Anchoring is the tendency to judge a value relative to whatever reference point came first, even when that reference is arbitrary. On paywalls it shows up as struck-through "regular" prices, "Save 64%" badges, yearly plans restated as a weekly amount, and tiers placed next to each other so one looks reasonable by comparison.
Amos Tversky and Daniel Kahneman (Science, 1974) showed that a number from a spun wheel (10 or 65) shifted people's estimates of the share of African countries in the UN, with median answers of 25% and 45%. Anchoring is one of the better-replicated effects in psychology: the Many Labs project (Klein et al., 2014) reproduced it strongly across 36 labs. A related price frame is John Gourville's "pennies-a-day" study (1998): restating a cost as a small daily amount made people evaluate it more favorably, because it invites comparison with trivial everyday spending.
Every price screen has an anchor whether you choose it or not. The question is whether the reference point is honest and whether it makes the saving easy to see. A weak anchor (10% off with odd cents) can make an offer feel smaller than it is.
How to use it
- Show the plan you want people to compare against first or alongside, so the recommended plan is judged relative to it.
- Express savings in a form people can feel: a dollar amount or months free for large savings, a per-week figure for small recurring charges.
- Use only real reference prices, such as the actual monthly rate multiplied out, so the anchor survives scrutiny.
Watch out
- Inflated "original" prices that nobody ever paid are deceptive and, in many markets, illegal.
- Stacking three or four price frames on one plan reads as pressure and can make users distrust all of them.
