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Customer Lifetime Value calculator
Calculate your customer LTV from ARPA, margin, and churn — and instantly see your LTV:CAC ratio, payback period, and whether they’re healthy. Free, no signup.
Instant With LTV:CAC + payback Runs in your browser
$/mo
ARPA — average monthly revenue per customer.%
Revenue left after cost to serve. SaaS is often 70–85%.%
Share of customers lost each month.$
Add it to see your LTV:CAC ratio + payback.Customer lifetime value (LTV)$2,667Based on a 33.3 months average lifespan at $80.00/mo margin.
Avg customer lifespan33.3 months
Margin per month$80.00/mo
LTV : CAC ratio6.7:1
CAC payback5 months
LTV:CAC ratioVery efficient
Above ~5:1 can mean you're under-investing — you may be able to spend more to grow faster.
CAC payback periodFast
Under ~12 months is a common SMB-SaaS target — you recover CAC quickly.
LTV = (ARPA × gross margin) ÷ monthly churn. We use the margin-adjusted formula so your LTV reflects profit, not just revenue. Average lifespan = 1 ÷ churn rate.
LTV only pays off if you win the right accounts. That’s what Komo is for.
Open the CAC calculatorHow to calculate customer lifetime value
LTV = (ARPA × gross margin) ÷ churn rate. Three inputs drive it — and getting churn right matters most, because lifetime is its inverse.
ARPAAverage revenue per account per month — your total revenue divided by active customers.
Gross marginThe share of revenue left after the cost to serve. Using margin (not raw revenue) makes LTV reflect profit.
Monthly churnThe percentage of customers you lose each month. Lifetime = 1 ÷ churn, so small churn changes move LTV a lot.
Customer lifetime value questions, answered
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