Form 5472 for Canadian LLC Owners: US-Canada Filing Guide

Thousands of Canadians form US LLCs each year — through Stripe Atlas, doola, or directly in Wyoming, Delaware, or New Mexico — to sell on Amazon, run a SaaS, do consulting, or accept Stripe payments in US dollars. The moment that LLC is owned by a non-US person who holds at least 25%, it falls under Internal Revenue Code section 6038A, and Form 5472 enters the picture.

A single-member LLC owned 100% by one Canadian is the most common case. The IRS treats it as a disregarded entity for income tax, but final regulations effective for tax years beginning on or after January 1, 2017 (Treasury Decision 9796) treat it as a corporation solely for the section 6038A reporting and record-keeping rules. That is why a Canadian founder with no US tax to pay still has a US form to file.

If you are unsure whether your situation triggers the form, the do I need to file qualifier walks through it in about a minute, and the foreign-owned single-member LLC guide explains the exact entity most Canadian founders hold.

This is the single most misunderstood point for Canadian founders. People assume that because the LLC made no money, or because they paid Canadian tax already, there is nothing to file in the US. Form 5472 does not work that way. It is an information return: it discloses money moving between the US company and its foreign owner. The trigger is the movement, not the margin.

In a typical first year, a Canadian founder deposits a few hundred or a few thousand dollars to open the LLC's bank account and pay its registered-agent and state fees. That deposit is a capital contribution — a reportable transaction reported in Part V/VI of Form 5472. So even an LLC that earned $0 in revenue almost always has a reportable transaction and must file.

For a Canadian-owned single-member LLC, the related foreign party is usually you, the owner, and sometimes a Canadian company you also control. Almost any dollar moving between you and the LLC is reportable.

Because forming and funding the LLC always moves money from the owner, virtually every Canadian-owned single-member LLC has at least one reportable transaction in year one. The capital contribution guide covers the most common trigger in detail.

Form 5472 cannot be mailed on its own. The regulations require it to be attached to an income-tax return, and the only return available to a disregarded entity is a pro forma Form 1120. “Pro forma” means a formality — the 1120 here is a cover sheet, not a tax computation.

You complete the identification block at the top of page 1: the LLC's legal name, US mailing address, EIN, and date and state of formation. You write “Foreign-owned U.S. DE” across the top margin. Every income, deduction, and tax line stays blank, because a disregarded entity pays no entity-level US income tax. The completed package is one pro forma 1120 with one Form 5472 attached. The Form 5472 and pro forma 1120 guide shows the full package, and the pro forma 1120 page explains the cover return line by line.

Every Form 5472 filing needs the LLC's EIN (Employer Identification Number). The IRS online EIN tool requires a US taxpayer ID, which most Canadians do not have, so the route for a non-resident is Form SS-4submitted by fax or mail. On line 7b — “SSN, ITIN, or EIN” of the responsible party — a Canadian without a US tax ID writes “Foreign”.

You do not need an ITIN or SSN to obtain the LLC's EIN. The EIN belongs to the company, not the person. Once the EIN is assigned, it goes on the pro forma 1120 and on Form 5472.

Form 5472 carries one of the harshest information-return penalties in the US tax code, and it applies to a Canadian owner exactly as it does to anyone else. The base penalty is $25,000 for each form not filed, filed late, or filed substantially incomplete. Because there is no statute of limitations on an unfiled information return, a year you missed five years ago can still be assessed.

A Canadian founder who ignored the form for three years could face $75,000 or more. The Form 5472 penalty guide and the penalty calculator show exposure by number of unfiled years.

The extension only moves the filing deadline. For a disregarded entity there is no entity-level US tax to pay, so there is nothing else to extend. File Form 7004 by April 15 to claim the six-month extension; see the Form 5472 deadline page for full timing details.

There is no e-file path for a foreign-owned disregarded entity filing a pro forma 1120, and that includes Canadian owners. Tax software that e-files normal corporate returns will not transmit this package. The only two accepted methods are mail and fax.

From Canada, an international courier or certified mail both work for the mailing route; the fax route is often faster and gives an instant confirmation page. Because timely filing is the only defense against the $25,000 penalty, keep dated proof. The how to file Form 5472 guide walks through the full process.

Canadian founders often ask whether the treaty makes Form 5472 unnecessary. It does not. The treaty governs income tax — which country taxes which income, and at what rate. Form 5472 is a disclosure requirement under section 6038A. It carries no tax computation, so there is nothing for a treaty to relieve. The $25,000 penalty for not filing applies regardless of treaty status.

