If you are a Mexican resident running a Wyoming LLC, the good news is simple: the United States and Mexico have a comprehensive income tax treaty that has been in force since January 1, 1994, and it is one of the more useful treaties for cross-border founders. But the bigger and more frequently missed point is that for most non-resident LLC owners, the treaty barely changes the outcome, because the income their LLC earns is not US-source FDAP income in the first place. This guide separates what the treaty actually does from what founders assume it does, gives you the verified per-income-type rates, and walks through the paperwork you genuinely owe Washington regardless of any treaty.
Treaty status and what it means for mexico founders
The treaty is in force. The IRS lists Mexico on its official "United States income tax treaties - A to Z" page, and the underlying convention (signed September 18, 1992) entered into force with effect from January 1, 1994. It has been modernized twice since, including a Protocol that the US Treasury announced entered into force on July 3, 2003. So when a payer or a tax adviser tells you "there is a treaty with Mexico," they are correct, and you can rely on it.
What the treaty does is allocate taxing rights between the two countries and cap the rate at which each country can tax certain payments flowing to residents of the other. The treaty covers US federal income tax and Mexico's Impuesto Sobre la Renta (ISR). Crucially, the treaty applies to residents of either country, not citizens, so a Mexican tax resident qualifies for benefits whether or not they hold Mexican nationality, provided they can satisfy the Limitation on Benefits article (Article 17).
For a Wyoming LLC owner, the treaty matters in three practical ways. First, it caps US withholding on genuinely US-source passive income (dividends, interest, royalties) at rates well below the 30% statutory default. Second, its Business Profits article (Article 7) confirms that your Mexican-resident business profits are taxable only in Mexico unless you have a US permanent establishment (PE). Third, it provides tie-breaker rules and a foreign tax credit mechanism so the same dollar is not taxed twice. The catch — and it is the central theme of this guide — is that a single-member Wyoming LLC is a disregarded entity by default, so the treaty looks through the LLC to you, the Mexican-resident member. The treaty does not give the LLC any special status; it gives you benefits. And those benefits only bite where US tax would otherwise apply, which for most operating businesses is nowhere. Source: IRS United States income tax treaties - A to Z and the IRS Mexico tax treaty documents page.
Withholding rates by income type
The table below shows the verified maximum US withholding rates under the Mexico-US treaty versus the 30% statutory default that applies to US-source FDAP income paid to a non-resident with no treaty claim on file. Rates come from Articles 10 (dividends), 11 (interest), and 12 (royalties) of the convention, as summarized in the Joint Committee on Taxation explanation and the IRS treaty text.
| US-source income type | Default US withholding | Mexico treaty rate | Treaty article |
|---|---|---|---|
| Dividends — beneficial owner is a company owning 80%+ of voting shares (12-month holding) | 30% | 0% | Art. 10 |
| Dividends — beneficial owner is a company owning at least 10% of capital | 30% | 5% | Art. 10 |
| Dividends — all other cases | 30% | 10% | Art. 10 |
| Interest — banks, insurers, publicly traded bonds, certain institutional lenders | 30% | 4.9% | Art. 11 |
| Interest — other bank-paid interest and seller financing | 30% | 10% | Art. 11 |
| Interest — all other cases | 30% | 15% | Art. 11 |
| Royalties | 30% | 10% | Art. 12 |
| Active business profits with no US permanent establishment | Not US-taxed | Not US-taxed | Art. 7 |
Two corrections worth flagging, because older summaries (including an earlier version of our own data) got these wrong. The dividend rate is not simply "5% or 10%" — there is a genuine 0% tier for an 80%-plus corporate owner that has held the voting shares for a 12-month period. And interest is not a flat "10-15%"; the treaty has a low 4.9% tier for bank and institutional-type interest, which is the rate most commonly available. Note also that much US-source interest paid to non-residents is already exempt under the domestic "portfolio interest" exemption, in which case you may not need the treaty for interest at all. Sources: IRS-US-Mexico Income Tax Convention (PDF) and PwC Mexico-Corporate withholding taxes.
A few words on how to read this table correctly. Every rate shown is a maximum — a ceiling on what the US is permitted to charge a Mexican resident, not a tax the US automatically imposes. If no US-source payment of that type ever lands in your LLC, none of these numbers touch you. The 0% and 5% dividend tiers also assume the beneficial owner is a company; an individual Mexican member holding US shares directly through a disregarded LLC will generally land in the 10% "all other cases" row, because the treaty's reduced corporate-shareholder tiers are written for company-to-company ownership chains. Finally, all of these reduced rates are conditioned on Article 17, the Limitation on Benefits (LOB) article. The Mexico treaty has a relatively demanding LOB clause designed to stop treaty-shopping; a genuine Mexican-resident individual running a real business will usually qualify under the individual or active-trade-or-business tests, but a thinly-capitalized holding entity inserted purely to capture the rate may not. When in doubt, the safest claim is the one you can defend: residence in Mexico, real economic activity, and beneficial ownership of the income.
