Customer acquisition cost, or CAC, is the total amount a business spends to win one new customer. It divides all sales and marketing cost over a period by the number of customers gained in that period. CAC tells you what growth is really costing, and whether the current mix of channels can scale.
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How CAC Is Calculated
CAC is calculated by dividing sales and marketing spend by new customers acquired. Spend 50,000 in a quarter and win 100 customers, and CAC is 500.
The figure is simple to compute and easy to misread, because it moves with two levers at once: what you spend at the top, and how well everything after the click converts. A small lift in conversion lowers CAC without any extra spend, which is why the two numbers should never be read apart.
Why Content Lowers CAC
Content lowers CAC because it works after it is made, without paying per click. A paid ad charges you for every visit, while an article that ranks, answers a real question and links toward the offer keeps acquiring at close to zero marginal cost for months.
That compounding is why a strong content system pulls the sales funnel forward while the paid budget stays flat. The cost of the article is fixed once, and the returns keep arriving.
The Number CAC Hides
The trap with CAC is reading it without lifetime value beside it. A CAC of 500 looks heavy against a 400 customer and cheap against a 9,000 one.
CAC in isolation is a vanity metric waiting to happen. I have watched teams cut the channel with the highest CAC and quietly kill their most valuable customers with it. Judge CAC against what a customer is worth, never on its own.
This micro-blog is part of Rajat Jhingan’s marketing essentials. Explore more micro blogs here.
