SaaS Marketing
CAC Payback Period
Quick definition
CAC Payback Period is the number of months it takes for a customer's gross margin to repay the cost of acquiring them.
Formula: CAC ÷ (ARPU × Gross Margin). A common SaaS benchmark targets payback under 12 months for SMB, under 18 for mid-market, and under 24 for enterprise.
Why CAC Payback Period matters
Shorter payback means faster cash recycling — less capital required to fund the same growth rate. Long payback periods amplify cash needs and risk.
How CAC Payback Period works in practice
Improve payback by raising ARPU (pricing, packaging), cutting CAC (efficient channels), or improving gross margin (lower COGS).