# Customer Acquisition Cost (CAC): The Number Behind Profitable Growth

> CAC is what it costs to win one new customer. Here's how to calculate it, why the LTV:CAC ratio matters, and how to bring CAC down.

- URL: https://www.pyalm.com/blog/customer-acquisition-cost-guide
- Author: Fadhil Abdulla
- Category: Free Tools
- Published: 2026-06-23
- Updated: 2026-06-23

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## What CAC tells you

Customer acquisition cost (CAC) is the total sales and marketing spend divided by the number of new customers it won. It's the clearest measure of how efficiently you grow. The free [CAC Calculator](https://www.pyalm.com/free-tools/cac-calculator) computes it in one step.

## The formula

CAC = total sales + marketing spend ÷ new customers acquired in the same period. Spend AED 50,000 and win 100 customers, and your CAC is AED 500.

## CAC vs lifetime value

CAC only makes sense beside customer lifetime value. If you spend AED 500 to acquire a customer worth AED 1,800, that's a healthy 3.6:1 ratio. If CAC creeps toward CLV, growth stops being profitable. Calculate the other side with the [CLV Calculator](https://www.pyalm.com/free-tools/customer-lifetime-value-calculator).

## Lowering CAC

- Improve conversion so the same spend wins more customers.
- Lean into channels with the best return — check them with the [ROI Calculator](https://www.pyalm.com/free-tools/roi-calculator).
- Boost referrals and retention to reduce reliance on paid acquisition.

[Use the free CAC Calculator](https://www.pyalm.com/free-tools/cac-calculator) | [CLV Calculator](https://www.pyalm.com/free-tools/customer-lifetime-value-calculator)