How to Request a W-9 From a Vendor: A Bookkeeper's Pre-1099 Workflow (2026)

It's January 18. Your client owes you a 1099-NEC count by month-end. You pull the vendor list and find 23 contractors paid over $600 last year. You have W-9s on file for 9 of them. The other 14 went straight into the bill-pay queue without anyone collecting a form. Now you're emailing strangers asking for their Tax ID, hoping they reply before the IRS deadline.

This is the workflow you don't want. The fix is upstream. Collect the W-9 before the first payment leaves the bank, not after the calendar year closes. The bookkeeper-first version takes 90 seconds during vendor onboarding and saves 4 to 6 hours every January.

This is how to request a W-9 the right way, what to do when vendors push back, and why the rules just changed for 2026 in ways most templates haven't caught up to yet.

How do I request a W-9 from a vendor?

Request the W-9 before you issue the first payment. Email the vendor IRS Form W-9 (downloadable from irs.gov), ask for it back signed and dated, and store it with the vendor record. Don't release payment until the form arrives. For 2026, the IRS requires a 1099-NEC only on payments totaling $2,000 or more per vendor per year (up from $600), but you still collect the W-9 from every vendor at onboarding because you don't know in advance which ones will cross the threshold. Missing W-9s trigger backup withholding at 24% under IRC §3406 once cumulative payments exceed $2,000. The workflow that works: include the W-9 request in the vendor-setup email, never pay before it's back, and re-collect every three years or when vendor details change.

Key Takeaways

• The 2026 1099-NEC threshold jumped from $600 to $2,000 under OBBBA. Payments after December 31, 2025 only require a 1099-NEC if total annual payments to the vendor hit $2,000. That changes who you file for, not who you collect W-9s from. Collect from everyone. See 1099-NEC vs 1099-MISC for 2026 for which form applies to which payment.
• The 1099-K threshold reverted to $20,000 + 200 transactions for 2026. OBBBA killed the ARPA $600 phase-down retroactive to 2022. Payment processors like Stripe and PayPal won't send vendor 1099-Ks unless they cross both thresholds.
• Backup withholding kicks in at 24% under IRC §3406 when a vendor refuses a W-9 or the TIN doesn't match IRS records once payments cross the new $2,000 reporting threshold. Treasury and the IRS issued proposed regulations updating the §3406 threshold to match the new §6041 reporting threshold.
• Collect W-9 BEFORE first payment, not after. Build it into vendor onboarding. The 90-second collection step at onboarding replaces 4 to 6 hours of January chasing every year.
• Single-member LLCs trip up almost every new vendor. They should list the owner's name on Line 1 and the LLC name on Line 2, with "Individual/sole proprietor" checked, NOT "Limited liability company." Wrong box selection is the #1 reason W-9s come back unusable.
• Foreign vendors don't use W-9 at all. They submit W-8BEN (individual) or W-8BEN-E (entity). U.S.-source income to foreign vendors gets reported on 1042-S, not 1099-NEC. Different form, different deadline, different penalty regime.

Payment reconciliation starts upstream of payment. If you don't have a W-9, you don't have a clean payment record either. Related vendor-workflow terms: vendor credit, bill pay, purchase order. See the full glossary for adjacent definitions.

When to Request a W-9 (Hint: Before the First Dollar Moves)

The textbook answer is "before payments hit $600." That answer is stale. The 2026 answer is "before any payment moves, regardless of dollar amount."

Three reasons:

1. You don't know upfront which vendors will cross the $2,000 threshold. A vendor you pay $400 in March can turn into a $3,800 vendor by November when scope expands. Going back to collect a W-9 in December is harder than collecting it at onboarding.
2. Refusal is easier to handle pre-payment. If a vendor refuses the W-9 before any work starts, you find a different vendor. If they refuse after $1,800 in payments, you're stuck withholding 24% on every future payment under IRC §3406, and you still owe them the underlying invoice.
3. The audit trail is cleaner. A W-9 dated before the first invoice proves your client did due diligence. A W-9 dated three days before the 1099 deadline looks like a scramble (because it is).

The bookkeeper-first rule: vendor doesn't exist in your AP system until the W-9 arrives. No exceptions. If a partner or owner wants to expedite payment, they can sign off in writing that they'll handle the W-9 themselves. They almost never want to do that twice.

