Canada Costco Canada periodically lists 1 oz gold bars online for members — most often the PAMP Suisse Lady Fortuna bar and the Rand Refinery 1 oz bar, both 99.99% pure. Stock appears without warning and typically sells out within hours, so availability is the biggest hurdle.
Costco's markup over the live spot price is usually modest — often around 2–3% — which is competitive with dedicated bullion dealers. Compare the listed price with the live CAD spot price on this site before buying: divide Costco's price by the spot price per ounce to see the exact premium you are paying.
The cashback stack is what makes Costco famous among gold buyers. Executive members earn 2% back on the purchase, and paying with the CIBC Costco Mastercard adds another 2%. Together that is roughly 4% back, which can bring the effective price below spot on a good day.
Investment-grade gold of at least 99.5% purity is zero-rated for GST/HST under the Excise Tax Act, so no sales tax is added to these 99.99% bars at checkout.
One important caveat: Costco does not accept returns on gold bars. Once you buy, selling means going to a bullion dealer or bank buyback desk and accepting their bid, which is usually a few percent under spot. Factor that spread in before treating the cashback as profit.