- How the case starts
- The vendor-file sweep
- The W-8 checklist examiners apply
- U.S. indicia that kill reliance
- No W-8: the presumption rules
- Late and defective W-8s: the cure
- How long a W-8 lasts
- One exam, two returns: 1042 and 945
- The Form 1042 deposit clock
- What Ogden does and does not check
- Questions people ask
How the case starts
The Foreign Payments Practice in LB&I downloads every 1042-S the payer filed and scores it: the risk metric is "(Gross Income Amount times 30%) minus Amount Withheld," with a three-year comparison of reported payments and a note that "improper income code use could be an indication for a potential examination lead" (IRM 4.10.21.8, 4.10.21.9.8). Industries called out: professional services partnerships, high tech, entertainment and publishing, pharmaceuticals, real estate, daily fantasy sports and online advertising (IRM 4.10.21.10.2). Related-party returns are mined too: Form 5471 Schedule M and Form 5472 Parts IV and VI list royalties, guarantee fees, insurance premiums and "other amounts paid" to foreign affiliates, and if no 1042-S matches them, "an explanation should be provided by the taxpayer" (IRM 4.10.21.10.5).
The opening questions are about records: is the W-8 system paper or electronic, does each recipient have a folder, does the company have an electronic-W-8 memorandum with the IRS and follow it (IRM 4.10.21.8). Then the written procedures: system flowcharts, W-8 validation, undocumented-account handling, deposits, reimbursement and escrow, and how the presumption rules are applied (IRM 4.10.21.9.1.1). A company with no written procedure for undocumented vendors has already answered a question.
The vendor-file sweep
For a non-financial payer, IRM 4.10.21.10.3 is a three-step procedure applied to the accounts payable and vendor files.
- Flag possible foreign payees by any of: an EIN beginning with 98; an ITIN (a TIN beginning with 9); a country that is not the U.S. or is blank; a ZIP code not in U.S. format; a state that is not a U.S. state or is blank; a foreign city; the payer's own foreign-vendor coding; "any other factors." The list is presented to the company, which may remove payees it "can establish" are not foreign.
- Identify the FDAP payments among what was paid to that list: interest, royalties, rents, dividends, services performed in the United States by a nonresident, pensions. The examiner tests the expense categorization first, because "a contract for computer hardware might include a service component."
- Source the income. "The regulations ... require that the income payments be presumed U.S. source when the source is not known to the payer ... The taxpayer has the burden of proof to overcome the presumption." Services are sourced where performed, royalties where the property is used, rents where the property is, interest and dividends by the payer's residence.
The closing test is arithmetic: "If less than 30 percent was withheld and reported on the filed forms, the examiner should request and examine the Forms W-8 and Forms 8233." Paid FDAP with no 1042 or 1042-S filed: "substitute or delinquent return procedures should be followed" (IRM 4.10.21.10.6). The W-8 validity calculator runs the sweep's first step on a vendor row and the checklist's expiration test on the form.
The W-8 checklist examiners apply
Three steps for every certificate (IRM 4.10.21.9.6): a line-by-line review of the form itself, a comparison against the account file for contradictions, and an expiration check. The specific points: the name matches the records; the chapter 3 status "is reasonable"; a U.S. TIN is present when required; a treaty actually exists with the country claimed; every element of a treaty claim is present, including the specific limitation-on-benefits provision for an entity; chapter 4 status and GIIN for a withholdable payment to an entity, with the GIIN verified against the published FFI list; the form is signed and dated (or date-stamped on receipt); it is the correct revision; and a foreign TIN, or a "reasonable explanation" for its absence, and date of birth for accounts at U.S. offices.
"Avoid focusing on insignificant failures. The absence of a foreign or U.S. TIN when either is required is not an insignificant failure" (IRM 4.10.21.9.6(1)).
The reasonable explanation for a missing foreign TIN "includes a statement that the entity is not legally required to obtain a TIN in its jurisdiction," written on the form, in the margin, or attached (IRM 4.10.21.6.3). A treaty claim where "there is no U.S. income tax treaty in force with the recipient's country of residence during the year of payment" is automatic reason to know (IRM 4.10.21.7.2). On limitation on benefits, the examiner "generally need not require ... an attachment ... describing the beneficial owner's analysis"; the checked box suffices absent actual knowledge (IRM 4.10.21.7.1.4.1).
