Free SaaS Financial Calculator

SaaS LTV & Churn Calculator

Calculate your Customer Lifetime Value (LTV), LTV:CAC ratio, payback period, and retention impact in real-time to optimize your SaaS unit economics.

Input Metrics

$49
$5/mo$500/mo
4.5%
0.5% (Best in class)20% (High churn)
$120
$10$1,000
85%
50%95% (Pure SaaS)
High Margin / Under-investing in CAC
Customer Lifetime Value (LTV)

$926

Total gross margin profit generated per user over their account duration.

LTV : CAC Ratio

7.71x

Target benchmark is 3.0x or higher for healthy SaaS scaling.

Average Customer Lifespan

22.2 months

Average duration before a customer cancels their subscription.

CAC Payback Period

2.9 months

Time needed to recover customer acquisition costs. Ideally under 12 months.

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Understanding SaaS Unit Economics

Key benchmarks every bootstrapped founder should track.

What is LTV?

Lifetime Value measures the net profit a customer delivers over their entire relationship with your software.

Ideal LTV:CAC Ratio

A ratio of 3:1 means you make $3 for every $1 spent acquiring a user. Below 1.0 means you lose money on every signup.

How Churn Hurts LTV

Cutting your churn rate from 8% to 4% doubles your customer lifespan and doubles your overall LTV instantly.