Pick the mechanic first
Most coffee shops under ~500 cups/day do best with a 10-stamp "every 10th coffee free" card. The mechanic is dead simple, the reward is tangible, the redemption math is easy to communicate at the till, and the program can be run on paper or in a wallet pass. Points and tiers win above that volume or when the business also sells retail, beans or food.
Below ~200 cups/day, paper is genuinely fine. Above that, a digital pass becomes worth it because the redemption-loss rate on paper cards (cards lost in pockets, washed in jeans, left at home) eats 20–35% of redemptions.
- Under 200 cups/day → paper stamp card or wallet pass with simple 10th-free mechanic.
- 200–800 cups/day → digital wallet pass is the default; paper as a backup.
- Above 800 cups/day, multi-location, or with subscription-style products (beans, milk) → points program with simple tiers.