PricingNest

Break-Even CAC Guide

Model the maximum CAC you can afford given margin, churn, and payback targets.

Quick checklist

  • Pick a realistic payback target (6-18 months).
  • Use a gross margin that matches finance reporting.
  • Convert churn to monthly churn for consistent math.
  • Compare break-even CAC to current blended CAC.

Step-by-step

  1. Input ARPA, gross margin, and churn.
  2. Set a payback target based on cash flow needs.
  3. Compute break-even CAC and LTV:CAC.
  4. Compare to current CAC by channel or segment.
  5. Tighten pricing or retention if break-even CAC is too low.

Benchmarks

  • Early-stage SaaS often targets 12-18 month payback.
  • Mature SaaS tends to target 6-12 month payback.
  • LTV:CAC below 2 usually signals retention or margin issues.

Common mistakes

  • Using annual churn while modeling monthly payback.
  • Ignoring gross margin and using revenue instead of gross profit.
  • Averaging CAC across channels with very different payback profiles.

How to improve break-even CAC

  • Increase ARPA with packaging or seat expansion.
  • Raise gross margin by lowering variable COGS.
  • Reduce churn through onboarding and support improvements.
  • Shorten payback by reducing sales cycle costs.

Tools to use