Costco is emerging as a major beneficiary of the recent spike in US gas prices, which have remained above $4 a gallon for a month and topped $4.50 this week. The warehouse club reported 11.7% US comparable sales growth last month, with fuel sales contributing 3 percentage points of that increase. The fuel business alone saw a 3% boost in comparable sales.
Higher traffic at the pump is drawing more customers into Costco stores, where overall sales are also rising. A Numerator survey shared with Business Insider found that more than nine out of 10 drivers took steps to save on gas in the past month, with the share filling up at club stores climbing three points to 36% compared with April.
The trend underscores how consumers are adjusting their weekly budgets in response to sustained fuel costs. Costco's model — offering discounted gas to members — positions it to capture price-sensitive drivers who might otherwise shop elsewhere.
Retail analysts note that the boost in foot traffic from gas buyers often leads to additional in-store purchases, amplifying the financial benefit. Costco's ability to convert pump visitors into shoppers gives it a competitive edge over traditional fuel retailers.
Some experts caution that the fuel sales lift may fade if gas prices decline, and that membership growth data is needed to gauge long-term impact on customer loyalty.