CAC payback calculator
How many months of a customer’s gross profit it takes to earn back what you spent to win them.
Your numbers
%
How it works
Payback (months) = CAC ÷ (monthly revenue per customer × gross margin)
The shorter, the better: money comes back sooner and can be reinvested. As a rough guide, under 12 months is strong, 12–24 months is common for larger B2B deals, and over 24 months is a warning sign.