Incorporating a Business Cross-Border: Canada vs US

By Yarik Yarosh, CPA ·August 30, 2026 ·10 min read

Written by Yarik Yarosh, CPA (US & Canada) August 30, 2026 · FL CPA license AC61704 · CPA Ontario

Where you incorporate determines which tax system sits on top of your business, and picking the wrong jurisdiction creates costs that are difficult to unwind. A Canadian resident who forms a US LLC is taxed on the LLC’s income in Canada at personal rates, gets no corporate deferral, and may owe US tax too. A US citizen who forms a Canadian corporation gets the small business deduction on the Canadian side but owes US GILTI tax on the corporate income that was not distributed. The structure that works in one country can produce the worst outcome in the other. The right choice depends on where you live, where you work, where your customers are, and which country gets the primary taxing right.

✓Key takeaway

For a Canadian resident with no US ties, a Canadian corporation (typically a CCPC) is the default. The small business deduction provides a combined federal-provincial rate of roughly 12% to 15% on the first $500,000 of active business income. A US LLC does not work for a Canadian resident because Canada treats it as a corporation for tax purposes but the US treats it as a pass-through, creating a mismatch that produces double taxation, not deferral. For a US citizen living in Canada, a Canadian corporation works for the Canadian side but triggers CFC reporting (Form 5471) and GILTI on the US side. For a US resident with Canadian customers, a US C-corp or LLC works domestically, but doing business in Canada may create a Canadian PE and a need to register a Canadian branch or subsidiary. The entity choice is a tax planning decision, not a registration decision.

What are the entity options?

Four structures come up in almost every cross-border conversation:

Entity	Where formed	Tax treatment in Canada	Tax treatment in the US
Canadian corporation (Inc., Ltd.)	Canada (federal or provincial)	Taxed as a corporation. CCPC gets SBD.	Taxed as a corporation (per se entity). No check-the-box. CFC rules apply if US shareholders hold >50%.
US LLC (single-member or multi-member)	US state (Delaware, Wyoming, etc.)	Canada treats it as a corporation (no flow-through).	US treats it as a disregarded entity (single-member) or partnership (multi-member) by default. Can elect C-corp status.
US C-corporation	US state	Canada treats it as a corporation.	Taxed as a corporation. 21% federal rate.
US S-corporation	US state	Canada does not recognize S-corp election; treats it as a corporation.	Flow-through for US shareholders. Not available to nonresident alien shareholders.

The critical insight: the two countries do not agree on how to classify a US LLC. The US sees it as a pass-through. Canada sees it as a corporation. This mismatch is the source of the “LLC tax trap” that catches Canadian residents who form US LLCs on the advice of US-focused accountants or online incorporation services.

Why does a US LLC not work for Canadian residents?

A Canadian resident who forms a US LLC expects pass-through treatment: the LLC’s income flows to their personal return, they pay personal tax, and there is no corporate-level tax. That is how it works in the US. But Canada does not recognize the LLC as a pass-through entity. The CRA treats the LLC as a foreign corporation, which means:

The LLC’s income is not included on the Canadian T1 until it is distributed as a dividend
When it is distributed, it is taxed as foreign dividend income (no eligible dividend gross-up and credit, because it is a foreign corporation)
The US tax paid by the LLC is not creditable on the Canadian return, because Canada treats the LLC (not the individual) as the taxpayer on that income
The individual cannot claim the US tax paid by the LLC as an FTC on their Canadian return, creating double taxation

The result: the LLC income is taxed at US personal rates (federal plus state), and then taxed again in Canada as a foreign dividend when distributed, with no credit for the US tax already paid at the entity level. The effective rate can exceed 60%.

The fix is either a check-the-box election to treat the LLC as a C-corporation for US purposes (which gives Canada a corporation to match its classification, but loses the pass-through benefit) or winding up the LLC and operating through a Canadian corporation instead.

What happens when a US citizen incorporates in Canada?

A US citizen living in Canada who incorporates a Canadian corporation gets the Canadian corporate benefits (SBD, deferral, integration), but the US treats the corporation as a CFC. This triggers:

Form 5471. Filed annually for each CFC. Four categories of filers with different schedules. The $10,000 penalty per missed filing per year is automatic.
GILTI (Global Intangible Low-Taxed Income). Under IRC 951A, the US shareholder includes the CFC’s tested income (roughly, active business income minus 10% of tangible depreciable assets) on their personal US return, regardless of whether the income was distributed. For individuals, the IRC 250 deduction is not available, so the full GILTI amount is taxed at ordinary rates.
Subpart F. Passive investment income (interest, dividends, rents, royalties) earned inside the Canadian corporation is included on the US shareholder’s return under IRC 951(a), regardless of distribution.

The practical effect: a US citizen cannot defer Canadian corporate income from US tax the way a pure Canadian owner can. The GILTI inclusion means the US taxes the income currently, even if it stays inside the corporation. The FTC may offset some of the US tax (Canadian corporate tax at 12% to 15% generates a credit, but the deemed-paid FTC under IRC 960 is limited to 80% of the foreign taxes, and the US marginal rate on the inclusion can exceed the credit).

