CAC Payback Period Calculator
Find how many months it takes to recover the cost of acquiring a customer. Under 12 months is healthy for B2B SaaS — see where you land.
Payback period
10.0 months
$120/mo gross profit per account
Strong — under 12 months is healthy for B2B SaaS. You recover acquisition cost quickly and can scale spend.
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How to Use This Calculator
Enter your fully-loaded customer acquisition cost (CAC).
Add average monthly revenue per account and gross margin %.
We divide CAC by monthly gross profit to get payback months.
Compare to the 12-month benchmark and adjust your inputs.
Frequently Asked Questions
What is a good CAC payback period for SaaS?
Under 12 months is considered healthy for most B2B SaaS. 12–18 months is workable, and anything over 18 months ties up cash for too long and signals an efficiency problem.
How is CAC payback period calculated?
CAC ÷ (average monthly revenue per account × gross margin %). Using gross margin instead of raw revenue gives the true cash recovery rate.
Why use gross margin instead of revenue?
You only keep the gross-margin portion of each dollar of revenue, so margin-adjusted payback reflects real cash recovered — not top-line.
How do I shorten my payback period?
Lower CAC (better targeting, higher conversion), raise prices/ARPA, or improve gross margin. Faster onboarding to value also helps retention, which compounds the benefit.
Is CAC payback the same as the LTV:CAC ratio?
No. Payback measures speed of cash recovery (months); LTV:CAC measures total return over a customer’s life. Healthy SaaS businesses watch both.
Why Use This Calculator
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See payback in months from CAC, ARPA, and gross margin
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Benchmark against the <12-month B2B SaaS standard
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Spot when acquisition spend is tying up too much cash
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Model the impact of higher prices or lower CAC
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