W-9 collection
When Does a Contractor Need a W-9?
For firm workflows, request Form W-9 from a U.S. contractor during onboarding and before the first payment. The IRS uses Form W-9, or an acceptable substitute, to obtain the payee's correct name, TIN, and certifications for information-return reporting (https://www.irs.gov/instructions/iw9). The IRS does not state one universal before-payment deadline; onboarding is the operational standard. If a payee fails to furnish a TIN and a payment is reportable, backup withholding can apply at 24 percent until the cause is remedied, and the payer may be liable for uncollected amounts (https://www.irs.gov/instructions/iw9).
This page explains the rules for firm review workflows. It is not tax or legal advice.
Who this page is for
This page is for accounting and bookkeeping firms setting a consistent W-9 collection point across client vendor workflows. It covers timing and the operational reasons for collecting before payment.
The request mechanics belong in how to request a W-9 from a vendor. Refusal handling belongs in contractor will not provide a W-9. Vendor-file auditing belongs in the W-9 vendor readiness checklist, and the reporting decision belongs in who gets a 1099.
This page defines the W-9 timing workflow and does not resolve worker classification. Route unresolved worker status to the worker-classification workflow.
What Form W-9 supplies
Form W-9 is used to provide the correct TIN to a person required to file an information return. The requester instructions state that Form W-9, or an acceptable substitute, is used to obtain the payee's correct name and TIN (https://www.irs.gov/forms-pubs/about-form-w-9, https://www.irs.gov/instructions/iw9).
The form also records federal tax classification and required certifications. A valid Form W-9 or acceptable substitute contains the payee's name and TIN and, when certification is required, is signed and dated under penalties of perjury (https://www.irs.gov/instructions/iw9).
These records support the later reporting review. Collecting a W-9 does not itself determine whether a Form 1099 must be filed (https://www.irs.gov/instructions/i1099mec).
Before the first payment is the workflow standard
The IRS requester instructions describe when Form W-9 is used and the consequences of missing documentation, but they do not set one universal deadline requiring every contractor to return the form before the first payment (https://www.irs.gov/instructions/iw9).
For accounting and bookkeeping firms, onboarding before payment is the clean operating standard because the annual payment total, final payment method, and reporting category are often unknown when the engagement begins. Collecting once at setup lets the firm track payments and make the payment-year reporting decision later.
If payment begins before the W-9 arrives
Request the form promptly, preserve the request history, and continue tracking payments by payee and payment year. The refusal playbook covers follow-up and escalation.
For reportable payments, a failure to furnish a TIN is one backup-withholding trigger. The requester instructions state that the payer must deduct, deposit, and withhold 24 percent of reportable payments until the cause is remedied, and may become liable for an amount it failed to withhold (https://www.irs.gov/instructions/iw9).
The requester instructions also state that the 60-day awaiting-TIN exception applies only to interest, dividends, and certain readily tradable instruments. Nonemployee compensation is subject to backup withholding immediately when the rule applies, even when the payee has applied for and is awaiting a TIN (https://www.irs.gov/instructions/iw9).
When to refresh an existing W-9
Request updated documentation when the firm learns that the vendor's name, TIN, federal tax classification, or other relied-on information may no longer be current. Record the reason and date for the refresh so the filing-season reviewer can identify which version supports the current vendor record.
A refresh trigger is a record-control practice. It does not replace the separate reporting or worker-classification review.
Corporations and LLCs still need a documented classification
A business should not infer federal tax classification from a vendor's name or entity suffix. The current 1099-MISC and 1099-NEC instructions generally exempt payments to corporations while retaining specified exceptions, and the W-9 records the payee's certified classification (https://www.irs.gov/instructions/i1099mec, https://www.irs.gov/forms-pubs/about-form-w-9).
For LLCs, the form distinguishes disregarded entities from LLCs classified as corporations or partnerships (https://www.irs.gov/instructions/iw9). The entity-specific reporting analysis belongs in does an LLC get a 1099.
Form W-9 is for U.S. persons
The requester instructions use Form W-9 to request the TIN and certifications of a U.S. person, including a resident alien. They direct foreign persons to the appropriate Form W-8 or Form 8233, depending on the circumstances (https://www.irs.gov/instructions/iw9).
Route foreign-payee questions to the paying foreign contractors guide and a qualified professional. This page does not cover the foreign-person documentation or withholding analysis.
Collection timing checklist
| Situation | Timing action |
|---|---|
| New U.S. contractor onboarding | Request the W-9 with the engagement paperwork before the first payment |
| Annual total or payment method is uncertain | Collect during onboarding and apply the payment-year reporting rules later |
| Payment started before collection | Request the form promptly, preserve the request history, and review backup-withholding requirements |
| Name, TIN, or classification may have changed | Request updated documentation and record the refresh date |
| Worker status is unresolved | Complete classification review before routing the record to contractor or payroll workflows |
| Payee may be foreign | Route to the foreign-person documentation review |
| Request is ignored or refused | Follow the documented refusal and escalation process |
Make W-9 collection part of contractor onboarding
W9Finder helps accounting and bookkeeping firms import vendor CSVs, identify missing W-9s and incomplete records, send secure request links, track reminders, manage review handoffs, and export reviewed CSV files for the firm's filing process. Classification and reporting decisions remain with the firm and its qualified advisers. Explore W9Finder
Free QA tool
Scan your vendor list for W-9 gaps
Upload a vendor CSV to identify missing W-9s, incomplete records, and likely duplicates before collection begins.
Scanner output
FAQ
Is a W-9 legally required before the first payment?
The IRS does not state one universal before-payment deadline for every contractor relationship. For a firm workflow, collect the form during onboarding because it supplies the payee information needed for the later reporting review (https://www.irs.gov/forms-pubs/about-form-w-9, https://www.irs.gov/instructions/iw9). If a reportable payment is made without a furnished TIN and backup withholding applies, nonemployee compensation does not receive the 60-day awaiting-TIN exception (https://www.irs.gov/instructions/iw9).
Do I need a W-9 if the contractor will receive only a small amount?
Collect during onboarding because annual totals can change and reporting categories have different rules. For nonemployee compensation paid in 2025, the reporting threshold is $600 and the amount is reported in Form 1099-NEC box 1 (https://www.irs.gov/pub/irs-prior/i1099mec--2025.pdf). For nonemployee compensation paid in 2026, the threshold is $2,000 and the amount is reported in box 1a of the revised form (https://www.irs.gov/instructions/i1099mec). The full eligibility analysis belongs in who gets a 1099.
Do contractors paid by credit card or payment apps need a W-9?
Payment card and qualifying third-party network transactions are reported by the payment settlement entity under Form 1099-K rules and are not reported by the payer on Form 1099-NEC or Form 1099-MISC (https://www.irs.gov/instructions/i1099mec, https://www.irs.gov/forms-pubs/about-form-1099-k). A firm may still collect a W-9 during onboarding because payment methods and payment categories can change. Collection is a vendor-record practice, while the eventual form assignment follows the actual payment method and payment-year rules.
Does every contractor use Form W-9?
Form W-9 is for U.S. persons, including resident aliens. The requester instructions direct foreign persons to the appropriate Form W-8 or Form 8233, depending on the circumstances (https://www.irs.gov/instructions/iw9). Foreign-payee documentation and withholding require a separate review.