The US LLC mismatch issue for Canadians

There is a well-known wrinkle on the Canadian side that is separate from Form 5472. The US generally treats a single-member LLC as a flow-through (disregarded) entity, while Canada has historically been reluctant to treat a US LLC the same way and may view it as a corporation. That mismatch can create complications for foreign tax credits and how LLC income is taxed in Canada. This is a personal cross-border tax question that turns on your facts, and you should discuss it with a licensed cross-border tax advisor (a Canadian CPA or US-Canada specialist).

To be clear about scope: form5472.tax does not represent clients before the IRS and does not give personal Canadian or US income-tax advice. We prepare and file the US information return — Form 5472 with the pro forma 1120. For treaty positions, LLC characterization, and your personal return, use a licensed tax attorney, CPA, or EA who handles US-Canada matters.

Beneficial Ownership Information (BOI) reporting under the Corporate Transparency Act caused a lot of confusion for foreign founders. The current position is clear: a FinCEN interim final rule from March 2025 exempts entities formed in the United States from BOI reporting. A Canadian-owned Wyoming, Delaware, or New Mexico LLC is US-formed, so it does not file BOI.

Do not let the BOI exemption lull you into skipping Form 5472 — they are completely different filings run by different agencies. See the BOI vs Form 5472 comparison for the full distinction.

Form 5472 is only half of the section 6038A obligation; the statute also imposes a record-keepingduty. A Canadian-owned LLC must keep permanent books that substantiate the amount and nature of each reportable transaction with the owner or any related Canadian party.

If the IRS examines the entity and the records are missing, a separate $25,000 penalty applies for failure to maintain records — on top of any failure-to-file penalty. Clean records turn a stressful audit into a routine document request. The LLC annual compliance guide lists everything to keep each year.

Most penalties do not come from fraud; they come from avoidable errors by founders who did not know the US rules. The five below cause the overwhelming majority of problems for Canadian owners.

Each is preventable. A specialist who files Form 5472 every day catches all five automatically — the reason most Canadian founders pay $299 rather than risk a $25,000 penalty on a DIY attempt.

The W-8 series often appears in a Canadian founder's life because a US platform or bank asks for it. Form W-8BEN is for a Canadian individual; Form W-8BEN-E is for a Canadian entity. They certify that the recipient is foreign and can claim a reduced treaty withholding rate on certain US-source payments.

Key point: a W-8 goes to the payer, not the IRS, and it does not satisfy Form 5472. See the W-8BEN guide and the W-8BEN vs W-8BEN-E comparison to pick the right one.

The two forms are mirror images and constantly confused. The simplest rule: 5472 = foreign money into a US company; 5471 = US person into a foreign company. A Canadian owner of a US LLC is the first case.

See the full 5472 vs 5471 comparison if you also have US ties that could pull you into 5471 territory — for most Canadian founders, only Form 5472 applies.

Many Canadian founders discover Form 5472 only after running their LLC for two or three years. The good news is that the obligation never expires, so it is always possible to come into compliance; the bad news is the same fact — because there is no statute of limitations on an unfiled information return, an old year you skipped remains assessable indefinitely. The fix is to file each missed year on its own pro forma 1120 with Form 5472 attached, for the correct tax year.

A reasonable-cause statement explaining why the Canadian owner did not know about the form can support penalty relief, but it must be truthful and is decided by the IRS case by case. The Form 5472 catch-up filing guide and the missed Form 5472 page explain the process. To be clear about scope, form5472.tax does not represent clients before the IRS; we prepare and file the back-year returns, and for contested penalties you should engage a licensed tax attorney, CPA, or EA.

Form 5472 asks for the foreign owner's US taxpayer identification number, but most Canadian owners do not have an SSN or ITIN — and the form does not require them to get one. Instead, the instructions allow a self-assigned reference ID number to identify the 25% foreign shareholder. The key rule is consistency: once you choose a reference ID for the Canadian owner, you must use the identical value on every future Form 5472 so the IRS can match filings across years.

The reference ID identifies the owner; the LLC's EIN identifies the entity. They are different fields. The reference ID number guide shows exactly where each goes on the form, and the Form 5472 instructions walk through every line a Canadian owner completes.

DIY is free but unforgiving: the $25,000 penalty applies even to an honest mistake or a missed deadline. For a flat $299, form5472.tax prepares Form 5472 and the pro forma 1120, has a specialist review it, and files it the correct way — saving $248 versus form5472.online and up to $1,700 versus doola.

If you currently pay doola or Firstbase a yearly compliance fee, the switch from doola or Firstbase page shows how to move the same filing for $299. We file the US information return; for personal Canadian and US income-tax advice, use a licensed cross-border CPA or tax attorney.