Loyalty glossary · 7. Data and analytics (31)
Churn Rate
Churn rate is the percentage of members who cease qualifying activity in a loyalty programme over a measured period, typically one year. It is the complement of retention, and the single most important decay variable in any actuarial model of the programme's liability.
Churn rate is the decay term that every loyalty liability model needs but many operators refuse to set. An actuarial model without an explicit churn assumption is not conservative, it is blind. The rate tells you how fast the programme's member base turns over, and therefore how quickly unredeemed points will either be claimed or forfeited.
Churn is not a natural constant. It is set by programme design, and the single largest design lever is activity based qualification. A tier or status that requires a certain number of stays or nights will produce a cliff: members just below the threshold churn at a dramatically higher rate than members who clear it. Treating churn as a fixed input while moving qualification thresholds is how programmes surprise themselves.
The accrual side is where churn does its accounting damage. Points issued are booked as a liability, and that liability is reduced either by redemption or by a decision to release value. If the programme assumes zero churn in its accrual, it holds a liability for members who have already left. That is not prudence, it is a permanent overstatement.
Work the numbers to see the size of the distortion. A programme carries a 1 million dollar liability for a block of points issued to a cohort. If the programme sets its actuarial churn assumption at 20 percent, it releases 200,000 dollars of that liability in the current year. Raise the assumption to 30 percent and a further 100,000 dollars comes off the liability line. The members did nothing different. Only the model changed.
The trap is treating churn as a report card instead of a control. A programme can lower its churn rate by improving the earn rate, by fixing redemption friction, or by changing qualification thresholds. Each of those actions changes the liability profile, and the direction matters more than the absolute number. A churn rate that is falling for the wrong reason, such as a dead points catalogue, is worse than a high but honest churn rate.