Why your Amazon 1099-K doesn't match your books (and what to do about it)

Every January, some version of the same message shows up in Amazon seller forums: “My 1099-K says I made $340,000 but my books show $210,000 in revenue. Did Amazon send me the wrong form?”

They didn’t. The form is correct. It’s just not measuring what you think it’s measuring.

What the 1099-K actually reports

Box 1a on Form 1099-K is labelled “Gross amount of payment card/third party network transactions.” The IRS instructions are specific about what that means for a marketplace like Amazon: gross unadjusted payments.

Unadjusted is the load-bearing word. It means the form reports the total amount a buyer paid for an order — full stop — with no netting for refunds, no netting for the fees Amazon deducted before paying you, no netting for anything. If a customer paid $50 for an item and then returned it for a full refund, that $50 still shows up in Box 1a. The refund doesn’t subtract it back out.

So the 1099-K isn’t reporting your revenue. It’s reporting gross transaction volume that flowed through Amazon’s payment system, before a single deduction.

The bridge, line by line

Here’s the actual walk from the 1099-K figure down to net revenue in a proper set of books. Real sellers’ numbers vary, but the shape of this bridge is the same for everyone selling on Amazon.

Start: Gross amount per 1099-K (Box 1a)

This is Amazon’s total for all payment transactions in the tax year — every order, before anything is taken out.

Less: Refunds

Every dollar refunded to a customer during the year. This is usually the single largest adjustment, and it’s the one most sellers intuitively expect to see netted already. It isn’t.

Less: Referral fees

Amazon’s cut of each sale — typically 8–15% depending on category — deducted before you’re paid, but still counted in the gross figure on the form.

Less: FBA fulfilment fees

Pick, pack, and ship fees for FBA orders. Same story: deducted at settlement, still in Box 1a.

Less: Other Amazon fees

Storage, long-term storage, inbound placement fees, and any other fee line Amazon charges against your account. All of these reduce what actually lands in your bank account, none of them reduce Box 1a.

Plus: Sales tax collected (in some states)

Depending on your marketplace facilitator tax setup, Amazon may collect and remit sales tax on your behalf. Whether that flows through Box 1a and needs to be added back or excluded depends on your specific state configuration — this is the line sellers most often get backwards.

Plus: PYOP (Points / Amazon-currency payments)

A small, often-zero line for orders paid partly with Amazon Points or similar. It’s rarely material, but the 1099-K formula includes it, so a correct reconciliation has to account for it even when the number is $0.00.

= Net revenue, as it should appear in your books

If this final number matches what your accounting system shows as revenue for the year, your books and your 1099-K are reconciled — even though the two headline figures look nothing alike.

Why this bites people specifically at tax time

The mismatch isn’t a problem the other eleven months of the year, because nobody’s comparing the two numbers. It becomes a problem in January and February, when a seller (or their accountant) pulls the 1099-K to prepare a return and finds it doesn’t match the P&L that’s been used to run the business all year.

At that point there are two options: trust the books and hope the IRS doesn’t ask why the numbers differ, or spend hours manually reconstructing the bridge from raw Amazon reports — which is exactly the kind of work nobody has time for during filing season.

Neither option is good. The right answer is to have the bridge already documented, so when the question comes up you can answer it in one screen instead of one weekend.

What to actually do about it

1. Pull your 1099-K figure — it’s in Seller Central under Reports, or the physical/digital form Amazon sends.
2. Pull the same-year totals for refunds, referral fees, FBA fees, and other fee categories from your Amazon Payments reports.
3. Walk the bridge above, line by line, and confirm it lands on your books’ revenue figure.
4. Keep the walk-through, not just the final number — if anyone ever asks why your revenue doesn’t equal your 1099-K, you want the answer ready, not a reconstruction project.

That last point is the whole reason this reconciliation is worth doing properly rather than once, from memory, under deadline pressure.

Where SellerTally fits

This bridge is exactly what SellerTally’s 1099-K reconciliation report shows automatically: enter the figures from your form, and it walks gross → refunds → fees → sales tax → PYOP → net revenue, matched against what’s actually in your ledger — month by month as well as for the full year. You’re not rebuilding the bridge from raw reports every January; it’s already there.

If you’re currently doing this reconciliation by hand, or not doing it at all and hoping nobody asks, it’s worth seeing what the automated version looks like before next filing season arrives.