CAC Payback Period

CAC Payback Period measures how long it takes for the cumulative gross profit generated by a customer cohort to recover the cost of acquiring those customers.

Rather than assuming each customer generates the same gross profit every month, a cohort-based approach follows customers acquired in the same period and accumulates the gross profit they generate over time. Payback occurs in the period when cumulative gross profit per customer reaches the CAC associated with that cohort.

A shorter CAC Payback Period generally indicates greater acquisition efficiency and reduces the amount of capital required to fund growth. Longer payback periods can still be appropriate for larger customers with strong retention and expansion, particularly in enterprise sales models.

Expanding customers can accelerate payback over time, while contraction and churn can delay it or prevent a cohort from reaching payback at all.

MetricFrame calculates CAC Payback on a cohort basis. For each acquisition cohort, it tracks cumulative gross profit per customer over time and identifies the period when that cumulative gross profit reaches CAC.