Definition
Customer acquisition cost (CAC) is the total spend required to win one new customer. It divides all sales and marketing costs over a given period by the number of new customers acquired in that same window.
The formula sounds simple. The measurement rarely is.
For any business that converts customers over the phone, CAC is routinely understated. Phone calls that never connect, calls that reach the wrong agent, calls that end without a booking: none of those failures show up in a CRM. They disappear. The spend that generated them does not.
That's where call tracking changes the calculation. When every inbound call is tied to a source, tracked through the conversation, and matched to an outcome, CAC reflects what actually happened, not just what got logged.
Convirza works with 750+ enterprise customers who use call-level data to close the gap between reported CAC and real CAC. The difference is often significant.
For a closer look at how call outcomes connect to acquisition metrics, see Lead Qualification and Sales Qualified Lead.
