Leo and Lara are looking at the same product online. Same product, same day, same screen. $389.
Leo clicks. He moves through the checkout. By the time the card is charged, the total reads $612. Fees, options, taxes, shipping. He shrugs. He was going to buy it anyway.
Lara sees the same $389. She opens a second tab. She searches the same product somewhere else. She finds it for $510 with everything included. Same product. $102 less. She buys from the second site.
Same screen. Same starting price. Leo paid $612. Lara paid $510. The difference was two minutes in a second tab.
Our minds lock onto the first number we see and judge every number after it against that anchor, even when the first number was never the real price. Leo is not careless. His brain simply saved energy by treating the first price as the reference, the way all our brains do when a number arrives before we have one of our own. This behaviour has a name: Anchoring.
Two minutes in a second tab is the entire skill. One search of the same product on another site. One quick scan of the final total at checkout, not the headline at the top. Leo paid $612 because his brain only saw $389. Lara paid $510 because her brain saw two numbers and chose between them.
TL;DR
- Situation: You see something online at a price that feels right. You click. By the time you finish checkout, the final total is much higher than the price that pulled you in.
- What your mind does: It locks onto the first number it saw and treats every number after it as relative to that anchor (this is called Anchoring, see below).
- Consequence: The first price is rarely the final price. The gap between headline and total can run 20 to 60 percent on a typical online purchase with fees and extras.
- What to do: Open a second tab. Search the same item somewhere else. Compare final totals, not headline prices.
What to do
- Before clicking buy, open a second tab. Search the same product on a different site. Two minutes is enough.
- Look at the final total at checkout, not the price at the top of the page. The first number is rarely the full price.
- For any purchase above $100, give yourself a 24-hour pause. The anchor weakens overnight.
- When a discount appears late in checkout, ask if it is real or just bringing the number back down to where it should have started.
What not to do
- Do not anchor on the first headline price. It was chosen to be the first thing you see, not the right thing to pay.
- Do not assume the strikethrough price was ever the real price. A line through a number is a design choice, not a record.
- Do not finish checkout without checking the total. The pull to "just finish it" is the anchor doing its job.
The first price is not the price. It is the number your brain agreed to before you knew what you were buying.
Want to understand why this happens?
Anchoring is the brain's habit of locking onto the first number it sees and using it as the reference point for every number that follows.
Researchers ran an experiment where people were shown a random number between 1 and 100 before being asked to estimate something completely unrelated, like the percentage of African countries in the United Nations. The higher the random number people saw first, the higher their estimate. The number had nothing to do with the question. The brain anchored to it anyway.
It is not you. It is how every human brain handles numbers under any kind of pressure or speed.
Online checkouts are anchoring at industrial scale. The headline price is the anchor. The fees, taxes, options and shipping that arrive later look small next to it, even when they add up to a third of the total. The fix is not to distrust every price. It is to bring your own number into the room by searching the same product somewhere else before deciding the first price was good.
"The brain weighs the first number it sees more than the numbers that follow, even when the first number was random." — Dan Ariely (paraphrased from Predictably Irrational, 2008, chapter on arbitrary coherence and anchoring)
This is called Anchoring. Dan Ariely, Predictably Irrational (2008).
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