W-9 vs W-8 BEN: When to Use Which Form for Domestic and Foreign Persons

Almost every dispute about these forms is really a dispute about one word. The word is person, and in this context it means tax status rather than nationality, residence or where somebody happened to be sitting when they signed. Once the status is settled the form follows automatically, the withholding follows the form, and the reporting follows the withholding. Getting the status wrong at the start puts every later step wrong too, and the payer, not the payee, carries most of the cost.

The Fundamental Question: US or Foreign?

The choice between W-9 and W-8 BEN comes down to ONE question: is the recipient a US person or a foreign person?

"US person" includes: US citizens, US resident aliens, US-formed entities (LLCs, corporations, partnerships, trusts), and US estates. US persons complete W-9.

"Foreign person" includes: non-US-citizen individuals not residing in the US, foreign-formed entities, foreign partnerships, foreign trusts, foreign estates. Foreign persons complete W-8 BEN (individuals) or W-8 BEN-E (entities).

The distinction is not about WHERE the person is when they sign the form. It is about their tax-status classification. A US citizen living in Japan completes W-9, not W-8 BEN. A French citizen who happens to be in the US on a tourist visa completes W-8 BEN, not W-9.

What Form W-9 Does

At a Glance

Form W-9 is "Request for Taxpayer Identification Number and Certification." Completed by US persons to provide their TIN (SSN, EIN, or ITIN) to a payor.

Three certifications on the form: (1) the TIN provided is correct; (2) the person is NOT subject to backup withholding (typically true unless the IRS has notified them otherwise); (3) the person is a US person.

No tax withholding follows from a properly completed W-9. The payor reports payments to the IRS via 1099 forms (NEC, MISC, K, INT, DIV, etc.) and the recipient pays tax via their own return.

W-9 has no expiry. Once on file it stays valid until the payee's information changes: a name change, a TIN change, a change of federal tax classification, or a change to or from US person status. The payee is expected to send a fresh one when that happens, and payers who never ask end up reporting to a classification that stopped being true two years earlier.

Two lines carry more weight than the rest. Line 3a is the federal tax classification, and it is what decides whether the payee is exempt from 1099 reporting: most corporations are, disregarded single-member LLCs and partnership LLCs are not, and an LLC that elected corporate treatment is. Line 3b, added for flow-through entities, is where a partnership, trust or estate indicates that it has foreign partners, owners or beneficiaries when giving the form to another flow-through entity. Line 4 carries the exempt payee and FATCA codes. Everything downstream, whether you file a 1099 at all, is read off those lines rather than off the business name.

What Form W-8 BEN Does (Individuals)

Form W-8 BEN is "Certificate of Foreign Status of Beneficial Owner for United States Tax Withholding and Reporting (Individuals)." Completed by foreign INDIVIDUALS to:

(1) Certify they are NOT a US person.

(2) Claim any applicable tax treaty benefit (reduced withholding rate on US source income).

(3) Establish that they are the beneficial owner of the income (not an intermediary).

Without a valid W-8 BEN, the payor must withhold 30% on US source FDAP income (fixed, determinable, annual, periodic, interest, dividends, royalties, certain rents, certain services). With a valid W-8 BEN claiming treaty benefit, the rate may be reduced (e.g., 15% for UK, 10% for some other countries, 0% for certain treaty positions).

Validity: the form is generally effective from the date it is signed until the last day of the third succeeding calendar year. A W-8 BEN signed in March 2026 therefore runs to 31 December 2029, not to March 2029, which is the one part of the rule people get wrong in their own favour. It also stops being valid earlier if a change in circumstances makes any information on it incorrect, and the payee is required to notify the withholding agent within 30 days of that change.

What Form W-8 BEN-E Does (Entities)

Form W-8 BEN-E is the entity version of W-8 BEN, for foreign-formed entities (corporations, partnerships, trusts, etc.).

The form is significantly more complex than W-8 BEN. It captures: entity type classification, country of organization, GIIN (for FATCA purposes) if applicable, beneficial-owner certification, and any tax treaty claim.

FATCA implications: foreign financial entities receiving payments from US sources must comply with FATCA reporting. The W-8 BEN-E captures the entity's FATCA status. Non-compliant entities face 30% withholding regardless of treaty position.

Validity: 3 years from the year of signing (same as W-8 BEN).

Which Form to Request from Different Recipients

US individual (US citizen or US resident alien): W-9.

