Costco’s Canadian sales continued to grow in June, although at a more moderate pace following several months of unusually strong gains for the warehouse retailer.
Comparable sales in Canada increased 3.7 per cent during the five-week period ending July 5, 2026. When the effects of gasoline prices and foreign exchange are removed, Canadian comparable sales rose 4.9 per cent, indicating that underlying demand remained healthy despite a noticeable deceleration from earlier in the fiscal year.
The latest results arrive as Costco undertakes a significant expansion of its Canadian warehouse network. Retail Insider recently reported on a series of new locations planned or under development across the country, including warehouses serving rapidly growing suburban communities and markets where existing stores are experiencing capacity pressures.
Together, the sales and real estate activity offer a broader picture of Costco’s Canadian strategy. Growth may be settling into a more sustainable range after an exceptionally strong period, but the company continues to generate enough momentum to support substantial long-term investment in the market.
Canadian Growth Returns to a More Moderate Pace
Costco’s June performance was considerably softer than the double-digit reported comparable sales increases recorded in Canada during several earlier periods.
Canadian comparable sales rose 10.7 per cent during Costco’s fiscal third quarter, or 6.2 per cent after adjusting for gasoline prices and foreign exchange. April comparable sales increased 11.5 per cent as reported and 7.6 per cent on an adjusted basis.
June’s 3.7 per cent reported increase therefore represents a clear moderation. However, the monthly result does not necessarily point to a significant deterioration in Costco’s Canadian business.
For the first 44 weeks of fiscal 2026, Canadian comparable sales remained 8.5 per cent above the previous year. Adjusted comparable sales were up 7.2 per cent over the same period, providing a more representative view of Costco’s performance than a single five-week reporting window.
The figures suggest Costco continues to attract additional spending from Canadian members, even as the extraordinary growth recorded earlier in the year begins to normalize.
Foreign exchange also weighed heavily on the reported result. Costco said currency movements reduced Canadian comparable sales by approximately three percentage points in June. Higher gasoline prices offset part of that pressure, which helps explain why the reported and adjusted figures were separated by 1.2 percentage points rather than the full currency impact.
The adjusted result of 4.9 per cent is therefore the more useful indication of activity within Costco’s Canadian warehouses.
Expansion Plans Signal Confidence in Canada
Costco currently operates 115 warehouses in Canada and has been advancing one of its most active development pipelines in years.
Retail Insider recently identified numerous traditional warehouse projects that are planned, under construction or preparing to open across several provinces. The activity includes stores in expanding metropolitan areas, secondary markets and communities where Costco appears to see room for additional capacity.
The development strategy is notable because new Costco warehouses require large sites, substantial capital investment and a sufficiently broad trade area to support the company’s high-volume operating model. The retailer must also be confident that a new location can attract enough members and sales without excessively weakening nearby warehouses.
Costco said cannibalization reduced company-wide comparable sales by approximately half a percentage point in June, illustrating one of the considerations involved as the chain adds locations. The company did not provide a separate cannibalization figure for Canada.
In some Canadian markets, a new warehouse can relieve pressure on an existing high-volume store while creating a more convenient option for members who previously travelled considerable distances. Costco can therefore expand its reach while improving the shopping experience within established markets.
The sustained Canadian sales gains recorded during fiscal 2026 provide a supportive backdrop for that investment. Even after June’s moderation, Costco is expanding from a position of strength.
Value Proposition Remains Central to Costco’s Performance
Costco’s resilience reflects a retail model that is particularly well suited to an environment in which households remain concerned about affordability.
The company’s membership structure creates recurring fee revenue while encouraging shoppers to consolidate purchases and visit regularly. Its limited product assortment allows Costco to buy large quantities from suppliers, maintain rapid inventory turnover and concentrate sales within a relatively small number of items compared with a conventional supermarket or mass merchant.
This operating model supports Costco’s reputation for value while helping the retailer maintain a distinctive mix of groceries, general merchandise and seasonal products.
