NYC, New York – Shoppers can save more than 20 percent on groceries by choosing warehouse clubs over traditional supermarkets, according to new research commissioned by Consumer Reports.
The Strategic Resource Group analyzed grocery prices at major chains in six metropolitan areas representing different U.S. regions during late summer 2025.
Using Walmart as the comparison point, Costco offered the lowest prices at 21.4 percent below Walmart. BJ’s Wholesale Club came in second at 21 percent below Walmart.
Discount chains Lidl and Aldi both undercut Walmart by about 8 percent, while WinCo was 3.3 percent cheaper.
Whole Foods charged the highest prices in the study at nearly 40 percent above Walmart. Shaw’s, El Rancho, and Jewel-Osco all exceeded Walmart prices by more than 30 percent.
Mid-range chains showed varying results. Kroger was 15 percent above Walmart, Target was 6 percent higher, and Trader Joe’s was 25 percent above the baseline.
Researchers compared identical items across stores, including packaged goods, meat, and produce. Sale prices and loyalty card discounts were included, but manufacturer coupons and app-only deals were excluded.
The widest price gap between the cheapest and most expensive stores in each city exceeded 33 percent.
Whole Foods responded after publication that the study did not consider their quality standards or ingredient sourcing. The company stated it has lowered prices on one-quarter of store items over 18 months and offers Prime member discounts.
