Skip to content
Keelstar

Guide

How to Collect W-9 from International Vendors

By Keelstar Team · Updated July 11, 2026

The short answer

International vendors do not automatically complete Form W-9. U.S. persons and U.S. entities use W-9; foreign persons use the W-8 series. Before requesting any form, determine whether the vendor is a U.S. person for tax purposes — U.S. citizens, green card holders, and entities formed under U.S. law file W-9 even if they operate abroad. Foreign individuals and entities file W-8BEN or W-8BEN-E. Requesting the wrong form wastes time and creates compliance gaps. Document your determination and store the correct form before making cross-border payments.

Determine U.S. person status first

Before sending a W-9 request to an international vendor, ask: is this payee a U.S. person under IRS rules? U.S. citizens, resident aliens, and entities organized under U.S. law (including U.S. LLCs and corporations) are U.S. persons — they complete W-9 regardless of where they perform work. Foreign individuals and foreign entities complete W-8 forms.

When international vendors use W-9

Common W-9 scenarios with international flavor: a U.S. citizen freelancer living abroad, a U.S.-formed LLC with a foreign owner (disregarded or corporate), or a U.S. branch of a foreign company billing as a U.S. entity. The W-9 certification includes a statement that the payee is a U.S. person — review it carefully for cross-border vendors.

When to request W-8 instead

Foreign individuals provide Form W-8BEN. Foreign entities provide Form W-8BEN-E. These forms certify foreign status and may claim treaty benefits reducing or eliminating U.S. withholding on certain U.S.-source income. Do not accept a W-9 from a vendor who certifies foreign status — the forms serve different purposes.

Cross-border payment and withholding considerations

Payments to foreign vendors may trigger U.S. withholding on U.S.-source income depending on payment type and treaty provisions. The W-8 series documents foreign status and any treaty claim. W-9 establishes U.S. person status and TIN for domestic reporting. Coordinate with your tax team on withholding rules — AP should not guess.

  • U.S. person → W-9, domestic 1099 rules apply
  • Foreign person → W-8, evaluate withholding and reporting
  • Hybrid structures → tax team review before first payment
  • Document determination in vendor record

Practical onboarding for international vendors

Add a 'U.S. person status' question to your vendor intake form. Route affirmative answers to W-9 collection; negative answers to W-8 collection with tax team review. Include the question in your vendor portal — do not rely on AP to infer status from a foreign mailing address.

Avoid common cross-border mistakes

Teams sometimes accept W-9s from foreign entities to 'keep things simple,' or request W-8 from U.S. LLCs because the owner lives overseas. Both errors create filing and withholding exposure. Train procurement to flag international vendors for tax review at setup, not at year-end.

Frequently asked questions

Does a foreign company ever complete a W-9?
A foreign company that is not a U.S. person uses W-8BEN-E, not W-9. However, a U.S. subsidiary or U.S.-formed LLC owned by foreign parents is a U.S. person and completes W-9. Entity formation jurisdiction matters — not where the vendor operates day to day.
What if a vendor with a foreign address sends a W-9?
A foreign address alone does not disqualify W-9 use. U.S. citizens abroad and U.S. entities with overseas offices may legitimately complete W-9. Verify U.S. person status — do not reject a valid W-9 solely because the address is outside the U.S.
Do we need tax forms for small international software subscriptions?
Payment type and amount matter. Many routine business purchases to foreign vendors do not require W-8 if no U.S.-source income withholding applies — but your tax advisor should confirm. Document the determination for audit purposes.
How long is a W-8 valid compared to a W-9?
W-8 forms generally expire after three calendar years from the signature date, or when the vendor's circumstances change. W-9s do not expire by statute but should be refreshed on entity changes or your internal policy schedule.

Related guides

Put this into a monitored workflow

W-9 Collector handles this continuously — with reminders and an audit trail.