U.S. indicia that kill reliance
A facially valid W-8 is unreliable if the payer's own records contradict it: a U.S. mailing address, a U.S. driver's license used as identification, a U.S. birthplace on the passport, a hold-mail instruction, a U.S. telephone number, or a classification as a U.S. person in the payer's systems (IRM 4.10.21.9.6(1)(b)). A payer that relies on an onboarding agent "is generally considered to know, or have reason to know, facts within the knowledge of its agent" (IRM 4.10.21.9.3.1). The standard is whether the information "would cause a reasonable person to question the claims made." When it does, the payer "must generally either withhold at the maximum tax rate of 30% or withhold at the backup withholding rate (currently 24%), as determined based on the presumption rules" (IRM 4.10.21.9.3).
No W-8: the presumption rules
IRM 4.10.21.9.3.3.2, 4.10.21.9.3.3.3 (May 12, 2026). Account-opening KYC data "cannot be used in lieu of presumption rules for undocumented account holders" (Exhibit 4.10.21-2).
Actual knowledge runs only one way, toward more withholding: a payment to a U.S. person known to be acting for a foreign person is treated as made to the foreign person (IRM 4.10.21.9.3.2). A nonqualified intermediary that does not allocate its withholding statement has the undocumented portion "treated as allocated to unknown recipient and subject to 30% withholding tax" (IRM 4.10.21.9.10.9.2).
Late and defective W-8s: the cure
| When the W-8 arrives | What makes it acceptable for the earlier payment (IRM 4.10.21.9.7.3) |
|---|---|
| Within 30 days of the payment | Nothing more: it "will not be considered unreliable solely because it does not contain an affidavit." |
| More than 30 days, up to one year | A signed, dated affidavit under penalties of perjury that the information was accurate at the time of payment. |
| More than one year after the payment | The affidavit plus documentary evidence: a government ID without a U.S. address or a foreign certificate of incorporation; for a treaty claim, photo identification issued within three years, otherwise a bank statement or utility bill. |
| A late W-8ECI | The affidavit must state that the income was or will be included on a U.S. return. |
Address defects are cured for an individual with a foreign government ID without a U.S. address plus "a reasonable written explanation from the account holder supporting foreign status," and for an entity with formation documents; treaty claims need residency documentation in the treaty country (IRM 4.10.21.9.7.2). Once the IRS tells a payer a claim is incorrect, the payer "will have actual knowledge ... beginning on the date that is 30 calendar days after the date the notification is received" (IRM 4.10.21.7.1.4.3). The late W-8 affidavit template has the wording.
How long a W-8 lasts
The general rule is the signature date through December 31 of the third following year: "a Form W-8BEN signed September 2019 will expire 12/31/2022." A W-8BEN or BEN-E supported by documentary evidence with no U.S. address, phone or standing instructions is valid indefinitely, but "the portion ... that includes the treaty claim is subject to the general 3-year validity rule." A W-8ECI is always three years. A W-8EXP is indefinite for governments and central banks, and for a tax-exempt organization only "provided that the withholding agent reports on Form 1042-S at least one payment annually to the entity." A W-8IMY is indefinite but the certificates under it are not. Documentary evidence lasts three years or its own expiration; non-renewable documents such as a certificate of incorporation, indefinitely (Exhibit 4.10.21-3). A change in circumstances invalidates a form when the payer "knows or has reason to know" of it; the payee has 30 days to report one, and payers "are required to notify any person providing documentation of the person's obligation to notify the withholding agent of a change" (Exhibit 4.10.21-1). Form 8233 is annual. A Form W-9 collected for chapter 3 purposes "must be retained for three years from the date the account is opened."
One exam, two returns: 1042 and 945
"A major determination for a withholding agent is in properly documenting or otherwise classifying a recipient as either a U.S. or a foreign person," and reclassifying vendors from foreign to U.S. "produces collateral adjustments to Forms 1099 and 945" (IRM 4.10.21.4). The examiner protects both statutes, Form 872 for the 1042 and Form SS-10 for the 945 (IRM 4.10.21.8). A payee that is an exempt recipient for 1099 purposes is "not necessarily exempt from the NRA withholding requirements," and a 1042-S is required even where nothing is withheld: "a payment may be reportable even if it is not withholdable." Under IRC 1461 the payer is liable for the tax it did not withhold, and under 1463 for interest and penalties even where the payee paid. The reasonable-cause factors weighed against a payer: "ignorance of the law is generally not accepted"; where withholding is "part of the ordinary course of business ... it may be more difficult"; a repeat adjustment on the same issue is worse; compliance with a prior remediation plan helps (IRM 4.10.21.12.3).
