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.
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Put this into a monitored workflow
W-9 Collector handles this continuously — with reminders and an audit trail.