A sales tax account is a registration with a state (and sometimes a local) tax authority that authorizes your business to collect sales tax from customers, report it, and forward it to the government. In the 45 states and the District of Columbia that impose a general sales tax, most businesses selling taxable goods or services have to open one before their first sale. The account gives you an ID number the state uses to track what you collect against what you remit, and it comes with ongoing filing and record-keeping duties.
The state is effectively deputizing you as a tax collector. You charge the applicable rate at checkout, keep that money separate from your revenue, and send it in on a schedule the state assigns. The tax was never yours; most states treat it as funds held in trust. Registration usually produces a permit or certificate (called a Seller’s Permit or Certificate of Authority in some states) that you keep posted where you do business.
When You Need to Register
Two kinds of connection to a state can require you to register: a physical footprint, or enough economic activity. Both matter, and remote sellers tend to underestimate the second one.
Physical Presence
The traditional trigger is a tangible presence in the state. An office, a store, or a warehouse counts. So does an employee working remotely from that state, inventory sitting in a third-party fulfillment center there, and in some states even a sales representative who travels through periodically. If any piece of your operation physically sits inside a state’s borders, you almost certainly have nexus there.
Economic Nexus
The U.S. Supreme Court’s 2018 decision in South Dakota v. Wayfair, Inc. opened the door for states to require collection from sellers with no physical presence based purely on sales volume into the state.1Justia Law. South Dakota v. Wayfair, Inc., 585 U.S. (2018) Every state with a sales tax has since adopted an economic nexus standard. The most common threshold is $100,000 in annual sales delivered into the state, though a few states set it higher. Some states also trigger registration at 200 separate transactions, though roughly half have dropped that transaction count in recent years and now rely on the dollar threshold alone.
If you ship to customers in multiple states, watch your sales volume into each one. Crossing a threshold means you must register there, start collecting on future sales into that state, and begin filing returns. The obligation sneaks up once a state becomes a meaningful share of your revenue.
Selling Through a Marketplace
If you sell exclusively through a major platform like Amazon, Etsy, or Walmart Marketplace, you may not need to register everywhere your products ship. Nearly all sales tax states have marketplace facilitator laws that shift the collection and remittance duty to the platform when it facilitates the sale, processes payment, and exceeds the state’s nexus threshold.2Streamlined Sales Tax. Marketplace Facilitator State Guidance The platform collects tax at checkout and sends it in directly.
That doesn’t always cover you. Sales through your own website or at trade shows aren’t handled by the marketplace. And some states still require marketplace sellers to register and file returns even when the platform handles collection. Check each state’s rules before assuming you’re covered.
States Without a Statewide Sales Tax
Five states impose no general statewide sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. If your business operates only in one of these and ships only to customers there, you won’t need a state-level sales tax account. Alaska is the outlier: some of its local jurisdictions impose their own sales taxes, so businesses in certain Alaska municipalities may still have local collection duties.
How to Register
Most states handle registration through an online portal run by the department of revenue. The application is straightforward, but gather this first:
- Federal Employer Identification Number (EIN). Sole proprietors without employees can often use a Social Security Number instead.
- Legal business name, matching what’s on file with the Secretary of State if you’ve formed an LLC, corporation, or partnership.
- NAICS business classification code, which can affect which tax rates apply.
- Physical business address. A P.O. box usually won’t work; the state wants to know where you operate.
- Names and Social Security numbers for owners, managing members, or responsible parties.
Some states issue a permit number almost immediately through the online system; others take a few business days. Keep the permit posted at your business location once it arrives.
More than 40 states issue sales tax permits for free, including California, Texas, Florida, and New York. A handful charge application fees, typically $10 to $100. A few also require a refundable security deposit or surety bond from certain sellers, particularly remote sellers registering from out of state. If you need to register in many states at once, the Streamlined Sales and Use Tax Agreement offers a single centralized registration that covers 24 participating states.3Streamlined Sales Tax. FAQs – Information About Streamlined
Buying Inventory Tax-Free for Resale
One practical benefit of having a sales tax account is buying inventory for resale without paying tax at the time of purchase. You give your supplier a resale certificate stating that the goods will be resold to end customers, who pay the tax at that point. The certificate includes your registration number, a description of what’s being purchased, and a signed statement that the goods are for resale in the normal course of business.4Multistate Tax Commission. Uniform Sales and Use Tax Resale Certificate
If you accept resale certificates from your own buyers, verify them. Confirm the permit number is active and that the purchase makes sense for the buyer’s business. A landscaping company buying bulk fertilizer for resale is plausible; the same company buying a living room sofa is not. Using a resale certificate for personal purchases is fraud, and penalties range from repayment plus interest to criminal charges.
