Your 1099 in a payee's audit: when the examiner must call you, the $100,000 rule, and the Portillo problem

A 1099 as evidence

When the IRS examines an individual for unreported income, the usual starting point is the Information Returns Program: the W-2s, 1099s and other documents payers filed, matched against the return. The manual's term for them is IRP documents, and for most cases they are the whole case. "When using the specific item method for adjustments based on unreported IRP income, if the taxpayer fails to respond or raise a 'reasonable dispute' regarding the correctness of the IRP data, then the burden of proof remains with the taxpayer and does not shift to the government" (IRM 4.10.4.2.6.2, Aug. 9, 2011).

The same documents feed the automated underreporter program, where the payer's involvement is a Letter 2625-C, and the refund-hold program described below. This page is about the examination, where a human examiner decides whether to take your 1099 at face value.

IRC 6201(d): when the IRS must verify

IRC 6201(d) was written for exactly this situation. The manual summarizes it: "IRC 6201(d) creates a legal requirement to contact third parties to verify income where the taxpayer reasonably disputes the income and fully cooperated with the IRS" (IRM 4.12.1.6, Oct. 5, 2010). The statute itself says that in a court proceeding, if the taxpayer asserts a reasonable dispute about an item of income reported on an information return filed by a third party, and has fully cooperated with the IRS, the IRS has the burden of producing reasonable and probative information concerning the deficiency in addition to the information return. The third party is you, and the "reasonable and probative information" is what the examiner gets from you.

The examiner's instruction follows the statute: "In unreported income cases based on IRP information, there is no legal requirement pursuant to IRC 6201(d) ... to contact third parties to verify income items unless the taxpayer reasonably disputes the income and has fully cooperated with the IRS" (IRM 4.10.4.2.6.2). And the contact itself is governed by IRC 7602(c): "The IRC 7602(c), Notice of contact of third parties, requirement to provide the taxpayer with notice of third party contacts applies" (IRM 4.10.4.2.5, Aug. 9, 2011). The payee is told, in advance, that people who paid them may be contacted; the mechanics of that notice and what a payer must answer are on IRS asking about a payee.

The four triggers, from the manual

The no-response rule is blunt: "In no show/no response cases where the taxpayer has not responded or raised a frivolous dispute (wages are not income, etc.), there is no legal requirement for further verification with third parties and an income adjustment in the amount reflected on the IRP document is appropriate" (IRM 4.10.4.2.6.2). A payee who ignores the audit is assessed on your 1099 as filed, and the first a payer hears of it may be a collection contact or a levy naming the payee.

The fraud rule is the opposite: "Verification with third parties is required when IRP information is relied upon to support the civil fraud penalty (IRC 6663, Imposition of fraud penalty) or where the taxpayer disputes the IRP income information." An examiner building a fraud case on your 1099 has to confirm it with you first.

The face-of-the-document rule covers the case where the payee said nothing but the 1099 looks wrong: "Verification of income should be attempted if there is some obvious inconsistency in the IRP information (such as Form 1099 or Form W-2) that appears to be out of line in dollar amount from previous years, or there is some aspect of the Form 1099 or Form W-2 that is unusual on its face (such as Form 1099 or Form W-2 income that is completely inconsistent with the known profession or occupation of the taxpayer)" (IRM 4.10.4.2.6.2; the same language is in IRM 4.12.1.25.1, Oct. 5, 2010). A 1099-NEC for $180,000 filed on a payee whose prior years show $12,000 draws a call whether or not the payee disputes it, and so does a 1099 with a transposed amount.

The $100,000 rule is discretionary and documented. It is also the reason a large 1099 is more likely than a small one to bring the examiner to your door even in a clean case: the manual asks the examiner and manager to decide, in writing, whether to verify it.

The Portillo problem

The manual teaches Portillo as a limit on the IRS, but it is a lesson for payers too. In that case the payer "was only able to document the portion of additional income with which the taxpayer agreed," and the deficiency built on the rest of the 1099 fell. When an examiner verifies a 1099 with you, the question is not whether you filed it but whether you can show what it reports: the contract, the invoices, the payment records, the Form W-9. A 1099 the payer cannot support is, in the court's words, a document the IRS cannot simply assume is correct.

The practical consequence is a records question. The payment records behind each 1099 should be kept for as long as the payee's return can be examined, which is at least three years from the payee's filing date and six where a substantial omission is alleged, longer than the payer's own retention period for the form.

The refund-hold version: Letter 6255C and the 60-day wait

Outside examination, the same verification runs inside Return Integrity and Verification Operations, which holds a refund when the withholding claimed on a return does not match what payers reported. The taxpayer receives Notice CP 05A and is asked for income documents. When the documents the taxpayer sends are not on the IRS's own file of information returns, the manual turns to the payer: "The taxpayer responds and has provided additional information to verify the withholding claimed on the return, but none of the information is available on CC IRPTR ... If the business is valid, a Third Party Contact must be done," with a 60-day suspense, and "Send Letter 6255C, Third-Party Notification, to taxpayer ... After 60 days, contact the business" (IRM 25.25.11.3.2, Jan. 9, 2026).

From the payer's side this is a call or letter asking whether the person worked for you, the dates, and the amounts paid and withheld, usually about a W-2, 1099-R or 1099-NEC with withholding. A payer that filed on time and whose figures match the payee's copy is never contacted at all: the IRPTR check ends the case. The contact means the IRS has the payee's copy and not yours, or the two disagree. The 60-day wait is the third-party contact notice period; in hardship cases routed through the Taxpayer Advocate the payee can consent orally and the wait is skipped.

What the verification asks

• Authentication first. The examiner or RIVO assistor confirms your business and your role before discussing the payee; expect to give part of the EIN and have the rest confirmed.
• Did this person provide services or receive payments from you, and when.
• The amounts. Gross paid for the year, any federal withholding, and whether a corrected form was filed.
• The basis. For a disputed amount, the invoices or contract behind the figure. This is the Portillo question.
• Nothing about the payee's own tax. The examiner cannot tell you what the payee reported, and should not ask you to characterize the relationship beyond the facts of the payments.

Answer what is asked, in writing where possible, with copies rather than originals. What a payer is required to answer, and what a summons can reach if it refuses, is on IRS summons for payee records.

When the payee is right and the 1099 is wrong

Verification sometimes shows the payer's error: a duplicate form, a payment to a different vendor with a similar name, an amount that included reimbursements the payee says were not income, or a form filed under the wrong TIN. The remedy is a corrected 1099, filed as described on how to correct a 1099, and a corrected statement to the payee. A correction filed during the payee's audit resolves the examiner's item; a correction refused leaves the examiner to decide under Portillo whether the original is reliable. A wrong 1099 that the payer will not correct is also the fact pattern behind a payee's CP2000, where the payee's only route is to dispute your document.

Questions people ask