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Payback Period Calculator

Payback Period Calculator

payback period calculator Calculate customer acquisition payback period and understand how long CAC takes to recover.

Calculate customer acquisition payback period from CAC, monthly revenue per customer, and gross margin.

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Use the Payback Period Calculator

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Payback period

4.44 months

Monthly gross profit

$27.00

A $120.00 CAC paid back by $27.00 monthly gross profit takes 4.44 months.

Customer acquisition payback period estimates how long it takes to recover customer acquisition cost from the gross profit that customer produces.

A simple formula is: payback period = CAC / monthly gross profit per customer. Monthly gross profit can be estimated from monthly revenue per customer multiplied by gross margin. If CAC is $120 and monthly gross profit is $27, payback period is 4.44 months.

Use payback period when acquisition looks profitable on LTV but cash recovery still matters. A campaign can have strong LTV:CAC but still put pressure on cash flow if payback takes too long.

Payback period should be reviewed with LTV, CAC, CPA, ROAS, ROI, and retention. Shorter payback gives a business more flexibility to reinvest in growth, while longer payback needs stronger confidence in retention and repeat purchase behavior.

How to use it

Step 1

Enter customer acquisition cost for a new customer.

Step 2

Enter monthly revenue per customer.

Step 3

Enter gross margin to estimate monthly gross profit.

Step 4

Review how many months it takes to recover CAC from customer gross profit.

FAQ

What is customer acquisition payback period?

It estimates how long it takes for customer gross profit to recover the cost of acquiring that customer.

How do you calculate CAC payback period?

Divide customer acquisition cost by monthly gross profit per customer.

Is payback period the same as LTV?

No. Payback period focuses on how quickly acquisition cost is recovered, while LTV estimates total customer value over time.

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