Digital marketing term
CAC
Acquisition Cost is the total amount a business spends, on average, to win one new customer or conversion.
Detailed explanation
Acquisition Cost is the average amount spent to generate a single new customer, lead, or conversion. It is usually calculated by dividing total marketing and sales spend for a given period by the number of conversions that spend produced, but a rigorous calculation also folds in creative production, tooling, agency fees, and the labor time behind a campaign — not just raw media spend.
The metric only becomes meaningful when it is weighed against what that customer is worth over time. A €40 acquisition cost is excellent for a subscription product with a €600 lifetime value and a problem for a one-time purchase that nets €35 in margin. That is why acquisition cost is almost always discussed alongside customer lifetime value (LTV): a healthy LTV-to-acquisition-cost ratio (commonly cited as 3:1 or higher) signals that growth spend is sustainable rather than simply buying revenue at a loss.
Acquisition cost also differs subtly from CPA (Cost Per Acquisition) in how teams use it: CPA is typically a channel-level or campaign-level metric pulled straight from ad platform reporting, while acquisition cost is often a blended, company-wide figure that includes offline and indirect costs. Tracking both in parallel — blended acquisition cost for the business and channel-level CPA for optimization — gives a more complete picture than relying on either number alone.
Frequently asked questions
- What is Acquisition Cost?
- The average total cost — media spend plus creative, tooling, and labor — required to win one new customer or conversion.
- How is Acquisition Cost calculated?
- Divide total marketing and sales spend for a period by the number of new customers or conversions generated in that same period.
- How do you know if your Acquisition Cost is too high?
- Compare it against customer lifetime value. If LTV is less than roughly three times your acquisition cost, the channel or campaign is unlikely to be sustainably profitable.
Related terms
Internal links for the topic cluster — read these concepts together.
- LTV (Customer Lifetime Value)LTV is the estimated total revenue a customer will generate for a company over the course of their relationship with the brand; it's a core metric for evaluating long-term marketing return.
- Churn RateChurn Rate is the metric that expresses the percentage of customers who stop using a brand's service or product within a given period; it's a critical indicator of sustainable growth in subscription-based businesses.
- ROASROAS (Return on Ad Spend) is the revenue generated for every unit of advertising spend; it is used to measure profitability in performance marketing.
- Profit MarginProfit Margin is a core financial performance indicator that shows the percentage of a business's total revenue that becomes actual profit, revealing how much of sales converts into real earnings.