The consensus among experienced Costco members is clear: The warehouse can absolutely save you hundreds in 2026, but only if you shop with intention, stick to a list, and focus on areas with proven savings. "I typically go in with a plan — and stick to it. No 'Oh, I absolutely need this blanket' — I stick to my shopping list. Bulk items are only cheaper if you actually use them. You're not saving money if you end up throwing the stuff away because it expired." Thesustainablei