Anonymised, illustrative composite. The fix was obvious once the rule was read: convert some of the shareholder loan to share capital. What was not obvious was that doing it in month eight only fixed four months, because the test averages every month of the year.
At a glance
A European industrial group bought an Ontario precision-machining business, its first Canadian acquisition, through a newly incorporated Canadian acquisition company. The funding mix was chosen for reasons unrelated to Canadian tax: shareholder debt is easier to repatriate than share capital and easier to write down. $6,000,000 went in as share capital — $5,280,000 subscribed by the parent for 88%, $720,000 by four Canadian managers for 12% — and $19,000,000 as an interest-bearing loan from the parent, with $3,000,000 of local bank debt on top.
The group's Canadian advisers flagged the thin-capitalisation rule and the response was right in principle: recapitalise, moving part of the loan into share capital. Two things then went wrong, and both were about the units the rule measures.
First, the equity side of the ratio was smaller than assumed. The $6,000,000 was read as the equity figure. It is not: only paid-up capital on shares owned by a specified non-resident shareholder counts, so the Canadian managers' $720,000 was outside the calculation entirely and the relevant figure was $5,280,000.
Second, the timing. Everyone treated the conversion as a year-end fix. The measure is not a year-end balance but an average of monthly amounts across the whole year, so eight months at $19,000,000 were already in the average before the conversion happened.
Left alone. Average outstanding debt to the parent, $19,000,000. Equity amount, $5,280,000. One and a half times that is $7,920,000, so the excess is $11,080,000, which is 58.32% of $19,000,000. Interest at 6.5% on $19,000,000 is $1,235,000, of which 58.32% — $720,200 — would be denied.
Converted $7,000,000 effective the last day of month eight. The debt average becomes eight months at $19,000,000 and four at $12,000,000, or $16,666,667. Paid-up capital held by the parent averages eight months at $5,280,000 and four at $12,280,000, or $7,613,333. One and a half times that is $11,420,000; the excess is $5,246,667, or 31.48%. Interest for the year is $1,083,333, of which 31.48% — $341,033 — is denied.
The conversion restored $379,167 of deduction and left $341,033 denied. Done before the first month of the year, the same $7,000,000 would have satisfied the ratio comfortably. The cost of the delay was arithmetic, not a change in the plan.
ITA s.18(4) carries the marginal note Limitation on deduction of interest. It applies “Notwithstanding any other provision of this Act (other than subsection (8))”, in computing the income of a corporation or a trust from a business or property, and denies “that proportion of any amount that would, in the absence of this subsection and section 18.2, be deductible in computing that income in respect of interest paid or payable by it on outstanding debts to specified non-residents”.
The unit is a monthly-high average, not a balance. The numerator is the amount by which “the average of all amounts each of which is, in respect of a calendar month that ends in the year, the greatest total amount at any time in the month of the outstanding debts to specified non-residents” exceeds “1.5 times the equity amount of the corporation or trust for the year”; the denominator is that same average. Repaying the loan on the last day of the year does nothing, because each month has already contributed its highest figure. A structure fixed mid-year is fixed for the months after the fix and no earlier ones.
The equity amount, defined in s.18(5), is the second place this goes wrong. For a corporation resident in Canada it is the total of retained earnings at the beginning of the year, the monthly average of contributed surplus “to the extent that it was contributed by a specified non-resident shareholder”, and the monthly average of paid-up capital “excluding the paid-up capital in respect of shares of any class of the capital stock of the corporation owned by a person other than a specified non-resident shareholder of the corporation”. Equity subscribed by Canadian management, or by an arm's-length Canadian co-investor, does not raise the denominator at all.
Two definitional points widen the rule beyond ‘the parent’. A specified non-resident shareholder is a specified shareholder who is non-resident, and a specified shareholder is a person who, alone or with non-arm's-length persons, owns shares carrying 25% or more of the votes or having 25% or more of the fair market value. And outstanding debts to specified non-residents reaches beyond that holder: it includes amounts payable to “a non-resident person who was not dealing at arm's length with a specified shareholder of the corporation”. A loan from a foreign sister company that owns no shares at all is caught.
Finally, note how this sits with the excessive interest rules. Section 18(4) computes the amount that would be deductible “in the absence of this subsection and section 18.2”, so the two are not alternatives and clearing one is no answer to the other. The way they interact in computing a final figure is a further question, and it is not resolved in this file.
$7,000,000 of the loan was capitalised by a share subscription by the parent, effective on the last day of month eight so that both figures changed cleanly at a month boundary. The alignment mattered: the debt test looks at the greatest amount at any time in a month and the paid-up capital test at the amount at the beginning of a month, so a mid-month conversion gives the group the worse half of both.
Had the $7,000,000 gone in as share capital at closing, it would have been outside s.18(4) entirely and would have had a double effect on the ratio — shrinking the numerator by $7,000,000 of debt and increasing the denominator by $7,000,000 of paid-up capital held by a specified non-resident shareholder. On these figures the group would have satisfied the test with room.
The trade-off is why the loan existed. Equity earns no deductible interest and leaves the group returning capital rather than repaying principal. That choice, not the arithmetic, is the substance of a cross-border funding decision — see Treadstone Law on shareholder loan versus equity.
The tell was a funding schedule expressed as totals. ‘$6 million equity, $19 million shareholder loan’ is the wrong shape twice over: it does not say who subscribed the equity, and it does not say when. The schedule that answers the question runs month by month — the highest intercompany debt balance in each month, and the paid-up capital held by non-resident specified shareholders at its start. It can be built at closing, and once it exists the fix is obvious and free.
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