If you’re trying to figure out the difference between a wholesale license and a sales tax permit, the short version is that they’re usually the same thing under different names. What people call a “wholesale license” is almost always a state-issued sales tax permit. That single document does two jobs: it authorizes you to collect sales tax from your customers, and it lets you buy inventory from suppliers tax-free when you plan to resell it. Forty-five states and the District of Columbia require this registration before you can do either.1Supreme Court of the United States. South Dakota v. Wayfair, Inc.
The Documents People Confuse
The vocabulary is the source of most of the confusion. Depending on the state, the sales tax permit goes by seller’s permit, certificate of authority, transaction privilege license, or retail license. Different label, same document: it registers your business with the state’s revenue department and puts you inside the sales tax system.
A resale certificate is not the same thing. It’s a form you hand to your supplier to document that a specific purchase is for resale rather than personal use. The certificate references your sales tax permit number as proof that you’re a registered seller. You can’t have one without the other. The permit comes first, and the resale certificate flows from it.
A general business license is a third, separate item. Many cities and counties require one to operate within their jurisdiction. That license gives you permission to conduct business in a locality; the sales tax permit governs your state tax obligations. You may need both, but they come from different agencies and answer different questions.
Who Actually Needs to Register
If you sell tangible goods in a state that imposes sales tax, you need that state’s permit. It doesn’t matter whether you’re a sole proprietor, an LLC, or a corporation. The trigger is the act of selling, not the size of your business. Even a small volume of taxable sales creates a registration obligation.
Five states don’t impose a general sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. A business operating only within one of those states, with no sales into other states, doesn’t need a sales tax permit at all. But if you ship into states that do charge sales tax, you’ll likely need to register in those states once your activity there crosses a threshold.
One thing the permit is not for: buying personal items tax-free. The registration exists so you can collect tax from customers and purchase inventory for resale. Using a resale certificate to skip tax on items you plan to keep is fraud, and state revenue departments audit for it. Consequences range from back taxes and interest to civil penalties, and in serious cases, criminal charges.
When You Need Permits in Other States
Your obligation to register in a particular state turns on whether you have “nexus” there. Before 2018, nexus meant physical presence: a storefront, warehouse, employees, or inventory sitting in the state. The Supreme Court changed that in South Dakota v. Wayfair, holding that states can require out-of-state sellers to collect sales tax based on economic activity alone.1Supreme Court of the United States. South Dakota v. Wayfair, Inc.
South Dakota’s threshold, $100,000 in sales or 200 separate transactions delivered into the state annually, became the template. Every state with a sales tax has since adopted some version of economic nexus. Roughly 24 states use $100,000 in annual sales as a standalone threshold. About 16 states and the District of Columbia still include an alternative transaction count, typically 200 transactions. A few states set the bar higher at $250,000 or $500,000, but those are exceptions.
Once you cross a state’s threshold, you have to register, collect tax on sales delivered there, and file returns. State revenue departments track these thresholds and can impose back taxes, interest, and penalties on sellers who should have registered and didn’t.
If You Sell Through Amazon, eBay, or Etsy
Selling through a marketplace changes the picture. Amazon, eBay, Etsy, Walmart Marketplace, and similar platforms collect and remit sales tax on your behalf in nearly every state, because almost all states with a sales tax have passed marketplace facilitator laws that shift the collection responsibility onto the platform.
For orders that flow through the marketplace, the platform calculates, collects, and sends the tax. You still need your own sales tax permit for anything sold outside the marketplace: your own website, trade shows, a physical location. And in some states, you’re expected to report marketplace sales on your own returns even when the platform paid the tax (the return just shows zero due on those transactions). Check your state’s specific rules before assuming you can skip a filing.
How to Register
Most states let you register online through their department of revenue. The application typically asks for:
- Your Federal Employer Identification Number (EIN), or your Social Security Number if you’re a sole proprietor without employees. The IRS issues EINs at no cost.2Internal Revenue Service. Get an Employer Identification Number
- Business details: legal name, entity type, physical address, and any additional locations.
- A NAICS code, which is the six-digit classification identifying your primary business activity.
- Expected sales volume, which determines whether you file monthly, quarterly, or annually.
