The US LLC Tax Trap for Canadians: Why a Disregarded Entity Creates Double Taxation

A single-member US LLC is one of the most common, and most damaging, tax structures a Canadian resident can hold. In the US, the LLC is a “disregarded entity” for federal tax purposes: it does not file its own return, and its income flows directly to the owner’s personal return. In Canada, the CRA treats the LLC as a foreign corporation, because it has limited liability and a separate legal existence under state law. This mismatch means the LLC’s income is taxed as personal income in the US (at rates up to 37%) but treated as corporate income in Canada (eligible only for the foreign affiliate rules or the foreign accrual property income regime). The foreign tax credit mechanism that normally prevents double taxation breaks down, because the two countries are taxing different taxpayers on different characterizations of the same income.

Why does the mismatch exist?

The US and Canada classify entities differently. For current guidance, see IRS LLC guidance. The US uses a “check-the-box” system under Reg 301.7701-3, which allows most domestic entities to elect their classification. A single-member LLC defaults to a disregarded entity (taxed as a sole proprietorship). A multi-member LLC defaults to a partnership. Either can elect to be taxed as a corporation, but most do not.

Canada does not have a check-the-box system. The CRA classifies foreign entities based on their legal characteristics. An LLC has limited liability, can have perpetual existence, and is a separate legal person under state law. These characteristics make it look like a corporation to the CRA. Canada’s position, also described in the US Treasury’s technical explanation of the 2007 treaty protocol, is that a US LLC is a corporation for Canadian tax purposes, regardless of its US tax classification.

This means:

• US view: The LLC does not exist for tax purposes. The owner reports the LLC’s income directly.
• Canadian view: The LLC is a foreign corporation. The owner is a shareholder, not an operator. The income belongs to the corporation until it is distributed.

How does the double taxation happen?

The double taxation arises because the foreign tax credit system in Canada is designed to credit taxes paid by the same taxpayer on the same income. When the US taxes the individual and Canada treats the income as belonging to a corporation, the credits do not align.

Step 1: US taxation. The US taxes the LLC’s income on the owner’s Form 1040-NR (or 1040 for citizens). The owner pays US personal income tax at graduated rates. If the LLC earns $200,000, the US federal tax might be about $41,000.

Step 2: Canadian taxation. Canada treats the LLC as a controlled foreign affiliate (CFA) of the Canadian resident. If the LLC’s income is “foreign accrual property income” (FAPI, meaning passive income like investment income, rent from property not used in an active business, or certain service income), Canada taxes the owner on the FAPI in the year it is earned, regardless of whether it is distributed. If the income is active business income, it is taxed in Canada only when a dividend is paid (the exempt and taxable surplus pools only matter to a Canadian corporation that owns the affiliate).

Step 3: Credit mismatch. The Canadian owner tries to claim a foreign tax credit for the US tax paid. But the US tax was paid by the individual on income that Canada says belongs to the corporation. The problem: the US personal tax is not a tax paid by the LLC (the “corporation”), so it isn’t counted as tax the affiliate paid. And it may not work as a personal foreign tax credit either, because from Canada’s perspective the income is the corporation’s, included in the individual’s income only through the FAPI or dividend mechanism, often in a different year from the one the US taxed.

The result: the $200,000 is taxed in the US at personal rates (about $41,000 federal) and also taxed in Canada through the FAPI or dividend mechanism, with limited or no credit for the US tax already paid.

What are the solutions?

Several structures avoid or mitigate the double taxation:

Option 1: Elect corporate taxation for the LLC. The LLC can file Form 8832 (Entity Classification Election) and elect to be treated as a corporation for US tax purposes. This aligns the US and Canadian classifications: both countries treat the LLC as a corporation. The LLC files Form 1120 and pays US corporate tax at 21%. Distributions to the Canadian owner are dividends, subject to 15% treaty withholding for an individual owner (the 5% rate is only for a company that owns at least 10% of the voting stock). The Canadian owner includes the dividend in income and claims a foreign tax credit where available (the section 113 foreign affiliate deduction is only for a corporation resident in Canada, so an individual can’t use it).

The downside: the corporate rate (21%) plus the 15% withholding rate for an individual owner may be higher than the blended personal rate would have been. And the owner loses the ability to use LLC losses against personal income.

