“ECI” and its Trap for Unwary Canadian Investors in Partnerships and LLCs
A Canadian which holds a partnership interest in a U.S. or non-U.S. partnership that has “effectively connected income” (“ECI”) is subject to U.S. tax withholding with respect to the Canadian partner’s allocable share of the partnership’s ECI. That withholding tax must be remitted by the partnership to the IRS irrespective of whether any distributions are made by the partnership in that tax year and irrespective of the Canadian partner’s ultimate U.S. federal income tax liability for that tax year. For this purpose, a “partnership” includes any entity classified as a partnership for U.S. tax purposes, including a limited liability company or “LLC” classified as a partnership. ECI generally includes all income from U.S....