The 1099-K, explained for a preparer: it reports the gross amount a card processor or payment app settled to a payee during the year, before fees, refunds and chargebacks. It is a record of money moved, not a measure of income. Squaring it with the client's books means walking from that gross figure to the ledger's sales.
What a 1099-K reports: gross payments, not income
A 1099-K reports gross payments, not income. The figure in Box 1a is every reportable card or payment-app transaction settled to the payee in the calendar year, with nothing taken out. Fees, refunds, chargebacks and sales tax are all still inside it, so it is almost always larger than what reached the bank.
The IRS Instructions for Form 1099-K (Rev. December 2026) define "gross amount" as "the total dollar amount of total reportable payment transactions for each participating payee without regard to any adjustments for credits, cash equivalents, discount amounts, fees, refunded amounts, shipping amounts, or any other amounts." That sentence is the reason the 1099-K never matches a deposit total.
The boxes a preparer reads:
- Box 1a: the gross amount of reportable payment card or third party network transactions for the year.
- Box 1b: the part of Box 1a where "the card was not present at the time of the transaction or the card number was keyed into the terminal," which the instructions say typically means online, phone or catalogue sales.
- Box 2: the four-digit merchant category code the processor assigned to the business.
- Box 3: "the number of payment transactions (not including refund transactions)."
- Box 4: backup withholding, if any.
- Boxes 5a to 5l: the gross amount for each month of the calendar year.
- Boxes 6 to 8: state information for up to two states.
The current form also has Box 1c for cash tips and Box 1d for a tipped occupation code, both new for the December 2026 revision. A filer checkbox at the top says whether the form covers payment card transactions or third party network transactions; the instructions require a separate form when one payee has both.
The IRS page What to do with Form 1099-K (July 2026) puts the gap plainly. Fees, refunds, shipping and similar items in the gross figure "are not taxable income. You can deduct them from the gross amount." The work is showing how.
Who issues a 1099-K, and at what threshold?
A 1099-K is issued by a payment settlement entity: the card processor that settles card sales, or a third party settlement organization (TPSO) such as a payment app or online marketplace. Under current IRS guidance, card transactions have no reporting threshold, while a TPSO reports only above $20,000 and 200 transactions.
The 2026 instructions say "A payment settlement entity (PSE) must file Form 1099-K." Under the exception for de minimis payments, a TPSO reports a payee's third party network transactions only if, for the calendar year, "The gross amount of total reportable payment transactions exceeds $20,000, and The total number of such transactions exceeds 200." Both conditions must be met. Neither the instructions nor the IRS FAQ pages cited here name a tax year for these thresholds; they state them as the current rule.
Card sales work differently. The IRS Form 1099-K FAQs: General information (Fact Sheet 2025-08, October 23, 2025) says "There is no threshold amount that must be met" for a form issued because of payments received through a payment card transaction. A coffee cart with modest card sales can still receive one.
The threshold has moved in recent years, which is why old organizers and client emails disagree. The same IRS FAQ says the One, Big, Beautiful Bill "retroactively reinstated the reporting threshold in effect prior to the passage of the American Rescue Plan Act of 2021." Any lower figure a client remembers from earlier announcements does not describe the form they hold.
A form below the threshold is not an error on its face. The IRS page Understanding your Form 1099-K (June 2026) says "You may receive a Form 1099-K even when total payments or transactions are less than the reporting threshold." The threshold controls when the issuer must file, not whether the income is reportable. Which forms a rideshare or delivery driver tends to receive is covered in rideshare tax forms drivers receive.
Reconciling a 1099-K to the client's books
Reconciling a 1099-K to the client's books means starting at Box 1a and explaining every difference until the ledger's sales figure is reached. Refunds, processor fees, sales tax and year-end timing account for most of the distance. Sales paid by cash or check sit outside the form altogether and are added separately.
The IRS Instructions for Schedule C (2025) frame the destination. Line 1 is "gross receipts from your trade or business," and the instructions say to "check any Forms 1099 you received for business income that must be reported on this line." Line 2 is "sales returns and allowances," described as "a cash or credit refund you gave to customers." The documents a sole proprietor should send for the rest of Schedule C are listed in the Schedule C checklist for sole proprietors.
