US Person Owning a Canadian Corporation: Form 5471, CFC Rules, and GILTI

A US citizen or resident who owns a Canadian corporation steps into one of the most complex areas of US international tax. The US does not wait for the Canadian corporation to pay a dividend before taxing its income. Under the controlled foreign corporation (CFC) rules, certain categories of the corporation’s income are taxed to the US shareholder in the year they are earned, regardless of distribution. Since the Tax Cuts and Jobs Act, the global intangible low-taxed income (GILTI) regime taxes most remaining active business income as well. On top of the substantive tax, the US shareholder must file Form 5471 annually, and the penalty for failing to file is $10,000 per form per year.

What is a controlled foreign corporation?

A CFC is a foreign corporation in which “US shareholders” own more than 50% of the total combined voting power or more than 50% of the total value of shares. A “US shareholder” for this purpose is a US person who owns 10% or more of the voting power or value of the corporation, directly, indirectly, or constructively under IRC 958.

For a US citizen living in Canada who owns 100% of a Canadian corporation, the corporation is a CFC. For a US citizen who owns 25% of a Canadian corporation with the remaining 75% owned by Canadian residents who are not US persons, the corporation is still a CFC if the US citizen’s 25% represents more than 50% of the US-shareholder ownership (it does, because the US citizen is the only US shareholder, and their ownership exceeds 10%).

The constructive ownership rules under IRC 318, as modified by IRC 958(b), attribute shares between family members, partners, and through entity chains. A US citizen whose Canadian spouse owns 100% of a Canadian corporation may be treated as owning those shares constructively, making the corporation a CFC.

What is Subpart F income?

Subpart F income (IRC 952) is a category of passive and mobile income that the US taxes currently to the CFC’s US shareholders, regardless of distribution. The main categories:

• Foreign personal holding company income (IRC 954(c)): dividends, interest, rents, royalties, capital gains, and certain commodity and currency gains. A Canadian corporation that holds investments, earns interest income, or collects passive rents generates FPHCI that is taxable to the US shareholder immediately.
• Foreign base company sales income (IRC 954(d)): income from buying or selling personal property where the CFC acts as an intermediary between related parties and the property is manufactured and sold outside the CFC’s country of incorporation. This is less common for Canadian operating companies.
• Foreign base company services income (IRC 954(e)): income from services performed outside the CFC’s country of incorporation for or on behalf of a related person. A Canadian corporation that provides services in the US for a related US entity may generate this type of income.
• Insurance income (IRC 953): underwriting and investment income of a CFC that is engaged in the insurance business.

The same-country exception in IRC 954(c)(3) excludes certain passive income if it is received from a related person organized in the same country as the CFC (both Canadian), which can reduce the Subpart F exposure for intercompany transactions within Canada.

What is GILTI?

GILTI (Global Intangible Low-Taxed Income) under IRC 951A is a catch-all that taxes a CFC’s active business income that exceeds a deemed return on tangible assets. For most Canadian corporations with limited tangible assets (a services company, a consulting firm, a technology company), GILTI captures essentially all of the active business income.

The GILTI calculation: CFC’s tested income (active income not already taxed as Subpart F) minus 10% of the CFC’s qualified business asset investment (QBAI, the adjusted basis of depreciable tangible property). The excess is GILTI, included in the US shareholder’s income.

For an individual US shareholder (a US citizen who owns the Canadian corporation directly), GILTI is taxed at ordinary income tax rates with no deduction. Corporate US shareholders can claim a 50% deduction under IRC 250, effectively halving the GILTI tax rate to 10.5% (or 13.125% after 2025). Individual shareholders do not get this deduction unless they make a Section 962 election.

The Section 962 election: An individual US shareholder can elect under IRC 962 to be taxed on GILTI and Subpart F inclusions as if they were a domestic corporation. This allows the 50% GILTI deduction and the deemed-paid foreign tax credit under IRC 960, which credits the Canadian corporate tax paid by the CFC against the US tax on the GILTI inclusion. The election is made annually on the tax return.

