People often use "resale certificate" and "seller's permit" as if they mean the same thing. They are connected, but they do different jobs.
A seller's permit is a registration with a state. A resale certificate is the document you give a supplier when you are buying qualifying goods for resale.
Informational only. This article is not tax, accounting, or legal advice.
Seller's permit
A seller's permit authorizes a business to collect and remit sales tax in a state. States use different names for similar registrations, including sales tax permit, sales tax license, certificate of authority, certificate of registration, and vendor's license.
You usually look at seller's permit registration when your business has nexus in a state. Nexus can come from physical presence, inventory, employees, or enough sales into the state. For dropshipping context, see dropshipping and sales tax nexus, explained.
Resale certificate
A resale certificate is the document you send to a supplier so the supplier can treat a qualifying inventory purchase as a resale transaction. The supplier generally keeps it on file as support for not charging sales tax.
Most resale certificates ask for a permit or registration number. That is why a business often registers first, then uses that registration information to complete certificates for suppliers.
How they work together
The flow usually looks like this:
- You determine where your business needs to register.
- You register with the state and receive a permit, license, or account number.
- You complete the resale certificate using your business and permit details.
- You give the certificate to the supplier.
- You collect and remit sales tax on taxable sales where required.
The permit is the state registration. The certificate is supplier-facing documentation.
Which one do you need?
Many inventory sellers eventually need both. The seller's permit supports collecting tax from customers. The resale certificate supports buying inventory without sales tax when the purchase qualifies.
There are exceptions and state-specific terms. Some states use a single document or a state-issued reseller permit. Other states do not have a general statewide sales tax, so the usual sales-tax permit and resale-certificate workflow may not apply in the same way.
Common mistakes
- Calling a permit number a resale certificate without completing the supplier's required form.
- Sending a resale certificate before confirming the items are actually for resale.
- Assuming one certificate works in every state.
- Forgetting that vendors can ask for updated or transaction-specific documentation.
Practical takeaway
Think of the seller's permit as your registration with the state and the resale certificate as your paperwork for the vendor. If a supplier asks for a certificate, check whether you also need a valid permit number before you fill it out.