Worked reconciliation from 1099-K gross to Schedule C
The client is fictional: Example Pottery Studio, a sole proprietor, tax year 2026, with card sales through Example Pay, merchant account XXXX-4821. The figures are examples that show the walk, not a treatment for a real return.
| Line | Example amount | Where the figure comes from |
|---|---|---|
| 1099-K Box 1a, gross card sales | $62,480.00 | Form from Example Pay |
| Customer refunds processed through Example Pay | ($1,860.00) | Processor refund report; candidate for Schedule C line 2 |
| Processor fees withheld from payouts | ($1,935.00) | Processor fee report; an expense, not a reduction of line 1 |
| Net payouts deposited to the bank | $58,685.00 | Bank statements, twelve months |
| Cash and check sales recorded in the ledger | $4,150.00 | Deposit slips; not on any 1099-K |
| Commission from Example Design Co., paid by card through Example Pay | $2,400.00 | Also shown on a 1099-NEC; already inside Box 1a |
| Gross receipts before the sales tax question | $66,630.00 | Box 1a plus cash and check sales |
Read the table top to bottom. Box 1a less refunds and fees equals the deposits: $62,480.00 minus $1,860.00 minus $1,935.00 is $58,685.00. That tie proves the form and the bank agree. Gross receipts then add the cash and check sales that never touched the processor: $62,480.00 plus $4,150.00 is $66,630.00.
The $2,400.00 commission is not added. Example Design Co. paid it by card, so it is already in Box 1a, and the 1099-NEC it also issued describes the same money a second time.
Sales tax needs its own decision. Suppose $3,120.00 of the gross was sales tax collected at the register. The Schedule C instructions say sales tax "imposed on the buyer that you were required to collect and pay over" is not included in gross receipts, while tax imposed on the seller and collected from the buyer must be included. Which applies depends on the state's law, so the reconciliation keeps the figure in its own column.
Using the 1099-K monthly boxes to find a gap
The 1099-K monthly boxes, 5a through 5l, split the year's gross into January through December. Comparing each month with that month's deposits and recorded sales shows where a difference started. A single bad month is easier to explain than an annual total that is off by an unknown amount.
The instructions tell the filer to enter "the gross amount of the total reportable payment transactions for each month of the calendar year." The twelve monthly figures should add to Box 1a, which is the first check: if they do not, ask the issuer before doing anything else.
Here is an example comparison for four months of the fictional studio:
| Month | 1099-K monthly box (example) | Deposits from Example Pay (example) | Difference | What explained it |
|---|---|---|---|---|
| March, Box 5c | $4,880.00 | $4,731.00 | $149.00 | Fees for the month |
| April, Box 5d | $5,120.00 | $4,962.00 | $158.00 | Fees for the month |
| May, Box 5e | $6,210.00 | $3,980.00 | $2,230.00 | A payout sent to a second bank account the firm had not seen |
| December, Box 5l | $7,940.00 | $6,815.00 | $1,125.00 | Fees, a refund, and a December 31 payout that reached the bank in January |
Fees produce a small, steady difference each month. A jump like May's points to money that went somewhere else: a second account, a held payout, or a reversed transaction. December needs care because a payout initiated on the last day of the year may reach the bank in January. The processor's own payout report shows which date it used.
The monthly comparison needs a full run of statements. A missing month on the bank side looks like a gap on the 1099-K side. Twelve statements for every account the processor pays into are the minimum.
What if a 1099-K includes personal or duplicate payments?
A 1099-K that includes personal or duplicate payments overstates what the client received for business. The IRS says personal payments from friends and family should not be on a 1099-K and are not taxable income. Duplicates, such as a payment also on a 1099-NEC, describe the same money twice and are counted once.
Personal payments. The IRS page Understanding your Form 1099-K says personal payments "should not be reported on a Form 1099-K" and that "These payments aren't taxable income." Its examples include splitting a meal or a car ride, gifts, and a roommate paying back rent. The first step on the IRS page What to do with Form 1099-K is to ask the issuer: "Ask for a corrected Form 1099-K that shows a zero amount." If the issuer will not correct it, the same page says "Don't contact the IRS. We can't correct your Form 1099-K," and describes reporting the amount from the incorrect form in the entry space at the top of Schedule 1.
Personal items sold at a loss. The same page says "If you sold items at a loss, which means you sold the items for less than you paid, there is no tax liability." It describes two ways to show this: the entry space at the top of Schedule 1, or Form 8949 flowing to Schedule D. A client clearing out a garage on a marketplace app needs a rough record of what each item originally cost.
Duplicates. The IRS page lists "Duplicates a Form 1099-K you already received" among the reasons a form may be wrong. A payment can also appear on both a 1099-K and a 1099-NEC, as in the worked example. Why card payments should have been left off the 1099-NEC is explained in card payments to leave off the 1099-NEC. For the reconciliation, the rule of thumb is to trace each payment to one deposit and count it once.
Schema CPA reads the 1099 series and exports what it reads to Excel or CSV, which gives a firm the 1099-K and 1099-NEC figures side by side for the walk above; QuickBooks Online and Xero connections are on the roadmap and not available. The document types it reads are on the homepage, and firms can get started free with up to three clients.
Wage clients have their own codes to decode; see W-2 Box 12 codes. Government payments such as unemployment and state refunds come on the 1099-G.