Identical Groceries, Same Store, and Different Prices
A months-long investigation by Consumer Reports, Groundwork Collaborative and More Perfect Union uncovered a quiet corporate practice that affects millions of families. Researchers asked more than 400 volunteers in multiple cities to shop for the exact same groceries through Instacart at the same time from the same stores. What they found revealed a pattern of unpredictable and unfair pricing that could cost a typical household as much as twelve hundred dollars per year.
Same Groceries, Same Store, Same Moment, Different Prices
Volunteers loaded identical items into their carts. Despite choosing the same stores and the same brands, prices varied widely from shopper to shopper. Nearly three quarters of the products tested showed different prices for different people. Some items differed by only a few cents, but others jumped as high as twenty percent or more. A carton of eggs, for example, appeared at several different prices for volunteers shopping from the same physical store at the same moment. When total baskets were compared, the cost differences reached an average of seven percent.
How the Pricing Experiments Work
Investigators found that Instacart’s pricing system uses algorithmic tools designed to test how much different shoppers will pay. These tools were introduced after Instacart acquired a specialized pricing software company. The system quietly runs experiments on customers without notifying them. Two shoppers can look at the same product in the same store and see completely different prices. In some cases, the company did not change the sale price but altered the so-called original price to make a discount appear larger for some shoppers than others. This tactic creates the impression of savings even when no real discount exists.
Why This System Is So Troubling
Most customers assume online grocery prices follow the same rules as physical store shelves. Instead, families are being placed into randomized tests with no disclosure. The investigation found no evidence that personal data like income or demographics were used to set prices, but the randomness alone still creates unpredictable and inequitable outcomes. For households already strained by rising food costs, these experiments mean they may be paying significantly more for essential items without any warning or explanation.
The Larger Impact on Food Affordability
Food costs in the United States have risen sharply in recent years, placing enormous pressure on working families. Algorithm-driven price experiments add another layer of financial strain during a period when budgets are already stretched. Investigators argue that groceries are not a luxury and should not be manipulated through opaque testing systems. Advocates are calling for state and federal regulators to examine whether undisclosed price experimentation on essential goods violates consumer protection laws.
What Shoppers Can Do Right Now
Consumers should be aware that the prices they see online may not match the prices other shoppers see. When possible, comparing online prices with physical stores can reveal whether costs are inflated. Consumer protection groups are pushing for stronger rules requiring full transparency whenever pricing is influenced by algorithms. The goal is simple: families deserve to know when they are part of an experiment and deserve a fair and consistent price for basic necessities.
