W-8BEN and W-8BEN-E: FATCA, banks and withholding

The W-8BEN-E is not paperwork for storage: it supports banks, brokers, platforms, beneficiary status, FATCA, treaty position and withholding for a non-resident LLC.

The W-8BEN-E is not just another form: it tells banks, brokers and platforms who is being paid, who is taxable and which treaty position may apply. For a non-resident LLC, getting it right keeps collections, investment accounts, compliance and the tax file aligned.

This is the complete English guide, no unnecessary jargon but rigorous. You'll understand what these forms are, how they differ, who must file each one, where, how to fill them step by step and which mistakes can hit your wallet.

What W-8 forms are and why they exist

The W-8 series are <a href="https://www.irs.gov" target="_blank" rel="noopener">IRS</a> documents through which a non-US person or entity declares to the payer that they are not a US tax resident and, when applicable, that they claim a tax-treaty benefit to reduce or eliminate the default withholding.

The general US rule is that any US-source payment to a foreign person or entity is subject to a 30% withholding unless the recipient proves otherwise. That proof is delivered, precisely, with a W-8.

The most used ones are two:

• W-8BEN: for non-US individuals (a Spanish, Argentine, German person… receiving US-source income).
• W-8BEN-E: for non-US entities (your LLC, your Spanish SL, your German GmbH…).

Other forms exist (W-8ECI, W-8IMY, W-8EXP) for more specific cases that we leave outside this guide.

Key difference between W-8BEN and W-8BEN-E

A non-resident-owned Single-Member LLC is not a template decision. If the LLC is disregarded and the beneficial owner is a foreign individual, many flows document the owner's tax status with W-8BEN. W-8BEN-E becomes relevant when the payer needs entity documentation, when the owner is an entity, or when the onboarding flow explicitly asks for it. Exentax reviews the payer, ownership, treaty position and FATCA status before anything is signed.

What they're for in practice

To avoid the 30% withholding on US-source payments. The treaty between the US and Spain (and equivalents with many other countries) reduces that withholding to:

• 0% on most business profits (services rendered from outside the US without a permanent establishment).
• 15% on dividends of US companies (10% in qualifying participations).
• 0% on interest in general.
• 0-10% on royalties depending on type.

Without a signed W-8 the payer withholds 30% on everything and sends it to the IRS. With a properly completed W-8 you can receive your payments in full (most common case for services) or with the reduced treaty rate.

Who must file them

The form is filed by the recipient of the money, not the payer. That means:

• You as an individual if you receive US-source income directly (e.g. you're an independent advisor and a US client pays you via Wise, or a broker credits dividends to your personal name): W-8BEN.
• Your LLC or company if the payer requires entity documentation: it may be W-8BEN-E, but a disregarded Single-Member LLC owned by an individual may require the beneficial owner's W-8BEN instead.

When to file them

• When opening any account at a US bank, fintech or broker.
• When registering your business on a payment processor (Stripe, PayPal Business, Square...).
• When a US client asks for it before paying you for the first time.
• At renewal every 3 years (or sooner if your data changes: address, country of residence, etc.).

Where they go

Unlike other IRS forms, W-8 is not sent to the IRS. It is given to the payer (bank, broker, platform, client) who keeps it on file. If the IRS audits the payer, they justify with your W-8 why they didn't apply the 30% withholding or why they applied the treaty rate.

The most common platforms have W-8 flows built into onboarding:

• Stripe (US and Stripe Atlas): embedded W-8BEN-E during account creation.
• PayPal Business: requested when verifying the business account.
• Mercury, Relay, Slash, Wise Business: by default they do not require a W-8 to operate. They only request it if a specific compliance check asks for it; if the platform does not request it, you don't need to sign one.
• Interactive Brokers, Tradovate, Charles Schwab: requested when opening as a non-resident client.
• AdSense, YouTube, Twitch, Amazon KDP, App Store Connect: each has its own W-8 wizard.

How to fill a W-8BEN step by step (individual)

Structure: a single page, three parts.

Part I, Identification of the beneficial owner:

1. Name of individual: your full name as it appears on your passport or national ID.
2. Country of citizenship: your nationality (Spain, Mexico, Argentina, Germany…).
3. Permanent residence address: the address of your real tax residence, not a PO Box and not a US address.
4. Mailing address: only if different from above.
5. US TIN (SSN/ITIN): only if you have one. Most non-residents leave it blank.
6. Foreign tax identifying number: your home country's tax ID (NIF/NIE/CURP/CUIT…).
7. Reference number: rarely used; leave blank unless the payer asks for it.
8. Date of birth: MM-DD-YYYY format.

Part II, Treaty:

1. State the country with which you have a treaty: "Spain" if you're a Spanish tax resident.
2. Special detail: only filled if claiming a specific reduced rate (royalties, scholarships, etc.). For professional services rendered from outside the US, normally not filled.

