Key Takeaways
Anchoring Bias
Anchoring bias is a cognitive tendency where people rely too heavily on the first piece of information they encounter — in shopping contexts, usually the first price they see — when making decisions. That initial number acts as a mental reference point, causing all subsequent prices to feel cheap or expensive relative to it, regardless of their actual value. Because of this, a retailer who shows you a $400 item before a $150 item can make the $150 item feel like a steal, even if it's overpriced for what it is.
The effect was formally documented by psychologists Daniel Kahneman and Amos Tversky in the 1970s as part of their research on heuristics and decision-making under uncertainty. It persists even when the anchor value is arbitrary or demonstrably irrelevant.
How the Anchor Gets Set
Anchoring bias doesn't require deliberate manipulation to take hold. It kicks in automatically the moment you encounter a number in a purchasing context. Walk into an electronics store and the first thing you see is a $1,200 television. Every set you look at afterward gets mentally measured against that $1,200 — including the $600 model that, on its own merits, might represent weak value for your actual needs.
Online retail environments are constructed with the same dynamic in mind. Strikethrough pricing — showing a higher "original" price crossed out above the current price — is one of the most studied applications of anchoring in consumer research. The crossed-out figure serves no purpose except to establish a reference point that makes the selling price feel justified. Whether that original price ever reflected genuine market value is rarely verifiable by the shopper.
Anchoring also operates in negotiations and service pricing. A contractor who opens with a high estimate doesn't just set a number — they set the frame for everything that follows. A counteroffer that feels like a win may still be well above what the job is worth in your market.
Anchoring Isn't Exclusive to Price
While price anchoring is where the effect most directly costs shoppers money, anchoring influences any numerical judgment — star ratings, square footage, warranty length, or calorie counts. In purchasing decisions, be attentive to whichever number appears first or most prominently, as it is shaping your evaluation of everything that follows.
Why Your Brain Doesn't Automatically Correct for It
The mechanism behind anchoring isn't irrationality — it's efficiency. Human judgment relies heavily on reference points because evaluating every decision from scratch is cognitively expensive. When a price anchor appears, your brain uses it as a starting point and adjusts from there. The problem, documented consistently in behavioral economics research, is that the adjustment is almost always insufficient. You move away from the anchor, but not far enough.
This happens even when people are explicitly told that a number is random or irrelevant. In a widely cited experiment by Kahneman and Tversky, participants adjusted their estimates from a randomly spun number on a wheel — and still landed closer to that number than to the correct answer. Price anchors in retail are far less obviously arbitrary, which makes the pull even stronger.
~$0.65
Anchor influence on unrelated estimates
In Kahneman and Tversky's original anchoring experiments, participants' numerical estimates moved roughly $0.65 toward an arbitrary anchor for every $1.00 the anchor differed from a neutral starting point — illustrating how powerfully irrelevant numbers can skew judgment.
Significant
Effect of strikethrough pricing on purchase intent
Multiple peer-reviewed studies in consumer behavior journals have found that displaying a higher reference price alongside a sale price substantially increases purchase likelihood and perceived value, even when participants express skepticism about the original price.
It's also worth noting that anchoring interacts with other cognitive patterns. When a price follows an anchor that made it look reasonable, confirmation bias tends to help shoppers find supporting reasons to justify the purchase — reinforcing a decision that was shaped more by the anchor than by the product's objective value.
Recognizing Anchoring in Common Shopping Scenarios
Anchoring shows up across every retail format. Understanding where it tends to appear helps you flag it in the moment.
- Sale tags with crossed-out prices: The original price is the anchor. Its accuracy isn't guaranteed, and in some cases these figures have been questioned by consumer protection agencies. Always ask whether the "was" price reflects actual prior sales or simply a listed price that was rarely charged.
- Product page ordering: E-commerce platforms frequently surface higher-priced items at the top of search results, not because they're most relevant, but because they set a premium anchor that benefits the platform and sellers. See our analysis of online pricing dynamics for more context on how digital environments shape price perception.
- Bundle pricing: Showing a bundle's combined retail value before the bundle price uses anchoring to make the package feel like a bargain — regardless of whether you'd have bought those individual items separately.
- Negotiated purchases: In car dealerships and real estate, the first figure on the table anchors the entire negotiation. Whoever sets the opening number gains a structural advantage.
Practical Habits That Counteract Anchoring
Awareness helps, but it doesn't substitute for habits that actively interrupt the anchor's influence. The most effective countermeasure is arriving at a transaction with your own independent price benchmark already established.
Before shopping for any significant purchase, research what that category of item typically sells for across multiple retailers, using price-tracking tools or comparison resources. This gives you a personal anchor — one that isn't determined by the seller. When you encounter a retailer's price, you're comparing it against your own reference point rather than theirs.
Delaying the decision also helps. Stepping away from the immediate environment reduces the anchor's salience, allowing you to evaluate the price more independently. The practice of comparing prices across formats is worth building precisely because it forces engagement with multiple data points rather than a single anchor.
Additionally, question whether a "discount" reflects genuine value. Widely believed deal-timing rules often rely on the same anchoring logic — the idea that a price is good because it's lower than another price, rather than because it reflects real value. And remember that price alone doesn't capture total cost: hidden fees and add-on costs can erode any apparent savings an anchor made look attractive.
Set Your Own Anchor Before You Shop
Before visiting a retailer — in-store or online — spend a few minutes looking up what the item or category typically sells for across several sources. Write down that range. When you encounter a retailer's pricing, compare it against your benchmark, not against whatever the retailer has displayed as the 'original' or 'compare at' price. This simple step shifts the reference point back to your control.