Costco's business model has always been simple: charge a membership fee, sell in bulk, and keep margins razor-thin.
But in 2025, that formula is producing some genuinely lopsided wins for shoppers who know where to look.
The warehouse giant pulled in over $250 billion in annual revenue, and a big chunk of that comes from memberships—meaning the company can afford to lose money on hot dogs and rotisserie chicken to keep you walking the aisles.
The first move is timing your bigger purchases around Costco's markdown cycles.
Items ending in .97 are typically store-specific clearance, and anything with an asterisk in the corner of the price sign means the item isn't being reordered.
That asterisk is your signal to buy now or risk never seeing it again.
Second, the rotisserie chicken at $4.99 remains one of the best loss leaders in American retail.
Costco reportedly loses money on every bird, but it keeps members coming back.
Pair that with the $1.50 hot dog and soda combo—a price that hasn't budged since 1985—and you've got a lunch run that undercuts almost any fast-food option.
Third, watch the pharmacy and optical departments.
Costco's pharmacy consistently ranks among the cheapest for generic prescriptions, and its optical center sells frames and lenses at prices that often beat dedicated eyewear chains by 40% or more.
You don't even need a membership to use the pharmacy in most states.
Costco fuel routinely runs 20 to 40 cents cheaper per gallon than nearby competitors, and with a typical 15-gallon fill-up, that's real money every week.
The catch is the lines, which is why early mornings and weeknights tend to move faster.
Fifth, consider the executive membership if you're already spending heavily.
It costs $130 a year versus $65 for the basic tier, but it pays 2% back on most purchases.
If you spend more than $3,250 annually—easy for a family—the upgrade pays for itself.
Sixth, don't sleep on the Kirkland Signature brand.
It's not just a knockoff label; many Kirkland products are made by the same manufacturers behind name brands.
Coffee, vodka, batteries, and paper goods are common standouts where the savings add up fast.
Seventh, stack the Costco Anywhere Visa card on top of your membership.
It offers 4% back on gas, 3% on restaurants and travel, and 2% on everything else at Costco.
Combined with executive rewards, some members effectively shave 4% or more off their total warehouse spending.
Bulk buying only saves money if you actually use what you buy, and impulse purchases in those wide aisles can wipe out any gains.
Bring a list, stick to it, and treat the treasure-hunt aisles as a bonus rather than the main event. **The bottom line:** Costco rewards members who treat it like a strategy, not a spectacle.
The deals are real, but they favor shoppers who know the pricing codes, time their trips, and let the membership perks compound.
Final Thoughts
Skip the impulse buys and the savings math works in your favor almost every time.