The Anchor Effect

The first number can shape later judgments.

01 / UNDERSTAND

The idea

An initial value can become a reference point for evaluating later information. In design, prices, estimates and prefilled amounts may act as anchors. Make comparisons relevant and explain the basis of estimates.

An initial number or comparison can become the reference for later judgments. A sale price can feel different beside a high crossed-out price even when the amount paid is unchanged. Consider what people see first and whether comparisons are relevant. Reference prices and forecasts must not misrepresent the real choice.

02 / RECOGNISE

See it in real products.

Examples of how the principle can appear in an interface.

HopperEXAMPLE 01

Provide a forward-looking reference

Hopper shows predicted price changes over time. That forecast gives context for today’s fare, but its uncertainty and assumptions remain important.

Hopper · Interface example
AirbnbEXAMPLE 02

Revisit the comparison at commitment

Airbnb’s final checkout example reminds the guest of the value comparison. A useful reminder should make the basis of the claim clear rather than merely declaring a bargain.

Airbnb · Interface example
Pricing tiersEXAMPLE 03

The first price becomes a reference point

A premium pricing tier provides a concrete example of how the first number seen can influence the interpretation of other prices.

Example source

03 / CONNECT

Why it matters.

Initial information can shape later price comparisons and perceived value. Explain the basis of a reference point and avoid invented discounts or unjustified estimates.

Possible influences to investigate, rather than guaranteed outcomes for every product.

04 / APPLY

Put it into practice.

  1. 01

    Use relevant comparisons

  2. 02

    Explain estimate assumptions

  3. 03

    Allow independent user input

05 / EXPLORE WITH UPSLIDE

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Use a practical guide, read a deeper explanation.

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Reviewed by the Upslide team.