CAC essentials
- What is it? The total amount spent to win a single new customer
- Calculation : (Marketing expenses + sales) / Number of new customers
- Objective: Ensuring that what you spend is less than what the customer brings in
- The lever: Optimizing the CAC increases your profitability without increasing your budget
Digital marketing can sometimes feel like throwing bottles into the sea. The CAC (Customer Acquisition Cost)it's the compass that lets you know whether your bottles are coming back with results or whether you're just losing your money.
Simply put, CAC represents the investment needed to convince a prospect to get out his credit card. Whether you do SEOadvertising on Google (SEA) or test your AI visibility (GEO), the CAC is the justice of the peace.
Why is CAC the "sinews of war"?
Mastering your CAC isn't just an accounting exercise. This indicator influences all your daily activities:
- Arbitrate your budgets: If Facebook brings you customers at 10 EUR and Google at 50 EUR, you know right away where to put your next tickets.
- Protect your profitability: If you're selling a product at EUR 100 but your CAC is EUR 110, you've got a serious problem. CAC tracking alerts you before it's too late.
- Measure the effectiveness of your teams : Has your new content strategy or your latest influencer campaign really lowered the cost of acquisition? The numbers don't lie.
How do you calculate your CAC?
The basic formula is simple:
CAC = Total acquisition expenditure / Number of new customers
Elements to include in your calculation :
- Your advertising budgets (Google Ads, Facebook Ads, etc.)
- Fees for your agencies or freelances
- Time-based salaries for your marketing/sales team
- The cost of tools and software
The idea is to have an honest global view: how much does it really cost me to add a new customer to my database?
3 levers to lower your CAC
Once you know your number, the goal is to melt it away. Here's how:
- Refine your targeting : Stop talking to everyone. In SEO or SEA, the more you target specific buying intentions, the higher your conversion rate, and the lower your CAC.
- Optimize your site : Sometimes, the problem isn't the ad, but the site. If your landing page is clear and fast, you'll convert more visitors for the same budget.
- Focus on the long term (SEO & GEO): Unlike advertising, which stops as soon as you turn off the tap, SEO and AI continue to bring you customers "for free" over time.
Control your profitability with serenity
We know what it's like: juggling Google Ads, Facebook, your newsletter tool and your SEO reports to calculate a CAC can quickly become a headache. You end up not doing it at all, or doing it by the bucketful.
GreenRed exists to simplify all this. We centralize all your data to give you a readable, automatic, cross-channel CAC.