📊 Fees

How MER Fees Quietly Erode Your Portfolio Over 30 Years

Published June 25, 2026 · 8 min read · By the WealthWise team · Updated October 19, 2026

⚠️ For information only. General facts and concepts; WealthWise is a portfolio analysis tool, not a registered investment advisor and gives no personalized advice. Verify with the sources and consult a licensed professional before acting.

In short — In the fictional example below, $10,000 becomes $43,219 or $71,968 after 30 years under different fee assumptions. The gap depends on the inputs; it is neither a forecast nor a comparison of actual funds with identical risk.

Expenses reduce the value left invested and its potential future growth. To measure that effect, distinguish management fees from the reported MER and use transparent inputs. A low MER alone cannot establish whether an investment fits your circumstances.

MER, management fees and other costs

The management expense ratio (MER) relates management and operating expenses, including applicable taxes, to a fund's average net assets. Management fees alone are not the MER. Published after-expense fund returns already reflect those charges: do not deduct them a second time.

Measure	Read separately
MER	Management and operating expenses
TER in Canada	Internal trading expenses
Investor costs	Brokerage, currency conversion, bid-ask spread, separate advice fees

The MER alone does not describe every cost.

$10,000 over 30 years: a reproducible calculation

Assume $10,000 initially, no additional contributions, and a constant 7% gross annual return. The simplified convention subtracts annual fees from the gross rate, producing model net rates of 5% and 6.8%. Annual compounding gives future value = 10,000 × (1 + net rate)^30.

Fictional scenario	Annual fees	Model net rate	Value after 30 years
Higher fees	2.00%	5.00%	$43,219
Lower fees	0.20%	6.80%	$71,968
Simulated gap	1.80 percentage points	—	$28,748

Nominal Canadian dollars, rounded to the nearest dollar. The gap is 39.95% of the lower-fee ending value, not 39.95% of the initial capital.

The $28,748 gap includes fees and forgone growth; it is not the sum of directly billed charges. It applies only to these inputs. Contributions or different returns change the result.

Limitations: taxes, inflation, commissions, currency conversion and TER are excluded. Reinvestment is assumed. Subtracting annual fees is an approximation, not a reproduction of daily expense accounting. Actual market returns and fees vary; 7% is not a promise.

Lower fees do not mean identical risk

What the simulation shows

The same gross return is assumed.
Only fees change.
The value gap includes compounding.

What it does not establish

Identical assets and risks between actual funds.
Identical future gross returns.
A better future outcome assured for a cheaper fund.

Compare strategy, holdings, liquidity, services and total costs as well. An RRSP, TFSA or non-registered account affects taxation but does not remove fund expenses. Switching may itself incur costs or taxes.

Check the right figure and date

Use ETF Facts for an ETF and Fund Facts for a mutual fund. Check the series and measurement period in the documents and on the official website. A consultation date is not a measurement date.

An example checked on October 19, 2026: VEQT displays a 0.17% management fee and a 0.22% MER. Its ETF Facts dated July 16, 2026 reports that MER as of March 31, 2026. The simulation's 0.20% is fictional, not this ETF's current MER.

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📉 Calculator: impact of management fees (MER)

See how much fees eat into your growth over time.

Amount invested ($)MER / annual fee (%)Gross annual return (%)Years

No-contribution simulation with annual compounding; gross rate minus fees, excluding taxes, inflation and other costs. Actual markets and fees vary.

Frequently asked questions

Does the MER include financial advisor fees?

It depends on the fund and series. A trailing commission may be included in the MER; advice fees may also be billed separately. The MER alone does not always describe the total cost. Check the disclosure documents and your account agreement.

Does a higher MER mean a better-performing fund?

No. The MER describes a past expense ratio, not future performance. Compare the strategy, holdings, risks and other costs as well. Lower fees do not guarantee a higher return either.

Do ETFs have other fees too?

Yes. Besides the MER, there may be internal trading expenses (TER), brokerage commissions, a bid-ask spread and currency-conversion or account fees. Check the ETF Facts and your broker's fee schedule.

How can I assess the fee drag in my RRSP or TFSA?

Compare total costs for scenarios consistent with your horizon and risk tolerance. Include taxes, switching costs and services provided. This simulation is not a recommendation to replace a holding; consult an advisor registered with your provincial securities regulator.

Sources and review

Article reviewed and calculations reproduced October 19, 2026. Product disclosures may cover earlier periods and may change. Educational scenarios, not investment recommendations.