Stamp card
Updated September 30, 2026
In one sentence
A stamp card rewards repeat visits: the customer gets one stamp per purchase and earns a reward when the last box is filled.
Why it works
It is the easiest program to understand: no maths, a reward named up front, progress visible at a glance. The closer the card gets to the end, the more the customer wants to finish it; researchers call this the goal-gradient effect.
The settings that matter
Three choices make a card work: the number of boxes, the reward, and the stamps given at the start. A card that is too long gets abandoned; a good customer should be able to fill it in eight weeks or less. The reward should be appealing and clear, like a free coffee or haircut, rather than a percentage off. On a digital card, the stamp is added when the customer’s code is scanned, and the business sees how many cards are in progress.
A café offers a 10-box card, with the eleventh coffee free. A regular who comes every other day fills it in about three weeks.
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