Paying International Contractors: W-8 Forms and 1042-S Reporting

When a US business pays international contractors, the domestic 1099-NEC does not apply. Compensation paid to a nonresident alien or foreign entity is reported on Form 1042-S instead, and the payer generally must withhold 30% of any US-sourced payment unless a tax treaty reduces or eliminates that rate.¹ Whether any US withholding or reporting applies at all comes down to one question: where the contractor physically performs the work.

Where the Work Is Performed Decides Everything

For personal services, the IRS sources income based on the physical location where the work happens, not where the contractor lives or where you send payment.² That single fact splits foreign contractors into two very different compliance paths.

All Work Performed Outside the United States

When a foreign contractor does all their work from another country, the income is foreign-sourced. Foreign-sourced income paid to a foreign person is generally not subject to US withholding or information reporting. You pay the full contracted amount, withhold nothing, and file no Form 1042-S. You should still collect a Form W-8BEN to document the contractor’s foreign status, but the payment itself creates no US tax event.

This is the situation most US businesses with remote overseas contractors fall into. The exemption depends entirely on the contractor never setting foot in the US to perform any of the contracted work.

Any Work Performed Inside the United States

If the contractor performs any part of the services while physically in the US, that portion becomes US-sourced. US-sourced income paid to a foreign person triggers withholding and reporting you cannot ignore. You need to determine what share of the total contract corresponds to work done on US soil and apply the withholding rules to that amount.

Say you pay a foreign contractor $10,000 and they spend one week working at your office in the US out of a ten-week project. Roughly $1,000 would be US-sourced, subject to withholding and reportable on Form 1042-S. The remaining $9,000 stays foreign-sourced and typically carries no US tax obligation. Getting an accurate breakdown of where work was performed is your responsibility as the payer, so build that tracking into the contract from the start.

Forms You Collect From the Contractor

The form you request is not a W-9. Form W-9 is reserved for US persons, including US citizens, resident aliens, and domestic entities.³ Foreign contractors provide a form from the W-8 series, and which one depends on whether you are dealing with an individual or an entity.

Form W-8BEN for Individuals

A nonresident alien individual provides Form W-8BEN to certify foreign status.⁴ The form collects the contractor’s name, permanent address, country of citizenship, and either a foreign tax identification number or a US Individual Taxpayer Identification Number (ITIN). A contractor claiming treaty benefits for non-services income like royalties or dividends can do so on Form W-8BEN itself, but must provide either a foreign TIN or an ITIN. Without one of those numbers, the treaty claim is invalid and you must withhold at the full 30%.⁵

A completed W-8BEN stays valid from the date of signing through the last day of the third calendar year that follows. A form signed in June 2026 remains good through December 31, 2029. If anything on the form changes before that expiration, the contractor must send an updated version.⁵

Form W-8BEN-E for Entities

When your contractor is a foreign corporation, partnership, or other entity, the equivalent form is W-8BEN-E.⁴ It is considerably more complex because the entity must also declare its status under FATCA. Most independent contracting firms are not financial institutions and will classify themselves as an active or passive non-financial foreign entity, which is the simpler path through the form.

Form 8233 for Treaty Exemptions on Services

Here is the point that trips up most payers. When a nonresident alien contractor wants to claim a tax treaty exemption on compensation for personal services performed in the US, the correct form is Form 8233, not the W-8BEN.⁶ IRS Publication 515 is explicit: “Independent nonresident alien contractors use Form 8233 to claim an exemption from withholding under a tax treaty.”⁷

The W-8BEN establishes foreign status and covers treaty claims on passive income. Services income follows a different channel. If your contractor resides in a treaty country and qualifies for an exemption on independent personal services, they submit Form 8233 directly to you, and you forward a copy to the IRS. Until you hold a valid Form 8233, withhold at 30% regardless of any treaty the contractor believes applies.

What Happens Without a Valid Form

If you do not have a valid W-8 (or Form 8233, where applicable) at the time of payment, you must treat the contractor as undocumented and withhold at the full 30% statutory rate on all US-sourced payments.⁸ There is no grace period. The withholding obligation attaches at the moment you make the payment, and you cannot retroactively fix the problem by collecting paperwork afterward.

The 30% Withholding and Treaty Rates

Federal law requires anyone paying US-sourced income to a nonresident alien to withhold tax equal to 30% of the gross payment.⁹ You deduct it from the payment and send it to the US Treasury. On a $5,000 US-sourced payment, you send the contractor $3,500 and deposit $1,500 with the IRS.

Many US tax treaties reduce or eliminate this rate on independent personal services income, and the terms vary by country. Some treaties exempt services income entirely if the contractor keeps no permanent establishment in the US and stays under 183 days. Others reduce the rate without eliminating it.⁷ Do not apply a reduced rate until you hold a valid, completed Form 8233 from the contractor.

Depositing Withheld Tax

Deposits must be made electronically through EFTPS or IRS Direct Pay. Failing to deposit electronically can trigger a 10% penalty on its own.¹⁰ How quickly you must deposit depends on the amount:

$2,000 or more accumulated: deposit within 3 business days after the end of the quarter-monthly period in which the threshold was reached. Quarter-monthly periods end on the 7th, 15th, 22nd, and last day of each month.
$200 to $1,999 at month’s end: deposit within 15 days after the end of the month.
Under $200 at year’s end: pay the balance with Form 1042 by March 15 of the following year, or deposit it by then.¹¹

Most businesses paying one or two foreign contractors fall into the lower tiers. If you make large or frequent payments, the 3-business-day rule can sneak up quickly.

