MER calculator: what investment fees cost you over time

How much do investment fees cost over time?

Investment fees cost far more over time than the yearly charge suggests, because a percentage fee is taken from a growing balance and every dollar removed also stops compounding. This MER calculator puts two or three fee levels side by side on the same money, so the difference shows up in dollars rather than as a small percentage.

The calculator reports four things for each fee level: the ending balance, the fees charged directly, the growth those fees would have earned, and the total cost compared with a no-fee benchmark. It then shows how the gap between the highest and lowest fee grows from 5 to 40 years, what every fee from zero to three points would cost on your plan, and a year-by-year schedule you can download as a CSV.

If you are still working out what an MER is, start with the plain-language explainer on what MER means and where to find it, then come back with the numbers from your own fund documents.

How do you use this MER calculator?

1. Enter your starting amount. Use the current balance you want to test, for example one RRSP or TFSA, or the whole portfolio.
2. Add a regular contribution and how often you make it. Monthly, quarterly or once a year. Enter 0 to test a lump sum on its own.
3. Set a return before fees. This is the growth of the investments themselves, before any fee comes off. It is an assumption, so try a few.
4. Choose the years. How long the money stays invested.
5. Enter fee level A and fee level B. Use the all-in annual fee: the MER from the Fund Facts or ETF Facts document, plus any advisory or robo-advisor fee charged on the account.
6. Pick a third option. Choose XEQT or VFV to compare against a low-cost ETF at its issuer-published MER, enter your own third fee, or compare two levels only.
7. Open “Contribution timing” if it matters. Money added at the start of each period earns, and pays fees, for that period too.

The results update as you type. The summary sentence gives the answer first; the tables and the year-by-year schedule carry the detail, and the CSV button downloads the schedule for a spreadsheet.

What does a worked example look like?

Take a starting balance of $50,000, contributions of $500 a month, a return before fees of 6% a year and 25 years invested. Fee level A is 2%, the kind of all-in cost a mutual fund with an embedded trailing commission can carry. Fee level B is 0.7%, roughly a robo-advisor’s fee plus its ETF MERs. The third option is XEQT at its issuer-published MER of 0.19%.

Over the 25 years, $200,000 goes in. Here is where each fee level ends:

The headline number is the gap between fee level A and XEQT: $152,072 after 25 years. That equals about 25.3 years of this investor’s contributions. In year one, the higher fee takes about $1,079 from the account versus $103; by year 25 it takes about $7,436 a year, because it is a percentage of a larger balance.

Time does most of the damage. On the same plan, the gap between A and XEQT is $21,987 after 10 years, $152,072 after 25 and $585,160 after 40.

Why is the cost bigger than the fees you are charged?

The cost is bigger because a fee removes money that would otherwise have kept growing. In the example, fee level A charges $94,940 over 25 years, but the account ends $171,745 below the no-fee benchmark. The extra $76,805 is the growth those fees would have earned had they stayed invested.

This is why the calculator shows both numbers. “Fees charged” is what a total cost report would add up. “Total cost versus no fees” is what the fee actually does to your ending balance. When comparing two products, the second number is the one that decides how much money you end up with.

Does the return change how much a fee takes?

For a lump sum, no: the share of the ending balance lost to a fee depends only on the fee and the number of years. A return of any size multiplies the fee and no-fee balances by the same growth, so it cancels out of the ratio. With regular contributions the share moves a little, because the return changes how much of the ending balance comes from older money, which has been charged for longer.

Here is the share of a lump sum’s ending balance lost to a steady annual fee, deducted monthly. It holds at any return:

To see it in dollars, take a lump sum of $100,000 held for 25 years at a 2% fee. At a 4% return the fee costs $104,960; at an 8% return it costs $269,640. Both are 39.4% of the no-fee balance. What the return does change is the share of your growth the fee takes: a fee charged on the whole balance eats a bigger slice of a small return than of a large one, which is why the calculator’s last column rises when you lower the return.

How does the maths work?

The calculator steps through every month of your plan. In plain English, each month:

1. If contributions go in at the start of the period, the contribution is added.
2. The balance grows by one month’s share of the annual return before fees (the monthly rate that compounds to the annual rate over twelve months).
3. One-twelfth of the annual fee is taken off the balance and added to “fees charged”.
4. If contributions go in at the end of the period, the contribution is added.

