SaaS metrics
What is a good LTV:CAC ratio?
A healthy LTV:CAC ratio is around 3:1 — each customer returns roughly three times what they cost to acquire. Below about 1:1 you're losing money on every customer; above 5:1 you may be under-investing in growth. Here's what each band means, by industry, with calculators to find yours.
What each ratio band signals
| LTV:CAC | Verdict | What it means |
|---|---|---|
| Below 1:1 | Unsustainable | You spend more to acquire a customer than they're ever worth. Burning money on growth. |
| 1:1 – 3:1 | Below target | Acquisition is too expensive for the value returned. Improve retention/margin or cut CAC. |
| About 3:1 | Healthy | The classic SaaS benchmark — each customer returns ~3× what they cost to acquire. |
| 4:1 – 5:1 | Strong | Efficient acquisition with room to invest more aggressively in growth. |
| 5:1 and up | Possibly under-investing | Great efficiency, but you may be leaving growth on the table by under-spending on acquisition. |
Benchmarks are rules of thumb, not laws — read them alongside CAC payback period, retention, and margin.
The formula
LTV:CAC = customer lifetime value ÷ customer acquisition cost.
- CAC = sales & marketing spend ÷ new customers acquired (same period).
- LTV = average revenue per account × gross margin × average customer lifetime (≈ 1 ÷ monthly churn).
- Use gross-profit LTV, not revenue, for an honest ratio.
Benchmarks by industry
| Industry | Typical target |
|---|---|
| B2B SaaS | ~4:1 |
| B2C SaaS / apps | ~2.5–3:1 |
| EdTech | ~5:1 |
| Marketplaces | ~3:1 |
| E-commerce | ~3:1 |
Approximate, commonly-cited targets — your model, margin, and retention matter more than the label.
How to improve a weak ratio
- Raise LTV: reduce churn, expand accounts (upsells), and improve gross margin.
- Lower CAC: shift spend to higher-intent channels, improve conversion, lean on referrals/content.
- Shorten payback: annual prepay or higher entry tiers recover CAC faster.
Frequently asked questions
What is a good LTV:CAC ratio?
Around 3:1 is the widely cited healthy benchmark — each customer returns about three times what they cost to acquire. Below ~1:1 is unsustainable, and 5:1+ can mean you're under-investing in growth.
How do you calculate LTV:CAC?
Divide customer lifetime value (LTV) by customer acquisition cost (CAC). LTV is usually gross-margin-adjusted revenue per customer over their lifetime; CAC is sales and marketing spend divided by new customers acquired in the same period.
Should LTV use revenue or gross profit?
Use gross-profit-based LTV (apply your gross margin) for a more honest ratio. Revenue-based LTV overstates value because it ignores the cost of serving the customer.
What about CAC payback period?
Pair the ratio with CAC payback — the months to recover CAC from a customer. Many SaaS teams target under 12 months. A strong ratio with a very long payback can still strain cash flow.