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LTV:CAC Ratio
Lifetime value divided by customer acquisition cost. It summarizes how many times a customer covers what it cost to win them.
Detailed explanation
Numerator and denominator must use the same period and the same customer definition. Inflating LTV with heroic tenure, or shrinking CAC to ads-only, makes the ratio look pretty.
The folk 3:1 rule is not universal. A high ratio with a 24-month payback can still starve cash.
Channel-level ratios differ. Organic looks cheap; brand spend may raise LTV later. Cutting one channel from a blended view is a short-term trap.
Frequently asked questions
- Is 3:1 mandatory?
- No. Sector, margin, and cash cycle matter more. Watch payback, not a memorized ratio.
- Why can a high ratio still burn cash?
- LTV arrives over years; CAC is paid now. A long payback period makes growth expensive.
Related terms
Internal links for the topic cluster — read these concepts together.
- LTV (Customer Lifetime Value)LTV is the estimated total revenue a customer will generate for a company over the course of their relationship with the brand; it's a core metric for evaluating long-term marketing return.
- CACCustomer Acquisition Cost: the average cost to win a new customer. If media is the only input, the number looks cheaper than it is.
- Payback PeriodHow many months until a customer’s contribution recovers CAC. It is a cash view, not just an LTV:CAC ratio.
- Churn RateChurn Rate is the metric that expresses the percentage of customers who stop using a brand's service or product within a given period; it's a critical indicator of sustainable growth in subscription-based businesses.
- North Star MetricA North Star Metric is the single, top-priority performance indicator that best reflects a company's long-term success and the core value it delivers to customers.