Costco August sales rise 9.9% to $23.70B; comparable sales up 8.4%

Costco's August 2026 retail month, four weeks to August 30, produced net sales of $23.70 billion, up 9.9% from a year earlier. Total comparable sales rose 8.4%, or 5.4% excluding gasoline and currency effects, and U.S. comparable sales grew 9.0%. A later Labor Day shifted some sales out of August and reduced total sales and comps by a little under 75 basis points.

• August net sales $23.70B, up 9.9% from $21.56B (four weeks to Aug 30, 2026)
• Total comparable sales +8.4% reported, +5.4% excluding gasoline and FX
• U.S. +9.0%, Canada +4.0%, Other International +9.5% (reported comparable sales)
• Digitally-enabled comparable sales +17.9%
• Labor Day timing reduced August sales and comps by a little under 75 bps