The paper price tag is disappearing from grocery store shelves. In its place, small digital screens called electronic shelf labels let a store change any price in seconds from a central computer, no employee walking the aisles with a pricing gun. Kroger says the switch saves labor and improves accuracy. Nearly one in four Kroger stores now runs on the technology, and Walmart plans to have it in every U.S. store by the end of 2026. The efficiency argument is real. The question worth asking is what else that same infrastructure makes possible.
What surveillance pricing actually means
Surveillance pricing, also called personalized or algorithmic pricing, means a retailer sets a different price for the same product depending on who is buying it. Not a sale, not a loyalty discount everyone can access. A price built from data about you specifically, sometimes your location, sometimes your browsing history, sometimes patterns in what you’ve bought before.
The Federal Trade Commission opened a formal study into this in July 2024, ordering eight companies to turn over records: Mastercard, JPMorgan Chase, McKinsey, Accenture, PROS, Revionics, Bloomreach, and Task Software. These are not household names, and that’s the point. They are the middlemen retailers hire to build the pricing engines, running in the background of stores you shop at every week. The FTC’s early findings showed retailers pulling in details as granular as mouse movements on a checkout page and what a shopper leaves sitting in an abandoned cart to help decide what price to show next.
How stores actually track you while you shop
The electronic shelf label is only the price-facing piece. Behind it sits a set of physical tracking tools most shoppers never notice.
Bluetooth beacons are the most established method. These are small, low-power transmitters mounted on shelves, displays, or light fixtures that detect a smartphone within a range of inches to about 150 feet. Target has used them for years to power its in-app store maps, and the same beacon network can flag exactly which aisle you’re standing in and how long you stay there. CVS, Macy’s, and Urban Outfitters run similar systems. The catch, for now, is that beacons need your phone to be running the retailer’s own app with Bluetooth turned on, so this method depends on you having installed something first.
Walmart has gone further than beacons. Shoppers started noticing small unmarked plastic boxes bolted underneath Walmart shopping carts in late 2025. Walmart confirmed the devices are MOKOSmart LoRaWAN trackers, combining GPS, Bluetooth, and Wi-Fi positioning to follow a cart’s location throughout the store in real time. This method needs no app and no phone at all. The cart itself is the tracked object, which means the store can map your path up and down every aisle regardless of what’s in your pocket.
Kroger has layered cameras on top of its shelf displays through a system called EDGE, short for Enhanced Display for Grocery Environment, already running in 500 stores with plans to expand to 2,600. Reporting on the system describes cameras built into the shelves themselves that can estimate a shopper’s age and gender and measure how long someone lingers in front of a specific product before moving on or walking away. That’s a direct extension of the demographic-detection pilot Kroger ran with Microsoft years earlier, now built into hardware already on the shelf.
Walmart is also rolling out a separate layer of inventory-tracking sensors, developed with a company called Wiliot, across its full footprint of Supercenters and Neighborhood Markets. These are billed as supply chain tools, tracking pallets and cases rather than people, but they run on the same battery-free, ambient-powered sensor technology that could just as easily be pointed at foot traffic once the infrastructure is in place.
None of these systems needs to work alone. A store running beacons, cart trackers, and shelf cameras at the same time can cross-reference all three: which aisle your cart entered, how long you stood there, what the camera estimated about you, and what you ultimately bought or put back. Any one of those signals feeds the same pricing and profiling systems described above.
Senators Elizabeth Warren, Ben Ray Luján, and Jeff Merkley, along with New York Attorney General Letitia James, have pushed Kroger and other chains directly on this. Their concern: electronic shelf labels give a store the technical ability to raise prices on basic goods based on the time of day, the weather, or a spike in local demand, the same surge pricing model rideshare apps use for a ride to the airport. Kroger has stated flatly that it does not and has never engaged in surge pricing, and one independent study of more than 180 million product-level price observations across 114 stores found no evidence of surge pricing happening in U.S. grocery retail so far.
That finding is worth taking seriously rather than waving off. It also does not settle the bigger question. The capability exists in the hardware sitting on your store’s shelves right now, whether or not it’s switched on today. Kroger also piloted a version of these shelves that paired them with camera-based demographic guessing, estimating a shopper’s age and gender to personalize the display in front of them. Public pressure led Kroger to say it has no current plans to bring facial identification to those displays, but the pilot shows what the platform is built to support.