Part III, Certification:

Sign, date and print name. You're declaring under penalty of perjury that the data is true. Lying here gets you in serious trouble with two tax authorities at once. Exentax maps the weak point to a concrete next step inside the client file.

How to fill a W-8BEN-E step by step when the entity form applies

It is longer (8 pages) and should only be completed when the payer asks for entity documentation or a specific FATCA/treaty case. For a non-resident-owned LLC, first confirm whether the right form is the beneficial owner's W-8BEN or an entity W-8BEN-E.

Part I, Identification of the entity:

1. Name of organization: the exact legal name of your LLC.
2. Country of incorporation: "United States".
3. Disregarded entity name: only if the payer asks you to identify a separate disregarded entity; do not invent one.
4. Chapter 3 status: do not mark "Corporation" by default. It depends on the real tax classification, any election in place and what the payer is documenting.
5. Chapter 4 status (FATCA): mark "Active NFFE" (Active Non-Financial Foreign Entity) if your LLC bills services or sells products. If it's a passive investment vehicle, it would be "Passive NFFE".
6. Permanent residence address: the permanent tax address of the entity being documented; do not use a US registered-agent address as residence when it does not apply.
7. Mailing address: optional.
8. US TIN (EIN): your LLC's EIN.
9. GIIN: leave blank unless your LLC is a registered FATCA financial institution (not the typical case).
10. Foreign TIN: only if it belongs to the documented person or entity; do not invent a NIF, ITIN or FTIN to complete the form.

Part III, Treaty:

• Mark that the beneficial owner is a tax resident of Spain (or whichever country applies).
• Indicate that you meet the limitation on benefits (Art. 17 of the US-Spain treaty): for a small LLC with a single Spanish-resident member, this is normally satisfied under ownership and base-erosion tests, or as an individual if the member qualifies directly. When in real doubt, consult your advisor.
• In the income type and treaty article field, indicate the article that applies (Business Profits, Royalties, Dividends, etc.) and the reduced rate you're entitled to.

Part XXV, Active NFFE: a box certifying that more than 50% of your income is active (non-passive). Standard for an operating LLC.

Official W-8BEN-E Part XXX (Certification): sign, name, capacity and date.

Common mistakes that will cost you money

1. Putting a US address as permanent residence. The system reads it as you being a US person and applies different withholdings or asks for a W-9.
2. Using W-8BEN when you should use W-8BEN-E (or vice versa). Be careful with mixed accounts.
3. Not signing. Without a valid handwritten or digital signature, the payer treats the form as nonexistent.
4. Forgetting the Foreign TIN when the payer requires it (Stripe, IBKR and similar).
5. Not marking Chapter 4 status. Without it, banks must apply the 30% FATCA withholding.
6. Claiming a treaty rate you're not entitled to. Declaring 0% where your real case is 15% can backfire under audit. Exentax makes the weak point reviewable: decision, evidence and next task.
7. Not renewing after 3 years. After 3 years the form expires; the payer starts withholding 30% until you update it.

Validity and renewal

A signed W-8 is valid for 3 full calendar years from the date of signing. If during that period substantial data changes (change of country of tax residence, name change, change of entity type, end of treaty), you must file a new one as soon as the change occurs. And mark a calendar reminder to renew on time: most platforms warn you, but not all.

Connection with the US-Spain treaty

The Convention between the Kingdom of Spain and the United States of America to avoid double taxation and prevent fiscal evasion, signed in 1990 and modernized by the 2013 Protocol in force since 2019, is the legal basis for most reduced rates on the W-8 when you're a Spanish resident. In particular:

• Business profits (Art. 7): without a permanent establishment in the US, profits are taxed only in Spain. Result for services rendered from outside the US: 0% withholding.
• Dividends (Art. 10): reduced to 15% (10% in qualifying participations).
• Interest (Art. 11): generally 0%.
• Royalties (Art. 12): between 0% and 10% depending on type.

To see how this fits with your LLC, also read our <a href="/en/blog/us-spain-tax-treaty-for-llc-owners-and-irpf">US-Spain double-taxation treaty applied to LLC</a>.

Practical cases by platform

• Stripe (US or Atlas): may ask for an embedded W-8 flow when creating the account. Do not complete it from a template: confirm whether it documents the LLC, the beneficial owner or both, then validate EIN, tax address, FATCA and treaty before signing.
• PayPal Business: requested when verifying the business account. Upload the signed PDF via the resolution center.
• Mercury / Relay / Slash: they do not ask for it during standard LLC onboarding. They only request it if a one-off compliance review specifically requires it; if the platform does not ask, you don't need to sign one to operate.
• Wise Business: same criterion as Mercury / Relay: only if expressly requested. It is not a default step when registering your LLC.
• Interactive Brokers: requests tax certification at account opening. The form and box depend on the actual account holder; for US dividends, treaty relief can reduce withholding to 15% when the beneficial owner qualifies.
• AdSense / YouTube / Amazon KDP / App Store / Twitch: each has its own wizard that internally generates the correct W-8. Fill carefully: changing it later is cumbersome.

