Generally, stores do not have to honor price mistakes. A price on a shelf tag, in a flyer, or on a product page is treated in U.S. contract law as an invitation for you to make an offer, not as a binding promise to sell. The cashier or the retailer’s shipping system decides whether to accept that offer, which means an obvious misprice can be caught and corrected before the sale is final. Once the sale is complete, your position improves. And separate rules kick in when the “mistake” looks less like a typo and more like bait.
Why a Price Tag Isn’t a Binding Offer
The reason a store can walk back a wrong price comes down to how contracts form. Displaying a price is not the same as agreeing to sell at that price. You make the offer when you bring the item to the register or click “place order.” The store accepts by taking your payment and handing over the goods.
So if a $1,500 television is accidentally tagged at $150, the tag alone doesn’t create an obligation. The store can decline your offer at $150, correct the price, and put the set back on the shelf at $1,500. Most pricing disputes end right there, before any money changes hands.
When the Sale Becomes Final
The practical question is what counts as the sale actually going through. Once it has, the store has a much harder time clawing back the difference.
In a Physical Store
A contract forms the moment the cashier accepts your payment and hands you a receipt. You’ve paid, the store has transferred the goods, and both sides have performed. If the register rang up a wrong price and the cashier processed it, the sale is generally binding. The store gave up its chance to reject your offer by completing the transaction. In practice, no store is going to chase you into the parking lot for a scanning error, and retroactively charging your card for the difference would raise its own consumer-protection problems.
Online Purchases
Online, the moment of acceptance is harder to pin down. Clicking “place order” is your offer. The confirmation email that arrives seconds later is usually just an acknowledgment that the retailer received it. Most large online retailers spell out in their terms of service that a binding contract doesn’t form until the item actually ships, or until a separate shipment confirmation is sent. That gap is why you sometimes get an email saying the order has been canceled due to a pricing error. The retailer is exercising a right it reserved in the fine print.
If you want to know exactly where a particular retailer draws the line, look at its terms of service. Almost every major online seller explicitly reserves the right to cancel orders with pricing errors before shipment.
When a Mistake Is Too Obvious to Enforce
Even when a transaction technically completes, contract law has a safety valve for extreme errors. Under the doctrine of unilateral mistake, a contract can be voided if the mistake concerned a basic assumption of the deal, enforcement would be deeply unfair, and the other party had reason to know something was wrong. The Restatement (Second) of Contracts, which courts across the country rely on, says a contract is voidable when one party’s mistake has a material effect on the exchange and the other party “had reason to know of the mistake or his fault caused the mistake.”
In plain terms: if a price is so wildly wrong that any reasonable person would realize it’s an error, you probably can’t enforce the deal. A $2,000 laptop listed for $2 is not a lucky find. Courts look at the size of the discrepancy, whether other prices in the market made the error apparent, and whether the buyer tried to exploit it by, say, ordering 500 units. The bigger and more obvious the gap between the listed price and the real value, the stronger the store’s argument that no enforceable contract was formed.
When You’ve Been Overcharged Instead
The reverse situation, where the register rings up more than the shelf price, is treated more favorably to the buyer. Federal and state rules focus heavily on price accuracy at the point of sale.
National Price Accuracy Guidelines
The National Institute of Standards and Technology publishes examination procedures for price verification that many states adopt. Under these guidelines, a store must maintain a price accuracy rate of 98% or higher on inspected items to pass a compliance check. An overcharge occurs whenever you are charged more than the lowest advertised, posted, or marked price for an item.1National Institute of Standards and Technology. Examination Procedure for Price Verification Stores that fall below 98% face increased inspection frequency and potential enforcement from state weights and measures agencies.
Inspectors are told not to count every discrepancy as a violation. If a price label has obviously fallen off a shelf, or if a customer moved a product or its label to another location, those situations aren’t treated the same as a store-caused pricing error.1National Institute of Standards and Technology. Examination Procedure for Price Verification
State Scanner Error Laws
Several states go further and give consumers a direct remedy when the register charges more than the displayed price. These scanner error or item pricing laws vary widely, but the general idea is that if you’re overcharged because of a scanning error, the store owes you more than the price difference. Depending on the state, the remedy can range from a refund of the overcharge up to a multiple of the difference, often with a minimum guaranteed payout. Some states set the bonus at a fixed dollar amount; others use a multiplier. Because these laws differ so much, check with your state attorney general’s office or consumer protection agency for the specific rules where you shop.
