What a 1% MER Really Costs You

Updated June 1, 2026

When you put money in a mutual fund or ETF, the company running it charges a yearly fee called the MER — the Management Expense Ratio. It’s shown as a percentage, like 2.0% or 0.20%.

Here’s the catch that trips up almost everyone: that fee is charged on your entire balance, every single year — whether the fund goes up, down, or nowhere. And the money taken out as fees is money that can never grow for you again. That’s why a “small” percentage turns into a shockingly large number over time.

”It’s only 1%” — why that’s misleading

One percent sounds harmless. But you don’t pay it once — you pay it every year, for decades, on a balance that’s meant to be compounding in your favour.

Think of it like a slow leak in a bucket you’re trying to fill. Each year the leak takes a little, and worse, it takes water that would have helped fill the bucket faster. The longer you go, the bigger the difference between a bucket with a leak and one without.

The real numbers (Canadian example)

Say you start with $10,000, add $500 a month, and the market returns 6% a year before fees, for 30 years.

At a 0.2% MER (a typical low-cost index ETF), you’d end up with about $540,000.
At a 2% MER (common for bank mutual funds), you’d end up with about $380,000.

That gap — roughly $160,000 — is what the higher fee costs you. It’s about 30% of your potential nest egg, gone to fees, for holding similar investments in the same market.

$10,000 plus $500/month for 30 years at a 6% market return. The two lines start together and quietly drift apart — that widening gap is entirely fees.

Even a 1% fee instead of nothing, on the same plan, costs you over $100,000 across 30 years — close to a fifth of the total.

The investments can be nearly identical. The market return can be identical. The only difference is the fee — and the fee compounds against you.

Why the damage grows over time

In year one, a 2% fee on a $10,000 balance is just $200. Easy to ignore. But two things happen:

As your balance grows, 2% becomes a bigger and bigger dollar amount.
Every dollar taken in fees is a dollar that stops compounding for you — so you also lose all the future growth it would have earned.

That second part is the silent killer. Decades later, you’re not just out the fees you paid — you’re out everything those fees would have grown into.

What to do about it

Find out what you’re paying. Look up the MER of every fund you own (see the FAQ below).
Compare it to the alternatives. Broad Canadian index ETFs commonly charge around 0.05%–0.25%. Many bank mutual funds charge 1.5%–2.5%.
Decide what the fee buys you. Paying for genuinely helpful advice can be reasonable. Paying 2% for a product you could hold yourself cheaply usually isn’t.

You don’t need to time the market or pick winners to come out ahead here. Cutting your fee is one of the few sure things in investing — the savings are basically guaranteed math.

See it for yourself: plug your own numbers into the investment fee calculator, or build a low-cost portfolio in the ETF portfolio calculator.

This is general education, not financial advice.

Frequently asked questions

Where do I find my fund's MER?

It's listed in the fund's two-page "Fund Facts" document and on the provider's website. If you invest through a bank advisor, you can simply ask them for the MER of each fund you own.

Is paying any fee always bad?

No — a fee for genuine, valuable advice can be worth it. The problem is paying a high product fee (like 2%) for an investment you could hold yourself for a fraction of the cost. Know what you're paying and what you get for it.