Costco has earned its reputation as a money-saving haven, but walking through those warehouse doors without a strategy can quickly turn savings into overspending.
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Smart shoppers say the key to maximizing your membership isn’t just about buying in bulk — it’s about being strategic with every purchase.
Stick To Your Shopping List
For many Costco members, impulse purchases are the biggest budget killer. Research shows shoppers are likely to spend more than expected when visiting warehouse stores due to impulse purchases, with some admitting they go in for milk and leave with hundreds in unexpected items.
“I typically go in with a plan — and stick to it,” said Arlene Dean, a savvy Costco shopper. “No ‘Oh, I absolutely need this blanket’ — I stick to my shopping list. Also, bulk items are only cheaper if you actually use them. You’re not saving money if you end up throwing the stuff away because it expired.”
Dean’s advice is backed by sobering statistics. The average American family of four throws out $1,600 worth of produce per year, according to RTS, making Dean’s strategy of only buying what you’ll actually use critical to real savings.
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Question Every Purchase
Rene Malpica, a Costco shopper of 15 years, takes a different but equally effective approach by applying what he calls the “price check test” to every item that tempts him.
“I stay away from the seasonal décor trap,” Malpica said. “I also go in and always ask myself, ‘Would I buy this somewhere else at this price?’ It helps avoid impulse purchases.”
Consumer finance experts recommend telling yourself you will come back to an unplanned purchase after finishing your shopping — if it’s not something you really need, you’ll likely forget about it and save money.
Maximize Pharmacy and Gas Savings
Both shoppers pointed to two often-overlooked areas where Costco delivers consistent savings year-round.
“The pharmacy is a great way to save money, as is getting gas at Costco — it’s always cheaper,” Malpica said.
Prescription savings range from 2% to 40% or more depending on the medication, and members don’t need to enroll separately — simply present your membership card at the pharmacy. For gas, Costco typically offers savings of 30 to 40 cents per gallon compared to regular stations, according to Costco Gas Price Tracker. Average drivers save $113 per year filling up at Costco, according to Groupon.
Final Take To GO
Members can save hundreds of dollars annually by strategically shopping at Costco, but only by avoiding common pitfalls. The consensus among experienced Costco members is clear: The warehouse can absolutely save you hundreds in 2026, but only if you shop with intention, stick to a list, and focus on areas with proven savings like prescriptions and fuel.
As Dean summed up: buy what you’ll use, not what seems like a good deal.
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This article originally appeared on GOBankingRates.com: The One Shopping Habit That Can Save Costco Members Hundreds in 2026
