Free tool
Customer Acquisition Cost calculator
Calculate your CAC, then add margin and churn to see your payback period and LTV:CAC ratio — with the benchmark read on whether they’re healthy. Free, no signup.
Instant Payback + LTV:CAC Runs in your browser
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Total S&M cost over a period.New customers acquired in the same period.
Optional — add these for payback & LTV:CAC
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Customer acquisition cost (CAC)$400$20,000 spent ÷ 50 new customers.
CAC payback5 months
LTV : CAC ratio6.7:1
CAC payback periodFast
Under ~12 months is a common SMB-SaaS target — you recover CAC quickly.
LTV:CAC ratioVery efficient
Above ~5:1 can mean you're under-investing — you may be able to spend more to grow faster.
CAC = total sales & marketing spend ÷ new customers won in the same period. Payback = CAC ÷ monthly gross margin per account. LTV:CAC compares lifetime value to what you paid to acquire it — ~3:1 is the common healthy benchmark.
The fastest way to cut CAC is to stop chasing bad-fit accounts. That’s Komo’s whole job.
Open the LTV calculatorCAC is only half the story
On its own, CAC can’t tell you if acquisition is healthy. These three numbers together can.
CACTotal sales & marketing spend ÷ new customers won in the same period. Include ad spend, tooling, and the sales/marketing salaries that drove those wins.
PaybackCAC ÷ monthly gross-margin per account = how many months to earn back what you spent. Under ~12 months is a common SMB-SaaS target.
LTV : CACLifetime value ÷ CAC. ~3:1 is the widely-used healthy benchmark; below 1:1 you're losing money per customer.
Customer acquisition cost questions, answered
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