Table of contents
A prepaid membership card campaign draws its appeal from "top up more, get more", and its risk from the same place. Set the bonus too high and prepaid funds cannot cover the service; set it too low and customers will not pay in advance. The balance lies between face value tiers, bonus rates and usage limits.
1. Cost Out a Single Card
Three cost parts: the bonus amount, fulfilment cost and the cost of holding funds. The bonus eats margin directly, fulfilment grows with usage, and holding funds means carrying a service obligation.
Calculate with the effective discount rate, not the bonus percentage. Pay 1,000, get 200 free: about 17 percent off. Pay 1,000, get 500 free: about 33 percent off. When the discount goes below your margin line, every card sold loses money.
2. Three Value Tiers
| Tier | Face value | Bonus | Effective discount | Audience |
|---|---|---|---|---|
| Entry | 3× average basket | 5% | About 5% off | New customers |
| Core | 8× average basket | 10% | About 10% off | Regulars |
| Frequent | 15× average basket | 15% | About 13% off | Heavy users |
The gap between tiers must be noticeable. Five points apart and customers do not feel it, so everyone picks the entry tier. Ten points or more is needed to drive upgrades.
3. Calculating the Bonus
Work backwards from gross margin: a category at thirty percent margin should keep bonuses near fifteen percent at most, or nothing remains after fulfilment costs.
Then calibrate by basket size: the core tier should equal two to three months of a customer's spending. Less than one month feels unnecessary; more than six months and customers worry about using it up.
4. Four Risk Clauses
Validity: twelve to twenty-four months, extendable once, to avoid long-term liabilities. Scope: which products or services accept the card.
Refunds: whether unused balances are refundable and how. Transfer: whether cards can be gifted, and whether that requires registration.
These four serve both risk control and consumer protection. Prepaid funds touch consumer rights, and vague terms invite disputes.
5. How Supermarket Cards Differ
Supermarket cards usually tie to high-frequency categories such as fresh food and household goods, and favour spend-threshold vouchers over balance discounts, because grocery margins are thin.
The usual approach is to give vouchers at top-up, restricted by category and time slot. That still delivers a sense of saving, steers traffic to off-peak hours, and lifts specific categories.
6. Campaign Rhythm
Run the card launch intensively for two weeks, then shift to standing benefits. Push during launch with in-store materials and community groups; afterwards, rely on a reminder at checkout.
Judge the campaign not by cards issued but by the balance consumption rate after three months. Below thirty percent means customers topped up and forgot, and the card has not built a habit.
7. FAQ
What bonus rate is appropriate?
Work back from margin; ten to fifteen percent is typical. Thin-margin categories should use vouchers instead of balance bonuses.
Should there be a minimum top-up?
Yes. A threshold avoids a flood of tiny cards that raise admin costs.
What about balances left unused?
Remind customers a month before expiry and offer extension or transfer rather than simply voiding.
How do we lift repeat top-ups?
Remind when the balance falls to thirty percent, with a one-off bonus for topping up at that moment.
Related reading
GrowLab columns: Marketing Insights · Supermarket Opening Event · Marketing Governance Policy
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