What is ROAS for a beauty brand, and where's the line between "good" and "we're overspending on Meta"? Ask five founders and you'll get five different numbers, mostly because they're comparing raw platform metrics against gut feeling instead of their own margin. Beauty ecommerce has its own quirks here: cheap COGS on some SKUs, high repeat rates, and a heavy dependence on scroll-stopping creative that skews the usual paid social math. This post breaks down the actual formula, real benchmark ranges by channel, and the specific things that distort ROAS for beauty brands more than almost any other category.