Principal Issues: Should a US LLC, which has a US Corporation as its sole member and which has not checked the box to be treated as a corporation for US tax purposes, compute its earnings in accordance with subparagraph (a)(i) of the definition of "earnings" in subsection 5907(1) of the Regulations (i.e. pursuant to the income tax laws of the U.S.) or in accordance with subparagraph (a)(iii) of the definition of "earnings" in subsection 5907(1) of the Regulations (i.e. pursuant to the income tax laws of Canada)?
Position: Subparagraph (a)(i) of the definition of "earnings" in subsection 5907(1)of the Regulations applies, so that the US LLC must compute its earnings pursuant to the income tax laws of the US.
Reasons: A single member US LLC which has not checked the box to be treated as a corporation for US tax purposes is disregarded for US tax purposes. As a consequence, the income of the US LLC will be included in the computation of the income of its member (i.e. the US Corporation) for US tax purposes. This obligation to compute the income of the US LLC is sufficient to bring the US LLC within the provisions of subparagraph (a)(i) of the definition of "earnings" in subsection 5907(1) of the Regulations.