Assume that throughout the year, Canco in the above example has $1,000 in paid-up capital and no other equity, and owes $1,000 to US-Co (its parent) bearing interest at 7% (paid as to $35 at the end of each of Q2 and Q4), and owes $1,000 to UK-Co (a sister) bearing interest at 5% ($25 at the end of Q2 and Q4).
$500 (or 25%) of this debt exceeds the thin capitalization limit of 1.5-to-1. Accordingly, 25% of each of the above interest payments would be deemed to be a dividend absent a designation under s. 214(16)(b). If Canco instead designates $17.50 of its fourth quarter US-Co interest payment to be a dividend (i.e., 25% of total US-Co interest of $70), and $12.50 of its fourth quarter UK-Co interest payment to be a dividend (25% of $50), the imposition of Part XIII tax will be deferred to the end of Q4.