Total sales and marketing spend divided by new customers won, same period.

Enter a percentage: 80 means 80%. Same convention as the LTV:CAC calculator.

CAC payback period

Excellent

5.7 months

Best-in-class. You recover acquisition cost within a year, which means growth largely self-funds.

You earn back the $450 CAC after 5.7 months of $79.20 monthly gross profit.

Gross profit / customer / mo
$79.20

$99 ARPU at 80.00% margin

CAC
$450

Fully loaded acquisition cost

Gross profit needed for 12-month payback
$37.50

CAC ÷ 12 months

LTV:CAC at the same inputs
4.9x

Assuming a 28-month average customer lifetime

Within the 12-month rule of thumb. Growth at this payback largely self-funds, which means you can reinvest cash from existing customers into acquiring more.

CAC Payback Calculator by SaaS Metrics Calculators — free, no signup, nothing stored.