Cohort Retention

The percentage of users who acquired in a given period (the cohort) who remain active or paying at later time intervals — the most honest retention metric.

What it actually means

Cohort retention groups users by acquisition month (or week) and tracks what fraction of each cohort is still active at month 1, 3, 6, 12. It removes the survivor bias of blended retention numbers — a SaaS with declining cohort retention but growing acquisition can look healthy on aggregate metrics while the underlying business is rotting. Healthy SaaS cohort curves "smile" — initial drop, then flatten as the long-term core forms.

Distinguishing it from look-alikes

Cohort retention is not the same as monthly churn. Monthly churn averages across all cohorts and obscures whether new cohorts are improving, worsening, or holding. Cohort retention shows the trend per acquisition vintage. A 5% blended monthly churn could be hiding a worsening 8% churn on the most recent cohort.

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Examples

Coaching SaaS

Track retention by founding-cohort month; aim for 80%+ retention at month 6 in the first year.

Cadence

First 25 founding coaches form Cohort 1; tracked monthly to validate product-market fit before scaling acquisition.

Notion

Public M6 cohort retention >70% — cited as cohort-curve gold standard.

HowTo schema

Eligible for step-by-step rich results AND structured for AI extraction

llms.txt

Standard for declaring AI-crawler-friendly content + which AI agents are explicitly welcomed