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DTC Unit Economics: Metrics That Matter for Beauty Brands

Madison Colaw · 2026-04-09

DTC Unit Economics: The Metrics That Actually Matter (And the Ones Everyone Gets Wrong)

A beauty brand founder told me last month she was "scaling profitably." Her Meta ROAS was 3.2x. Revenue was up 40% year-over-year. She'd just hired two new people.

Then I asked her contribution margin per order.

She didn't know the number. Not roughly, not ballpark. She'd never calculated it. She was making hiring decisions based on revenue growth while her actual profit per order was negative after you included shipping, payment processing, the 25% discount she ran on every acquisition campaign, and the returns she was eating on 18% of orders.

This is not unusual. Most DTC brands operate with a rough sense of their unit economics but have never built the actual model. They know their ROAS. They know their top-line revenue. They might know their gross margin from their accountant. But the numbers that actually determine whether a DTC brand can scale, the numbers that separate the brands that grow to $50M from the ones that flame out at $8M, those numbers live in a spreadsheet nobody has built.

Here are the six ecommerce unit economics metrics that matter. Not the textbook definitions. The way operators actually need to think about them.

1. Customer Acquisition Cost (CAC): You're Calculating It Wrong

Every DTC brand knows their CAC. Almost none of them calculate it correctly.

The standard formula is simple: total marketing spend divided by new customers acquired. But "total marketing spend" is where brands lie to themselves.

Most brands calculate CAC using only their ad spend. They take their Meta and Google budget, divide by new customers, and call it a day. That number is their CPA (cost per acquisition on a specific channel), not their CAC.

Real CAC includes everything you spent to acquire that customer: