What is CAC Payback Period?
Time to recover the cost of acquiring a customer.
How to calculate it
Calculate CAC Payback Period as: CAC / (Monthly gross margin per customer). Pull the inputs from your connected data and track the trend over time in your dashboard.
Examples
Example 1
$500 CAC / $80 monthly gross margin per customer = ~6.3 months to break even on acquisition.
Example 2
With a $600 CAC and $120 in monthly gross margin per customer, payback is 5 months, meaning each customer funds the next acquisition within half a year.
Why it matters
CAC payback period measures how many months it takes to recover the cost of acquiring a customer, showing how quickly acquisition spend turns cash-flow positive. Shorter paybacks reduce the capital needed to grow and lower the risk that churn erases the investment before it is recouped. Using gross margin rather than revenue in the denominator keeps the figure honest.
Benchmark context
Under 12 months is strong for SaaS; under 6 months is excellent. Capital-constrained or high-churn businesses should aim for the shorter end of the range.
Common pitfalls
Using revenue instead of gross margin overstates payback speed.
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