PricingNest

Gross Margin vs Contribution Margin (Which to Use for Pricing)

When to use gross margin vs contribution margin in pricing and CAC payback models.

Quick checklist

  • Use gross margin for high-level pricing benchmarks.
  • Use contribution margin for CAC payback and LTV models.
  • Include support and onboarding in contribution margin.
  • Keep definitions consistent across teams.
  • Revisit margin definitions quarterly.

Step-by-step

  1. Define COGS for gross margin (infra, vendor costs).
  2. Add variable support and onboarding to calculate contribution margin.
  3. Use gross margin for pricing benchmarks and board metrics.
  4. Use contribution margin for CAC payback and LTV decisions.
  5. Validate margin assumptions with actual finance data.

Example scenarios

  • Self-serve SaaS: gross margin is often enough for pricing tiers.
  • Sales-led SaaS: contribution margin is better for payback math.
  • Usage-heavy product: contribution margin avoids understating fulfillment costs.

Common mistakes

  • Using gross margin in CAC payback models.
  • Ignoring support costs that scale with customer volume.
  • Mixing definitions across departments.

Tools to use