The average amount of money spent on marketing and advertising to acquire one single paying customer.
CAC (Customer Acquisition Cost) is a vital e-commerce growth metric that determines the long-term viability of a D2C apparel brand. It is calculated by dividing the total marketing and advertising expenditure over a specific period by the number of new customers acquired during that same timeframe. For instance, if a streetwear brand spends ₹50,000 on Instagram and Facebook Ads over a month, and generates 100 new customer sales, the CAC is ₹500. To run a sustainable and profitable business, your CAC must be analyzed in direct comparison to your Customer Lifetime Value (LTV) and Average Order Value (AOV). A healthy D2C clothing brand should aim for an LTV to CAC ratio of at least 3:1. If a brand's Gross Profit Margin on a t-shirt is ₹450, but the CAC is ₹500, the brand is losing money on every initial transaction. Scaling successfully requires optimizing click-through rates (CTR), improving website conversion rates (CRO), building organic search visibility (SEO), and maximizing customer retention to reduce reliance on paid ads.