Hypothetical example

A hypothetical with made-up numbers. A US citizen living in Ontario incorporates a Canadian consulting corporation. The corporation earns $400,000 of active business income. The Canadian combined federal-Ontario tax rate for a CCPC on the first $500,000 is approximately 12.2%.

Canadian corporate tax: $400,000 times 12.2% = $48,800.

US GILTI inclusion: the full $400,000 is tested income (the corporation has no significant tangible assets, so the 10% QBAI reduction is minimal). The US citizen includes $400,000 on their US return as ordinary income.

US tax at 32% marginal rate: $128,000.

Deemed-paid FTC: 80% of $48,800 = $39,040.

Net US tax after credit: $128,000 minus $39,040 = $88,960.

Total tax (Canadian corporate plus net US): $48,800 plus $88,960 = $137,760, an effective rate of 34.4% on income that has not been distributed. If the income is later distributed as a dividend, Canadian Part IV tax applies, and the US may have already taxed the distribution under PTEP rules (previously taxed earnings and profits), which prevents double taxation on the distribution but not on the initial inclusion.

Compare to operating as a sole proprietor: the same $400,000 would be taxed at personal rates in both countries with the FTC coordinating. The combined rate might be 45% to 50%, but there is no double layer, and the GILTI mismatch is eliminated.

Illustrative numbers only, not a real client and not advice for your facts.

When does a US corporation make sense?

A US corporation (C-corp) makes sense when:

The business operates primarily in the US and the owner is a US resident
The business has US investors (VCs, institutional) who expect a Delaware C-corp
The business plans to go public in the US
The owner is a Canadian resident but wants to operate a US-based business with a US PE, and the 21% US corporate rate is acceptable

For a Canadian resident, a US C-corp is taxed at 21% federally (plus state tax) on US-source income. The corporation is a foreign corporation from Canada’s perspective, and the owner does not include the corporate income on their Canadian T1 until it is distributed. Distributions are taxed as foreign dividends. The US corporate tax is not directly creditable on the Canadian return (it is a corporate-level tax, not a personal-level tax), but the Canadian foreign accrual property income (FAPI) rules may apply to passive income inside the US C-corp.

What about an S-corporation?

An S-corporation is a US flow-through entity. It avoids double taxation in the US because income passes through to shareholders. However:

S-corp shareholders must be US citizens or residents. A nonresident alien cannot be an S-corp shareholder. If a Canadian resident (who is not a US citizen or green card holder) becomes a shareholder, the S-corp election is terminated.
Canada does not recognize the S-corp election. The CRA treats the S-corp as a regular corporation, so the same mismatch that applies to LLCs can apply here, though the mechanics differ because the US treats the income as pass-through (personal rates, not corporate rates).

For a US citizen living in Canada, an S-corp can work if structured carefully: the US flow-through avoids GILTI (because the income is already included on the personal return), and the Canadian FTC coordinates the two countries’ taxes. But Canada’s classification as a corporation means the Canadian return must be filed correctly to avoid the mismatch.

What records and filings are required?

Cross-border corporate structures create filing obligations in both countries:

Canadian corporation, US citizen owner: T2 corporate return (Canada), Form 5471 (US), Form 8992 for GILTI (US), personal T1 (Canada), personal 1040 (US)
US LLC, Canadian resident owner: US 1040 or 1040-NR (US, depending on status), T1 (Canada), T1134 if a foreign affiliate (Canada), potentially Form T106 for related-party transactions
US C-corp, Canadian resident owner: US 1120 corporate return (US), T1 (Canada), T1134 (Canada), T106 (Canada)

The penalties for missed filings are severe in both countries. The US $10,000-per-year-per-form penalty on Form 5471 alone justifies getting the structure right before incorporating, not after.

What should I do next?

If you are considering incorporating a business and you have ties to both Canada and the US (citizenship, residency, customers, or operations), the entity choice needs to be evaluated against both countries’ tax systems before you file the incorporation documents. The cost of restructuring after incorporation is higher than the cost of planning it correctly the first time.

Why a US LLC is a tax trap for Canadian residents, the classification mismatch in detail
CCPC overview, the Canadian corporate tax benefits
CFC overview, the US reporting and GILTI layer
Check-the-box election, the US election that changes an LLC’s classification
Form 5471 filing, the annual reporting obligation for US shareholders of foreign corporations
Section 85 rollover, the tax-deferred transfer of property into a Canadian corporation
Section 199A QBI deduction cross-border, the 20% deduction for US pass-through income and how it interacts with foreign income

Choosing where to incorporate?

The Cross-Border Assessment is a fixed $250. You get a written, CPA-reviewed analysis of the entity options for your situation, the tax cost in both countries, and the filing obligations that follow each choice.

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Cite this page

Yarik Yarosh, CPA. "Incorporating a Business Cross-Border: Canada vs US." Blue Cloud CPA, August 30, 2026. https://bluecloudcpa.com/guides/incorporating-business-cross-border-canada-us

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