Filing Returns and Paying What You Collect
Once your account is active, you’re on a filing schedule that doesn’t pause when business is slow. The state assigns a frequency based on volume:
- Monthly filing is typical for higher-volume sellers.
- Quarterly is the most common frequency for small and mid-sized businesses.
- Annual filing is reserved for very low-volume sellers.
Each return reports total sales, taxable sales, exempt sales, tax collected, and any use tax owed. Most states require electronic filing and payment. If you had no sales during a period, you still have to file a zero return. Skipping it because you owe nothing is one of the most common mistakes new sellers make: penalties apply for missing a filing deadline regardless of whether any tax was due.
Use Tax
Sales tax and use tax are two sides of the same coin. Sales tax applies when you buy a taxable item from a seller in your state. Use tax applies when you buy something taxable from outside the state, or from a seller who didn’t charge tax, and then use it in your business. The rate is the same; the buyer pays instead of the seller collecting.
This comes up for businesses that order supplies from out-of-state vendors, buy online from sellers that don’t collect in your state, or pull inventory off the shelf for their own use instead of reselling it. Your sales tax return typically includes a line for use tax, and leaving it blank is one of the most common audit triggers. The state already knows you exist and can compare your reported use tax against what a business your size would reasonably owe.
Penalties, Interest, and Vendor Discounts
Late filing and late payment produce separate consequences that stack. The penalty structure varies by state but follows a common pattern: a percentage of unpaid tax, often 5% to 25% and growing with time, plus a minimum flat penalty that applies even to zero-balance returns. Interest accrues on unpaid tax from the original due date and tends to run in the 5% to 12% annual range.
Chronic non-filing can escalate beyond money. States can revoke or suspend your permit, which shuts down your ability to operate legally. Some states treat willful failure to remit collected sales tax as a criminal offense, since the money belongs to the state and holding it is treated similarly to misappropriating trust funds.
On the other side, close to 30 states let you keep a small percentage of the tax you collect as compensation for acting as the state’s collector. These vendor discounts typically run from 0.25% to 5% of tax due and are only available when you file and pay on time. Miss the deadline and you forfeit the discount for that period.
What Records to Keep
Every sales receipt, exemption certificate, purchase invoice, and filed return belongs in an organized system. Most states require sales tax records for at least three to four years; some set the bar at six or seven. Four years is a reasonable baseline that covers most audit windows. Keep resale certificates you’ve accepted from buyers for the same period, since you’ll need them to justify not collecting tax on those transactions.
Auditors look for consistency between reported gross sales, bank deposits, and the tax you remitted. Gaps draw scrutiny fastest. Point-of-sale or accounting software that tracks tax collected by jurisdiction puts you in a much better position than someone reconstructing records from bank statements after the fact.
Closing or Updating the Account
If you shut down, sell the business, or change its legal structure, formally close your sales tax account with each state where you’re registered. It doesn’t happen automatically. You’ll file a final return covering the period from your last regular filing through your last day of operations, typically within 20 to 30 days of ceasing business. If the state issued a physical certificate, you may need to surrender or destroy it.
Failing to close an account is a common oversight. The state doesn’t know you’ve stopped unless you tell it, so it keeps expecting returns on schedule. Each missed filing generates a penalty, and those pile up quietly. Owners who dissolved an LLC two years ago sometimes discover they owe hundreds of dollars to a state they forgot to notify.
For smaller changes, like a new address, a change in ownership, or an added location, most states let you update the account through the same portal you use to file. Do this promptly. Correspondence goes to the address on file, and missing a notice because it went to your old location is not a defense the state will accept.5Internal Revenue Service. Closing a Business