What is a good LTV:CAC ratio?
The widely cited healthy LTV:CAC ratio is 3:1. Learn what it means, why 3:1 is the target, what too-high and too-low signal, and calculate yours instantly.
The LTV:CAC ratio compares the lifetime value of a customer (LTV) to what it costs to acquire them (CAC). It is one of the first efficiency metrics investors check, because it tells you whether your growth engine actually makes money.
The benchmark: 3:1
The most widely cited target for a healthy SaaS business is an LTV:CAC ratio of 3:1 — every dollar spent acquiring a customer returns about three dollars of gross-margin lifetime value. This rule of thumb is popularised by investors and firms such as David Skok (For Entrepreneurs) and Bessemer Venture Partners.
What different ratios signal
| Ratio | What it usually means |
|---|---|
| Below 1:1 | You lose money on every customer. Unsustainable. |
| 1:1 – 3:1 | Underwater to marginal. Improve retention, pricing, or acquisition efficiency. |
| 3:1 – 5:1 | The healthy zone most investors look for. |
| Above 5:1 | Often a sign you are under-investing in growth — you could likely spend more to grow faster. |
How to calculate it
LTV is commonly calculated as (ARPU × gross margin) ÷ churn rate, and CAC as total sales & marketing spend ÷ new customers acquired. Divide LTV by CAC for the ratio. Always use gross-margin-adjusted LTV — revenue-only LTV flatters the number.
How to improve a low ratio
- Cut churn — small retention gains compound LTV dramatically.
- Raise prices or expand revenue per account (upsells, seats, usage).
- Lower CAC by improving conversion or shifting to cheaper channels.
- Increase gross margin by optimising infrastructure and support costs.
Quick LTV:CAC & payback check
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Open the SaaS Metrics CalculatorFrequently asked questions
Is a higher LTV:CAC always better?
No. A very high ratio (e.g. above 5:1) often means you are spending too little on growth and leaving market share on the table. The goal is efficient growth, not just efficiency.
Should LTV use revenue or gross margin?
Gross margin. Revenue-based LTV ignores the cost of serving the customer and overstates value. Gross-margin-adjusted LTV is the standard for credible analysis.
What time period should CAC payback be under?
Separate from the ratio, aim to recover CAC within 12 months. A 3:1 ratio with a 24-month payback can still strain cash flow.