Amazon generally collects and remits Connecticut sales tax on taxable orders it facilitates through its marketplace. That does not automatically settle your own Connecticut obligations: FBA inventory stored in the state can create a separate registration obligation, and sellers with a Connecticut permit must still file the returns DRS requires, including reporting marketplace sales as directed.
Connecticut’s statewide sales tax rate for most goods and taxable services is 6.35%, with no local sales-tax add-ons. The Connecticut Department of Revenue Services (DRS) administers the tax, and sellers register and manage filings through myconneCT. The details depend on your sales, inventory, and permit status, so verify your position with DRS or have a compliance professional review it.
What Amazon collects and remits in Connecticut
For taxable sales made through Amazon as a marketplace facilitator, Amazon generally calculates, collects, and remits Connecticut sales tax on the marketplace transaction. The tax collected by Amazon is not the same as tax you collect directly from customers through your own website or other channels; you remain responsible for determining whether those sales create a collection obligation.
Marketplace collection also does not necessarily remove your own registration or filing duties. Connecticut DRS says an out-of-state retailer with tangible personal property located in Connecticut on a marketplace facilitator’s premises must register even if it is below the remote-seller sales threshold. If you have a permit, follow the filing instructions DRS assigns and report marketplace sales in the appropriate return fields.
When Connecticut sales tax nexus applies to FBA sellers
For an FBA seller, inventory physically located in Connecticut is an important nexus trigger. DRS specifically states that an out-of-state retailer with tangible personal property in Connecticut on a marketplace facilitator’s premises is required to register, even when the seller does not meet the remote-seller threshold. Amazon’s storage and fulfillment arrangement can therefore matter independently of where your business is based or whether you have made many direct sales to Connecticut customers.
Other activities and sales can also affect whether you must register and collect tax. Do not assume that Amazon’s collection on marketplace orders covers your direct sales, or that having no Connecticut office means you have no obligations. If your inventory location or business activity is unclear, ask DRS or have a compliance professional review the facts before deciding whether to register.
Connecticut’s economic-nexus threshold for remote sellers
DRS describes the remote-seller threshold as both a sales-count and a gross-receipts test: an out-of-state seller must have 200 or more retail sales into Connecticut and at least $100,000 in gross receipts from Connecticut sales during the relevant 12-month period ending September 30 immediately before the monthly or quarterly period being evaluated. Meeting both parts can require registration and collection; reaching only one part does not satisfy the stated combined test.
Inventory in Connecticut on a marketplace facilitator’s premises is a separate registration trigger under DRS guidance, so a seller should not rely on the threshold alone. The threshold calculation and the treatment of particular transactions can depend on the seller’s facts. Confirm the current rule and your calculation with DRS before relying on it.
Do Amazon marketplace sales count toward the threshold?
Do not assume marketplace sales are excluded from the Connecticut economic-nexus calculation. DRS describes the threshold in terms of retail sales and gross receipts into Connecticut, while its guidance separately addresses marketplace-facilitated sales and inventory. The precise treatment of your Amazon transactions should be checked against current DRS instructions and your seller records.
Keep marketplace and non-marketplace sales data distinct so you can reconcile gross receipts, transaction counts, tax collected by Amazon, and any direct sales. If the calculation could affect whether you must register, ask DRS or a compliance professional to confirm how your specific marketplace transactions should be counted.
How to check whether Amazon stored inventory in Connecticut
Review your seller account’s inventory and fulfillment reports for inventory by fulfillment center or state, and examine historical reports as well as current stock. Inventory can move, so a report showing no Connecticut stock today may not establish that none was stored there during an earlier period. Save dated copies of the reports and any relevant account notices.
If your available reports identify a fulfillment-center code but not a state, use Amazon’s seller support or account reporting channels to ask for the location information associated with that code and the dates inventory was held there. Do not guess a state from a code. If you confirm Connecticut inventory, review registration and filing obligations with DRS or a compliance professional.
