EIN for Argentine LLC Owners: The Rule That Treats Your LLC Differently From a Corporation

Three things before you apply. First, your LLC needs state approval -- applying before formation is complete is a common, avoidable delay. Second, keep your Argentine DNI or passport accessible in case the IRS requests identity verification during a fax or phone follow-up. Third, settle on a mailing address for the CP 575 confirmation letter -- an Argentine home address works, though many founders use a US virtual mailbox for faster, trackable delivery. Worth starting early: a clear annual accounting of the LLC's profit under a method your Argentine accountant can work with, since the attribution rule above generally does not wait for a distribution before Argentine tax questions arise.

The application process itself does not vary by country. Argentine founders use the same three non-resident routes as everyone else, since the IRS's online EIN system requires an SSN, ITIN, or US legal residence most applicants do not have. Fax is the most reliable method: complete Form SS-4 and send it to 855-215-1627 if faxing from within the US, or 304-707-9471 from outside -- i.e., from Argentina -- with real-world turnaround commonly running one to two weeks despite the IRS's official four-business-day target. Phone, at 267-941-1099, is open to international applicants Monday through Friday, 6:00 AM to 11:00 PM US Eastern Time; Argentina runs one to two hours ahead of Eastern depending on the season, one of the more convenient time-zone alignments in this series. Mail, at four to five weeks, is the slowest option and rarely worth choosing over fax.

A few fields on Form SS-4 consistently cause delays for non-resident applicants generally, Argentine founders included. Line 7b asks for the responsible party's SSN, ITIN, or EIN -- if you have none of these, the IRS's own instructions say to write Foreign or N/A, not leave the field blank, since a blank Line 7b is one of the most common reasons non-resident applications bounce back for correction. Lines 4a-4b need your full Argentine mailing address spelled out with Argentina written in full, since that is where your EIN confirmation letter, Form CP 575, will be mailed if you apply by post. Line 9a asks about entity classification -- accepting the default disregarded-entity status is standard for most single-member LLCs and does not change how ARCA classifies the LLC under the non-share-capital rule above, since Argentina's test looks at the entity's own legal structure rather than the US tax election.

Once issued, your EIN arrives with a confirmation letter, Form CP 575, sent by fax, mail, or both depending on your application method -- keep it permanently, since banks and payment processors will ask for it during account opening. A lost CP 575 cannot be reissued, but the IRS will provide an EIN Verification Letter, Form 147C, as a substitute for any future banking or tax need. From here, most Argentine founders move on to opening a US bank account -- Mercury and Relay both work for Argentina-based founders, since Argentina is not on either provider's restricted list -- and, since almost every non-resident-owned single-member LLC counts as a foreign-owned disregarded entity, filing Form 5472 alongside a pro forma Form 1120 annually, regardless of whether the LLC had US activity that year. The $25,000 minimum penalty for missing that filing is a separate obligation to the IRS, independent of anything owed to ARCA.

If a formation service is handling your EIN application, confirm that the responsible party listed on Line 7a is you, the actual owner -- not a staff member at the formation company. The IRS defines the responsible party as whoever ultimately owns or controls the entity's funds and decisions, identified by their real name and passport-based nationality. An EIN record that lists someone other than the actual owner creates a mismatch that can complicate matters later if a bank or payment processor needs to verify beneficial ownership, which is the same information reported separately under BOI/FinCEN rules. If a provider suggests listing anyone but you, treat it as a red flag rather than a convenience, regardless of how routine it sounds.