How Exentax helps

At Exentax we prepare the right W-8 for your case and help you submit it wherever it is actually required: Stripe, IBKR and other brokers, affiliate platforms, AdSense / YouTube / Amazon KDP and any US payer that requests one. For Mercury, Relay, Slash or Wise we only sign one if the platform explicitly asks. If you've already been hit with 30% withholdings due to a wrong W-8, we also assess whether it's viable to request a refund via 1042-S and associated forms, although it's always much cheaper to do it right from the start.

> Every case is individual and tax law can change; these forms and FATCA criteria are updated periodically. So review your paperwork with each major change in your business or whenever the IRS publishes a new version.

If you want us to review your situation, book your strategic review with Exentax and we'll get your LLC's W-8s and your international paperwork in order.

To go deeper, also read <a href="/en/blog/us-llc-bank-accounts-fatca-crs-and-privacy">Do US bank accounts report to your home tax authority?</a> and <a href="/en/blog/us-llc-vs-spanish-autonomo-structure-banking-tax">US LLC as an alternative to being self-employed in Spain</a>.

The right W-8 form depends on the beneficial owner, tax classification and requester context; a clean certificate should be backed by the same evidence as the LLC file.

> <a href="/en/book">Review my case</a>

For W-8BEN and W-8BEN-E, the form should reflect the actual beneficial owner and tax classification. A clean form is supported by identity, residence, entity documents, TINs and the reason the requester needs the certificate.

Choose the W-8 form by person, entity and requester

W-8 forms are small documents with a large compliance impact. Exentax checks the signer, entity classification, treaty position, requester context and supporting file before a form is treated as bank-ready.

W-8 in plain words: who certifies what

The W-8 family answers a single, repeated question from US payers: is

the person on the other side of this payment a US person for tax

purposes, and if not, what status do you certify so the right

withholding rule applies. There are several variants because the

answer depends on whether the payee is a person, an entity, an

intermediary or a foreign government. Most LLC owners only ever

interact with two of them.

For a single-member LLC owned by a non-US person and treated as

disregarded for US tax purposes, US payers typically request the

W-8BEN-E from the LLC and, in some platforms, also a W-8BEN from the

member as the beneficial owner. The names look similar but the

documents serve different roles in the same relationship.

Three real cases we see often

A SaaS LLC sells to US enterprise customers under a master services

agreement. The procurement team requests the W-8BEN-E with the LLC's

EIN, the country of organisation (Wyoming or New Mexico for instance)

and a treaty claim if the member is in a country with a US tax treaty.

A clean form on file means the customer pays without backup

withholding and the audit trail is complete on both sides. Exentax reviews the case before money, signatures or provider replies move forward.

A US-based marketplace pays an LLC owned by a Spanish tax resident.

The platform asks for a W-8BEN-E from the LLC and, inside the platform account,

records the beneficial owner. We populate the treaty claim where it

applies, attach the LLC's formation document and the EIN letter, and

the payouts proceed at the standard treaty rate.

A advisory LLC works for a US-listed corporate. Their AP system

runs annual W-8 refreshes; we update the form with the same data,

keep both the previous and the new copy in the LLC's compliance

folder, and flag the renewal date in our internal calendar so the

client never sees a missed cycle.

Mistakes that delay payments

• Mixing W-8BEN and W-8BEN-E. Individuals sign W-8BEN; entities

entity documentation may require W-8BEN-E. Do not cross the wires.

• Leaving the treaty box blank when a treaty applies. The treaty

claim is what brings the withholding from 30% to the treaty rate;

unclaimed, the payer withholds at the default.

• Using the foreign address from years ago. The form must reflect

the current residence; mismatches with the BOI submission or with

KYC files trigger requests for re-issue.

• Signing on behalf of the LLC without authority. Single-member

LLC are easy; multi-member LLC need the operating agreement to

show signing authority.

Renewal and storage checklist

• W-8 forms expire on the third complete year after signature.
• Keep both the signed PDF and the source data in the LLC's

compliance folder.

• Update before residence changes hit the bank or the payer.
• Confirm the EIN on the form matches the EIN on file with the IRS.
• Match the LLC name and DBA to formation documents exactly.

We treat the W-8 cycle as part of the LLC's annual hygiene, the same

way we treat BOI refreshes and bank profile updates: small recurring

work that prevents large recurring problems.