Form 5471 Filing Requirements for a Canadian Corporation

A US citizen or US resident, green card holders included, who controls a Canadian corporation, or owns 10% or more of one that’s a controlled foreign corporation, generally files Form 5471 every year, attached to their US return and due with it, extensions included. Which pages and schedules you complete depends on your filer category. Missing the form carries a $10,000 penalty per corporation per year, and it keeps the IRS’s time to assess that year open. If you only need a yes or no on your own situation, the quick Form 5471 test for owners is shorter.

Who has to file Form 5471?

Five categories of US persons file, defined in the Form 5471 instructions (Rev. December 2025). For an owner of a Canadian corporation, the ones that usually matter are Category 4, control of the company, and Category 5, being a 10% shareholder of a controlled foreign corporation (CFC). Category 3 catches the year you cross a 10% line, and Category 2 catches certain officers and directors.

Category	Who it covers	Ownership test
1	A US shareholder of a section 965 specified foreign corporation	10% or more of vote or value; a leftover from the 2017 transition tax
2	A US citizen or resident who’s an officer or director when a US person acquires a stake	A US person acquires 10% or more, or an additional 10% or more
3	A US person who acquires stock, becomes a US person, or sells down	Reaching 10% on an acquisition, becoming a US person while at 10%, or dropping below 10%
4	A US person who had control during the corporation’s annual accounting period	More than 50% of total voting power or of total value, at any time during your tax year
5	A US shareholder of a CFC who owned the stock on the last day it was a CFC	10% or more of vote or value, counting constructive ownership

A CFC, under IRC 957(a), is a foreign corporation where US shareholders own more than 50% of the vote or value “on any day during the taxable year.” A US shareholder, under IRC 951(b), is a US person with 10% or more, and section 958(b) attribution counts, so a spouse’s shares can make you one if your spouse is a US citizen or resident. Shares owned by a nonresident alien spouse aren’t attributed to you under section 958(b)(1), and the instructions excuse a Category 4 or 5 filer caught only through constructive ownership from a nonresident alien. The quick Form 5471 test puts the spouse case in its decision table.

Category 5 has three types. Category 5a is the ordinary case for a Canadian owner-manager. Categories 5b and 5c cover certain unrelated or constructive shareholders of a foreign-controlled CFC and file less. For Category 4 only, “US person” also includes a nonresident alien with an election in effect under section 6013(g) or (h), so the joint-return election in a move year can bring the form with it. If you meet both Category 4 and 5a, the instructions say to check only the Category 4 box.

What schedules does each category file?

The instructions carry a chart of what each category completes, and the controlling owner files the most. If you’re the sole owner of a CFC, you’re in Categories 4 and 5a, and the instructions tell you to “complete all six pages of Form 5471 and separate Schedules E, G-1, H, H-1, I-1, J, M, P, Q, and R.” A schedule that applies but shows only zeros still gets filed.

Schedule	What it reports	Category 3	Category 4	Category 5a
A and B, Part I	The corporation’s stock and its US shareholders	Yes	Yes	No
B, Part II	Direct shareholders of the foreign corporation	Yes	Yes	Yes
C and F	Income statement and balance sheet	Yes	Yes	No
E (with E-1)	Foreign income taxes paid or accrued	No	Yes	Yes
G and G-1	Other information; G-1 for cost sharing arrangements	Yes	Yes	Yes
H	Current-year earnings and profits	No	Yes	Yes
I and I-1	Your share of subpart F income; CFC-level figures for the section 951A inclusion	No	Yes	Yes
J	Accumulated earnings and profits	No	Yes	Yes
M	Transactions during the corporation’s year, filed by the controlling US person	No	Yes	No
O, Part II	Organization, reorganization and stock acquisitions	Yes	No	No
P	Previously taxed earnings and profits (PTEP)	No	Yes	Yes
Q	CFC income, deductions, taxes and assets by income group	No	Yes	Yes
R	Distributions from the foreign corporation	No	Yes	Yes

Two footnotes from the chart change real filings. Schedule H-1, for corporate alternative minimum tax, is required only for a US shareholder that’s an applicable corporation for CAMT purposes, so an individual owner generally won’t have one. A Category 2 filer completes only page 1’s identifying information and Schedule O, Part I. Every exchange rate on the form is reported using the instructions’ “divide-by convention,” as units of foreign currency per US dollar, rounded to at least four places.

When is Form 5471 due?