Does the treaty even matter for your LLC?
Here is the part most founders get backwards. Before you can use a treaty rate, there has to be US tax to reduce. For the typical Mexican-owned Wyoming LLC, there usually is not.
A single-member LLC with a non-resident owner is a disregarded entity. The US tax question therefore collapses to: does the Mexican owner have income that the US is allowed to tax? US tax on a non-resident reaches only two buckets: (1) US-source FDAP income — passive items like dividends, interest, rents, and royalties from US payers — and (2) income that is effectively connected with a US trade or business (ECI). The treaty rates in the table above only apply to bucket (1).
Most operating LLCs earn neither. Consider the classic pattern: a Mexican consultant, developer, designer, or marketer performs services from Mexico for clients (some US, some not), invoicing through a Wyoming LLC for clean USD banking. The source of services income is generally where the work is performed, not where the client or the bank sits. Work performed in Mexico is foreign-source income to the US, full stop. It is not US-source FDAP, and without a fixed US office, dependent agent, or staff physically working in the US, it is not effectively connected income either. The IRS itself describes ECI as requiring a US trade or business whose activities are "considerable, continuous, and regular." A laptop in Guadalajara does not create that.
So the honest answer for the majority of readers: the treaty's withholding rates are largely irrelevant to your operating revenue, because that revenue is foreign-source and simply outside the US net — you reach the same zero-US-tax result whether or not a treaty exists. The treaty becomes relevant only if your LLC actually receives US-source passive income (say, dividends from a US C-corporation you hold, or US-source royalties), or if your activities cross into a US trade or business. In the PE scenario, Article 7 is your shield: it says your business profits are taxable in the US only to the extent attributable to a US permanent establishment. No PE, no US profits tax — and the treaty raises the bar from the domestic "US trade or business" test to the higher "permanent establishment" test. This is genuinely valuable, but it is protection against US tax, not a refund mechanism. Sources: IRS-Effectively connected income (ECI) and IRS Publication 515.
How to claim: W-8BEN-E line-by-line + Form 8833 if needed
You claim treaty benefits at two possible layers: with the payer (so they withhold less), and on a US return (Form 8833 disclosure, only sometimes required).
The W-8BEN-E. When a US payer is about to send your LLC US-source FDAP income, they should ask for a Form W-8BEN-E before paying. Filed correctly, it drops withholding from 30% to the treaty rate. Because your single-member LLC is disregarded, the form is completed in a slightly counterintuitive way — the IRS instructions tell you to put the owner's status as beneficial owner, with the disregarded LLC named separately. Practically:
- Line 1: the name of the beneficial owner — for a disregarded LLC, this is generally you, the individual member (not the LLC name). Many payers will accept the LLC name with the member identified; follow the current W-8BEN-E instructions.
- Line 2: country of incorporation/organization (United States context aside, the entity line) — leave per instructions for a disregarded entity.
- Line 3: the name of the disregarded entity — your Wyoming LLC's legal name.
- Line 4 (Chapter 3 status): check Disregarded entity (or the owner's status as appropriate).
- Line 5 (Chapter 4 / FATCA status): check the status that fits — typically an Active NFFE for a normal operating business.
- Line 6: your permanent residence address in Mexico (not a US mailbox — a US address can invalidate the treaty claim).
- Line 8: the LLC's US EIN.
- Line 9b: your foreign TIN — your Mexican RFC.
- Part III (lines 14-15): check that you are a resident of Mexico, that you meet the Limitation on Benefits provision, and cite the specific article and paragraph (e.g., Article 12 for royalties at 10%) and the rate claimed.
Sign, date, and send it to the payer — a W-8BEN-E is not filed with the IRS. It is generally valid for three years.
Form 8833. This is a treaty-based return-position disclosure filed with a US tax return under IRC section 6114. The relief here: you do not need Form 8833 merely because you claimed a reduced withholding rate on FDAP income via a W-8BEN-E — the IRS regulations specifically waive disclosure for reduced 30% withholding on interest, dividends, rents, and royalties. You generally do need Form 8833 when you take a more structural position — for example, claiming under Article 7 that you have no US PE and therefore owe no US tax on business profits the IRS might otherwise treat as ECI. The penalty for failing to disclose a required position is $1,000 for an individual ($10,000 for a corporation). If a position requires Form 8833, it is attached to a Form 1040-NR (or 1120-F for a corporation). Sources: IRS About Form 8833 and the IRS Form 8833 instructions (PDF).
