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SaaS Unit Economics & Metrics Calculator

Benchmark your subscription business against venture capital standards by tracking LTV:CAC, CAC Payback, Churn Rate, NRR, and SaaS Magic Number.

Key Benchmarks for B2B SaaS Startups

Venture investors evaluate SaaS companies using standard unit economic benchmarks:

  • LTV : CAC Ratio: Ideal target is ≥ 3.0x. Less than 2.0x indicates unsustainable acquisition costs.
  • CAC Payback Period: Top-tier SaaS recovers customer acquisition costs in ≤ 12 months.
  • Net Revenue Retention (NRR): Excellent enterprise SaaS exceeds 110%–120% (expansion exceeds churn).
  • SaaS Magic Number: (Quarterly ARR Growth) / Previous Quarter Sales & Mktg Spend. Above 0.75 indicates strong sales efficiency.

Formula

ARR = MRR × 12
Customer Lifetime (Months) = 1 / Monthly Churn Rate
LTV = (ARPU × Gross Margin %) / Monthly Churn Rate
CAC Payback (Months) = CAC / (ARPU × Gross Margin %)

Frequently Asked Questions

For SMB SaaS, monthly churn is typically 1.5% to 3.0% (18–30% annual). For Enterprise SaaS, monthly churn should be under 0.5% to 1.0% (under 7% annual).
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NRR = `(Starting MRR + Expansion MRR − Contraction MRR − Churn MRR) / Starting MRR × 100`.
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📈 SaaS Unit Economics & Metrics Calculator

Subscription Revenue & Customers
Unit Economics & Acquisition
SaaS Performance Metrics
Annual Recurring Revenue (ARR)—
Avg Revenue Per User (ARPU)—
Customer Lifetime—
Customer Lifetime Value (LTV)—
LTV : CAC Ratio
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CAC Payback: 0 Months