Online applications in many states produce a permit number within 24 hours. Paper applications take weeks. Keep the confirmation. You’ll use that permit number every time you fill out a resale certificate for a supplier.
Most states charge nothing to register. Where fees exist, they generally sit between $10 and $100. A few states also require a refundable deposit or surety bond, particularly for new businesses or remote sellers. Colorado, for example, requires a $50 deposit. The registration itself is rarely the expensive part; ongoing compliance across multiple states is where the real cost sits.
If you’ll need permits in several states at once, the Streamlined Sales Tax Registration System lets you file a single application covering all 24 member states of the Streamlined Sales and Use Tax Agreement.3Streamlined Sales Tax. Registration FAQ You can pick specific states or register in all of them. Member states include Arkansas, Georgia, Indiana, Iowa, Kansas, Kentucky, Michigan, Minnesota, Nebraska, Nevada, New Jersey, North Carolina, North Dakota, Ohio, Oklahoma, Rhode Island, South Dakota, Tennessee, Utah, Vermont, Washington, West Virginia, Wisconsin, and Wyoming.4Streamlined Sales Tax. Streamlined Sales Tax For any state outside the agreement, you register directly with that state’s revenue department.
Using the Permit to Buy Inventory Tax-Free
Once you have your permit, you buy inventory tax-free by giving your supplier a resale certificate. The certificate tells the supplier not to charge tax because the goods are for resale.5Multistate Tax Commission. Uniform Sales and Use Tax Resale Certificate – Multijurisdiction
Resale certificates are almost always issued in “blanket” form, meaning one certificate covers all future purchases from that particular supplier. You fill it out once, the supplier keeps it on file, and later orders proceed tax-free without new paperwork each time. The certificate needs your business name and address, your sales tax permit number, a description of the goods, a statement that the purchase is for resale, the date, and your signature.
If you buy from suppliers in multiple states, two standardized forms save you from filling out a different state-specific certificate for every vendor. The Multistate Tax Commission’s Uniform Sales and Use Tax Resale Certificate works across most jurisdictions.5Multistate Tax Commission. Uniform Sales and Use Tax Resale Certificate – Multijurisdiction The Streamlined Sales Tax Certificate of Exemption covers the 24 member states of that agreement.6Streamlined Sales Tax. Streamlined Sales Tax Certificate of Exemption Either one avoids tracking down each state’s proprietary form.
The Use Tax Trap
Here’s where new businesses most often get themselves into trouble. When you buy goods tax-free with a resale certificate and then use them yourself instead of reselling them, you owe use tax on those items. Pulling inventory off your shelves for the office, letting employees take home samples, giving away merchandise at an event: each one converts a tax-free resale purchase into taxable consumption.
Use tax is the mirror of sales tax, charged at the same rate. Nobody sends you a bill. You self-report it on your regular sales tax return, based on what you paid for the goods. The uniform resale certificate spells this out: the buyer certifies that if any goods purchased tax-free are later used or consumed, the buyer will pay the tax due directly to the taxing authority.5Multistate Tax Commission. Uniform Sales and Use Tax Resale Certificate – Multijurisdiction
Auditors look for exactly this gap. If your tax-free purchases are consistently high relative to your reported sales, someone will notice. The difference represents either unreported use tax or unreported sales, and neither answer ends well. Track internal use as it happens rather than trying to reconstruct it later.
Keeping the Permit Active
A sales tax permit comes with a standing obligation to file returns on whatever schedule the state assigns, monthly, quarterly, or annually. The single rule new businesses miss most often: you must file even in periods when you had zero sales. Skipping a return because you had nothing to report can trigger late-filing penalties, automatic permit suspension, or audit flags.
Late-filing penalties vary. Flat fees often apply regardless of whether tax was owed. When you owe tax and pay late, percentage-based penalties of 5% to 25% of the unpaid amount are common, plus interest running from the original due date.
Some states issue permits that stay active indefinitely as long as you file and keep your information current. Others require periodic renewal. Either way, notify the revenue department promptly when your business changes address, adds locations, or changes ownership. An outdated registration can lead to suspension.
If you close the business or stop selling in a particular state, formally close the account. An open permit with no filings generates delinquency notices and penalties even when you owe nothing. Closing takes minutes and saves months of cleanup.