Short answer: Only if — you have the household size and storage space to actually use bulk quantities before they expire.
Worth it for: Families who spend $300+/month on groceries and gas Skip if: You live alone or in a small apartment Better alternative: Walmart+ if you're just chasing delivery convenience
Costco is a temple built for the religion of bulk buying. And like most religions, its followers never question whether the math actually works out.
When It IS Worth It
You fill up a car regularly. Costco gas is consistently $0.20-$0.40/gallon cheaper than surrounding stations. If you drive 15,000 miles a year at 25 mpg, that's 600 gallons. At $0.30 savings per gallon, that's $180/year — the membership pays for itself on gas alone. But only if a Costco is near your commute. Driving 15 minutes out of your way to save $6 on a tank is a net loss when you account for your time.
You have a family of 3+ and a garage or pantry. The unit price savings on staples — rice, chicken, cleaning supplies, diapers — are real. A family spending $400/month at Costco instead of a regular grocery store saves roughly $60-$80/month compared to equivalent national brand pricing. That's over $700/year after the membership fee.
You buy Kirkland Signature everything. This is Costco's secret weapon. Kirkland olive oil, vodka, batteries, and laundry detergent consistently match or beat name-brand quality at 30-50% lower prices. The olive oil is famously sourced from the same suppliers as premium Italian brands. The batteries test within 2% of Duracell.
You use the pharmacy or optical department. Costco's pharmacy doesn't require a membership in most states and offers significantly cheaper prescriptions. But their optical department — membership required — saves $100-$200 per pair of glasses compared to LensCrafters.
When It Is NOT Worth It
You live alone. That 5-pound bag of spinach will decompose into swamp water in your fridge before you finish it. Single people consistently report that food waste cancels out bulk savings. You're not saving money if 30% of what you buy ends up in the trash.
You don't have storage. Bulk buying requires space. If your apartment doesn't have a pantry or unused closet, those 48-roll toilet paper packs are going to live in your living room like furniture.
You can't resist the "treasure hunt." Costco deliberately designs its store layout to make you walk past things you didn't plan to buy. That random sectional couch, the kayak, the industrial-sized jar of Nutella — the average Costco shopper spends $150-$200 per trip. If you came in for eggs and left with a patio set, the membership isn't saving you anything.
You're upgrading to Executive ($130) for the 2% cashback. You need to spend $6,500/year at Costco just to break even on the $65 upgrade. Most people don't — Costco's own data shows roughly 40% of Executive members don't earn enough rewards to justify the upgrade. But they quietly refund the difference if you ask, which is something they don't exactly advertise.
Who Should NOT Buy This
- Impulse buyers — Costco's layout is engineered to exploit you. If you can't stick to a list, you'll spend more overall
- People near a Costco-less area — If the nearest store is 30+ minutes away, factor in gas and time costs
- Minimalists — You don't need a 3-pack of ketchup. You just don't
- Anyone without a car — Getting bulk items home via public transit is a comedy sketch, not a savings strategy
Cheaper or Better Alternatives
| Alternative | Price | My Take |
|---|---|---|
| Sam's Club | $50-$110/year | Essentially Costco's twin. Slightly cheaper membership but weaker store brands |
| Walmart+ | $98/year | Better for delivery convenience, worse for in-store bulk deals |
| Aldi | Free | Cheaper unit prices on many items without a membership fee |
| Amazon Subscribe & Save | Free | 5-15% off recurring purchases, no warehouse trip needed |
| BJ's Wholesale | $55-$110/year | Accepts manufacturer coupons, which Costco doesn't |
If you're already shopping at Aldi and are disciplined about it, you might save more without paying any membership fee at all.
What Annoys Me About the Costco Cult
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The return policy creates moral hazard. Yes, you can return a half-eaten cake or a TV you've had for 11 months. But the fact that people do this is why prices aren't even lower. Everyone's subsidizing the serial returners.
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The food court quality has quietly dropped. The $1.50 hot dog combo is still the loss leader to end all loss leaders, but the pizza is cardboard now and the chicken bake recipe changed. They're cutting corners everywhere except the hot dog because they know the internet would riot.
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No bags. They give you empty boxes from the floor like you're running a moving company. In 2026, would it kill them to offer a reusable bag at checkout?
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The checkout lines. Even on a Tuesday at 2 PM, you're standing behind someone with two flatbed carts of apocalypse prep. The self-checkout machines are perpetually "temporarily unavailable."
The Membership Math Most People Get Wrong
The standard advice is "Costco saves you money on everything." It doesn't. Costco's produce, while good quality, is often only marginally cheaper than a regular grocery store's sale prices — and you have to buy way more of it. Their prepared foods and bakery items are competitively priced but are competing with your willpower, not your budget.
Where Costco genuinely massacres the competition: tires, gas, rotisserie chicken ($4.99 since 2009 — they lose $30-40 million per year on these as a loss leader), prescription drugs, and Kirkland Signature staples.
The Executive membership's 2% reward also doesn't apply to gas, which is the one category where most people save the most. Convenient.
The real question isn't "Is Costco worth it?" It's "Are you the kind of person who can walk into a warehouse full of discounted stuff and only buy what you need?" If you answered yes quickly, you're probably lying.
Final Verdict
Depends — you need to spend at least $250/month there consistently to justify even the basic membership. And you need to be honest about your impulse control.
For families with storage space and discipline, it's genuinely one of the best deals in retail. For everyone else, it's a $65/year license to overspend on things you didn't know you wanted.
If you're tempted by the Executive tier, try the basic membership first. Track your spending for 6 months. If you're consistently above $500/month, upgrade. Costco will prorate the difference.
Check out our YNAB review if you want to actually track whether Costco is saving you money — spoiler: most people who think they save don't actually measure it.
FAQ
Is the Costco Executive membership worth the upgrade?
Only if you spend over $6,500/year at Costco (about $540/month). Below that, you won't earn enough 2% rewards to cover the $65 difference. Costco will refund the gap if you ask, but nobody volunteers that information at the signup desk.
Can I shop at Costco without a membership?
You can use the pharmacy, buy alcohol (in some states), and eat at the food court (some locations) without a membership. For everything else, you need the card. You can also tag along with a member, but only they can pay.
Is Costco actually cheaper than Walmart or Amazon?
For Kirkland Signature products and gas, usually yes. For national brands, it depends on sales and coupons. Amazon's Subscribe & Save program beats Costco on delivery convenience for recurring purchases, but Costco wins on per-unit price for most household staples.