Costco September sales rise 13% to $30.02B; comparable sales up 11.4%

Costco reported September 2026 net sales of $30.02 billion for the five-week retail month ended October 4, up 13.0% from a year earlier. Total comparable sales rose 11.4%, or 7.6% excluding gasoline prices and currency effects, and a Labor Day calendar shift added a little over 50 basis points. The adjusted comparable figure is the cleaner read on underlying traffic and spending.

• September net sales $30.02B, up 13.0% (five weeks to Oct 4, 2026)
• Total comparable sales +11.4% reported, +7.6% excluding gasoline and FX
• U.S. comparable sales +12.5% reported; Canada +6.3%; Other International +10.8%
• Digitally-enabled sales +19.0% as reported
• Labor Day shift added a little over 50 bps to September sales and comps