A Canadian Sells US Stocks: Who Taxes the Gain? Canada Does — the US Almost Never
September 14, 2026
Capital gains on US stocks and ETFs sold by a Canadian resident are taxed by Canada alone: the US does not tax a nonresident's portfolio gains, no withholding applies to sale proceeds, and no US filing results from ordinary trading. The exceptions — real-estate-heavy companies and the 183-day trap — are narrow. Here is the clean rule and its edges.
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