The same steps run once with no fee (the benchmark) and once for each fee level. The total cost of a fee is the benchmark balance minus the balance with that fee. Without contributions, one year multiplies the balance by (1 + return) and then by (1 − fee ÷ 12) twelve times, which is why the lump-sum shares above depend only on the fee and the years.

Deducting the fee monthly is close to how an MER works: a fund accrues its expenses daily and takes them out of its unit price, so you never see a bill. The calculator is checked against closed-form formulas for lump sums and regular contributions, and against Edward Jones Canada’s published illustration that a 2% MER costs $20 a year for every $1,000 invested.

Which fees does an MER include, and which are extra?

An MER includes the fund’s management fee, its operating expenses and the sales tax on them. Several other costs sit outside it. This table shows where each one comes from, so you can decide what to add into each fee level:

For fee level A or B, add every ongoing percentage fee you pay on the same money: the MER plus any advisory or robo-advisor fee. Do not add a trailing commission separately, because it is already in the MER. One-off and per-trade costs belong in a different tool, such as this Canadian brokerage fee calculator for trading commissions.

How do mutual fund, robo-advisor and ETF fees compare?

Mutual fund, robo-advisor and ETF fees differ mainly in how many layers you pay. The Ontario Securities Commission says mutual fund MERs range from less than 1% to more than 3%, and many of those funds include a trailing commission for the dealer. A robo-advisor adds its own fee on top of low-cost ETFs: RBC InvestEase, for example, lists 0.50% + sales tax plus a weighted ETF MER of 0.12%–0.25%. Buying an ETF yourself leaves only the MER, such as XEQT at 0.19% or VFV at 0.08%, plus any trading costs.

A lower fee is not the only thing that matters. A robo-advisor or advisor also rebalances, handles contributions and may give planning help, and some people value that. The calculator’s job is to put a dollar figure on the difference so the trade-off is visible. The two ETFs are not interchangeable either: see how VFV and XEQT differ on fees, holdings and returns, and compare platforms in the guide to robo-advisors in Canada and their fees.

Where do you find the fees you actually pay?

The Fund Facts document (for mutual funds) or ETF Facts document lists the MER and the trading expense ratio, and is available from the fund company’s website or your dealer. Account-level fees, such as advisory or administration fees, appear on your statements. Once a year, your dealer sends an annual report on charges and other compensation showing what it was paid, including trailing commissions.

That annual report is getting more detailed. Under new total cost reporting rules, it will also show fund expenses in dollars, with the first enhanced reports arriving early 2027 (covering costs up to December 31, 2026). Until then, the MER in the Fund Facts is the figure to use.

What are common mistakes when comparing investment fees?

• Comparing management fees instead of MERs. The MER is usually higher than the management fee because it adds operating costs and taxes. Use the MER for every fund.
• Forgetting the platform fee. A robo-advisor or fee-based account charges on top of the MER. Add both into one fee level.
• Counting a trailing commission twice. It is paid out of the MER, so it is already included.
• Looking only at the first year. A fee that costs a few hundred dollars this year can cost tens of thousands over a working life, because the charge grows with the balance and the lost money stops compounding.
• Comparing different investments. A bond fund and an all-equity ETF have different risks and expected returns. Fee comparisons are most useful between funds with similar holdings.
• Assuming a higher fee buys a higher return. The fee is certain; any extra return is not.
• Ignoring where the money is held. Fees in a TFSA, RRSP or FHSA compound out of sight for decades. To see how those accounts grow, try the TFSA, RRSP and FHSA growth calculator.

When is it worth talking to a professional?

Talking to a professional is worth it when a fee difference is large and the switch is not simple. Moving money can trigger costs the calculator does not include, such as sales charges on older mutual fund purchases, transfer-out fees, or capital gains tax when selling in a non-registered account. A fee-only financial planner, who is paid by you rather than by commissions, can review the whole picture.

If you already have an advisor, ask for your all-in annual cost in dollars and what services it covers. Bring the calculator’s side-by-side table to that conversation: it shows what the fee difference would mean for your balance with your own numbers. This page explains how fees work; it is not personalized advice about any product.