How do you lower nCAC on Meta?

The fastest way to lower New Customer Acquisition Cost (nCAC) is to fix Optimization Pollution by feeding Meta a "New Customer Purchase" signal rather than a general purchase event. By using Signal Architecture to filter out repeat buyers from the optimization loop, brands typically see an $18-35\%$ reduction in nCAC because the algorithm stops "drifting" toward existing customers.

Calculate Your True New Customer Acquisition Cost (nCAC)

If you run paid acquisition for a brand or an agency, you already know the goal: bring in new customers profitably. The problem is that the number most people use to measure that, the cost per acquisition their ad platform reports, is quietly lying to them. It blends new customers and repeat buyers into one figure, which makes acquisition look cheaper and easier than it actually is. The metric that tells you the truth is your new customer acquisition cost, or nCAC. Here is what it is, how to calculate it, and how to use it to grow.