W-8BEN and Foreign Contractor Withholding: What to Know

For personal services, source generally follows where the work was physically performed, not the contractor's citizenship, residence, or where your company is located. A foreign contractor who does all their work from outside the United States is generally earning foreign-source income on those services, which isn't subject to U.S. withholding at all, regardless of how the invoice is denominated or which currency you pay in. This is the piece that trips up companies in both directions: some withhold on payments that were never U.S.-source to begin with, and others skip withholding on a contractor who did spend meaningful time working physically inside the U.S.

For example, a company pays a designer based abroad who does all the work from their home country, and separately pays a consultant who spends a month working on site in the United States. The first payment is generally foreign-source and needs no U.S. withholding, while the second may include U.S.-source income that does. Collecting the same form from both and applying one blanket rule to both is the common mistake. The fix is a short intake question about where each stretch of work will physically happen, recorded alongside the form, so the source determination is documented before the first invoice arrives.

A W-8BEN, for an individual, or a W-8BEN-E, for an entity, certifies the payee's foreign status and, where a tax treaty applies, can support a reduced withholding rate on U.S.-source income instead of the default rate. Collecting the form doesn't itself create a withholding obligation where none exists; it's the documentation that supports your position on foreign status and any treaty claim if the payment does turn out to be U.S.-source, or if you're ever asked to justify why you didn't withhold on a foreign payee at all. Keep the underlying form on file, not just a checkbox in your vendor system noting that one was received.

A W-8BEN generally remains valid through the end of the third calendar year after the year it was signed, unless the contractor's circumstances change in a way that makes the form inaccurate before then, a change in residency or citizenship, for instance. Tracking expiration dates across a roster of foreign contractors matters: a form that expired two years ago and was never refreshed leaves you without current documentation exactly when you might need it most.

A mismatch between the amounts reported on your Form 1042 and the Forms 1042-S issued to individual foreign payees can draw IRS attention, since that reconciliation is straightforward to check. So can a pattern of paying foreign contractors with no withholding and no W-8 forms on file at all, which can look like an oversight or like the foreign-source income analysis was never actually performed. Neither pattern by itself proves noncompliance, but both are the kind of thing that turns a routine review into a longer one, especially once a reviewer notices the same gap repeated across several contractors rather than a single isolated file.

Collect a W-8BEN or W-8BEN-E before the first payment to any foreign contractor, the same discipline you'd apply to a domestic W-9, and note where the work will actually be performed as part of that intake, since that's the fact that determines source, not the form itself. Track expiration dates on a schedule rather than discovering a stale form during an audit, and document your source-of-income determination for any contractor doing meaningful work physically inside the U.S., since that's the case where withholding actually does apply and where the documentation matters most. Revisit that determination if a contractor's working arrangement changes, someone who used to work entirely remotely from abroad but now spends part of the year on-site in the U.S. has effectively changed their own facts, even if nobody updates the paperwork to reflect it.

Use this intake and monitoring routine for every foreign contractor:

1. Collect a W-8BEN or W-8BEN-E before the first payment, the same discipline you'd apply to a domestic contractor's W-9.
2. Record where the work will physically be performed, since that fact, not the form, determines the source of the income.
3. Track each form's expiration date on a schedule so a stale form doesn't surface during an audit.
4. Document a source-of-income determination for any contractor doing meaningful work physically inside the U.S., where withholding actually applies.
5. Reconcile your Form 1042 totals to the Forms 1042-S issued to individual foreign payees.