What Is CAC? Customer Acquisition Cost Explained

CAC (customer acquisition cost) is the total cost of winning one new customer, including ad spend plus related sales and marketing costs, divided by the…

Spotnxt Team 22 Oct 2026 1 min read

CAC (customer acquisition cost) is the total cost of winning one new customer, including ad spend plus related sales and marketing costs, divided by the number of new customers in the same period.

How to calculate CAC

CAC = total sales & marketing cost ÷ new customers acquired

CAC vs CPA

  • CPA usually counts only ad spend for one conversion (which might be a lead, not a customer).
  • CAC counts everything it took to win a paying customer.

Why it matters

Compare CAC with LTV (lifetime value). A healthy business earns several times its CAC from each customer over time. Lowering CAC usually means better targeting, better creatives and better follow-up, like retargeting and fast replies on WhatsApp.

Related: Read the full guide → · All glossary terms →

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Written by the Spotnxt Team

We build Spotnxt, an AI platform that plans, launches and optimises Meta and Google Ads for brands in India, the US and the UAE. We write about what we see working in real ad accounts.

Frequently asked questions

CPA is the ad cost of one conversion (often a lead); CAC is the full cost of acquiring one paying customer.

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