The reason personalised pricing feels like a penalty

Two shoppers buy the same flight. One paid three hundred and the other paid five hundred. Neither knew the other’s price. When they discover the difference, the higher-paying shopper does not feel they received less of a discount; they feel they were charged more, and the distinction matters.

What everyone sees

Personalised pricing is presented as efficient: each buyer pays their reservation price, and the seller captures more surplus. The presentation sounds like economics, and economics sounds neutral. The buyer’s experience is not neutral: it is the experience of being judged by an algorithm and being found willing to pay more.

What is actually happening

Fehr and Schmidt modelled inequity aversion: people accept lower absolute payoffs to avoid outcomes they perceive as unfair. Xia, Monroe and Cox showed that perceived price unfairness reduces purchase intention even when the price itself is within the buyer’s range. Acquisti and Varian noted that personalised pricing may increase total welfare but decreases trust and willingness to transact. The buyer who discovers the lower price does not evaluate the flight on its merits; they evaluate the difference between their price and the other’s, and the difference is read as a penalty for being them.

Why it stays hidden

The perception hides because the firm frames the pricing as a feature: tailored prices, dynamic pricing, personalised offers. Each frame implies the buyer is receiving something designed for them, which sounds like a benefit. The buyer who discovers the disparity reframes it as surveillance — the firm knew how much I was willing to pay, and charged me that amount — which is accurate and experienced as hostile.