Costco's whole pitch is simple: pay a membership fee, buy in bulk, and watch the per-unit price drop below what you'd pay at a regular grocery store.
That math still works in 2025, but not on everything.
Some items carry a markup that wipes out the savings, while a handful of staples keep beating Walmart and Kroger by a wide margin.
Here's where the warehouse chain tends to shine right now, based on shopper reports and price tracking. **Rotisserie chicken.** At $4.99, the famous bird has held steady for years while grocery competitors charge $8 to $12 for a smaller, drier version.
It's the loss leader that gets you in the door, and it's still the single easiest win in the store. **Gas.** Costco fuel typically runs 10 to 30 cents below nearby stations, and the gap widens in expensive metro areas.
If you fill up twice a month, the savings alone can cover a good chunk of your membership. **Kirkland coffee.** The 2-pound whole bean bags land well under name-brand equivalents per ounce, and shoppers consistently rate them close in taste.
Same story with Kirkland olive oil, vanilla extract, and maple syrup. **Paper goods.** Toilet paper, paper towels, and tissues stay among the cheapest per-sheet options anywhere.
The catch is storage space, which is why these buys make the most sense for bigger households. **Pharmacy and optical.** Prescription prices at Costco often undercut CVS and Walgreens, and you don't need a membership to use the pharmacy in most states.
Eyeglasses and contacts also come in well below typical retail. **Rotisserie-adjacent deli items.** The $9.99 take-and-bake pizza and the $4.99 giant muffins get a lot of attention, but the real value is in the prepared meals that feed a family for under $20. **Gas-adjacent impulse buys aren't the deal.** The trap is everything in the middle of the store.
Snack mixes, seasonal decor, and oversized candy bags feel cheap but often cost more per ounce than a grocery store sale.
Bulk only saves money if you'd actually buy that quantity anyway.
Check the unit price on the shelf tag rather than the sticker, since Costco lists cost per ounce or per sheet.
Watch for the asterisk on price signs, which signals an item is being discontinued and often discounted.
And skip the membership if you live alone or have limited storage, because the annual fee is hard to justify without steady bulk buying.
The bigger picture: grocery inflation has cooled from its 2022 peak, but food prices are still higher than they were four years ago.
Warehouse clubs have become a way for households to claw back some of that.
Costco raised its membership fee in late 2024, so the bar for "worth it" moved up slightly, but for families buying gas and staples regularly, the math still favors showing up. **The bottom line:** Costco rewards discipline, not enthusiasm.
Final Thoughts
Buy the chicken, the gas, the coffee, and the paper towels, and walk past the rest.