MER Drag in Canada: Why Low-Cost Index Funds Usually Win
Broad index funds and ETFs usually win for that reason, not because a ticker is magic. A low-cost fund that owns a wide market keeps the part of the return the market actually delivered. A fund that charges more has to beat that market by at least the fee, after its own trading, in the years you happen to own it. This page shows the arithmetic. It does not quote a live MER, name a winner, or promise a return. Product names, where they appear at all, are examples of a structure. Read the current ETF facts sheet before you buy.
Cost matters after you know what you are trying to own. A cheap equity fund is the wrong product if the money is for a house in two years, and a cheap global fund is the wrong comparison if you meant to own Canadian bonds. The mix, and which account holds it, is the DIY ETF asset-location guide. Fill registered room before you engineer a taxable sleeve — that sequence is the TFSA contribution guide. This article starts once the mandate is written down.
What the MER actually takes
You do not get a bill. The manager deducts the costs inside the fund, and the unit price you see is already net. That is why the drag hides. On a statement, two funds can look identical until you read the facts sheet.
In Canada the headline number on the ETF facts is the management-expense ratio. Beside it, many facts sheets also show a trading expense ratio: the fund's own cost of buying and selling its holdings. Neither number includes what you pay the broker to trade, or a foreign-exchange spread if the listing is in US dollars. Compare MER with MER. Then compare the costs the MER leaves out. Do not treat a figure you remember from a forum as the current one.
Markets do not pay a smooth 6 percent. The point of the table is the gap, not a forecast. A fund with a 0.20 percent MER keeps 5.80 percent. A fund with a 1.50 percent MER keeps 4.50 percent. After 25 years the first ends near $409,400. The second ends near $300,500. The difference is about $109,000 on the same contributions and the same market. The fee gap was 1.30 percentage points. The ending gap is larger than 1.30 percent of the account, because the fee is taken every year on a balance that would otherwise have grown.
| MER in the illustration | What a 6% gross return leaves | $100,000 after 25 years |
|---|---|---|
| 0.20% | 5.80% | About $409,400 |
| 1.50% | 4.50% | About $300,500 |
| 2.00% | 4.00% | About $266,600 |
In year one the same 1.30 point gap on $100,000 is $1,300. People compare $1,300 with a weekend and shrug. The 25-year figure is that shrug, repeated on a larger base. If your balance is half, halve the illustration. If it is double, double it. The shape does not change. None of these MERs is a quote of a fund you can buy today.
Trading costs the MER does not include
A fund can win the facts-sheet comparison and still be the expensive way to own the market, once it meets your brokerage account.
- Commissions and spreads. Many Canadian brokers now charge little or nothing to trade an ETF. Some lines still cost money: options, assisted orders, odd markets. The spread between the bid and the ask is a cost on the day you trade even when the commission is zero.
- Foreign exchange. A US-listed fund with a tiny published expense ratio can lose the advantage on the conversion from Canadian dollars. Price the order you will actually place. The brokerage comparison is about that structure, not a live rate card.
- Cash drag. Money that sits uninvested because you are shopping for a slightly cheaper ticker is a cost. So is a year of contributions left in cash because the platform was confusing.
- Taxes, if you sell to switch. In a non-registered account, realizing a gain to save a tenth of a percent can cost more than many years of the fee. Registered accounts do not have that problem. The order of operations is in rebalancing without junk tax events.
Two Canadian-listed funds that track the same index and differ by a few hundredths of a percent are a rounding exercise. A fund at 1.5 or 2 percent against a broad ETF at a fraction of a percent is the illustration above. Read both facts sheets in the year you buy, including the trading expense ratio, and do not import a third number from this page.
Why the broad, cheap fund usually wins
An active manager, or a clever rules-based fund with a high fee, has to clear the MER before you are ahead of simply owning the market. The manager also trades, and those trades are not free inside the fund. You, meanwhile, have to choose the manager who will clear that hurdle in the future, not the one whose past chart is on the advertisement.
