charge 6.35% state tax on most tangible personal property. Digital products, subscriptions, and professional services have different treatment — see the Connecticut SaaS page if you sell software or digital goods.

Registration + collection checklist

Register with the Connecticut Department of Revenue for a sales tax permit.
Configure your cart platform to collect tax at the destination rate. Enable CT in your tax settings.
As a remote seller, charge the combined state + local rate at the customer's delivery address — interstate sales are sourced to the destination, not to where you ship from.
File returns on the cadence your DOR assigns (monthly, quarterly, or annually).
Track your Connecticut-sourced revenue monthly so you know when you're approaching or below threshold for the next period.

Common mistakes e-commerce sellers make in Connecticut

Using origin-based rates (your HQ state's rate) instead of destination rates. A sale shipped from outside Connecticut into Connecticut is sourced to the buyer's delivery address, so charge the CT rate, not your home state's. Intrastate sales are a separate question: a minority of US states apply origin sourcing to sales that both begin and end in-state, so if your business is located in Connecticut, confirm the intrastate rule with the Connecticut Department of Revenue before configuring your cart.
Guessing at how marketplace sales count toward the Connecticut threshold. States split on this — some let a seller exclude sales a registered marketplace facilitator already collected on, others require those sales to be included in the threshold test even though the marketplace remits the tax. Read Connecticut’s own rule on the Connecticut marketplace facilitator page before adding or removing them from your nexus-tracking spreadsheet.
Waiting until year-end to register. Registration and collection deadlines run from the threshold-crossing date, and the length of that grace period is set by each state — some require collection on the very next transaction, others allow until the first day of a later month. Check Connecticut’s deadline with the DOR as soon as you cross $100,000; back-tax exposure accrues for every day you sell unregistered.
Forgetting to file zero returns once registered. Missing filings trigger penalties even when you owe no tax.

Connecticut nexus note

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.

What to do next

Read the full Connecticut overview for thresholds, filing frequency, marketplace facilitator rules, and registration links. Use the nexus calculator to check whether you have crossed the threshold. For background on the post-Wayfair economic nexus framework, see the pillar guide.

E-commerce sales tax in other states

Compare Connecticut's e-commerce rules with nearby and similar states' e-commerce sales tax guides:

Frequently asked questions

What is Connecticut's e-commerce sales tax in 2026?: Connecticut's 2026 e-commerce sales tax: out-of-state sellers collect once they cross $100,000 in gross sales OR 200 transactions in Connecticut-destination revenue. As a remote seller, charge the 6.35% state rate plus any applicable local rate at the buyer's ship-to address.
Do I collect sales tax on every Connecticut order?: You collect Connecticut sales tax once you cross the economic nexus threshold ($100,000 in gross sales OR 200 transactions). Below threshold, you don't need to collect unless you have physical nexus (office, employees, inventory in Connecticut).
What rate do I charge for Connecticut e-commerce sales?: For sales shipped into Connecticut from out of state, charge the 6.35% state rate plus any applicable local rate at the buyer's ship-to address. Most e-commerce platforms (Shopify, WooCommerce) can apply destination rates automatically when you enable CT in tax settings. Sales that both begin and end inside Connecticut can follow a different sourcing rule in a minority of states — check with the Connecticut Department of Revenue if you are an in-state seller.
Do I need to collect sales tax on shipping in Connecticut?: It depends on state-specific rules. Many states tax shipping when the product is taxable; some states exempt shipping if separately stated. Check Connecticut's specific policy or use a tax service that encodes the rule.

Sources

date_retrieved: 2026-05-31