If you pay U.S. source income to a foreign person, the 1042 withholding rules generally require you to hold back 30% of the payment, send it to the IRS on a set deposit schedule, and reconcile the year on Form 1042 and Form 1042-S by March 15. The 30% rate can drop or disappear when a tax treaty covers the payment, but only if you collect the right paperwork from the recipient before you pay. Miss any part of this and the tax comes out of your own pocket, not the recipient’s.
Who Has to Withhold
A withholding agent is anyone who controls, receives, or pays an item of U.S. source income to a foreign person. The definition sweeps in corporations, partnerships, trusts, individuals, and intermediaries like banks or brokers routing payments for someone else. If you are anywhere in the chain that moves the money to a foreign recipient, you probably have the obligation.
The liability is personal. Under 26 U.S.C. ยง 1461, every person required to withhold is liable for the full amount that should have been withheld, whether or not they actually collected it from the payee.1Office of the Law Revision Counsel. 26 U.S. Code 1461 – Liability for Withheld Tax The statute protects you from any claim by the payee for amounts you properly withheld, but it also means the IRS looks to you, not the foreign recipient, if the money never comes in.
What Payments Are Subject to the 30% Rate
The 30% withholding applies to Fixed, Determinable, Annual, or Periodical income, usually shortened to FDAP. That covers most passive income paid to foreign persons: interest, dividends, rents, royalties, compensation for services, and similar payments.2Internal Revenue Service. NRA Withholding The tax is calculated on the gross amount. No deductions.
Income effectively connected with a U.S. trade or business (ECI) is taxed at graduated rates like a U.S. person’s income and is generally excluded from the flat 30%. A foreign recipient who wants ECI treatment has to give you a Form W-8ECI before payment.3Internal Revenue Service. About Form W-8 BEN, Certificate of Foreign Status of Beneficial Owner for United States Tax Withholding and Reporting
Two related withholding regimes sit outside these rules and have their own forms: FIRPTA withholding on dispositions of U.S. real property interests under section 1445, and withholding on a foreign partner’s share of partnership income under sections 1446 and 1446(f).2Internal Revenue Service. NRA Withholding If your payment falls in one of those categories, the 1042 framework is not the right one.
Form 1042 also handles Chapter 4 (FATCA) withholding, which imposes 30% on certain withholdable payments to foreign financial institutions that don’t participate in FATCA and to certain foreign entities that don’t identify their substantial U.S. owners.4Internal Revenue Service. 2026 Instructions for Form 1042-S The deposit and reporting mechanics are the same.
Scholarships and Fellowships
Taxable scholarship or fellowship payments to nonresident aliens normally carry the 30% rate, but the rate drops to 14% for students, researchers, or grantees temporarily in the United States on an F, J, M, or Q visa if the payment qualifies.5Internal Revenue Service. Withholding Federal Income Tax on Scholarships, Fellowships and Grants Paid to Nonresident Aliens A treaty rate lower than 14% may apply depending on the recipient’s country of residence.
Getting to a Lower Rate
The default is 30% of the gross payment. That drops or goes to zero when the recipient’s country of residence has an income tax treaty with the United States covering that specific type of income.2Internal Revenue Service. NRA Withholding Treaty rates vary by country and by income category. Dividends to a resident of one country might face 15% while the same dividend to a resident of another faces 5% or nothing at all.
To apply a reduced rate, you need valid documentation from the foreign person before you pay:
- Form W-8BEN for foreign individuals certifying foreign status and claiming treaty benefits.
- Form W-8BEN-E for foreign corporations, partnerships, and other entities.
- Form W-8ECI when the recipient claims the income is effectively connected with a U.S. trade or business.
Without a valid W-8 on file, you withhold at 30%.3Internal Revenue Service. About Form W-8 BEN, Certificate of Foreign Status of Beneficial Owner for United States Tax Withholding and Reporting A phone call, an email, or the recipient’s assurance that they qualify for a treaty rate is not enough. This is one of the most common compliance failures the IRS identifies, and it triggers personal liability for the shortfall.
When to Deposit
Withheld tax goes to the U.S. Treasury through the Electronic Federal Tax Payment System (EFTPS). How often depends on how much you have sitting undeposited:
- If your undeposited tax reaches $200 or more at the end of any calendar month, deposit the full amount by the 15th of the following month.6eCFR. 26 CFR 1.6302-2 – Deposit Rules for Tax Withheld on Nonresident Aliens and Foreign Corporations
- If your undeposited tax hits $2,000 or more at the close of any quarter-monthly period, deposit within three business days. Saturdays, Sundays, and legal holidays don’t count.6eCFR. 26 CFR 1.6302-2 – Deposit Rules for Tax Withheld on Nonresident Aliens and Foreign Corporations
- If the total undeposited tax is less than $200 at the end of December, you can deposit it by March 15 of the following year or send it in with Form 1042.6eCFR. 26 CFR 1.6302-2 – Deposit Rules for Tax Withheld on Nonresident Aliens and Foreign Corporations
Agents who process large or frequent payments can hit the $2,000 quarter-monthly threshold without noticing. Track the running balance inside each period, not just at month-end.
Year-End Reporting
Three forms close out the year, and they share a March 15 deadline.
Form 1042
Form 1042, the Annual Withholding Tax Return for U.S. Source Income of Foreign Persons, is the summary. It reports total U.S. source income paid to foreign persons during the year, total tax withheld, and total deposited. It covers both Chapter 3 (NRA) and Chapter 4 (FATCA) withholding.7Internal Revenue Service. About Form 1042, Annual Withholding Tax Return for U.S. Source Income of Foreign Persons
Form 1042-S
Form 1042-S is the recipient-level detail. File a separate 1042-S for each foreign payee and for each type of income; a recipient who got both dividends and royalties gets two forms.8Internal Revenue Service. Instructions for Form 1042 Furnish a copy to the recipient by March 15 as well. A 1042-S is required even when no tax was withheld because a treaty exempted the payment. The IRS wants every reportable payment on the record, not just the taxed ones.
Form 1042-T
Form 1042-T is the transmittal that accompanies paper Forms 1042-S sent to the IRS.8Internal Revenue Service. Instructions for Form 1042 E-filers don’t use it.
Extensions
Filing Form 7004 by March 15 gets you an automatic six-month extension to file Form 1042, pushing the deadline to September 15.9Internal Revenue Service. Instructions for Form 7004 The extension does not extend the time to pay. Estimate what you owe and pay it by March 15 or interest and penalties start running. The extension also does not move the deadlines for filing Forms 1042-S with the IRS or furnishing copies to recipients. Those stay at March 15.
Electronic Filing
Financial institutions must file Form 1042 electronically. Everyone else must file electronically if they are required to file 10 or more information returns during the year, or if they are a partnership with more than 100 partners. The 10-return threshold also applies to Forms 1042-S, and filers use the IRS Filing Information Returns Electronically (FIRE) system.10Internal Revenue Service. Electronic Reporting of Form 1042-S The count sweeps in every information return your organization files, including W-2s and 1099s. Most businesses with any real volume of foreign payments will cross it.
What It Costs to Get It Wrong
Deposit penalties, late-return penalties, and information-return penalties can all hit for the same tax year. They stack.
Late Deposits
The failure-to-deposit penalty is based on how late the deposit is, and only the highest applicable rate applies:
- 1 to 5 calendar days late: 2% of the unpaid deposit.
- 6 to 15 calendar days late: 5%.
- More than 15 calendar days late: 10%.
- More than 10 days after the first IRS notice, or on receipt of a demand for immediate payment: 15%.
The percentages apply to the amount you should have deposited, not the total tax for the period.11Internal Revenue Service. Failure to Deposit Penalty
Late Form 1042
Filing Form 1042 late costs 5% of the unpaid tax for each month or partial month the return is overdue, capped at 25%.12Internal Revenue Service. Failure to File Penalty Deposit everything on time and the penalty base is small even if the return is late. Owe a balance when you finally file and the number climbs quickly.
Incorrect or Late Forms 1042-S
Per-return penalties for failing to file correct Forms 1042-S with the IRS, or failing to furnish correct copies to recipients, for returns due in 2026:13Internal 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 or 10% of the amount required to be reported, whichever is greater, with no cap.
Annual maximums apply for every tier except intentional disregard, and they scale with business size.14Internal Revenue Service. 20.1.7 Information Return Penalties The filing obligation (getting the form to the IRS) and the furnishing obligation (getting a copy to the recipient) are separate, so a single missed 1042-S can generate two penalties.
The Tax Itself
The penalties are not the biggest number. Because every withholding agent is personally liable for tax that should have been withheld regardless of whether it was collected, the underlying 30% is yours to pay if you missed it.1Office of the Law Revision Counsel. 26 U.S. Code 1461 – Liability for Withheld Tax Pay a foreign person $100,000, fail to withhold, and you owe the IRS $30,000 out of your own funds, plus deposit penalties, late-filing penalties, and interest. The recipient has already been paid in full and owes you nothing.