Customer acquisition cost is revenue divided by the number of closed customers. If that's all that goes into your calculation, the number you're using to decide where to invest is wrong, and likely underestimated.
The most common CAC formula in B2B companies only considers media spend. It ignores the sales team's time closing each deal, the cost of CRM and data enrichment tools, and the cadence that sustains prospecting. The result is a flattering CAC in the report and an investment decision made on incomplete data.
The CAC formula most companies use is incomplete
“Fully-loaded” CAC sums up all direct and indirect costs of acquiring a new customer, not just what comes out of the media budget. It's the difference between knowing how much it costs to generate a lead and knowing how much it actually costs to close a customer.
Companies that calculate CAC by only looking at media often believe they are growing efficiently, when in reality they are subsidizing the inefficiency of the sales process with the marketing budget.
What goes into the calculation (and what often gets left out)
Media and tool costs
Investment in ads, content production, SEO and GEO tools, and marketing automation platforms. This part is almost always included in the calculation because it's the most visible.
Sales and marketing team hours
Salary, commission, and time dedicated by each salesperson until a contract is closed. If an SDR spends 60% of the month working on leads that never close, that cost needs to be included, even without an associated invoice.
Cadence and data enrichment costs
Prospecting tools, contact enrichment, verified lists, and the time of those operating the cadence. This is the item most often left out, especially when part of the prospecting is done internally and seems “free” just because there's no monthly invoice.
Why comparing CAC across channels without considering the time horizon is a mistake
Organic and active channels mature differently. SEO and GEO function as a compounding asset: the cost per lead decreases month by month as content accumulates authority, even without proportional new investment.
Outbound prospecting follows a linear logic: results grow almost proportionally to the effort invested in that month, but also disappear almost at the same speed if the investment stops. This is explored in more depth in the article on market intelligence-driven outbound prospecting.
Comparing the two channels by the first month's CAC is comparing things of different natures. The organic channel usually has a higher CAC initially and a lower one after a few months. Draivv's Rank Method is built precisely on this logic of an asset that continues to yield after being established.
How to measure channels that don't generate direct clicks
A growing part of the B2B buying journey happens before any trackable click. The decision-maker searches on Google, asks a generative AI, reads content, and only then directly seeks out the company, which makes this channel appear as “direct traffic” or “referral” in your source analysis.
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Draivv Rank solves part of this problem with its own telemetry for traffic coming from AI responses, attributing leads even when the original source was a conversation with ChatGPT, Gemini, or Perplexity, not a traditional click.
CAC alone decides nothing
According to the State of the Cloud report by Bessemer Venture Partners, B2B SaaS companies in the top quartile of efficiency maintain a Customer Lifetime Value (LTV) to CAC ratio of four to six times, with an investment payback period of less than twelve months.
A channel with a higher CAC but that brings in customers with a proportionally higher LTV may be worth more investment than a cheap channel that attracts low-value, high-churn customers. Deciding by looking only at isolated CAC often leads to cutting the wrong channel.
How to apply this to your operations
Before any budget reallocation between channels, it's worth mapping the real cost, channel by channel, including team time and tools, not just the media invoice.
Draivv's AI for Business Diagnostic exists precisely for this: to map processes, real costs, and bottlenecks before any investment decision, with priority defined by measured impact, not guesswork.
Learn more about Draivv!
Frequently asked questions
What is a healthy CAC/LTV in B2B companies?
The most widely used market benchmark is a minimum LTV to CAC ratio of three times, with highly efficient companies operating between four and six times, and an investment payback period of less than twelve months.
How to measure CAC for organic channels like SEO and GEO?
Divide the total cost of the channel, including content production, technical tools, and team time, by the number of customers attributed to that channel over a longer period, usually six to twelve months, as organic results accumulate over time.
How often should CAC be recalculated?
Ideally, review quarterly, especially in companies that are testing new channels or changing acquisition strategies. Organic channels require longer analysis windows to avoid appearing artificially expensive in the first few months.
