How Many Stamps Should a Loyalty Card Have?

Ask ten business owners how many stamps their loyalty card requires and most answers will land somewhere between six and ten. That's not a coincidence — it's the range where a card feels earned without feeling out of reach, and it holds regardless of whether the card is paper or, as covered in digital stamp cards, living in a customer's Apple Wallet or Google Wallet. The number matters more than it looks like it should: set it too high and customers abandon the card before the first reward; set it too low and the reward stops meaning anything. Here's the reasoning behind the range, and how to adjust it for your own business.

The short answer: six to ten

Six to ten stamps is the number that keeps showing up across cafés, bakeries, barbershops and salons running a stamp-based card, and it isn't arbitrary. Below six, the reward arrives so quickly it barely registers as an achievement — customers redeem and forget almost immediately. Above ten, the finish line moves far enough away that a portion of customers stop believing they'll ever get there, especially if visits are infrequent to begin with. Within that band, a card feels like a real goal without feeling like a chore. Dedicated stamp-card platforms converge on a similar range too — see how Pikarta compares with StampCard for how a stamps-first alternative sets its defaults.

The arithmetic behind the number (worked example)

Say your average ticket is €4 and the reward you're planning to give away — a free coffee — costs you €1.20 to make. At 8 stamps, a customer needs to spend roughly €32 before they redeem, and the €1.20 reward costs you about 3.75% of that revenue — a manageable cost for the repeat visits it took to get there. Drop to 4 stamps and the same reward costs you 7.5% of revenue; drop to 2 stamps and it's 15%, which starts looking less like a loyalty incentive and more like a standing discount on every other visit.

Run the same check the other way: at 20 stamps, the reward costs a much smaller share of revenue, which sounds efficient until you account for how many customers realistically visit 20 times before giving up on tracking a card at all. The number that keeps the cost-per-visit reasonable and the finish line visible is usually the same number — which is why six to ten shows up so often.

Starting points by business type

Visit frequency is the biggest variable — a business customers visit twice a week can ask for more stamps than one they visit twice a month, because the finish line arrives in roughly the same number of weeks either way.

Treat these as starting points, not fixed rules — a barbershop with a strong Saturday crowd might comfortably run 8, and a café with mostly one-off tourist traffic might do better at 6. The count should track how often your specific customers actually come back, not a category average.

Signs your stamp count is wrong

• Cards sit unfinished for months. If most customers stall partway through and never come back to finish, the count is likely too high for how often they actually visit.
• Rewards redeem almost immediately. If regulars clear the card within a week or two of joining, the count is too low to function as a retention tool.
• New customers never scan the QR code at all. That's less about the number and more a sign the reward itself isn't compelling enough to bother joining for.

Changing the number after launch

The stamp count isn't a one-time decision — it's a setting you can revisit once you can see how customers are actually behaving. Adjust it in the app and the new rule applies going forward. Customers already partway through a card keep the stamps they earned under the old rule and continue toward the new target, so nobody loses progress when you tune the number. If a batch of customers is stalling around stamp six on an eight-stamp card, that's a strong signal to try seven, or to make the reward a little more compelling instead.

The reward matters as much as the count

A well-tuned stamp count paired with a weak reward still fails. The reward should be worth roughly one average purchase — a free coffee at a café, a free cut at a barbershop — not a token gesture and not something so large it erodes the margin on every cardholder who finishes. Compare this against your own numbers using the same arithmetic above: divide the reward's cost by the revenue a full card represents, and check that the percentage still looks sane. If you're deciding between a stamp card and one of the other three mechanics for a business where ticket size varies more than a café's, see stamps, points, cashback or discount for the fuller comparison, or see how Pikarta's stamp cards compare with a dedicated app like Stamp Me on the comparison page.