EIN for New Zealand LLC Owners: The One Tax Test Most Solo Founders Actually Pass

Three things before you apply. First, your LLC needs state approval -- applying before formation is complete is a common, avoidable delay. Second, keep your NZ passport or driver licence 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 NZ home address works, though many founders use a US virtual mailbox for faster, trackable delivery. Worth tracking from day one: the LLC's mix of active versus passive income, since that ratio is exactly what determines which IRD test your LLC falls under, covered further down.

The application process itself does not vary by country. New Zealand 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 New Zealand -- 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; New Zealand runs 16 to 18 hours ahead of Eastern depending on daylight saving, which puts the practical calling window in the New Zealand morning of the following day -- one of the more favorable time-zone alignments in this series, if an odd one to plan around at first. 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, New Zealand 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 New Zealand mailing address spelled out with New Zealand 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 it has no bearing on IRD's own classification of the LLC as a foreign company, since the two tax authorities apply entirely separate tests.

This is the section most solo founders reading this page actually want: New Zealand's CFC rules include an active business test that exempts a controlled foreign company from income attribution entirely if its passive, or attributable, income makes up less than 5% of its total income. Passive income for this purpose covers things like dividends, interest, royalties, and rent -- not the revenue a typical SaaS, e-commerce, agency, or consulting LLC earns from selling a product or service to customers. An LLC whose income is genuinely trading or service revenue, with only incidental interest on a business bank account, will usually clear this test comfortably, making it a non-attributing active CFC. The practical result: no annual CFC income attribution, and no New Zealand tax due on the LLC's profits until you actually take money out as a dividend. This is a meaningfully lighter outcome than the entity-level residency risks or strict staff-and-premises substance tests some other countries in this series apply -- New Zealand's test is a straightforward income-mix calculation, not a subjective assessment of where decisions get made. Founders running a mixed business -- some consulting revenue alongside meaningful royalty or licensing income, for instance -- should not assume the test is automatically met just because the core business feels active; run the actual percentage rather than relying on how the business feels day to day.

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 New Zealand founders move on to opening a US bank account -- Mercury and Relay both work for NZ-based founders, since New Zealand 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 applies independently of anything owed to, or disclosed to, IRD.

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.

For most readers of this page, the CFC rules apply, not the FIF rules -- a distinction worth getting right early, since the two attach very different compliance obligations. A foreign company counts as a CFC when five or fewer New Zealand residents hold 50% or more of it, or when a single New Zealand resident holds 40% or more with no other unrelated party also at 40% or more. A single-member LLC that you own entirely clears that bar immediately. The FIF regime, by contrast, is generally aimed at portfolio-style, non-controlling interests -- shareholdings below the CFC control thresholds -- and its well-known 50,000 New Zealand dollar de minimis threshold is most relevant to investors holding minority stakes across several foreign entities, not a founder who owns their own LLC outright. In practice, once your LLC clears the CFC threshold, it is assessed under the CFC regime rather than separately under FIF, which simplifies the question even if the underlying rules themselves are detailed.

A few mistakes show up repeatedly. Assuming the 50,000 New Zealand dollar FIF threshold applies to a wholly-owned LLC, when a 100%-owned single-member LLC is almost always assessed as a CFC rather than under the FIF regime, making that particular threshold irrelevant to most readers of this page. Skipping the annual CFC disclosure because the active business test exempted the LLC from income attribution, when disclosure and attribution are separate obligations. Not tracking the LLC's passive-versus-active income split carefully enough to confirm the 5% threshold is genuinely met, especially once a growing LLC starts holding meaningful cash balances that generate incidental interest. 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.

Funding the LLC itself involves no New Zealand-side friction -- the New Zealand dollar floats freely, there is no central-bank approval process, and no annual remittance ceiling applies to sending money abroad to fund a foreign business, unlike the capped or prior-approval regimes covered elsewhere in this series. The compliance obligation that does apply, regardless of whether the active business test exempts you from income attribution, is disclosure: IRD requires CFC interests to be disclosed annually, typically alongside your Individual tax return (IR3), and failing to disclose can trigger penalties even when no tax is ultimately owed on the LLC's income. This disclosure requirement is separate from, and does not depend on, the outcome of the active business test above -- passing that test changes what you owe, not whether you need to tell IRD your LLC exists.

New Zealand's Inland Revenue has done something few tax authorities bother with: it published a specific set of binding Public Rulings dealing with US LLCs by name. Originally issued in 2020 as BR PUB 20/01 to 20/05 and reissued in 2023 as PR PUB 23/09 to 23/13, these rulings settle a question that trips up founders in many other countries -- how does the home jurisdiction classify an entity the IRS treats as fiscally transparent? IRD's answer for a US LLC is unambiguous: for New Zealand tax purposes, the LLC is treated as a foreign company, not a partnership or a disregarded pass-through, regardless of how the IRS classifies it on your Form SS-4. That classification decision is what determines which of New Zealand's two overseas-investment regimes applies to your interest in the LLC -- the Controlled Foreign Company (CFC) rules or the Foreign Investment Fund (FIF) rules -- and the two produce meaningfully different outcomes, covered in the sections below. None of this changes your IRS paperwork; Form SS-4 has no field for IRD's classification of the entity. But because IRD has already done the work of publishing exactly how it treats this specific structure, a New Zealand founder is in an unusually well-documented position compared to founders in countries where this question has never been formally settled by the tax authority. There is one more layer worth knowing, even though it rarely needs to be invoked for an active-business LLC: the fiscal-transparency and double-tax-relief provisions in Articles 1(6) and 22 of the New Zealand-US double tax agreement specifically address situations where the two countries classify the same entity differently -- transparent in the US, a company in New Zealand -- so that a New Zealand resident does not end up paying full tax in both countries on the same LLC profits. This mechanism exists precisely because of the classification mismatch described above, and having it written into the treaty is another sign of how thoroughly this specific structure has already been considered by both tax authorities.