How many stamps until reward? The right mechanics
How many stamps until reward? The short answer: between 5 and 10, depending on how often a typical customer visits you. The card should fill up after four to eight weeks for frequent visits, or within six months for rare appointments at the latest. Why that's the case, how to figure out the right number for your industry, and which mistakes most shops make—you'll find concrete sample calculations in this article.
The rule of thumb: visit frequency times time window
The stamp count doesn't come from guesswork, but from two questions:
- How often does a good regular customer visit? Not your best customer, but a normal, loyal one.
- In what timeframe should they be rewarded? For frequent visits, about four to eight weeks; for rare appointments, up to six months.
Multiply visits per week by the weeks in your time window, and you have a stamp count. A café customer with two visits per week and a five-week window lands at 10 stamps. A barber customer with one visit every five weeks and a six-month window lands at 5.
The reason for the time window is psychological: a reward that lies far in the future doesn't motivate. The customer needs to see the goal, or they won't even start. More on this in The psychology of loyalty programs.
Recommended stamp counts by industry
The following table summarizes typical values. They're starting points, not rules; your numbers may vary depending on price level and customer base.
| Industry | Visit frequency | Recommended stamps | Card full after about | Typical reward |
|---|---|---|---|---|
| Café, coffee bar | 2 to 4 times per week | 10 | 4 to 5 weeks | One free coffee |
| Bakery | 2 to 3 times per week | 8 | 3 to 4 weeks | One free pastry |
| Snack bar, kebab shop | 1 to 2 times per week | 8 | 6 to 8 weeks | One free meal |
| Lunch counter | 2 to 3 times per week | 10 | 4 weeks | One free lunch |
| Barber, barbershop | every 4 to 6 weeks | 5 | 6 months | Discount or extra service |
| Nail studio | every 3 to 4 weeks | 6 | 5 months | One discounted treatment |
| Beauty studio | every 4 weeks | 5 to 6 | 5 to 6 months | Extra treatment |
| Car wash | every 2 to 3 weeks | 8 to 10 | 5 months | One free wash |
| Boutique, retail | irregular | 5 to 6 | six months | Voucher |
| Ice cream shop (seasonal) | 1 to 2 times per week | 6 to 8 | 5 to 6 weeks | One scoop or cup |
With stampa, the 143 industry templates come with appropriate values already built in, which you can adopt or adjust when creating your card.
Sample calculations: stamp count and reward together
The stamp count can't be viewed separately from the reward. Together, they determine what the customer gets and what it costs you.
Café: 10 stamps, one free cappuccino. Ten coffees at €3.50 each are €35 in sales. The free coffee costs about €0.80 in materials. The customer gets a meaningful value, and you give up a small portion of the sales you've generated.
Barber: 5 stamps, €10 discount. Five haircuts at €28 each are €140. The discount is €10. One fewer stamp, so 4, would fill the card after five months, but would be too generous for a €10 discount. One more stamp, so 6, stretches it over seven months, which is at the limit for a men's barber.
Boutique: 5 stamps on purchases of €30 or more, €15 voucher. At least €150 in sales, €15 reward. The minimum purchase per stamp prevents a sock purchase from earning a stamp.
Bakery: 8 stamps, one free croissant. Eight purchases at an average of €4 each are €32. The croissant costs well under €1 in materials. The card fills up after three to four weeks, which matches a bakery's rhythm.
Which type of reward works best for which industry is compared in Choosing the right reward for your loyalty program.
Common mistakes with stamp counts
Most stamp cards fail not because of the idea, but because of the number. These are the mistakes you see most often:
- Too many stamps. 15 or 20 stamps for a coffee. The reward is so far away that the customer doesn't take the card seriously. Fewer stamps with a smaller reward work better than many stamps with a large one.
- Too few stamps. 3 stamps for a free coffee sounds generous, but it costs you the material cost on every fourth coffee, and the customer hasn't really bonded with you.
- Stamp count without considering visit frequency. 10 stamps at a beauty studio means almost a year. Hardly anyone experiences that to the end.
- Conditions that extend the count. "One stamp per day, only on purchases over €5, not in combination with promotions." Every condition makes the card feel longer.
- Never adjusting. The first number is an assumption. Without review, it stays forever, even if it doesn't work.
The starting stamp: worth it or not?
A well-known effect from behavioral research: people who see they've already started are more likely to continue than those starting from zero. Some shops give a free stamp when the card is created.
This can work, but there's a trap: if you want 10 stamps and give one away, you really have a 9-stamp card. So count the starting stamp toward your total. An 11-stamp card with a starting stamp equals a 10-stamp card without one. With stampa, the card starts at zero by default, so every stamp counts for a real visit and your analytics stay clean.
How to find and test the right number
The simplest approach has three steps:
- Start with the rule of thumb. Visit frequency times time window, rounded to a clean number. When in doubt, go with the smaller one.
- Run it for four to eight weeks. With a digital stamp card, you see in the dashboard how many cards are active, how many customers return, and how many rewards are redeemed.
- Adjust. If few cards fill up, the number is too high. If they fill very quickly and customers don't visit more often, the number is too low or the reward isn't the right incentive.
With a paper card, you have no data for step 2. With a Wallet card, you can change the stamp count in the dashboard, existing cards are adjusted fairly, and after a few weeks you see if the new number works better. For step-by-step instructions on setting up your entire program, see Creating a loyalty program for small shops.
Conclusion
How many stamps until reward? As many as a normal regular customer collects in four to eight weeks, or at most six months for rare appointments. For most shops, that's 5 to 10 stamps, combined with a reward that means something to the customer and only costs you the material expense. The first number is an assumption you should test. With stampa, you see in the dashboard whether it works, and you can start for free, up to 100 active customers and without a credit card.