You're looking at customer acquisition cost wrong. The number you're optimizing isn't the number that matters. Here's the reframe that changed how I think about DTC unit economics.
You're looking at customer acquisition cost wrong. The number you're optimizing isn't the number that matters.
Most brands track CAC as: ad spend ÷ new customers. Simple. Clean. Wrong — or at least incomplete.
The real question isn't "how much did it cost to get this customer?" It's "how much did it cost to get a customer who stays?"
A $40 CAC with a 20% repeat purchase rate is a fundamentally different business than a $40 CAC with a 60% repeat purchase rate. The first brand is on a treadmill. The second is building something.
The reframe:
Start thinking about "effective CAC" — your acquisition cost adjusted for retention. If you're acquiring customers who churn immediately, your effective CAC is much higher than your reported CAC, because you're paying to replace them constantly.
The brands I've seen scale sustainably — the ones that hit $50M, $100M, $200M — all have one thing in common: they obsess over first-order experience as much as they obsess over acquisition. Because they know that a retained customer is a customer you don't have to pay to acquire again.
Retention is your real CAC. Optimize accordingly.