I’ve been calling myself the Costco Queen for years. No, seriously. It started as a joke among friends who watched me haul giant bags of toilet paper and rotini pasta out of my neighborhood warehouse every single week. For 14 years, I’ve been loyal to the red warehouse.
But I wasn’t always a purist.
Before I fully committed, I held a card for Sam’s Club too. My tenure was sporadic—active for a year, dormant for two—but it was enough to let me look under the hood of both giants. When I started wondering which club actually serves my family better, I didn’t just guess. I did the legwork. I scoured apps, interviewed friends, and compared the nitty-gritty details of membership fees, return policies, and even food court efficiency.
Here is the breakdown of Costco vs. Sam’s Club.
Which Membership Fee is Actually Better?
Let’s talk money upfront. Costco has two tiers. The basic Gold Star card runs $65 a year. The Executive level is $130, but it nets you a 2% reward on qualifying purchases, capped at $1,250 annually.
Sam’s Club is slightly cheaper at the entry point. A Club membership is $60 a year. Step up to Plus for $120, and you get 2% Sam’s Cash back, capped at $750 per year.
Note the cap difference carefully. $500 more in potential cash rewards at Costco.
Sam’s Club also runs occasional discounts that can slash your first-year fee by up to 55%. They even offer a free Guest Membership for online shopping, though you’ll pay a 10% surcharge to use it. No free passes for in-person pickup or shopping there.
Both clubs give you two household cards. But here is where they diverge practically. Costco requires a photo on your card. You have to stop at the membership counter for a snapshot. They are also stricter about enforcement. Show the ID, or get turned away at the scanner. Sam’s Club lets you start shopping immediately with a virtual card. You don’t need a physical photo ID to enter the app-based flow.
The Verdict: Costco wins on long-term value. The $15 upfront difference is negligible, but the $500 difference in max cash-back rewards is significant if you buy heavy.
The Return Policy: How Easy is It to Give Things Back?
Both clubs promise 100% satisfaction. If you hate your purchase, you get your money back. You can even cancel your membership for a full refund at any time.
At Costco, the bar is effectively non-existent. Bring the item and your membership card. Most things go back, no receipt needed, no questions asked. There are a few hard limits: electronics, diamonds over one carat, cigarettes, and alcohol. But for the average household purchase? It’s frictionless.
Sam’s Club asks for the original receipt. They reserve the right to limit the number of returns you make. While most items have open return windows, electronics and cell phones come with strict time limits.
The Verdict: Costco takes this one. When you’re buying $2,000 appliances in bulk, not needing a receipt is a lifesaver.
Credit Card Rewards: Cash vs. Cashback
Both clubs push their co-branded cards hard. They are essentially airline miles for groceries.
The Costco Anywhere Visa gives you 5% back on gas at Costco. 4% at EV charging stations and eligible gas stations, up to $7,000 spent per year. That maxes out around $135 a year. After that, it’s 1%. You also get 3% at restaurants and travel.
The Sam’s Club Mastercard matches that energy but with different caps. 5% back on the first $6,000 you spend at gas stations. Then 1%. 3% at dining.
For in-store purchases, it gets granular. Basic Sam’s Club members earn 1% in Sam’s Cash. Plus members earn 3%.
The Verdict: A tie. Unless you are a high-volume gas buyer who maxes out the caps, the rewards structures are nearly identical in practical application.
Store Brands: Kirkland vs. Member’s Mark
This is the bread and butter of warehouse shopping. Costco’s Kirkland Signature and Sam’s Club’s Member’s Mark are both industry leaders for value and quality.
Kirkland products are everywhere in the warehouse. Maple syrup. Trash bags. Vitamins. Baby wipes. I can’t think of a category where Kirkland doesn’t dominate.
Member’s Mark is everywhere too. But Sam’s Club tends to stock more national brands alongside its private label. Interestingly, from 2020 to 25, Sam’s Club overhauled Member’s Mark with Walmart’s push for sustainability. They cut high-fructose corn syrup and artificial flavors, focusing on responsible packaging.
