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CAC Payback Targets (How Many Months Is Healthy?)

How to think about CAC payback targets by channel and growth stage, with trade-offs.

Quick checklist

  • Separate payback targets by channel and segment.
  • Use contribution margin if onboarding or support costs are material.
  • Account for sales cycle length and ramp time.
  • Compare payback targets against cash runway.
  • Recalculate quarterly as CAC and churn shift.

Step-by-step

  1. Calculate gross profit per month from ARPA and margin.
  2. Estimate CAC by channel and segment.
  3. Decide a target payback window (6-12 months is common).
  4. Compare payback to cash flow and growth goals.
  5. Adjust pricing or acquisition if payback is too long.

Example targets

  • SMB self-serve: 6-9 months.
  • Mid-market sales-led: 9-12 months.
  • Enterprise: 12-18 months when contracts are sticky.

Common mistakes

  • Using blended CAC across channels.
  • Ignoring onboarding ramp time for revenue.
  • Comparing payback without churn context.

Tools to use