If you sell on eBay, tax season gets a lot less stressful when your records are clean before you sit down to file.

This article is not tax advice. BinFlip does not provide tax, legal, or accounting advice, and we're not telling you how you should file. This is just a practical summary of the things we've learned that help eBay sellers get organized for filing season. Your situation can change based on your state, entity type, inventory method, and whether you're selling casually or operating as a business. When in doubt, talk to a CPA or other qualified tax professional.

The Biggest Thing We've Learned: Your 1099-K Is Not Your Profit

One of the easiest mistakes to make as an eBay seller is seeing a big gross sales number and assuming that's close to taxable profit.

It usually isn't.

The IRS says Form 1099-K reports gross payment amounts. eBay also says the number can include amounts before adjustments like fees, refunds, discounts, and some other offsets. That means the number on your form can be much higher than what you actually kept.

That's why the real tax work starts with your records, not with the 1099-K by itself.

What We Think Sellers Should Have Ready Before Filing

Again, this is not a filing instruction list from a tax professional. It's just the checklist we've found most helpful to prepare before talking to one or filing with software.

Try to have:

  1. your eBay gross sales totals for the year
  2. your Form 1099-K, if you received one
  3. your cost of goods sold or inventory purchase records
  4. your eBay fees and promoted listing fees
  5. your shipping label costs
  6. your packing supply expenses
  7. your mileage or sourcing-trip records, if applicable
  8. your software, subscription, storage, and other overhead expenses
  9. copies of receipts, invoices, statements, and other backup documents

We've learned that filing gets much easier when each number has support behind it. A total without receipts or transaction history is hard to trust later.

What Happens With the 1099-K in 2026

As of April 11, 2026, eBay says it will issue a Form 1099-K for 2025 sales if you had more than $20,000 in gross payments and more than 200 transactions, if withholding applied, or if your state has a lower reporting threshold.

The IRS also says the older federal threshold was reinstated, which means online marketplaces generally are not required to issue Form 1099-K unless payments exceed $20,000 and 200 transactions.

But the part that matters most is this: not receiving a 1099-K does not mean you have no tax reporting obligation. If your selling activity produced taxable income, the filing obligation doesn't disappear just because a form didn't show up.

What We've Learned About Expense Tracking

Most reseller tax stress comes from missing expenses, not just missing sales.

Here are some of the categories sellers often forget to total up:

When those don't get tracked, profit gets overstated fast.

We've also learned that it's much easier to file when every sold item can be tied back to what you originally paid for it. That cost basis is where a lot of spreadsheet systems start falling apart.

Estimated Taxes Are Worth Paying Attention To

If you're operating like a business and expecting to owe taxes, estimated payments may matter too.

The IRS says individuals generally may need to make estimated payments if they expect to owe at least $1,000 when they file. For the 2026 tax year, the standard due dates are:

We mention this because we've learned that sellers can get surprised when they wait until filing season to look at profit for the first time. Even if you work with a pro, clean year-round tracking makes those conversations much easier.

Questions We Think Are Worth Asking Your Tax Professional

If you're hiring a CPA or tax preparer, we've learned it helps to come in with specific questions instead of just handing over a pile of totals.

Some useful ones:

That last question matters a lot. The IRS puts a big emphasis on recordkeeping, and good filing starts with good records.

Our Simple Takeaway

The filing part is easier when the year is organized before tax season starts.

What we've learned is pretty simple:

BinFlip does not provide tax advice, and this article should not be treated as tax advice. But from our perspective, eBay sellers who consistently track purchases, fees, shipping, and overhead usually have a much easier time when it's time to file.

If you want a cleaner way to keep those records organized all year, BinFlip helps eBay sellers track inventory, expenses, and real profit. You can also read our guide on eBay seller taxes in 2026 and why expense tracking matters and our walkthrough on how to track your eBay reselling profits.