Form 5471 has no deadline of its own. The instructions say to “attach Form 5471 to your income tax return … and file both by the due date (including extensions) for that return,” so for an individual it rides with the Form 1040 and its extension. You file a separate Form 5471, with its schedules, for each foreign corporation, and it’s due every year the category applies.

Where two or more people must report the same corporation for the same period, one person with the same or greater filing requirements can file a joint Form 5471 for the others. Each of them still attaches a statement to their own return, and Category 1a, 1b, 4, 5a and 5b filers also attach their own separate Schedule P. For Category 3 the joint filer must hold an equal or greater interest.

What’s the penalty for not filing Form 5471?

The base penalty is $10,000 for each annual accounting period of each foreign corporation, owed whether or not any tax is due. IRC 6038(b) charges it for the Category 4 and 5 information, and IRC 6679 charges $10,000 for a missed section 6046 return (Categories 2 and 3) “unless it is shown that such failure is due to reasonable cause.” Both add continuation penalties after an IRS notice.

Layer	Amount	Source
Base penalty	$10,000 per annual accounting period, per foreign corporation (section 6038); $10,000 per failure for each reportable transaction (section 6046)	IRC 6038(b)(1); IRC 6679(a)(1)
Continuation	$10,000 per 30-day period, or fraction, once the failure runs more than 90 days after the IRS mails notice, capped at $50,000 more per failure	IRC 6038(b)(2); IRC 6679(a)(2)
Foreign tax credit cut	10% of the foreign taxes available for credit under sections 901 and 960, plus 5% more per 3-month period after the 90 days, within limits	Form 5471 instructions; IRC 6038(c)
Criminal	Sections 7203, 7206 and 7207 may apply	Form 5471 instructions

The IRS international penalties page states it the same way: “a penalty of $10,000 for each failure to file a complete and correct Form 5471 by the due date.” An incomplete form counts, not only a missing one. For relief, Reg. 1.6038-2(k)(3) requires “an affirmative showing of all facts alleged as reasonable cause” in a statement made under penalties of perjury. If the IRS has already assessed, the abatement guide covers the paths after the Tax Court rulings.

Does a missing Form 5471 keep my return open?

Yes. The normal rule in IRC 6501(a) gives the IRS 3 years after a return is filed to assess tax. Section 6501(c)(8) overrides that for information required under sections 6038 and 6046, among others: the time to assess “shall not expire before the date which is 3 years after the date on which the Secretary is furnished the information required to be reported.”

IRC 6501(c)(8)(A) applies to “any tax return, event, or period to which such information relates.” Under (c)(8)(B), if the failure “is due to reasonable cause and not willful neglect, subparagraph (A) shall apply only to the item or items related to such failure.”

On the statute’s words, the open period reaches the return the information relates to, not only the corporation’s items, unless you can show reasonable cause. Each year runs separately: filing this year’s form starts this year’s clock only.

Is there a dormant corporation exception?

There’s a summary filing procedure, not an exemption. The instructions point to Rev. Proc. 92-70, which lets you file a short Form 5471 for a “dormant foreign corporation (defined in section 3 of Rev. Proc. 92-70),” and that summary filing satisfies sections 6038 and 6046. Whether your inactive Canadian company meets that definition is the question to settle first.

If it qualifies, you complete only page 1, labelled at the top “Filed Pursuant to Rev. Proc. 92-70 for Dormant Foreign Corporation,” with your filer information, items A through C, the tax year, the corporation’s annual accounting period and items 1a to 1d. It’s filed the normal way, attached to your return. If you’re keeping a company mostly out of habit, compare that with winding it up.

Does Form 5471 mean I owe US tax on the company?

Not by itself. Form 5471 reports; the tax comes from the CFC rules, which can put some of the corporation’s income on your return before it pays a dividend. Schedule I reports your share of subpart F income, and Schedule I-1 carries the CFC-level figures used for the section 951A inclusion. That inclusion changed name and shape for tax years beginning after 2025.

The Cornell notes to IRC 951A record that Pub. L. 119-21 “substituted ‘Net CFC tested income’ for ‘Global intangible low-taxed income’ in section catchline,” effective for “taxable years beginning after Dec. 31, 2025.” So a 2025 return still deals with GILTI, and a 2026 return with net CFC tested income. What changed in the rename, subpart F income for Canadian corporations and the section 962 election cover the tax side; the CFC overview ties them together.

Related guides

• What Form 5471 costs to prepare, with published firm prices
• What happens to your Canadian corporation when you move to the US, the move-year view
• Form T1134 for a US company, the Canadian filing in the other direction

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.