Audit Your SaaS Unit Economics: LTV:CAC Ratio, Gross Margin Lifespan & Payback Months

Q: What is a healthy LTV:CAC ratio and CAC payback period for B2B SaaS?

Top-quartile B2B SaaS companies target an LTV:CAC ratio of at least 3.0x to 5.0x and a gross-margin adjusted CAC payback period under 12 months.

Instant VC-grade unit economics modeling for SaaS founders: compute Customer Lifetime Value (LTV), CAC payback period, Net Dollar Retention impact, and 12-month ARR projection.

✓ VC Unit Economics Benchmark Target Keyword: "saas ltv cac and payback period calculator" (92,000/mo) Est. Ad RPM: $42 – $68

INPUT SOURCE 156 chars

{
  "arpaMonthlyUsd": 79,
  "monthlyLogoChurnPct": 3.2,
  "customerAcquisitionCostUsd": 420,
  "currentActiveCustomers": 180,
  "newCustomersPerMonth": 25
}

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How to Use the SaaS LTV:CAC Calculator

STEP 01

Input your Average Revenue Per Account (ARPA), monthly churn percentage, and Customer Acquisition Cost (CAC).
STEP 02

Select your software Gross Margin (e.g., 65% for AI wrapper apps or 80%–90% for traditional SaaS).
STEP 03

Inspect your LTV:CAC ratio against the 3.0x+ venture benchmark and view your 12-month MRR/ARR trajectory.

Frequently Asked Questions (SaaS LTV:CAC Calculator)

What is a healthy LTV:CAC ratio and CAC payback period for B2B SaaS?

Top-quartile B2B SaaS companies target an LTV:CAC ratio of at least 3.0x to 5.0x and a gross-margin adjusted CAC payback period under 12 months.