CAC payback period
How many months of gross profit it takes to recover the cost of winning a customer.
Last reviewed 12 September 2026
Payback is a cash question, LTV/CAC is a profitability question. A business can have a healthy LTV/CAC ratio and still starve because payback takes 20 months.
Under 12 months is comfortable for most small companies without outside funding.
Formula
CAC payback = CAC ÷ (Monthly revenue per customer × Gross margin %)
Frequently asked
What is cac payback period?+
How many months of gross profit it takes to recover the cost of winning a customer. Payback is a cash question, LTV/CAC is a profitability question. A business can have a healthy LTV/CAC ratio and still starve because payback takes 20 months. Under 12 months is comfortable for most small companies without outside funding.
How do you calculate cac payback period?+
CAC payback = CAC ÷ (Monthly revenue per customer × Gross margin %)
Why does cac payback period matter for founders?+
Under 12 months is comfortable for most small companies without outside funding.
Related terms
CAC (customer acquisition cost)
What it costs, on average, to win one new customer.
LTV (lifetime value)
The total gross profit you expect from one customer over the whole relationship.
Cash gap
A period when money leaves faster than it arrives and your balance goes negative.
Runway
How many months your current cash lasts at your current burn rate.
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