The Verdict: Tie. I’ve never encountered a bad Kirkland product, and I’m rarely disappointed by Member’s Mark. If you want organic chicken or canned tomatoes, Kirkland has better visibility. If you want sustainable packaging updates, Member’s Mark is catching up fast.
Product Availability and Selection
Don’t be fooled by the massive square footage. These warehouses are tiny compared to standard supermarkets. Costco carries about 4,000 stock-keeping units (SKUs). A typical grocery store might carry 30,000. Sam’s Club doesn’t release exact numbers, but they admit they carry fewer SKUs than a standard grocer too.
So what are you actually buying?
Sam’s Club offers more variety in pre-packaged snacks and beverages. If you’re stocking up on chips or sodas for a party, they might have the specific flavor you want. Costco’s aisles are more curated. You won’t find 50 types of hot sauce, but you will find better options in gourmet cheese, deli meats, and dips.
If you have dietary restrictions, Costco is generally the better bet. Their selection of gluten-free, high-protein, and organic items is deeper. They also stock more premium national brands. Ghirardelli chocolate? At Costco, yes. At Sam’s Club? Often absent.
The Verdict: Costco wins for curated quality and organic selection. Sam’s Club wins for snack variety.
Who Has Better Prices?
I took a random sample of eight items from a popular “Best Buys” list and compared unit prices.
Sam’s Club was cheaper on four of the eight items. The margin was razor-thin in most cases—a few cents per ounce. In some instances, Costco was cheaper.
The Verdict: Sam’s Club takes it by a hair. But honestly? You shouldn’t drive 30 minutes just to save 12 cents on pasta. Pick the one closer to you.
Online Shopping and Tech Features
Both clubs have robust apps. You can order online for delivery or pickup.
Sam’s Club offers curbside pickup. Costco does not (they use third-party services for some areas, but it’s not a unified Costco-run curbside).
Here is the real game-changer: Scan & Go.
At Sam’s Club, you can scan barcodes with your phone as you shop. It adds items to your cart in real-time. When you’re done, you check out in the app. You bypass the line entirely. You just walk out under the blue arches where a staff member scans your digital receipt. Sam’s Club even puts specific discounts on yellow signs for app users only.
Costco lines are legendary. Especially on weekends. They are long. They are slow. Even with kiosks, you are standing there waiting.
The Verdict: Sam’s Club destroys this category. Scan & Go is a quality-of-life upgrade that Costco simply doesn’t offer natively.
The Food Court: $1.50 Hot Dog vs. The Competition
You haven’t lived until you’ve bought a $1.50 hot dog and soda combo at Costco. It’s an institution. Sam’s Club charges $1.38 for theirs.
Sam’s Club offers pretzels, brownie sundaes, and pizza with more topping options. Costco has the famous chicken bake, cookies, and salads, but the menu varies by location.
The efficiency difference is stark. Costco uses a kiosk ordering system now. Orders are printed and delivered promptly. Staffing seems adequate.
Sam’s Club? It’s chaotic. I once waited through multiple failed attempts to order a simple cheese pizza. I’ve seen one associate juggling orders, making the food, and taking payments all at once.
The Verdict: Costco wins on consistency. You know what you’re getting. You get it fast. The Sam’s Club food court is a gamble.
Final Thoughts
If you value cash-back rewards on gas and electronics and hate receipts, go with Costco. The 2% reward adds up faster than Sam’s Club’s capped version, and the return policy is forgiving.
If you want the cheapest possible unit price on snacks, prefer Scan & Go technology, or want to avoid long checkout lines, Sam’s Club is the pragmatic choice.
I still shop Costco most weeks. But when the Plus fee drops and Sam’s has a flash sale on groceries? I switch.
What’s your move? Are you team Kirkland or team Member’s Mark?