The part that should worry you more than pricing alone
Retailers don’t need your face to build a profile of you. Purchase history alone can reveal sensitive things you never told anyone, and companies have been caught inferring pregnancy, health conditions, and financial stress from nothing more than a shopping cart. A prenatal vitamin instead of a regular multivitamin becomes a data point. Once a retailer has that kind of inference, the incentive isn’t to lower your price. Someone identified as less price-sensitive, whether that’s a new parent or a person the system tags as an infrequent bargain-hunter, becomes a target for a higher one.
Facial recognition adds a separate layer of harm on top of pricing. The FTC banned Rite Aid from using facial recognition in its stores for five years after finding the system produced false matches that disproportionately flagged Black and Asian customers as shoplifters, concentrated in stores located in communities of color. That’s not a pricing story, but it’s the same underlying pattern: a system built to identify individual shoppers, deployed with little public oversight, producing harm that falls unevenly on the people least able to contest it.
Where the law stands right now
New York passed the first law in the country directly addressing this in December 2025, the FAIR Business Practices Act. It doesn’t ban personalized algorithmic pricing. It requires a retailer using it to post a clear disclosure at the point of sale: “THIS PRICE WAS SET BY AN ALGORITHM USING YOUR PERSONAL DATA.” The National Retail Federation has already sued to challenge the law on First Amendment grounds.
Maryland went further. Governor Wes Moore signed the Protection from Predatory Pricing Act in April 2026, making Maryland the first state to ban the practice outright for large food retailers, barring stores over 15,000 square feet and delivery platforms from using personal data to raise prices on staple goods like produce, bakery items, dairy, and meat. New Jersey, Minnesota, and Oklahoma have advanced similar bills aimed specifically at grocery pricing. California Attorney General Rob Bonta opened an investigative sweep in January 2026, sending letters to retail, grocery, and hotel companies with a large online footprint. More than 70 bills addressing data-driven pricing were introduced across state legislatures in 2026 alone.
Texas has none of this. No disclosure requirement, no ban, no active investigative sweep that’s been made public. Same pattern as the Flock camera story: a technology with real capability to reshape how you’re treated as a customer, and no state-level guardrail in place while other states move on it.
What to watch for at your own grocery store
Look at whether your local store has switched to electronic shelf labels yet, and if it has, ask what data the store’s app or loyalty card program collects on you. A loyalty card tied to your phone number or email is the easiest way for a retailer to link your in-store purchase history to your online behavior, which is exactly the kind of individual profile surveillance pricing runs on. Pay attention to whether the same item’s price changes between visits with no sale or seasonal reason attached.
What you can actually do about it
Most of this tracking has a real, practical countermeasure once you know where it lives.
Bluetooth beacons only work through a retailer’s own app with Bluetooth turned on. Turn off Bluetooth before you walk in, or go into the app’s permissions and turn off location and Bluetooth access specifically. You can keep the app for coupons without it broadcasting your position through the store.
Loyalty cards and store apps tie your purchase history to your identity through your phone number or email. A physical card with no account attached, or a separate email used only for that store, breaks the link between what you buy and who you are.
Cart trackers like the ones Walmart uses have no consumer-side opt-out, since the tracker sits on the cart, not on you. There’s no setting to turn off. The only real defense is knowing it’s happening.
Shelf cameras that estimate age and gender, like Kroger’s EDGE system, also have no individual opt-out. This is the layer where public pressure has actually worked before. Kroger backed off facial identification specifically after senators and customers pushed back on it directly. Complaints to a retailer’s corporate line, and support for the state bills that require disclosure or ban the practice outright, are the tools that reach this part of the system.
For general purchase-history profiling, paying with cash breaks the clearest version of that trail when it’s practical to do so. Most states also give you some right to request the data a retailer holds on you, and in some cases to have it deleted, under laws like the CCPA in California. It’s a manual request and it varies state to state, but it’s a real right that goes unused mostly because people don’t know it exists.
None of this makes you invisible to a determined system. It does raise the cost of tracking you specifically, and it puts a little friction back into an arrangement that currently has none.