One boundary is worth knowing: these laws typically apply after you’ve already paid too much. They don’t generally force a store to sell you something at a misprinted price before checkout.
Bait-and-Switch and Deceptive Pricing
Where the law comes down hard is on stores that use low prices as bait, with no intention of actually selling at that price. The Federal Trade Commission’s Guides Against Bait Advertising define bait advertising as “an alluring but insincere offer to sell a product or service which the advertiser in truth does not intend or want to sell,” designed to lure shoppers in and push them toward something pricier.2eCFR. 16 CFR Part 238 – Guides Against Bait Advertising
The FTC looks at specific behaviors to distinguish bait-and-switch from a genuine mistake. Red flags include refusing to show or sell the advertised product, bad-mouthing the advertised item to steer you toward a pricier one, failing to stock enough units to meet reasonable demand without disclosing limited availability, and refusing to take orders for the advertised product.2eCFR. 16 CFR Part 238 – Guides Against Bait Advertising A single honest typo on a price tag doesn’t qualify. A pattern of “mistakes” that always seem to draw customers in and end with them buying something more expensive could.
Deceptive Price Comparisons
Related FTC rules address a subtler form of pricing deception: fake sale prices. Under the Guides Against Deceptive Pricing, a “was/now” comparison is legitimate only if the former price was the actual price at which the item was offered on a regular basis for a reasonably substantial period of time. A store that inflates a “regular” price just to make the “sale” price look like a bargain is engaging in deceptive pricing, even if the sale price itself is accurate.3eCFR. 16 CFR Part 233 – Guides Against Deceptive Pricing
Advertised Sale Items That Aren’t in Stock
A related situation arises when a store advertises a product at a sale price but has none in stock when you arrive. The FTC’s Retail Food Store Advertising and Marketing Practices Rule requires food retailers to have advertised items available at or below the advertised price. If an item is out of stock, offering a rain check, a written guarantee to sell the item at the advertised price once it’s restocked, is one of the defenses a store can use to stay in compliance. The rain check must provide compensation equal to the advertised savings, and one that expires before the store restocks doesn’t count.4Federal Register. Retail Food Store Advertising and Marketing Practices Rule
This rule is narrower than it sounds. It applies specifically to retail food stores and advertised sale prices, not to every pricing error at every type of retailer. If your grocery store runs a weekly flyer with chicken at $1.99 per pound and has none when you arrive, the store should either provide a rain check or fall back on another valid compliance defense.
What to Do When the Price Doesn’t Match
Your approach should depend on whether you’ve already paid.
Before Checkout
If an item rings up higher than the shelf price, point out the discrepancy politely. A photo of the shelf tag on your phone is far more persuasive than your memory. If the cashier can’t adjust the price, ask for a manager. Managers have discretion to honor the lower price, especially for small differences, and many stores have internal policies to do exactly that as a customer-service gesture. Some retailers will honor any shelf-tag price up to a certain dollar amount; others offer a percentage discount on the correct price as a compromise. You’re more likely to get a favorable outcome by framing the conversation as a request rather than a legal demand.
After Checkout
If you’ve already paid and realize you were overcharged, take your receipt and evidence of the lower displayed price back to the customer service desk. In states with scanner error laws, you may be entitled to more than just a refund of the difference. Even where there’s no specific scanner law, most stores will correct a clear overcharge rather than risk a formal complaint.
If overcharges keep happening at the same store, or a retailer refuses to address a legitimate complaint, you can file with your state attorney general’s office or the consumer protection division of your state government. The FTC also accepts complaints at ftc.gov, particularly if you suspect the pricing pattern is intentionally deceptive rather than accidental.
The Role of Store Policies
None of the legal principles above prevent a store from voluntarily honoring a price mistake. Many retailers have internal policies for exactly these situations, and those policies tend to be more generous than the law requires. Some stores will honor any mispriced item below a certain dollar threshold without question. Others use pricing errors as an opportunity to offer a goodwill discount. These are business decisions, not legal obligations, and they vary by retailer and even by manager.
The practical takeaway is that your best leverage is usually politeness and the store’s interest in keeping you as a customer, not a legal argument. Most cashiers and managers would rather give you a small discount than watch you leave angry. But if a store lists a $1,500 item for $15, expecting them to absorb that loss because of a decimal point is unrealistic, and the law agrees.