US-formed LLC, corporation, partnership or trust: W-9. The form captures the entity's federal tax classification, which decides whether 1099s are issued at all. A disregarded single-member LLC reports under its owner's name and TIN, not under the LLC's trading name, which is the single most common completion error on the form. How the classification is set in the first place is covered in Form 8832 and Form 2553, and what it means for the entity's own return in federal returns by entity type.

Foreign individual, meaning neither a US citizen nor a resident alien under the substantial presence or green card tests: W-8 BEN. For treaty benefits they need a US TIN and a completed Part II. A worker who becomes a resident alien mid-year changes status and owes the payer a W-9 from that point, which is exactly the change in circumstances the 30 day notification rule is about.

Foreign-formed entity: W-8 BEN-E. More complex form. May require professional preparation, especially for treaty claims and FATCA classification.

Foreign branch of US entity, or US branch of foreign entity: special W-8 forms apply (W-8 IMY for intermediaries, W-8 ECI for effectively connected income). Beyond the scope of this article, consult a tax advisor.

Treaty Benefits on W-8 BEN

The United States has income tax treaties with more than 60 countries, listed A to Z on the IRS treaty page. A treaty typically reduces the 30% default withholding rate on US source income flowing to a resident of the other country, and it does so by income type rather than across the board.

Common treaty rates on common income types: dividends (15% UK, 5% US-UK qualifying parent-subsidiary), interest (0% UK and many others), royalties (varies widely, 0% for many countries), pension income (0% generally).

To claim treaty benefits, the foreign person must be a resident of a treaty country, hold a US taxpayer identification number, usually an ITIN, and complete Part II. Line 9 names the treaty country. Line 10 is for claims that need conditions beyond the standard representations, including business profits and scholarship claims, and is where the specific article, the rate and the type of income go. Line 6a takes the foreign taxpayer identifying number issued by the country of residence, and line 6b is the box to tick where that jurisdiction does not issue one. A form missing line 6a and without the 6b box ticked is incomplete on its face.

Common error: claiming treaty benefits without providing an ITIN. The payor must still withhold 30% if the ITIN is missing. Get the ITIN before claiming treaty benefits.

What Happens Without a Valid Form

Without W-9 from a US person: the payor must apply BACKUP WITHHOLDING of 24% on all future payments. The withholding is remitted via Form 945 (Annual Return of Withheld Federal Income Tax). The recipient must wait for their tax return to recover the over-withholding.

Without W-8 BEN from a foreign person: the payor must withhold 30% on US source FDAP income. The recipient cannot recover the over-withholding unless they file a US tax return (Form 1040-NR for individuals, Form 1120-F for foreign corporations), which requires a TIN.

Treaty position claimed without supporting documentation: 30% withholding applies. The recipient must file a US return to claim the treaty refund.

There is a third cost that sits on the payer rather than the payee. An information return filed with a missing or incorrect TIN carries the same charge as one not filed at all: $60 per form if corrected within 30 days, $130 if corrected by August 1, $340 after that, and a minimum of $690 for intentional disregard, with a separate charge of the same size for the payee statement. A payer with forty undocumented contractors is looking at five figures on the paperwork alone, before any withholding question.

Best practice for payers: collect the form before the first payment. Once money has moved, the cost of recovering over-withholding shifts to the recipient and the payer has nothing left to withhold against. The threshold and deadline rules for the resulting forms are in 1099-NEC and 1099-MISC reporting, and the question of whether the payee should have been on payroll instead is in independent contractor versus employee.

Three Payer Files in Practice

The three below are composites of businesses collecting these forms. The withholding rates, validity periods and penalty figures are the real ones; the business facts are illustrative.

Example 1: Tallgrass Media and a mixed contractor bench

A Kansas City agency uses nineteen contractors, fourteen of them US persons and five abroad. It had been sending the same onboarding pack to all nineteen, which meant five foreign contractors signed a W-9 certifying US status that was not true. Nothing surfaced for two years, because the agency also issued them 1099-NECs and nobody withheld anything. The exposure sits with the agency: a payer with reason to know a payee is foreign cannot rely on a W-9, and the unwithheld 30% on US source payments is recoverable from the payer. The fix is a single question at onboarding, are you a US person for tax purposes, that routes the contractor to the right form before the first payment.

Example 2: Juno Levy, a US citizen in Lisbon

A US-citizen developer moved to Portugal and now bills a US client from a Portuguese address. The client's accounts team saw the foreign address and asked for a W-8 BEN. That is the wrong form and a false certification, because a US citizen remains a US person wherever they live. The correct document is a W-9 with the Portuguese address on it, the client issues a 1099-NEC if the payments reach the threshold, and the developer reports the income on a US return like any other citizen. Physical location has no bearing on the question. Where the developer's own entity sits is a separate matter, covered in what is an LLC.