Form 5472 + pro-forma 1120 obligation ($25k penalty) regardless of treaty
This is the filing that catches people, and the treaty does nothing to excuse it. A foreign-owned US disregarded entity — which is exactly what your single-member Wyoming LLC is — must file Form 5472 ("Information Return of a 25% Foreign-Owned US Corporation or a Foreign Corporation Engaged in a US Trade or Business") attached to a pro-forma Form 1120 every year in which it has a reportable transaction with the foreign owner or a related party. Reportable transactions are broad: capital you contribute, distributions you take, loans, and amounts paid between you and the LLC all count. In practice almost every active LLC triggers it.
This is an information return, not an income tax return. The pro-forma 1120 carries only the LLC's name, address, EIN, and a few header items; you write "Foreign-owned U.S. DE" across the top, and the real content lives on the attached 5472. You can owe zero US income tax and still be required to file. The penalty for failing to file, filing late, or filing a substantially incomplete Form 5472 is $25,000 — and it can repeat for continued non-compliance after IRS notice. No treaty, including Mexico's, waives this. The filing is due with the 1120 (generally April 15 for calendar-year filers, with a six-month extension available via Form 7004), and because the LLC has no e-file path for a bare pro-forma 1120, it is typically filed by mail or fax to the IRS. Keep contemporaneous records of every reportable transaction — capital contributions, distributions, intercompany loans — because the 5472 requires dollar amounts and the IRS can assess the penalty for an incomplete return, not just a missing one. Source: IRS About Form 5472.
Separately, note FinCEN's Beneficial Ownership Information regime: under the current rule, FinCEN exempted entities formed in the US, so a domestic Wyoming LLC owned by a foreign person is generally not required to file a BOI report — but a foreign-formed entity registered to do business in a US state still can be. Confirm your status before assuming you are exempt. Source: FinCEN Beneficial Ownership Information.
Common mistakes
Assuming the treaty "lowers your tax" on operating income. For service income performed in Mexico, there is usually no US tax to lower — the income is foreign-source. Founders waste money chasing treaty relief they do not need while ignoring the 5472 they do.
Skipping the W-8BEN-E with US payers. If your LLC genuinely receives US-source dividends, royalties, or non-portfolio interest and you have no valid W-8BEN-E on file, the payer must withhold the full 30%. The treaty rate is not automatic — paperwork first.
Putting a US address on the W-8BEN-E. A US permanent-residence address signals you are not entitled to the Mexico treaty rate and can void the claim. Use your Mexican address.
Missing Form 5472 + pro-forma 1120. This is the single most expensive error: a flat $25,000 penalty, owed even with zero US income tax. Do not let "I owe no tax" turn into "I do not need to file."
Ignoring the Mexican side. Mexico's SAT generally treats a US single-member LLC as transparent, so the LLC's income flows to your annual Declaración Anual and is taxed at progressive ISR rates. Forgetting to declare it in Mexico — or tripping Mexico's controlled-foreign-entity (REFIPRES) rules — is a real risk. The US treaty does not change your Mexican filing duty.
Forgetting the 1099-K is informational. US platforms (Stripe, PayPal, marketplaces) issue Form 1099-K when payments exceed more than $20,000 AND 200 transactions — the planned $600 threshold was repealed by the One Big Beautiful Bill Act. A 1099-K reports gross flow; it is not a tax bill, and it does not override the source rules above. Receiving one does not mean the US is taxing you; it means a platform reported your gross processing volume to the IRS.
Treating the LLC itself as the treaty beneficiary. The treaty looks through a disregarded LLC to its member. The LLC has no residency of its own for treaty purposes, which is exactly why your W-8BEN-E names you (or your individual status) as beneficial owner and your Mexican RFC as the foreign TIN. Founders who try to claim benefits "for the LLC" misread how disregarded entities interact with treaties.
Confusing US withholding with Mexican tax. Reducing US withholding to 0-10% via the treaty does not reduce your Mexican ISR. Mexico taxes its residents on worldwide income; the treaty's double-taxation article (Article 24) lets you credit US tax actually paid against your Mexican liability, but the underlying income is still reported and taxed in Mexico. Plan around the Mexican rate, not just the US one.
WyomingLLC.xyz forms Wyoming LLCs for non-US founders at a flat $397 all-inclusive (the Wyoming state filing fee is included). Need a US tax number? ITIN service is a separate $297 add-on. We are a formation service, not your tax adviser — confirm treaty positions with a cross-border CPA before filing.