Loyalty programmes are often judged by the size of their membership base. A large and growing loyalty programme membership makes an impressive line in an annual report. It says very little about whether those members are more loyal, more valuable or more profitable than they would have been without the programme.
Loyalty programme membership is cheap to acquire
Joining a loyalty programme costs a shopper almost nothing. Cashiers are often asked to enrol customers at the till, sometimes with an instant discount as the incentive. Shoppers join several programmes across competing chains. Many memberships go dormant after a handful of transactions.
Membership therefore measures reach, not behaviour. A retailer with many members and low activity has built a database, not a loyal customer base.
The measures that matter
Loyalty shows up in behaviour, and several measures capture it better than membership counts:
- Active members: the share of members who transacted in a recent period, defined consistently over time.
- Visit frequency and retention: how often members return, and how many are still shopping a year later.
- Share of wallet: how much of a customer's spending in the category goes to the retailer, which usually needs survey or panel data to estimate.
- Redemption behaviour: whether points are redeemed at all, and whether redemption is concentrated among a small group of heavy users.
- Incremental spending: whether members spend more because of the programme, rather than simply being the retailer's best customers to begin with.
The last measure is the hardest and the most important. Frequent shoppers are more likely to join a programme, so comparing members with non-members will overstate its effect. Credible measurement compares behaviour before and after joining, or uses control groups that receive no programme benefits.
Points, liability and margin
Loyalty programmes carry costs beyond running them. Unredeemed points sit on the balance sheet as a liability. Rewards given to customers who would have shopped anyway reduce margin without changing behaviour. A programme built mainly on discounts trains shoppers to wait for offers, much as a predictable sale calendar does.
Programmes that build real loyalty often lean less on points and more on benefits that change the shopping experience: priority service, early access, offers relevant to what the customer actually buys, and conveniences such as easier returns or saved preferences.
The most useful disclosure a retailer can make about its programme is not the membership number. It is active member share, retention and evidence of incremental spending. Retailers that track these, even internally, will make better decisions about how much to spend on rewards. The shift to watch is whether programmes move from rewarding every purchase to rewarding the specific behaviour the retailer wants to change, such as a second category or a return visit after a lapse.
Questions this story answers
How should retailers measure loyalty programme success?
By behaviour rather than member counts: active member share, visit frequency and retention, share of wallet, redemption behaviour and incremental spending. Incremental spending is the hardest and most important, measured before and after joining or against control groups with no benefits.
Why does a big loyalty membership base mislead?
Membership is cheap to acquire. Cashiers enrol customers at the till, often with an instant discount, shoppers join several competing programmes and many memberships go dormant. A large base with low activity is a database, not a loyal customer base.
What hidden costs do loyalty programmes carry?
Unredeemed points sit on the balance sheet as a liability, and rewards given to customers who would have shopped anyway reduce margin without changing behaviour. Programmes built mainly on discounts also train shoppers to wait for offers.