Trigger events for a new W-9

You request a W-9 in five situations:

• New vendor onboarding (most common)
• Existing vendor changes entity type (sole prop converts to S-Corp, LLC files Form 8832, partnership reorganizes)
• Existing vendor changes name or TIN (rare, but happens with marriage, divorce, business sale)
• IRS sends a CP2100 or CP2100A "B-Notice" because the TIN you reported didn't match (now you have 30 days)
• Form on file is older than three years and you have no recent business with the vendor

Most firms refresh W-9s every three years as a hygiene practice even when nothing changed. It's cheap and it heads off CP2100 surprises.

How to Request a W-9: The 90-Second Workflow

The actual mechanics. No template gymnastics. No "click here for our secure portal." Just the email you send.

Step 1: Download the current W-9 from irs.gov

The IRS reissues Form W-9 every few years with minor updates. The current version is dated March 2024 (the form Bobby ships with vendor onboarding emails). Always pull from irs.gov/forms-pubs/about-form-w-9 rather than from your client's old archives. Outdated versions can cause processing delays.

Step 2: Send a one-paragraph email with the form attached

Sample text:

Hi [Vendor Name],

Before we can issue your first payment, we need a completed IRS Form W-9 on file. This is standard for U.S. tax reporting. The form is attached. Please complete Lines 1-7, sign and date Part II, and email it back as a PDF.

Note: if you're a single-member LLC, your name goes on Line 1 and the LLC name on Line 2. Check "Individual/sole proprietor" in Part 3, not "Limited liability company."

Once we have the signed form, we'll release the payment within 5 business days.

Thanks, [Your Name]

This works because it does three things at once: it explains why you need the form, it pre-empts the most common error (LLC box confusion), and it ties the W-9 to payment timing so the vendor has a reason to act.

Step 3: Store the W-9 with the vendor record

When the signed PDF arrives, file it with the vendor in your AP system. QBO has a vendor attachment field. Xero has a similar slot. If you use a bill-pay tool like Bill.com or Melio, attach the W-9 to the vendor profile there as well so anyone running a payment can verify it's on file.

Some firms keep a parallel folder in SharePoint or Google Drive organized by vendor name. Belt and suspenders. The IRS retention rule is four years from the date of the related return filing, but most firms keep W-9s for the life of the vendor relationship plus three years.

Step 4: Mark the vendor as W-9-on-file

Tag the vendor in your AP system. "W-9 on file" or "Cleared for payment" or whatever flag your tool supports. The flag matters because at payment time, the AP clerk or bill-pay operator can check at a glance whether the vendor is cleared. No flag, no payment.

This is the entire workflow. 90 seconds at onboarding, plus the wait for the vendor to email it back. Everything else is the same January cleanup work bookkeepers have always done, just collapsed into an upfront step.

The 2026 Threshold Changes That Matter

If you author or maintain vendor-onboarding templates, the OBBBA changes need to land before 1099 season. Three threshold shifts:

1099-NEC threshold: $600 → $2,000

The One Big Beautiful Bill, signed July 4, 2025, increased the IRC §6041(a) threshold from $600 to $2,000 for payments made after December 31, 2025. The IRS Notice 2025-62 confirms the change applies to the 1099-NEC and 1099-MISC forms you'll file in January 2027 for the 2026 tax year.

What this changes for your workflow: you file fewer 1099-NEC forms in 2027 than in prior years. A contractor paid $1,800 in 2026 doesn't need a 1099-NEC. The same contractor paid $1,800 in 2024 did.

What this does NOT change: you still collect a W-9 from every U.S. vendor at onboarding. Threshold is for filing, not for collection. You don't know who will cross the line in advance.

1099-K threshold: reverted to $20,000 AND 200 transactions

The American Rescue Plan Act of 2021 dropped the 1099-K threshold from $20,000 + 200 transactions to $600 with no transaction floor. OBBBA repealed that change retroactive to 2022. For 2026 (and back through 2022), third-party payment processors like Stripe, PayPal, Venmo Business, and Square only issue 1099-K when a payee crosses both $20,000 in gross payments AND 200 transactions.

For most bookkeeping clients, this means your vendors who get paid through Stripe Connect, Venmo Business, or PayPal won't receive 1099-Ks unless they're high-volume. That puts the reporting burden back on you (the payer issuing 1099-NEC) and back on the recipient (who has to track their own income without a third-party form arriving).

Backup withholding rate stays 24%

The §3406 backup withholding rate didn't change. It's still 24% of gross payments. What changed is when it triggers. Treasury and the IRS issued proposed regulations matching the §3406 threshold to the new §6041 reporting threshold of $2,000. The rule: if you've paid a vendor $2,000 or more cumulatively in the year and they haven't provided a valid TIN, you must withhold 24% of every subsequent payment and remit it to the IRS.

In practice, this almost never happens for bookkeepers who run the upstream W-9 workflow. Backup withholding is the cleanup tool for vendors who slipped past the gate.

