The Best Brokerage for USD Trading in Canada

For Canadian investors, the domestic stock market represents roughly 3% of the global equity market. To build a truly diversified portfolio, or to invest in the world's largest technology companies, you must inevitably look south of the border and buy US-listed stocks and ETFs. However, the moment you step outside of the Canadian dollar (CAD), you encounter the most pervasive and destructive hidden fee in the Canadian brokerage industry: the foreign exchange (FX) markup.

If you are actively trading US equities, or even just holding a large portfolio of US index funds, choosing the wrong brokerage can cost you tens of thousands of dollars over a lifetime of investing. This guide is dedicated exclusively to finding the best platform for handling US dollars. If you want a broader overview of the entire industry, read our master guide on the Best Canadian Brokerages for 2026.

The Problem: The 1.5% Hidden Tax

When you attempt to buy a stock like Microsoft (MSFT) on a standard Canadian brokerage account using Canadian dollars, the brokerage performs an automatic currency conversion on your behalf. They take the current corporate exchange rate and add a "markup" or "spread."

The industry standard markup in Canada is 1.5%.

This means if you buy $10,000 CAD worth of Microsoft, you are charged a hidden $150 fee. Crucially, this fee is charged again when you sell the stock and the proceeds are converted back to CAD. A 3% round-trip penalty guarantees significant underperformance compared to the actual stock market returns.

To invest in the US efficiently, you need two things from your brokerage:

1. Native USD Accounts: The ability to hold US dollars directly in your RRSP, TFSA, or Margin account so that when you sell a US stock, the proceeds remain in USD, preventing a forced conversion back to CAD.
2. A Cheap Conversion Method: A way to initially convert your CAD to USD without paying the 1.5% markup.

The Undisputed Champion: Interactive Brokers (IBKR)

If your primary concern is trading US equities cheaply and efficiently, Interactive Brokers (IBKR) is objectively the best platform in Canada. It is not a debate; it is mathematical fact.

Why IBKR Wins: Spot Rate Conversions

Unlike every major bank and discount broker in Canada, IBKR operates as a global brokerage. They do not charge a 1.5% markup on currency conversion. Instead, they allow you to exchange currency directly on the forex market at the "spot rate" (the true, real-time interbank exchange rate).

IBKR simply charges a tiny, flat commission for executing the trade—typically around $2.00 USD. Whether you are converting $1,000 CAD to USD or $500,000 CAD to USD, you get the actual market rate and pay roughly two dollars. This feature alone saves active traders fortunes. You do not need complex workarounds or third-party services. You simply click "Convert Currency."

Furthermore, their commission on US stocks is incredibly low (often $0.005 per share), and they offer native USD holding across all account types. While the platform has a very steep learning curve (it is not the best brokerage for beginners), the financial benefits for US traders are undeniable. Read our full analysis of Interactive Brokers Canada for details on their tiered pricing and margin rates.

The Silver Medalist: Questrade (and Norbert's Gambit)

If you find IBKR's platform too complex or intimidating, Questrade is the clear runner-up and the most popular choice for intermediate Canadian investors dealing with US dollars.

Native USD Support: Questrade natively supports USD holding across all of its accounts (TFSA, RRSP, Margin, etc.) without any monthly subscription fees. If you sell a US stock, the cash stays in USD.

Norbert's Gambit: Because Questrade still charges a standard 1.5% FX markup on automatic conversions, investors use a strategy called Norbert's Gambit to bypass it. This involves:

1. Buying a dual-listed ETF (usually Horizon's DLR.TO) using Canadian dollars. (Questrade offers free ETF purchases, so this step costs nothing).
2. Asking Questrade to "journal" those shares over to the US-dollar equivalent (DLR.U.TO).
3. Selling DLR.U.TO to receive US dollars. You pay Questrade's standard commission (min $4.95) to sell the ETF.

By executing Norbert's Gambit, you effectively convert CAD to USD for a flat fee of $4.95, regardless of the size of the conversion. While it takes a few days for the trades to settle, it is an incredibly powerful tool. For a detailed comparison of how Questrade's overall fee structure stacks up against the zero-commission players, see our Wealthsimple vs Questrade guide.

The Big Bank Alternatives: National Bank and BMO

If you insist on using a major bank brokerage but still want to efficiently handle USD, your options are limited but viable.

National Bank Direct Brokerage (NBDB): NBDB eliminated trading commissions entirely, making them highly attractive. Like Questrade, they support USD accounts and Norbert's Gambit. Because their trades are free, executing Norbert's Gambit on NBDB is technically free (costing only the bid-ask spread of the ETF). This makes them a strong contender, though their platform is clunkier than the independents.

BMO InvestorLine: While BMO charges $9.99 per trade, they are widely praised for how easily they facilitate Norbert's Gambit. Unlike some brokerages where you must call a representative and wait on hold to journal the shares, BMO allows you to execute the entire process seamlessly online.

For an in-depth look at why investors choose big banks despite the fees, read our TD Direct vs Discount Brokers breakdown.

The "Avoid for USD" Warning: Wealthsimple Trade (Basic)

Wealthsimple Trade is a phenomenal app for buying Canadian stocks, but its basic tier is the absolute worst platform in Canada for trading US equities.

On the standard (free) Wealthsimple tier, you cannot hold US dollars. Every single time you buy a US stock, you pay the 1.5% conversion fee. Every single time you sell, you pay it again. Furthermore, Wealthsimple does not support Norbert's Gambit.

The Premium Workaround: Wealthsimple attempted to solve this by introducing USD accounts via their "Plus" subscription ($10/month) or for free if you hold over $100,000 in assets (Premium tier). While this solves the problem of forced conversions on every trade (allowing you to hold USD after you sell a stock), you still cannot use Norbert's Gambit. This means whenever you inject new CAD into the account and want to buy US stocks, you must pay the 1.5% markup. If you are converting large sums (e.g., $10,000+), the 1.5% fee ($150) dwarfs the $10/month subscription cost.

Unless you are wealthy enough to qualify for the free Premium tier and simply value extreme convenience over optimal fee structure, Wealthsimple is not the answer for US trading. You can read our complete Wealthsimple Review 2026 for a deeper dive into their premium offerings.

The Verdict: Choosing Your Platform

The decision tree for USD trading in Canada is straightforward in 2026:

• If you are an active trader, trade options, or convert currency frequently: Open an account with Interactive Brokers (IBKR). The spot-rate conversion and micro-commissions are unbeatable. Compare them directly in our Questrade vs IBKR guide.
• If you buy US ETFs occasionally, prefer a simpler platform, and don't mind spending 5 minutes to execute Norbert's Gambit: Use Questrade or National Bank Direct Brokerage.
• If you only buy Canadian-listed stocks and ETFs (like XEQT or VFV): Stick with Wealthsimple. If you are buying a Canadian-listed ETF that holds US stocks (like VFV), the currency conversion is handled internally by Vanguard at institutional rates; you do not pay the 1.5% Wealthsimple fee.

Mastering currency conversion is the hallmark of an intermediate Canadian investor. Do not let hidden FX fees erode your hard-earned alpha.