Guide
How to Collect W-9 from Contractors
By Keelstar Team · Updated July 11, 2026
The short answer
Collect Form W-9 from every U.S. independent contractor before their first payment — not after project completion. Contractors are almost always reportable on Form 1099-NEC when payments reach $600 in a calendar year, and most operate as sole proprietors or single-member LLCs. Send a secure W-9 request at contract signing or vendor setup, validate the TIN and classification on receipt, and track cumulative payments against the reporting threshold. Treat contractor W-9 collection as non-negotiable — the IRS expects payers to have TIN certification before making reportable payments.
Why contractors are high-priority W-9 payees
Independent contractors, freelancers, and consultants typically receive service payments reportable on Form 1099-NEC. Unlike large corporations, they rarely qualify for 1099 exemptions. Most are sole proprietors or disregarded LLCs providing SSNs. Missing contractor W-9s are the single largest source of year-end filing gaps in many AP departments.
When to request the W-9
Request at the earliest relationship touchpoint: contract execution, vendor setup in your ERP, or before the first purchase order — whichever comes first. Do not wait until the contractor submits their final invoice. By then, you may already owe reportable payments with no TIN on file.
Contractor-specific validation
Verify the name matches the contract signatory and the TIN type matches classification. Contractors often invoice under a DBA — the W-9 line 1 legal name must still match IRS records for the TIN provided. Check for signature and date; unsigned contractor W-9s are incomplete.
- Legal name on W-9 matches contract or engagement letter
- Classification is individual, LLC, or partnership — not corporation unless verified
- TIN format validated at intake
- Secure storage with SSN access controls
Track payments against the $600 threshold
Monitor cumulative contractor payments throughout the year. When a contractor approaches $600, confirm a validated W-9 is on file. If payments already exceeded $600 without a W-9, escalate immediately — retroactive collection is harder and may require B-notice procedures.
1099-NEC filing for contractors
File Form 1099-NEC by the IRS deadline (typically January 31) for each contractor paid $600 or more for services. Use the name and TIN from the validated W-9. Send Copy B to the contractor. If the W-9 was collected late or corrected, run TIN matching before filing.
Integrate with contractor onboarding systems
If HR or procurement manages contractor onboarding, embed W-9 collection in the same workflow as background checks and contract signatures. Block system access or payment until W-9 status shows validated. Centralize storage so AP does not chase individual hiring managers in December.
Frequently asked questions
- Do we need a W-9 from every contractor?
- Collect from every U.S. contractor you may pay — even if individual payments are small. Cumulative payments can exceed $600 quickly. Without a W-9 on file, you lack the TIN needed for 1099-NEC filing.
- What about contractors paid through a platform like Upwork?
- If the platform is the payer of record and issues the 1099, you may not need a separate W-9. If you pay the contractor directly, you are the payer and must collect the W-9. Clarify the payment flow before onboarding.
- Can a contractor refuse to provide an SSN?
- Some hesitate, but without a certified TIN you cannot file correctly and may face backup withholding obligations. Offer secure submission and explain the legal requirement. Escalate refusals before payments accumulate.
- Should HR or AP collect contractor W-9s?
- Whoever owns the contractor relationship can send the request, but AP or a centralized compliance function should validate and store the form. Avoid scattered collection in individual managers' email folders.
Related guides
Put this into a monitored workflow
W-9 Collector handles this continuously — with reminders and an audit trail.