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Form W-9 Checklist: Vendor Tax Information Request

Accounts Payable and Accounting Resource

Streamline Form W-9 (Request for Taxpayer Identification Number and Certification) collection and tracking with our comprehensive checklist. For accounts payable, CPAs, bookkeepers, and businesses that pay vendors, contractors, or other payees reportable on 1099. Ensure you request W-9 before or at payment, obtain correct TIN and certification, apply backup withholding when required, and keep records for 1099 filing and IRS compliance. Avoid penalties and last-minute 1099 prep.

Form W-9 Checklist: Vendor Tax Information Request form template preview

Key Benefits

Collect W-9 before or at first payment to avoid backup withholding
Ensure correct TIN (SSN or EIN) and name/tax classification
Support accurate 1099-NEC and 1099-MISC filing
Document certification and reduce IRS exposure
Track which vendors need 1099s and when
Professional AP and compliance workflow

Common Use Cases

Accounts payable teams onboarding new vendorsCPAs and bookkeepers managing client 1099 vendor listsBusiness owners paying contractors and freelancersFinance teams ensuring W-9 is on file before year-endAccounting firms supporting 1099 preparation and compliance

Frequently Asked Questions

When should I request a Form W-9 from a vendor?
Request a completed W-9 before or at the time of the first payment. If you pay $600 or more to a U.S. person for reportable income (e.g. services, rent, royalties), you need the payee's TIN and certification on file to issue 1099 and avoid backup withholding. Getting it early prevents delays and backup withholding later.
What information does Form W-9 collect?
Form W-9 collects the payee's name (or business name), tax classification (individual, LLC, corporation, etc.), address, and Taxpayer Identification Number (TIN)—either Social Security Number (SSN) or Employer Identification Number (EIN). The payee certifies under penalty of perjury that the TIN is correct and other certifications (e.g. backup withholding, FATCA) apply.
What is backup withholding and when does it apply?
Backup withholding (currently 24%) applies when you make reportable payments and the payee has not provided a valid TIN, has been notified by the IRS of TIN issues, or has not certified as required. You must withhold and remit to the IRS. A valid, certified W-9 helps you avoid backup withholding.
How long should I keep W-9 forms?
Keep W-9s at least four years after the year the information was used for reporting (e.g. for 1099 filing). The IRS can ask for them to verify 1099 amounts and TINs. Our checklist helps you track receipt and retention.

Checklist

Process

Request Form W-9 before or at time of first payment to vendor
Required

Do not wait until year-end. Getting W-9 early avoids backup withholding and supports accurate 1099 filing.

Track which vendors meet 1099 reporting threshold ($600+ reportable payments)
Required

Use W-9 and payment records to determine who gets 1099-NEC, 1099-MISC, etc. Update before year-end.

Re-request W-9 if IRS notifies you of missing or incorrect TIN
Required

Follow IRS notice (e.g. B Notice). Apply backup withholding if payee does not provide valid TIN after notice.

IRS Forms

Obtain completed Form W-9 (Request for Taxpayer ID and Certification)
Required

Use current revision. Payee must complete all applicable lines and sign. Provide your business name and address if requested.

Verification

Verify TIN (SSN or EIN) is legible and matches payee name
Required

Name on W-9 should match how you pay (check payee, 1099 recipient). Use IRS TIN matching if available to reduce errors.

Confirm tax classification (individual, LLC, C-corp, S-corp, etc.) is correct
Required

Affects whether you report on 1099 and which form (e.g. 1099-NEC for nonemployee compensation). Corporations generally exempt from 1099-NEC for services; LLCs depend on classification.

Note any backup withholding or FATCA exemption claims on W-9

Payee may certify exempt from backup withholding or FATCA. Keep W-9 on file to support not withholding when applicable.

Record Retention

Store W-9 securely with vendor/payee record (at least 4 years after use)
Required

Retain for 1099 reporting and IRS examination. Limit access to authorized staff; protect SSNs and EINs.