Argentina's international tax transparency regime, transparencia fiscal internacional, treats a US LLC differently from how it treats a typical foreign corporation, and the difference comes down to a technical detail: whether the foreign entity's capital is represented by shares. Under Article 130 of the Ley de Impuesto a las Ganancias, reformed by Ley 27.430 effective 2018, a share-based foreign corporation only has its profits attributed to an Argentine resident owner if three conditions are met together: the Argentine resident controls it, the entity lacks real economic substance or earns mostly passive income, and the entity pays foreign tax below 75% of what the equivalent Argentine tax would be -- a threshold that works out to roughly 18.75%. Entities whose capital is not represented by shares -- and Argentine tax commentary explicitly names LLCs, LLPs, and similar structures in this category -- have historically been treated under a more direct rule: the entity's taxable profit for the year, calculated under its home country's accounting rules, is attributed straight to the Argentine member in proportion to their ownership share, without needing to separately satisfy the three-part test that applies to share-based corporations. In practice, this means a US LLC's Argentine owner should not assume the more forgiving corporate test is what applies to them -- membership-interest structures have generally sat in the stricter, automatic-attribution category from the start. The 2018 reform reworked significant parts of this framework, and how it currently treats non-share entities specifically is exactly the kind of question worth confirming with an Argentine contador rather than assuming based on pre-2018 commentary. None of this changes what Form SS-4 asks for -- the IRS has no interest in Argentine share-versus-membership-interest distinctions -- but it does shape when Argentine tax comes due on your LLC's profits.

Beyond income tax, Argentine tax residents face Bienes Personales, an annual wealth tax on worldwide assets held as of December 31 -- and an ownership interest in a foreign LLC counts as a taxable asset for this purpose. A 2024 reform reshaped this tax in a way that generally favors founders holding foreign structures: it merged the rates so that domestic and foreign assets are taxed on the same unified scale, removing an older surcharge that had specifically penalized offshore holdings, and set rates on a declining path from a 0.5% to 1.0% range down toward a single 0.25% rate by 2027. The non-taxable minimum sits in the hundreds of millions of pesos and is adjusted periodically, so whether it applies to a given founder depends on their total worldwide asset position, not the LLC alone. This filing runs independently of the income-tax attribution question above -- a founder whose LLC profits are attributed under the non-share-capital rule still separately reports the LLC's value under Bienes Personales if their total worldwide assets clear the threshold.

Two structural facts shape the bigger financial picture for an Argentine founder. First, there is no comprehensive income tax treaty between the United States and Argentina, so double taxation is addressed through Argentina's unilateral foreign tax credit rules rather than treaty relief -- worth factoring in when estimating combined US and Argentine tax on the same LLC profits. Second, Argentina's central bank, BCRA, has maintained foreign exchange controls known as the cepo cambiario since 2019, restricting access to US dollars; these controls were partially eased for individuals starting in April 2024, though the specifics of what is and is not permitted have shifted more than once and continue to evolve. Neither of these facts affects your EIN application directly, but both affect the practical mechanics of funding the LLC from Argentina and eventually bringing profits home, and both are worth checking for current status rather than relying on information that may be a policy cycle out of date.

It is worth understanding the three-part test even though it generally does not apply to a membership-interest LLC, since it explains why the rules read differently for founders comparing notes with friends who hold a foreign corporation instead. That test asks whether the Argentine resident controls the entity, whether the entity lacks genuine economic substance or derives most of its income from passive sources like interest, royalties, or rent, and whether the foreign tax paid is below roughly 18.75% -- a rate low enough that jurisdictions with meaningfully lower corporate tax than Argentina's 25% baseline can trigger it. A share-based holding company parked in a low-tax jurisdiction earning passive investment income is squarely what this test targets. An operating US LLC selling software, services, or products to customers looks nothing like that fact pattern -- but because the LLC's structure already places it in the direct-attribution category by virtue of not having share capital, the active-versus-passive income distinction that would otherwise help a founder avoid attribution carries less weight than it does for share-based entities elsewhere in this series.

A few mistakes show up repeatedly. Assuming the three-part corporate test -- control, passive income, low foreign tax rate -- is what determines attribution for an LLC, when membership-interest structures have generally sat in a more direct, automatic-attribution category since the entity does not have share capital. Assuming that because the LLC runs an active business rather than holding passive investments, no Argentine tax question arises at all, when the non-share-capital rule does not turn on that distinction the way the corporate test does. Treating Bienes Personales as resolved simply because the LLC's profits were already reported under income tax, when the wealth tax is a separate annual obligation on the asset's value. Assuming currency-control rules from a few years ago still apply unchanged, when BCRA's restrictions have been eased more than once since 2024 and continue to shift. And, as with every non-resident applicant regardless of country, leaving Line 7b of Form SS-4 blank instead of writing Foreign, which remains one of the most frequent reasons the IRS returns a non-resident application for correction.