How Canadian Banks Make Billions on Foreign Exchange (And What You Can Do About It)

Every quarter, Canada's Big Five banks report their earnings. Buried in those reports — under line items like "non-interest revenue" and "trading income" — are the billions they earn from foreign exchange.

Not millions. Billions.

And a significant chunk of that money comes from a simple mechanism: charging customers a worse exchange rate than the real one, without disclosing the difference.

Here's how the FX profit machine works, how much the banks are actually making, and what Canadian businesses can do to stop leaving money on the table.

The Numbers: Big Five FX Revenue

Canadian banks don't break out FX markup revenue as a standalone line item (that would make it too easy to see). But their annual reports reveal the scale through "trading revenue" and "foreign exchange revenue" disclosures.

Based on public filings, the Big Five banks collectively generate an estimated $5–$8 billion annually from foreign exchange activities. This includes:

• FX trading profits from institutional and commercial clients
• Retail and business FX markups on currency conversions
• FX-related revenue from international wire transfers
• Trading desk profits from currency market-making

Not all of this comes from small business markups — institutional FX trading is a big piece. But retail and commercial FX markups are an enormously profitable segment precisely because the margins are so high. A bank's FX trading desk might operate on spreads of 0.01%–0.05%. Your business account operates on spreads of 1.5%–3%.

The retail/commercial side generates outsized profit per dollar converted — and businesses are the biggest source of that margin.

How the Machine Works

The FX profit machine relies on three pillars:

1. Opacity

Banks don't tell you what the mid-market rate is. They just give you "their rate." There's no law requiring them to disclose the spread. There's no standardized comparison format. There's nothing on your statement that says "you paid 2.3% above the real exchange rate."

This opacity is the foundation of the entire business model. If every bank statement showed the mid-market rate alongside the bank's rate, customers would revolt. For a detailed explanation of how this opacity works, see our piece on mid-market rate vs bank rate.

2. Bundling

FX is bundled with your banking relationship. You don't "shop" for an exchange rate the way you shop for a mortgage rate. You convert currency through whatever bank holds your business account because it's easy — log in, click convert, done.

This convenience creates massive switching friction. Even if you know you're overpaying, moving your FX to a separate provider feels like work. Banks design their products to keep everything under one roof, and they extract margin on the pieces you're least likely to scrutinize.

3. Scale

The Big Five serve the vast majority of Canadian businesses. When you can charge 2% to millions of customers who don't know they're being charged, the math gets extraordinary.

Consider: Canadian businesses convert hundreds of billions of dollars in foreign currency annually. Even a 1.5% average markup across that volume generates staggering revenue. And because the marginal cost of executing an FX conversion is nearly zero for a bank, almost all of that markup flows straight to profit.

Why Small Businesses Pay the Most

The FX markup system is regressive — smaller businesses pay the highest percentage.

Large corporations have treasury departments that monitor FX rates, negotiate aggressively, and use multiple providers. They might pay 0.1%–0.5%.

Mid-market companies with commercial banking relationships might negotiate down to 0.8%–1.5%. Still expensive, but better than retail.

Small businesses on standard business banking accounts pay the full retail spread: 2%–3%. They're the least likely to know the markup exists, the least likely to negotiate, and the least likely to have the volume that triggers better pricing.

This is the irony: the businesses that can least afford to overpay are the ones paying the most.

The Regulatory Landscape

Unlike mortgage rates, loan fees, or investment management costs, FX markups in Canada are essentially unregulated from a consumer disclosure perspective.

There's no requirement for banks to:

• Disclose the mid-market rate alongside their quoted rate
• Show the FX markup as a separate line item
• Provide a percentage breakdown of the spread
• Compare their rates to any benchmark

Some consumer advocacy groups and fintech companies have pushed for greater transparency, but progress has been slow. The banks lobby hard to maintain the status quo — because it's extraordinarily profitable.

In the EU, the revised Payment Services Directive (PSD2) has forced greater FX transparency. In the UK, similar regulations require clearer disclosure. Canada lags behind.

What You Can Do About It

You can't change the regulatory landscape overnight. But you can stop overpaying today.

Audit Your Current Costs

Most businesses have never calculated their actual FX markup. The first step is seeing the number. When we run audits for businesses, the reaction is almost always the same: "I had no idea."

Run a free FX audit with Loop — upload your bank statements and see exactly what your bank has been charging.

Negotiate

If you're converting more than $500K annually, call your bank and ask for better rates. Mention that you've benchmarked against the mid-market rate. Mention competitor rates. Banks have significant room to improve their spreads — they just won't do it proactively.

For specific negotiation tactics, see our guide to 5 ways SMBs can cut FX costs.

Move Your FX to a Specialist

FX fintechs and specialists offer business accounts with spreads of 0.2%–0.7%. You can keep your business bank account for everything else and just move your currency conversions. It takes a few days to set up and can save thousands per year.

We compare the top options in our guide to FX alternatives for Canadian businesses.

Reduce Unnecessary Conversions

Hold multi-currency accounts. Pay USD expenses from USD revenue. Avoid the round-trip conversion (CAD → USD → CAD) that costs you the spread twice. Every conversion you eliminate is money saved.

The Bottom Line

Canada's Big Five banks have built a multi-billion-dollar FX profit machine on a foundation of opacity and convenience. They're not doing anything illegal. They're just charging a lot for a service that costs them almost nothing — and counting on customers not to notice.

The first step to fighting back is information. Once you know what you're paying, you have the leverage to change it.

See what your bank is really charging → Free FX audit