Dropshipping usually contains two sales but only one physical delivery. The online retailer sells to the customer, buys from a supplier, and instructs that supplier to ship directly; registration and documentation determine which party collects or bears tax.
Key takeaways
Map both sales and all three parties before deciding tax responsibility.
The retailer’s nexus and permit status can affect the supplier’s treatment.
Resale certificates must be valid for the relevant jurisdiction and transaction.
Marketplace collection does not automatically resolve supplier documentation.
Diagram the two sales and one shipment
Identify the true retailer, supplier or drop shipper, final customer, bill-to and ship-to locations, product, invoice amounts, delivery path, and permits held by each party.
Do not treat the supplier invoice and customer invoice as one transaction. The first is commonly a purchase for resale; the second is the retail sale, but state drop-shipment rules can shift liability.
- Map contracts and invoices separately.
- Record who sets the customer price.
- Identify who directs shipment.
- Preserve delivery and payment evidence.
Test nexus for retailer and supplier
The online retailer can have physical or economic nexus in the customer’s state. The supplier can have its own nexus through property, inventory, employees, or operations. Analyze each legal entity independently.
A supplier’s in-state presence can trigger special drop-shipment rules when the true retailer is unregistered. California Publication 121 explains circumstances in which the drop shipper reports tax when shipping to a California consumer for an unregistered out-of-state retailer.
- Review both entities’ presence.
- Track destination sales by state.
- Confirm permit status before shipment.
- Version conclusions by effective date.
Collect the correct resale documentation
The retailer normally wants to buy inventory for resale without tax, but the supplier needs acceptable documentation. A home-state resale permit may not be sufficient everywhere; states can accept their own certificate, a multistate form, or specified alternatives.
Validate purchaser name, permit number, state, product scope, signature, date, and good-faith consistency. Link the approved certificate to orders and ship-to states.
- Use jurisdiction-approved forms.
- Reject incomplete or inconsistent certificates.
- Track effective and review dates.
- Retain certificate-to-order links.
Determine customer tax and sourcing
The retailer should test nexus, product taxability, customer exemption, and sourcing for the final sale. The supplier’s warehouse location does not automatically determine the customer’s rate.
Shipping, handling, discounts, and returns still require their own rules. The retailer must ensure the customer invoice and collected tax align with the destination obligation.
- Use the final delivery address.
- Classify the product and charges.
- Apply customer exemptions separately.
- Test refunds and replacements.
Separate marketplace and direct orders
When a marketplace facilitates the customer sale, it may collect and remit tax, but the supplier still needs evidence supporting its resale sale to the merchant. Direct website orders remain the retailer’s responsibility when nexus exists.
Record channel, facilitator, collector, remitter, supplier, and certificate for every order. This prevents double collection and unsupported supplier exemptions.
- Identify the responsible facilitator.
- Keep facilitator tax reports.
- Maintain supplier resale evidence.
- Do not mix marketplace tax with direct liabilities.
Reconcile the full dropship chain
Tie customer orders to supplier purchase orders, shipment confirmations, resale certificates, marketplace reports, tax collected, refunds, and ledger entries. Missing links can create audit exposure even when aggregate totals appear correct.
Review new suppliers and fulfillment locations before launch. A supplier change can alter nexus, documentation acceptance, delivery charges, and operational tax responsibility.
- Match retail and supplier order IDs.
- Reconcile gross sales and purchase costs.
- Investigate tax charged by suppliers.
- Review supplier changes through tax approval.
Frequently asked questions
Who collects sales tax in a dropshipping transaction?
Usually the retailer handles the final customer sale when it has an obligation, but state drop-shipment rules can make an in-state supplier liable when the retailer is unregistered.
Does a resale certificate work in every state?
No. Acceptance and form requirements vary. Confirm the destination state’s permitted documentation.
Does the supplier warehouse determine the customer tax rate?
Not automatically. Final-sale sourcing depends on the jurisdiction and delivery facts.
Does marketplace collection eliminate dropship documentation?
No. The supplier still needs support for the resale transaction, while the retailer needs facilitator evidence for the customer sale.
Official sources
Reviewed against the following primary sources on Aug 8, 2026.