← Back to the 1099-K reconciliation worksheet
Every filing season, resellers and gig-marketplace sellers open a Form 1099-K and don't recognize the number in Box 1a — it's often thousands of dollars more than what actually landed in their bank account after fees, refunds, and taxes. That gap is not a mistake on the form. It's how Box 1a is defined.
The IRS's own General Instructions for Forms 1099-K describe Box 1a as the gross amount of reportable payment-card and third-party network transactions for the year — reported "without regard to any adjustments for credits, cash equivalents, discounts, fees, refunds, or other amounts." In plain terms: it's the total dollar value of what moved through the platform's payment system tied to your account, before anything is subtracted.
Sales tax the marketplace collected and remitted for you. Under marketplace-facilitator laws now in effect everywhere that levies sales tax, a large marketplace calculates, collects, and pays over sales tax on a seller's behalf automatically — the seller never sees that money and has no filing obligation for it. But the tax is still part of what the buyer paid, so it commonly counts toward Box 1a's gross total anyway.
Refunds. Because Box 1a is defined without regard to refunds, a sale you later refunded in full can still be counted in the gross figure, even though the buyer got their money back.
Neither of these is your income. Both need to be backed out before the number means anything about what you actually made.
The 1099-K reconciliation worksheet does exactly this arithmetic — for one platform or several at once — and exports the result as a CSV you can hand to whoever prepares your return.
The IRS's own General Instructions for Forms 1099-K define Box 1a as the gross amount of reportable payment transactions for the calendar year, "without regard to any adjustments for credits, cash equivalents, discounts, fees, refunds, or other amounts." It is the total dollar amount of transactions the platform processed for you, full stop — not a profit figure, and not even a figure net of money that was never yours to begin with.
Under marketplace-facilitator laws now in effect in every state that levies sales tax, large marketplaces are required to calculate, collect, and remit sales tax on a seller's behalf — the seller never receives that money or has to file it themselves. But that tax is still part of the dollar amount the buyer paid and the platform processed, so it commonly ends up inside Box 1a's gross total. It was never the seller's income and does not belong in a profit calculation.
Box 1a is defined without regard to refunds, so a sale that was later refunded can still show up in the gross total even though the money went back to the buyer. Some platforms report refunds in a separate statement or a later box; not all break it out clearly on the 1099-K itself, which is exactly why it is worth reconciling by hand against your own payout history rather than assuming the form nets it out for you.