CAC Payback Period
01 Definition
CAC Payback Period meaning: The time it takes for a customer's gross profit to repay the cost of acquiring them.
CAC payback period measures how many months of a customer's contribution margin are needed to recover the acquisition cost. Shorter paybacks free up cash to reinvest. It is usually calculated on gross margin, not revenue, so profitability assumptions matter.
Why it matters
How CAC Payback Period fits the work
It shows how quickly acquisition spending returns as cash, which matters for cash flow and how fast a business can safely grow.
In context
If CAC is 600 dollars and a customer contributes 100 dollars of gross margin each month, payback takes six months.
Practical note
Using revenue instead of gross margin makes payback look faster than it is. Always base it on the profit a customer actually contributes.