What Is the International Equivalent of a W-9?

The international equivalent of a W-9 is the W-8. Where a U.S. person hands a payer a W-9 to confirm taxpayer status, a foreign person provides one of five W-8 forms to certify foreign status and set how much U.S. tax the payer should withhold. Federal law requires payers to withhold 30 percent of most U.S.-source income paid to foreign recipients unless the recipient supplies valid documentation supporting a lower rate.¹

Who Files a W-8 Instead of a W-9

The dividing line is whether the recipient is a “U.S. person” for tax purposes. U.S. citizens, green card holders, resident aliens who meet the substantial presence test, and domestic entities like U.S. corporations and partnerships all file a W-9. Everyone else — nonresident alien individuals, foreign corporations, foreign partnerships, foreign trusts, and foreign estates — files a W-8.²

Two situations trip people up. A U.S. citizen working overseas is still a U.S. person and files a W-9, not a W-8. And a foreign national working temporarily in the United States who has not yet met the substantial presence test is a foreign person who needs a W-8.³

Getting the classification wrong is not harmless. The wrong form leads to too much or too little withholding, and the withholding agent is personally on the hook for any tax that should have been withheld but wasn’t.⁴

The Five W-8 Forms

There is no single W-8. The IRS publishes five versions, and the right one depends on who you are and what type of income you’re receiving.

W-8BEN is the most common. Foreign individuals who are the beneficial owner of income such as interest, dividends, royalties, or compensation for services use it. A nonresident alien freelancer invoicing a U.S. company files this form.⁵
W-8BEN-E is the entity version. Foreign corporations, partnerships, trusts, and other non-individual entities use it. The form runs much longer than the individual version because entities must identify their status under both Chapter 3 (entity type) and Chapter 4 (FATCA classification).⁶
W-8ECI covers foreign persons earning income effectively connected with a U.S. trade or business. Effectively connected income is taxed at graduated rates rather than the flat 30 percent, which is why it needs its own form.⁷
W-8EXP is for foreign governments, foreign central banks, international organizations, and foreign tax-exempt organizations. A tax-exempt entity generally needs an IRS determination letter or an opinion from U.S. counsel confirming its exempt status.⁸
W-8IMY is used by foreign intermediaries, foreign flow-through entities such as foreign partnerships, and certain U.S. branches that receive payments on behalf of others. A qualified intermediary uses this form to accept withholding responsibility on payments it passes to its own clients.⁹

If you receive both effectively connected income and other types of U.S. income from the same payer, provide two forms: a W-8ECI for the effectively connected portion and the appropriate W-8BEN or W-8BEN-E for the rest.⁷

The 30 Percent Default and How Treaty Benefits Reduce It

The starting point is IRC Section 1441, which requires payers to withhold 30 percent of most U.S.-source income paid to foreign persons. That rate applies to a broad set of payments: interest, dividends, rents, royalties, annuities, wages, and other compensation.¹

The United States has income tax treaties with dozens of countries, and many of them reduce or eliminate that 30 percent for specific types of income. To claim a reduced rate, complete Part II of the W-8BEN. Line 9 identifies the treaty country where you are a tax resident. When additional conditions apply, common with royalties, business profits, or scholarship income, Line 10 asks for the relevant treaty article, the type of income, and the rate you’re claiming.¹⁰

Treaty claims are where most errors happen. The withholding agent will not research treaty provisions for you. You have to identify the correct article and rate yourself. A freelance developer in Germany receiving royalties from a U.S. company needs to locate the royalties article in the U.S.-Germany treaty and state the specific reduced rate. Wrong article number, or a rate the treaty doesn’t contain, and the form gets rejected and the payer defaults to withholding the full 30 percent.

What You Need Before You Fill Out the Form

Missing any of the following items will delay processing or result in the full 30 percent withholding.

Your legal name must match your government-issued identification or, for entities, your registered legal name. Not a trade name, not an abbreviation. Your permanent residence address confirms where you are subject to tax; the IRS does not accept post office boxes or care-of addresses in this field.¹⁰

You’ll also need a taxpayer identification number. Foreign individuals can provide a Foreign Tax Identification Number (FTIN) from their home country, or a U.S. identifier such as a Social Security Number or Individual Taxpayer Identification Number. Entities provide an Employer Identification Number if they have one. A U.S. TIN is generally required if you’re claiming treaty benefits.

Entity-Specific Requirements

The W-8BEN-E asks entities to select both a Chapter 3 status (the entity type, such as corporation, partnership, simple trust, or disregarded entity) and a Chapter 4 status (FATCA classification). The Chapter 4 categories are extensive, ranging from participating foreign financial institution to active or passive non-financial foreign entity, and selecting the wrong one can trigger withholding that wouldn’t otherwise apply.¹¹ The FATCA classification exists so the withholding agent knows whether a foreign financial institution is meeting its U.S. account reporting obligations.¹²

Disregarded Entities

If your business is a disregarded entity for U.S. tax purposes, such as a single-member LLC, you generally do not file a W-8BEN-E yourself. Your owner provides the appropriate W-8 form. When a disregarded entity’s owner does file a W-8BEN-E, Line 1 shows the owner’s legal name, not the disregarded entity’s business name. The one exception: a disregarded entity that is a hybrid entity claiming treaty benefits in its own right enters its own legal name on Line 1.¹³

Signing and Submitting the Form

Download the current version of your form from IRS.gov. Part I handles identification: name, country of citizenship, address, and TIN, plus Chapter 3 and Chapter 4 selections for entities. Part II handles treaty claims. The remaining parts vary by form.

