How many stamps should your card have?
Enter how often a good customer comes back: the calculator tells you how many weeks the card takes to fill, and how many boxes to aim for to stay under 8 weeks.
days
Think of a regular, not a one-off visitor.
stamps
The reward counts as the last box.
free
0, 1 or 2: the welcome stamp.
ExampleThe starting values are an example. Replace them with yours.
Weeks to fill the card
9weeks
The card may run out of steam. Remove boxes or give one more free stamp.
To stay under 8 weeks: 9 stamps at most on the card.
The formula
Weeks = (days between visits × stamps to earn) ÷ 7, where stamps to earn are the card’s stamps minus the free ones.
The assumptions
- The 8-week mark is a practical rule of thumb, not a scientific one: beyond 16 weeks, the card hardly motivates anyone.
- The calculation assumes one stamp per visit. If you give a stamp per spending step, count the visits that earn one.
- In Nunes and Drèze’s car wash study (2006), cards that started with 2 free stamps were completed more often: 34% against 19%.
See your business’s card
Send us your logo: we prepare a preview of your card and show it to you on video.