We walk in for paper towels, a rotisserie chicken, and a $1.50 hot dog, then walk out $300 lighter with a kayak we didn't plan to buy.
But the sharpest savings this season aren't hiding in the middle aisles or the freezer section.
They're buried in less glamorous corners of the warehouse, and spotting them takes a little strategy.
The first place to look is the price tag itself.
Costco uses a quiet code that tells you whether an item is a steal or a trap.
Prices ending in .97 mean the store has marked it down for clearance.
Prices ending in .00 or a strange number like .49 usually signal a manager's special or a one-time buy.
Learning this one trick can change how you shop every single trip.
A little star in the upper right corner of a sign means the item isn't being reordered.
That's your cue to grab it now if you actually need it, because once it's gone, it's gone.
Combine an asterisk with a .97 ending and you've found the sweet spot.
Costco rotates its inventory on a roughly quarterly cycle, with new merchandise landing at the start of each season.
The last few weeks of a season are when patio furniture, holiday decor, and seasonal clothing get slashed.
If you can wait until late summer for grills or early January for winter gear, the discounts get steep.
The food court remains the most reliable deal in America, even if the $1.50 hot dog hasn't budged in decades.
But the real grocery wins are in bulk staples you'll actually finish: olive oil, coffee, rice, canned goods, and pharmacy items.
Prescription prices at Costco are often dramatically lower than at chain drugstores, and you don't even need a membership to use the pharmacy in most states.
The basic Gold Star card runs $65 a year, while Executive membership costs $130 and pays back 2% on most purchases.
If you spend more than $3,250 annually, the Executive card pays for its own upgrade.
For families buying groceries, gas, and household goods, that threshold arrives faster than you'd think.
Gas alone can cover it, since Costco fuel typically undercuts nearby stations by a meaningful margin.
One caution: not every bulk buy saves money.
A giant jar of something you'll toss half of is a loss, not a deal.
And the famous "treasure hunt" layout is engineered to make you linger and add impulse items.
Go in with a list, and treat the .97 tags as the only real green light.
If you're chasing bigger savings, stack deals.
Costco frequently runs instant rebates on electronics, tires, and appliances that beat most competitors without a mail-in form.
Warehouse coupons now load automatically to your membership card, so you don't have to clip anything.
Just check the monthly savings book before a big purchase.
Our take: Costco rewards discipline more than enthusiasm.
The members who save the most aren't the ones who buy the most, they're the ones who read the tags, wait for the cycle to turn, and know the difference between a bargain and a bulk mistake.
Final Thoughts
Master the price code and the asterisk, and your next receipt might finally tell a happier story.