A 1042 tax form is the annual return that U.S. withholding agents file with the IRS to report tax withheld on U.S.-source income paid to foreign persons during the calendar year. If you are the one making those payments, you file Form 1042. If you are the foreign person receiving the payments, you will instead get a Form 1042-S showing your income and the tax withheld, and you use that statement when you deal with the IRS.
Who Has to File Form 1042
The filer is the withholding agent: any person or entity with control over, or that makes, a payment of U.S.-source income to a foreign person.1eCFR. 26 CFR 1.1441-7 – General Provisions Relating to Withholding Agents That includes U.S. corporations paying dividends to overseas shareholders, universities paying stipends to foreign scholars, banks paying interest to nonresident account holders, and brokerages handling investment income for foreign clients.
If you issued any Form 1042-S during the year, you must file Form 1042, even when a treaty or exemption reduced the withholding to zero. The IRS still expects the summary return. You need an Employer Identification Number to file; if you don’t have one, apply on Form SS-4.2Internal Revenue Service. Instructions for Form 1042
The 30% Default Rate and How Treaties Change It
Withholding on U.S.-source fixed, determinable, annual, or periodical (FDAP) income paid to a foreign person starts at 30% of the gross payment.3Office of the Law Revision Counsel. 26 USC 1441 – Withholding of Tax on Nonresident Aliens The United States has income tax treaties with dozens of countries, and many reduce or eliminate withholding on specific income types.
To claim a reduced treaty rate, a nonresident payee gives the withholding agent a completed Form W-8BEN before payment. An agent who receives a properly completed W-8BEN can rely on it to apply the treaty rate.4Internal Revenue Service. Instructions for Form W-8BEN Without the form, the agent has no choice and must withhold the full 30%. When that happens, the payee’s only route to the excess is a refund claim on a U.S. tax return, which takes time. Even where a treaty drops withholding to zero, the agent still issues Form 1042-S and files Form 1042. The exemption cuts the tax, not the paperwork.
What Income Goes on Form 1042
Most reportable payments fall under the FDAP label, which the IRS reads broadly. Common examples include:
- Dividends from U.S. stocks
- Interest from corporate or government bonds
- Royalties for patents, copyrights, or other intellectual property
- Pensions and annuities paid to foreign beneficiaries
- Compensation for personal services performed in the United States
- Prizes and awards paid to nonresident athletes, performers, or contest winners
The trigger is U.S. sourcing: if the underlying activity, asset, or obligation is based in the United States, the payment generally requires withholding and reporting.5Internal Revenue Service. Fixed, Determinable, Annual, or Periodical (FDAP) Income
Form 1042 also carries a second regime: Chapter 4 (FATCA) withholding, which applies a 30% rate to certain payments to foreign financial institutions that don’t participate in FATCA reporting and to some passive non-financial foreign entities that fail to identify their substantial U.S. owners. When a payment could fall under both Chapter 3 and Chapter 4, Chapter 4 takes precedence and reporting happens under one chapter only.6Internal Revenue Service. Instructions for Form 1042-S
If You Received a Form 1042-S
Form 1042-S is the individual statement showing how much U.S.-source income you were paid and how much tax was withheld. It functions as the international counterpart to a W-2 or 1099.
If you need to file a U.S. tax return, typically Form 1040-NR for nonresident aliens, attach Copy C of your 1042-S and claim credit for the tax already withheld. In some situations you may not need to file at all: if you had no U.S. trade or business during the year and the withholding satisfied your entire U.S. tax liability, a return generally isn’t required.7Internal Revenue Service. 2026 Form 1042-S Filing is still worthwhile if you think too much was withheld, because a return is the only way to claim the refund.
Filing Deadline and How to File
Form 1042 is due March 15 of the year after the income was paid. If March 15 lands on a weekend or federal holiday, the deadline shifts to the next business day.8Internal Revenue Service. Discussion of Form 1042, Form 1042-S and Form 1042-T
Form 7004 grants an automatic six-month extension to file.9Internal Revenue Service. About Form 7004, Application for Automatic Extension of Time to File Certain Business Income Tax, Information, and Other Returns The extension covers the return only. Any tax owed still has to be deposited by the original March 15 date, or interest and penalties start running.
Withholding agents filing 10 or more information returns in a calendar year must file electronically.10Internal Revenue Service. E-file Information Returns Financial institutions reporting under Chapter 3 or Chapter 4 must file electronically regardless of volume, as must partnerships with more than 100 partners.11Internal Revenue Service. Electronic Reporting of Form 1042-S Electronic filings currently go through the IRS Filing Information Returns Electronically (FIRE) system.12Internal Revenue Service. Filing Information Returns Electronically (FIRE) Agents filing fewer than 10 returns can send paper copies by mail; paper filers use Form 1042-T as the transmittal cover sheet for their 1042-S forms.13Internal Revenue Service. About Form 1042-T, Annual Summary and Transmittal of Forms 1042-S
Reconcile the totals on Form 1042 against your individual 1042-S forms before submitting. Mismatches are one of the fastest ways to trigger an automated IRS notice.
Depositing the Withheld Tax
Deposit timing follows a tiered schedule. If accumulated undeposited withholding hits $2,000 or more during any quarter-monthly period (the periods end on the 7th, 15th, 22nd, and last day of each month), the deposit is due within three business days. Amounts between $200 and $2,000 at month-end are due within 15 days after the month closes. If the full-year total is under $200, you can pay it with the return. All deposits go through the Electronic Federal Tax Payment System (EFTPS).2Internal Revenue Service. Instructions for Form 1042
Penalties for Late or Missing Filings
For returns due in 2026, the failure-to-file penalty for each Form 1042-S follows a tiered schedule:14Internal Revenue Service. Information Return Penalties
- 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, with no calendar-year cap
Annual caps apply to the first three tiers and scale with the size of the filer’s business, running up to $4,098,500 for larger entities and $1,366,000 for smaller ones.15Internal Revenue Service. Rev. Proc. 2024-40
A withholding agent who willfully fails to collect or pay over the tax faces criminal liability separately. The offense is a felony carrying a fine of up to $10,000, up to five years in prison, or both.16Office of the Law Revision Counsel. 26 U.S. Code 7202 – Willful Failure to Collect or Pay Over Tax The willfulness threshold is high; simple mistakes and negligent late filings don’t cross it, but intentionally keeping withheld funds or systematically ignoring the obligation can.
Fixing a Mistake After You File
There is no separate amended version of Form 1042. To correct an error, file a new Form 1042 for the year in question, check the “Amended Return” box at the top, complete the entire return with corrected figures, and attach a statement explaining what changed and why.2Internal Revenue Service. Instructions for Form 1042
If you catch overwithholding before March 15, you can often resolve it through a reimbursement or set-off procedure rather than an amended return. After the deadline, the amended return is generally the only route. Fixing errors quickly limits your penalty exposure and spares the foreign payee from having to chase a refund through the IRS on their own.