Vendor Management | W-9
Ask while they still want paying.
A vendor who has not been paid yet returns a W-9 the same day. A vendor paid in full eleven months ago has no reason to answer at all. The form is collected through the vendor portal as part of onboarding, held against the vendor record, and can be made a condition of the first payment. Everything downstream depends on this one being done early.
What the system does
Capability, input, output.
| Capability | Input | Output |
|---|---|---|
| Collected in the portal | A vendor onboarding themselves | The form completed and submitted by the vendor, not emailed and retyped |
| Gate the first payment | A vendor with no form on file | Payment held at approval, which is the moment you have leverage |
| Classification captured | The entity type certified | Reportable status set on the vendor, driving 1099 treatment from day one |
| US or foreign fork | The vendor's certification of status | A W-8 requested instead where the vendor is not a US person |
| Change detection | A vendor changing name or entity type | A fresh form requested, since the one on file no longer describes them |
| Held with the vendor | The completed form | Stored against the vendor record with its date, not in a shared drive |
| Gap list | Vendors with spend and no form | Ranked by spend, so the chase starts with what is actually at risk |
-
Collected in the portal
- Input
- A vendor onboarding themselves
- Output
- The form completed and submitted by the vendor, not emailed and retyped
-
Gate the first payment
- Input
- A vendor with no form on file
- Output
- Payment held at approval, which is the moment you have leverage
-
Classification captured
- Input
- The entity type certified
- Output
- Reportable status set on the vendor, driving 1099 treatment from day one
-
US or foreign fork
- Input
- The vendor's certification of status
- Output
- A W-8 requested instead where the vendor is not a US person
-
Change detection
- Input
- A vendor changing name or entity type
- Output
- A fresh form requested, since the one on file no longer describes them
-
Held with the vendor
- Input
- The completed form
- Output
- Stored against the vendor record with its date, not in a shared drive
-
Gap list
- Input
- Vendors with spend and no form
- Output
- Ranked by spend, so the chase starts with what is actually at risk
W-9 FAQ
What buyers ask.
Why does the timing matter this much?
Because leverage disappears the moment you pay. Before the first payment, a request for a W-9 is a routine onboarding step and vendors complete it without friction. After final payment, you are asking a stranger to do you an administrative favour, and the response rate reflects that. The whole 1099 problem is downstream of this one step.
Can we block payment until the form is in?
Yes, and most teams turn it on once they have seen the alternative. The gate sits in the approval flow rather than at the payment run, so the requirement is visible to the person approving the bill and can be overridden deliberately by someone with the authority to accept the risk.
What about vendors we already pay and have no form for?
They come back as a list ranked by spend, which is the useful order because it puts the exposure first. The realistic outcome is that you close the top of that list and accept that some long-tail vendors will not respond, which is a known position rather than a discovery in January.
Do you verify the form is correct?
We check it is complete and internally consistent, and hold it against the vendor. Checking that the name and number actually match IRS records is a separate act with real value, and it has its own page. The two together are what makes a payee record trustworthy; either alone leaves a gap.
What if a vendor changes their business structure?
A fresh form is requested, because the one on file certifies something that is no longer true and the reportable status may have changed with it. Sole proprietors incorporating is the common case, and it is easy to miss because the vendor name in your system often does not change at all.
See which paid vendors have no W-9 on file.
Connect your books, free. Vendors are matched against the forms you hold, and the gaps come back ranked by what you have already paid them.