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Why a customer who costs $50 can be worth $600
💡 Great marketing means acquiring customers for far less than their lifetime worth — with an LTV:CAC ratio that's high, but not so high it starves growth.
Every customer you win has a price tag and a payoff. The price is CAC (Customer Acquisition Cost) — total sales and marketing spend divided by the number of new customers it brought in. The payoff is LTV (Lifetime Value) — the total profit a customer generates before they leave. Marketing isn't really about clicks or impressions; it's about keeping the ratio between these two numbers healthy.
The classic operator's benchmark is an LTV:CAC ratio of about 3:1. Spend $50 to acquire a customer worth $150 in lifetime profit and the engine is working. If the ratio slips toward 1:1, you're paying almost as much to get customers as they'll ever return — you're buying revenue at a loss. Netflix, for example, can justify heavy acquisition spend precisely because a subscriber who stays for years has a large LTV.
Here's the counterintuitive part: a ratio that's too high (say 8:1) isn't a trophy — it often means you're underspending on marketing and leaving growth on the table. Competitors willing to pay more per customer can outgrow you. Also watch the payback period: even a great LTV doesn't help if it takes three years to earn back what you spent today, because that cash is tied up while you keep spending to grow.