Every W-8 is signed under penalties of perjury. You are legally certifying the information is true and complete. Someone signing on behalf of a company must indicate their authority as director, officer, or other authorized role. False information can result in penalties and criminal investigation.²

Many withholding agents accept electronic submissions, but a valid electronic signature requires more than typing your name into a signature field. The IRS requires a time and date stamp along with a statement confirming the form was electronically signed. The payer may also ask for documentation showing the signer was authorized.¹⁰

One point that trips people up: you do not send W-8 forms to the IRS. Deliver the completed form directly to the withholding agent, meaning the business or person making the payment. They keep it on file and use it to set the withholding rate. Many payers have secure digital portals, though mail is still accepted.¹⁴

How Long a W-8 Stays Valid

A W-8BEN generally remains valid from the date you sign it through the last day of the third calendar year that follows. A form signed anytime in 2026 stays valid through December 31, 2029. After that, the withholding agent needs a new one.¹⁵

If something changes before the form expires, such as a move to a different country, a legal name change, or an entity restructuring, you must notify the withholding agent within 30 days and submit a new form. Miss that window and the withholding agent is required to apply the full 30 percent rate until a valid replacement is on file.¹⁶

Set a reminder before your form expires, and treat any change of address or entity status as urgent paperwork. Claim a treaty rate, move countries mid-year, forget to update the form, and your withholding can suddenly double.

Getting a U.S. Tax ID If You Need One

Many W-8 filers, especially those claiming treaty benefits, need a U.S. tax identification number. The path depends on whether you’re an individual or an entity.

Individuals: ITIN via Form W-7

Foreign individuals who don’t qualify for a Social Security Number apply for an Individual Taxpayer Identification Number by filing Form W-7. You generally need to attach the U.S. federal tax return that requires the ITIN, along with documentation proving your identity and foreign status. A valid passport is the simplest option and the only document that works on its own. Without a passport, you need at least two other acceptable documents, and at least one must include a photograph.¹⁷

All documents must be originals or certified copies from the issuing agency, and they cannot be expired at the time of submission. Photocopies and notarized copies don’t count.

Entities: EIN via Form SS-4

Foreign entities that need an Employer Identification Number file Form SS-4. They cannot use the IRS online application. Instead, they apply by phone at 267-941-1099 (not toll-free, 6 a.m. to 11 p.m. Eastern, Monday through Friday), by fax to 304-707-9471 with about a four-business-day turnaround, or by mail to IRS EIN International Operation in Cincinnati, OH 45999, which takes four to five weeks.¹⁸ Phone is fastest, but the caller has to be authorized to receive the EIN and answer questions about the application.

What Happens If You Skip the Form

Without any W-8, the withholding agent withholds 30 percent under Chapter 3. Consequences can stack. On reportable payments where the payee also fails to provide a TIN, backup withholding under IRC Section 3406 can apply. That rate is tied to the fourth-lowest income tax bracket and currently works out to 24 percent.¹⁹

The IRS can also impose a $1,000 penalty on a payee who is required to file a form but doesn’t, or who files one with incorrect information.² For the payer, the risk is larger: if they pay a foreign person without collecting a valid W-8 and without withholding, the IRS can pursue them for the full amount of tax that should have been withheld, plus penalties and interest.⁴

The simplest defense is to treat the W-8 the way you’d treat any other payment prerequisite. No valid form, no payment.

1
Office of the Law Revision Counsel. 26 USC 1441 – Withholding of Tax on Nonresident Aliens
2
Internal Revenue Service. Foreign Persons
3
Internal Revenue Service. Publication 519 (2025), U.S. Tax Guide for Aliens
4
Office of the Law Revision Counsel. 26 USC 1461 – Liability for Withheld Tax
5
Internal Revenue Service. About Form W-8 BEN, Certificate of Foreign Status of Beneficial Owner for United States Tax Withholding and Reporting (Individuals)
6
Internal Revenue Service. About Form W-8 BEN-E, Certificate of Status of Beneficial Owner for United States Tax Withholding and Reporting (Entities)
7
Internal Revenue Service. Instructions for Form W-8ECI
8
Internal Revenue Service. Form W-8EXP, Certificate of Foreign Government or Other Foreign Organization for United States Tax Withholding and Reporting
9
Internal Revenue Service. Instructions for Form W-8IMY
10
Internal Revenue Service. Instructions for Form W-8BEN
11
Internal Revenue Service. Form W-8BEN-E, Certificate of Status of Beneficial Owner for United States Tax Withholding and Reporting (Entities)
12
Internal Revenue Service. Summary of FATCA Reporting for U.S. Taxpayers
13
Internal Revenue Service. Instructions for Form W-8BEN-E
14
Internal Revenue Service. Instructions for Form W-8BEN (10/2021)
15
Internal Revenue Service. Instructions for Form W-8BEN (10/2021) – Section: Expiration of Form W-8BEN
16
Internal Revenue Service. Instructions for Form W-8BEN (10/2021) – Section: Change in Circumstances
17
Internal Revenue Service. Instructions for Form W-7
18
Internal Revenue Service. Instructions for Form SS-4
19
Office of the Law Revision Counsel. 26 U.S. Code 3406 – Backup Withholding