A fund yields 12%. Another yields 4%. Which one pays you more?
It sounds like arithmetic. It isn't — because a distribution and income are not the same thing. Part of that 12% might be genuine earnings: dividends from underlying stocks, option premium, interest. And part of it might be something stranger: your own invested capital, handed back to you in monthly installments, dressed up as yield.
That second category has a name — return of capital (ROC) — and if you own Canadian covered-call or enhanced-income ETFs, you almost certainly receive some. That's not automatically a problem. Sometimes ROC is perfectly benign, even tax-smart. Sometimes it's a fund slowly liquidating itself into your chequing account while the headline yield stays impressive.
The entire trick is knowing which one you're holding. Here's how it actually works.
What a distribution is actually made of
When a Canadian ETF pays you a monthly distribution, that cash is classified into categories for tax purposes: eligible dividends, interest income, capital gains, foreign income — and return of capital. You see the full breakdown once a year on your T3 slip (ROC lands in Box 42), long after the cash arrived.
Here's the part most investors miss: the monthly payment tells you nothing about its composition. A $0.15 distribution looks identical in your account whether it's fifteen cents of real earnings or fifteen cents of your own capital coming back. The label arrives at tax time. The economics are happening all year.
The benign kind: ROC as a tax label
Start with the version that isn't a problem, because it's common and widely misunderstood.
Covered-call ETFs earn a large share of their income from selling options. Under Canadian tax rules, much of that option premium can be characterized as return of capital rather than income. Global X — one of Canada's largest covered-call providers — publishes plainly that when written options expire worthless, the resulting distributions are tax-efficient precisely because they're characterized as ROC.
In this case, "return of capital" is essentially a tax label on real earnings. The fund genuinely made the money; the classification just changes when you pay tax on it. ROC isn't taxed in the year you receive it — instead it reduces your adjusted cost base (ACB), which means a larger capital gain when you eventually sell. Tax deferred, not tax avoided. For many investors, especially in lower brackets today than they expect at sale, that's a feature.
The tell: a fund paying benign ROC holds its value. The distribution is covered by what the fund actually earns, so the NAV isn't grinding downward to fund it.
The destructive kind: paying you with you
Now the version that matters.
A fund earns, say, 7% in a given year — dividends plus option premium plus a bit of price appreciation. But it has promised the market a 10% distribution, because 10% is what attracts inflows. Where does the extra 3% come from?
From the fund itself. It pays out more than it earned, and the difference is literally your capital, returned to you. The NAV drifts lower. Next year, that lower NAV generates less income — the same yield percentage now requires an even larger share of capital to sustain. Rinse, repeat. The fund isn't lying to you; every dollar is real and spendable. It's just that some of those dollars were already yours, and each one that comes back leaves less behind to earn anything at all.
The cruel part is how good it looks from the outside. The yield stays high — arithmetically, a falling price raises the displayed yield. An investor screening for "highest yield" is often sorting, unknowingly, for exactly this pattern.
And there's a tax sting waiting at the end for non-registered accounts: all that ROC has been reducing your ACB the whole time. If your ACB grinds all the way to zero, further ROC becomes immediately taxable as capital gains — and when you finally sell, the gap between your sale price and that depleted cost base comes due. The "tax-efficient" income deferred the bill; it didn't cancel it.
The test: stop reading the label, watch the total return
Here's the practical problem: you cannot distinguish these two cases from the distribution itself, the yield figure, or even the T3 slip. Benign ROC and destructive ROC produce the same box on the same form.
What actually separates them is one question: is the fund's total return — price change plus every dollar it distributed — keeping pace with its own sector?
A fund whose total return tracks a fair benchmark is earning its distribution, whatever the tax label says. A fund whose total return persistently lags its sector while paying a high distribution is, in economic terms, funding some of that payout from capital — and no favourable tax characterization changes that math.
One honest caveat: this test needs care in a strong market. Covered-call strategies structurally give up some upside in exchange for premium income — BMO's own fund literature says outright that these ETFs will tend to underperform in sharp market advances. A fund trailing a red-hot benchmark by a few points while its own total return is solidly positive is usually the strategy working as designed, not erosion. The signal isn't "lagged a great year" — it's persistent, meaningful underperformance, especially when the fund's own total return can't cover what it pays out.
How we handle this at DivSight
This test is, verbatim, the highest-weighted factor in our scoring engine. For every fund we cover, we measure total return — actual price change plus actual cash distributions paid — against a researched category benchmark over the same window, and flag the gap. Not the ROC percentage on last year's tax breakdown, which describes labels; the total-return gap, which describes economics.
When a fund's yield is genuinely covered, we say so. When a fund scores well overall but total return trails enough to raise the capital-return question, that concern appears — with the specific numbers — directly on its page, right next to the score. And when a fund merely trailed an exceptional benchmark year while its own return stayed healthy, we say that too, because "underperformed a hot market" and "handing your capital back" are very different findings that deserve different words.
A high yield is a claim. Total return is the evidence. If you hold — or are eyeing — a double-digit yielder, look up its page and see whether the evidence backs the claim: every fund we cover is a search away, free.
This is educational content, not tax or financial advice — ROC tax treatment in particular varies by account type and situation; see our methodology and disclaimer, and consult a professional for your own circumstances.