SaaS Metrics
SaaS Unit Economics Calculator
Input your core metrics and get an instant health score with benchmark comparisons.
Your Metrics
Unit Economics Score
Healthy
62
/100
Benchmark: 3× CAC minimum
✓ Healthy (≥ 3×)
⚠ Acceptable (12-18 mo)
✗ High (> 10%)
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How to Use This Tool
Enter your Customer Acquisition Cost (CAC), Average Revenue Per User (ARPU), and churn rate. The calculator computes your LTV, LTV:CAC ratio, and payback period — the three metrics that tell you whether your business model actually works.
Core Formulas
LTV = ARPU ÷ Churn Rate | LTV:CAC = LTV ÷ CAC | Payback = CAC ÷ Monthly ARPU
LTV tells you how much a customer is worth over their lifetime. LTV:CAC tells you whether you're spending the right amount to acquire them. Payback tells you how fast you recover your acquisition cost.
Why This Matters
Unit economics determine whether your company can scale profitably. A SaaS company with a 5:1 LTV:CAC ratio can aggressively invest in growth. A company with a 1.5:1 ratio is burning cash on every customer. VCs won't fund growth that doesn't have a path to positive unit economics.
Industry Benchmarks
Healthy LTV:CAC
≥ 3:1
Below 3:1 means acquisition is too expensive
Good Payback Period
< 12 months
Recover CAC within a year
Target Churn (SaaS)
< 5% monthly
Best-in-class is < 2% monthly
What to Do With Your Results
- 1If LTV:CAC is below 3:1, either reduce CAC (cheaper channels) or increase LTV (reduce churn, upsell).
- 2If payback is over 18 months, you need more capital to sustain growth — factor this into your fundraising plan.
- 3Track these metrics monthly — improving unit economics is as important as growing revenue.
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