Loyalty Program ROI Calculator
Members spend more partly because loyal people join.
Programme profit
$100,464
$48.80 of genuine uplift per member
Members spend more partly because loyal customers join loyalty programmes, not only because the programme made them loyal. Attributing the whole $122.00 gap to the programme is the standard error, and it usually turns a marginal programme into an apparently excellent one.
How the Loyalty Program ROI Calculator works
Members spend more than non-members partly because loyal customers join loyalty programmes, not only because the programme made them loyal. Attributing the whole gap to the programme is the standard error, and it turns a marginal programme into an apparently excellent one.
Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price — check the platform's current fee schedule before you price a product against it. This is not tax or business advice.
Frequently asked questions
How do I measure loyalty programme ROI honestly?
Estimate what share of the member-versus-non-member spend gap is self-selection and remove it. A staged rollout or a holdout region is the only rigorous way to size that share.
How much of the gap is usually self-selection?
Most studies that test it properly find a majority. Programmes rarely create loyalty from nothing; they reward and slightly reinforce loyalty that already existed.
Does that mean loyalty programmes are pointless?
No — reinforcing existing loyalty has real value, and the data a programme generates is often worth more than the incremental spend. It just should not be justified on the raw spend gap.
What are the real costs?
Rewards issued, the running cost of the platform, and the margin on discounts to people who would have paid full price. The last one is the largest and the least visible.