Should I start a loyalty program for my shop?
Short answer: yes — if you keep it simple.
Longer answer: it depends which kind. Most loyalty programs fail because they're overcomplicated. The ones that work tend to be almost embarrassingly simple: ten stamps, one free coffee. That's it.
Regulars are your most valuable asset — and the costliest to lose
Acquiring a new customer costs 5 to 25 times more than keeping an existing one. That's not a figure to gloss over.
Think about what you actually spend to get someone through the door for the first time: flyers, social ads, a discount offer. Now think about what it takes to get a Thursday regular to also come on Mondays: a stamp.
Bain & Company found that a 5% improvement in customer retention drives 25–95% revenue growth. The lever is large because regulars don't just visit more often — they spend more, refer others, and cost nothing to acquire.
Sources: Harvard Business Review / Bain & Company
Loyalty members spend measurably more
McKinsey found that loyalty program members spend 15–25% more annually than non-members. That sounds modest — until you run the actual numbers for a small shop.
A concrete example
Say you have 30 regulars who normally visit twice a month. A simple stamp program nudges them to come one extra time per month — that's a conservative estimate from the lower end of the research.
At an average spend of €5.50:
| Per month | Per year | |
|---|---|---|
| 30 guests × 1 extra visit × €5.50 | +€165 | +€1,980 |
| Summa subscription | from €9 | from €108 |
| Net | +€156 | +€1,872 |
This isn't a best-case projection. It's the conservative end of what research consistently shows.
And it costs zero in advertising.
Source: McKinsey
Why 77% of loyalty programs fail — and why that's not about yours
There's a statistic skeptics like to cite: 77% of points-based loyalty programs fail within two years. True. And it deserves an honest answer.
The programs that fail share certain traits: complex point systems, long waits until the first reward, unclear rules, rewards that don't feel worthwhile. These are enterprise problems — they happen when a marketing team builds a program for millions of customers and loses all direct human contact in the process.
Your program is the opposite of that.
10 stamps = 1 free coffee.
Everyone understands it immediately. Everyone can calculate the value in their head. No points, no conversion rate, no expiry date, no surprises.
Research is consistent on this: simplicity is the strongest predictor of loyalty program success. Not budget. Not technology. Simplicity.
"My business is too small for a loyalty program" — it isn't
This is the most common objection. And it hides a legitimate concern: loyalty programs sound like enterprise marketing, like teams and technology a small café can't afford or justify.
But that's the wrong frame.
Retention is more valuable for small businesses, not less. If you have 200 regulars, you can't run expensive acquisition campaigns. Every customer you keep is a customer you don't have to re-acquire.
You don't need a loyalty team. You don't need an analytics department. You need a stamp card and guests who feel appreciated.
85% of consumers prefer buying from businesses with a loyalty program. 43% say they've spent more because of one. These numbers aren't just about supermarkets — they apply anywhere regulars form.
Sources: Queue-it / Lightspeed; EY 2025 Loyalty Market Study
Why it works for your type of shop
Café
Coffee is the ideal loyalty product because it's a daily ritual. Someone who grabs their morning coffee isn't actively searching for the cheapest option — they want consistency and a good feeling. A stamp card amplifies exactly that: it turns a habit purchase into small progress toward a reward.
Behavioral psychology calls this the goal gradient effect: the closer someone is to a goal, the more frequently they visit. At 8 of 10 stamps, a guest drops in more often than at the start.
Bakery
Bakeries benefit from regulars who already stop in every morning. The stamp program doesn't need to force a behavior change — it rewards what customers already do. The critical effect: it gives someone a reason to choose your bakery when another one 50 meters away sells similar rolls.
Restaurant
Especially effective for lunch regulars: someone who grabs the daily special every other day fills a card in three weeks. The reward — a free lunch — carries high perceived value at controlled cost. That's more efficient than discount coupons, which drag your overall price perception downward.
Hair salon & beauty
Visit cycles are longer here, but customer lifetime value is high. A program that rewards after the 8th or 10th visit gives clients a concrete reason to come back rather than try the new opening down the street. When a single appointment is worth €60–120, retention beats acquisition every time.
Why a half-full stamp card is hard to walk away from
You've felt this yourself: you have 7 of 10 stamps on a card, and you don't switch to the place around the corner. Not because of the coffee. Because of the 7 stamps.
That's not weak willpower — it's loss aversion. Losing something you already "have" feels worse than forgoing an equivalent gain. Seven stamps are seven stamps. Giving them up takes real effort.
Endowed progress research shows customers given a card with 2 pre-loaded stamps (10 required total) complete it at 34% higher rates than those given a blank 8-stamp card — even though the actual requirement is identical. The sense of having already started is a powerful motivator.
No advertising campaign creates that. A stamp card does.
Source: Nunes & Drèze 2006, Journal of Consumer Research
"Too much effort" — how much effort is it really?
A lot of what gets called a "loyalty program" is genuinely too much effort: your own app, customer data management, points calculations, prize catalogs. That's the image most people carry.
Setting up a stamp program on Summa takes under 10 minutes:
- Enter your shop name
- Define a reward ("Every 10th coffee free")
- Print a QR code and put it at the till
That's it. Your customers don't need to download an app. Don't need to create an account. They scan their QR code or tap their phone against your NFC sticker — stamp done.
You see in the dashboard how many active cards you have and when stamps were given. Nothing more, nothing less.
What now?
If reading this has you thinking a stamp program might be worth trying — give it a go. Summa is free for 30 days, no credit card needed. You can try everything in the demo before registering anything.