When a Vendor Refuses or Stalls

Three common scenarios. Each has a clean answer.

Scenario 1: Vendor asks "why do you need this?"

Most common with first-time freelancers or contractors who haven't dealt with U.S. tax reporting before. The answer:

"Federal law requires us to collect your Tax ID before paying you for services. We file a 1099 with the IRS at year-end if your total payments cross $2,000. Without the W-9 we'd have to withhold 24% of every payment, which would slow your cash flow."

Most vendors comply within a day after this email. The phrase "24% withholding" does most of the work.

Scenario 2: Vendor sends an incomplete or wrong form

Top three errors, in order of frequency:

• Single-member LLC checks the "Limited liability company" box. Wrong. Single-member LLC defaults to disregarded entity status, which means the OWNER files taxes. The owner's name goes on Line 1, the LLC name on Line 2, and the "Individual/sole proprietor" box gets checked. The LLC box is for multi-member LLCs that elected partnership or corporate taxation via Form 8832 or 2553.
• TIN field blank or partially filled. The W-9 needs either SSN or EIN, not both. Individuals provide SSN. Single-member LLCs use the owner's SSN unless the LLC has an EIN for employment tax purposes. Entities (partnerships, corporations, multi-member LLCs taxed as partnerships) use EIN.
• No signature in Part II. The certification block requires a wet or electronic signature and date. An unsigned W-9 is invalid. Send it back.

Don't fix the form for the vendor. Send it back with a short note pointing to the field that needs correction. They re-sign and re-send.

Scenario 3: Vendor flat-out refuses

Rare but it happens. Usually a foreign vendor who shouldn't be on a W-9 (see next section) or a domestic vendor who claims to be exempt (most aren't).

The bookkeeper-side answer: don't release payment without the form. If the work is already done and the invoice is owed, the client has two choices: pay the invoice and start backup withholding at 24% per IRC §3406 once cumulative payments cross $2,000, or pay through a system that issues 1099-K (Stripe, PayPal, etc.) so the reporting burden shifts to the third party. Neither is great. The cleanest answer is to head this off at onboarding.

W-9 vs W-8BEN: The Foreign Vendor Trap

Foreign vendors never go on a W-9. The form is U.S.-only. If a vendor is a non-U.S. person (individual or entity), you collect a different form:

• W-8BEN for foreign individuals (sole proprietors abroad, freelancers in another country)
• W-8BEN-E for foreign entities (a UK Ltd, a Singapore Pte Ltd, a German GmbH)

Two consequences flow from this:

1. Reporting form changes. Payments to foreign vendors for U.S.-source income get reported on Form 1042-S, not 1099-NEC. The deadline is March 15 of the following year (not January 31), and the penalty regime is harsher.
2. Withholding rules are different. Under IRC §1441, U.S.-source income to foreign payees can require 30% withholding unless a tax treaty reduces the rate. The W-8BEN documents the vendor's eligibility for treaty rates.

If a U.S. firm pays a German graphic designer $5,000 for design work performed in Germany, the work is foreign-source and no 1099 or 1042-S applies. If the same designer flies to New York and does the work onsite, it's U.S.-source and 1042-S applies. The location of the work, not the location of the vendor, determines source.

Most bookkeepers handle one or two foreign vendors per client (if any). When they appear, flag the engagement-letter conversation: foreign vendor work is outside scope for many CPA firms, and the international tax complexity warrants either a specialist referral or a scope expansion.

Audit Trail: What an IRS Exam Wants to See

If your client gets a 1099 audit, the examiner will ask for three things per vendor on the 1099 list:

1. Signed W-9 with TIN matching the 1099 reported
2. Bills or invoices supporting payments included in the 1099 total
3. Proof of payment (bank statement showing the check cleared or ACH posted)

Missing any of those three, and the examiner can disallow the deduction or impose a $340 per-form penalty (2026 amount filed after August 1 or never filed, indexed annually under IRC §6721). The penalty doubles to $680 per form if the failure is willful (intentional disregard, no cap). On a 20-vendor list, that's $6,800 to $13,600 in penalties before professional fees. See the full 1099 filing deadline and penalty schedule for the $60/$130/$340/$680 tiered breakdown.

The pre-payment W-9 collection workflow makes the audit trail automatic. Every payment in your AP system has a W-9 attached at the vendor level. The 1099 list maps directly to the W-9 list. The audit reduces to printing the documentation.

