LTV:CAC ratio

Lifetime value to customer acquisition cost ratio

Revenue

A comparison of what a customer is worth over their whole relationship with you against what it cost to win them.

What is LTV:CAC ratio?

The LTV:CAC ratio puts two numbers side by side: customer lifetime value (the gross profit a customer brings in before they leave) and the cost of winning a customer (ad spend, discounts, creator fees and sales costs, divided by the customers they brought in). How to read it: - Below 1:1 you lose money on every customer you win. - Around 1:1 you break even, with nothing left for overhead or growth. - 3:1 is a rule of thumb many founders and investors quote as healthy. It's a starting point, not a law: a brand with cheap repeat orders and fast payback can run lower. - Very high can mean you are underspending on growth. Use gross profit, not revenue. A $40 customer cost against $120 of lifetime revenue looks like 3:1, but at a 50% margin it's really 1.5:1. For subscriptions, watch payback too. The ratio says whether a customer pays off eventually. Payback time says when. A subscriber who needs nine renewals to cover their cost is at risk if many cancel by order four. How Chargezen handles it: Chargezen Subscriptions analytics track lifetime revenue for your subscribers, and the free lifetime value calculator works out the ratio from your own numbers.

Formula

LTV:CAC = Customer lifetime value (gross profit) ÷ Customer acquisition cost

Example

A coffee brand spends $30 to win a subscriber. The average subscriber stays 8 months at $20 a month with a 45% gross margin, so lifetime value is 8 × $20 × 0.45 = $72. The ratio is $72 ÷ $30 = 2.4:1.

Why LTV:CAC ratio Matters

It tells you how much you can afford to spend to win a customer, and whether growth is making you money or burning it.

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