How does Amazon FBA sales tax work in Connecticut in 2026?

For 2026, Amazon collects and remits Connecticut sales tax on your FBA and MFN orders as a marketplace facilitator. You are still responsible for any direct-to-consumer or Shopify sales into Connecticut once those off-Amazon sales cross $100,000 in gross sales OR 200 transactions, and you may need Connecticut registration if FBA inventory is stored in-state.

Does Amazon FBA inventory in Connecticut create physical nexus?

Storing inventory in a state is the classic physical-presence trigger across US states, and it applies regardless of sales volume. Pull your Amazon Inventory Event Detail report and look for CT fulfillment-center activity. Whether Connecticut then requires a registration when a marketplace facilitator already collects on all your Connecticut orders is a per-state rule — some states want the registration for information reporting, others do not — so confirm Connecticut's position with the Connecticut Department of Revenue before you register or skip it.

Does Amazon collect Connecticut sales tax on my FBA orders?

Yes — Amazon is a marketplace facilitator in Connecticut and collects and remits Connecticut sales tax on your FBA and MFN sales automatically.

Do I still need to register in Connecticut as an FBA seller?

If Amazon stores your FBA inventory in Connecticut, you may have physical nexus and need to register for informational filing. Check your Amazon inventory reports for CT distribution.

What about direct-to-consumer sales outside Amazon?

Those are your responsibility. If your Shopify store or website sells into Connecticut above $100,000 in gross sales OR 200 transactions, you register independently.

Connecticut Amazon FBA Sales Tax Guide — 2026

Updated 2026-10-12

Reviewed by Nexus by State research team using official state tax sources. Last reviewed 2026-10-12.

Guide content last reviewed: 2026-08-16

Amazon collecting Connecticut sales tax on your FBA orders does not end your Connecticut obligations. This guide separates the three that remain in 2026 — marketplace collection, your own registration duty, and the physical nexus that FBA inventory stored in Connecticut can create.

Amazon FBA and sales tax in Connecticut

As of July 2026, Amazon FBA sales tax in Connecticut is three separate duties, not one: where Connecticut has a marketplace facilitator law Amazon calculates, collects, and remits the tax on the orders it facilitates; FBA inventory Amazon stores in a Connecticut fulfillment center can create physical nexus on its own; and you still register and file on your direct, non-Amazon sales into Connecticut once they cross $100,000 or 200 transactions.

Connecticut has a marketplace facilitator law, so Amazon calculates, collects, and remits Connecticut sales tax on the FBA and MFN orders it facilitates for you. You do not collect tax on those transactions yourself.

Separately, if Amazon stores your FBA inventory in a Connecticut warehouse, you may have physical nexus — independent of the economic threshold. Whether that alone obliges you to register when a facilitator already remits the tax is a per-state question; several states say yes for information reporting.

The trap is that you don’t choose where your units sit. Amazon’s Inventory Placement Service can distribute one shipment across fulfillment centers in dozens of states, and it can move stock between them without asking you — so FBA inventory can appear in Connecticut even if you never shipped there yourself. To see whether you actually hold units in Connecticut, pull the Inventory Event Detail report (Seller Central → Reports → Fulfillment) and filter for CT fulfillment-center codes; that report, not a guess, is what tells you whether Connecticut physical nexus is in play.

Sources: Streamlined Sales Tax Governing Board (marketplace facilitator collection) and Amazon Seller Central — FBA inventory reports. date_retrieved: 2026-07-28. Whether Connecticut requires a registration when a facilitator already remits is a per-state rule — confirm your position with the Connecticut Department of Revenue before you register or skip it.

When you still need to file in Connecticut

You sell direct-to-consumer from your own store outside Amazon (Shopify, your website) into Connecticut.
You have inventory stored in a Connecticut FBA center (check your Amazon Seller Central inventory reports by state).
You sell wholesale, dropship, or run retail trade shows in Connecticut.
State requires an information return even for marketplace-only sales (rules vary).

Common Amazon-seller mistakes in Connecticut

Assuming marketplace facilitator status covers everything — if Amazon stored your inventory in Connecticut, some states still want a registration on file.
Double-collecting when you sell the same SKU via Amazon AND your own Shopify store. Amazon collects; Shopify collects. Both remit. The buyer pays tax twice. Audit your setup.
Reporting marketplace-facilitated sales on your Connecticut sales tax return as taxable when they should be reported as marketplace-facilitated (non-taxable for you). State form boxes vary.

Connecticut nexus note

Connecticut sales tax nexus and economic nexus threshold: an out-of-state seller must register with the Department of Revenue Services and obtain a Sales and Use Tax Permit when, during the 12-month period ending on September 30 immediately preceding the monthly or quarterly period for which liability is determined, it makes 200 or more retail sales into Connecticut AND has at least $100,000 in gross receipts from sales into Connecticut (Conn. Gen. Stat. § 12-407(a)(12)(G)). Both tests must be met, and the measurement year runs October 1 through September 30 rather than the calendar year. Public Act 19-117 lowered the dollar test from $250,000 to $100,000 effective July 1, 2019. Marketplace facilitators use a separate test: a person that facilitates at least $250,000 of retail sales by marketplace sellers during the prior 12-month period, and DRS guidance OCG-8 says sales to all purchasers, wherever located, count toward that $250,000. Connecticut DRS and Connecticut General Statutes source data last retrieved 2026-10-12.

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.

Amazon sales tax in other states

Compare Connecticut's amazon rules with nearby and similar states' amazon sales tax guides:

Frequently asked questions

How does Amazon FBA sales tax work in Connecticut in 2026?: For 2026, Amazon collects and remits Connecticut sales tax on your FBA and MFN orders as a marketplace facilitator. You are still responsible for any direct-to-consumer or Shopify sales into Connecticut once those off-Amazon sales cross $100,000 in gross sales OR 200 transactions, and you may need Connecticut registration if FBA inventory is stored in-state.
Does Amazon FBA inventory in Connecticut create physical nexus?: Storing inventory in a state is the classic physical-presence trigger across US states, and it applies regardless of sales volume. Pull your Amazon Inventory Event Detail report and look for CT fulfillment-center activity. Whether Connecticut then requires a registration when a marketplace facilitator already collects on all your Connecticut orders is a per-state rule — some states want the registration for information reporting, others do not — so confirm Connecticut's position with the Connecticut Department of Revenue before you register or skip it.
Does Amazon collect Connecticut sales tax on my FBA orders?: Yes — Amazon is a marketplace facilitator in Connecticut and collects and remits Connecticut sales tax on your FBA and MFN sales automatically.
Do I still need to register in Connecticut as an FBA seller?: If Amazon stores your FBA inventory in Connecticut, you may have physical nexus and need to register for informational filing. Check your Amazon inventory reports for CT distribution.
What about direct-to-consumer sales outside Amazon?: Those are your responsibility. If your Shopify store or website sells into Connecticut above $100,000 in gross sales OR 200 transactions, you register independently.

Sources

date_retrieved: 2026-10-12