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).
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Related terms
CAC (Customer Acquisition Cost)
CAC is the total sales and marketing spend required to acquire one paying customer.
LTV (Customer Lifetime Value)
LTV (Customer Lifetime Value) is the total revenue a SaaS company expects to earn from a single customer over the entire relationship.
MRR (Monthly Recurring Revenue)
MRR is the predictable monthly revenue a SaaS business earns from active subscriptions — the most-tracked top-line SaaS metric.
Churn Rate
Churn rate is the percentage of customers (logo churn) or revenue (revenue churn) lost in a given period.
Net Revenue Retention
Net Revenue Retention (NRR) measures the percentage of recurring revenue retained from existing customers over a period, including expansion, contraction, and churn.