Year-End Reporting: Forms 1042-S and 1042

Compensation paid to nonresident aliens is reported on Form 1042-S, not the 1099-NEC used for domestic contractors.¹ You prepare a separate 1042-S for each foreign contractor who received US-sourced income during the year, reporting the gross amount paid, the tax withheld, and the basis for any treaty-based exemption. Provide a copy to the contractor and file a copy with the IRS by March 15 of the following year. A 1042-S is required even when no tax was withheld because a treaty eliminated the obligation.¹²

Form 1042 is the annual summary that reconciles everything: total US-sourced income paid to all foreign persons, total tax required to be withheld, and total actually deposited. The totals on Form 1042 must match the combined totals of all your Forms 1042-S. Form 1042 is also due March 15.¹

If you file 10 or more information returns of any type during the calendar year, you must e-file your Forms 1042-S.¹³ That threshold dropped from 250 to 10 starting in 2024 and catches many more small businesses than the old rule did. Beginning with 2026 Forms 1042-S (due March 15, 2027), the IRS requires use of the Information Returns Intake System (IRIS) for electronic filing.¹²

Penalties

The penalty structure hits from multiple directions at once. Late filing of Form 1042-S is tiered by how late you are:

Within 30 days of the deadline: $60 per form, up to $698,500 per year ($244,500 for small businesses).
More than 30 days late but by August 1: $130 per form, up to $2,095,500 per year ($698,500 for small businesses).
After August 1 or not filed at all: $340 per form, up to $4,191,500 per year ($1,397,000 for small businesses).
Intentional disregard: $690 per form or 10% of the total reportable amount, whichever is greater, with no annual cap.¹²

A separate penalty applies for failing to furnish the correct Form 1042-S to the contractor by March 15. That penalty is $310 per failure for the 2024 filing year, with higher amounts for intentional disregard.¹⁴

The bigger risk is failing to withhold in the first place. As a withholding agent you are personally liable for tax you were required to withhold but didn’t. If you pay a foreign contractor $10,000 for US-sourced work and skip the $3,000 withholding, the IRS can collect that $3,000 from you. The contractor already has the money and may be unreachable in another country. You cannot recover it from a future payment once the engagement has ended.

Officers or responsible persons within a business who willfully fail to collect and remit withheld taxes face a trust fund recovery penalty equal to the full unremitted amount.¹⁵ That penalty attaches to the individual, not just the business.

Before You Apply Any of This: Confirm the Worker Is Really a Contractor

These rules assume a legitimate independent contractor relationship. The IRS uses a common-law test looking at behavioral control, financial control, and the nature of the relationship to decide whether a worker is really an employee.¹⁶ Misclassifying a foreign worker as a contractor when they are functionally an employee pulls you into international payroll withholding and back payroll taxes, an entirely different compliance framework from the one described here.

When a 1099-NEC Actually Applies

The 1042-S framework applies only to foreign persons. If your overseas contractor is a US citizen or a resident alien living abroad, they are a US person for tax purposes. The standard domestic rules then apply: you collect Form W-9, and if you pay them $600 or more during the year for services, you issue a 1099-NEC.³ No 30% withholding, no 1042-S, and the sourcing rules for foreign persons don’t matter.

The distinction turns on tax status, not geography. A US citizen working from Berlin is still a US person. A Canadian citizen working from Toronto is a foreign person. A Canadian citizen who has spent enough time in the US to meet the substantial presence test may qualify as a resident alien and becomes a US person again. When you are unsure, the W-8BEN and W-9 forms themselves are designed to sort it out. Ask the contractor to complete whichever form matches their status, and let the answer route the rest of the paperwork.

1
Internal Revenue Service. Reporting Payments to Independent Contractors
2
Internal Revenue Service. Source of Income – Personal Service Income
3
Internal Revenue Service. Instructions for the Requester of Form W-9 (Rev. March 2024)
4
Internal Revenue Service. About Form W-8 BEN, Certificate of Foreign Status of Beneficial Owner for United States Tax Withholding and Reporting (Individuals)
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Internal Revenue Service. Instructions for Form W-8BEN (Rev. October 2021)
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Internal Revenue Service. About Form 8233, Exemption From Withholding on Compensation for Independent (and Certain Dependent) Personal Services of a Nonresident Alien Individual
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Internal Revenue Service. Publication 515 (2026), Withholding of Tax on Nonresident Aliens and Foreign Entities
8
Internal Revenue Service. NRA Withholding
9
Office of the Law Revision Counsel. 26 USC 1441 – Withholding of Tax on Nonresident Aliens
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Internal Revenue Service. EFTPS: The Electronic Federal Tax Payment System
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Internal Revenue Service. Instructions for Form 1042 (2025)
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Internal Revenue Service. Instructions for Form 1042-S
13
Internal Revenue Service. Topic No. 801, Who Must File Information Returns Electronically
14
Internal Revenue Service. Penalties Related to Form 1042-S
15
Office of the Law Revision Counsel. 26 USC 6672 – Failure to Collect and Pay Over Tax, or Attempt
16
Internal Revenue Service. Employee (Common-Law Employee)