PricingNest

CAC Payback Scenarios

Model payback across best, base, and downside scenarios to set acquisition guardrails.

Quick checklist

  • Use base, optimistic, and conservative assumptions.
  • Keep churn consistent with retention reporting.
  • Include onboarding or support costs in margin.
  • Set a hard ceiling for CAC by channel.
  • Re-check after pricing changes.

Step-by-step

  1. Calculate base payback with current ARPA and margin.
  2. Increase churn to model a downside scenario.
  3. Raise ARPA to test expansion upside.
  4. Convert payback limits into max CAC.
  5. Use the break-even CAC as the hard cap.

Signals to act on

  • Payback above target means you must raise ARPA or cut CAC.
  • Short payback allows more aggressive channel spend.
  • Wide sensitivity range means weak pricing confidence.

Common mistakes

  • Using blended CAC instead of channel-level CAC.
  • Ignoring implementation or onboarding costs.
  • Treating discounting as permanent ARPA.

Tools to use