How to Ask a Vendor for a W-9 by Email: 7 Templates

The moment to ask for a W-9 is before the first check goes out, not after you've already paid a vendor and are trying to file 1099s in January with three forms missing. The templates below cover that first ask, the pre-payment hold, the year-end chase, the foreign-vendor variant, and the vendor who just won't send one back.

Each one is ready to paste. Swap the bracketed fields — [VENDOR NAME], [DEADLINE], [SECURE UPLOAD LINK] — and send.

When to send this#

Send the W-9 request as part of vendor setup, before the first invoice is approved for payment — not after. A vendor who's already been paid has less reason to reply quickly, and you're now the one chasing a form you needed on file from day one.

The general rule: any US-based individual or unincorporated business you'll pay $600 or more to in a calendar year for services needs a W-9 on file, so you can issue a 1099-NEC at year end. Corporations (S-corp, C-corp) are usually exempt, but the W-9 itself is what tells you that — box 3 states the vendor's tax classification. Don't guess; ask.

If the vendor is outside the US, they don't fill out a W-9 at all. They need a W-8BEN (individual) or W-8BEN-E (entity) instead — see the foreign-vendor template below.

• New vendor, before the first invoice is approved
• Existing vendor with no W-9 on file, discovered during a payables audit
• Vendor whose business structure may have changed (sole prop → LLC, etc.)
• Year-end, for any vendor paid $600+ with a missing or incomplete form

What a good W-9 request contains#

A W-9 request email works when it's specific about why you're asking, what you need back, and by when — vague requests get filed under "later" and forgotten.

The templates#

Seven templates below, in the order you'll actually need them: the first ask, the pre-payment hold, the year-end chase, the two international variants, the secure-transmission note, and the no-response follow-up.

1. 1

   1. First W-9 request (new vendor)

   Subject: W-9 needed before we can process payment Hi [VENDOR NAME], Before we can set you up in our payment system, we need a completed Form W-9 on file. This is standard for every vendor we pay $600 or more per year — it's what lets us issue an accurate 1099-NEC at year end and doesn't affect your payment timeline once it's in. You can download the blank form directly from the IRS: https://www.irs.gov/forms-pubs/about-form-w-9 Please return the completed form through [SECURE UPLOAD LINK] rather than as an email attachment, since it includes your SSN or EIN. We'd need this by [DEADLINE] to keep your first invoice on schedule. Let me know if you have any questions. [YOUR NAME]

2. 2

   2. Pre-payment hold (invoice received, no W-9 yet)

   Subject: Invoice [NUMBER] on hold — W-9 still needed Hi [VENDOR NAME], We've received invoice [NUMBER] and it's ready to go once we have your completed W-9 on file — we don't have record of receiving one yet. We can't release payment until it's in, so this is the one thing standing between you and the check. Form: https://www.irs.gov/forms-pubs/about-form-w-9 Return it here: [SECURE UPLOAD LINK] If we have this by [DEADLINE], the invoice stays on our normal payment schedule. Thanks for getting it back to us quickly. [YOUR NAME]

3. 3

   3. Year-end 1099 chase (vendor already paid, form missing)

   Subject: W-9 needed for 2026 1099 filing Hi [VENDOR NAME], As we prepare 1099-NEC forms for the 2026 tax year, we noticed we don't have a completed W-9 on file for your business, even though we've processed payments to you this year. We're required to have this before we file, so we need it back by [DEADLINE] — that's the IRS filing deadline for us, not a flexible internal one. Form: https://www.irs.gov/forms-pubs/about-form-w-9 Secure return: [SECURE UPLOAD LINK] If your business structure has changed since we started working together (for example, sole proprietor to LLC), please note that on the form — it affects your tax classification in box 3. Thanks for turning this around quickly. [YOUR NAME]

4. 4

   4. Foreign vendor — W-8BEN request (individual)

   Subject: Tax form needed — W-8BEN, not W-9 Hi [VENDOR NAME], Since you're based outside the US, you don't need to complete a W-9 — that form is for US persons only. Instead, we need a completed Form W-8BEN on file to document your foreign status for our records. Form: https://www.irs.gov/forms-pubs/about-form-w-8-ben Please return it through [SECURE UPLOAD LINK] by [DEADLINE]. If your business is incorporated rather than an individual, let us know and we'll send the entity version (W-8BEN-E) instead. We're not able to advise on how tax treaty benefits apply to your specific situation — your accountant or the form's instructions cover that. [YOUR NAME]

