SaaS metrics calculator

LTV, CAC, churn, and payback from four numbers.

The Four Core Numbers

1. Monthly ARPU ($):

2. Monthly Churn Rate (%):

3. Gross Margin (%):

4. Blended CAC ($):

Customer Lifetime Value (LTV)

$3,840

$96.0/mo profit × 40.0 mo

LTV : CAC Ratio

4.27x

Healthy Unit Economics

CAC Payback Time

9.4 Months

< 1 Year Payback

Annual ARR / Customer

$1,440

ARPU × 12

Executive Summary Takeaways

Cash Flow Velocity

Every $900 spent acquiring a customer takes 9.4 months of revenue at 80% gross margin to break even.

Lifetime Retention

At a 2.5% monthly churn rate, customers remain active for an average of 40.0 months before churning.

ROI on Marketing

Each acquisition dollar generates $4.27 in total gross profit over the account lifespan.

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