Unit economics
Do you actually make money on each customer? These free calculators check your LTV:CAC, CAC payback and churn against healthy ranges for early-stage SaaS — so you know whether each customer is worth more than it costs to acquire and keep.
LTV:CAC Calculator
Is each customer worth more than they cost?
CAC Payback Calculator
How long until a customer pays back what they cost?
Churn Calculator
How much of my revenue am I losing each month?
NRR Calculator
★ our dataNet revenue retention: do you keep and grow revenue from existing customers?
Gross Margin Calculator
★ our dataHow much of each euro of revenue do you keep after cost of revenue?
FAQ
What are unit economics for a SaaS?
The profit and cost of a single customer: what they are worth over their lifetime (LTV) versus what it costs to acquire them (CAC), how fast that cost is repaid (CAC payback) and how many you lose (churn). Healthy unit economics mean each customer earns more than it costs.
What is a healthy LTV:CAC ratio?
Around 3:1 or higher is the common benchmark for early-stage SaaS — each customer worth roughly three times its acquisition cost. Below 1:1 you lose money on every customer; far above ~5:1 can mean you are under-investing in growth.
How does churn affect whether I make money per customer?
Churn is the inverse of customer lifetime: 5% monthly churn implies an average life of about 20 months, which caps LTV. Lower churn lengthens the life and raises LTV — often the cheapest lever on your unit economics.
Ready for the full picture?
Each tool checks ONE number. The Viability Model runs them into one default-alive verdict, with benchmarks, scenarios, a cap table and a PDF.