US Tax for Canadian Founders Running US LLCs
The CRA treats a single-member US LLC as a foreign corporation while the IRS treats it as disregarded — in worst-case mismatches the combined effective rate can approach 60–70% before relief, though active-business profits sit outside FAPI and matched foreign-tax credits or a check-the-box election usually bring it back toward the ~50% range. The Canada-US treaty (1980) Article VII governs business profits.
Approval-window and timing figures are based on founder reports tracked by Global Solo; regulatory figures follow the cited agency's published rules.
US tax for non-US-resident founders running US LLCs is shaped by three converging questions: does the US LLC have Effectively Connected Income (ECI), does the founder owe US tax personally on LLC profits, and how does the founder's home-country tax authority treat the LLC structure. For a non-US-person owner the US answer is usually narrow — no US income tax on foreign-earned business profits, with Form 5472 as the only filing; the expat-tax services below fit founders who are themselves US persons (citizens or green-card holders) living abroad. Home-country treatment requires a local CA / CPA familiar with the cross-border layer.
US Tax + Treaty options for Canadian founders
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US expat tax preparation service specializing in FBAR, FATCA, and foreign-earned income exclusion filings.
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Canada cross-border compliance layer
Canada is the cohort where a US LLC is most often the wrong vehicle, and the reason is tax characterisation rather than US tax itself. On the US side the usual rule holds: an LLC operated from Canada with no US trade or business has no effectively connected income and no US federal income tax on business profits, with Form 5472 plus pro-forma Form 1120 due (USD 25,000 penalty, IRC Section 6038A). The problem is the hybrid mismatch — the CRA classifies a single-member US LLC as a foreign corporation (its two-step entity approach, ITTN-38), while the IRS treats it as disregarded.
That mismatch can strand relief. The US taxes the owner on LLC income as it is earned; Canada, treating the LLC as a corporation, taxes the owner only on distributions as dividends — so US tax paid in one year may not match the Canadian dividend tax in another, and the foreign tax credit (Folio S5-F2-C1) can be denied or limited. In worst-case mismatches the combined effective rate can approach 60–70%, but this is an avoidable planning-failure outcome: matching the distribution to the year of US tax, an ITA 20(12) deduction, or a check-the-box election aligning both systems normally brings the rate back toward the ~50% top-marginal range. Active business profits are generally outside the Foreign Accrual Property Income (FAPI) rules of ITA sections 91–95 — those attribute passive income, not an active operating business — so a genuine services LLC is usually not accrual-taxed on its operating profit. Compliance is heavy regardless: Form T1134 is due 10 months after year-end, and Form T1135 with the personal return (April 30) once specified foreign property exceeds CAD 100,000. The Canada-US treaty (1980) Article VII covers business profits and Article IV(6) the look-through for fiscally transparent entities.
**Sources cited above:** IRC Section 6038A (Form 5472); CRA two-step entity classification (ITTN-38, LLC = corporation); CRA Income Tax Folio S5-F2-C1 (foreign tax credit); ITA sections 91–95 (FAPI, active-business exclusion) and section 20(12); Forms T1134 (10-month deadline) and T1135 (CAD 100,000 threshold); Canada-US Income Tax Convention (1980) Articles VII and IV(6). Last verified 2026-06-01.
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