Do I Have to Charge Sales Tax When I Resell Items Online?
Someone lists a few used items online, sales start coming in, and a new question shows up that never mattered as a casual seller before — is sales tax supposed to be charged on any of this, and if so, whose job is it to handle it?
The short answer
In most cases, if items are sold through a large online marketplace, the platform itself collects and remits sales tax automatically under what’s known as marketplace facilitator rules, so an individual seller doesn’t have to calculate or add it manually. Selling through a personal website or a platform that doesn’t handle this changes the picture, since the obligation may then fall on the seller directly, depending on the state and the volume of sales involved.
Why the marketplace often handles it already
Most major online marketplaces are required by state law to collect and remit sales tax on behalf of sellers using their platform, which is why many resellers never see a separate tax collection step of their own. This shifted the administrative burden away from individual sellers for a large share of online sales, though it doesn’t eliminate every scenario where a seller might still owe something separately.
When the responsibility can shift back to the seller
- Selling outside a marketplace facilitator. A personal storefront, invoicing a buyer directly, or using a smaller platform without automatic collection can mean the obligation to collect and remit falls on the seller.
- Crossing a state’s economic nexus threshold. States generally set a dollar or transaction threshold that triggers sales tax obligations, and rules vary meaningfully by state, so what applies in one place may not apply in another.
- Selling items classified differently for tax purposes. Some categories of goods are taxed differently or exempted in certain states, which can affect whether tax applies at all.
How this connects to whether selling counts as a business
Sales tax obligations are a separate question from income tax, but they often surface together once selling becomes more than occasional. A marketplace may ask whether sales are for personal or business use partly because that answer affects tax reporting on both fronts. Even casual, small amounts of side income can carry reporting implications that are worth understanding separately from the sales tax question.
What good recordkeeping looks like either way
Regardless of who collects sales tax, keeping records of what was sold, for how much, and to which state matters for anyone selling with any regularity. This becomes especially relevant if original purchase receipts are hard to track down, since cost basis and sales records both factor into an accurate picture of income if the IRS or a state ever asks questions. General guidance on how long to keep tax records applies here too — sales and shipping records are worth holding onto for a few years, not just discarded after a sale closes.
What to weigh
For most casual resellers using a major marketplace, sales tax collection already happens automatically behind the scenes. The picture changes for anyone selling through a personal storefront, crossing a state’s sales threshold, or dealing with specific product categories — and because rules vary by state, checking the specific requirements where sales are happening is the only reliable way to know what, if anything, still needs to be handled directly.