When and how to register for a Connecticut sales tax permit
Register when your activities require a Connecticut Sales and Use Tax Permit, including when the applicable remote-seller test is met or when DRS’s marketplace-inventory rule applies. DRS directs businesses to register online through myconneCT. Registration is with the Connecticut Department of Revenue Services, not with Amazon, and marketplace collection does not itself register your business.
Before registering, gather your business identity and contact details, ownership information, business activity, and the date your Connecticut obligation began. DRS currently lists a $100 registration fee for sales and use tax registration; check the current DRS registration page for the fee and instructions before submitting. If you are unsure whether your facts require a permit or what start date to use, confirm with DRS rather than choosing a date by guesswork.
What Connecticut filings you still need to complete
If DRS has issued you a sales and use tax filing obligation, you must file the assigned Form OS-114 return through myconneCT for each required period. DRS requires reporting of sales activity, including taxable and nontaxable sales, even when no sales were made or no tax is due. A return may still be required when Amazon collected and remitted tax on marketplace orders.
Use the return instructions to report sales made through a registered marketplace facilitator in the designated manner, and reconcile those amounts to Amazon’s transaction and tax reports. You may also have direct sales or other taxable activity that Amazon did not handle. Keep records supporting the return and follow the filing frequency assigned by DRS; do not stop filing unless DRS confirms that the account or filing requirement has ended.
Connecticut filing frequency and due dates
DRS assigns a monthly, quarterly, or annual filing frequency. The frequency is not something every seller should infer from Amazon sales alone; check your myconneCT account and DRS notices for the schedule assigned to your business. Connecticut’s Form OS-114 is due on or before the last day of the month following the end of the filing period.
For example, a quarterly filer’s return for a quarter is due at the end of the following month. If a due date falls on a weekend or holiday, DRS’s filing-and-payment guidance says the next business day applies. Confirm the exact period and due date shown for your account, and file even for a period with no sales when a return is required.
Penalties for late or missed Connecticut filings
Late filing or payment can lead to penalties and interest, and failing to obtain a required seller’s permit can carry separate civil penalties. Rather than give you a figure that may not apply to you, we would check this against the state’s current guidance for your specific setup — ask us and we will tell you exactly where you stand.
Penalty treatment can depend on the violation and the tax due. The exact position here depends on your own facts, so it is worth confirming with the state directly or talking to us about your situation. Because penalty rules and interest details can vary by circumstance and may change, check current DRS guidance or contact the department promptly if a return or payment is late. Filing an overdue return and addressing the balance can help clarify the next steps.
Get help managing Connecticut sales tax compliance
Sales Tax Compliance USA is a done-for-you service staffed by people, not sales-tax software. We can help review your Connecticut inventory and sales facts, assess registration needs, organize marketplace and direct-sales records, prepare required filings, and track the filing schedule assigned by DRS.
Connecticut’s single statewide rate and lack of local sales-tax add-ons make rate calculation comparatively straightforward, but nexus, marketplace reporting, and filing duties still need attention. Contact us to discuss your business and have a person review the Connecticut compliance steps that apply. For an official determination or current account-specific instructions, confirm directly with the Connecticut Department of Revenue Services.
Not sure how this applies to your business? We handle US sales tax registration, filing and remittance for ecommerce sellers as a fully managed service, for one fee. Book a free consultation and we will review your own position with you.
Connecticut sales-tax rate examples and how the statewide rate structure applies; rates and taxability can vary by item, so verify the current treatment with DRS.
| Sale or transaction type | Connecticut treatment |
|---|---|
| Most retail sales of goods and taxable services | 6.35% statewide rate; no local sales-tax add-on |
| Certain luxury items | A higher 7.75% rate applies to specified items and price categories; check DRS rules for the item |
| Computer and data processing services | DRS lists a 1% rate for this category |
| Vessels, vessel motors, and vessel trailers | This one varies by seller and by state, and it is the kind of detail we check for clients as part of the service — get in touch and we will confirm where you stand. |
| Short-term passenger motor-vehicle rental or lease | DRS lists a 9.35% rate for rentals or leases of 30 consecutive days or less |
| Marketplace sale facilitated by Amazon | Amazon generally collects and remits tax on taxable marketplace orders; seller registration and return duties may still apply |
Frequently asked questions
Does Amazon collect and remit Connecticut sales tax for FBA sellers?
