Form 1042-S Instructions: Filing, Corrections, and Penalties

The instructions for Form 1042-S require a separate return for each foreign recipient and each type of U.S. source income you paid them, filed with the IRS by March 15 of the following year along with copies to the recipient. The form reports fixed, determinable, annual, or periodical (FDAP) income paid to a foreign person and the federal tax withheld, and it must be filed even when the withholding rate is zero because of a treaty or statutory exemption.¹

When You Have to File Form 1042-S

A withholding agent files Form 1042-S for every payment of U.S. source FDAP income to a foreign person. Typical payments include dividends from U.S. corporations, interest, rent, royalties, compensation to a nonresident alien contractor for services performed in the United States, and scholarship or fellowship grants to foreign students. Amounts that qualify for the IRC Section 117 exclusion (tuition and required fees) are the exception and stay off the form.¹

The default withholding rate on FDAP income to a foreign person is 30% of the gross payment.² It drops only when the recipient hands you valid documentation claiming a treaty rate or a statutory exemption. Chapter 3 rules look at the recipient’s foreign status and the type of income. Chapter 4 (FATCA) adds a parallel layer focused on whether a foreign financial institution or non-financial foreign entity has properly identified itself and any U.S. owners. If the FATCA documentation is missing, you withhold 30% under Chapter 4.³

One form does not cover multiple income types. If you paid the same foreign person both dividends and royalties, that’s two Forms 1042-S, one per income code.

Get the W-8 Before You Pay

Everything on Form 1042-S flows from the W-8 the recipient signed before or at the time of payment. The right variant depends on who the recipient is:

Form W-8BEN is for individual nonresident aliens certifying foreign status and, when applicable, claiming a reduced treaty rate.⁴
Form W-8BEN-E is for foreign entities (corporations, partnerships, trusts), certifying foreign status and providing the entity’s FATCA classification.⁴
Form W-8ECI is for a recipient certifying that the income is effectively connected with a U.S. trade or business, which removes the standard withholding and shifts reporting.⁴

The W-8 gives you the recipient’s legal name, permanent residence address, foreign taxpayer ID, and the treaty country and article number if a reduced rate is claimed. Validate it. The withholding agent is on the hook for any under-withholding that results from relying on an invalid or expired W-8. Without a valid W-8, apply the full 30%.

Filling Out the Form

Form 1042-S captures the payment, the reason for any reduced or zero withholding, the tax actually withheld, and identifying details for the recipient and the withholding agent. Box numbers below reflect the 2026 form.⁵

Income Code and Gross Amount

Box 1 takes a two-digit income code identifying what you paid. Some of the codes you’ll see most:

Code 06: Dividends paid by U.S. corporations
Code 14: Real property income and natural resources royalties
Code 15: Compensation for independent personal services performed in the United States
Code 16: Scholarship or fellowship grants
Code 27: Publicly traded partnership distributions subject to IRC Section 1446(a)

Each income type carries its own withholding rules and treaty rates, which is why the IRS requires a separate form for each code paid to the same recipient.¹

Box 2 is gross income: the total payment before any federal tax withholding. That figure is the base for the withholding calculation.

Exemption Codes and Tax Rates

The form runs Chapter 3 and Chapter 4 on parallel tracks, each with its own exemption code and rate box.

Box 3a is the Chapter 3 exemption code, explaining why the income was exempt from or subject to a reduced rate. Common entries:⁶

Code 02: Exempt or reduced withholding under the Internal Revenue Code
Code 04: Exempt or reduced withholding under a tax treaty (the recipient’s country code must be a treaty country)
Code 05: Portfolio interest exempt under IRC Section 871(h) or 881(c)
Code 12: Payee subjected to Chapter 4 withholding

Box 3b is the Chapter 3 tax rate, from 0.00% up to 30.00%. It must match the treaty article claimed on the W-8, or read 30% if no valid documentation exists.⁵

Box 4a is the Chapter 4 exemption code, explaining why FATCA withholding did not apply. Common entries:⁵

Code 13: Grandfathered payment
Code 14: Effectively connected income
Code 15: Payee not subject to Chapter 4 withholding
Code 16: Excluded nonfinancial payment

Box 4b is the FATCA rate, typically 30% when withholding applies or 0.00% when an exemption code sits in Box 4a.

Withholding Amounts

Box 5 (withholding allowance) applies mainly to scholarship and fellowship income (Code 16) where a treaty exempts withholding up to a set dollar amount. For most other income codes it stays blank.¹

Box 7a is the federal tax actually deducted and sent to the IRS: Box 2 multiplied by the applicable rate. Box 10 is the withholding credit the recipient can claim on their return.⁷

Recipient Information

The Box 13 section identifies the foreign person: name, address, two-letter ISO country code, and U.S. taxpayer identification number. For individuals the TIN is usually an ITIN. A TIN is required when the recipient claims a treaty benefit or the income is effectively connected with a U.S. trade or business.⁶

The section also includes a recipient code classifying the type of foreign person, plus Chapter 3 and Chapter 4 status codes. A foreign financial institution’s Global Intermediary Identification Number goes in Box 13d.⁶ Every recipient detail must match the W-8.

