Costco vs Sam's Club vs Walmart vs H-E-B: Which Grocery Store Wins in 2026?

Grocery inflation has cooled, but I don't know anyone who feels that at the register. The USDA's latest outlook has food-at-home prices rising about 2.4% in 2026 (RFD News on the USDA Food Price Outlook). Yet when dunnhumby surveyed shoppers, they believed food inflation was running at 19.6%, more than eight times the actual rate (dunnhumby Consumer Trends Tracker).

That gap between the data and the gut is why the "where should we shop?" debate never ends. For those of us in Texas, it usually comes down to four names: Costco, Sam's Club, Walmart and H-E-B. I wanted an answer built on numbers instead of brand loyalty, so I pulled the most recent independent studies I could find and ran the four chains through five rounds: price, membership math, quality, shopping experience and convenience.

As Matt O'Grady, President of the Americas at dunnhumby, put it: "Consumers across all income levels are feeling the squeeze" (Business Wire). So let's find out where the squeeze is lightest.

The short answer

If you only have a minute, here is where I landed:

• Lowest prices: Costco. Consumer Reports found its basket 21.4% cheaper than Walmart nationally and 18% cheaper in Dallas-Fort Worth.
• Best all-around grocery store: H-E-B. It is dunnhumby's No. 1 U.S. grocer for the fourth straight year, with prices a hair below Walmart and no membership fee.
• Best club for staples and speed: Sam's Club. It has lower fees than Costco, Scan & Go checkout and a slightly higher customer satisfaction score.
• Most convenient: Walmart. No membership, about 4,600 stores and the widest reach of any grocer in the country.
• My pick for most Texas households: H-E-B for the weekly shop, plus one warehouse club for bulk staples.

At a glance

How I compared them

I leaned on four independent data sets instead of my own receipts, because one cart on one day proves very little.

1. The Consumer Reports price study. Working with Strategic Resource Group, researchers priced baskets of packaged goods, produce and meat at 67 stores across 35 chains in six metro areas, including Dallas-Fort Worth, with Walmart as the baseline (Coupons in the News). Prices were collected in person in late summer 2025 (Supermarket News).
2. The dunnhumby Retailer Preference Index (RPI). It ranks the 81 largest U.S. grocers by blending financial results with a survey of more than 11,000 shoppers.
3. The American Customer Satisfaction Index (ACSI). It scores chains from 0 to 100 based on interviews with roughly 31,000 customers (Yahoo).
4. Company announcements and earnings calls for fees, renewal rates and store counts.

A few terms I use below, in plain English:

• Basket price index: the cost of a comparable cart, shown as a percentage above or below a baseline store.
• Unit price: the price per ounce, pound or count. It is the only fair way to compare a 4-pound club pack with a 1-pound supermarket pack.
• Private label: the store's own brand, such as Kirkland Signature or Great Value.
• EDLP (everyday low pricing): Walmart's model of steady shelf prices instead of weekly sale cycles.
• SKU (stock keeping unit): one distinct product on the shelf. Fewer SKUs means less choice but more buying power per item.

Round 1: Price

Winner: Costco

This round wasn't close. In the Consumer Reports study, Costco's basket came in 21.4% below Walmart nationally, and Costco was the cheapest chain in every one of the six metro areas tested (Supermarket News).

The Dallas-Fort Worth numbers are the ones I care about most, because that is the only metro in the study where all the Texas players show up (CultureMap Dallas via AOL):

Two things jumped out at me. First, H-E-B and Walmart are effectively tied. A 0.2% gap on a $200 cart is 40 cents. Second, the "regular" supermarkets many of us default to cost far more than either one.

What about Sam's Club? It was not part of the Consumer Reports comparison (Tasting Table), so I can't give it a clean percentage. The item-level evidence says it trades blows with Costco. In a September 2026 check of five fall staples, Sam's Club was cheaper on four. A 58-ounce Member's Mark pumpkin pie was $5.98 against $6.80 for Kirkland Signature, and 10 pounds of potatoes ran $5.12 against $6.35. Costco won only on butter, by 8 cents a pound (MoneyLion).

My read: Costco has the best-documented price lead, Sam's Club is right beside it on everyday staples, and H-E-B and Walmart are a coin flip.

Round 2: Membership fees and break-even math

Winner: H-E-B and Walmart (no fee). Among the clubs, Sam's Club.

A low shelf price only matters after the membership pays for itself. Here is what the clubs charge today:

Sam's Club raised both tiers by $10 on May 1, 2026, its first increase since 2022. A company spokesperson said the change was made to "support the things our members love" (NBC DFW). Even after the bump, Sam's Club still undercuts Costco at both tiers (FinanceBuzz).

Now the break-even math, which I ran myself from the figures above:

• Costco Gold Star: At the 18% DFW price gap, the $65 fee is covered once you move about $361 of Walmart-priced groceries to Costco. That is two decent trips.
• Costco Executive: The extra $65 pays for itself at $3,250 of annual spending, or roughly $271 a month.
• Sam's Club Plus: The extra $60 pays for itself at $3,000 a year, or $250 a month.

Costco members clearly think the fee is worth it. The company reported a 92.3% renewal rate in the U.S. and Canada at the end of fiscal 2026 (Costco Q4 2026 earnings call transcript).

Walmart and H-E-B skip this math entirely. Walmart+ costs $98 a year, but it is an optional delivery and perks program, not a ticket through the door (SlashGear).

