Is Costco cheaper than Amazon for household basics?

Often, yes—Costco is usually cheaper per unit for household basics if you can use bulk sizes before they expire or before storage becomes a problem. Amazon is often better when you need smaller quantities, want subscription convenience, or are comparing one-off sale prices.

Best rule of thumb: compare unit price, not sticker price. For paper towels, toilet paper, trash bags, laundry detergent, dish soap, batteries, and pantry staples, Costco frequently wins on cost per roll, ounce, sheet, pod, or bag—especially with Kirkland Signature items. Amazon can beat Costco during coupons, Subscribe & Save discounts, Prime Day-style events, or when Costco’s bulk size is too large for your household.

Also factor in membership and shipping: Costco’s savings matter most if you already have a membership or buy enough annually to offset it. Amazon may look cheaper if delivery is included for you and Costco requires a separate trip, but Amazon prices can fluctuate more item by item.

Practical answer: Costco is likely cheaper for high-use basics you buy repeatedly in bulk; Amazon is likely better for low-use items, specialty brands, small apartments, and urgent delivery.