Example 3: Praxis Werk GmbH and the entity form

A German software vendor licenses a product to a US customer for $150,000 a year. It sends a W-8 BEN, which is the individual form and cannot document an entity. The correct form is W-8 BEN-E, which captures the entity's chapter 4 status for FATCA purposes as well as its treaty claim. Until a valid form is on file the customer must withhold 30%, which is $45,000 a year held back, and a FATCA-noncompliant entity faces that rate regardless of any treaty position. The vendor also needs a US taxpayer identification number for the treaty claim, which puts an application on the critical path for a contract that has already started. Foreign-owned US structures run into the same documentation questions from the other side; see forming a US LLC without an SSN and Form 5472.

Common W-9 / W-8 BEN Mistakes

Six failures produce almost all of the withholding problems in this area, and five of the six are settled by asking one question at onboarding.

Mistake 1: Sending a W-8 BEN to a US person who lives abroad

What happens. The payer sees a foreign address and sends the foreign form. Why it fails. A US citizen or resident alien is a US person wherever they live. Status, not geography, decides. Consequence. A certification of foreign status that is untrue, and a payer file that will not survive review. Prevention. Ask the status question rather than reading the address.

Mistake 2: Accepting a W-9 from a foreign payee

What happens. A contractor abroad completes the form the payer sent, because that is the form they were sent. Why it fails. Only a US person can make the certification on a W-9, and it is signed under penalties of perjury. Consequence. Where the payer knows or has reason to know the payee is foreign, the payer takes on the unwithheld 30% itself. Prevention. Route foreign payees to W-8 BEN or W-8 BEN-E at onboarding, before any money moves.

Mistake 3: Letting a W-8 BEN run out

What happens. A form signed years ago stays on file and nobody tracks the date. Why it fails. Validity ends on the last day of the third calendar year after signing, and earlier if circumstances change. Consequence. 30% withholding applies from expiry until a new form arrives, and the payee has to file a US return to recover it. Prevention. Store the expiry date, not the signature date, and request a replacement in the November before it lapses.

Mistake 4: Claiming a treaty rate without a US TIN

What happens. Part II is completed with a treaty article and rate, and the TIN field is empty. Why it fails. A treaty claim on this form needs a US taxpayer identification number. Consequence. The claim is invalid, the payer withholds at 30%, and the money is recoverable only through a US return. Prevention. Start the ITIN application months before the contract, since it takes seven weeks at best and up to eleven in the January to April window.

Mistake 5: Using the individual form for an entity

What happens. A foreign company signs a W-8 BEN. Why it fails. W-8 BEN documents an individual. An entity uses W-8 BEN-E, which also captures its FATCA classification. Consequence. An invalid form, and 30% withholding while it is corrected. Prevention. Check whether the payee is a person or a company before choosing the form, and expect the entity version to need help.

Mistake 6: Paying first and documenting later

What happens. Work starts, invoices are paid, and the forms are chased at year end. Why it fails. By then the payee has no reason to respond, and the information return is due in January with whatever the payer has. Consequence. Information returns filed with a missing or wrong TIN cost $60 to $340 per form on a sliding scale, with a separate charge of the same size for the payee statement. Prevention. Make the form a condition of vendor setup, the same way bank details are. Bookkeeping systems that block payment without one solve this permanently.

How File.Business Handles Tax Forms

For US founders forming entities: we provide W-9 templates pre-populated with the entity's information (name, EIN, classification) ready to send to clients and payors.

For foreign founders forming US entities: we prepare W-8 BEN (for individual founders) or W-8 BEN-E (for foreign-formed entity owners). If treaty benefits are claimed, we coordinate the ITIN application first.

For US entities working with foreign contractors: we provide W-8 BEN / W-8 BEN-E collection process integrated with our contractor onboarding flow, ensuring forms are collected before first payment and refreshed before 3-year expiration.

Standalone services: W-9 template + entity info population: included in formation. W-8 BEN preparation for foreign individuals: $99 flat. W-8 BEN-E preparation for foreign entities: $249 flat.

Frequently Asked Questions

Disclosure. File.Business is a private filing service, not a government agency and not a law firm. We prepare and submit filings at your direction, and nothing on this page is legal or tax advice. Filing fees, deadlines, and statutory references are current as of the last-updated date shown above and can change. Confirm current requirements with the relevant state agency before you file.