Canadian businesses operating in the U.S.: filings and structure

A Canadian company selling into, operating in, or hiring in the United States picks up U.S. filing obligations quickly — often before management realizes it. And every U.S. entity owned by Canadian residents creates reporting on both sides of the border at once.

U.S. entity filings we prepare

• U.S. LLC — classified by default as a disregarded entity (single member) or partnership (multiple members), each with different filing paths; election options exist and must be made deliberately.
• S corporation — note the trap: S corps cannot have nonresident alien shareholders, so Canadian residents generally cannot hold them directly. Existing S corps with moved shareholders need immediate attention.
• Partnership (Form 1065) — including K-1s for each partner and the U.S. withholding mechanics for foreign partners.
• C corporation (Form 1120) — including state filings, which in the U.S. are a separate universe from Canadian provincial rules.
• State-level obligations — income/franchise taxes, sales tax registration and collection where nexus exists.

The parallel Canadian reporting

• T1134 — a Canadian resident (individual or corporation) holding a U.S. corporation or LLC must usually report the foreign affiliate.
• T2 corporate return — the Canadian parent continues to file, with upstream dividend and management-fee interactions between the two entities.
• Form 5471/8865 on the U.S. side — when U.S. persons own Canadian entities, the same asset appears again in the U.S. information system.

Permanent establishment risk

If a Canadian company's activities in the U.S. go beyond treaty-protected categories — dependent agents concluding contracts, construction projects, warehousing patterns — Canada's company can become taxable in the U.S. as a permanent establishment. Where work is performed, by whom, and for how long all matter. Structure and contracts should be reviewed before the activity starts, not after a state or IRS inquiry.

Structuring choices worth making early

Direct branch vs. U.S. subsidiary, LLC vs. corporation, debt vs. equity funding, management-fee and royalty flows, and branch-profits or repatriation planning all interact with both countries' rates and the treaty. Changing the structure later is far more expensive than choosing well initially.

We prepare the U.S. entity filings, keep the Canadian T1134/T2 side consistent, and advise on structure before expansion — one team for both systems.