Use cohort analysis to separate acquisition-period effects from headline retention averages.
Cohort analysis keeps you from averaging away the problem. Instead of slicing across everyone at once, it tracks groups that started together and shows their behavior over time. That is crucial in unit economics because LTV, payback, and expansion all depend on what happens after acquisition. A strong installed base can make the company look healthy while new cohorts are quietly getting worse. Cohorts expose whether the issue is customer quality, onboarding, pricing, or a channel-specific problem. When you see blended retention flatten while payback stretches, cohort analysis is usually the next move. It reveals whether the new customers you…
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