You walk into a furniture store. The first sofa you see is £3,500. You eventually buy a different sofa for £1,800, and you feel like you got a bargain. You probably didn’t. But the first number made sure you felt that way.
This is price anchoring — one of the most well-documented and stubbornly persistent effects in behavioural economics. The principle is simple: the first numerical value you encounter in a decision acts as a psychological anchor. Every subsequent number is evaluated relative to it, not on its own terms.
The anchor doesn’t have to be realistic, relevant, or even intentional. In classic experiments, participants asked to estimate the population of a city would give wildly different answers depending on whether they had recently seen a high or low number — even a random one, like a spinning wheel. The irrelevant number still dragged their estimates toward it.
Retailers have understood this for decades. A jacket originally priced at £400, now marked down to £220, doesn’t need to have been genuinely worth £400. The original price exists only to make £220 feel like a deal. The crossed-out number is doing all the emotional work.
Anchoring also works upward. When a salesperson opens a negotiation with an outrageous number, it shifts the entire range of what feels reasonable. The buyer who haggles them down to something merely expensive often walks away satisfied, having started the negotiation from a rigged position.
The effect is surprisingly hard to shake even when you know about it. Awareness reduces the bias somewhat, but not reliably. What does help is deliberate re-anchoring: before entering a negotiation or purchase decision, decide independently what the item is worth to you. Write it down if it helps. That number becomes your anchor, not theirs.
Comparison shopping disrupts anchors too, but only if you start from a neutral position rather than using the first price as the benchmark. Looking up prices before you see the displayed one — rather than after — puts you in a more defensible position.
The other useful move is simply pausing. Anchors are most powerful in the moment of first encounter. A day between seeing the first price and making the decision gives your independent judgment a chance to reassert itself.
None of this eliminates the bias. Our brains are wired to use the first number as a reference point, and that wiring doesn’t come with an off switch. But knowing the mechanism is the difference between walking out of a furniture store feeling like you beat the house and knowing you were playing in their casino all along.
The first number you see is rarely neutral. It’s usually a deliberate move. Knowing that doesn’t mean you can ignore it — but it does mean you can watch for it.
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Worth considering
Predictably Irrational by Dan Ariely — the clearest popular account of how hidden forces (including anchoring) shape financial decisions. Ariely’s experiments are surprising enough to stick with you the next time you see a crossed-out price.
Thinking, Fast and Slow by Daniel Kahneman — broader and deeper, covering the full range of cognitive biases that affect judgment and spending. Anchoring gets its own chapter, laid out without jargon.