Amazon generally collects and remits Connecticut sales tax on taxable orders it facilitates as a marketplace. That does not necessarily cover your direct sales or remove your own registration and filing duties. Check your account records and DRS requirements for your specific situation.
Does storing inventory in a Connecticut warehouse create sales tax nexus?
Yes, Connecticut DRS says an out-of-state retailer with tangible personal property located in Connecticut on a marketplace facilitator’s premises must register, even if it is below the remote-seller threshold. Confirm the dates and locations of your inventory and review the resulting filing obligations.
Do Connecticut FBA sellers need to register for a sales tax permit?
A seller with inventory in Connecticut on a marketplace facilitator’s premises is required by DRS guidance to register, even if it does not meet the remote-seller threshold. Sellers may also need to register when they meet the applicable remote-seller test or otherwise conduct taxable business in Connecticut. Registration is handled through myconneCT.
What is Connecticut’s economic-nexus threshold for remote sellers?
Both parts of the stated test apply. Inventory in Connecticut can create a separate registration obligation.
Do I still need to file Connecticut sales tax returns if Amazon collects the tax?
If DRS requires you to file Form OS-114, you must file for each assigned period even when Amazon collected and remitted tax on marketplace orders or you had no sales. Report marketplace sales as directed in the return instructions and include any other required sales activity. Check your myconneCT account for your filing schedule.
How can I find out whether Amazon has stored my inventory in Connecticut?
Review current and historical inventory or fulfillment reports in your seller account for state or fulfillment-center location details. If a report shows only a center code, ask Amazon’s seller support to identify its location and the dates your inventory was there. Keep dated records because inventory locations can change.
Do Amazon marketplace sales count toward Connecticut’s economic-nexus threshold?
Do not assume they are excluded: DRS describes the threshold using retail sales and gross receipts into Connecticut, and marketplace sales are addressed separately in its guidance. The treatment of your particular transactions should be confirmed against current DRS instructions. Keep marketplace records separate so the calculation can be reviewed.
How we handle this for you
The mechanics in Connecticut are manageable on their own; the cost is the time it takes every single filing period, in every state you are registered in. We are a managed service: our team registers you with the Connecticut Department of Revenue Services, prepares and files your returns, and keeps you compliant period after period. You get one point of contact and one invoice — you do not get another dashboard to learn.
See our sales tax compliance services, check where you have obligations with the nexus calculator, or talk to us about Connecticut.
Official sources
- https://portal.ct.gov/drs/businesses/new-business-resource-center/registering-with-drs
- https://portal.ct.gov/drs/sales-tax/tax-information
- https://portal.ct.gov/drs/myconnect/filing-and-paying
- https://portal.ct.gov/-/media/drs/forms/2026/sut/o-88_0726.pdf
- https://portal.ct.gov/drs/individuals/individual-income-tax-portal/individual-use-tax/tax-information
Reviewed by Paul le Roux, CA(SA). Sales Tax Compliance USA handles US sales tax registration, filing and remittance for cross-border and domestic ecommerce sellers as a fully managed service.
This page is general information for educational purposes and does not constitute legal or tax advice. Sales tax rules change and depend on your specific facts. Consult a qualified tax professional about your own position.
Related guides
Other Connecticut guides: Economic nexus · Filing · Foreign sellers · Permit · Registration
Amazon FBA in nearby states: New York · Massachusetts
Selling into several states? Check where you have crossed a threshold with the free nexus diagnostic, see the full 51-state threshold table, or browse every state guide.