Where firms get hurt is the "well, we paid this guy $4,200 but his W-9 never came in, so we didn't issue a 1099" answer. The examiner doesn't care that the W-9 didn't come in. The firm should have withheld 24% or stopped paying. Now there's a 1099 that should have been filed but wasn't, and a backup-withholding obligation that wasn't met. Two penalties from one missing form.

How Growthy Handles 1099 Vendor Tracking

Growthy categorizes vendor payments automatically. You review and approve. When a vendor crosses the $2,000 threshold during the year, Growthy flags the vendor in the AP queue and shows whether a W-9 is on file. If the W-9 is missing, the flag escalates: you can release the payment, but you'll see the missing-W-9 warning every time so it doesn't fall through the cracks.

At year-end, Growthy generates a 1099 candidate list ranked by total payments and W-9 status. Vendors with payments over $2,000 and W-9 on file go straight to the 1099 export. Vendors with payments over $2,000 and no W-9 show up at the top of the cleanup list with the dollar amount and the count of payments. That's the "you have 6 days, here are the 4 vendors who need W-9s now" view.

Built by a CPA firm partner who still reconciles books for real clients. 85% accurate on first import. Climbs to 90%+ as Growthy learns each client's vendor patterns over the first 30 days.

FAQ

Do I need a W-9 from a vendor I paid $1,500 in 2026?

Under the new OBBBA rules, you don't need to file a 1099-NEC for a vendor paid less than $2,000. But you should still collect the W-9 at onboarding. You don't know in March whether a vendor will hit $2,000 by December, and going back to collect a form after payments have already moved is harder than collecting it before the first one.

What if the vendor's W-9 has the wrong TIN?

The IRS sends a CP2100 or CP2100A "B-Notice" when a TIN on a 1099 doesn't match their records. You have 30 days to send the vendor a second W-9 request (the "B-Notice solicitation"). If the vendor doesn't respond within 30 days, backup withholding at 24% begins on the next payment under IRC §3406. Document the solicitation in writing because that record is what protects the firm from a penalty if the IRS comes back.

How long should I keep W-9s on file?

The IRS retention rule is four years from the date of the related return filing under IRC §6501. Most firms keep W-9s longer, for the life of the vendor relationship plus three years. Cloud accounting systems make this nearly free; the harder discipline is not deleting old vendor records.

Can a vendor send the W-9 by email or does it need to be mail?

Email is fine. The IRS accepts electronic W-9s as long as the certification and signature are clear (typed name on the signature line works, per IRS guidance on electronic substitutes). Most firms now collect by email or via a vendor portal in their AP system.

Does the W-9 expire?

The W-9 itself doesn't have an IRS expiration date. The form is valid until the vendor's information changes (name, TIN, entity type) or until the IRS issues a CP2100 saying the TIN doesn't match. Most firms refresh W-9s every three years as a hygiene practice.

Should I use IRS TIN matching before filing 1099s?

Yes. The IRS offers free TIN Matching at irs.gov/tin-matching. Run vendor TINs through it before submitting the 1099 batch in January. Matches that fail give you 30 days to chase the vendor for a corrected W-9 before filing, which avoids CP2100 notices later. This is the single highest-ROI 1099-season prep task most firms skip.

What's the difference between a W-9 and a 1099?

A W-9 is the form a vendor provides to your client (the payer) at onboarding. It contains the vendor's name, address, TIN, and tax classification. A 1099-NEC (or 1099-MISC) is the form your client issues to the vendor at year-end reporting total payments. The W-9 is input. The 1099 is output. You can't issue a clean 1099 without a clean W-9 on file.

The Upstream Habit That Saves January

Most of the 1099-season pain bookkeepers feel in January comes from work that should have been done in March, June, and September. The W-9 collection step takes 90 seconds at vendor onboarding. The January cleanup for a vendor who slipped past the gate takes 30 to 90 minutes per vendor (emails, phone calls, late-night re-issued forms, occasional backup withholding setup). Multiply by 14 vendors and that's a full workday gone.

The fix is procedural, not technical. Add a "W-9 on file" gate to your vendor onboarding workflow. Tag vendors in your AP system. Tell the team: no W-9, no payment. Most firms hit 95%+ compliance within a quarter of putting this in place.

If you're tired of chasing W-9s in January, start with Growthy free. Built by a CPA firm partner who still reconciles books for real clients. Vendor flags surface at payment time. 1099 candidate lists ranked by dollar and W-9 status. Done in a morning, not a week.

Tax figures verified against IRS Notice 2025-62, IRS 1099-K FAQs, and §3406 proposed regulations on 2026-05-14. The $2,000 1099-NEC threshold and reverted $20,000 + 200 transaction 1099-K threshold apply to payments made on or after January 1, 2026.