5. 5

   5. Foreign vendor — W-8BEN-E request (entity)

   Subject: Tax form needed — W-8BEN-E for [COMPANY NAME] Hi [VENDOR NAME], As a non-US entity, [COMPANY NAME] needs a completed Form W-8BEN-E on file rather than a W-9, which only applies to US taxpayers. Form: https://www.irs.gov/forms-pubs/about-form-w-8-ben-e This form is longer than the individual version and asks about your entity's classification under FATCA — if you're unsure which category applies, that's a question for your accountant or tax counsel, not something we can advise on. Please return it via [SECURE UPLOAD LINK] by [DEADLINE]. [YOUR NAME]

6. 6

   6. Secure-transmission note (any of the above, added when a vendor replies by attaching the form to email)

   Subject: Re: [PREVIOUS SUBJECT] — one change on how to send this Hi [VENDOR NAME], Thanks for filling this out. One request: since the form includes your SSN or EIN, could you upload it through [SECURE UPLOAD LINK] instead of sending it as an email attachment? Standard email isn't the right channel for that kind of information, and we'd rather protect it properly on both ends. If you've already sent it by email, no need to resend anything else — just use the secure link for this one, and we'll delete the email attachment on our side once we've confirmed receipt through the portal. [YOUR NAME]

7. 7

   7. No response after the deadline

   Subject: Following up — W-9 still needed for invoice [NUMBER] Hi [VENDOR NAME], Following up on my note from [DATE] — we still don't have your completed W-9, and it's holding up invoice [NUMBER]. We understand things get missed, so this is just a nudge. Form: https://www.irs.gov/forms-pubs/about-form-w-9 Secure return: [SECURE UPLOAD LINK] If we don't have this by [DEADLINE], we may need to apply backup withholding on the payment per IRS rules — we'd rather not do that, and getting the form back avoids it entirely. Happy to hop on a quick call if something's unclear. [YOUR NAME]

The hard version: a vendor who has already invoiced and refuses to send a W-9#

Occasionally a vendor pushes back outright — they don't want to give out their SSN, they say they'll "send it later," or they simply stop responding once the request goes out. This is the situation the templates above are built to prevent, but it still happens.

The mechanism to understand: if you pay a US vendor who is required to provide a W-9 and they don't, the IRS can require you to withhold 24% of the payment as backup withholding and remit it directly, rather than paying the vendor in full. This isn't a penalty on you for asking — it's the consequence of paying someone without a valid taxpayer ID on file. It's also not something to threaten lightly or explain in more depth than your own knowledge covers.

Describe the consequence in general terms, as template 7 does, and point the vendor to the IRS's own instructions rather than trying to interpret backup withholding rules yourself. If a vendor genuinely refuses after that, that's a conversation for your accountant or bookkeeper, not something to resolve by rewording the email again.

What to do if there's no reply#

If template 7 doesn't get a response within a few business days, escalate the channel before you escalate the tone. A phone call or a message through whatever tool the vendor actually checks often works when a third email in the same thread doesn't.

If the vendor is unresponsive and the payment is time-sensitive, the safest position is to hold the payment rather than release it without a W-9 on file — paying first and chasing paperwork after is how vendors end up missing from your 1099 filing in January. Document each attempt (dates, method) in case you do need to apply backup withholding later.

Where AI Emaily fits#

Chasing a W-9 rarely takes one email — it's the first ask, the pre-payment hold, and sometimes the no-response follow-up, spread across different vendors on different schedules. AI Emaily's reply templates store this exact sequence once, with your bracketed fields ready to fill, so sending it is a couple of clicks instead of retyping the same request every time a new vendor onboards.

It also tracks which threads are still waiting on a reply, so a vendor who's gone quiet on a W-9 request doesn't quietly fall off your radar until year-end filing forces the issue. We build AI Emaily, and this kind of repeatable, low-drama email is exactly the case it's built for — not a replacement for your accountant on anything withholding-related.