EIN for Canadian LLC Owners: Why CRA Sees a Corporation Where the IRS Sees Nothing At All

Three things before you apply. First, your LLC needs state approval -- applying before formation is complete is a common, avoidable delay. Second, keep your Canadian passport or driver's 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 -- a Canadian home address works, though many founders use a US virtual mailbox for faster, trackable delivery. Worth deciding early, given the corporation-not-partnership treatment above: how and when you plan to take distributions from the LLC, since that timing is what actually triggers Canadian tax under CRA's framework.

The application process itself does not vary by country. Canadian 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 Canada -- 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; most of Canada shares Eastern or a nearby time zone, making this one of the most convenient calling windows 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, Canadian 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 Canadian mailing address spelled out with Canada 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 -- your answer here matters for US purposes, but as covered above, it has zero bearing on how CRA classifies the same LLC, since Canada's corporation treatment applies regardless of the US 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 Canadian founders move on to opening a US bank account -- Mercury and Relay both work for Canada-based founders, since Canada 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 the CRA separately requires.

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.

Because a US LLC is a hybrid entity from the treaty's perspective -- fiscally transparent under US law but treated as opaque by Canada -- claiming Canada-US treaty benefits on payments involving the LLC generally requires Form NR303, a declaration of eligibility for treaty benefits specifically designed for hybrid entities. This adds an extra administrative step that founders working with genuinely foreign corporations, or with LLCs owned by residents of most other countries in this series, do not need to navigate. Only US residents can generally claim treaty-based positions under the Canada-US treaty, which is worth keeping in mind if you assumed the treaty would automatically smooth over cross-border payments simply because one exists.

There is a more severe version of the classification question worth knowing about if you personally run every aspect of the LLC from Canada. CRA generally treats a corporation as Canadian-resident if its central management and control -- where the real strategic decisions are made -- sits in Canada, regardless of where it was legally formed. Since CRA already treats a US LLC as a corporation by default, a solo founder who forms a Wyoming or Delaware LLC and personally makes every decision from home in Canada is a plausible candidate for this test, not just a hypothetical one. If the LLC is found to have its central management and control in Canada, the consequence is significant: it can be treated as a Canadian-resident corporation subject to full Canadian corporate tax on its worldwide income, not merely taxed on distributions the way a genuinely foreign corporation would be. Demonstrating that key decisions, record-keeping, or operational control genuinely sit outside Canada is the kind of fact pattern worth documenting proactively rather than reconstructing after the fact.

A few mistakes show up repeatedly. Assuming the LLC's US disregarded-entity status means Canada also treats it as transparent, when CRA classifies every US LLC as a corporation regardless of the US election. Assuming Canadian tax deferral until distribution is a clean benefit, without accounting for the US-side timing mismatch that can result in double taxation the treaty does not resolve. Running every decision for the LLC personally from Canada without considering the central-management-and-control test, which could deem the LLC itself Canadian-resident for tax purposes. Assuming the January 2026 hybrid mismatch consultation proposals are already final law, when they remain in consultation and generally would not apply until payments made on or after July 1, 2026. 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.

This is a genuinely current development worth tracking closely. On January 29, 2026, Canada's Department of Finance released draft legislative proposals for consultation that would broaden the existing hybrid mismatch rules in the Income Tax Act to cover hybrid entity arrangements specifically -- and the proposals explicitly name US LLCs and partnerships that have elected corporate US tax treatment as exactly the kind of structure that creates hybridity, since the US check-the-box regime is what makes this mismatch common. Under the proposed rules, if a Canadian resident makes a deductible payment connected to this kind of hybrid arrangement, that deduction can be denied under what the proposals call the Primary Rule. These proposals are set to generally apply to payments arising on or after July 1, 2026, and remain in the consultation stage as of the most recent available information, so the exact final form is not yet settled. This is more likely to matter for founders with more complex cross-border payment flows than a single founder simply funding their own LLC, but it is worth watching if your structure grows to include related-party payments between a Canadian entity and the US LLC.

Canada takes a fundamentally different starting position on US LLCs than almost every other country in this series. The Canada Revenue Agency does not treat a US LLC as a fiscally transparent, pass-through entity at all -- it treats it as a corporation, full stop, regardless of whether the LLC keeps its default disregarded-entity status or elects corporate treatment via the US check-the-box rules. The CRA has confirmed directly that checking or not checking that US box makes no difference to how Canada classifies the entity. On its face, this sounds like it might defer Canadian tax the way a real corporation would -- Canadian tax generally does not apply until the LLC actually distributes profits, which are then treated as dividends to the Canadian member. The complication is what happens on the US side during that same gap: the IRS taxes a disregarded LLC's income to the owner as it is earned, not when distributed. That creates a genuine timing mismatch -- US tax due currently, Canadian tax deferred until distribution -- and the Canada-US tax treaty does not resolve it, because the mismatch comes from a difference in entity classification rather than overlapping claims on the same income at the same time. None of this changes what Form SS-4 asks for -- the IRS has no field for CRA's classification of the entity -- but it is worth understanding before assuming the LLC's US tax simplicity carries over cleanly to how Canada sees the same structure.