Lesson 1.3 · FoundationsGuide · 7 min readFree · No signup

Anchoring Bias: why the first number wins

Part of the Psychology of Design learning path. The cognitive biases and psychology principles behind every click, scroll, and conversion.

L1 · How people see · Lesson 3 of 307 min read for this one

What you'll understand by the end of this lesson

  • Why the first number someone sees shapes every number they see after it
  • How anchoring works on pricing pages, product listings, and CTAs
  • How to audit whether your pricing page anchor is working for you or against you

The principle in plain English

The first piece of information a person encounters becomes their reference point.

Every piece of information that follows gets judged relative to that anchor — not on its own terms.

This is Anchoring Bias. And it works whether the anchor is accurate, relevant, or even intentional.


A simple example

You're shown a jacket priced at £500. Then a second jacket at £200.

The £200 jacket feels like a deal.

Now imagine you saw the £200 jacket first, with no context. It's just £200. You'd evaluate it differently — against your general sense of what jackets cost, not against a £500 anchor.

Same jacket. Same price. Completely different feeling.

The anchor changed the evaluation — not the product.


Where it shows up on websites

Pricing pages

The order you display your plans matters more than most teams realise.

Show the cheapest plan first and visitors anchor low. Your mid-tier suddenly feels expensive relative to the anchor they set in the first few seconds.

Show the most expensive plan first and the tiers below it feel like value — even if the price hasn't changed.

Most SaaS companies don't think of this as anchoring. But their pricing pages are running the experiment whether they know it or not.

Crossed-out prices

"Was £99, now £49" works because £99 is the anchor.

The visitor evaluates £49 against it — not against what a competitor charges, not against what they'd willingly pay. Just against the crossed-out number.

It doesn't matter that nobody bought it at £99. The anchor still does its job.

Salary and negotiation

Whoever names a number first sets the anchor.

In a pricing conversation, negotiation, or proposal: the first number floated becomes the reference point for everything that follows. This is why experienced negotiators are careful about who speaks first.

On a pricing page, the "recommended" badge does double duty: it draws the eye first (creating the anchor) and signals the socially approved choice. Most visitors never consciously evaluate the other plans — they just check whether the recommended one fits.


The CRO audit

Look at your pricing page and ask two questions:

1. What does the visitor's eye land on first?

That's your current anchor. It might be intentional. It might be accidental. Either way, every other price is being judged against it.

2. Does that anchor make the plan you want to sell feel like value — or feel expensive?

If your most popular plan is shown after a cheaper one, the anchor is working against you. Move the order, add a visual emphasis to the plan you want to sell first, or use a "most popular" badge to draw the eye there before visitors read the prices.

Anchoring is not manipulation — it is an unavoidable feature of how the brain processes numbers. Your pricing page already has an anchor. The only question is whether you designed it deliberately or left it to chance.


The connection to Cognitive Load

Anchoring reduces the cognitive work of evaluating a price.

Instead of thinking "is £99/month objectively reasonable for this product?" — a genuinely hard question — the brain takes a shortcut: "is £99 higher or lower than the first number I saw?"

That shortcut is much easier to answer. The anchor provides a frame so the brain doesn't have to build one from scratch.

This is why anchoring is so powerful: it doesn't just influence decisions, it simplifies them.



Q1

A SaaS pricing page shows: Starter £19 — Pro £49 — Business £99. Fewer people buy Pro than expected. What's the most likely anchoring issue?

Think about this

Anchoring shapes how visitors judge a single number. But what about when you want to guide someone through a whole decision — step by step?