Scorecards that compare active funds with their benchmarks, after fees, are published by index firms and they get updated. Read the current one if you want the score. This article will not freeze a percentage of "funds that failed" into a fact. The direction is the useful part, and it has been stable: the fee is a hurdle, broad funds that charge little clear it by not having it, and last year's winner is a poor shopping list.
Indexing is not a claim that markets are perfectly priced. It is a claim that you are unlikely to identify, in advance and after costs, the slice of managers who will more than earn their fee. A low-cost Canadian equity fund, a low-cost global fund, and a low-cost bond fund are tools for the mix you already wrote down. They are not a personality.
How to compare two similar funds
Compare funds that are trying to do the same job. A fee table that mixes a Canadian bond ETF, a covered-call fund, and a global equity ETF is not a comparison. It is three different bets.
| Check | What you are looking for | Where it lives |
|---|---|---|
| The benchmark | The index name, not the marketing label. "Canadian equity" can mean the broad market or a narrow slice of dividend payers. | ETF facts, "what does the fund invest in" |
| Currency hedge | A hedged fund and an unhedged fund of the same market are different products. The hedge has a cost that changes with interest rates. | Fund name and facts. The currency guide is the decision. |
| Holdings | Does the fund own the stocks, or does it own one other ETF? A wrapper can hide a second layer of fees and US withholding the RRSP cannot unwind. | Top holdings and the prospectus. The asset-location guide is why that matters. |
| MER and trading expense ratio | The current numbers. Not a blog, not a memory, not the series from a different share class. | This year's ETF facts |
| Tracking difference | How far the fund actually landed from its index over several years. One year is noise. | The issuer's annual report or the facts-sheet history |
| How you will buy it | Commission, spread, and foreign exchange on the order you repeat. | The broker's preview, the day you trade |
A Canadian-listed global ETF, plus a US equity ETF, plus an all-equity asset-allocation ETF, is often the same companies three times. You have not diversified. You have lost the Canada weight and the fee you thought you were minimizing. One structure. If you use building blocks, do not also hold the all-in-one. The all-in-one versus DIY guide is that choice.
When a higher MER is still the right product
A higher fee is not automatically a mistake. It is a mistake when you cannot say what it bought.
- An all-in-one that rebalances, if you will not rebalance the blocks yourself. The MER gap versus a do-it-yourself mix is often small. A small gap you will hold beats a tiny MER you abandon. Confirm both facts sheets. Do not assume the gap from a memory of 2024.
- Advice you actually use. Some mutual-fund series bundle advice into a higher MER. If a person is doing real planning, know which dollars are the advice and which dollars are the fund. Paying an advice-sized fee for a closet index you never discuss is the expensive version of "simple."
- A different bet. Covered-call funds, narrow sectors, and leveraged products are not slightly more expensive index funds. They are a different payoff. Judge the bet on its own. Do not let a yield figure stand in for an MER comparison.
A check you can finish in an hour
- Write the benchmark: which market, hedged or not, stocks or bonds.
- Open the ETF facts for the fund you hold and for one alternative that tracks that same benchmark.
- Read the MER, the trading expense ratio, and whether the fund owns stocks or another fund.
- Preview the purchase at your broker, including foreign exchange if the listing is in US dollars.
- Switch only if the mandate matches and the gap is real. In a taxable account, estimate the capital gain before you sell. A registered account is the clean place to fix a fee.
Key takeaways
- The MER compounds on a growing balance. A one-year dollar figure understates it. The illustration above is the shape, not a forecast.
- Verify the current MER and trading expense ratio on the facts sheet. Nothing on this page is a live quote.
- Trading costs and foreign exchange sit outside the MER. A cheap US-listed fund can still be the expensive way in.
- Compare funds with the same benchmark, the same hedge, and the same holding structure.
- A small gap you will actually hold beats a perfect fee on a portfolio you will not maintain. That is the all-in-one question.
- Do not realize a taxable gain to save a trivial MER. Do the switch inside a TFSA or RRSP when you can.
The fee is the part you can know in advance.
Which account holds the fund still decides the tax. The 2026 tax guide is the other half of the same plan.
Get the 2026 Tax Guide — $49 CAD
