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* Profit Curve methodology pioneered by Jason Cohen at WP Engine. Learn more →

v3.118.0.0 · Beta

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  5. Unit Economics Calculator

SaaS Unit Economics Calculator

Calculate your customer lifetime value, CAC payback period, and Rule of 40 score. See which levers have the biggest impact on your unit economics.

Calculate Your Unit Economics
Enter your ARPU, CAC, churn rate, and margins to see your core SaaS health metrics and sensitivity analysis.
Healthy Benchmarks

LTV:CAC ≥ 3x

Industry standard for a healthy SaaS business. Below 3x means you're spending too much to acquire customers.

CAC Payback < 12 months

Recover your acquisition cost within a year. Longer payback periods strain cash flow.

Rule of 40 ≥ 40

Growth rate + profit margin should exceed 40%. The gold standard for SaaS efficiency.

Monthly Churn < 3%

Best-in-class SaaS companies keep monthly churn below 2%. Above 5% requires urgent attention.

The Profit Curve Connection

Your blended unit economics hide the truth. Head customers might have 5x LTV while tail customers never pay back CAC.

Upload your data to see per-segment economics and find where your acquisition spend is actually paying off.

See per-segment unit economics →
How These Metrics Work
  • LTVLifetime Value = Gross Profit per Month / Monthly Churn Rate. Total profit a customer generates before churning.
  • L:CLTV:CAC Ratio = LTV / CAC. Measures acquisition efficiency. 3x+ means you earn 3x what you spend to acquire.
  • CACCAC Payback = CAC / Gross Profit per Month. Months to recover your customer acquisition investment.
  • R40Rule of 40 = Revenue Growth % + Gross Margin %. Benchmark for balancing growth against profitability.

Your data is processed locally — nothing is sent to our servers.

How It Works

1
Enter Your Metrics
Input your ARPU, customer acquisition cost, churn rate, gross margin, and growth rate. Adjust sliders to explore scenarios instantly.
2
See Your Economics
Get instant LTV, LTV:CAC ratio, CAC payback period, and Rule of 40 score with health grades for each metric.
3
Optimize
Use the sensitivity table to see which lever — ARPU, churn, margin, or CAC — has the biggest impact on your lifetime value.

See per-customer unit economics from your actual data. Growth users get LTV, CAC payback, and contribution margin by segment.

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From Unit Economics to Customer Economics

You know your per-unit numbers. Now see how they play out across your entire customer base.

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Your data is processed locally — nothing is sent to our servers.