Most of us walk the same route: TVs up front, produce in the middle, rotisserie chicken at the end.
But that routine may be costing you money, because some of the warehouse club's best discounts are tucked into corners that regulars rarely check.
Costco marks down slow-moving inventory with prices ending in .97, and those items are almost always on an endcap rather than in their usual aisle.
A patio set listed at $399.97, for example, is a final markdown, not a sale.
If you see the same item online for more, that's your signal to grab it now.
Costco uses a quiet code, and once you learn it, you can read a deal at a glance.
Those ending in .97 are manager markdowns.
A tag with a .00 ending means a manager special that varies by store, and an asterisk in the upper right corner means the item is discontinued and won't be back.
An asterisk plus a .97 price is the deepest cut you'll typically find.
Then there's the monthly savings book, which regulars call the "coupon book" even though no clipping is required.
Discounts apply automatically at checkout.
Most deals run for about a month, but the best ones, especially on electronics and small appliances, often land in the final week when stores want to clear the floor.
Grocery inflation has made the food aisles worth a closer look.
Costco's Kirkland Signature line undercuts national brands on staples like coffee, olive oil, and paper goods, often by 20% or more.
A five-pound bag of coffee is only a bargain if you'll actually drink it before it goes stale.
For smaller households, splitting bulk purchases with a neighbor or family member turns a good price into a great one.
Don't overlook the gas station and the food court.
Costco fuel routinely runs 10 to 30 cents below nearby stations, and members don't need a minimum purchase.
The $1.50 hot dog and soda combo has stayed at that price for decades, a loss leader designed to keep you in the building.
If you're already there for gas, the food court is a cheap lunch, not a splurge.
One more note for the budget-minded: membership math matters.
The Gold Star membership runs $65 a year, while Executive costs $130 and pays back 2% on most purchases, up to $1,250 a year.
If you spend roughly $3,250 annually, the Executive card pays for its own upgrade.
Below that, the basic membership usually wins.
Costco also periodically runs new-member promotions that throw in a shop card worth $20 to $40, which effectively cuts your first year's fee.
The bigger lesson is that warehouse clubs reward attention, not loyalty alone.
The same store that sells you a $5 chicken is also running markdowns on furniture, clothing, and seasonal goods that most members never notice.
Learning the tag code and checking endcaps takes about two minutes per trip.
Our take: Costco deals are real, but they aren't automatic.
The savings go to shoppers who know what the price endings mean and who can resist buying in bulk just because the unit price looks good.
Final Thoughts
Treat the membership as a tool, not a trophy, and the math usually works in your favor.