W-9 vs W-8BEN: Which Tax Form Each Vendor Needs

The difference comes down to one question: is the vendor a US person or not? You collect a Form W-9 from a US person, an individual, business, or entity, to get their taxpayer identification number for 1099 reporting. You collect a Form W-8, usually W-8BEN or W-8BEN-E, from a foreign person to establish they are not a US taxpayer and to set the correct withholding on any US-source income. A vendor gives you one or the other, never both, and picking the wrong one creates a filing problem that surfaces the following January.

That is the whole distinction in a sentence, but the details decide whether your accounts payable file holds up when it matters. Here is what each form is for, which vendor gives you which, when they expire, and how to collect them without it turning into a year-end scramble.

What Form W-9 is for

Form W-9 is how a US vendor gives you the information you need to report what you paid them. The IRS states its purpose plainly: use it "to provide your correct Taxpayer Identification Number (TIN) to the person who is required to file an information return with the IRS." When you pay a US contractor or business, you are the person required to file, which is why collecting the W-9 is your responsibility and not a favor the vendor does you.

The form captures the vendor's legal name, business structure, and taxpayer identification number, either a Social Security number or an Employer Identification Number. You keep it on file. You do not send it to the IRS. Its job is to feed the Form 1099-NEC you issue after year end, and to prove you collected the right details if a payment is ever questioned.

Two numbers make the W-9 worth collecting before the first payment rather than after. If a vendor has not given you a correct TIN, the IRS requires backup withholding at 24 percent, meaning you are obliged to hold back a quarter of the payment and remit it. And the reporting threshold moved for 2026: for payments made in calendar year 2026, the Form 1099-NEC threshold is now $2,000 or more in nonemployee compensation, raised by the One Big Beautiful Bill Act from the $600 level the IRS notes had been in place since 1954 without inflation indexing. It is adjusted for inflation in years after 2026. Most templates still print $600, which is now out of date. Collect the W-9 from every US vendor anyway, because you cannot predict at setup which ones will cross $2,000 by December.

What Form W-8 is for

Form W-8 is the foreign counterpart. A vendor that is not a US person does not give you a W-9; they give you the appropriate W-8 to establish their foreign status and claim any treaty benefit that reduces US withholding. There are several versions, but two cover almost every vendor scenario:

• Form W-8BEN is for a foreign individual, a sole proprietor or freelancer who is not a US person.
• Form W-8BEN-E is for a foreign entity, a company, partnership, or other organization based outside the US.

The "E" is the only thing separating the two names, and it stands for entity. If your foreign vendor is a person, it is W-8BEN. If it is a business, it is W-8BEN-E, which is a longer form because it also asks the entity to classify itself under the rules that determine its withholding treatment.

The reason the foreign form matters is withholding. US-source income paid to a foreign person can be subject to withholding of up to 30 percent unless an income tax treaty between the US and the vendor's country reduces the rate, and the W-8 is where the vendor claims that treaty benefit. The rules here are genuinely more complex than the domestic side, they turn on where the work is performed and what kind of income it is, so a first foreign vendor is a conversation with your accountant rather than a box you guess at. What belongs in your process is simpler: a foreign vendor gives you a W-8, not a W-9, and you file it.

The core difference, side by side

If you remember nothing else, remember this table.

When each form expires

This is the part most AP teams get wrong, because the two forms behave differently. A Form W-9 does not expire on a schedule. It stays valid until something on it changes, a new business name, a new entity structure, a new TIN, at which point you collect a fresh one. In practice you re-request a W-9 when you have a reason to think the details moved, not on a timer.

A Form W-8 does expire. It generally remains valid from the date it is signed through the last day of the third succeeding calendar year, unless a change in circumstances makes the information wrong sooner. So a W-8BEN-E signed in August 2026 is good through December 31, 2029, and then you have to collect a new one. Certain W-8s can remain valid indefinitely under specific conditions, but the safe default is the three-year rule. The practical consequence: diary every W-8 for re-collection before it lapses, because paying a foreign vendor on an expired W-8 puts you back to the default withholding position as if you never had the form.

Which form for the vendors you actually pay

A few common cases resolve the "which form" question quickly:

• A US freelance designer or a US LLC you contract with: W-9.
• A software company incorporated in the US: W-9, even if their engineers work abroad. Entity location is what counts, not where staff sit.
• A freelance developer who lives in and is a tax resident of another country: W-8BEN.
• A design agency incorporated in the UK, Canada, or India: W-8BEN-E.
• A US citizen living abroad: W-9. US citizens are US persons wherever they live.

When you are unsure whether a vendor is a US person, ask before the first payment rather than assuming. The classification drives which form you request, which year-end return you file, and how much you may be required to withhold, and it is far cheaper to settle at onboarding than to unwind after a payment has gone out.

How to collect these without a January scramble

The forms themselves are not the hard part. The hard part is that they arrive late, get filed in someone's inbox, and go missing exactly when you need them to file 1099s. Three habits fix most of it.

First, collect the form before the first payment, not after. A vendor who has been paid has no reason to send you anything. Requesting the W-9 or W-8 as part of vendor onboarding, alongside the contract and bank details, is the only reliable way to have it when January comes; the full onboarding sequence shows where the tax form sits relative to the contract and the first purchase order. Second, file it against the vendor record in your accounting system, not in an email thread, so the next person can find it without calling you. When a form comes back as a scanned PDF, it is worth being able to pull the details off the document into structured data rather than retyping them, because a mistyped TIN is a backup-withholding problem waiting to happen. Third, put the expiry on the calendar for every W-8, so a foreign vendor's form gets refreshed on the three-year clock instead of lapsing unnoticed. Expiry dates on tax forms, insurance certificates, and contracts all belong on the same review cadence, which is what the vendor management process exists to keep from slipping.

All three of those are coordination, not judgment, which is why they are the first thing to hand off. Requesting the form, chasing the vendor who has not returned it, filing it where it belongs, and diarizing the W-8 expiry is exactly the kind of follow-through that belongs in a written accounts payable process rather than in one person's memory. Get the tax form right at onboarding and the whole 1099 season stops being a scramble and becomes a report you run.

The short version

US vendor, you collect a W-9 for 1099 reporting; it does not expire until the details change, and missing a correct TIN triggers 24 percent backup withholding. Foreign vendor, you collect a W-8BEN if they are an individual or a W-8BEN-E if they are an entity, to establish foreign status and any treaty rate; it generally expires at the end of the third calendar year after signing. Collect the right one before the first payment, file it against the vendor record, and diary the W-8 for renewal. The 2026 1099-NEC threshold is $2,000, not the $600 most checklists still show.