What is a good LTV:CAC ratio?
The LTV:CAC ratio divides customer lifetime value by customer acquisition cost, and a ratio of roughly 3:1 is the widely used benchmark for efficient, sustainable growth.
Formula
LTV:CAC = Customer lifetime value ÷ Customer acquisition cost
Example: A business with an $8,000 LTV and a $2,000 CAC has a 4:1 ratio—healthy, and likely under-investing in growth.
The ratio exists because neither LTV nor CAC means anything alone. Together they answer whether the acquisition engine creates or destroys value. Below 1:1 the company loses money on every customer. Around 3:1 the business is generally considered efficient.
Counterintuitively, a very high ratio is usually a warning rather than a win. A 7:1 or 10:1 ratio typically means the company is leaving growth on the table. It could profitably spend far more on acquisition and is choosing not to, often because nobody has run the numbers.
The ratio also hides timing. A 3:1 ratio where payback takes 30 months can starve a business of cash long before that lifetime value ever arrives. Always read the ratio alongside the payback period.
Because both inputs are estimates, the ratio is a directional instrument. Its value is in the trend across quarters and the comparison between channels, not in a precise decimal.
What to do about it
- Treat 3:1 as a floor for efficiency, not a target to optimize toward.
- If the ratio exceeds 5:1, test increased acquisition spend.
- Always pair the ratio with payback period before making a budget decision.
Frequently asked questions
Is a 5:1 LTV:CAC ratio too high?
Often, yes. A ratio well above 3:1 usually signals under-investment in growth—the business could profitably acquire more customers than it currently does.
What if my LTV:CAC ratio is below 1?
You are losing money on each new customer. The fix is either reducing acquisition cost, improving retention, or raising prices—and retention is usually the fastest of the three.