A seller’s permit is a state-issued license that authorizes your business to collect sales tax from customers on taxable sales. Every state that imposes a sales tax requires businesses selling tangible goods, and in many cases certain services, to register for one before making their first taxable sale. The permit does two jobs at once: it makes you the state’s tax collector on retail transactions, and it lets you buy inventory from suppliers tax-free by presenting a resale certificate. Five states have no statewide sales tax, so if your business operates exclusively in Alaska, Delaware, Montana, New Hampshire, or Oregon, the permit requirement doesn’t apply to you.
Who Needs One
If you sell tangible goods at retail in any of the 45 states (plus the District of Columbia) that levy a sales tax, you need a permit in each state where you have a tax obligation. That obligation is triggered by what tax professionals call nexus, which just means a sufficient connection between your business and a particular state.
Physical Nexus
This is the straightforward version. You have physical nexus in a state when your business maintains a store, office, warehouse, or employees there. Storing inventory in a third-party fulfillment center counts too, which catches a lot of e-commerce sellers off guard when their products ship from Amazon warehouses in states they’ve never visited.
Economic Nexus
Economic nexus applies to remote sellers who have no physical footprint in a state but sell enough into it to trigger registration. The U.S. Supreme Court authorized this approach in its 2018 decision in South Dakota v. Wayfair, which overruled older precedent requiring physical presence before a state could impose tax collection duties.1Supreme Court of the United States. South Dakota v. Wayfair, Inc. The South Dakota law at issue set the threshold at $100,000 in annual gross sales or 200 separate transactions, and most states initially adopted similar numbers.
The trend has moved toward dropping the transaction count and relying on a dollar threshold alone. As of mid-2025, roughly 15 states have eliminated the 200-transaction test, with Illinois joining them in January 2026. Thresholds still vary, so check each state where you ship.
Wholesalers
Wholesale-only businesses aren’t off the hook. Even if you never sell directly to a consumer, you still need a seller’s permit so you can issue resale certificates to your own suppliers. The certificate tells the supplier that the goods are headed for resale, not end use, so sales tax shouldn’t be charged on that transaction. Tax gets collected once, at the final retail sale.
Service Businesses
Businesses that sell only non-tangible services generally don’t need a permit, though this is one of the murkier areas of sales tax. A growing number of states tax services like software subscriptions, digital downloads, landscaping, or data processing. If you sell services, confirm whether your specific category is taxable in the states where you operate.
Seller’s Permit vs. Resale Certificate vs. Business License
People use these terms interchangeably. They are not the same thing.
A seller’s permit (sometimes called a sales tax license or sales tax permit) is your registration with the state to collect tax. A resale certificate is a document you hand to a supplier to buy inventory tax-free. The seller’s permit is what makes you eligible to issue resale certificates in the first place.
A general business license is a different animal entirely. It’s issued by your city or county and gives you permission to operate at a particular location. It doesn’t involve sales tax at all. Most businesses need both, and you get them from different agencies: the seller’s permit comes from the state’s department of revenue (or equivalent), while the business license comes from city hall or the county clerk.
If You Sell on Amazon, Etsy, or Other Marketplaces
If you sell through Amazon, Etsy, eBay, Walmart Marketplace, or similar platforms, the marketplace itself is almost certainly collecting and remitting sales tax on your behalf. Virtually all states with a sales tax have enacted marketplace facilitator laws that shift collection responsibility from individual sellers to the platform for transactions completed through the marketplace.
That shift has limits. If you also sell through your own website, at craft fairs, or from a physical store, the marketplace isn’t handling those sales. You’re responsible for collecting and remitting tax on every non-marketplace transaction, which means you still need your own permit once you meet nexus thresholds in a state. Some states require marketplace sellers to register regardless of whether the platform handles collection, because the state wants visibility into total sales volume.
Keep clean separation between marketplace sales (where the platform collected tax) and direct sales (where you collected it). Mixing them creates double-taxation problems and audit headaches. Pull the tax remittance reports from each platform’s seller dashboard and store them alongside your own sales records.
How to Apply
Applications are filed with the state agency that administers sales tax, usually called the Department of Revenue, Department of Taxation, or Comptroller’s Office. Nearly every state offers an online registration portal, and you can typically complete the process in a single sitting if you have your documents ready.
What to Have on Hand
- Tax identification numbers. Corporations and multi-member LLCs need their Federal Employer Identification Number (EIN). Sole proprietors and single-member LLCs can use a Social Security Number if they don’t have an EIN.
- Business details, including legal name, any DBA (“doing business as”) names, and the physical address of your primary location. The state mails your permit certificate here.
- Owner information: names, home addresses, Social Security Numbers, and driver’s license numbers for all owners, partners, or corporate officers.
- Estimated monthly or quarterly sales volume. The state uses this to assign your initial filing frequency.
- The specific date you began, or will begin, making taxable sales in that state.
