BMO: The First Big Five to Go Commission-Free — And Why the Market Shouldn't Flinch

On September 14, 2026, Bank of Montreal becomes the first of Canada's five largest banks to charge zero commissions on stock and ETF trades through its InvestorLine self-directed platform. Options trades lose their commission fee too, with per-contract costs cut from $1.25 to $0.90. Brokerage account administration fees vanish as well.

It is the boldest pricing move a Canadian "Big Five" bank has made in retail investing. And it is also a move that, properly understood, should not shake your view of BMO's earnings trajectory.

The commission revenue being waived is a rounding error

The instinctive worry is simple: BMO just threw away a stream of income. The data says that stream is tiny.

InvestorLine generated 9% of BMO's wealth management division revenue in the third quarter of fiscal 2026, according to reporting from the bank's August 25 earnings release. That entire division contributed C$480 million in adjusted net income for the quarter — up 22% year-over-year, with wealth and asset management revenue growing 24% to record levels. Total bank revenue for Q3 was C$9.96 billion.

Working backward from the 9% revenue share, InvestorLine's revenue spans far more than trading commissions — options, mutual fund sales, deposit balances, lending, and advisory services all contribute — and the commission income on stock and ETF trades directly waived by this change represents only a fraction of that total. The per-trade commission BMO charged before this change was $9.95 for a standard stock or ETF trade. Spread across millions of trades per quarter, that adds up — but not to a number that meaningfully dents a C$40-billion annual revenue machine.

National Bank of Canada, Canada's sixth-largest lender, eliminated its online brokerage commissions back in August 2021. Five years later, it is still operating profitably. The survival of one peer's experiment should ease fears about BMO's.

The real story is the "front door" strategy

BMO CEO Silvio Stroescu framed this move not as a pricing war but as a question of friction. Younger investors, particularly clients under 35, view transaction fees as a drag on their portfolios. Removing that barrier is about access, not just affordability.

The strategic logic runs deeper. BMO has been describing InvestorLine as a "powerful front door" — a bridge from basic retail banking into wealth management, private banking, and advisory services as clients' financial needs evolve. The bank's own data supports the model: total assets under administration at InvestorLine grew at a 14% compound annual rate from 2020 to 2025, and clients under 35 are the fastest-growing segment.

Commission-free trading accelerates that flywheel. More traders open accounts. More assets flow in. More clients graduate into higher-margin products — mutual funds, portfolio management, lending — where BMO's distribution advantages and relationship depth actually matter. A trader who starts with commission-free stock purchases may later allocate savings into a BMO-managed fund or take a mortgage through the bank. That customer lifetime value is the real prize.

Other fees survive the change. Foreign exchange charges, wire transfers, and other transactional costs remain on the books. The bank still earns from the ecosystem around trading, not just the trade itself.

The competitive pressure was real either way

BMO is not the first Canadian brokerage to go commission-free. Wealthsimple and Questrade have offered $0 commissions on stocks and ETFs for years. Wealthsimple, in particular, has been the fastest-growing online brokerage in Canada by assets and trading volume, according to its own 2026 reporting. Robinhood also entered the Canadian market in 2026 after acquiring cryptocurrency platform WonderFi.

For years, the Big Five banks have been losing younger, digitally native retail investors to these competitors. TD Direct Investing has a limited commission-free ETF list but still charges $9.95 per standard stock trade. BMO's move makes it the first Big Five bank to eliminate stock and ETF commissions, closing that gap — or at least stopping it from widening.

The question now is whether the other Big Five banks will follow. National Bank's precedent suggests they will have to, eventually. BMO's first-mover advantage within its peer group could capture a disproportionate share of new clients before competitors react.

Where the stock sits

BMO closed at approximately C$175 on September 11, 2026. The stock trades at a trailing P/E of roughly 18.8x — slightly above peers like Royal Bank of Canada (17.8x) and TD (18.1x), but below the range of a stock that has been punished by market concerns. Its dividend yield of 2.8% is solid, and the bank has paid a dividend for 19 consecutive years.

Adjusted earnings per share for Q3 were C$3.96, up 22% year-over-year, with return on equity at 14.0% — inching toward management's 15% target for fiscal 2027. The Wealth Management division is growing faster than the rest of the bank, and commission-free trading, if it drives the asset inflows and client conversion management expects, would support that trend.

But the stock is not cheap. A P/E above the peer median means the market is already pricing in solid execution. The commission-free announcement does not change that. It is a strategic necessity that happens to be cost-acceptable, not a catalyst that rewrites the earnings model.

The verdict: A necessary move, not a reason to buy or sell

BMO's elimination of trading commissions is the right thing to do for the right reasons. The revenue impact is minimal. The strategic logic — converting retail traders into lifetime wealth management clients — is sound and backed by years of asset growth at InvestorLine. The competitive alternative — doing nothing while Wealthsimple and Questrade pull younger investors away — would have been worse.

For holders, this is not a reason to sell. For watchers, it is not on its own a reason to buy. The stock already reflects good execution, and its valuation does not leave much room for error. If InvestorLine's asset growth accelerates materially in the next two to four quarters — or if rival banks are forced into a fee-cutting spiral that further erodes their revenue without equivalent strategic benefit — the investment case strengthens. But until that evidence arrives, the commission-free announcement is best understood for what it is: a smart, low-cost adaptation to a changing market. Not a transformation, but a necessary step forward.