Loyalty programmes genuinely work. Repeat customers spend more, visit more often, and are far cheaper to retain than attracting new ones. The problem with physical stamp cards isn't the concept — it's the execution. They get lost, forgotten in the bottom of a bag, or left at home on the one visit when you'd have earned a stamp. A digital stamp card solves all of that. This guide covers how to plan one that works — and how the stamp card built into Octopus Menu handles each step.
Good to know: Octopus Menu includes a digital stamp card on the Essential and Growth plans. The thinking below applies to any digital stamp card, and it's how ours works.
Why digital is better than paper
A paper stamp card lives in a wallet. A digital one lives on a phone. Most people in the UK check their phone 80–100 times a day — the chance of forgetting it when they walk past your café is essentially zero. Digital cards are also harder to game, and they give you data: you can see how many members you have, how many stamps were added this week, and how many rewards were used.
For the customer, the experience is frictionless. They join once, and from then on a stamp takes a few seconds per visit. No card to carry. No stamp to lose. No starting over.
Decide your reward first
Before any tooling, decide what you're offering. Choose how many stamps are needed for a reward (10 is the most common for cafés; the Octopus Menu card lets you pick anywhere from 3 to 20) and define the reward clearly. "Buy 9 coffees, get the 10th free" is the classic and it works. "Buy 4 drinks, get a free upgrade" also performs well if your margins are tighter.
Keep the reward simple and clearly valuable. Ambiguous rewards ("something nice") underperform because customers can't visualise the goal. "Free large coffee" is concrete and motivating.
Plan how customers sign up
Sign-up should take seconds and ask for as little as possible. A small card or sign explaining the deal helps enormously: "Ask for our loyalty card — 9 coffees, 10th free." People are far more likely to sign up when they understand the offer upfront.
With Octopus Menu, the card lives on the menu your customers already scan: they tap "Loyalty card", type their first name and email, and they're in — no app, no account, no password. The card is remembered on their phone, and we email them a link to it so they can open it on any phone.
Plan how stamps get added
On each visit, a staff member confirms a stamp and the customer sees their progress update instantly — a small confirmation that's surprisingly satisfying and reinforces the habit of coming back. When you design the workflow, keep it to a couple of seconds at the till so it never slows a queue. In Octopus Menu, a member of staff types your 4-digit staff code on the customer's phone and the stamp lands. A card can collect one stamp a day, and when it's full the customer taps "Use reward", staff type the code again, and a new card begins.
Promote it consistently
The biggest mistake cafés make with loyalty programmes is setting them up and then never mentioning them again. Mention it at the point of payment: "Have you got our loyalty card? It's on your phone — scan here and your 9th coffee is free." Put a small sign at the counter. Add a line to your receipts. Post about it on Instagram once.
You don't need to be pushy. Just make it part of the normal interaction so customers who want it have the opportunity to say yes.
What reward structures actually work
Based on what works for independent cafés:
- Buy 9, get 1 free — the most common, and effective because the maths is easy for customers to understand
- Buy 4, get a free upgrade — good for higher-margin venues where giving away a drink is expensive
- Buy 10, get a free slice of cake — works well if your food margin is better than your coffee margin
Whatever you choose, make the reward feel generous enough to be motivating. A loyalty programme that feels stingy is worse than not having one at all. Once you've decided, setting it up on Octopus Menu takes a minute: choose the stamps, write the reward, and switch the card on.