The Form 1042 deposit clock
| Undeposited chapter 3 and 4 tax | Deposit due (IRM 3.21.110.17, 20.1.4.11.1) |
|---|---|
| $2,000 or more at the end of a quarter-monthly period (the 7th, 15th, 22nd and last day of the month) | Within three business days after the period ends |
| $200 to under $2,000 at the end of a month | By the 15th of the following month |
| Under $200 at the end of the year | With the Form 1042 by March 15 |
| $200 or more at the end of December, paid with the return | "May be subject to the 10 percent avoidance penalty" (IRM 20.1.4.6(9)) |
Deposits go through EFTPS. The record of liability on the return (lines 1 to 60) must show quarter-monthly liability dates, and "the examiner should ensure that the withholding agent did not instead complete this section ... based on deposit dates, as this error may prevent identification of late deposits" (IRM 4.10.21.9.1.2). A blank schedule is averaged by 24 for penalty purposes; a negative entry is zeroed with a notice. Form 7004 extends the filing date to September 15 but "does not provide additional time to pay" (IRM 20.1.4.11). And a 1042 deposit penalty "will not systemically recompute" when 1042-S credits change; it must be requested (IRM 20.1.4.22(6)).
What Ogden does and does not check
At processing, the 1042-S is barely validated. A recipient TIN of all zeros or all nines: "continue processing as is." A missing income code, exemption code or unique form identifier: research, and if nothing is found, continue. "Research is not required when a valid TIN is not present on an electronic Form 1042-S" (IRM 3.22.111.11.3.27). The instruction repeated across the correction manual is "DO NOT change information submitted by the Withholding Agent." There is no CP2100 for 1042-S recipients, no processing-level TIN match, no GIIN check against the FFI list. What processing does enforce is the transmittal: a 1042-T whose chapter, amended, pro-rata or partnership indicators do not match its 1042-S forms is "not correctable" and the batch is renumbered and re-input, and a non-correctable record "will not post" to the information returns file, so the recipient's credit never becomes matchable (IRM 3.22.111.10.4.8, 3.22.111.9). Everything the processing side lets through, the examination side tests. That is why the missing foreign TIN that Ogden waves past is "not an insignificant failure" in the field.
Questions people ask
Our vendor has a 98-prefix EIN but a U.S. address and a W-9. Foreign or not?
The 98 prefix puts it on the sweep's list, and the manual notes that before 2001 only foreign corporations had 98 or 33 prefixes. A W-9 from a U.S. entity settles it as U.S. for the payer, but the examiner will look at what else is in the file; a foreign incorporation document beside the W-9 is reason to know.
The W-8BEN-E has no foreign TIN. Is the whole form bad?
For a financial account at a U.S. office, a missing foreign TIN without a reasonable explanation is a material failure. For an ordinary vendor payment the TIN requirement depends on the claim: a treaty claim on a W-8BEN-E generally requires a U.S. TIN or a foreign TIN in lieu of it, with exceptions for marketable securities (IRM 4.10.21.6.3). Get the explanation written on the form either way.
We found unfiled 1042-S forms for prior years. Is there a disclosure route?
Yes, at IRM 4.10.21.14: one complete submission to the Foreign Payments Practice with six years of returns, a reconciliation, a four-question statement, a declaration signed by the payer (not the representative), and the tax paid; the 1042-S must show the tax as paid by the withholding agent in box 11. Not available to anyone already contacted, anyone who used it in the past five years, or QIs. No closing agreement is issued and penalty relief "is not guaranteed."
Does the 30% presumption apply to services we paid a foreign contractor for work done abroad?
Services are sourced where performed. Work performed entirely outside the United States is foreign-source income, not FDAP subject to withholding, but the burden of showing where the work was done is the payer's, and the contract, invoices and travel records are what the examiner asks for.