Do Canadians pay US tax on US dividends and stock gains?

Why dividends and capital gains are taxed so differently

The US taxing rights over a non-resident's investment income depend on the type of income involved. A dividend is US-source income paid by a US corporation, so the US taxes it at the source through withholding, before it ever reaches your account. A capital gain from selling a US stock is generally sourced to the seller's country of residence under US tax rules, not to the US, so for a Canadian resident who is not a US citizen, US green card holder, or otherwise engaged in a US trade or business, the gain falls outside US taxing jurisdiction entirely.

Interest income from a US bond or a US-dollar savings account sits closer to the capital gains side of this line: most interest paid to a Canadian resident is exempt from US withholding under the treaty's interest article, so a US Treasury bond or a US bank deposit generally does not carry the same 15% drag that a dividend does. The distinction matters when building a portfolio across the border, since the tax cost is concentrated almost entirely in equity dividends rather than spread evenly across every type of US investment income.

How the treaty reduces dividend withholding to 15%

Without the treaty, US dividend withholding on a foreign investor defaults to 30%. The Canada-US tax treaty reduces that rate to 15% for a Canadian resident, but only if your broker has a valid Form W-8BEN on file certifying your Canadian residency. Without it on file, the broker is required to withhold at the full 30% rate regardless of where you actually live. Most Canadian discretionary and self-directed brokerage accounts handle this automatically when the account is opened, but it is worth confirming, especially on an account opened years ago or one moved between institutions, since a missing or expired W-8BEN is a common reason for over-withholding.

Every dollar withheld shows up on a Form 1042-S issued after year-end, which is the document you use to support the foreign tax credit claim on your Canadian return. If 30% was withheld instead of the treaty rate of 15%, the difference generally has to be recovered by filing a US non-resident return, since a broker will not retroactively refund an over-withholding once the year is closed.

Why capital gains are the more favourable side

Because a Canadian resident's capital gains on US stocks fall outside US taxing jurisdiction, there is no US withholding, no US return required for the gain itself, and no 1042-S issued for it. Canada is the only country taxing the gain, at the standard 50% inclusion rate that applies to any capital property. This asymmetry means the tax cost of holding US stocks comes almost entirely from the dividend stream, not from price appreciation, which matters when comparing a dividend-heavy US stock to a growth stock that pays little or nothing.

Reporting both sides on the Canadian return

Both the dividends and the gains are reported as part of worldwide income on your T1, converted to Canadian dollars using the appropriate exchange rate for each. The dividend income is grossed up to the full US-dollar amount before the 15% withholding, not the net amount received, and the foreign tax credit is then claimed for that withholding on Form T2209. The capital gain or loss is calculated the same way a Canadian stock transaction would be, using the adjusted cost base and proceeds converted at the rates in effect on each transaction date.

• Keep the annual brokerage summary and the 1042-S together; they should reconcile to the same withheld amount.
• Confirm your W-8BEN is current, since it generally expires at the end of the third calendar year after signing.
• Track adjusted cost base in Canadian dollars as purchases happen, rather than reconstructing it at tax time.

Where a US brokerage account changes the picture

Holding US stocks through a Canadian brokerage is the most common and simplest setup, but a Canadian who also holds a US-listed stock inside an RRSP gets the dividend withholding eliminated entirely under a separate treaty provision for retirement accounts, which does not extend to a TFSA. A Canadian who instead holds an account directly at a US brokerage, rather than a Canadian one, should also confirm whether that account itself creates any additional US filing questions, since account location and residency can interact in ways worth reviewing individually.

US stocks held personally also count toward the specified foreign property a Canadian resident has to disclose once total cost crosses the usual T1135 threshold, though shares held inside an RRSP, RRIF or TFSA are excluded from that count. A large non-registered US stock portfolio is a common reason a Canadian first has to think about T1135 filing at all, separate from the dividend and capital gains treatment covered here.

How we handle US investment income for clients

We check that the W-8BEN is current, reconcile the 1042-S against brokerage statements each year, and make sure the foreign tax credit claimed matches what was actually withheld rather than an estimate. Where a client has been over-withheld at 30%, we look at whether a US return can still recover the difference, and where the T1135 threshold has been crossed, we fold that filing into the same annual review. Our cross-border tax services cover this as part of the annual return for clients with US investments.

Source: IRS — About Form W-8 BEN.