Kirkland Signature is also an important competitive advantage. Costco’s private-label assortment spans food, household products, apparel, health products and other categories, giving the retailer greater control over product specifications and pricing.
For consumers, Kirkland Signature can provide an alternative to higher-priced national brands while carrying Costco’s implicit endorsement of the product. For the retailer, it strengthens differentiation because many of the items cannot be purchased from a competing supermarket, warehouse club or mass merchant.
That combination of value, quality and exclusivity can be especially effective when consumers are scrutinizing household expenses but remain reluctant to compromise on product quality.
Costco also attracts a broader customer base than retailers positioned strictly around discount pricing. Its warehouses serve value-conscious families, small businesses and relatively affluent households, allowing the company to participate in essential spending while also generating sales from discretionary categories.
Food and Essential Categories Support Traffic
Costco did not disclose Canadian sales by merchandise category in its June update, meaning company-wide category results should not be treated as a precise description of Canadian purchasing patterns.
Globally, however, food and sundries posted low- to mid-single-digit comparable sales growth, with food, candy and frozen products among the stronger departments. Fresh food sales increased in the mid-single digits, led by bakery and meat.
Non-food comparable sales were positive in the mid- to high-single-digit range, with jewelry, home furnishings and major appliances among the better-performing areas.
Ancillary businesses recorded growth in the high-20-per-cent range, supported by gasoline, pharmacy and hearing aids. Gasoline sales were influenced heavily by higher prices, with the average worldwide selling price per gallon up 22.4 per cent from the previous year.
Digitally enabled comparable sales rose 20.9 per cent globally, or 21.5 per cent after adjusting for currency. Although Costco remains overwhelmingly centred on physical warehouses, the digital result shows that online channels are becoming a larger complement to the in-store business.
Total company net sales reached US$29.24 billion for the five-week June period, an increase of 10.6 per cent from US$26.44 billion a year earlier.
Costco Adds Pressure to Canada’s Grocery Market
Costco’s continued growth has implications for Canada’s major grocery and mass-market retailers.
The company competes for a substantial share of household spending across food, pharmacy, household necessities, apparel, electronics, furniture and other categories. A member visiting Costco for groceries may also purchase products that would otherwise have been bought from a supermarket, drugstore, department store, home furnishings retailer or general merchandise chain.
Its expansion therefore adds capacity to several retail categories at once.
Costco’s scale also allows the company to sharpen consumers’ expectations around unit pricing and private-label quality. While package sizes and upfront basket costs may be higher, members frequently assess value based on the cost per unit and the perceived quality of the merchandise.
That dynamic can place pressure on conventional retailers whose customers increasingly compare prices across channels and divide spending among supermarkets, discount stores, warehouse clubs and online platforms.
Canada’s concentrated grocery market makes Costco’s position particularly significant. Although it operates fewer locations than the country’s largest supermarket groups, each warehouse can draw from an extensive geographic area and generate substantial sales volumes.
The retailer’s growing store network will make Costco more accessible to additional households while increasing competition for grocery spending in the communities it enters.
A Stronger Measure Is the Longer-Term Trend
June’s results show that Costco Canada is no longer growing at the extraordinary reported rates seen earlier in fiscal 2026. That moderation is worth noting, particularly if it continues through subsequent reporting periods.
It would be premature, however, to view one month of slower growth as evidence of a meaningful weakening in the business.
Adjusted Canadian comparable sales still increased 4.9 per cent in June, while the first 44 weeks of the fiscal year produced adjusted growth of 7.2 per cent. Those are substantial gains for a mature retailer operating an established network of more than 100 Canadian warehouses.
The company’s expansion plans provide another indication of its long-term outlook. Costco is committing capital to additional locations at a time when many retailers remain selective about physical growth and consumers continue to manage elevated household costs.
June may mark a return to more typical growth following an exceptional start to the year. Costco’s broader Canadian trajectory, however, remains firmly positive as the retailer builds additional capacity and seeks a larger share of consumer spending across the country.
