CAC Calculator – Calculate Customer Acquisition Cost
What is Customer Acquisition Cost?
Customer Acquisition Cost (CAC) shows the average cost of acquiring a single new customer. It is the metric compared against Customer Lifetime Value to judge whether acquiring customers is economically worthwhile.
CAC Calculator
Example calculation
Marketing and sales costs of $12,000 with 80 new customers acquired give a CAC of $150 per customer. Only compared against the Customer Lifetime Value of those customers can this figure be judged as economically viable.
Why the simple formula reaches its limits in marketing
The classic CAC formula assumes that all costs and all new customers can be cleanly assigned to a single period and channel. In practice, channels often work together — a customer sees several touchpoints before buying, and one channel can drive new customers in another. CAC also only becomes meaningful once compared to Customer Lifetime Value, not as an isolated number.
Anyone who wants to correctly attribute CAC across multiple channels, compare it against CLV, and view it over a timeline instead of a static average needs a model that accounts for these factors together.
👉 Calculate CAC against CLV and channel mix: try the full tool
How to lower Customer Acquisition Cost
- Sharpen audience targeting to reduce wasted spend
- Improve landing page conversion rate
- Use referral programs, which often acquire customers more cheaply
- Prioritize channels with lower CAC relative to CLV
CAC vs. CLV vs. ROI
| Metric | Question it answers | Formula |
|---|---|---|
| CAC | What does it cost to acquire a customer? | Marketing cost / Number of new customers |
| CLV | How much total value does a customer bring? | Avg. order value × Frequency × Duration |
| ROI | How much profit per dollar spent? | (Return − Cost) / Cost × 100 |
Frequently asked questions about Customer Acquisition Cost
Which costs belong in the CAC calculation?
Besides pure ad spend, sales and personnel costs directly tied to acquiring new customers should be included. Using only ad budget makes CAC look artificially low.
What ratio between CAC and CLV is considered healthy?
A ratio of at least 1 to 3 (CLV to CAC) is often seen as healthy. If CLV is only slightly above CAC, there is often little economic margin left after further costs.
Why does CAC vary so much between channels?
Channels differ in reach, targeting precision and competitive intensity. In addition, some new customers are often attributed to multiple channels at once, which can distort single-channel comparisons.
Should CAC be calculated per channel or overall?
Both are useful. Overall CAC shows average efficiency, while channel-specific CAC shows where shifting budget could pay off.
How does shortening the sales cycle affect CAC?
A shorter sales cycle usually reduces the proportional sales cost per new customer and therefore lowers CAC, as long as the conversion rate does not drop.
