Customer acquisition cost (CAC) is the total amount of sales and marketing investment required to acquire one new customer, calculated by dividing total marketing and sales expenses by the number of customers acquired in a period.
CAC forces teams to be honest about the economics of growth. It answers a deceptively simple question: how much do we actually spend to land each deal? The answer matters because it directly constrains your growth potential. If CAC is too high relative to contract value, you have a unit economics problem that no amount of volume will fix.
Calculating CAC requires discipline. Sum all sales and marketing costs (salaries, tools, travel, paid media, events, partner fees) over a period, then divide by the number of new customers closed in that same period. The key is excluding costs tied to retention, expansion, or support. You're measuring the cost to go from unknown prospect to paying customer, nothing more.
For B2B companies, CAC varies wildly by segment. An enterprise deal might carry a CAC of tens of thousands of dollars but close for millions in ACV. A mid-market deal might have a CAC of a few thousand. This variance makes benchmarking treacherous. What matters is your CAC relative to your average contract value and the lifetime value you extract from each customer. If CAC is below one third of LTV and takes less than a year to recover, your unit economics are generally healthy.
ABM inherently improves CAC by concentrating spend on high-probability accounts. When you stop spraying campaigns and instead orchestrate personalized efforts against a curated target list, conversion rates increase, sales cycles shorten, and average deal size grows. The result: lower CAC for high-value customers. Abmatic's intelligence layer identifies which accounts to pursue and how to engage them, directly optimizing CAC for the deals that matter most.