Round 3: Quality and private labels

Winner: a tie between Costco and H-E-B

Price gets us in the door. Quality decides whether we come back.

Costco runs a deliberately small assortment. Its warehouses average about 4,000 SKUs, against the 30,000 a typical supermarket sells (The Motley Fool), and Kirkland Signature does the heavy lifting. On its first-quarter fiscal 2026 call, management said Kirkland items typically deliver 15% to 20% better value than comparable national brands (Motley Fool transcript via AOL). The company also said it used tariff refunds to cut prices on Kirkland walnuts, coffee and black pepper (Q4 2026 transcript). CEO Ron Vachris has described Costco's stance on tariffs as a "very offensive approach," and the famous loss leaders are still there: Costco sold more than 157 million rotisserie chickens in a single fiscal year (Supermarket News).

H-E-B is the rare supermarket that scores well on price and quality at once. dunnhumby credits its top ranking to a combination of savings, quality, experience and assortment, and has called the chain a "unicorn" (CultureMap Dallas). I like that its private labels are tiered: Hill Country Fare for value, the H-E-B brand for everyday items and Central Market for premium and organic.

Walmart is improving faster than its reputation suggests. dunnhumby's 2026 report says savings-focused retailers like Walmart are narrowing the quality perception gap with traditional grocers. Great Value now covers nearly 10,000 grocery and household items and is getting a redesign (Grocery Dive).

Sam's Club has a solid house brand in Member's Mark, but the data is less kind here. dunnhumby noted that Sam's Club does not rank in the first quartile for quality or for price, and it fell six places in the 2026 index (Business Wire).

Round 4: Shopping experience

Winner: H-E-B

The ACSI's 2026 supermarket results put the industry average at 78 out of 100. Here is how our four finished (ACSI):

• H-E-B: 3rd nationally, behind only Trader Joe's (86) and Publix (84)
• Sam's Club: 82, and the top-rated chain in the South with a regional score of 84
• Costco: 81
• Walmart: 75, third from the bottom of the 19 chains tracked

I was a little surprised to see Sam's Club edge out Costco. My guess is that Scan & Go explains much of it. Scanning items with your phone and skipping the checkout line removes the single most annoying part of a warehouse trip.

Walmart's score is the cost of its scale. When a chain serves that many people in that many stores, consistency suffers.

Round 5: Convenience and reach

Winner: Walmart

This is the round Walmart was built for. It operates about 4,600 U.S. stores (Allrecipes via AOL) and holds 19.9% of the U.S. grocery market, more than double Kroger or Costco (Supermarket News). dunnhumby found that a record 72% of U.S. consumers now buy groceries there, which works out to more than 190 million Americans a month. O'Grady summed up the mood behind that number: "everything aligns to saving money" (Business Wire).

Store density tells the same story locally. As of early 2026, North Texas had about 140 Walmart stores, 16 Costco warehouses and 11 H-E-B stores, with H-E-B planning at least six more (CultureMap Dallas via AOL).

The others have their own strengths:

• H-E-B runs more than 455 stores across Texas and Mexico and offers free curbside pickup on orders of $35 or more (H-E-B Newsroom).
• Sam's Club pairs Scan & Go with curbside pickup and expanded club hours.
• Costco ended fiscal 2026 with 939 warehouses worldwide, but each one is a destination trip. Bulk-only sizes and weekend crowds make it a poor fit for a quick Tuesday stop.

Who each store is best for

1. Costco is best for families of four or more, anyone with a chest freezer and shoppers who care about meat, organics and premium staples. Expect the lowest unit prices and the least flexibility.
2. Sam's Club is best for pantry staples, paper goods and shoppers who value speed. The lower fee makes it the easier club to justify for a couple or a small household.
3. Walmart is best when convenience is the priority, when you need groceries plus everything else in one stop or when a membership fee doesn't fit the budget.
4. H-E-B is best for the weekly fresh shop. You get Walmart-level prices, better-rated service and stronger store brands, with no fee.

The two-store strategy I'd use

I don't think any single chain wins outright, and the experts agree. Brian Vines of Consumer Reports offers the simplest advice I found: "Don't rely on just one store" (ClickOnDetroit).

Here is how I would split it:

• Weekly at H-E-B (or Walmart if it is closer): produce, dairy, bread and anything we will use within a few days.
• Monthly at a warehouse club: meat for the freezer, coffee, cooking oil, rice, paper goods, detergent and snacks.

A quick worked example shows why the split pays off. Take a household that spends $700 a month on groceries. Move half of that, $350 a month or $4,200 a year, from Walmart-level prices to Costco. At the 18% DFW gap, the savings come to about $756. Subtract the $65 Gold Star fee and the net is roughly $691 a year.

One warning from my own math: bulk savings only count if we eat what we buy. The USDA estimates that 30% to 40% of the U.S. food supply goes to waste (USDA). A 3-pound tub of spinach that wilts in the crisper drawer has a terrible unit price.

Final scorecard

The bottom line

If I could keep only one store, I'd keep H-E-B. It matches Walmart on price, beats it on satisfaction and quality, and has topped the dunnhumby ranking for four years running, all without a membership fee.

If I could keep two, I'd add Costco for the documented 18% to 21% price advantage on bulk items. I'd swap in Sam's Club if it were the closer club or if a household our size could not get through Costco-sized packs.

And Walmart remains the safety net. It is rarely the best at any one thing, but it is good enough at everything and it is almost always nearby.

Prices move, fees change and new stores open, so we plan to revisit these numbers when the next round of rankings lands in early 2027.