SaaS CAC Payback Period Calculator
CAC Payback Period = months to recover the cost of acquiring a new customer through gross margin. Top SaaS companies achieve <12 months. Bessemer Cloud Index reports median 18-24 months for venture-backed B2B SaaS. Source: bvp.com, openview.com.
How to Calculate CAC Payback Period
Formula: CAC ÷ (Monthly ARPA × Gross Margin %) = Payback Months. Example: $3,000 CAC, $500 ARPA, 75% margin → $3,000 ÷ ($500 × 0.75) = $3,000 ÷ $375 = 8 months. The standard formula uses gross-margin contribution, not gross revenue — covers cost of serving (hosting, support, etc.) before margin is true recovery. Source: openview.com 2026 SaaS Benchmark.
CAC Payback Benchmarks for SaaS in 2027
Top quartile: <12 months. Median: 18 months. Bottom quartile: >24 months. SMB-focused: typically 8-15 months. Mid-market: 12-20 months. Enterprise: 18-36 months (long sales cycles, large deals). Bessemer State of the Cloud reports VC-backed cohort medians of 18-24 months across recent years.
How to Shorten CAC Payback
(1) Increase ARPA via expansion revenue (cross-sell, upgrade tiers). (2) Improve gross margin via auto-scaling infra and self-serve onboarding. (3) Reduce CAC via product-led growth (PLG), referrals, organic SEO. (4) Eliminate worst-performing acquisition channels. Top SaaS like Slack, Zoom achieved <6 months CAC Payback at scale via PLG.
CAC Payback vs LTV:CAC Ratio
CAC Payback measures recovery speed (months). LTV:CAC measures lifetime profitability (ratio). Healthy SaaS: <12 months CAC Payback AND >3× LTV:CAC. Top quartile: <6 months AND >5× LTV:CAC. Both metrics needed — fast payback with low LTV could mean churning customers; long payback with high LTV could mean cash-flow strain.