SaaS Revenue Calculator
Model your MRR growth, churn impact, LTV:CAC ratio, and revenue projections.
Inputs
Monthly Recurring Revenue today
$
Monthly revenue per customer
$
% of customers lost per month
%
New paying customers added monthly
Average cost to acquire one customer
$
Months to project forward
mo
Current ARR
$600.0K
Customers
333
LTV : CAC
12.5x
Healthy
Customer LTV
$7.5K
CAC Payback
4.0 mo
Quick Ratio
4.5
New MRR / Churned MRR
Monthly Revenue Churn
$1.0K
Net New MRR / Month
$3.5K
MRR Projection — 24mo(+134%)
Customer Growth
How This Calculator Works
This SaaS Revenue Calculator models the core financial metrics that drive subscription businesses. Enter your current MRR and unit economics to see projections and health indicators.
Key Formulas
- ARR = MRR × 12
- LTV = ARPU ÷ Monthly Churn Rate
- LTV:CAC = LTV ÷ CAC (target: ≥ 3x)
- CAC Payback = CAC ÷ ARPU (months)
- Quick Ratio = New MRR ÷ Churned MRR (target: ≥ 4)
- Net New MRR = New MRR − Churned MRR
Benchmark Targets
- Monthly Churn: <2% (healthy), <0.5% (elite)
- LTV:CAC Ratio: ≥3x
- CAC Payback: <12 months
- Quick Ratio: ≥4 (growth), ≥1 (survival)
- Net Revenue Retention: >100% (expansion)
Results are estimates based on constant churn and growth assumptions. Actual results will vary with expansion revenue, seasonal patterns, and cohort-level behavior.