Withholding Agent and Payer

The withholding agent section requires the agent’s name, address, U.S. EIN, and both a Chapter 3 and Chapter 4 status code. Both status codes are required regardless of the payment type.⁶ When the agent acts on behalf of a separate payer (the person whose account was actually debited), the payer’s identifying information goes in the dedicated payer fields, with its own Chapter 3 and Chapter 4 status codes.

Deadlines and How to File

Form 1042-S is due to the IRS by March 15 of the year following the calendar year of payment. For tax year 2025, March 15, 2026 is a Sunday, so the deadline shifts to Monday, March 16, 2026.⁸ Copies B, C, and D go to the recipient by the same date; they need those copies to file their U.S. return and claim credit for the tax withheld.

Paper filers submit Copy A with a transmittal, Form 1042-T.⁸ Electronic filers do not use Form 1042-T.

Who Must File Electronically

The old 250-return threshold is gone. Anyone required to submit 10 or more information returns in aggregate during the calendar year must file electronically.⁹ That aggregate covers almost all information return types, not just Forms 1042-S. Financial institutions reporting payments under Chapter 3 or Chapter 4 must file Forms 1042-S electronically regardless of volume, and partnerships with more than 100 partners face the same requirement.¹⁰

Electronic submissions for tax year 2025 go through the IRS Filing Information Returns Electronically (FIRE) system.¹¹

Extensions

You can request an automatic 30-day extension by submitting Form 8809 through the FIRE system before the due date.¹² The system displays an acknowledgment when the request is accepted. An extension to file with the IRS does not extend the deadline for furnishing copies to the recipient.

Reconcile With Form 1042

You also have to file Form 1042, the Annual Withholding Tax Return for U.S. Source Income of Foreign Persons, on the same March deadline. Form 1042 is the annual summary return. The total federal tax withheld across all your Forms 1042-S (Box 7a) must reconcile with the total tax liability reported on Form 1042. If you later amend a Form 1042-S in a way that changes the total, amend the Form 1042 too.

Fixing a Form 1042-S After You File

If you discover a mistake on a Form 1042-S already filed with the IRS, file an amended form. Check the “Amended” box at the top and enter the amendment number, a single digit starting at “1” for the first correction and increasing for each subsequent one to the same form. Keep the same unique form identifier as the original. Enter all the correct information on the new form, not just the fields that changed. Get corrected copies to the recipient promptly. If the original went in on paper, submit the amended form with a new Form 1042-T.¹

One trap catches people: if you already gave the recipient their copies but have not yet filed Copy A with the IRS, and you spot an error, do not check the “Amended” box. File a corrected original, meaning submit the form with the right information as if it were the first filing. The amended procedure only applies after the IRS has received the original.¹

If you filed the original electronically, any correction must also be filed electronically.¹⁰

Penalties for Late or Wrong Filing

The IRS imposes separate penalties for each Form 1042-S you fail to file correctly with the IRS and for each copy you fail to furnish to the recipient on time. For returns due in 2026, the per-form amounts are:¹³

Corrected within 30 days of the due date: $60 per return
Corrected after 30 days but by August 1: $130 per return
Filed after August 1 or not filed at all: $340 per return
Intentional disregard: $680 per return, or 10% of the total amount required to be reported if greater, with no maximum cap

These penalties hit both the IRS filing obligation and the recipient-furnishing obligation, so one missed form can generate two penalties.¹⁴ Maximum annual penalty amounts differ for small businesses (gross receipts of $5 million or less) and larger entities, and the intentional disregard penalty has no ceiling. A correction filed within 30 days costs a fraction of one filed after August, so catching mistakes early pays off directly.

1
Internal Revenue Service. Instructions for Form 1042-S (2026)
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Internal Revenue Service. Instructions for Form W-8BEN
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Internal Revenue Service. Withholding and Reporting Obligations
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Internal Revenue Service. About Form W-8 BEN
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Internal Revenue Service. Form 1042-S – Foreign Persons U.S. Source Income Subject to Withholding
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Internal Revenue Service. Instructions for Form 1042-S
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Internal Revenue Service. Instructions for Form 1040-NR (2025)
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Internal Revenue Service. Form 1042-T – Annual Summary and Transmittal of Forms 1042-S
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Internal Revenue Service. Topic No. 801, Who Must File Information Returns Electronically
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Internal Revenue Service. Electronic Reporting of Form 1042-S
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Internal Revenue Service. Filing Information Returns Electronically (FIRE)
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Internal Revenue Service. About Form 8809, Application for Extension of Time to File Information Returns
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Internal Revenue Service. Information Return Penalties
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Internal Revenue Service. Penalties Related to Form 1042-S