Fees and Deposits
Most states issue the permit at no cost. Some charge a nominal application fee, generally between $5 and $100. The bigger surprise for new applicants is the security deposit. Several states require a refundable deposit or surety bond from new businesses, calculated as a multiple of estimated monthly tax liability. Deposits of a few hundred to several thousand dollars are common for brand-new businesses, and the state typically refunds them after you build a clean filing record.
Processing Times
Some states issue a temporary permit number instantly on submission, letting you start collecting right away. Others take two to four weeks for full verification. Rejections almost always come down to a mismatch in identification details or an incomplete field. If yours is rejected, contact the agency’s business registration unit for the specific fix.
Registering in Multiple States
Businesses that sell into many states face separate applications with each one. The Streamlined Sales Tax Registration System (SSTRS) simplifies this by letting you register in 24 member states through a single free online application.2Streamlined Sales Tax. Sales Tax Registration SSTRS For non-member states like California, New York, and Texas, you’ll still need to register individually through each state’s portal.
Displaying the Permit
Once your certificate arrives, post it where customers can see it. States generally require brick-and-mortar businesses to display the permit conspicuously at the point of sale. If you operate exclusively online, the display requirement is less uniform, but keep the permit accessible in your records for audits and supplier verification.
Filing Returns After You’re Registered
Getting the permit is the easy part. The ongoing obligation is filing sales tax returns on time, every time, for as long as the permit is active.
Filing Frequency
The state assigns your filing schedule based on sales volume. High-volume businesses typically file monthly, mid-range businesses file quarterly, and very small sellers may file annually. If your volume changes significantly, the state can reassign your frequency.
File Zero Returns
This is the part that trips people up. You must file a return even during periods when you collected zero tax. Skipping a filing because you had no sales doesn’t register as “nothing happened” with the state. It registers as a missed return. Penalties for late or missing returns apply regardless of whether any tax was due, and in many states those penalties start at $50 or more per missed return. Some states will eventually cancel your permit after too many consecutive missing filings, which creates a new set of problems when you try to resume selling.
Vendor Discounts
Close to 30 states offer a small reward for filing and paying on time. These vendor discounts (sometimes called collection allowances) let you keep a percentage of the tax you collected, typically between 0.5% and 5% of the amount due, often with a monthly cap. The amounts aren’t life-changing, but they’re free money for doing something you’re already required to do. Some states have recently reduced or eliminated their discounts, so verify your state’s current rule.
Penalties
Late filings carry both penalties and interest. Penalty structures vary, but commonly start at 5% to 10% of the tax due if you’re a few weeks late and escalate from there. Interest accrues on top. Selling without a valid permit at all is a separate and more serious violation that can trigger back-tax assessments for the entire period you should have been collecting, plus penalties, and in some states criminal misdemeanor charges.
Recordkeeping
Keep detailed transaction records for every sale, including the date, amount, tax collected, and whether any exemption or resale certificate was accepted. Records should clearly separate taxable sales from exempt sales. The IRS recommends retaining general tax records for at least three years from the filing date, and up to six or seven years in specific circumstances like substantial underreporting of income or bad-debt deductions.3Internal Revenue Service. Topic No. 305, Recordkeeping State retention periods for sales tax typically run three to four years but can extend longer. When in doubt, keep records for at least four years from the date the return was due or the tax was paid, whichever is later.
Updating, Transferring, or Closing the Permit
A seller’s permit is tied to a specific business entity at a specific address. It cannot be transferred to a new owner. If you sell your business, the buyer must apply for a brand-new permit. The same is true if your structure changes: a sole proprietor who incorporates needs a new permit for the corporation and must close the old sole proprietorship permit.
If you move locations, add a store, or change your legal name, notify the state and update your registration. Some changes require a new permit number; others are simple amendments.
When you stop making taxable sales permanently, close the permit with the state. Don’t just let it sit. An open permit means the state expects returns, and missing returns generate penalties even when a business is dormant. File a final return covering the period through your last day of sales, remit any remaining tax, and formally request closure through the state’s portal or the appropriate closeout form.
Buying an Existing Business
If you’re buying a business rather than starting one, this matters more than almost anything else here. In most states, the buyer of a business can be held liable for the previous owner’s unpaid sales tax, including accumulated penalties and interest. This is called successor liability, and it applies even if you had no idea the seller owed back taxes.
Protect yourself by requesting a tax clearance certificate from the state before closing. The certificate confirms the seller has no outstanding sales tax obligations. Many states require the buyer to notify the tax authority at least 10 to 30 days before the sale closes, and some require the buyer to withhold a portion of the purchase price in escrow until the state confirms the seller is clear. If the seller can’t produce a clearance certificate, that’s a red flag worth pausing the deal over. Inheriting someone else’s tax debt is one of the more expensive surprises in small business acquisitions, and it’s almost entirely preventable with basic due diligence.