Payback Period Calculator
How many months until a customer pays back their acquisition cost.
Interactive calculator
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$
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Result
Payback period
8 mo
Monthly contribution
$149
What it is
Payback period is how long it takes a new customer to repay what you spent acquiring them. Investors love short payback.
The formula
Payback (months) = CAC ÷ (ARPU × gross margin)
Why it matters
Understanding payback period calculator helps you make a better-informed decision before you commit money or time.
Worked examples
Try the example
Use the defaults above as a starting point — then adjust the inputs to match your situation.
Common pitfalls
- Double-check the units on every input — most errors come from mixing units.
- Round at the end, not in the middle of the formula.
Frequently asked questions
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