Option 2: Use a US C-Corporation instead of an LLC. If the business is being set up fresh, forming a C-Corporation instead of an LLC avoids the entity classification mismatch entirely. Both countries treat the C-Corp as a corporation. The tax treatment follows the same path as Option 1.

Option 3: Use a Canadian corporation to hold the LLC. The Canadian resident forms a Canadian corporation (Canco), and Canco owns the US LLC. The LLC remains disregarded for US purposes, so the LLC’s income flows to Canco’s Form 1120-F (Canco is the single member). Canada treats the LLC as a foreign affiliate of Canco. The surplus pool mechanics work more cleanly in a corporate-to-corporate chain, and the Canadian shareholder is one level removed. One catch: under Article IV(7)(a) of the treaty, US income earned through an LLC that Canada treats as a corporation isn’t treated as derived by its Canadian owner, so Canco generally can’t claim treaty benefits on the LLC’s income. One catch: under Article IV(7)(a) of the treaty, US income earned through an LLC that Canada treats as a corporation isn’t treated as derived by its Canadian owner, so Canco generally can’t claim treaty benefits on the LLC’s income.

Option 4: Elect to have the LLC taxed as an S-Corporation. This does not work for Canadian residents. S-Corporation shareholders must be US citizens or residents. A Canadian resident is not eligible to be an S-Corp shareholder, and the election would be invalid.

What if you already own a US LLC?

If a Canadian resident already owns a disregarded US LLC, the fix depends on whether the income is active business income or passive income, and whether the owner is also a US person.

US citizen living in Canada: The US citizen files a US return on worldwide income anyway, so the LLC income is taxed in the US either way. The same mismatch exists (Canada treats the LLC as a corporation), and whether the US tax can be credited in Canada still turns on timing and how Canada characterizes the income.

Canadian resident, not a US citizen: The mismatch is at its worst. The immediate step is to evaluate whether electing corporate classification (Form 8832) produces a better result. The election can be filed retroactively for up to 75 days before the filing date, or prospectively for a future effective date. A retroactive election beyond 75 days requires a reasonable cause statement and IRS approval.

The cost of restructuring (Form 8832 filing, possible tax on the deemed contribution of assets to the “new” corporation, state-level consequences) should be compared against the ongoing cost of double taxation.

What about multi-member US LLCs?

A multi-member US LLC defaults to a partnership for US tax purposes. Canada also treats it as a corporation (the same analysis: limited liability, separate legal existence). The mismatch is similar but more complex, because partnership allocations in the US do not match corporate distribution rules in Canada. Each member’s share of the LLC’s income is taxed in the US as a partnership distributive share, while Canada treats each member as a shareholder of a foreign corporation.

The same solutions apply: elect corporate classification, use a C-Corp, or interpose a Canadian holding company. The multi-member context adds complexity around the partnership agreement terms and who must sign the entity classification election (each member, or a member or manager authorized to make it).

What forms are involved?

• Form 8832 (Entity Classification Election): filed to change the LLC’s US tax classification from disregarded entity to corporation (or from partnership to corporation for multi-member LLCs).
• Form 1040-NR or Form 1120-F: the US return filed by the Canadian owner (1040-NR for individuals, 1120-F if a Canadian corporation owns the LLC).
• Form 1120: filed by the LLC if it elects corporate classification. Even without the election, a foreign-owned single-member LLC must file a pro forma Form 1120 with Form 5472 attached for any year it has reportable transactions with its owner, and contributions to and distributions from the LLC count. Even without the election, a foreign-owned single-member LLC must file a pro forma Form 1120 with Form 5472 attached for any year it has reportable transactions with its owner, and contributions to and distributions from the LLC count.
• T1134 (Information Return Relating to Controlled and Non-Controlled Foreign Affiliates): filed by the Canadian owner to report the foreign affiliate (the LLC treated as a corporation).
• T1 with Form T2209: the Canadian return, claiming foreign tax credits where available.
• T1135: shares of a foreign affiliate are not specified foreign property, so the LLC is reported on T1134, not T1135. The FBAR (FinCEN 114) covers accounts outside the United States held by a US person, so the LLC’s US bank account isn’t on it.

Related guides:

• Cross-border business structures compared, how LLCs, C-Corps, and Canadian holdcos compare for operating in both countries
• Transfer pricing for small cross-border businesses, how to set and document arm’s-length pricing when your Canadian company transacts with a related US entity

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