It's the single number that tells you whether your growth engine creates value or burns cash. Here's where yours should land.
The LTV:CAC ratio compares how much a customer is worth over their lifetime (LTV) to what it costs to acquire them (CAC). It answers the most important question in a growth business: for every dollar you spend winning a customer, how many dollars come back?
The widely cited healthy ratio is 3:1 — three dollars of lifetime value for every dollar of acquisition cost. It leaves room to cover overhead and still profit after paying to grow.
A ratio near 1:1 means you barely break even on acquisition. Below 1:1, you lose money on every customer you add — growth actively destroys value.
Divide lifetime value by acquisition cost. If LTV is $1,920 and CAC is $300, your ratio is $1,920 ÷ $300 = 6.4:1.
Use gross-profit LTV (revenue × gross margin × lifespan), not revenue alone, so the ratio reflects real money available to reinvest.
| Ratio | What it usually means |
|---|---|
| Below 1:1 | Losing money per customer |
| 1:1 – 3:1 | Marginal; tighten CAC or lift LTV |
| ~3:1 | Healthy, efficient growth |
| Above 5:1 | Often underinvesting in growth |
A very high ratio isn't automatically good. Above 5:1 you may be leaving growth on the table — you could likely spend more on acquisition and still profit.
You move the ratio by raising LTV or lowering CAC. Reduce churn to extend customer lifespan, add expansion revenue through upsells, focus ad spend on your most efficient channels, and lift conversion rates so each dollar of traffic goes further.