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You cleaned out the garage, listed a few hundred things on a marketplace app, and made some money. Now the app sends you a Form 1099-K. Does that mean you have a business? Do you owe tax on every dollar?
Usually, no. But you do have to report it the right way, or the IRS computer will assume the worst. And if you crossed the line from decluttering into reselling, the answer changes.
Why you got a form at all
Online marketplaces and payment apps that settle payments for goods and services are third party settlement organizations under IRC Section 6050W. They must report the gross amount of payments for each seller who exceeds the reporting threshold, which is now more than $20,000 and more than 200 transactions in a year under Section 6050W(e).
The platform does not know whether you were selling inventory or your old couch. It just reports the gross. The IRS confirms that Form 1099-K reporting covers payments for goods you sell, including personal items such as clothing or furniture. Sorting out what is taxable is up to you. For more on how the form works, see our Form 1099-K guide.
Personal items sold at a loss: not taxable, not deductible
Most used personal items sell for less than you paid. A couch that cost $1,200 sells for $300. That is a $900 loss.
The loss is not deductible. IRC Section 165(c) limits an individual's deductible losses to losses in a trade or business, losses in a transaction entered into for profit, and certain casualty and theft losses. Selling your own couch is none of those. The IRS states plainly that a loss on the sale of a personal item cannot be deducted.
But the $300 is not income either, because you did not make a profit. You just have to show the IRS that. The IRS offers two ways:
- Schedule 1 (Form 1040), top of the form. Since tax year 2024, Schedule 1 has an entry space above Part I for Form 1099-K amounts that are personal items sold at a loss or payments received in error. IRM 4.19.3.8.7.1 lists that space among the places IRS examiners look for 1099-K amounts.
- Form 8949, carried to Schedule D. The IRS also allows you to report the sale and the nondeductible loss on Form 8949, which flows to Schedule D.
Either way, the 1099-K amount is accounted for, and you do not pay tax on it.
Personal items sold at a gain: taxable
Sometimes your stuff is worth more than you paid. Collectibles, sneakers, tickets, vintage gear. If you sell a personal item for more than you paid for it, the profit is taxable. The IRS says to report the gain on Form 8949 and Schedule D.
Whether the gain is short-term or long-term depends on how long you held the item. Under IRC Section 1222, a gain on a capital asset held for more than one year is long-term, and one held for not more than one year is short-term. Keep in mind that a gain on one personal item cannot be offset by a nondeductible loss on another, because the personal losses are not deductible in the first place.
The platform reports the gross. You report what actually happened. Keep the receipts that prove it.
The real question: is this a business?
Here is where people get into trouble. Selling off your own belongings once is one thing. Buying items at thrift stores, estate sales, or clearance racks so you can resell them for a markup is something else. That is a trade or business, and the IRS will expect it on Schedule C.
When you are in business:
- Your gross sales go on Schedule C, line 1.
- Cost of goods sold, shipping, platform fees, and supplies come off as business costs.
- Your net profit is subject to income tax and, if it is $400 or more, to self-employment tax under IRC 1401 and 1402. See how self-employment tax is calculated.
There is also a middle ground: an activity you do partly for fun and partly for money, like selling your own crafts or flipping the occasional collectible. The tax treatment of an activity not engaged in for profit is different, and it is usually worse than people expect. We explain the factors in hobby or business under Section 183.
A mixed year: personal and business sales on one 1099-K
A lot of sellers have both. They cleared out personal items and also ran a small reselling side business through the same account. The 1099-K lumps it all together.
You split it:
- Pull the platform's transaction history for the year.
- Tag each sale as personal or business.
- Report the business sales as gross receipts on Schedule C.
- Report the personal sales at a loss in the Schedule 1 entry space or on Form 8949, and the personal sales at a gain on Form 8949 and Schedule D.
- Make sure the pieces add back up to the 1099-K total.
That last step is what keeps the matching program quiet. For the business side, our guide on reconciling a 1099-K with Schedule C shows the line-by-line approach.
What records prove a personal loss?
If the IRS asks, you need to show that the item was personal and that you sold it for less than you paid. Good evidence includes:
- Original receipts, order confirmations, or credit card statements showing what you paid.
- Photos of the item in your home, which help show personal use.
- The listing and the sale confirmation showing the sale price.
- For older items with no receipt, a reasonable written estimate of what you paid and when, prepared before you file.
IRC Section 6001 and Treas. Reg. 1.6001-1(a) put the burden of keeping records on you. That applies to the numbers that keep income off your return as much as the numbers that put deductions on it.
Do not ignore the form
The worst approach is to leave the 1099-K off the return entirely because you know you did not make money. The IRS does not know that. It sees a 1099-K and a return with nothing that matches, and it proposes tax on the gross.
If that already happened, respond to the notice with your breakdown and records. Our guide on wrong or missing 1099s covers how to answer a mismatch. Ten minutes of reporting in April saves you a much longer conversation later.
Frequently asked questions
Do I pay tax on a 1099-K for selling my own used stuff?
Not if you sold the items for less than you paid. A loss on a personal item is not taxable income, and it is also not deductible under IRC 165(c). You still report the 1099-K amount, either in the entry space at the top of Schedule 1 or on Form 8949, so the IRS can see why no tax is due.
What if I sold a personal item for more than I paid?
The profit is taxable. The IRS says to report a gain on a personal item on Form 8949 and Schedule D. Under IRC 1222, the gain is long-term if you held the item more than one year and short-term if you held it one year or less.
When does selling stuff online become a business?
When you buy items to resell for a profit, or regularly make and sell goods with a profit motive, you are generally in a trade or business. Those sales belong on Schedule C, with cost of goods sold and expenses deducted, and net profit of $400 or more is subject to self-employment tax.
Can I use a loss on one personal item to offset a gain on another?
No. Losses on personal-use items are not deductible under IRC 165(c), so they cannot offset gains. Each gain on a personal item is reported and taxed, while each loss is simply shown as not taxable.
This guide is general information about federal tax law, not legal advice for your situation. Reading it does not create an attorney-client relationship.