What is Form 5471 and who must file it?

Form 5471 (Information Return of US Persons with Respect to Certain Foreign Corporations) is an annual information return filed with the US shareholder’s income tax return. It reports the CFC’s balance sheet, income statement, and intercompany transactions.

Filers are categorized:

• Category 4: US person who had control (more than 50% of vote or value) of a foreign corporation at any time during the year. This captures most US owners of Canadian corporations.
• Category 5: US shareholder of a CFC who owned stock on the last day of the CFC’s tax year.
• Categories 1, 2, 3: apply to various officer/director, acquisition, and disposition scenarios.

Category 4 and 5 filers must complete the most extensive schedules, including Schedule J (accumulated earnings and profits), Schedule I-1 (GILTI), and Schedule P (previously taxed earnings and profits).

Penalties: $10,000 for each annual accounting period for failure to file, reduced to $10,000 even if multiple categories apply. An additional $10,000 for each 30-day period the failure continues after the IRS sends notice, up to $50,000 total per form. The statute of limitations on the entire return does not begin to run until Form 5471 is filed (IRC 6501(c)(8)), meaning the IRS can audit any year indefinitely if Form 5471 was not filed.

The penalty is per form, per year. A US citizen who owns two Canadian corporations and fails to file Form 5471 for both for three years faces $60,000 in potential penalties (2 forms x 3 years x $10,000) before any additional continuing-failure penalties.

How do you reduce the tax burden?

The most effective strategies:

Section 962 election: As shown in the Hypothetical, this election dramatically reduces the GILTI tax for individual shareholders by allowing the deemed-paid foreign tax credit and the 50% GILTI deduction. The election should be evaluated annually based on the CFC’s income, the Canadian tax rate, and the US shareholder’s personal tax situation.

Increase QBAI: GILTI is reduced by 10% of the CFC’s tangible asset base. A CFC with significant depreciable property (equipment, real estate, vehicles) generates a larger QBAI offset. For a capital-intensive Canadian business, the QBAI offset can eliminate most or all of the GILTI inclusion.

Use a US corporate blocker: Instead of owning the Canadian corporation directly, the US person forms a US C-Corporation that owns the Canadian corporation. The US C-Corp is the CFC shareholder and automatically gets the IRC 250 GILTI deduction and the IRC 960 deemed-paid credit, without needing a Section 962 election. The downside: extracting income from the US C-Corp to the individual triggers a second layer of US tax (dividends).

Maximize the Canadian tax rate: GILTI includes a credit for 80% of foreign taxes paid. If the Canadian effective tax rate on the CFC’s income is at least 13.125% (the effective GILTI rate after the 50% deduction, for tax years beginning after 2025), the foreign tax credit fully offsets the GILTI tax. The Canadian general corporate rate (26.5% combined federal/Ontario) far exceeds this threshold, so GILTI is primarily a problem for income taxed at the Canadian small business rate (12.2%), which falls below the GILTI threshold.

What are the other reporting requirements?

Beyond Form 5471, a US person who owns a Canadian corporation may face:

• Form 8865 (Return of US Persons with Respect to Certain Foreign Partnerships): if the Canadian corporation owns or participates in foreign partnerships.
• Form 8938 (FATCA): the Canadian corporation shares may be a specified foreign financial asset if held directly.
• FBAR (FinCEN 114): Canadian bank accounts of the corporation may be reportable if the US shareholder has signatory authority.
• Form 926 (Return by a US Transferor of Property to a Foreign Corporation): filed when the US person transfers property to the Canadian corporation (a capital contribution, for example).
• Form 8992 (US Shareholder Calculation of Global Intangible Low-Taxed Income): used to compute the GILTI inclusion amount.
• T1134 (Canadian): if the US person is also a Canadian resident, they file T1134 reporting the foreign affiliate (the Canadian corporation is not foreign from the Canadian perspective, so T1134 applies to any other foreign corporations in the chain).

Related guides:

• CCPC with a US shareholder, how Canadian integration breaks when a US person owns the shares

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